shithub: riscv

--- a/sys/src/cmd/diff/test/diff-t10.1

+++ /dev/null

@@ -1,1 +1,0 @@

-a line of text

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t10.2

+++ /dev/null

@@ -1,1 +1,0 @@

-Another line of text

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t10.expected

+++ b/sys/src/cmd/diff/test/diff-t10.expected

@@ -1,5 +1,5 @@

---- diff-t10.1

-+++ diff-t10.2

+--- diff-t10.l

++++ diff-t10.r

 @@ -1 +1 @@

 -a line of text

 +Another line of text

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t10.l

@@ -1,0 +1,1 @@

+a line of text

\ No newline at end of file

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t10.r

@@ -1,0 +1,1 @@

+Another line of text

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t11.1

+++ /dev/null

@@ -1,1003 +1,0 @@

-.\"	$OpenBSD: t11.1,v 1.2 2007/11/27 16:22:12 martynas Exp $

-.\"	$NetBSD: ed.1,v 1.13 1995/03/21 09:04:38 cgd Exp $

-.\"

-.TH ED 1 "21 May 1993"

-.SH NAME

-.\" ed, red \- text editor

-ed \- text editor

-.SH SYNOPSIS

-ed [-] [-sx] [-p \fIstring\fR] [\fIfile\fR]

-.\" .LP

-.\" red [-] [-sx] [-p \fIstring\fR] [\fIfile\fR]

-.SH DESCRIPTION

-.B ed

-is a line-oriented text editor.

-It is used to create, display, modify and otherwise manipulate text

-files.

-.\" .B red

-.\" is a restricted

-.\" .BR ed :

-.\" it can only edit files in the current

-.\" directory and cannot execute shell commands.

-If invoked with a

-.I file

-argument, then a copy of

-.I file

-is read into the editor's buffer.

-Changes are made to this copy and not directly to

-.I file

-itself.

-Upon quitting

-.BR ed ,

-any changes not explicitly saved  with a

-.I `w'

-command are lost.

-Editing is done in two distinct modes:

-.I command

-and

-.IR input .

-When first invoked,

-.B ed

-is in command mode.

-In this mode commands are read from the standard input and

-executed to manipulate the contents of the editor buffer.

-A typical command might look like:

-.sp

-.RS

-,s/\fIold\fR/\fInew\fR/g

-.RE

-.sp

-which replaces all occurrences of the string

-.I old

-with

-.IR new .

-When an input command, such as

-.I `a'

-(append),

-.I `i'

-(insert) or

-.I `c'

-(change), is given,

-.B ed

-enters input mode.  This is the primary means

-of adding text to a file.

-In this mode, no commands are available;

-instead, the standard input is written

-directly to the editor buffer.  Lines consist of text up to and

-including a

-.IR newline

-character.

-Input mode is terminated by

-entering a single period  (\fI.\fR) on a line.

-All

-.B ed

-commands operate on whole lines or ranges of lines; e.g.,

-the

-.I `d'

-command deletes lines; the

-.I `m'

-command moves lines, and so on.

-It is possible to modify only a portion of a line by means of replacement,

-as in the example above.  However even here, the

-.I `s'

-command is applied to whole lines at a time.

-In general,

-.B ed

-commands consist of zero or more line addresses, followed by a single

-character command and possibly additional parameters; i.e.,

-commands have the structure:

-.sp

-.RS

-.I [address [,address]]command[parameters]

-.RE

-.sp

-The address(es) indicate the line or range of lines to be affected by the

-command.  If fewer addresses are given than the command accepts, then

-default addresses are supplied.

-.SS OPTIONS

-.TP 8

--s

-Suppresses diagnostics. This should be used if

-.BR ed 's

-standard input is from a script.

-.TP 8

--x

-Prompts for an encryption key to be used in subsequent reads and writes

-(see the

-.I `x'

-command).

-.TP 8

-.RI \-p \ string

-Specifies a command prompt.  This may be toggled on and off with the

-.I `P'

-command.

-.TP 8

-.I file

-Specifies the name of a file to read.  If

-.I file

-is prefixed with a

-bang (!), then it is interpreted as a shell command.  In this case,

-what is read is

-the standard output of

-.I file

-executed via

-.IR sh (1).

-To read a file whose name begins with a bang, prefix the

-name with a backslash (\\).

-The default filename is set to

-.I file

-only if it is not prefixed with a bang.

-.SS LINE ADDRESSING

-An address represents the number of a line in the buffer.

-.B ed

-maintains a

-.I current address

-which is

-typically supplied to commands as the default address when none is specified.

-When a file is first read,  the current address is set to the last line

-of the file.  In general, the current address is set to the last line

-affected by a command.

-A line address is

-constructed from one of the bases in the list below, optionally followed

-by a numeric offset.  The offset may include any combination

-of digits, operators (i.e.,

-.IR + ,

-.I -

-and

-.IR ^ )

-and whitespace.

-Addresses are read from left to right, and their values are computed

-relative to the current address.

-One exception to the rule that addresses represent line numbers is the

-address

-.I 0

-(zero).

-This means "before the first line,"

-and is legal wherever it makes sense.

-An address range is two addresses separated either by a comma or

-semi-colon. The value of the first address in a range cannot exceed the

-value of the second.  If only one address is given in a range, then

-the second address is set to the given address.  If an

-.IR n- tuple

-of addresses is given where

-.I n > 2,

-then the corresponding range is determined by the last two addresses in

-the

-.IR n- tuple.

-If only one address is expected, then the last address is used.

-Each address in a comma-delimited range is interpreted relative to the

-current address.  In a semi-colon-delimited range, the first address is

-used to set the current address, and the second address is interpreted

-relative to the first.

-The following address symbols are recognized.

-.TP 8

-\&.

-The current line (address) in the buffer.

-.TP 8

-$

-The last line in the buffer.

-.TP 8

-n

-The

-.IR n th,

-line in the buffer

-where

-.I n

-is a number in the range

-.I [0,$].

-.TP 8

-- or ^

-The previous line.

-This is equivalent to

-.I -1

-and may be repeated with cumulative effect.

-.TP 8

--\fIn\fR or ^\fIn\fR

-The

-.IR n th

-previous line, where

-.I n

-is a non-negative number.

-.TP 8

-+

-The

-next line.

-This is equivalent to

-.I +1

-and may be repeated with cumulative effect.

-.TP 8

-+\fIn\fR or whitespace\fIn\fR

-The

-.IR n th

-next line, where

-.I n

-is a non-negative number.

-.I whitespace

-followed by a number

-.I n

-is interpreted as

-.IR +n .

-.TP 8

-, \fRor\fB %

-The first through last lines in the buffer.  This is equivalent to

-the address range

-.I 1,$.

-.TP 8

-;

-The

-current through last lines in the buffer.  This is equivalent to

-the address range

-.I .,$.

-.TP 8

-.RI / re/

-The

-next line containing the regular expression

-.IR re .

-The search wraps to the beginning of the buffer and continues down to the

-current line, if necessary.

-// repeats the last search.

-.TP 8

-.RI ? re?

-The

-previous line containing the regular expression

-.IR re .

-The search wraps to the end of the buffer and continues up to the

-current line, if necessary.

-?? repeats the last search.

-.TP 8

-.RI \' lc

-The

-line previously marked by a

-.I `k'

-(mark) command, where

-.I lc

-is a lower case letter.

-.SS REGULAR EXPRESSIONS

-Regular expressions are patterns used in selecting text.

-For example, the

-.B ed

-command

-.sp

-.RS

-g/\fIstring\fR/

-.RE

-.sp

-prints all lines containing

-.IR string .

-Regular expressions are also

-used by the

-.I `s'

-command for selecting old text to be replaced with new.

-In addition to a specifying string literals, regular expressions can

-represent

-classes of strings.  Strings thus represented are said to be matched

-by the corresponding regular expression.

-If it is possible for a regular expression

-to match several strings in a line, then the left-most longest match is

-the one selected.

-The following symbols are used in constructing regular expressions:

-.TP 8

-c

-Any character

-.I c

-not listed below, including `{', '}', `(', `)', `<' and `>',

-matches itself.

-.TP 8

-\fR\e\fIc\fR

-Any backslash-escaped character

-.IR c ,

-except for `{', '}', `(', `)', `<' and `>',

-matches itself.

-.TP 8

-\fR.\fR

-Matches any single character.

-.TP 8

-.I [char-class]

-Matches any single character in

-.IR char-class .

-To include a  `]'

-in

-.IR char-class ,

-it must be the first character.

-A range of characters may be specified by separating the end characters

-of the range with a `-', e.g., `a-z' specifies the lower case characters.

-The following literal expressions can also be used in

-.I char-class

-to specify sets of characters:

-.sp

-\ \ [:alnum:]\ \ [:cntrl:]\ \ [:lower:]\ \ [:space:]

-.PD 0

-\ \ [:alpha:]\ \ [:digit:]\ \ [:print:]\ \ [:upper:]

-.PD 0

-\ \ [:blank:]\ \ [:graph:]\ \ [:punct:]\ \ [:xdigit:]

-.sp

-If `-' appears as the first or last

-character of

-.IR char-class ,

-then it matches itself.

-All other characters in

-.I char-class

-match themselves.

-.sp

-Patterns in

-.I char-class

-of the form:

-.sp

-\ \ [.\fIcol-elm\fR.] or,

-.PD 0

-\ \ [=\fIcol-elm\fR=]

-.sp

-where

-.I col-elm

-is a

-.I collating element

-are interpreted according to

-.IR locale (5)

-(not currently supported).

-See

-.IR regex (3)

-for an explanation of these constructs.

-.TP 8

-[^\fIchar-class\fR]

-Matches any single character, other than newline, not in

-.IR char-class .

-.IR char-class

-is defined

-as above.

-.TP 8

-^

-If `^' is the first character of a regular expression, then it

-anchors the regular expression to the beginning of a line.

-Otherwise, it matches itself.

-.TP 8

-$

-If `$' is the last character of a regular expression, it

-anchors the regular expression to the end of a line.

-Otherwise, it matches itself.

-.TP 8

-\fR\e<\fR

-Anchors the single character regular expression or subexpression

-immediately following it to the beginning of a word.

-(This may not be available)

-.TP 8

-\fR\e>\fR

-Anchors the single character regular expression or subexpression

-immediately following it to the end of a word.

-(This may not be available)

-.TP 8

-\fR\e(\fIre\fR\e)\fR

-Defines a subexpression

-.IR re .

-Subexpressions may be nested.

-A subsequent backreference of the form \fI`\en'\fR, where

-.I n

-is a number in the range [1,9], expands to the text matched by the

-.IR n th

-subexpression.

-For example, the regular expression `\e(.*\e)\e1' matches any string

-consisting of identical adjacent substrings.

-Subexpressions are ordered relative to

-their left delimiter.

-.TP 8

-*

-Matches the single character regular expression or subexpression

-immediately preceding it zero or more times.  If '*' is the first

-character of a regular expression or subexpression, then it matches

-itself.  The `*' operator sometimes yields unexpected results.

-For example, the regular expression `b*' matches the beginning of

-the string `abbb' (as opposed to the substring `bbb'), since a null match

-is the only left-most match.

-.TP 8

-\fR\e{\fIn,m\fR\e}\fR or \fR\e{\fIn,\fR\e}\fR or \fR\e{\fIn\fR\e}\fR

-Matches the single character regular expression or subexpression

-immediately preceding it at least

-.I n

-and at most

-.I m

-times.

-If

-.I m

-is omitted, then it matches at least

-.I n

-times.

-If the comma is also omitted, then it matches exactly

-.I n

-times.

-.LP

-Additional regular expression operators may be defined depending on the

-particular

-.IR regex (3)

-implementation.

-.SS COMMANDS

-All

-.B ed

-commands are single characters, though some require additonal parameters.

-If a command's parameters extend over several lines, then

-each line except for the last

-must be terminated with a backslash (\\).

-In general, at most one command is allowed per line.

-However, most commands accept a print suffix, which is any of

-.I `p'

-(print),

-.I `l'

-(list) ,

-or

-.I `n'

-(enumerate),

-to print the last line affected by the command.

-An interrupt (typically ^C) has the effect of aborting the current command

-and returning the editor to command mode.

-.B ed

-recognizes the following commands.  The commands are shown together with

-the default address or address range supplied if none is

-specified (in parenthesis).

-.TP 8

-(.)a

-Appends text to the buffer after the addressed line.

-Text is entered in input mode.

-The current address is set to last line entered.

-.TP 8

-(.,.)c

-Changes lines in the buffer.  The addressed lines are deleted

-from the buffer, and text is appended in their place.

-Text is entered in input mode.

-The current address is set to last line entered.

-.TP 8

-(.,.)d

-Deletes the addressed lines from the buffer.

-If there is a line after the deleted range, then the current address is set

-to this line. Otherwise the current address is set to the line

-before the deleted range.

-.TP 8

-.RI e \ file

-Edits

-.IR file ,

-and sets the default filename.

-If

-.I file

-is not specified, then the  default filename is used.

-Any lines in the buffer are deleted before

-the new file is read.

-The current address is set to the last line read.

-.TP 8

-.RI e \ !command

-Edits the standard output of

-.IR `!command' ,

-(see

-.RI ! command

-below).

-The default filename is unchanged.

-Any lines in the buffer are deleted before the output of

-.I command

-is read.

-The current address is set to the last line read.

-.TP 8

-.RI E \ file

-Edits

-.I file

-unconditionally.

-This is similar to the

-.I e

-command,

-except that unwritten changes are discarded without warning.

-The current address is set to the last line read.

-.TP 8

-.RI f \ file

-Sets the default filename to

-.IR file .

-If

-.I file

-is not specified, then the default unescaped filename is printed.

-.TP 8

-.RI (1,$)g /re/command-list

-Applies

-.I command-list

-to each of the addressed lines matching a regular expression

-.IR re .

-The current address is set to the

-line currently matched before

-.I command-list

-is executed.

-At the end of the

-.I `g'

-command, the current address is set to the last line affected by

-.IR command-list .

-Each command in

-.I command-list

-must be on a separate line,

-and every line except for the last must be terminated by a backslash

-(\\).

-Any commands are allowed, except for

-.IR `g' ,

-.IR `G' ,

-.IR `v' ,

-and

-.IR `V' .

-A newline alone in

-.I command-list

-is equivalent to a

-.I `p'

-command.

-.TP 8

-.RI (1,$)G /re/

-Interactively edits the addressed lines matching a regular expression

-.IR re.

-For each matching line,

-the line is printed,

-the current address is set,

-and the user is prompted to enter a

-.IR command-list .

-At the end of the

-.I `G'

-command, the current address

-is set to the last line affected by (the last)

-.IR command-list .

-The format of

-.I command-list

-is the same as that of the

-.I `g'

-command.  A newline alone acts as a null command list.

-A single `&' repeats the last non-null command list.

-.TP 8

-H

-Toggles the printing of error explanations.

-By default, explanations are not printed.

-It is recommended that ed scripts begin with this command to

-aid in debugging.

-.TP 8

-h

-Prints an explanation of the last error.

-.TP 8

-(.)i

-Inserts text in the buffer before the current line.

-Text is entered in input mode.

-The current address is set to the last line entered.

-.TP 8

-(.,.+1)j

-Joins the addressed lines.  The addressed lines are

-deleted from the buffer and replaced by a single

-line containing their joined text.

-The current address is set to the resultant line.

-.TP 8

-.RI (.)k lc

-Marks a line with a lower case letter

-.IR lc .

-The  line can then be addressed as

-.I 'lc

-(i.e., a single quote followed by

-.I lc

-) in subsequent commands.  The mark is not cleared until the line is

-deleted or otherwise modified.

-.TP 8

-(.,.)l

-Prints the addressed lines unambiguously.

-If a single line fills for than one screen (as might be the case

-when viewing a binary file, for instance), a `--More--'

-prompt is printed on the last line.

-.B ed

-waits until the RETURN key is pressed

-before displaying the next screen.

-The current address is set to the last line

-printed.

-.TP 8

-(.,.)m(.)

-Moves lines in the buffer.  The addressed lines are moved to after the

-right-hand destination address, which may be the address

-.IR 0

-(zero).

-The current address is set to the

-last line moved.

-.TP 8

-(.,.)n

-Prints the addressed lines along with

-their line numbers.  The current address is set to the last line

-printed.

-.TP 8

-(.,.)p

-Prints the addressed lines. The current address is set to the last line

-printed.

-.TP 8

-P

-Toggles the command prompt on and off.

-Unless a prompt was specified by with command-line option

-\fI-p string\fR, the command prompt is by default turned off.

-.TP 8

-q

-Quits ed.

-.TP 8

-Q

-Quits ed unconditionally.

-This is similar to the

-.I q

-command,

-except that unwritten changes are discarded without warning.

-.TP 8

-.RI ($)r \ file

-Reads

-.I file

-to after the addressed line.  If

-.I file

-is not specified, then the default

-filename is used.  If there was no default filename prior to the command,

-then the default filename is set to

-.IR file .

-Otherwise, the default filename is unchanged.

-The current address is set to the last line read.

-.TP 8

-.RI ($)r \ !command

-Reads

-to after the addressed line

-the standard output of

-.IR `!command' ,

-(see the

-.RI ! command

-below).

-The default filename is unchanged.

-The current address is set to the last line read.

-.HP

-.RI (.,.)s /re/replacement/

-.PD 0

-.HP

-.RI (.,.)s  /re/replacement/\fRg\fR

-.HP

-.RI (.,.)s  /re/replacement/n

-.br

-Replaces text in the addressed lines

-matching a regular expression

-.I re

-with

-.IR replacement .

-By default, only the first match in each line is replaced.

-If the

-.I `g'

-(global) suffix is given, then every match to be replaced.

-The

-.I `n'

-suffix, where

-.I n

-is a postive number, causes only the

-.IR n th

-match to be replaced.

-It is an error if no substitutions are performed on any of the addressed

-lines.

-The current address is set the last line affected.

-.I re

-and

-.I replacement

-may be delimited by any character other than space and newline

-(see the

-.I `s'

-command below).

-If one or two of the last delimiters is omitted, then the last line

-affected is printed as though the print suffix

-.I `p'

-were specified.

-An unescaped `&' in

-.I replacement

-is replaced by the currently matched text.

-The character sequence

-\fI`\em'\fR,

-where

-.I m

-is a number in the range [1,9], is replaced by the

-.IR m th

-backreference expression of the matched text.

-If

-.I replacement

-consists of a single `%', then

-.I replacement

-from the last substitution is used.

-Newlines may be embedded in

-.I replacement

-if they are escaped with a backslash (\\).

-.TP 8

-(.,.)s

-Repeats the last substitution.

-This form of the

-.I `s'

-command accepts a count suffix

-.IR `n' ,

-or any combination of the characters

-.IR `r' ,

-.IR `g' ,

-and

-.IR `p' .

-If a count suffix

-.I `n'

-is given, then only the

-.IR n th

-match is replaced.

-The

-.I `r'

-suffix causes

-the regular expression of the last search to be used instead of the

-that of the last substitution.

-The

-.I `g'

-suffix toggles the global suffix of the last substitution.

-The

-.I `p'

-suffix toggles the print suffix of the last substitution

-The current address is set to the last line affected.

-.TP 8

-(.,.)t(.)

-Copies (i.e., transfers) the addressed lines to after the right-hand

-destination address, which may be the address

-.IR 0

-(zero).

-The current address is set to the last line

-copied.

-.TP 8

-u

-Undoes the last command and restores the current address

-to what it was before the command.

-The global commands

-.IR `g' ,

-.IR `G' ,

-.IR `v' ,

-and

-.IR `V' .

-are treated as a single command by undo.

-.I `u'

-is its own inverse.

-.TP 8

-.RI (1,$)v /pat/command-list

-Applies

-.I command-list

-to each of the addressed lines not matching a regular expression

-.IR re .

-This is similar to the

-.I `g'

-command.

-.TP 8

-.RI (1,$)V /re/

-Interactively edits the addressed lines not matching a regular expression

-.IR re.

-This is similar to the

-.I `G'

-command.

-.TP 8

-.RI (1,$)w \ file

-Writes the addressed lines to

-.IR file .

-Any previous contents of

-.I file

-is lost without warning.

-If there is no default filename, then the default filename is set to

-.IR file,

-otherwise it is unchanged.  If no filename is specified, then the default

-filename is used.

-The current address is unchanged.

-.TP 8

-.RI (1,$)wq \ file

-Writes the addressed lines to

-.IR file ,

-and then executes a

-.I `q'

-command.

-.TP 8

-.RI (1,$)w \ !command

-Writes the addressed lines to the standard input of

-.IR `!command' ,

-(see the

-.RI ! command

-below).

-The default filename and current address are unchanged.

-.TP 8

-.RI (1,$)W \ file

-Appends the addressed lines to the end of

-.IR file .

-This is similar to the

-.I `w'

-command, expect that the previous contents of file is not clobbered.

-The current address is unchanged.

-.TP 8

-x

-Prompts for an encryption key which is used in subsequent reads and

-writes.  If a newline alone is entered as the key, then encryption is

-turned off.  Otherwise, echoing is disabled while a key is read.

-Encryption/decryption is done using the bdes(1) algorithm.

-.TP 8

-.RI (.+1)z n

-Scrolls

-.I n

-lines at a time starting at addressed line.  If

-.I n

-is not specified, then the current window size is used.

-The current address is set to the last line printed.

-.TP 8

-.RI ! command

-Executes

-.I command

-via

-.IR sh (1).

-If the first character of

-.I command

-is `!', then it is replaced by text of the

-previous

-.IR `!command' .

-.B ed

-does not process

-.I command

-for backslash (\\) escapes.

-However, an unescaped

-.I `%'

-is replaced by the default filename.

-When the shell returns from execution, a `!'

-is printed to the standard output.

-The current line is unchanged.

-.TP 8

-($)=

-Prints the line number of the addressed line.

-.TP 8

-(.+1)newline

-Prints the addressed line, and sets the current address to

-that line.

-.SH FILES

-.TP 20

-/tmp/ed.*

-Buffer file

-.PD 0

-.TP 20

-ed.hup

-The file to which

-.B ed

-attempts to write the  buffer if the terminal hangs up.

-.SH SEE ALSO

-.IR vi (1),

-.IR sed (1),

-.IR regex (3),

-.IR bdes (1),

-.IR sh (1).

-USD:12-13

-B. W. Kernighan and P. J. Plauger,

-.I Software Tools in Pascal ,

-Addison-Wesley, 1981.

-.SH LIMITATIONS

-.B ed

-processes

-.I file

-arguments for backslash escapes, i.e.,  in a filename,

-any characters preceded by a backslash (\\) are

-interpreted literally.

-If a text (non-binary) file is not terminated by a newline character,

-then

-.B ed

-appends one on reading/writing it.  In the case of a binary file,

-.B ed

-does not append a newline on reading/writing.

-per line overhead: 4 ints

-.SH DIAGNOSTICS

-When an error occurs,

-.B ed

-prints a `?' and either returns to command mode

-or exits if its input is from a script.

-An explanation of the last error can be

-printed with the

-.I `h'

-(help) command.

-Since the

-.I `g'

-(global) command  masks any errors from failed searches and substitutions,

-it can be used to perform conditional operations in scripts; e.g.,

-.sp

-.RS

-g/\fIold\fR/s//\fInew\fR/

-.RE

-.sp

-replaces any occurrences of

-.I old

-with

-.IR new .

-If the

-.I `u'

-(undo) command occurs in a global command list, then

-the command list is executed only once.

-If diagnostics are not disabled, attempting to quit

-.B ed

-or edit another file before writing a modified buffer

-results in an error.

-If the command is entered a second time, it succeeds,

-but any changes to the buffer are lost.

--- a/sys/src/cmd/diff/test/diff-t11.2

+++ /dev/null

@@ -1,908 +1,0 @@

-.\"	$OpenBSD: t11.2,v 1.1 2003/07/21 20:16:21 otto Exp $

-.\"

-.Dd May 2, 1993

-.Dt ED 1

-.Os

-.Sh NAME

-.Nm ed

-.Nd text editor

-.Sh SYNOPSIS

-.Nm ed

-.Op Fl

-.Op Fl sx

-.Op Fl p Ar string

-.Op Ar file

-.Sh DESCRIPTION

-.Nm

-is a line-oriented text editor.

-It is used to create, display, modify, and otherwise manipulate text files.

-If invoked with a

-.Ar file

-argument, then a copy of

-.Ar file

-is read into the editor's buffer.

-Changes are made to this copy and not directly to

-.Ar file

-itself.

-Upon quitting

-.Nm ed ,

-any changes not explicitly saved with a

-.Em w

-command are lost.

-.Pp

-Editing is done in two distinct modes:

-.Em command

-and

-.Em input .

-When first invoked,

-.Nm

-is in command mode.

-In this mode, commands are read from the standard input and

-executed to manipulate the contents of the editor buffer.

-.Pp

-A typical command might look like:

-.Bd -literal -offset indent

-,s/old/new/g

-.Ed

-.Pp

-which replaces all occurrences of the string

-.Pa old

-with

-.Pa new .

-.Pp

-When an input command, such as

-.Em a

-(append),

-.Em i

-(insert),

-or

-.Em c

-(change) is given,

-.Nm

-enters input mode.

-This is the primary means of adding text to a file.

-In this mode, no commands are available;

-instead, the standard input is written directory to the editor buffer.

-Lines consist of text up to and including a newline character.

-Input mode is terminated by entering a single period

-.Pq Ql \&.

-on a line.

-.Pp

-All

-.Nm

-commands operate on whole lines or ranges of lines; e.g.,

-the

-.Em d

-command deletes lines; the

-.Em m

-command moves lines, and so on.

-It is possible to modify only a portion of a line by means of replacement,

-as in the example above.

-However, even here, the

-.Em s

-command is applied to whole lines at a time.

-.Pp

-In general,

-.Nm

-commands consist of zero or more line addresses, followed by a single

-character command and possibly additional parameters; i.e.,

-commands have the structure:

-.Bd -literal -offset indent

-[address [,address]]command[parameters]

-.Ed

-.Pp

-The address(es) indicate the line or range of lines to be affected by the

-command.

-If fewer addresses are given than the command accepts, then

-default addresses are supplied.

-.Pp

-The options are as follows:

-.Bl -tag -width Ds

-.It Fl

-Same as the

-.Fl s

-option (deprecated).

-.It Fl s

-Suppress diagnostics.

-This should be used if

-.Nm

-standard input is from a script.

-.Fl s

-flag.

-.It Fl x

-Prompt for an encryption key to be used in subsequent reads and writes

-(see the

-.Em x

-command).

-.It Fl p Ar string

-Specifies a command prompt.

-This may be toggled on and off with the

-.Em P

-command.

-.It Ar file

-Specifies the name of a file to read.

-If

-.Ar file

-is prefixed with a

-bang

-.Pq Ql \&! ,

-then it is interpreted as a shell command.

-In this case, what is read is the standard output of

-.Ar file

-executed via

-.Xr sh 1 .

-To read a file whose name begins with a bang, prefix the

-name with a backslash

-.Pq Ql \e .

-The default filename is set to

-.Ar file

-only if it is not prefixed with a bang.

-.El

-.Ss LINE ADDRESSING

-An address represents the number of a line in the buffer.

-.Nm

-maintains a

-.Em current address

-which is typically supplied to commands as the default address

-when none is specified.

-When a file is first read, the current address is set to the last line

-of the file.

-In general, the current address is set to the last line affected by a command.

-.Pp

-A line address is

-constructed from one of the bases in the list below, optionally followed

-by a numeric offset.

-The offset may include any combination of digits, operators (i.e.,

-.Em + ,

-.Em - ,

-and

-.Em ^ ) ,

-and whitespace.

-Addresses are read from left to right, and their values are computed

-relative to the current address.

-.Pp

-One exception to the rule that addresses represent line numbers is the

-address

-.Em 0

-(zero).

-This means

-.Dq before the first line ,

-and is legal wherever it makes sense.

-.Pp

-An address range is two addresses separated either by a comma or semi-colon.

-The value of the first address in a range cannot exceed the

-value of the second.

-If only one address is given in a range,

-then the second address is set to the given address.

-If an

-.Em n Ns No -tuple

-of addresses is given where

-.Em n > 2 ,

-then the corresponding range is determined by the last two addresses in the

-.Em n Ns No -tuple.

-If only one address is expected, then the last address is used.

-.Pp

-Each address in a comma-delimited range is interpreted relative to the

-current address.

-In a semi-colon-delimited range, the first address is

-used to set the current address, and the second address is interpreted

-relative to the first.

-.Pp

-The following address symbols are recognized:

-.Bl -tag -width Ds

-.It Em \&.

-The current line (address) in the buffer.

-.It Em $

-The last line in the buffer.

-.It Em n

-The

-.Em n Ns No th

-line in the buffer where

-.Em n

-is a number in the range

-.Em [0,$] .

-.It Em - No or Em ^

-The previous line.

-This is equivalent to

-.Em -1

-and may be repeated with cumulative effect.

-.It Em -n No or Em ^n

-The

-.Em n Ns No th

-previous line, where

-.Em n

-is a non-negative number.

-.It Em +

-The next line.

-This is equivalent to

-.Em +1

-and may be repeated with cumulative effect.

-.It Em +n

-The

-.Em n Ns No th

-next line, where

-.Em n

-is a non-negative number.

-.It Em \&, No or Em %

-The first through last lines in the buffer.

-This is equivalent to the address range

-.Em 1,$ .

-.It Em \&;

-The current through last lines in the buffer.

-This is equivalent to the address range

-.Em .,$ .

-.It Em / Ns No re Ns Em /

-The next line containing the regular expression

-.Em re .

-The search wraps to the beginning of the buffer and continues down to the

-current line, if necessary.

-.Em //

-repeats the last search.

-.It Em ? Ns No re Ns Em ?

-The previous line containing the regular expression

-.Em re .

-The search wraps to the end of the buffer and continues up to the

-current line, if necessary.

-.Em ??

-repeats the last search.

-.It Em \&\' Ns No lc

-The line previously marked by a

-.Em k

-(mark) command, where

-.Em lc

-is a lower case letter.

-.El

-.Ss REGULAR EXPRESSIONS

-Regular expressions are patterns used in selecting text.

-For example, the

-.Nm

-command

-.Bd -literal -offset indent

-g/string/

-.Ed

-.Pp

-prints all lines containing

-.Em string .

-Regular expressions are also used by the

-.Em s

-command for selecting old text to be replaced with new.

-.Pp

-In addition to a specifying string literals, regular expressions can

-represent classes of strings.

-Strings thus represented are said to be matched by the

-corresponding regular expression.

-If it is possible for a regular expression to match several strings in

-a line, then the leftmost longest match is the one selected.

-.Pp

-The following symbols are used in constructing regular expressions:

-.Bl -tag -width Dsasdfsd

-.It Em c

-Any character

-.Em c

-not listed below, including

-.Em { Ns No ,

-.Em } Ns No ,

-.Em \&( Ns No ,

-.Em \&) Ns No ,

-.Em < Ns No ,

-and

-.Em >

-matches itself.

-.It Em \ec

-Any backslash-escaped character

-.Em c Ns No ,

-except for

-.Em { Ns No ,

-.Em } Ns No ,

-.Em \&( Ns No ,

-.Em \&) Ns No ,

-.Em < Ns No , and

-.Em >

-matches itself.

-.It Em \&.

-Matches any single character.

-.It Em [char-class]

-Matches any single character in

-.Em char-class .

-To include a

-.Ql \&]

-in

-.Em char-class Ns No ,

-it must be the first character.

-A range of characters may be specified by separating the end characters

-of the range with a

-.Ql - ;

-e.g.,

-.Em a-z

-specifies the lower case characters.

-The following literal expressions can also be used in

-.Em char-class

-to specify sets of characters:

-.Pp

-.Em \ \ [:alnum:]\ \ [:cntrl:]\ \ [:lower:]\ \ [:space:]

-.Em \ \ [:alpha:]\ \ [:digit:]\ \ [:print:]\ \ [:upper:]

-.Em \ \ [:blank:]\ \ [:graph:]\ \ [:punct:]\ \ [:xdigit:]

-.Pp

-If

-.Ql -

-appears as the first or last character of

-.Em char-class Ns No ,

-then it matches itself.

-All other characters in

-.Em char-class

-match themselves.

-.Pp

-Patterns in

-.Em char-class

-of the form

-.Em [.col-elm.] No or Em [=col-elm=]

-where

-.Em col-elm

-is a collating element are interpreted according to

-.Xr locale 5

-(not currently supported).

-See

-.Xr regex 3

-for an explanation of these constructs.

-.It Em [^char-class]

-Matches any single character, other than newline, not in

-.Em char-class Ns No .

-.Em char-class

-is defined as above.

-.It Em ^

-If

-.Em ^

-is the first character of a regular expression, then it

-anchors the regular expression to the beginning of a line.

-Otherwise, it matches itself.

-.It Em $

-If

-.Em $

-is the last character of a regular expression,

-it anchors the regular expression to the end of a line.

-Otherwise, it matches itself.

-.It Em \e<

-Anchors the single character regular expression or subexpression

-immediately following it to the beginning of a word.

-(This may not be available.)

-.It Em \e>

-Anchors the single character regular expression or subexpression

-immediately following it to the end of a word.

-(This may not be available.)

-.It Em \e( Ns No re Ns Em \e)

-Defines a subexpression

-.Em re .

-Subexpressions may be nested.

-A subsequent backreference of the form

-.Em \en Ns No ,

-where

-.Em n

-is a number in the range [1,9], expands to the text matched by the

-.Em n Ns No th

-subexpression.

-For example, the regular expression

-.Em \e(.*\e)\e1

-matches any string consisting of identical adjacent substrings.

-Subexpressions are ordered relative to their left delimiter.

-.It Em *

-Matches the single character regular expression or subexpression

-immediately preceding it zero or more times.

-If

-.Em *

-is the first character of a regular expression or subexpression,

-then it matches itself.

-The

-.Em *

-operator sometimes yields unexpected results.

-For example, the regular expression

-.Em b*

-matches the beginning of the string

-.Em abbb

-(as opposed to the substring

-.Em bbb Ns No ),

-since a null match is the only leftmost match.

-.Sm off

-.It Xo Em \e{ No n,m

-.Em \e}\ \e{ No n, Em \e}\

-.Em \e{ No n Em \e}

-.Xc

-.Sm on

-Matches the single character regular expression or subexpression

-immediately preceding it at least

-.Em n

-and at most

-.Em m

-times.

-If

-.Em m

-is omitted, then it matches at least

-.Em n

-times.

-If the comma is also omitted, then it matches exactly

-.Em n

-times.

-.El

-.Pp

-Additional regular expression operators may be defined depending on the

-particular

-.Xr regex 3

-implementation.

-.Ss COMMANDS

-All

-.Nm

-commands are single characters, though some require additional parameters.

-If a command's parameters extend over several lines, then

-each line except for the last must be terminated with a backslash

-.Pq Ql \e .

-.Pp

-In general, at most one command is allowed per line.

-However, most commands accept a print suffix, which is any of

-.Em p No (print),

-.Em l No (list),

-or

-.Em n No (enumerate),

-to print the last line affected by the command.

-.Pp

-An interrupt (typically ^C) has the effect of aborting the current command

-and returning the editor to command mode.

-.Pp

-.Nm

-recognizes the following commands.

-The commands are shown together with

-the default address or address range supplied if none is

-specified (in parentheses), and other possible arguments on the right.

-.Bl -tag -width Dxxs

-.It (.) Ns Em a

-Appends text to the buffer after the addressed line.

-Text is entered in input mode.

-The current address is set to last line entered.

-.It (.,.) Ns Em c

-Changes lines in the buffer.

-The addressed lines are deleted from the buffer,

-and text is appended in their place.

-Text is entered in input mode.

-The current address is set to last line entered.

-.It (.,.) Ns Em d

-Deletes the addressed lines from the buffer.

-If there is a line after the deleted range, then the current address is set

-to this line.

-Otherwise the current address is set to the line before the deleted range.

-.It Em e No file

-Edits

-.Em file Ns No ,

-and sets the default filename.

-If

-.Em file

-is not specified, then the default filename is used.

-Any lines in the buffer are deleted before the new file is read.

-The current address is set to the last line read.

-.It Em e No !command

-Edits the standard output of

-.Em !command Ns No ,

-(see

-.Em ! No command

-below).

-The default filename is unchanged.

-Any lines in the buffer are deleted before the output of

-.Em command

-is read.

-The current address is set to the last line read.

-.It Em E No file

-Edits

-.Em file

-unconditionally.

-This is similar to the

-.Em e

-command, except that unwritten changes are discarded without warning.

-The current address is set to the last line read.

-.It Em f No file

-Sets the default filename to

-.Em file Ns No .

-If

-.Em file

-is not specified, then the default unescaped filename is printed.

-.It (1,$) Ns Em g Ns No /re/command-list

-Applies

-.Em command-list

-to each of the addressed lines matching a regular expression

-.Em re Ns No .

-The current address is set to the line currently matched before

-.Em command-list

-is executed.

-At the end of the

-.Em g

-command, the current address is set to the last line affected by

-.Em command-list Ns No .

-.Pp

-Each command in

-.Em command-list

-must be on a separate line,

-and every line except for the last must be terminated by

-.Em \e No (backslash).

-Any commands are allowed, except for

-.Em g Ns No ,

-.Em G Ns No ,

-.Em v Ns No ,

-and

-.Em V Ns No .

-A newline alone in

-.Em command-list

-is equivalent to a

-.Em p

-command.

-.It (1,$) Ns Em G Ns No /re/

-Interactively edits the addressed lines matching a regular expression

-.Em re Ns No .

-For each matching line, the line is printed, the current address is set,

-and the user is prompted to enter a

-.Em command-list Ns No .

-At the end of the

-.Em g

-command, the current address is set to the last line affected by (the last)

-.Em command-list Ns No .

-.Pp

-The format of

-.Em command-list

-is the same as that of the

-.Em g

-command.

-A newline alone acts as a null command list.

-A single

-.Em &

-repeats the last non-null command list.

-.It Em H

-Toggles the printing of error explanations.

-By default, explanations are not printed.

-It is recommended that

-.Nm

-scripts begin with this command to aid in debugging.

-.It Em h

-Prints an explanation of the last error.

-.It (.) Ns Em i

-Inserts text in the buffer before the current line.

-Text is entered in input mode.

-The current address is set to the last line entered.

-.It (.,.+1) Ns Em j

-Joins the addressed lines.

-The addressed lines are deleted from the buffer and replaced by a single

-line containing their joined text.

-The current address is set to the resultant line.

-.It (.) Ns Em klc

-Marks a line with a lower case letter

-.Em lc Ns No \&.

-The line can then be addressed as

-.Em \&'lc

-(i.e., a single quote followed by

-.Em lc Ns No )

-in subsequent commands.

-The mark is not cleared until the line is deleted or otherwise modified.

-.It (.,.) Ns Em l

-Prints the addressed lines unambiguously.

-If a single line fills more than one screen (as might be the case

-when viewing a binary file, for instance), a

-.Dq --More--

-prompt is printed on the last line.

-.Nm

-waits until the RETURN key is pressed before displaying the next screen.

-The current address is set to the last line printed.

-.It (.,.) Ns Em m Ns No (.)

-Moves lines in the buffer.

-The addressed lines are moved to after the

-right-hand destination address, which may be the address

-.Em 0

-(zero).

-The current address is set to the last line moved.

-.It (.,.) Ns Em n

-Prints the addressed lines along with their line numbers.

-The current address is set to the last line printed.

-.It (.,.) Ns Em p

-Prints the addressed lines.

-The current address is set to the last line printed.

-.It Em P

-Toggles the command prompt on and off.

-Unless a prompt was specified by with command-line option

-.Fl p Ar string Ns No ,

-the command prompt is by default turned off.

-.It Em q

-Quits

-.Nm ed .

-.It Em Q

-Quits

-.Nm

-unconditionally.

-This is similar to the

-.Em q

-command, except that unwritten changes are discarded without warning.

-.It ($) Ns Em r No file

-Reads

-.Em file

-to after the addressed line.

-If

-.Em file

-is not specified, then the default filename is used.

-If there was no default filename prior to the command,

-then the default filename is set to

-.Em file Ns No .

-Otherwise, the default filename is unchanged.

-The current address is set to the last line read.

-.It ($) Ns Em r No !command

-Reads to after the addressed line the standard output of

-.Em !command Ns No ,

-(see the

-.Em !

-command below).

-The default filename is unchanged.

-The current address is set to the last line read.

-.Sm off

-.It Xo (.,.) Em s No /re/replacement/ , \ (.,.)

-.Em s No /re/replacement/ Em g , No \ (.,.)

-.Em s No /re/replacement/ Em n

-.Xc

-.Sm on

-Replaces text in the addressed lines matching a regular expression

-.Em re

-with

-.Em replacement Ns No .

-By default, only the first match in each line is replaced.

-If the

-.Em g

-(global) suffix is given, then every match to be replaced.

-The

-.Em n

-suffix, where

-.Em n

-is a positive number, causes only the

-.Em n Ns No th

-match to be replaced.

-It is an error if no substitutions are performed on any of the addressed

-lines.

-The current address is set the last line affected.

-.Pp

-.Em re

-and

-.Em replacement

-may be delimited by any character other than space and newline

-(see the

-.Em s

-command below).

-If one or two of the last delimiters is omitted, then the last line

-affected is printed as though the print suffix

-.Em p

-were specified.

-.Pp

-An unescaped

-.Ql \e

-in

-.Em replacement

-is replaced by the currently matched text.

-The character sequence

-.Em \em Ns No ,

-where

-.Em m

-is a number in the range [1,9], is replaced by the

-.Em m Ns No th

-backreference expression of the matched text.

-If

-.Em replacement

-consists of a single

-.Ql % ,

-then

-.Em replacement

-from the last substitution is used.

-Newlines may be embedded in

-.Em replacement

-if they are escaped with a backslash

-.Pq Ql \e .

-.It (.,.) Ns Em s

-Repeats the last substitution.

-This form of the

-.Em s

-command accepts a count suffix

-.Em n Ns No ,

-or any combination of the characters

-.Em r Ns No ,

-.Em g Ns No ,

-and

-.Em p Ns No .

-If a count suffix

-.Em n

-is given, then only the

-.Em n Ns No th

-match is replaced.

-The

-.Em r

-suffix causes

-the regular expression of the last search to be used instead of the

-that of the last substitution.

-The

-.Em g

-suffix toggles the global suffix of the last substitution.

-The

-.Em p

-suffix toggles the print suffix of the last substitution

-The current address is set to the last line affected.

-.It (.,.) Ns Em t Ns No (.)

-Copies (i.e., transfers) the addressed lines to after the right-hand

-destination address, which may be the address

-.Em 0

-(zero).

-The current address is set to the last line copied.

-.It Em u

-Undoes the last command and restores the current address

-to what it was before the command.

-The global commands

-.Em g Ns No ,

-.Em G Ns No ,

-.Em v Ns No ,

-and

-.Em V Ns No .

-are treated as a single command by undo.

-.Em u

-is its own inverse.

-.It (1,$) Ns Em v Ns No /re/command-list

-Applies

-.Em command-list

-to each of the addressed lines not matching a regular expression

-.Em re Ns No .

-This is similar to the

-.Em g

-command.

-.It (1,$) Ns Em V Ns No /re/

-Interactively edits the addressed lines not matching a regular expression

-.Em re Ns No .

-This is similar to the

-.Em G

-command.

-.It (1,$) Ns Em w No file

-Writes the addressed lines to

-.Em file Ns No .

-Any previous contents of

-.Em file

-is lost without warning.

-If there is no default filename, then the default filename is set to

-.Em file Ns No ,

-otherwise it is unchanged.

-If no filename is specified, then the default filename is used.

-The current address is unchanged.

-.It (1,$) Ns Em wq No file

-Writes the addressed lines to

-.Em file Ns No ,

-and then executes a

-.Em q

-command.

-.It (1,$) Ns Em w No !command

-Writes the addressed lines to the standard input of

-.Em !command Ns No ,

-(see the

-.Em !

-command below).

-The default filename and current address are unchanged.

-.It (1,$) Ns Em W No file

-Appends the addressed lines to the end of

-.Em file Ns No .

-This is similar to the

-.Em w

-command, expect that the previous contents of file is not clobbered.

-The current address is unchanged.

-.It Em x

-Prompts for an encryption key which is used in subsequent reads and writes.

-If a newline alone is entered as the key, then encryption is turned off.

-Otherwise, echoing is disabled while a key is read.

-Encryption/decryption is done using the

-.Xr bdes 1

-algorithm.

-.It (.+1) Ns Em z Ns No n

-Scrolls

-.Em n

-lines at a time starting at addressed line.

-If

-.Em n

-is not specified, then the current window size is used.

-The current address is set to the last line printed.

-.It ($) Ns Em =

-Prints the line number of the addressed line.

-.It (.+1) Ns Em newline

-Prints the addressed line, and sets the current address to that line.

-.It Em ! Ns No command

-Executes

-.Em command

-via

-.Xr sh 1 .

-If the first character of

-.Em command

-is

-.Em ! Ns No ,

-then it is replaced by text of the previous

-.Em !command Ns No .

-.Nm

-does not process

-.Em command

-for

-.Em \e

-(backslash) escapes.

-However, an unescaped

-.Em %

-is replaced by the default filename.

-When the shell returns from execution, a

-.Em !

-is printed to the standard output.

-The current line is unchanged.

-.El

-.Sh LIMITATIONS

-.Nm

-processes

-.Em file

-arguments for backslash escapes, i.e., in a filename,

-any characters preceded by a backslash

-.Pq Ql \e

-are interpreted literally.

-.Pp

-If a text (non-binary) file is not terminated by a newline character,

-then

-.Nm

-appends one on reading/writing it.

-In the case of a binary file,

-.Nm

-does not append a newline on reading/writing.

-.Sh DIAGNOSTICS

-When an error occurs,

-.Nm

-prints a

-.Dq ?

-and either returns to command mode or exits if its input is from a script.

-An explanation of the last error can be printed with the

-.Em h

-(help) command.

-.Pp

-Since the

-.Em g

-(global) command masks any errors from failed searches and substitutions,

-it can be used to perform conditional operations in scripts; e.g.,

-.Bd -literal -offset indent

-g/old/s//new/

-.Ed

-.Pp

-replaces any occurrences of

-.Em old

-with

-.Em new Ns No .

-.Pp

-If the

-.Em u

-(undo) command occurs in a global command list, then

-the command list is executed only once.

-.Pp

-If diagnostics are not disabled, attempting to quit

-.Nm

-or edit another file before writing a modified buffer results in an error.

-If the command is entered a second time, it succeeds,

-but any changes to the buffer are lost.

-.Sh FILES

-.Bl -tag -width /tmp/ed.* -compact

-.It Pa /tmp/ed.*

-buffer file

-.It Pa ed.hup

-where

-.Nm

-attempts to write the buffer if the terminal hangs up

-.El

-.Sh SEE ALSO

-.Xr bdes 1 ,

-.Xr sed 1 ,

-.Xr sh 1 ,

-.Xr vi 1 ,

-.Xr regex 3

-.Pp

-USD:12-13

-.Rs

-.%A B. W. Kernighan

-.%A P. J. Plauger

-.%B Software Tools in Pascal

-.%O Addison-Wesley

-.%D 1981

-.Re

-.Sh HISTORY

-An

-.Nm

-command appeared in

-.At v1 .

--- a/sys/src/cmd/diff/test/diff-t11.expected

+++ b/sys/src/cmd/diff/test/diff-t11.expected

@@ -1,5 +1,5 @@

---- diff-t11.1

-+++ diff-t11.2

+--- diff-t11.l

++++ diff-t11.r

 @@ -1,1003 +1,908 @@

 -.\"	$OpenBSD: t11.1,v 1.2 2007/11/27 16:22:12 martynas Exp $

 -.\"	$NetBSD: ed.1,v 1.13 1995/03/21 09:04:38 cgd Exp $

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t11.l

@@ -1,0 +1,1003 @@

+.\"	$OpenBSD: t11.1,v 1.2 2007/11/27 16:22:12 martynas Exp $

+.\"	$NetBSD: ed.1,v 1.13 1995/03/21 09:04:38 cgd Exp $

+.\"

+.TH ED 1 "21 May 1993"

+.SH NAME

+.\" ed, red \- text editor

+ed \- text editor

+.SH SYNOPSIS

+ed [-] [-sx] [-p \fIstring\fR] [\fIfile\fR]

+.\" .LP

+.\" red [-] [-sx] [-p \fIstring\fR] [\fIfile\fR]

+.SH DESCRIPTION

+.B ed

+is a line-oriented text editor.

+It is used to create, display, modify and otherwise manipulate text

+files.

+.\" .B red

+.\" is a restricted

+.\" .BR ed :

+.\" it can only edit files in the current

+.\" directory and cannot execute shell commands.

+If invoked with a

+.I file

+argument, then a copy of

+.I file

+is read into the editor's buffer.

+Changes are made to this copy and not directly to

+.I file

+itself.

+Upon quitting

+.BR ed ,

+any changes not explicitly saved  with a

+.I `w'

+command are lost.

+Editing is done in two distinct modes:

+.I command

+and

+.IR input .

+When first invoked,

+.B ed

+is in command mode.

+In this mode commands are read from the standard input and

+executed to manipulate the contents of the editor buffer.

+A typical command might look like:

+.sp

+.RS

+,s/\fIold\fR/\fInew\fR/g

+.RE

+.sp

+which replaces all occurrences of the string

+.I old

+with

+.IR new .

+When an input command, such as

+.I `a'

+(append),

+.I `i'

+(insert) or

+.I `c'

+(change), is given,

+.B ed

+enters input mode.  This is the primary means

+of adding text to a file.

+In this mode, no commands are available;

+instead, the standard input is written

+directly to the editor buffer.  Lines consist of text up to and

+including a

+.IR newline

+character.

+Input mode is terminated by

+entering a single period  (\fI.\fR) on a line.

+All

+.B ed

+commands operate on whole lines or ranges of lines; e.g.,

+the

+.I `d'

+command deletes lines; the

+.I `m'

+command moves lines, and so on.

+It is possible to modify only a portion of a line by means of replacement,

+as in the example above.  However even here, the

+.I `s'

+command is applied to whole lines at a time.

+In general,

+.B ed

+commands consist of zero or more line addresses, followed by a single

+character command and possibly additional parameters; i.e.,

+commands have the structure:

+.sp

+.RS

+.I [address [,address]]command[parameters]

+.RE

+.sp

+The address(es) indicate the line or range of lines to be affected by the

+command.  If fewer addresses are given than the command accepts, then

+default addresses are supplied.

+.SS OPTIONS

+.TP 8

+-s

+Suppresses diagnostics. This should be used if

+.BR ed 's

+standard input is from a script.

+.TP 8

+-x

+Prompts for an encryption key to be used in subsequent reads and writes

+(see the

+.I `x'

+command).

+.TP 8

+.RI \-p \ string

+Specifies a command prompt.  This may be toggled on and off with the

+.I `P'

+command.

+.TP 8

+.I file

+Specifies the name of a file to read.  If

+.I file

+is prefixed with a

+bang (!), then it is interpreted as a shell command.  In this case,

+what is read is

+the standard output of

+.I file

+executed via

+.IR sh (1).

+To read a file whose name begins with a bang, prefix the

+name with a backslash (\\).

+The default filename is set to

+.I file

+only if it is not prefixed with a bang.

+.SS LINE ADDRESSING

+An address represents the number of a line in the buffer.

+.B ed

+maintains a

+.I current address

+which is

+typically supplied to commands as the default address when none is specified.

+When a file is first read,  the current address is set to the last line

+of the file.  In general, the current address is set to the last line

+affected by a command.

+A line address is

+constructed from one of the bases in the list below, optionally followed

+by a numeric offset.  The offset may include any combination

+of digits, operators (i.e.,

+.IR + ,

+.I -

+and

+.IR ^ )

+and whitespace.

+Addresses are read from left to right, and their values are computed

+relative to the current address.

+One exception to the rule that addresses represent line numbers is the

+address

+.I 0

+(zero).

+This means "before the first line,"

+and is legal wherever it makes sense.

+An address range is two addresses separated either by a comma or

+semi-colon. The value of the first address in a range cannot exceed the

+value of the second.  If only one address is given in a range, then

+the second address is set to the given address.  If an

+.IR n- tuple

+of addresses is given where

+.I n > 2,

+then the corresponding range is determined by the last two addresses in

+the

+.IR n- tuple.

+If only one address is expected, then the last address is used.

+Each address in a comma-delimited range is interpreted relative to the

+current address.  In a semi-colon-delimited range, the first address is

+used to set the current address, and the second address is interpreted

+relative to the first.

+The following address symbols are recognized.

+.TP 8

+\&.

+The current line (address) in the buffer.

+.TP 8

+$

+The last line in the buffer.

+.TP 8

+n

+The

+.IR n th,

+line in the buffer

+where

+.I n

+is a number in the range

+.I [0,$].

+.TP 8

+- or ^

+The previous line.

+This is equivalent to

+.I -1

+and may be repeated with cumulative effect.

+.TP 8

+-\fIn\fR or ^\fIn\fR

+The

+.IR n th

+previous line, where

+.I n

+is a non-negative number.

+.TP 8

++

+The

+next line.

+This is equivalent to

+.I +1

+and may be repeated with cumulative effect.

+.TP 8

++\fIn\fR or whitespace\fIn\fR

+The

+.IR n th

+next line, where

+.I n

+is a non-negative number.

+.I whitespace

+followed by a number

+.I n

+is interpreted as

+.IR +n .

+.TP 8

+, \fRor\fB %

+The first through last lines in the buffer.  This is equivalent to

+the address range

+.I 1,$.

+.TP 8

+;

+The

+current through last lines in the buffer.  This is equivalent to

+the address range

+.I .,$.

+.TP 8

+.RI / re/

+The

+next line containing the regular expression

+.IR re .

+The search wraps to the beginning of the buffer and continues down to the

+current line, if necessary.

+// repeats the last search.

+.TP 8

+.RI ? re?

+The

+previous line containing the regular expression

+.IR re .

+The search wraps to the end of the buffer and continues up to the

+current line, if necessary.

+?? repeats the last search.

+.TP 8

+.RI \' lc

+The

+line previously marked by a

+.I `k'

+(mark) command, where

+.I lc

+is a lower case letter.

+.SS REGULAR EXPRESSIONS

+Regular expressions are patterns used in selecting text.

+For example, the

+.B ed

+command

+.sp

+.RS

+g/\fIstring\fR/

+.RE

+.sp

+prints all lines containing

+.IR string .

+Regular expressions are also

+used by the

+.I `s'

+command for selecting old text to be replaced with new.

+In addition to a specifying string literals, regular expressions can

+represent

+classes of strings.  Strings thus represented are said to be matched

+by the corresponding regular expression.

+If it is possible for a regular expression

+to match several strings in a line, then the left-most longest match is

+the one selected.

+The following symbols are used in constructing regular expressions:

+.TP 8

+c

+Any character

+.I c

+not listed below, including `{', '}', `(', `)', `<' and `>',

+matches itself.

+.TP 8

+\fR\e\fIc\fR

+Any backslash-escaped character

+.IR c ,

+except for `{', '}', `(', `)', `<' and `>',

+matches itself.

+.TP 8

+\fR.\fR

+Matches any single character.

+.TP 8

+.I [char-class]

+Matches any single character in

+.IR char-class .

+To include a  `]'

+in

+.IR char-class ,

+it must be the first character.

+A range of characters may be specified by separating the end characters

+of the range with a `-', e.g., `a-z' specifies the lower case characters.

+The following literal expressions can also be used in

+.I char-class

+to specify sets of characters:

+.sp

+\ \ [:alnum:]\ \ [:cntrl:]\ \ [:lower:]\ \ [:space:]

+.PD 0

+\ \ [:alpha:]\ \ [:digit:]\ \ [:print:]\ \ [:upper:]

+.PD 0

+\ \ [:blank:]\ \ [:graph:]\ \ [:punct:]\ \ [:xdigit:]

+.sp

+If `-' appears as the first or last

+character of

+.IR char-class ,

+then it matches itself.

+All other characters in

+.I char-class

+match themselves.

+.sp

+Patterns in

+.I char-class

+of the form:

+.sp

+\ \ [.\fIcol-elm\fR.] or,

+.PD 0

+\ \ [=\fIcol-elm\fR=]

+.sp

+where

+.I col-elm

+is a

+.I collating element

+are interpreted according to

+.IR locale (5)

+(not currently supported).

+See

+.IR regex (3)

+for an explanation of these constructs.

+.TP 8

+[^\fIchar-class\fR]

+Matches any single character, other than newline, not in

+.IR char-class .

+.IR char-class

+is defined

+as above.

+.TP 8

+^

+If `^' is the first character of a regular expression, then it

+anchors the regular expression to the beginning of a line.

+Otherwise, it matches itself.

+.TP 8

+$

+If `$' is the last character of a regular expression, it

+anchors the regular expression to the end of a line.

+Otherwise, it matches itself.

+.TP 8

+\fR\e<\fR

+Anchors the single character regular expression or subexpression

+immediately following it to the beginning of a word.

+(This may not be available)

+.TP 8

+\fR\e>\fR

+Anchors the single character regular expression or subexpression

+immediately following it to the end of a word.

+(This may not be available)

+.TP 8

+\fR\e(\fIre\fR\e)\fR

+Defines a subexpression

+.IR re .

+Subexpressions may be nested.

+A subsequent backreference of the form \fI`\en'\fR, where

+.I n

+is a number in the range [1,9], expands to the text matched by the

+.IR n th

+subexpression.

+For example, the regular expression `\e(.*\e)\e1' matches any string

+consisting of identical adjacent substrings.

+Subexpressions are ordered relative to

+their left delimiter.

+.TP 8

+*

+Matches the single character regular expression or subexpression

+immediately preceding it zero or more times.  If '*' is the first

+character of a regular expression or subexpression, then it matches

+itself.  The `*' operator sometimes yields unexpected results.

+For example, the regular expression `b*' matches the beginning of

+the string `abbb' (as opposed to the substring `bbb'), since a null match

+is the only left-most match.

+.TP 8

+\fR\e{\fIn,m\fR\e}\fR or \fR\e{\fIn,\fR\e}\fR or \fR\e{\fIn\fR\e}\fR

+Matches the single character regular expression or subexpression

+immediately preceding it at least

+.I n

+and at most

+.I m

+times.

+If

+.I m

+is omitted, then it matches at least

+.I n

+times.

+If the comma is also omitted, then it matches exactly

+.I n

+times.

+.LP

+Additional regular expression operators may be defined depending on the

+particular

+.IR regex (3)

+implementation.

+.SS COMMANDS

+All

+.B ed

+commands are single characters, though some require additonal parameters.

+If a command's parameters extend over several lines, then

+each line except for the last

+must be terminated with a backslash (\\).

+In general, at most one command is allowed per line.

+However, most commands accept a print suffix, which is any of

+.I `p'

+(print),

+.I `l'

+(list) ,

+or

+.I `n'

+(enumerate),

+to print the last line affected by the command.

+An interrupt (typically ^C) has the effect of aborting the current command

+and returning the editor to command mode.

+.B ed

+recognizes the following commands.  The commands are shown together with

+the default address or address range supplied if none is

+specified (in parenthesis).

+.TP 8

+(.)a

+Appends text to the buffer after the addressed line.

+Text is entered in input mode.

+The current address is set to last line entered.

+.TP 8

+(.,.)c

+Changes lines in the buffer.  The addressed lines are deleted

+from the buffer, and text is appended in their place.

+Text is entered in input mode.

+The current address is set to last line entered.

+.TP 8

+(.,.)d

+Deletes the addressed lines from the buffer.

+If there is a line after the deleted range, then the current address is set

+to this line. Otherwise the current address is set to the line

+before the deleted range.

+.TP 8

+.RI e \ file

+Edits

+.IR file ,

+and sets the default filename.

+If

+.I file

+is not specified, then the  default filename is used.

+Any lines in the buffer are deleted before

+the new file is read.

+The current address is set to the last line read.

+.TP 8

+.RI e \ !command

+Edits the standard output of

+.IR `!command' ,

+(see

+.RI ! command

+below).

+The default filename is unchanged.

+Any lines in the buffer are deleted before the output of

+.I command

+is read.

+The current address is set to the last line read.

+.TP 8

+.RI E \ file

+Edits

+.I file

+unconditionally.

+This is similar to the

+.I e

+command,

+except that unwritten changes are discarded without warning.

+The current address is set to the last line read.

+.TP 8

+.RI f \ file

+Sets the default filename to

+.IR file .

+If

+.I file

+is not specified, then the default unescaped filename is printed.

+.TP 8

+.RI (1,$)g /re/command-list

+Applies

+.I command-list

+to each of the addressed lines matching a regular expression

+.IR re .

+The current address is set to the

+line currently matched before

+.I command-list

+is executed.

+At the end of the

+.I `g'

+command, the current address is set to the last line affected by

+.IR command-list .

+Each command in

+.I command-list

+must be on a separate line,

+and every line except for the last must be terminated by a backslash

+(\\).

+Any commands are allowed, except for

+.IR `g' ,

+.IR `G' ,

+.IR `v' ,

+and

+.IR `V' .

+A newline alone in

+.I command-list

+is equivalent to a

+.I `p'

+command.

+.TP 8

+.RI (1,$)G /re/

+Interactively edits the addressed lines matching a regular expression

+.IR re.

+For each matching line,

+the line is printed,

+the current address is set,

+and the user is prompted to enter a

+.IR command-list .

+At the end of the

+.I `G'

+command, the current address

+is set to the last line affected by (the last)

+.IR command-list .

+The format of

+.I command-list

+is the same as that of the

+.I `g'

+command.  A newline alone acts as a null command list.

+A single `&' repeats the last non-null command list.

+.TP 8

+H

+Toggles the printing of error explanations.

+By default, explanations are not printed.

+It is recommended that ed scripts begin with this command to

+aid in debugging.

+.TP 8

+h

+Prints an explanation of the last error.

+.TP 8

+(.)i

+Inserts text in the buffer before the current line.

+Text is entered in input mode.

+The current address is set to the last line entered.

+.TP 8

+(.,.+1)j

+Joins the addressed lines.  The addressed lines are

+deleted from the buffer and replaced by a single

+line containing their joined text.

+The current address is set to the resultant line.

+.TP 8

+.RI (.)k lc

+Marks a line with a lower case letter

+.IR lc .

+The  line can then be addressed as

+.I 'lc

+(i.e., a single quote followed by

+.I lc

+) in subsequent commands.  The mark is not cleared until the line is

+deleted or otherwise modified.

+.TP 8

+(.,.)l

+Prints the addressed lines unambiguously.

+If a single line fills for than one screen (as might be the case

+when viewing a binary file, for instance), a `--More--'

+prompt is printed on the last line.

+.B ed

+waits until the RETURN key is pressed

+before displaying the next screen.

+The current address is set to the last line

+printed.

+.TP 8

+(.,.)m(.)

+Moves lines in the buffer.  The addressed lines are moved to after the

+right-hand destination address, which may be the address

+.IR 0

+(zero).

+The current address is set to the

+last line moved.

+.TP 8

+(.,.)n

+Prints the addressed lines along with

+their line numbers.  The current address is set to the last line

+printed.

+.TP 8

+(.,.)p

+Prints the addressed lines. The current address is set to the last line

+printed.

+.TP 8

+P

+Toggles the command prompt on and off.

+Unless a prompt was specified by with command-line option

+\fI-p string\fR, the command prompt is by default turned off.

+.TP 8

+q

+Quits ed.

+.TP 8

+Q

+Quits ed unconditionally.

+This is similar to the

+.I q

+command,

+except that unwritten changes are discarded without warning.

+.TP 8

+.RI ($)r \ file

+Reads

+.I file

+to after the addressed line.  If

+.I file

+is not specified, then the default

+filename is used.  If there was no default filename prior to the command,

+then the default filename is set to

+.IR file .

+Otherwise, the default filename is unchanged.

+The current address is set to the last line read.

+.TP 8

+.RI ($)r \ !command

+Reads

+to after the addressed line

+the standard output of

+.IR `!command' ,

+(see the

+.RI ! command

+below).

+The default filename is unchanged.

+The current address is set to the last line read.

+.HP

+.RI (.,.)s /re/replacement/

+.PD 0

+.HP

+.RI (.,.)s  /re/replacement/\fRg\fR

+.HP

+.RI (.,.)s  /re/replacement/n

+.br

+Replaces text in the addressed lines

+matching a regular expression

+.I re

+with

+.IR replacement .

+By default, only the first match in each line is replaced.

+If the

+.I `g'

+(global) suffix is given, then every match to be replaced.

+The

+.I `n'

+suffix, where

+.I n

+is a postive number, causes only the

+.IR n th

+match to be replaced.

+It is an error if no substitutions are performed on any of the addressed

+lines.

+The current address is set the last line affected.

+.I re

+and

+.I replacement

+may be delimited by any character other than space and newline

+(see the

+.I `s'

+command below).

+If one or two of the last delimiters is omitted, then the last line

+affected is printed as though the print suffix

+.I `p'

+were specified.

+An unescaped `&' in

+.I replacement

+is replaced by the currently matched text.

+The character sequence

+\fI`\em'\fR,

+where

+.I m

+is a number in the range [1,9], is replaced by the

+.IR m th

+backreference expression of the matched text.

+If

+.I replacement

+consists of a single `%', then

+.I replacement

+from the last substitution is used.

+Newlines may be embedded in

+.I replacement

+if they are escaped with a backslash (\\).

+.TP 8

+(.,.)s

+Repeats the last substitution.

+This form of the

+.I `s'

+command accepts a count suffix

+.IR `n' ,

+or any combination of the characters

+.IR `r' ,

+.IR `g' ,

+and

+.IR `p' .

+If a count suffix

+.I `n'

+is given, then only the

+.IR n th

+match is replaced.

+The

+.I `r'

+suffix causes

+the regular expression of the last search to be used instead of the

+that of the last substitution.

+The

+.I `g'

+suffix toggles the global suffix of the last substitution.

+The

+.I `p'

+suffix toggles the print suffix of the last substitution

+The current address is set to the last line affected.

+.TP 8

+(.,.)t(.)

+Copies (i.e., transfers) the addressed lines to after the right-hand

+destination address, which may be the address

+.IR 0

+(zero).

+The current address is set to the last line

+copied.

+.TP 8

+u

+Undoes the last command and restores the current address

+to what it was before the command.

+The global commands

+.IR `g' ,

+.IR `G' ,

+.IR `v' ,

+and

+.IR `V' .

+are treated as a single command by undo.

+.I `u'

+is its own inverse.

+.TP 8

+.RI (1,$)v /pat/command-list

+Applies

+.I command-list

+to each of the addressed lines not matching a regular expression

+.IR re .

+This is similar to the

+.I `g'

+command.

+.TP 8

+.RI (1,$)V /re/

+Interactively edits the addressed lines not matching a regular expression

+.IR re.

+This is similar to the

+.I `G'

+command.

+.TP 8

+.RI (1,$)w \ file

+Writes the addressed lines to

+.IR file .

+Any previous contents of

+.I file

+is lost without warning.

+If there is no default filename, then the default filename is set to

+.IR file,

+otherwise it is unchanged.  If no filename is specified, then the default

+filename is used.

+The current address is unchanged.

+.TP 8

+.RI (1,$)wq \ file

+Writes the addressed lines to

+.IR file ,

+and then executes a

+.I `q'

+command.

+.TP 8

+.RI (1,$)w \ !command

+Writes the addressed lines to the standard input of

+.IR `!command' ,

+(see the

+.RI ! command

+below).

+The default filename and current address are unchanged.

+.TP 8

+.RI (1,$)W \ file

+Appends the addressed lines to the end of

+.IR file .

+This is similar to the

+.I `w'

+command, expect that the previous contents of file is not clobbered.

+The current address is unchanged.

+.TP 8

+x

+Prompts for an encryption key which is used in subsequent reads and

+writes.  If a newline alone is entered as the key, then encryption is

+turned off.  Otherwise, echoing is disabled while a key is read.

+Encryption/decryption is done using the bdes(1) algorithm.

+.TP 8

+.RI (.+1)z n

+Scrolls

+.I n

+lines at a time starting at addressed line.  If

+.I n

+is not specified, then the current window size is used.

+The current address is set to the last line printed.

+.TP 8

+.RI ! command

+Executes

+.I command

+via

+.IR sh (1).

+If the first character of

+.I command

+is `!', then it is replaced by text of the

+previous

+.IR `!command' .

+.B ed

+does not process

+.I command

+for backslash (\\) escapes.

+However, an unescaped

+.I `%'

+is replaced by the default filename.

+When the shell returns from execution, a `!'

+is printed to the standard output.

+The current line is unchanged.

+.TP 8

+($)=

+Prints the line number of the addressed line.

+.TP 8

+(.+1)newline

+Prints the addressed line, and sets the current address to

+that line.

+.SH FILES

+.TP 20

+/tmp/ed.*

+Buffer file

+.PD 0

+.TP 20

+ed.hup

+The file to which

+.B ed

+attempts to write the  buffer if the terminal hangs up.

+.SH SEE ALSO

+.IR vi (1),

+.IR sed (1),

+.IR regex (3),

+.IR bdes (1),

+.IR sh (1).

+USD:12-13

+B. W. Kernighan and P. J. Plauger,

+.I Software Tools in Pascal ,

+Addison-Wesley, 1981.

+.SH LIMITATIONS

+.B ed

+processes

+.I file

+arguments for backslash escapes, i.e.,  in a filename,

+any characters preceded by a backslash (\\) are

+interpreted literally.

+If a text (non-binary) file is not terminated by a newline character,

+then

+.B ed

+appends one on reading/writing it.  In the case of a binary file,

+.B ed

+does not append a newline on reading/writing.

+per line overhead: 4 ints

+.SH DIAGNOSTICS

+When an error occurs,

+.B ed

+prints a `?' and either returns to command mode

+or exits if its input is from a script.

+An explanation of the last error can be

+printed with the

+.I `h'

+(help) command.

+Since the

+.I `g'

+(global) command  masks any errors from failed searches and substitutions,

+it can be used to perform conditional operations in scripts; e.g.,

+.sp

+.RS

+g/\fIold\fR/s//\fInew\fR/

+.RE

+.sp

+replaces any occurrences of

+.I old

+with

+.IR new .

+If the

+.I `u'

+(undo) command occurs in a global command list, then

+the command list is executed only once.

+If diagnostics are not disabled, attempting to quit

+.B ed

+or edit another file before writing a modified buffer

+results in an error.

+If the command is entered a second time, it succeeds,

+but any changes to the buffer are lost.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t11.r

@@ -1,0 +1,908 @@

+.\"	$OpenBSD: t11.2,v 1.1 2003/07/21 20:16:21 otto Exp $

+.\"

+.Dd May 2, 1993

+.Dt ED 1

+.Os

+.Sh NAME

+.Nm ed

+.Nd text editor

+.Sh SYNOPSIS

+.Nm ed

+.Op Fl

+.Op Fl sx

+.Op Fl p Ar string

+.Op Ar file

+.Sh DESCRIPTION

+.Nm

+is a line-oriented text editor.

+It is used to create, display, modify, and otherwise manipulate text files.

+If invoked with a

+.Ar file

+argument, then a copy of

+.Ar file

+is read into the editor's buffer.

+Changes are made to this copy and not directly to

+.Ar file

+itself.

+Upon quitting

+.Nm ed ,

+any changes not explicitly saved with a

+.Em w

+command are lost.

+.Pp

+Editing is done in two distinct modes:

+.Em command

+and

+.Em input .

+When first invoked,

+.Nm

+is in command mode.

+In this mode, commands are read from the standard input and

+executed to manipulate the contents of the editor buffer.

+.Pp

+A typical command might look like:

+.Bd -literal -offset indent

+,s/old/new/g

+.Ed

+.Pp

+which replaces all occurrences of the string

+.Pa old

+with

+.Pa new .

+.Pp

+When an input command, such as

+.Em a

+(append),

+.Em i

+(insert),

+or

+.Em c

+(change) is given,

+.Nm

+enters input mode.

+This is the primary means of adding text to a file.

+In this mode, no commands are available;

+instead, the standard input is written directory to the editor buffer.

+Lines consist of text up to and including a newline character.

+Input mode is terminated by entering a single period

+.Pq Ql \&.

+on a line.

+.Pp

+All

+.Nm

+commands operate on whole lines or ranges of lines; e.g.,

+the

+.Em d

+command deletes lines; the

+.Em m

+command moves lines, and so on.

+It is possible to modify only a portion of a line by means of replacement,

+as in the example above.

+However, even here, the

+.Em s

+command is applied to whole lines at a time.

+.Pp

+In general,

+.Nm

+commands consist of zero or more line addresses, followed by a single

+character command and possibly additional parameters; i.e.,

+commands have the structure:

+.Bd -literal -offset indent

+[address [,address]]command[parameters]

+.Ed

+.Pp

+The address(es) indicate the line or range of lines to be affected by the

+command.

+If fewer addresses are given than the command accepts, then

+default addresses are supplied.

+.Pp

+The options are as follows:

+.Bl -tag -width Ds

+.It Fl

+Same as the

+.Fl s

+option (deprecated).

+.It Fl s

+Suppress diagnostics.

+This should be used if

+.Nm

+standard input is from a script.

+.Fl s

+flag.

+.It Fl x

+Prompt for an encryption key to be used in subsequent reads and writes

+(see the

+.Em x

+command).

+.It Fl p Ar string

+Specifies a command prompt.

+This may be toggled on and off with the

+.Em P

+command.

+.It Ar file

+Specifies the name of a file to read.

+If

+.Ar file

+is prefixed with a

+bang

+.Pq Ql \&! ,

+then it is interpreted as a shell command.

+In this case, what is read is the standard output of

+.Ar file

+executed via

+.Xr sh 1 .

+To read a file whose name begins with a bang, prefix the

+name with a backslash

+.Pq Ql \e .

+The default filename is set to

+.Ar file

+only if it is not prefixed with a bang.

+.El

+.Ss LINE ADDRESSING

+An address represents the number of a line in the buffer.

+.Nm

+maintains a

+.Em current address

+which is typically supplied to commands as the default address

+when none is specified.

+When a file is first read, the current address is set to the last line

+of the file.

+In general, the current address is set to the last line affected by a command.

+.Pp

+A line address is

+constructed from one of the bases in the list below, optionally followed

+by a numeric offset.

+The offset may include any combination of digits, operators (i.e.,

+.Em + ,

+.Em - ,

+and

+.Em ^ ) ,

+and whitespace.

+Addresses are read from left to right, and their values are computed

+relative to the current address.

+.Pp

+One exception to the rule that addresses represent line numbers is the

+address

+.Em 0

+(zero).

+This means

+.Dq before the first line ,

+and is legal wherever it makes sense.

+.Pp

+An address range is two addresses separated either by a comma or semi-colon.

+The value of the first address in a range cannot exceed the

+value of the second.

+If only one address is given in a range,

+then the second address is set to the given address.

+If an

+.Em n Ns No -tuple

+of addresses is given where

+.Em n > 2 ,

+then the corresponding range is determined by the last two addresses in the

+.Em n Ns No -tuple.

+If only one address is expected, then the last address is used.

+.Pp

+Each address in a comma-delimited range is interpreted relative to the

+current address.

+In a semi-colon-delimited range, the first address is

+used to set the current address, and the second address is interpreted

+relative to the first.

+.Pp

+The following address symbols are recognized:

+.Bl -tag -width Ds

+.It Em \&.

+The current line (address) in the buffer.

+.It Em $

+The last line in the buffer.

+.It Em n

+The

+.Em n Ns No th

+line in the buffer where

+.Em n

+is a number in the range

+.Em [0,$] .

+.It Em - No or Em ^

+The previous line.

+This is equivalent to

+.Em -1

+and may be repeated with cumulative effect.

+.It Em -n No or Em ^n

+The

+.Em n Ns No th

+previous line, where

+.Em n

+is a non-negative number.

+.It Em +

+The next line.

+This is equivalent to

+.Em +1

+and may be repeated with cumulative effect.

+.It Em +n

+The

+.Em n Ns No th

+next line, where

+.Em n

+is a non-negative number.

+.It Em \&, No or Em %

+The first through last lines in the buffer.

+This is equivalent to the address range

+.Em 1,$ .

+.It Em \&;

+The current through last lines in the buffer.

+This is equivalent to the address range

+.Em .,$ .

+.It Em / Ns No re Ns Em /

+The next line containing the regular expression

+.Em re .

+The search wraps to the beginning of the buffer and continues down to the

+current line, if necessary.

+.Em //

+repeats the last search.

+.It Em ? Ns No re Ns Em ?

+The previous line containing the regular expression

+.Em re .

+The search wraps to the end of the buffer and continues up to the

+current line, if necessary.

+.Em ??

+repeats the last search.

+.It Em \&\' Ns No lc

+The line previously marked by a

+.Em k

+(mark) command, where

+.Em lc

+is a lower case letter.

+.El

+.Ss REGULAR EXPRESSIONS

+Regular expressions are patterns used in selecting text.

+For example, the

+.Nm

+command

+.Bd -literal -offset indent

+g/string/

+.Ed

+.Pp

+prints all lines containing

+.Em string .

+Regular expressions are also used by the

+.Em s

+command for selecting old text to be replaced with new.

+.Pp

+In addition to a specifying string literals, regular expressions can

+represent classes of strings.

+Strings thus represented are said to be matched by the

+corresponding regular expression.

+If it is possible for a regular expression to match several strings in

+a line, then the leftmost longest match is the one selected.

+.Pp

+The following symbols are used in constructing regular expressions:

+.Bl -tag -width Dsasdfsd

+.It Em c

+Any character

+.Em c

+not listed below, including

+.Em { Ns No ,

+.Em } Ns No ,

+.Em \&( Ns No ,

+.Em \&) Ns No ,

+.Em < Ns No ,

+and

+.Em >

+matches itself.

+.It Em \ec

+Any backslash-escaped character

+.Em c Ns No ,

+except for

+.Em { Ns No ,

+.Em } Ns No ,

+.Em \&( Ns No ,

+.Em \&) Ns No ,

+.Em < Ns No , and

+.Em >

+matches itself.

+.It Em \&.

+Matches any single character.

+.It Em [char-class]

+Matches any single character in

+.Em char-class .

+To include a

+.Ql \&]

+in

+.Em char-class Ns No ,

+it must be the first character.

+A range of characters may be specified by separating the end characters

+of the range with a

+.Ql - ;

+e.g.,

+.Em a-z

+specifies the lower case characters.

+The following literal expressions can also be used in

+.Em char-class

+to specify sets of characters:

+.Pp

+.Em \ \ [:alnum:]\ \ [:cntrl:]\ \ [:lower:]\ \ [:space:]

+.Em \ \ [:alpha:]\ \ [:digit:]\ \ [:print:]\ \ [:upper:]

+.Em \ \ [:blank:]\ \ [:graph:]\ \ [:punct:]\ \ [:xdigit:]

+.Pp

+If

+.Ql -

+appears as the first or last character of

+.Em char-class Ns No ,

+then it matches itself.

+All other characters in

+.Em char-class

+match themselves.

+.Pp

+Patterns in

+.Em char-class

+of the form

+.Em [.col-elm.] No or Em [=col-elm=]

+where

+.Em col-elm

+is a collating element are interpreted according to

+.Xr locale 5

+(not currently supported).

+See

+.Xr regex 3

+for an explanation of these constructs.

+.It Em [^char-class]

+Matches any single character, other than newline, not in

+.Em char-class Ns No .

+.Em char-class

+is defined as above.

+.It Em ^

+If

+.Em ^

+is the first character of a regular expression, then it

+anchors the regular expression to the beginning of a line.

+Otherwise, it matches itself.

+.It Em $

+If

+.Em $

+is the last character of a regular expression,

+it anchors the regular expression to the end of a line.

+Otherwise, it matches itself.

+.It Em \e<

+Anchors the single character regular expression or subexpression

+immediately following it to the beginning of a word.

+(This may not be available.)

+.It Em \e>

+Anchors the single character regular expression or subexpression

+immediately following it to the end of a word.

+(This may not be available.)

+.It Em \e( Ns No re Ns Em \e)

+Defines a subexpression

+.Em re .

+Subexpressions may be nested.

+A subsequent backreference of the form

+.Em \en Ns No ,

+where

+.Em n

+is a number in the range [1,9], expands to the text matched by the

+.Em n Ns No th

+subexpression.

+For example, the regular expression

+.Em \e(.*\e)\e1

+matches any string consisting of identical adjacent substrings.

+Subexpressions are ordered relative to their left delimiter.

+.It Em *

+Matches the single character regular expression or subexpression

+immediately preceding it zero or more times.

+If

+.Em *

+is the first character of a regular expression or subexpression,

+then it matches itself.

+The

+.Em *

+operator sometimes yields unexpected results.

+For example, the regular expression

+.Em b*

+matches the beginning of the string

+.Em abbb

+(as opposed to the substring

+.Em bbb Ns No ),

+since a null match is the only leftmost match.

+.Sm off

+.It Xo Em \e{ No n,m

+.Em \e}\ \e{ No n, Em \e}\

+.Em \e{ No n Em \e}

+.Xc

+.Sm on

+Matches the single character regular expression or subexpression

+immediately preceding it at least

+.Em n

+and at most

+.Em m

+times.

+If

+.Em m

+is omitted, then it matches at least

+.Em n

+times.

+If the comma is also omitted, then it matches exactly

+.Em n

+times.

+.El

+.Pp

+Additional regular expression operators may be defined depending on the

+particular

+.Xr regex 3

+implementation.

+.Ss COMMANDS

+All

+.Nm

+commands are single characters, though some require additional parameters.

+If a command's parameters extend over several lines, then

+each line except for the last must be terminated with a backslash

+.Pq Ql \e .

+.Pp

+In general, at most one command is allowed per line.

+However, most commands accept a print suffix, which is any of

+.Em p No (print),

+.Em l No (list),

+or

+.Em n No (enumerate),

+to print the last line affected by the command.

+.Pp

+An interrupt (typically ^C) has the effect of aborting the current command

+and returning the editor to command mode.

+.Pp

+.Nm

+recognizes the following commands.

+The commands are shown together with

+the default address or address range supplied if none is

+specified (in parentheses), and other possible arguments on the right.

+.Bl -tag -width Dxxs

+.It (.) Ns Em a

+Appends text to the buffer after the addressed line.

+Text is entered in input mode.

+The current address is set to last line entered.

+.It (.,.) Ns Em c

+Changes lines in the buffer.

+The addressed lines are deleted from the buffer,

+and text is appended in their place.

+Text is entered in input mode.

+The current address is set to last line entered.

+.It (.,.) Ns Em d

+Deletes the addressed lines from the buffer.

+If there is a line after the deleted range, then the current address is set

+to this line.

+Otherwise the current address is set to the line before the deleted range.

+.It Em e No file

+Edits

+.Em file Ns No ,

+and sets the default filename.

+If

+.Em file

+is not specified, then the default filename is used.

+Any lines in the buffer are deleted before the new file is read.

+The current address is set to the last line read.

+.It Em e No !command

+Edits the standard output of

+.Em !command Ns No ,

+(see

+.Em ! No command

+below).

+The default filename is unchanged.

+Any lines in the buffer are deleted before the output of

+.Em command

+is read.

+The current address is set to the last line read.

+.It Em E No file

+Edits

+.Em file

+unconditionally.

+This is similar to the

+.Em e

+command, except that unwritten changes are discarded without warning.

+The current address is set to the last line read.

+.It Em f No file

+Sets the default filename to

+.Em file Ns No .

+If

+.Em file

+is not specified, then the default unescaped filename is printed.

+.It (1,$) Ns Em g Ns No /re/command-list

+Applies

+.Em command-list

+to each of the addressed lines matching a regular expression

+.Em re Ns No .

+The current address is set to the line currently matched before

+.Em command-list

+is executed.

+At the end of the

+.Em g

+command, the current address is set to the last line affected by

+.Em command-list Ns No .

+.Pp

+Each command in

+.Em command-list

+must be on a separate line,

+and every line except for the last must be terminated by

+.Em \e No (backslash).

+Any commands are allowed, except for

+.Em g Ns No ,

+.Em G Ns No ,

+.Em v Ns No ,

+and

+.Em V Ns No .

+A newline alone in

+.Em command-list

+is equivalent to a

+.Em p

+command.

+.It (1,$) Ns Em G Ns No /re/

+Interactively edits the addressed lines matching a regular expression

+.Em re Ns No .

+For each matching line, the line is printed, the current address is set,

+and the user is prompted to enter a

+.Em command-list Ns No .

+At the end of the

+.Em g

+command, the current address is set to the last line affected by (the last)

+.Em command-list Ns No .

+.Pp

+The format of

+.Em command-list

+is the same as that of the

+.Em g

+command.

+A newline alone acts as a null command list.

+A single

+.Em &

+repeats the last non-null command list.

+.It Em H

+Toggles the printing of error explanations.

+By default, explanations are not printed.

+It is recommended that

+.Nm

+scripts begin with this command to aid in debugging.

+.It Em h

+Prints an explanation of the last error.

+.It (.) Ns Em i

+Inserts text in the buffer before the current line.

+Text is entered in input mode.

+The current address is set to the last line entered.

+.It (.,.+1) Ns Em j

+Joins the addressed lines.

+The addressed lines are deleted from the buffer and replaced by a single

+line containing their joined text.

+The current address is set to the resultant line.

+.It (.) Ns Em klc

+Marks a line with a lower case letter

+.Em lc Ns No \&.

+The line can then be addressed as

+.Em \&'lc

+(i.e., a single quote followed by

+.Em lc Ns No )

+in subsequent commands.

+The mark is not cleared until the line is deleted or otherwise modified.

+.It (.,.) Ns Em l

+Prints the addressed lines unambiguously.

+If a single line fills more than one screen (as might be the case

+when viewing a binary file, for instance), a

+.Dq --More--

+prompt is printed on the last line.

+.Nm

+waits until the RETURN key is pressed before displaying the next screen.

+The current address is set to the last line printed.

+.It (.,.) Ns Em m Ns No (.)

+Moves lines in the buffer.

+The addressed lines are moved to after the

+right-hand destination address, which may be the address

+.Em 0

+(zero).

+The current address is set to the last line moved.

+.It (.,.) Ns Em n

+Prints the addressed lines along with their line numbers.

+The current address is set to the last line printed.

+.It (.,.) Ns Em p

+Prints the addressed lines.

+The current address is set to the last line printed.

+.It Em P

+Toggles the command prompt on and off.

+Unless a prompt was specified by with command-line option

+.Fl p Ar string Ns No ,

+the command prompt is by default turned off.

+.It Em q

+Quits

+.Nm ed .

+.It Em Q

+Quits

+.Nm

+unconditionally.

+This is similar to the

+.Em q

+command, except that unwritten changes are discarded without warning.

+.It ($) Ns Em r No file

+Reads

+.Em file

+to after the addressed line.

+If

+.Em file

+is not specified, then the default filename is used.

+If there was no default filename prior to the command,

+then the default filename is set to

+.Em file Ns No .

+Otherwise, the default filename is unchanged.

+The current address is set to the last line read.

+.It ($) Ns Em r No !command

+Reads to after the addressed line the standard output of

+.Em !command Ns No ,

+(see the

+.Em !

+command below).

+The default filename is unchanged.

+The current address is set to the last line read.

+.Sm off

+.It Xo (.,.) Em s No /re/replacement/ , \ (.,.)

+.Em s No /re/replacement/ Em g , No \ (.,.)

+.Em s No /re/replacement/ Em n

+.Xc

+.Sm on

+Replaces text in the addressed lines matching a regular expression

+.Em re

+with

+.Em replacement Ns No .

+By default, only the first match in each line is replaced.

+If the

+.Em g

+(global) suffix is given, then every match to be replaced.

+The

+.Em n

+suffix, where

+.Em n

+is a positive number, causes only the

+.Em n Ns No th

+match to be replaced.

+It is an error if no substitutions are performed on any of the addressed

+lines.

+The current address is set the last line affected.

+.Pp

+.Em re

+and

+.Em replacement

+may be delimited by any character other than space and newline

+(see the

+.Em s

+command below).

+If one or two of the last delimiters is omitted, then the last line

+affected is printed as though the print suffix

+.Em p

+were specified.

+.Pp

+An unescaped

+.Ql \e

+in

+.Em replacement

+is replaced by the currently matched text.

+The character sequence

+.Em \em Ns No ,

+where

+.Em m

+is a number in the range [1,9], is replaced by the

+.Em m Ns No th

+backreference expression of the matched text.

+If

+.Em replacement

+consists of a single

+.Ql % ,

+then

+.Em replacement

+from the last substitution is used.

+Newlines may be embedded in

+.Em replacement

+if they are escaped with a backslash

+.Pq Ql \e .

+.It (.,.) Ns Em s

+Repeats the last substitution.

+This form of the

+.Em s

+command accepts a count suffix

+.Em n Ns No ,

+or any combination of the characters

+.Em r Ns No ,

+.Em g Ns No ,

+and

+.Em p Ns No .

+If a count suffix

+.Em n

+is given, then only the

+.Em n Ns No th

+match is replaced.

+The

+.Em r

+suffix causes

+the regular expression of the last search to be used instead of the

+that of the last substitution.

+The

+.Em g

+suffix toggles the global suffix of the last substitution.

+The

+.Em p

+suffix toggles the print suffix of the last substitution

+The current address is set to the last line affected.

+.It (.,.) Ns Em t Ns No (.)

+Copies (i.e., transfers) the addressed lines to after the right-hand

+destination address, which may be the address

+.Em 0

+(zero).

+The current address is set to the last line copied.

+.It Em u

+Undoes the last command and restores the current address

+to what it was before the command.

+The global commands

+.Em g Ns No ,

+.Em G Ns No ,

+.Em v Ns No ,

+and

+.Em V Ns No .

+are treated as a single command by undo.

+.Em u

+is its own inverse.

+.It (1,$) Ns Em v Ns No /re/command-list

+Applies

+.Em command-list

+to each of the addressed lines not matching a regular expression

+.Em re Ns No .

+This is similar to the

+.Em g

+command.

+.It (1,$) Ns Em V Ns No /re/

+Interactively edits the addressed lines not matching a regular expression

+.Em re Ns No .

+This is similar to the

+.Em G

+command.

+.It (1,$) Ns Em w No file

+Writes the addressed lines to

+.Em file Ns No .

+Any previous contents of

+.Em file

+is lost without warning.

+If there is no default filename, then the default filename is set to

+.Em file Ns No ,

+otherwise it is unchanged.

+If no filename is specified, then the default filename is used.

+The current address is unchanged.

+.It (1,$) Ns Em wq No file

+Writes the addressed lines to

+.Em file Ns No ,

+and then executes a

+.Em q

+command.

+.It (1,$) Ns Em w No !command

+Writes the addressed lines to the standard input of

+.Em !command Ns No ,

+(see the

+.Em !

+command below).

+The default filename and current address are unchanged.

+.It (1,$) Ns Em W No file

+Appends the addressed lines to the end of

+.Em file Ns No .

+This is similar to the

+.Em w

+command, expect that the previous contents of file is not clobbered.

+The current address is unchanged.

+.It Em x

+Prompts for an encryption key which is used in subsequent reads and writes.

+If a newline alone is entered as the key, then encryption is turned off.

+Otherwise, echoing is disabled while a key is read.

+Encryption/decryption is done using the

+.Xr bdes 1

+algorithm.

+.It (.+1) Ns Em z Ns No n

+Scrolls

+.Em n

+lines at a time starting at addressed line.

+If

+.Em n

+is not specified, then the current window size is used.

+The current address is set to the last line printed.

+.It ($) Ns Em =

+Prints the line number of the addressed line.

+.It (.+1) Ns Em newline

+Prints the addressed line, and sets the current address to that line.

+.It Em ! Ns No command

+Executes

+.Em command

+via

+.Xr sh 1 .

+If the first character of

+.Em command

+is

+.Em ! Ns No ,

+then it is replaced by text of the previous

+.Em !command Ns No .

+.Nm

+does not process

+.Em command

+for

+.Em \e

+(backslash) escapes.

+However, an unescaped

+.Em %

+is replaced by the default filename.

+When the shell returns from execution, a

+.Em !

+is printed to the standard output.

+The current line is unchanged.

+.El

+.Sh LIMITATIONS

+.Nm

+processes

+.Em file

+arguments for backslash escapes, i.e., in a filename,

+any characters preceded by a backslash

+.Pq Ql \e

+are interpreted literally.

+.Pp

+If a text (non-binary) file is not terminated by a newline character,

+then

+.Nm

+appends one on reading/writing it.

+In the case of a binary file,

+.Nm

+does not append a newline on reading/writing.

+.Sh DIAGNOSTICS

+When an error occurs,

+.Nm

+prints a

+.Dq ?

+and either returns to command mode or exits if its input is from a script.

+An explanation of the last error can be printed with the

+.Em h

+(help) command.

+.Pp

+Since the

+.Em g

+(global) command masks any errors from failed searches and substitutions,

+it can be used to perform conditional operations in scripts; e.g.,

+.Bd -literal -offset indent

+g/old/s//new/

+.Ed

+.Pp

+replaces any occurrences of

+.Em old

+with

+.Em new Ns No .

+.Pp

+If the

+.Em u

+(undo) command occurs in a global command list, then

+the command list is executed only once.

+.Pp

+If diagnostics are not disabled, attempting to quit

+.Nm

+or edit another file before writing a modified buffer results in an error.

+If the command is entered a second time, it succeeds,

+but any changes to the buffer are lost.

+.Sh FILES

+.Bl -tag -width /tmp/ed.* -compact

+.It Pa /tmp/ed.*

+buffer file

+.It Pa ed.hup

+where

+.Nm

+attempts to write the buffer if the terminal hangs up

+.El

+.Sh SEE ALSO

+.Xr bdes 1 ,

+.Xr sed 1 ,

+.Xr sh 1 ,

+.Xr vi 1 ,

+.Xr regex 3

+.Pp

+USD:12-13

+.Rs

+.%A B. W. Kernighan

+.%A P. J. Plauger

+.%B Software Tools in Pascal

+.%O Addison-Wesley

+.%D 1981

+.Re

+.Sh HISTORY

+An

+.Nm

+command appeared in

+.At v1 .

--- a/sys/src/cmd/diff/test/diff-t12.1

+++ /dev/null

@@ -1,10 +1,0 @@

-# Test HMAC:

-PROG=		hmactest

-SRCS=		hash.c hmactest.c

-.PATH:		${.CURDIR}/../../

-NOMAN=

-CFLAGS+=	-I${.CURDIR}/../../ -Wall

-DEBUG=		-g

-.include <bsd.prog.mk>

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t12.2

+++ /dev/null

@@ -1,12 +1,0 @@

-#	$OpenBSD: t12.2,v 1.1 2003/07/21 20:16:21 otto Exp $

-# Test HMAC:

-PROG=		hmactest

-SRCS=		hash.c hmactest.c

-.PATH:		${.CURDIR}/../../

-NOMAN=

-CFLAGS+=	-I${.CURDIR}/../../ -Wall

-DEBUG=		-g

-.include <bsd.prog.mk>

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t12.expected

+++ b/sys/src/cmd/diff/test/diff-t12.expected

@@ -1,5 +1,5 @@

---- diff-t12.1

-+++ diff-t12.2

+--- diff-t12.l

++++ diff-t12.r

 @@ -1,3 +1,5 @@

 +#	$OpenBSD: t12.2,v 1.1 2003/07/21 20:16:21 otto Exp $

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t12.l

@@ -1,0 +1,10 @@

+# Test HMAC:

+PROG=		hmactest

+SRCS=		hash.c hmactest.c

+.PATH:		${.CURDIR}/../../

+NOMAN=

+CFLAGS+=	-I${.CURDIR}/../../ -Wall

+DEBUG=		-g

+.include <bsd.prog.mk>

\ No newline at end of file

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t12.r

@@ -1,0 +1,12 @@

+#	$OpenBSD: t12.2,v 1.1 2003/07/21 20:16:21 otto Exp $

+# Test HMAC:

+PROG=		hmactest

+SRCS=		hash.c hmactest.c

+.PATH:		${.CURDIR}/../../

+NOMAN=

+CFLAGS+=	-I${.CURDIR}/../../ -Wall

+DEBUG=		-g

+.include <bsd.prog.mk>

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t13.1

+++ /dev/null

@@ -1,11 +1,0 @@

-A line of text

-.

-Another line of text

-..

-A third line

-...

-A fourth line

-.

-We keep counting

-.

-.

--- a/sys/src/cmd/diff/test/diff-t13.2

+++ /dev/null

@@ -1,9 +1,0 @@

-A line of text

-Another line of text

-..

-.

-A third line

-...

-..

-We keep counting

-.

--- a/sys/src/cmd/diff/test/diff-t13.expected

+++ b/sys/src/cmd/diff/test/diff-t13.expected

@@ -1,5 +1,5 @@

---- diff-t13.1

-+++ diff-t13.2

+--- diff-t13.l

++++ diff-t13.r

 @@ -1,11 +1,9 @@

  A line of text

-.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t13.l

@@ -1,0 +1,11 @@

+A line of text

+.

+Another line of text

+..

+A third line

+...

+A fourth line

+.

+We keep counting

+.

+.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t13.r

@@ -1,0 +1,9 @@

+A line of text

+Another line of text

+..

+.

+A third line

+...

+..

+We keep counting

+.

--- a/sys/src/cmd/diff/test/diff-t14.1

+++ /dev/null

@@ -1,2 +1,0 @@

-1

-2

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t14.2

+++ /dev/null

@@ -1,3 +1,0 @@

-1

-2

-3

--- a/sys/src/cmd/diff/test/diff-t14.expected

+++ b/sys/src/cmd/diff/test/diff-t14.expected

@@ -1,5 +1,5 @@

---- diff-t14.1

-+++ diff-t14.2

+--- diff-t14.l

++++ diff-t14.r

 @@ -1,2 +1,3 @@

-2

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t14.l

@@ -1,0 +1,2 @@

+1

+2

\ No newline at end of file

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t14.r

@@ -1,0 +1,3 @@

+1

+2

+3

--- a/sys/src/cmd/diff/test/diff-t15.1

+++ /dev/null

@@ -1,3 +1,0 @@

-1

-2

-3

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t15.2

+++ /dev/null

@@ -1,2 +1,0 @@

-1

-2

--- a/sys/src/cmd/diff/test/diff-t15.expected

+++ b/sys/src/cmd/diff/test/diff-t15.expected

@@ -1,5 +1,5 @@

---- diff-t15.1

-+++ diff-t15.2

+--- diff-t15.l

++++ diff-t15.r

 @@ -1,3 +1,2 @@

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t15.l

@@ -1,0 +1,3 @@

+1

+2

+3

\ No newline at end of file

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t15.r

@@ -1,0 +1,2 @@

+1

+2

--- a/sys/src/cmd/diff/test/diff-t2.1

+++ /dev/null

@@ -1,25 +1,0 @@

-Below is an example license to be used for new code in OpenBSD,

-modeled after the ISC license.

-It is important to specify the year of the copyright.  Additional years

-should be separated by a comma, e.g.

-    Copyright (c) 2003, 2004

-If you add extra text to the body of the license, be careful not to

-add further restrictions.

-/*

- * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

- *

- * Permission to use, copy, modify, and distribute this software for any

- * purpose with or without fee is hereby granted, provided that the above

- * copyright notice and this permission notice appear in all copies.

- *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

- */

--- a/sys/src/cmd/diff/test/diff-t2.2

+++ /dev/null

@@ -1,25 +1,0 @@

-Below is an example license to be used for new code in OpenBSD,

-modeled after the ISC license.

-It is important to specify the year of the copyright.  Additional years

-should be separated by a comma, e.g.

-    Copyright (c) 2003, 2004, 2005

-If you add extra text to the body of the license, be careful not to

-add further restrictions.

-/*

- * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

- *

- * purpose with or without fee is hereby granted, provided that the above

- * copyright notice and this permission notice appear in all copies.

- *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

- */

-An extra line

--- a/sys/src/cmd/diff/test/diff-t2.expected

+++ b/sys/src/cmd/diff/test/diff-t2.expected

@@ -1,5 +1,5 @@

---- diff-t2.1

-+++ diff-t2.2

+--- diff-t2.l

++++ diff-t2.r

 @@ -3,7 +3,7 @@

  It is important to specify the year of the copyright.  Additional years

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t2.l

@@ -1,0 +1,25 @@

+Below is an example license to be used for new code in OpenBSD,

+modeled after the ISC license.

+It is important to specify the year of the copyright.  Additional years

+should be separated by a comma, e.g.

+    Copyright (c) 2003, 2004

+If you add extra text to the body of the license, be careful not to

+add further restrictions.

+/*

+ * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

+ *

+ * Permission to use, copy, modify, and distribute this software for any

+ * purpose with or without fee is hereby granted, provided that the above

+ * copyright notice and this permission notice appear in all copies.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ */

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t2.r

@@ -1,0 +1,25 @@

+Below is an example license to be used for new code in OpenBSD,

+modeled after the ISC license.

+It is important to specify the year of the copyright.  Additional years

+should be separated by a comma, e.g.

+    Copyright (c) 2003, 2004, 2005

+If you add extra text to the body of the license, be careful not to

+add further restrictions.

+/*

+ * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

+ *

+ * purpose with or without fee is hereby granted, provided that the above

+ * copyright notice and this permission notice appear in all copies.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ */

+An extra line

--- a/sys/src/cmd/diff/test/diff-t3.2

+++ /dev/null

@@ -1,25 +1,0 @@

-Below is an example license to be used for new code in OpenBSD,

-modeled after the ISC license.

-It is important to specify the year of the copyright.  Additional years

-should be separated by a comma, e.g.

-    Copyright (c) 2003, 2004

-If you add extra text to the body of the license, be careful not to

-add further restrictions.

-/*

- * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

- *

- * Permission to use, copy, modify, and distribute this software for any

- * purpose with or without fee is hereby granted, provided that the above

- * copyright notice and this permission notice appear in all copies.

- *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

- */

--- a/sys/src/cmd/diff/test/diff-t3.expected

+++ b/sys/src/cmd/diff/test/diff-t3.expected

@@ -1,5 +1,5 @@

---- diff-t3.1

-+++ diff-t3.2

+--- diff-t3.l

++++ diff-t3.r

 @@ -1,0 +1,25 @@

 +Below is an example license to be used for new code in OpenBSD,

 +modeled after the ISC license.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t3.r

@@ -1,0 +1,25 @@

+Below is an example license to be used for new code in OpenBSD,

+modeled after the ISC license.

+It is important to specify the year of the copyright.  Additional years

+should be separated by a comma, e.g.

+    Copyright (c) 2003, 2004

+If you add extra text to the body of the license, be careful not to

+add further restrictions.

+/*

+ * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

+ *

+ * Permission to use, copy, modify, and distribute this software for any

+ * purpose with or without fee is hereby granted, provided that the above

+ * copyright notice and this permission notice appear in all copies.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ */

--- a/sys/src/cmd/diff/test/diff-t4.1

+++ /dev/null

@@ -1,25 +1,0 @@

-Below is an example license to be used for new code in OpenBSD,

-modeled after the ISC license.

-It is important to specify the year of the copyright.  Additional years

-should be separated by a comma, e.g.

-    Copyright (c) 2003, 2004

-If you add extra text to the body of the license, be careful not to

-add further restrictions.

-/*

- * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

- *

- * Permission to use, copy, modify, and distribute this software for any

- * purpose with or without fee is hereby granted, provided that the above

- * copyright notice and this permission notice appear in all copies.

- *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

- */

--- a/sys/src/cmd/diff/test/diff-t4.expected

+++ b/sys/src/cmd/diff/test/diff-t4.expected

@@ -1,5 +1,5 @@

---- diff-t4.1

-+++ diff-t4.2

+--- diff-t4.l

++++ diff-t4.r

 @@ -1,25 +1,0 @@

 -Below is an example license to be used for new code in OpenBSD,

 -modeled after the ISC license.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t4.l

@@ -1,0 +1,25 @@

+Below is an example license to be used for new code in OpenBSD,

+modeled after the ISC license.

+It is important to specify the year of the copyright.  Additional years

+should be separated by a comma, e.g.

+    Copyright (c) 2003, 2004

+If you add extra text to the body of the license, be careful not to

+add further restrictions.

+/*

+ * Copyright (c) CCYY YOUR NAME HERE <user@your.dom.ain>

+ *

+ * Permission to use, copy, modify, and distribute this software for any

+ * purpose with or without fee is hereby granted, provided that the above

+ * copyright notice and this permission notice appear in all copies.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ */

--- a/sys/src/cmd/diff/test/diff-t5.1

+++ /dev/null

@@ -1,10 +1,0 @@

-OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

-Welcome to OpenBSD: The proactively secure Unix-like operating system.

-Please use the sendbug(1) utility to report bugs in the system.

-Before reporting a bug, please try to reproduce it with the latest

-version of the code.  With bug reports, please try to ensure that

-enough information to reproduce the problem is enclosed, and if a

-known fix for it exists, include that as well.

--- a/sys/src/cmd/diff/test/diff-t5.2

+++ /dev/null

@@ -1,10 +1,0 @@

-OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

-Welcome to OpenBSD: The proactively secure Unix-like operating system.

-Please use the sendbug(1) utility to report bugs in the system.

-Before reporting a bug, please try to reproduce it with the latest

-version of the code.  With bug reports, please try to ensure that

-enough information to reproduce the problem is enclosed, and if a

-known fix for it exists, include that as well.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t5.l

@@ -1,0 +1,10 @@

+OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

+Welcome to OpenBSD: The proactively secure Unix-like operating system.

+Please use the sendbug(1) utility to report bugs in the system.

+Before reporting a bug, please try to reproduce it with the latest

+version of the code.  With bug reports, please try to ensure that

+enough information to reproduce the problem is enclosed, and if a

+known fix for it exists, include that as well.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t5.r

@@ -1,0 +1,10 @@

+OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

+Welcome to OpenBSD: The proactively secure Unix-like operating system.

+Please use the sendbug(1) utility to report bugs in the system.

+Before reporting a bug, please try to reproduce it with the latest

+version of the code.  With bug reports, please try to ensure that

+enough information to reproduce the problem is enclosed, and if a

+known fix for it exists, include that as well.

--- a/sys/src/cmd/diff/test/diff-t6.1

+++ /dev/null

@@ -1,9 +1,0 @@

-OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

-Welcome to OpenBSD: The proactively secure Unix-like operating system.

-Please use the sendbug(1) utility to report bugs in the system.

-Before reporting a bug, please try to reproduce it with the latest

-version of the code.  With bug reports, please try to ensure that

-enough information to reproduce the problem is enclosed, and if a

-known fix for it exists, include that as well.

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t6.2

+++ /dev/null

@@ -1,9 +1,0 @@

-OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

-Welcome to OpenBSD: The proactively secure Unix-like operating system.

-Please use the sendbug(1) utility to report bugs in the system.

-Before reporting a bug, please try to reproduce it with the latest

-version of the code.  With bug reports, please try to ensure that

-enough information to reproduce the problem is enclosed, and if a

-known fix for it exists, include that as well.

--- a/sys/src/cmd/diff/test/diff-t6.expected

+++ b/sys/src/cmd/diff/test/diff-t6.expected

@@ -1,5 +1,5 @@

---- diff-t6.1

-+++ diff-t6.2

+--- diff-t6.l

++++ diff-t6.r

 @@ -6,4 +6,4 @@

  Before reporting a bug, please try to reproduce it with the latest

  version of the code.  With bug reports, please try to ensure that

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t6.l

@@ -1,0 +1,9 @@

+OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

+Welcome to OpenBSD: The proactively secure Unix-like operating system.

+Please use the sendbug(1) utility to report bugs in the system.

+Before reporting a bug, please try to reproduce it with the latest

+version of the code.  With bug reports, please try to ensure that

+enough information to reproduce the problem is enclosed, and if a

+known fix for it exists, include that as well.

\ No newline at end of file

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t6.r

@@ -1,0 +1,9 @@

+OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

+Welcome to OpenBSD: The proactively secure Unix-like operating system.

+Please use the sendbug(1) utility to report bugs in the system.

+Before reporting a bug, please try to reproduce it with the latest

+version of the code.  With bug reports, please try to ensure that

+enough information to reproduce the problem is enclosed, and if a

+known fix for it exists, include that as well.

--- a/sys/src/cmd/diff/test/diff-t7.1

+++ /dev/null

@@ -1,9 +1,0 @@

-OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

-Welcome to OpenBSD: The proactively secure Unix-like operating system.

-Please use the sendbug(1) utility to report bugs in the system.

-Before reporting a bug, please try to reproduce it with the latest

-version of the code.  With bug reports, please try to ensure that

-enough information to reproduce the problem is enclosed, and if a

-known fix for it exists, include that as well.

--- a/sys/src/cmd/diff/test/diff-t7.2

+++ /dev/null

@@ -1,9 +1,0 @@

-OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

-Welcome to OpenBSD: The proactively secure Unix-like operating system.

-Please use the sendbug(1) utility to report bugs in the system.

-Before reporting a bug, please try to reproduce it with the latest

-version of the code.  With bug reports, please try to ensure that

-enough information to reproduce the problem is enclosed, and if a

-known fix for it exists, include that as well.

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t7.expected

+++ b/sys/src/cmd/diff/test/diff-t7.expected

@@ -1,5 +1,5 @@

---- diff-t7.1

-+++ diff-t7.2

+--- diff-t7.l

++++ diff-t7.r

 @@ -6,4 +6,4 @@

  Before reporting a bug, please try to reproduce it with the latest

  version of the code.  With bug reports, please try to ensure that

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t7.l

@@ -1,0 +1,9 @@

+OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

+Welcome to OpenBSD: The proactively secure Unix-like operating system.

+Please use the sendbug(1) utility to report bugs in the system.

+Before reporting a bug, please try to reproduce it with the latest

+version of the code.  With bug reports, please try to ensure that

+enough information to reproduce the problem is enclosed, and if a

+known fix for it exists, include that as well.

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t7.r

@@ -1,0 +1,9 @@

+OpenBSD 3.3-current (GENERIC) #47: Mon Jun 30 11:19:56 CEST 2003

+Welcome to OpenBSD: The proactively secure Unix-like operating system.

+Please use the sendbug(1) utility to report bugs in the system.

+Before reporting a bug, please try to reproduce it with the latest

+version of the code.  With bug reports, please try to ensure that

+enough information to reproduce the problem is enclosed, and if a

+known fix for it exists, include that as well.

\ No newline at end of file

--- a/sys/src/cmd/diff/test/diff-t8.1

+++ /dev/null

@@ -1,392 +1,0 @@

-/*	$NetBSD: kern_malloc.c,v 1.11 1995/05/01 22:39:11 cgd Exp $	*/

-/*

- * Copyright (c) 1987, 1991, 1993

- *	The Regents of the University of California.  All rights reserved.

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in the

- *    documentation and/or other materials provided with the distribution.

- * 3. Neither the name of the University nor the names of its contributors

- *    may be used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

- * SUCH DAMAGE.

- *

- *	@(#)kern_malloc.c	8.3 (Berkeley) 1/4/94

- */

-#include <sys/param.h>

-#include <sys/proc.h>

-#include <sys/map.h>

-#include <sys/kernel.h>

-#include <sys/malloc.h>

-#include <vm/vm.h>

-#include <vm/vm_kern.h>

-struct kmembuckets bucket[MINBUCKET + 16];

-struct kmemstats kmemstats[M_LAST];

-struct kmemusage *kmemusage;

-char *kmembase, *kmemlimit;

-char *memname[] = INITKMEMNAMES;

-#ifdef DIAGNOSTIC

-/*

- * This structure provides a set of masks to catch unaligned frees.

- */

-long addrmask[] = { 0,

-	0x00000001, 0x00000003, 0x00000007, 0x0000000f,

-	0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff,

-	0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff,

-	0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff,

-};

-/*

- * The WEIRD_ADDR is used as known text to copy into free objects so

- * that modifications after frees can be detected.

- */

-#define WEIRD_ADDR	0xdeadbeef

-#define MAX_COPY	32

-/*

- * Normally the freelist structure is used only to hold the list pointer

- * for free objects.  However, when running with diagnostics, the first

- * 8 bytes of the structure is unused except for diagnostic information,

- * and the free list pointer is at offst 8 in the structure.  Since the

- * first 8 bytes is the portion of the structure most often modified, this

- * helps to detect memory reuse problems and avoid free list corruption.

- */

-struct freelist {

-	int32_t	spare0;

-	int16_t	type;

-	int16_t	spare1;

-	caddr_t	next;

-};

-#else /* !DIAGNOSTIC */

-struct freelist {

-	caddr_t	next;

-};

-#endif /* DIAGNOSTIC */

-/*

- * Allocate a block of memory

- */

-void *

-malloc(size, type, flags)

-	unsigned long size;

-	int type, flags;

-{

-	register struct kmembuckets *kbp;

-	register struct kmemusage *kup;

-	register struct freelist *freep;

-	long indx, npg, allocsize;

-	int s;

-	caddr_t va, cp, savedlist;

-#ifdef DIAGNOSTIC

-	int32_t *end, *lp;

-	int copysize;

-	char *savedtype;

-#endif

-#ifdef KMEMSTATS

-	register struct kmemstats *ksp = &kmemstats[type];

-	if (((unsigned long)type) > M_LAST)

-		panic("malloc - bogus type");

-#endif

-	indx = BUCKETINDX(size);

-	kbp = &bucket[indx];

-	s = splimp();

-#ifdef KMEMSTATS

-	while (ksp->ks_memuse >= ksp->ks_limit) {

-		if (flags & M_NOWAIT) {

-			splx(s);

-			return ((void *) NULL);

-		}

-		if (ksp->ks_limblocks < 65535)

-			ksp->ks_limblocks++;

-		tsleep((caddr_t)ksp, PSWP+2, memname[type], 0);

-	}

-	ksp->ks_size |= 1 << indx;

-#endif

-#ifdef DIAGNOSTIC

-	copysize = 1 << indx < MAX_COPY ? 1 << indx : MAX_COPY;

-#endif

-	if (kbp->kb_next == NULL) {

-		kbp->kb_last = NULL;

-		if (size > MAXALLOCSAVE)

-			allocsize = roundup(size, CLBYTES);

-		else

-			allocsize = 1 << indx;

-		npg = clrnd(btoc(allocsize));

-		va = (caddr_t) kmem_malloc(kmem_map, (vm_size_t)ctob(npg),

-					   !(flags & M_NOWAIT));

-		if (va == NULL) {

-			splx(s);

-			return ((void *) NULL);

-		}

-#ifdef KMEMSTATS

-		kbp->kb_total += kbp->kb_elmpercl;

-#endif

-		kup = btokup(va);

-		kup->ku_indx = indx;

-		if (allocsize > MAXALLOCSAVE) {

-			if (npg > 65535)

-				panic("malloc: allocation too large");

-			kup->ku_pagecnt = npg;

-#ifdef KMEMSTATS

-			ksp->ks_memuse += allocsize;

-#endif

-			goto out;

-		}

-#ifdef KMEMSTATS

-		kup->ku_freecnt = kbp->kb_elmpercl;

-		kbp->kb_totalfree += kbp->kb_elmpercl;

-#endif

-		/*

-		 * Just in case we blocked while allocating memory,

-		 * and someone else also allocated memory for this

-		 * bucket, don't assume the list is still empty.

-		 */

-		savedlist = kbp->kb_next;

-		kbp->kb_next = cp = va + (npg * NBPG) - allocsize;

-		for (;;) {

-			freep = (struct freelist *)cp;

-#ifdef DIAGNOSTIC

-			/*

-			 * Copy in known text to detect modification

-			 * after freeing.

-			 */

-			end = (int32_t *)&cp[copysize];

-			for (lp = (int32_t *)cp; lp < end; lp++)

-				*lp = WEIRD_ADDR;

-			freep->type = M_FREE;

-#endif /* DIAGNOSTIC */

-			if (cp <= va)

-				break;

-			cp -= allocsize;

-			freep->next = cp;

-		}

-		freep->next = savedlist;

-		if (kbp->kb_last == NULL)

-			kbp->kb_last = (caddr_t)freep;

-	}

-	va = kbp->kb_next;

-	kbp->kb_next = ((struct freelist *)va)->next;

-#ifdef DIAGNOSTIC

-	freep = (struct freelist *)va;

-	savedtype = (unsigned)freep->type < M_LAST ?

-		memname[freep->type] : "???";

-	if (kbp->kb_next &&

-	    !kernacc(kbp->kb_next, sizeof(struct freelist), 0)) {

-		printf("%s %d of object %p size %d %s %s (invalid addr %p)\n",

-			"Data modified on freelist: word",

-			(int32_t *)&kbp->kb_next - (int32_t *)kbp, va, size,

-			"previous type", savedtype, kbp->kb_next);

-		kbp->kb_next = NULL;

-	}

-	/* Fill the fields that we've used with WEIRD_ADDR */

-#if BYTE_ORDER == BIG_ENDIAN

-	freep->type = WEIRD_ADDR >> 16;

-#endif

-#if BYTE_ORDER == LITTLE_ENDIAN

-	freep->type = (short)WEIRD_ADDR;

-#endif

-	end = (int32_t *)&freep->next +

-	    (sizeof(freep->next) / sizeof(int32_t));

-	for (lp = (int32_t *)&freep->next; lp < end; lp++)

-		*lp = WEIRD_ADDR;

-	/* and check that the data hasn't been modified. */

-	end = (int32_t *)&va[copysize];

-	for (lp = (int32_t *)va; lp < end; lp++) {

-		if (*lp == WEIRD_ADDR)

-			continue;

-		printf("%s %d of object %p size %d %s %s (%p != %p)\n",

-			"Data modified on freelist: word", lp - (int32_t *)va,

-			va, size, "previous type", savedtype, *lp, WEIRD_ADDR);

-		break;

-	}

-	freep->spare0 = 0;

-#endif /* DIAGNOSTIC */

-#ifdef KMEMSTATS

-	kup = btokup(va);

-	if (kup->ku_indx != indx)

-		panic("malloc: wrong bucket");

-	if (kup->ku_freecnt == 0)

-		panic("malloc: lost data");

-	kup->ku_freecnt--;

-	kbp->kb_totalfree--;

-	ksp->ks_memuse += 1 << indx;

-out:

-	kbp->kb_calls++;

-	ksp->ks_inuse++;

-	ksp->ks_calls++;

-	if (ksp->ks_memuse > ksp->ks_maxused)

-		ksp->ks_maxused = ksp->ks_memuse;

-#else

-out:

-#endif

-	splx(s);

-	return ((void *) va);

-}

-/*

- * Free a block of memory allocated by malloc.

- */

-void

-free(addr, type)

-	void *addr;

-	int type;

-{

-	register struct kmembuckets *kbp;

-	register struct kmemusage *kup;

-	register struct freelist *freep;

-	long size;

-	int s;

-#ifdef DIAGNOSTIC

-	caddr_t cp;

-	int32_t *end, *lp;

-	long alloc, copysize;

-#endif

-#ifdef KMEMSTATS

-	register struct kmemstats *ksp = &kmemstats[type];

-#endif

-	kup = btokup(addr);

-	size = 1 << kup->ku_indx;

-	kbp = &bucket[kup->ku_indx];

-	s = splimp();

-#ifdef DIAGNOSTIC

-	/*

-	 * Check for returns of data that do not point to the

-	 * beginning of the allocation.

-	 */

-	if (size > NBPG * CLSIZE)

-		alloc = addrmask[BUCKETINDX(NBPG * CLSIZE)];

-	else

-		alloc = addrmask[kup->ku_indx];

-	if (((u_long)addr & alloc) != 0)

-		panic("free: unaligned addr 0x%x, size %d, type %s, mask %d\n",

-			addr, size, memname[type], alloc);

-#endif /* DIAGNOSTIC */

-	if (size > MAXALLOCSAVE) {

-		kmem_free(kmem_map, (vm_offset_t)addr, ctob(kup->ku_pagecnt));

-#ifdef KMEMSTATS

-		size = kup->ku_pagecnt << PGSHIFT;

-		ksp->ks_memuse -= size;

-		kup->ku_indx = 0;

-		kup->ku_pagecnt = 0;

-		if (ksp->ks_memuse + size >= ksp->ks_limit &&

-		    ksp->ks_memuse < ksp->ks_limit)

-			wakeup((caddr_t)ksp);

-		ksp->ks_inuse--;

-		kbp->kb_total -= 1;

-#endif

-		splx(s);

-		return;

-	}

-	freep = (struct freelist *)addr;

-#ifdef DIAGNOSTIC

-	/*

-	 * Check for multiple frees. Use a quick check to see if

-	 * it looks free before laboriously searching the freelist.

-	 */

-	if (freep->spare0 == WEIRD_ADDR) {

-		for (cp = kbp->kb_next; cp; cp = *(caddr_t *)cp) {

-			if (addr != cp)

-				continue;

-			printf("multiply freed item %p\n", addr);

-			panic("free: duplicated free");

-		}

-	}

-	/*

-	 * Copy in known text to detect modification after freeing

-	 * and to make it look free. Also, save the type being freed

-	 * so we can list likely culprit if modification is detected

-	 * when the object is reallocated.

-	 */

-	copysize = size < MAX_COPY ? size : MAX_COPY;

-	end = (int32_t *)&((caddr_t)addr)[copysize];

-	for (lp = (int32_t *)addr; lp < end; lp++)

-		*lp = WEIRD_ADDR;

-	freep->type = type;

-#endif /* DIAGNOSTIC */

-#ifdef KMEMSTATS

-	kup->ku_freecnt++;

-	if (kup->ku_freecnt >= kbp->kb_elmpercl)

-		if (kup->ku_freecnt > kbp->kb_elmpercl)

-			panic("free: multiple frees");

-		else if (kbp->kb_totalfree > kbp->kb_highwat)

-			kbp->kb_couldfree++;

-	kbp->kb_totalfree++;

-	ksp->ks_memuse -= size;

-	if (ksp->ks_memuse + size >= ksp->ks_limit &&

-	    ksp->ks_memuse < ksp->ks_limit)

-		wakeup((caddr_t)ksp);

-	ksp->ks_inuse--;

-#endif

-	if (kbp->kb_next == NULL)

-		kbp->kb_next = addr;

-	else

-		((struct freelist *)kbp->kb_last)->next = addr;

-	freep->next = NULL;

-	kbp->kb_last = addr;

-	splx(s);

-}

-/*

- * Initialize the kernel memory allocator

- */

-kmeminit()

-{

-	register long indx;

-	int npg;

-#if	((MAXALLOCSAVE & (MAXALLOCSAVE - 1)) != 0)

-		ERROR!_kmeminit:_MAXALLOCSAVE_not_power_of_2

-#endif

-#if	(MAXALLOCSAVE > MINALLOCSIZE * 32768)

-		ERROR!_kmeminit:_MAXALLOCSAVE_too_big

-#endif

-#if	(MAXALLOCSAVE < CLBYTES)

-		ERROR!_kmeminit:_MAXALLOCSAVE_too_small

-#endif

-	if (sizeof(struct freelist) > (1 << MINBUCKET))

-		panic("minbucket too small/struct freelist too big");

-	npg = VM_KMEM_SIZE/ NBPG;

-	kmemusage = (struct kmemusage *) kmem_alloc(kernel_map,

-		(vm_size_t)(npg * sizeof(struct kmemusage)));

-	kmem_map = kmem_suballoc(kernel_map, (vm_offset_t *)&kmembase,

-		(vm_offset_t *)&kmemlimit, (vm_size_t)(npg * NBPG), FALSE);

-#ifdef KMEMSTATS

-	for (indx = 0; indx < MINBUCKET + 16; indx++) {

-		if (1 << indx >= CLBYTES)

-			bucket[indx].kb_elmpercl = 1;

-		else

-			bucket[indx].kb_elmpercl = CLBYTES / (1 << indx);

-		bucket[indx].kb_highwat = 5 * bucket[indx].kb_elmpercl;

-	}

-	for (indx = 0; indx < M_LAST; indx++)

-		kmemstats[indx].ks_limit = npg * NBPG * 6 / 10;

-#endif

-}

--- a/sys/src/cmd/diff/test/diff-t8.2

+++ /dev/null

@@ -1,616 +1,0 @@

-/*	$OpenBSD: t8.2,v 1.1 2003/07/17 21:04:04 otto Exp $	*/

-/*	$NetBSD: kern_malloc.c,v 1.15.4.2 1996/06/13 17:10:56 cgd Exp $	*/

-/*

- * Copyright (c) 1987, 1991, 1993

- *	The Regents of the University of California.  All rights reserved.

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in the

- *    documentation and/or other materials provided with the distribution.

- * 3. Neither the name of the University nor the names of its contributors

- *    may be used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

- * SUCH DAMAGE.

- *

- *	@(#)kern_malloc.c	8.3 (Berkeley) 1/4/94

- */

-#include <sys/param.h>

-#include <sys/proc.h>

-#include <sys/kernel.h>

-#include <sys/malloc.h>

-#include <sys/systm.h>

-#include <sys/sysctl.h>

-#include <uvm/uvm_extern.h>

-static struct vm_map_intrsafe kmem_map_store;

-struct vm_map *kmem_map = NULL;

-#ifdef NKMEMCLUSTERS

-#error NKMEMCLUSTERS is obsolete; remove it from your kernel config file and use NKMEMPAGES instead or let the kernel auto-size

-#endif

-/*

- * Default number of pages in kmem_map.  We attempt to calculate this

- * at run-time, but allow it to be either patched or set in the kernel

- * config file.

- */

-#ifndef NKMEMPAGES

-#define	NKMEMPAGES	0

-#endif

-int	nkmempages = NKMEMPAGES;

-/*

- * Defaults for lower- and upper-bounds for the kmem_map page count.

- * Can be overridden by kernel config options.

- */

-#ifndef	NKMEMPAGES_MIN

-#define	NKMEMPAGES_MIN	NKMEMPAGES_MIN_DEFAULT

-#endif

-#ifndef NKMEMPAGES_MAX

-#define	NKMEMPAGES_MAX	NKMEMPAGES_MAX_DEFAULT

-#endif

-struct kmembuckets bucket[MINBUCKET + 16];

-struct kmemstats kmemstats[M_LAST];

-struct kmemusage *kmemusage;

-char *kmembase, *kmemlimit;

-char buckstring[16 * sizeof("123456,")];

-int buckstring_init = 0;

-#if defined(KMEMSTATS) || defined(DIAGNOSTIC) || defined(FFS_SOFTUPDATES)

-char *memname[] = INITKMEMNAMES;

-char *memall = NULL;

-extern struct lock sysctl_kmemlock;

-#endif

-#ifdef DIAGNOSTIC

-/*

- * This structure provides a set of masks to catch unaligned frees.

- */

-const long addrmask[] = { 0,

-	0x00000001, 0x00000003, 0x00000007, 0x0000000f,

-	0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff,

-	0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff,

-	0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff,

-};

-/*

- * The WEIRD_ADDR is used as known text to copy into free objects so

- * that modifications after frees can be detected.

- */

-#define WEIRD_ADDR	((unsigned) 0xdeadbeef)

-#define MAX_COPY	32

-/*

- * Normally the freelist structure is used only to hold the list pointer

- * for free objects.  However, when running with diagnostics, the first

- * 8 bytes of the structure is unused except for diagnostic information,

- * and the free list pointer is at offset 8 in the structure.  Since the

- * first 8 bytes is the portion of the structure most often modified, this

- * helps to detect memory reuse problems and avoid free list corruption.

- */

-struct freelist {

-	int32_t	spare0;

-	int16_t	type;

-	int16_t	spare1;

-	caddr_t	next;

-};

-#else /* !DIAGNOSTIC */

-struct freelist {

-	caddr_t	next;

-};

-#endif /* DIAGNOSTIC */

-/*

- * Allocate a block of memory

- */

-void *

-malloc(size, type, flags)

-	unsigned long size;

-	int type, flags;

-{

-	register struct kmembuckets *kbp;

-	register struct kmemusage *kup;

-	register struct freelist *freep;

-	long indx, npg, allocsize;

-	int s;

-	caddr_t va, cp, savedlist;

-#ifdef DIAGNOSTIC

-	int32_t *end, *lp;

-	int copysize;

-	char *savedtype;

-#endif

-#ifdef KMEMSTATS

-	register struct kmemstats *ksp = &kmemstats[type];

-	if (((unsigned long)type) >= M_LAST)

-		panic("malloc - bogus type");

-#endif

-#ifdef MALLOC_DEBUG

-	if (debug_malloc(size, type, flags, (void **)&va))

-		return ((void *) va);

-#endif

-	indx = BUCKETINDX(size);

-	kbp = &bucket[indx];

-	s = splvm();

-#ifdef KMEMSTATS

-	while (ksp->ks_memuse >= ksp->ks_limit) {

-		if (flags & M_NOWAIT) {

-			splx(s);

-			return ((void *) NULL);

-		}

-		if (ksp->ks_limblocks < 65535)

-			ksp->ks_limblocks++;

-		tsleep((caddr_t)ksp, PSWP+2, memname[type], 0);

-	}

-	ksp->ks_size |= 1 << indx;

-#endif

-#ifdef DIAGNOSTIC

-	copysize = 1 << indx < MAX_COPY ? 1 << indx : MAX_COPY;

-#endif

-	if (kbp->kb_next == NULL) {

-		kbp->kb_last = NULL;

-		if (size > MAXALLOCSAVE)

-			allocsize = round_page(size);

-		else

-			allocsize = 1 << indx;

-		npg = btoc(allocsize);

-		va = (caddr_t) uvm_km_kmemalloc(kmem_map, uvmexp.kmem_object,

-				(vsize_t)ctob(npg),

-				(flags & M_NOWAIT) ? UVM_KMF_NOWAIT : 0);

-		if (va == NULL) {

-			/*

-			 * Kmem_malloc() can return NULL, even if it can

-			 * wait, if there is no map space available, because

-			 * it can't fix that problem.  Neither can we,

-			 * right now.  (We should release pages which

-			 * are completely free and which are in buckets

-			 * with too many free elements.)

-			 */

-			if ((flags & M_NOWAIT) == 0)

-				panic("malloc: out of space in kmem_map");

-			splx(s);

-			return ((void *) NULL);

-		}

-#ifdef KMEMSTATS

-		kbp->kb_total += kbp->kb_elmpercl;

-#endif

-		kup = btokup(va);

-		kup->ku_indx = indx;

-		if (allocsize > MAXALLOCSAVE) {

-			if (npg > 65535)

-				panic("malloc: allocation too large");

-			kup->ku_pagecnt = npg;

-#ifdef KMEMSTATS

-			ksp->ks_memuse += allocsize;

-#endif

-			goto out;

-		}

-#ifdef KMEMSTATS

-		kup->ku_freecnt = kbp->kb_elmpercl;

-		kbp->kb_totalfree += kbp->kb_elmpercl;

-#endif

-		/*

-		 * Just in case we blocked while allocating memory,

-		 * and someone else also allocated memory for this

-		 * bucket, don't assume the list is still empty.

-		 */

-		savedlist = kbp->kb_next;

-		kbp->kb_next = cp = va + (npg * PAGE_SIZE) - allocsize;

-		for (;;) {

-			freep = (struct freelist *)cp;

-#ifdef DIAGNOSTIC

-			/*

-			 * Copy in known text to detect modification

-			 * after freeing.

-			 */

-			end = (int32_t *)&cp[copysize];

-			for (lp = (int32_t *)cp; lp < end; lp++)

-				*lp = WEIRD_ADDR;

-			freep->type = M_FREE;

-#endif /* DIAGNOSTIC */

-			if (cp <= va)

-				break;

-			cp -= allocsize;

-			freep->next = cp;

-		}

-		freep->next = savedlist;

-		if (kbp->kb_last == NULL)

-			kbp->kb_last = (caddr_t)freep;

-	}

-	va = kbp->kb_next;

-	kbp->kb_next = ((struct freelist *)va)->next;

-#ifdef DIAGNOSTIC

-	freep = (struct freelist *)va;

-	savedtype = (unsigned)freep->type < M_LAST ?

-		memname[freep->type] : "???";

-	if (kbp->kb_next) {

-		int rv;

-		vaddr_t addr = (vaddr_t)kbp->kb_next;

-		vm_map_lock(kmem_map);

-		rv = uvm_map_checkprot(kmem_map, addr,

-		    addr + sizeof(struct freelist), VM_PROT_WRITE);

-		vm_map_unlock(kmem_map);

-		if (!rv)  {

-		printf("%s %d of object %p size 0x%lx %s %s (invalid addr %p)\n",

-			"Data modified on freelist: word",

-			(int32_t *)&kbp->kb_next - (int32_t *)kbp, va, size,

-			"previous type", savedtype, kbp->kb_next);

-		kbp->kb_next = NULL;

-		}

-	}

-	/* Fill the fields that we've used with WEIRD_ADDR */

-#if BYTE_ORDER == BIG_ENDIAN

-	freep->type = WEIRD_ADDR >> 16;

-#endif

-#if BYTE_ORDER == LITTLE_ENDIAN

-	freep->type = (short)WEIRD_ADDR;

-#endif

-	end = (int32_t *)&freep->next +

-	    (sizeof(freep->next) / sizeof(int32_t));

-	for (lp = (int32_t *)&freep->next; lp < end; lp++)

-		*lp = WEIRD_ADDR;

-	/* and check that the data hasn't been modified. */

-	end = (int32_t *)&va[copysize];

-	for (lp = (int32_t *)va; lp < end; lp++) {

-		if (*lp == WEIRD_ADDR)

-			continue;

-		printf("%s %d of object %p size 0x%lx %s %s (0x%x != 0x%x)\n",

-			"Data modified on freelist: word", lp - (int32_t *)va,

-			va, size, "previous type", savedtype, *lp, WEIRD_ADDR);

-		break;

-	}

-	freep->spare0 = 0;

-#endif /* DIAGNOSTIC */

-#ifdef KMEMSTATS

-	kup = btokup(va);

-	if (kup->ku_indx != indx)

-		panic("malloc: wrong bucket");

-	if (kup->ku_freecnt == 0)

-		panic("malloc: lost data");

-	kup->ku_freecnt--;

-	kbp->kb_totalfree--;

-	ksp->ks_memuse += 1 << indx;

-out:

-	kbp->kb_calls++;

-	ksp->ks_inuse++;

-	ksp->ks_calls++;

-	if (ksp->ks_memuse > ksp->ks_maxused)

-		ksp->ks_maxused = ksp->ks_memuse;

-#else

-out:

-#endif

-	splx(s);

-	return ((void *) va);

-}

-/*

- * Free a block of memory allocated by malloc.

- */

-void

-free(addr, type)

-	void *addr;

-	int type;

-{

-	register struct kmembuckets *kbp;

-	register struct kmemusage *kup;

-	register struct freelist *freep;

-	long size;

-	int s;

-#ifdef DIAGNOSTIC

-	caddr_t cp;

-	int32_t *end, *lp;

-	long alloc, copysize;

-#endif

-#ifdef KMEMSTATS

-	register struct kmemstats *ksp = &kmemstats[type];

-#endif

-#ifdef MALLOC_DEBUG

-	if (debug_free(addr, type))

-		return;

-#endif

-#ifdef DIAGNOSTIC

-	if (addr < (void *)kmembase || addr >= (void *)kmemlimit)

-		panic("free: non-malloced addr %p type %s", addr,

-		    memname[type]);

-#endif

-	kup = btokup(addr);

-	size = 1 << kup->ku_indx;

-	kbp = &bucket[kup->ku_indx];

-	s = splvm();

-#ifdef DIAGNOSTIC

-	/*

-	 * Check for returns of data that do not point to the

-	 * beginning of the allocation.

-	 */

-	if (size > PAGE_SIZE)

-		alloc = addrmask[BUCKETINDX(PAGE_SIZE)];

-	else

-		alloc = addrmask[kup->ku_indx];

-	if (((u_long)addr & alloc) != 0)

-		panic("free: unaligned addr %p, size %ld, type %s, mask %ld",

-			addr, size, memname[type], alloc);

-#endif /* DIAGNOSTIC */

-	if (size > MAXALLOCSAVE) {

-		uvm_km_free(kmem_map, (vaddr_t)addr, ctob(kup->ku_pagecnt));

-#ifdef KMEMSTATS

-		size = kup->ku_pagecnt << PGSHIFT;

-		ksp->ks_memuse -= size;

-		kup->ku_indx = 0;

-		kup->ku_pagecnt = 0;

-		if (ksp->ks_memuse + size >= ksp->ks_limit &&

-		    ksp->ks_memuse < ksp->ks_limit)

-			wakeup((caddr_t)ksp);

-		ksp->ks_inuse--;

-		kbp->kb_total -= 1;

-#endif

-		splx(s);

-		return;

-	}

-	freep = (struct freelist *)addr;

-#ifdef DIAGNOSTIC

-	/*

-	 * Check for multiple frees. Use a quick check to see if

-	 * it looks free before laboriously searching the freelist.

-	 */

-	if (freep->spare0 == WEIRD_ADDR) {

-		for (cp = kbp->kb_next; cp;

-		    cp = ((struct freelist *)cp)->next) {

-			if (addr != cp)

-				continue;

-			printf("multiply freed item %p\n", addr);

-			panic("free: duplicated free");

-		}

-	}

-	/*

-	 * Copy in known text to detect modification after freeing

-	 * and to make it look free. Also, save the type being freed

-	 * so we can list likely culprit if modification is detected

-	 * when the object is reallocated.

-	 */

-	copysize = size < MAX_COPY ? size : MAX_COPY;

-	end = (int32_t *)&((caddr_t)addr)[copysize];

-	for (lp = (int32_t *)addr; lp < end; lp++)

-		*lp = WEIRD_ADDR;

-	freep->type = type;

-#endif /* DIAGNOSTIC */

-#ifdef KMEMSTATS

-	kup->ku_freecnt++;

-	if (kup->ku_freecnt >= kbp->kb_elmpercl) {

-		if (kup->ku_freecnt > kbp->kb_elmpercl)

-			panic("free: multiple frees");

-		else if (kbp->kb_totalfree > kbp->kb_highwat)

-			kbp->kb_couldfree++;

-	}

-	kbp->kb_totalfree++;

-	ksp->ks_memuse -= size;

-	if (ksp->ks_memuse + size >= ksp->ks_limit &&

-	    ksp->ks_memuse < ksp->ks_limit)

-		wakeup((caddr_t)ksp);

-	ksp->ks_inuse--;

-#endif

-	if (kbp->kb_next == NULL)

-		kbp->kb_next = addr;

-	else

-		((struct freelist *)kbp->kb_last)->next = addr;

-	freep->next = NULL;

-	kbp->kb_last = addr;

-	splx(s);

-}

-/*

- * Compute the number of pages that kmem_map will map, that is,

- * the size of the kernel malloc arena.

- */

-void

-kmeminit_nkmempages()

-{

-	int npages;

-	if (nkmempages != 0) {

-		/*

-		 * It's already been set (by us being here before, or

-		 * by patching or kernel config options), bail out now.

-		 */

-		return;

-	}

-	/*

-	 * We use the following (simple) formula:

-	 *

-	 *	- Starting point is physical memory / 4.

-	 *

-	 *	- Clamp it down to NKMEMPAGES_MAX.

-	 *

-	 *	- Round it up to NKMEMPAGES_MIN.

-	 */

-	npages = physmem / 4;

-	if (npages > NKMEMPAGES_MAX)

-		npages = NKMEMPAGES_MAX;

-	if (npages < NKMEMPAGES_MIN)

-		npages = NKMEMPAGES_MIN;

-	nkmempages = npages;

-}

-/*

- * Initialize the kernel memory allocator

- */

-void

-kmeminit()

-{

-	vaddr_t base, limit;

-#ifdef KMEMSTATS

-	long indx;

-#endif

-#ifdef DIAGNOSTIC

-	if (sizeof(struct freelist) > (1 << MINBUCKET))

-		panic("kmeminit: minbucket too small/struct freelist too big");

-#endif

-	/*

-	 * Compute the number of kmem_map pages, if we have not

-	 * done so already.

-	 */

-	kmeminit_nkmempages();

-	base = vm_map_min(kernel_map);

-	kmem_map = uvm_km_suballoc(kernel_map, &base, &limit,

-	    (vsize_t)(nkmempages * PAGE_SIZE), VM_MAP_INTRSAFE, FALSE,

-	    &kmem_map_store.vmi_map);

-	kmembase = (char *)base;

-	kmemlimit = (char *)limit;

-	kmemusage = (struct kmemusage *) uvm_km_zalloc(kernel_map,

-		(vsize_t)(nkmempages * sizeof(struct kmemusage)));

-#ifdef KMEMSTATS

-	for (indx = 0; indx < MINBUCKET + 16; indx++) {

-		if (1 << indx >= PAGE_SIZE)

-			bucket[indx].kb_elmpercl = 1;

-		else

-			bucket[indx].kb_elmpercl = PAGE_SIZE / (1 << indx);

-		bucket[indx].kb_highwat = 5 * bucket[indx].kb_elmpercl;

-	}

-	for (indx = 0; indx < M_LAST; indx++)

-		kmemstats[indx].ks_limit = nkmempages * PAGE_SIZE * 6 / 10;

-#endif

-#ifdef MALLOC_DEBUG

-	debug_malloc_init();

-#endif

-}

-/*

- * Return kernel malloc statistics information.

- */

-int

-sysctl_malloc(name, namelen, oldp, oldlenp, newp, newlen, p)

-	int *name;

-	u_int namelen;

-	void *oldp;

-	size_t *oldlenp;

-	void *newp;

-	size_t newlen;

-	struct proc *p;

-{

-	struct kmembuckets kb;

-	int i, siz;

-	if (namelen != 2 && name[0] != KERN_MALLOC_BUCKETS &&

-	    name[0] != KERN_MALLOC_KMEMNAMES)

-		return (ENOTDIR);		/* overloaded */

-	switch (name[0]) {

-	case KERN_MALLOC_BUCKETS:

-		/* Initialize the first time */

-		if (buckstring_init == 0) {

-			buckstring_init = 1;

-			bzero(buckstring, sizeof(buckstring));

-			for (siz = 0, i = MINBUCKET; i < MINBUCKET + 16; i++) {

-				snprintf(buckstring + siz,

-				    sizeof buckstring - siz,

-				    "%d,", (u_int)(1<<i));

-				siz += strlen(buckstring + siz);

-			}

-			/* Remove trailing comma */

-			if (siz)

-				buckstring[siz - 1] = '\0';

-		}

-		return (sysctl_rdstring(oldp, oldlenp, newp, buckstring));

-	case KERN_MALLOC_BUCKET:

-		bcopy(&bucket[BUCKETINDX(name[1])], &kb, sizeof(kb));

-		kb.kb_next = kb.kb_last = 0;

-		return (sysctl_rdstruct(oldp, oldlenp, newp, &kb, sizeof(kb)));

-	case KERN_MALLOC_KMEMSTATS:

-#ifdef KMEMSTATS

-		if ((name[1] < 0) || (name[1] >= M_LAST))

-			return (EINVAL);

-		return (sysctl_rdstruct(oldp, oldlenp, newp,

-		    &kmemstats[name[1]], sizeof(struct kmemstats)));

-#else

-		return (EOPNOTSUPP);

-#endif

-	case KERN_MALLOC_KMEMNAMES:

-#if defined(KMEMSTATS) || defined(DIAGNOSTIC) || defined(FFS_SOFTUPDATES)

-		if (memall == NULL) {

-			int totlen;

-			i = lockmgr(&sysctl_kmemlock, LK_EXCLUSIVE, NULL, p);

-			if (i)

-				return (i);

-			/* Figure out how large a buffer we need */

-			for (totlen = 0, i = 0; i < M_LAST; i++) {

-				if (memname[i])

-					totlen += strlen(memname[i]);

-				totlen++;

-			}

-			memall = malloc(totlen + M_LAST, M_SYSCTL, M_WAITOK);

-			bzero(memall, totlen + M_LAST);

-			for (siz = 0, i = 0; i < M_LAST; i++) {

-				snprintf(memall + siz,

-				    totlen + M_LAST - siz,

-				    "%s,", memname[i] ? memname[i] : "");

-				siz += strlen(memall + siz);

-			}

-			/* Remove trailing comma */

-			if (siz)

-				memall[siz - 1] = '\0';

-			/* Now, convert all spaces to underscores */

-			for (i = 0; i < totlen; i++)

-				if (memall[i] == ' ')

-					memall[i] = '_';

-			lockmgr(&sysctl_kmemlock, LK_RELEASE, NULL, p);

-		}

-		return (sysctl_rdstring(oldp, oldlenp, newp, memall));

-#else

-		return (EOPNOTSUPP);

-#endif

-	default:

-		return (EOPNOTSUPP);

-	}

-	/* NOTREACHED */

-}

-/*

- * Round up a size to how much malloc would actually allocate.

- */

-size_t

-malloc_roundup(size_t sz)

-{

-	if (sz > MAXALLOCSAVE)

-		return round_page(sz);

-	return (1 << BUCKETINDX(sz));

-}

--- a/sys/src/cmd/diff/test/diff-t8.expected

+++ b/sys/src/cmd/diff/test/diff-t8.expected

@@ -1,5 +1,5 @@

---- diff-t8.1

-+++ diff-t8.2

+--- diff-t8.l

++++ diff-t8.r

 @@ -1,4 +1,5 @@

 -/*	$NetBSD: kern_malloc.c,v 1.11 1995/05/01 22:39:11 cgd Exp $	*/

 +/*	$OpenBSD: t8.2,v 1.1 2003/07/17 21:04:04 otto Exp $	*/

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t8.l

@@ -1,0 +1,392 @@

+/*	$NetBSD: kern_malloc.c,v 1.11 1995/05/01 22:39:11 cgd Exp $	*/

+/*

+ * Copyright (c) 1987, 1991, 1993

+ *	The Regents of the University of California.  All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions

+ * are met:

+ * 1. Redistributions of source code must retain the above copyright

+ *    notice, this list of conditions and the following disclaimer.

+ * 2. Redistributions in binary form must reproduce the above copyright

+ *    notice, this list of conditions and the following disclaimer in the

+ *    documentation and/or other materials provided with the distribution.

+ * 3. Neither the name of the University nor the names of its contributors

+ *    may be used to endorse or promote products derived from this software

+ *    without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

+ * SUCH DAMAGE.

+ *

+ *	@(#)kern_malloc.c	8.3 (Berkeley) 1/4/94

+ */

+#include <sys/param.h>

+#include <sys/proc.h>

+#include <sys/map.h>

+#include <sys/kernel.h>

+#include <sys/malloc.h>

+#include <vm/vm.h>

+#include <vm/vm_kern.h>

+struct kmembuckets bucket[MINBUCKET + 16];

+struct kmemstats kmemstats[M_LAST];

+struct kmemusage *kmemusage;

+char *kmembase, *kmemlimit;

+char *memname[] = INITKMEMNAMES;

+#ifdef DIAGNOSTIC

+/*

+ * This structure provides a set of masks to catch unaligned frees.

+ */

+long addrmask[] = { 0,

+	0x00000001, 0x00000003, 0x00000007, 0x0000000f,

+	0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff,

+	0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff,

+	0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff,

+};

+/*

+ * The WEIRD_ADDR is used as known text to copy into free objects so

+ * that modifications after frees can be detected.

+ */

+#define WEIRD_ADDR	0xdeadbeef

+#define MAX_COPY	32

+/*

+ * Normally the freelist structure is used only to hold the list pointer

+ * for free objects.  However, when running with diagnostics, the first

+ * 8 bytes of the structure is unused except for diagnostic information,

+ * and the free list pointer is at offst 8 in the structure.  Since the

+ * first 8 bytes is the portion of the structure most often modified, this

+ * helps to detect memory reuse problems and avoid free list corruption.

+ */

+struct freelist {

+	int32_t	spare0;

+	int16_t	type;

+	int16_t	spare1;

+	caddr_t	next;

+};

+#else /* !DIAGNOSTIC */

+struct freelist {

+	caddr_t	next;

+};

+#endif /* DIAGNOSTIC */

+/*

+ * Allocate a block of memory

+ */

+void *

+malloc(size, type, flags)

+	unsigned long size;

+	int type, flags;

+{

+	register struct kmembuckets *kbp;

+	register struct kmemusage *kup;

+	register struct freelist *freep;

+	long indx, npg, allocsize;

+	int s;

+	caddr_t va, cp, savedlist;

+#ifdef DIAGNOSTIC

+	int32_t *end, *lp;

+	int copysize;

+	char *savedtype;

+#endif

+#ifdef KMEMSTATS

+	register struct kmemstats *ksp = &kmemstats[type];

+	if (((unsigned long)type) > M_LAST)

+		panic("malloc - bogus type");

+#endif

+	indx = BUCKETINDX(size);

+	kbp = &bucket[indx];

+	s = splimp();

+#ifdef KMEMSTATS

+	while (ksp->ks_memuse >= ksp->ks_limit) {

+		if (flags & M_NOWAIT) {

+			splx(s);

+			return ((void *) NULL);

+		}

+		if (ksp->ks_limblocks < 65535)

+			ksp->ks_limblocks++;

+		tsleep((caddr_t)ksp, PSWP+2, memname[type], 0);

+	}

+	ksp->ks_size |= 1 << indx;

+#endif

+#ifdef DIAGNOSTIC

+	copysize = 1 << indx < MAX_COPY ? 1 << indx : MAX_COPY;

+#endif

+	if (kbp->kb_next == NULL) {

+		kbp->kb_last = NULL;

+		if (size > MAXALLOCSAVE)

+			allocsize = roundup(size, CLBYTES);

+		else

+			allocsize = 1 << indx;

+		npg = clrnd(btoc(allocsize));

+		va = (caddr_t) kmem_malloc(kmem_map, (vm_size_t)ctob(npg),

+					   !(flags & M_NOWAIT));

+		if (va == NULL) {

+			splx(s);

+			return ((void *) NULL);

+		}

+#ifdef KMEMSTATS

+		kbp->kb_total += kbp->kb_elmpercl;

+#endif

+		kup = btokup(va);

+		kup->ku_indx = indx;

+		if (allocsize > MAXALLOCSAVE) {

+			if (npg > 65535)

+				panic("malloc: allocation too large");

+			kup->ku_pagecnt = npg;

+#ifdef KMEMSTATS

+			ksp->ks_memuse += allocsize;

+#endif

+			goto out;

+		}

+#ifdef KMEMSTATS

+		kup->ku_freecnt = kbp->kb_elmpercl;

+		kbp->kb_totalfree += kbp->kb_elmpercl;

+#endif

+		/*

+		 * Just in case we blocked while allocating memory,

+		 * and someone else also allocated memory for this

+		 * bucket, don't assume the list is still empty.

+		 */

+		savedlist = kbp->kb_next;

+		kbp->kb_next = cp = va + (npg * NBPG) - allocsize;

+		for (;;) {

+			freep = (struct freelist *)cp;

+#ifdef DIAGNOSTIC

+			/*

+			 * Copy in known text to detect modification

+			 * after freeing.

+			 */

+			end = (int32_t *)&cp[copysize];

+			for (lp = (int32_t *)cp; lp < end; lp++)

+				*lp = WEIRD_ADDR;

+			freep->type = M_FREE;

+#endif /* DIAGNOSTIC */

+			if (cp <= va)

+				break;

+			cp -= allocsize;

+			freep->next = cp;

+		}

+		freep->next = savedlist;

+		if (kbp->kb_last == NULL)

+			kbp->kb_last = (caddr_t)freep;

+	}

+	va = kbp->kb_next;

+	kbp->kb_next = ((struct freelist *)va)->next;

+#ifdef DIAGNOSTIC

+	freep = (struct freelist *)va;

+	savedtype = (unsigned)freep->type < M_LAST ?

+		memname[freep->type] : "???";

+	if (kbp->kb_next &&

+	    !kernacc(kbp->kb_next, sizeof(struct freelist), 0)) {

+		printf("%s %d of object %p size %d %s %s (invalid addr %p)\n",

+			"Data modified on freelist: word",

+			(int32_t *)&kbp->kb_next - (int32_t *)kbp, va, size,

+			"previous type", savedtype, kbp->kb_next);

+		kbp->kb_next = NULL;

+	}

+	/* Fill the fields that we've used with WEIRD_ADDR */

+#if BYTE_ORDER == BIG_ENDIAN

+	freep->type = WEIRD_ADDR >> 16;

+#endif

+#if BYTE_ORDER == LITTLE_ENDIAN

+	freep->type = (short)WEIRD_ADDR;

+#endif

+	end = (int32_t *)&freep->next +

+	    (sizeof(freep->next) / sizeof(int32_t));

+	for (lp = (int32_t *)&freep->next; lp < end; lp++)

+		*lp = WEIRD_ADDR;

+	/* and check that the data hasn't been modified. */

+	end = (int32_t *)&va[copysize];

+	for (lp = (int32_t *)va; lp < end; lp++) {

+		if (*lp == WEIRD_ADDR)

+			continue;

+		printf("%s %d of object %p size %d %s %s (%p != %p)\n",

+			"Data modified on freelist: word", lp - (int32_t *)va,

+			va, size, "previous type", savedtype, *lp, WEIRD_ADDR);

+		break;

+	}

+	freep->spare0 = 0;

+#endif /* DIAGNOSTIC */

+#ifdef KMEMSTATS

+	kup = btokup(va);

+	if (kup->ku_indx != indx)

+		panic("malloc: wrong bucket");

+	if (kup->ku_freecnt == 0)

+		panic("malloc: lost data");

+	kup->ku_freecnt--;

+	kbp->kb_totalfree--;

+	ksp->ks_memuse += 1 << indx;

+out:

+	kbp->kb_calls++;

+	ksp->ks_inuse++;

+	ksp->ks_calls++;

+	if (ksp->ks_memuse > ksp->ks_maxused)

+		ksp->ks_maxused = ksp->ks_memuse;

+#else

+out:

+#endif

+	splx(s);

+	return ((void *) va);

+}

+/*

+ * Free a block of memory allocated by malloc.

+ */

+void

+free(addr, type)

+	void *addr;

+	int type;

+{

+	register struct kmembuckets *kbp;

+	register struct kmemusage *kup;

+	register struct freelist *freep;

+	long size;

+	int s;

+#ifdef DIAGNOSTIC

+	caddr_t cp;

+	int32_t *end, *lp;

+	long alloc, copysize;

+#endif

+#ifdef KMEMSTATS

+	register struct kmemstats *ksp = &kmemstats[type];

+#endif

+	kup = btokup(addr);

+	size = 1 << kup->ku_indx;

+	kbp = &bucket[kup->ku_indx];

+	s = splimp();

+#ifdef DIAGNOSTIC

+	/*

+	 * Check for returns of data that do not point to the

+	 * beginning of the allocation.

+	 */

+	if (size > NBPG * CLSIZE)

+		alloc = addrmask[BUCKETINDX(NBPG * CLSIZE)];

+	else

+		alloc = addrmask[kup->ku_indx];

+	if (((u_long)addr & alloc) != 0)

+		panic("free: unaligned addr 0x%x, size %d, type %s, mask %d\n",

+			addr, size, memname[type], alloc);

+#endif /* DIAGNOSTIC */

+	if (size > MAXALLOCSAVE) {

+		kmem_free(kmem_map, (vm_offset_t)addr, ctob(kup->ku_pagecnt));

+#ifdef KMEMSTATS

+		size = kup->ku_pagecnt << PGSHIFT;

+		ksp->ks_memuse -= size;

+		kup->ku_indx = 0;

+		kup->ku_pagecnt = 0;

+		if (ksp->ks_memuse + size >= ksp->ks_limit &&

+		    ksp->ks_memuse < ksp->ks_limit)

+			wakeup((caddr_t)ksp);

+		ksp->ks_inuse--;

+		kbp->kb_total -= 1;

+#endif

+		splx(s);

+		return;

+	}

+	freep = (struct freelist *)addr;

+#ifdef DIAGNOSTIC

+	/*

+	 * Check for multiple frees. Use a quick check to see if

+	 * it looks free before laboriously searching the freelist.

+	 */

+	if (freep->spare0 == WEIRD_ADDR) {

+		for (cp = kbp->kb_next; cp; cp = *(caddr_t *)cp) {

+			if (addr != cp)

+				continue;

+			printf("multiply freed item %p\n", addr);

+			panic("free: duplicated free");

+		}

+	}

+	/*

+	 * Copy in known text to detect modification after freeing

+	 * and to make it look free. Also, save the type being freed

+	 * so we can list likely culprit if modification is detected

+	 * when the object is reallocated.

+	 */

+	copysize = size < MAX_COPY ? size : MAX_COPY;

+	end = (int32_t *)&((caddr_t)addr)[copysize];

+	for (lp = (int32_t *)addr; lp < end; lp++)

+		*lp = WEIRD_ADDR;

+	freep->type = type;

+#endif /* DIAGNOSTIC */

+#ifdef KMEMSTATS

+	kup->ku_freecnt++;

+	if (kup->ku_freecnt >= kbp->kb_elmpercl)

+		if (kup->ku_freecnt > kbp->kb_elmpercl)

+			panic("free: multiple frees");

+		else if (kbp->kb_totalfree > kbp->kb_highwat)

+			kbp->kb_couldfree++;

+	kbp->kb_totalfree++;

+	ksp->ks_memuse -= size;

+	if (ksp->ks_memuse + size >= ksp->ks_limit &&

+	    ksp->ks_memuse < ksp->ks_limit)

+		wakeup((caddr_t)ksp);

+	ksp->ks_inuse--;

+#endif

+	if (kbp->kb_next == NULL)

+		kbp->kb_next = addr;

+	else

+		((struct freelist *)kbp->kb_last)->next = addr;

+	freep->next = NULL;

+	kbp->kb_last = addr;

+	splx(s);

+}

+/*

+ * Initialize the kernel memory allocator

+ */

+kmeminit()

+{

+	register long indx;

+	int npg;

+#if	((MAXALLOCSAVE & (MAXALLOCSAVE - 1)) != 0)

+		ERROR!_kmeminit:_MAXALLOCSAVE_not_power_of_2

+#endif

+#if	(MAXALLOCSAVE > MINALLOCSIZE * 32768)

+		ERROR!_kmeminit:_MAXALLOCSAVE_too_big

+#endif

+#if	(MAXALLOCSAVE < CLBYTES)

+		ERROR!_kmeminit:_MAXALLOCSAVE_too_small

+#endif

+	if (sizeof(struct freelist) > (1 << MINBUCKET))

+		panic("minbucket too small/struct freelist too big");

+	npg = VM_KMEM_SIZE/ NBPG;

+	kmemusage = (struct kmemusage *) kmem_alloc(kernel_map,

+		(vm_size_t)(npg * sizeof(struct kmemusage)));

+	kmem_map = kmem_suballoc(kernel_map, (vm_offset_t *)&kmembase,

+		(vm_offset_t *)&kmemlimit, (vm_size_t)(npg * NBPG), FALSE);

+#ifdef KMEMSTATS

+	for (indx = 0; indx < MINBUCKET + 16; indx++) {

+		if (1 << indx >= CLBYTES)

+			bucket[indx].kb_elmpercl = 1;

+		else

+			bucket[indx].kb_elmpercl = CLBYTES / (1 << indx);

+		bucket[indx].kb_highwat = 5 * bucket[indx].kb_elmpercl;

+	}

+	for (indx = 0; indx < M_LAST; indx++)

+		kmemstats[indx].ks_limit = npg * NBPG * 6 / 10;

+#endif

+}

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t8.r

@@ -1,0 +1,616 @@

+/*	$OpenBSD: t8.2,v 1.1 2003/07/17 21:04:04 otto Exp $	*/

+/*	$NetBSD: kern_malloc.c,v 1.15.4.2 1996/06/13 17:10:56 cgd Exp $	*/

+/*

+ * Copyright (c) 1987, 1991, 1993

+ *	The Regents of the University of California.  All rights reserved.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions

+ * are met:

+ * 1. Redistributions of source code must retain the above copyright

+ *    notice, this list of conditions and the following disclaimer.

+ * 2. Redistributions in binary form must reproduce the above copyright

+ *    notice, this list of conditions and the following disclaimer in the

+ *    documentation and/or other materials provided with the distribution.

+ * 3. Neither the name of the University nor the names of its contributors

+ *    may be used to endorse or promote products derived from this software

+ *    without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

+ * SUCH DAMAGE.

+ *

+ *	@(#)kern_malloc.c	8.3 (Berkeley) 1/4/94

+ */

+#include <sys/param.h>

+#include <sys/proc.h>

+#include <sys/kernel.h>

+#include <sys/malloc.h>

+#include <sys/systm.h>

+#include <sys/sysctl.h>

+#include <uvm/uvm_extern.h>

+static struct vm_map_intrsafe kmem_map_store;

+struct vm_map *kmem_map = NULL;

+#ifdef NKMEMCLUSTERS

+#error NKMEMCLUSTERS is obsolete; remove it from your kernel config file and use NKMEMPAGES instead or let the kernel auto-size

+#endif

+/*

+ * Default number of pages in kmem_map.  We attempt to calculate this

+ * at run-time, but allow it to be either patched or set in the kernel

+ * config file.

+ */

+#ifndef NKMEMPAGES

+#define	NKMEMPAGES	0

+#endif

+int	nkmempages = NKMEMPAGES;

+/*

+ * Defaults for lower- and upper-bounds for the kmem_map page count.

+ * Can be overridden by kernel config options.

+ */

+#ifndef	NKMEMPAGES_MIN

+#define	NKMEMPAGES_MIN	NKMEMPAGES_MIN_DEFAULT

+#endif

+#ifndef NKMEMPAGES_MAX

+#define	NKMEMPAGES_MAX	NKMEMPAGES_MAX_DEFAULT

+#endif

+struct kmembuckets bucket[MINBUCKET + 16];

+struct kmemstats kmemstats[M_LAST];

+struct kmemusage *kmemusage;

+char *kmembase, *kmemlimit;

+char buckstring[16 * sizeof("123456,")];

+int buckstring_init = 0;

+#if defined(KMEMSTATS) || defined(DIAGNOSTIC) || defined(FFS_SOFTUPDATES)

+char *memname[] = INITKMEMNAMES;

+char *memall = NULL;

+extern struct lock sysctl_kmemlock;

+#endif

+#ifdef DIAGNOSTIC

+/*

+ * This structure provides a set of masks to catch unaligned frees.

+ */

+const long addrmask[] = { 0,

+	0x00000001, 0x00000003, 0x00000007, 0x0000000f,

+	0x0000001f, 0x0000003f, 0x0000007f, 0x000000ff,

+	0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff,

+	0x00001fff, 0x00003fff, 0x00007fff, 0x0000ffff,

+};

+/*

+ * The WEIRD_ADDR is used as known text to copy into free objects so

+ * that modifications after frees can be detected.

+ */

+#define WEIRD_ADDR	((unsigned) 0xdeadbeef)

+#define MAX_COPY	32

+/*

+ * Normally the freelist structure is used only to hold the list pointer

+ * for free objects.  However, when running with diagnostics, the first

+ * 8 bytes of the structure is unused except for diagnostic information,

+ * and the free list pointer is at offset 8 in the structure.  Since the

+ * first 8 bytes is the portion of the structure most often modified, this

+ * helps to detect memory reuse problems and avoid free list corruption.

+ */

+struct freelist {

+	int32_t	spare0;

+	int16_t	type;

+	int16_t	spare1;

+	caddr_t	next;

+};

+#else /* !DIAGNOSTIC */

+struct freelist {

+	caddr_t	next;

+};

+#endif /* DIAGNOSTIC */

+/*

+ * Allocate a block of memory

+ */

+void *

+malloc(size, type, flags)

+	unsigned long size;

+	int type, flags;

+{

+	register struct kmembuckets *kbp;

+	register struct kmemusage *kup;

+	register struct freelist *freep;

+	long indx, npg, allocsize;

+	int s;

+	caddr_t va, cp, savedlist;

+#ifdef DIAGNOSTIC

+	int32_t *end, *lp;

+	int copysize;

+	char *savedtype;

+#endif

+#ifdef KMEMSTATS

+	register struct kmemstats *ksp = &kmemstats[type];

+	if (((unsigned long)type) >= M_LAST)

+		panic("malloc - bogus type");

+#endif

+#ifdef MALLOC_DEBUG

+	if (debug_malloc(size, type, flags, (void **)&va))

+		return ((void *) va);

+#endif

+	indx = BUCKETINDX(size);

+	kbp = &bucket[indx];

+	s = splvm();

+#ifdef KMEMSTATS

+	while (ksp->ks_memuse >= ksp->ks_limit) {

+		if (flags & M_NOWAIT) {

+			splx(s);

+			return ((void *) NULL);

+		}

+		if (ksp->ks_limblocks < 65535)

+			ksp->ks_limblocks++;

+		tsleep((caddr_t)ksp, PSWP+2, memname[type], 0);

+	}

+	ksp->ks_size |= 1 << indx;

+#endif

+#ifdef DIAGNOSTIC

+	copysize = 1 << indx < MAX_COPY ? 1 << indx : MAX_COPY;

+#endif

+	if (kbp->kb_next == NULL) {

+		kbp->kb_last = NULL;

+		if (size > MAXALLOCSAVE)

+			allocsize = round_page(size);

+		else

+			allocsize = 1 << indx;

+		npg = btoc(allocsize);

+		va = (caddr_t) uvm_km_kmemalloc(kmem_map, uvmexp.kmem_object,

+				(vsize_t)ctob(npg),

+				(flags & M_NOWAIT) ? UVM_KMF_NOWAIT : 0);

+		if (va == NULL) {

+			/*

+			 * Kmem_malloc() can return NULL, even if it can

+			 * wait, if there is no map space available, because

+			 * it can't fix that problem.  Neither can we,

+			 * right now.  (We should release pages which

+			 * are completely free and which are in buckets

+			 * with too many free elements.)

+			 */

+			if ((flags & M_NOWAIT) == 0)

+				panic("malloc: out of space in kmem_map");

+			splx(s);

+			return ((void *) NULL);

+		}

+#ifdef KMEMSTATS

+		kbp->kb_total += kbp->kb_elmpercl;

+#endif

+		kup = btokup(va);

+		kup->ku_indx = indx;

+		if (allocsize > MAXALLOCSAVE) {

+			if (npg > 65535)

+				panic("malloc: allocation too large");

+			kup->ku_pagecnt = npg;

+#ifdef KMEMSTATS

+			ksp->ks_memuse += allocsize;

+#endif

+			goto out;

+		}

+#ifdef KMEMSTATS

+		kup->ku_freecnt = kbp->kb_elmpercl;

+		kbp->kb_totalfree += kbp->kb_elmpercl;

+#endif

+		/*

+		 * Just in case we blocked while allocating memory,

+		 * and someone else also allocated memory for this

+		 * bucket, don't assume the list is still empty.

+		 */

+		savedlist = kbp->kb_next;

+		kbp->kb_next = cp = va + (npg * PAGE_SIZE) - allocsize;

+		for (;;) {

+			freep = (struct freelist *)cp;

+#ifdef DIAGNOSTIC

+			/*

+			 * Copy in known text to detect modification

+			 * after freeing.

+			 */

+			end = (int32_t *)&cp[copysize];

+			for (lp = (int32_t *)cp; lp < end; lp++)

+				*lp = WEIRD_ADDR;

+			freep->type = M_FREE;

+#endif /* DIAGNOSTIC */

+			if (cp <= va)

+				break;

+			cp -= allocsize;

+			freep->next = cp;

+		}

+		freep->next = savedlist;

+		if (kbp->kb_last == NULL)

+			kbp->kb_last = (caddr_t)freep;

+	}

+	va = kbp->kb_next;

+	kbp->kb_next = ((struct freelist *)va)->next;

+#ifdef DIAGNOSTIC

+	freep = (struct freelist *)va;

+	savedtype = (unsigned)freep->type < M_LAST ?

+		memname[freep->type] : "???";

+	if (kbp->kb_next) {

+		int rv;

+		vaddr_t addr = (vaddr_t)kbp->kb_next;

+		vm_map_lock(kmem_map);

+		rv = uvm_map_checkprot(kmem_map, addr,

+		    addr + sizeof(struct freelist), VM_PROT_WRITE);

+		vm_map_unlock(kmem_map);

+		if (!rv)  {

+		printf("%s %d of object %p size 0x%lx %s %s (invalid addr %p)\n",

+			"Data modified on freelist: word",

+			(int32_t *)&kbp->kb_next - (int32_t *)kbp, va, size,

+			"previous type", savedtype, kbp->kb_next);

+		kbp->kb_next = NULL;

+		}

+	}

+	/* Fill the fields that we've used with WEIRD_ADDR */

+#if BYTE_ORDER == BIG_ENDIAN

+	freep->type = WEIRD_ADDR >> 16;

+#endif

+#if BYTE_ORDER == LITTLE_ENDIAN

+	freep->type = (short)WEIRD_ADDR;

+#endif

+	end = (int32_t *)&freep->next +

+	    (sizeof(freep->next) / sizeof(int32_t));

+	for (lp = (int32_t *)&freep->next; lp < end; lp++)

+		*lp = WEIRD_ADDR;

+	/* and check that the data hasn't been modified. */

+	end = (int32_t *)&va[copysize];

+	for (lp = (int32_t *)va; lp < end; lp++) {

+		if (*lp == WEIRD_ADDR)

+			continue;

+		printf("%s %d of object %p size 0x%lx %s %s (0x%x != 0x%x)\n",

+			"Data modified on freelist: word", lp - (int32_t *)va,

+			va, size, "previous type", savedtype, *lp, WEIRD_ADDR);

+		break;

+	}

+	freep->spare0 = 0;

+#endif /* DIAGNOSTIC */

+#ifdef KMEMSTATS

+	kup = btokup(va);

+	if (kup->ku_indx != indx)

+		panic("malloc: wrong bucket");

+	if (kup->ku_freecnt == 0)

+		panic("malloc: lost data");

+	kup->ku_freecnt--;

+	kbp->kb_totalfree--;

+	ksp->ks_memuse += 1 << indx;

+out:

+	kbp->kb_calls++;

+	ksp->ks_inuse++;

+	ksp->ks_calls++;

+	if (ksp->ks_memuse > ksp->ks_maxused)

+		ksp->ks_maxused = ksp->ks_memuse;

+#else

+out:

+#endif

+	splx(s);

+	return ((void *) va);

+}

+/*

+ * Free a block of memory allocated by malloc.

+ */

+void

+free(addr, type)

+	void *addr;

+	int type;

+{

+	register struct kmembuckets *kbp;

+	register struct kmemusage *kup;

+	register struct freelist *freep;

+	long size;

+	int s;

+#ifdef DIAGNOSTIC

+	caddr_t cp;

+	int32_t *end, *lp;

+	long alloc, copysize;

+#endif

+#ifdef KMEMSTATS

+	register struct kmemstats *ksp = &kmemstats[type];

+#endif

+#ifdef MALLOC_DEBUG

+	if (debug_free(addr, type))

+		return;

+#endif

+#ifdef DIAGNOSTIC

+	if (addr < (void *)kmembase || addr >= (void *)kmemlimit)

+		panic("free: non-malloced addr %p type %s", addr,

+		    memname[type]);

+#endif

+	kup = btokup(addr);

+	size = 1 << kup->ku_indx;

+	kbp = &bucket[kup->ku_indx];

+	s = splvm();

+#ifdef DIAGNOSTIC

+	/*

+	 * Check for returns of data that do not point to the

+	 * beginning of the allocation.

+	 */

+	if (size > PAGE_SIZE)

+		alloc = addrmask[BUCKETINDX(PAGE_SIZE)];

+	else

+		alloc = addrmask[kup->ku_indx];

+	if (((u_long)addr & alloc) != 0)

+		panic("free: unaligned addr %p, size %ld, type %s, mask %ld",

+			addr, size, memname[type], alloc);

+#endif /* DIAGNOSTIC */

+	if (size > MAXALLOCSAVE) {

+		uvm_km_free(kmem_map, (vaddr_t)addr, ctob(kup->ku_pagecnt));

+#ifdef KMEMSTATS

+		size = kup->ku_pagecnt << PGSHIFT;

+		ksp->ks_memuse -= size;

+		kup->ku_indx = 0;

+		kup->ku_pagecnt = 0;

+		if (ksp->ks_memuse + size >= ksp->ks_limit &&

+		    ksp->ks_memuse < ksp->ks_limit)

+			wakeup((caddr_t)ksp);

+		ksp->ks_inuse--;

+		kbp->kb_total -= 1;

+#endif

+		splx(s);

+		return;

+	}

+	freep = (struct freelist *)addr;

+#ifdef DIAGNOSTIC

+	/*

+	 * Check for multiple frees. Use a quick check to see if

+	 * it looks free before laboriously searching the freelist.

+	 */

+	if (freep->spare0 == WEIRD_ADDR) {

+		for (cp = kbp->kb_next; cp;

+		    cp = ((struct freelist *)cp)->next) {

+			if (addr != cp)

+				continue;

+			printf("multiply freed item %p\n", addr);

+			panic("free: duplicated free");

+		}

+	}

+	/*

+	 * Copy in known text to detect modification after freeing

+	 * and to make it look free. Also, save the type being freed

+	 * so we can list likely culprit if modification is detected

+	 * when the object is reallocated.

+	 */

+	copysize = size < MAX_COPY ? size : MAX_COPY;

+	end = (int32_t *)&((caddr_t)addr)[copysize];

+	for (lp = (int32_t *)addr; lp < end; lp++)

+		*lp = WEIRD_ADDR;

+	freep->type = type;

+#endif /* DIAGNOSTIC */

+#ifdef KMEMSTATS

+	kup->ku_freecnt++;

+	if (kup->ku_freecnt >= kbp->kb_elmpercl) {

+		if (kup->ku_freecnt > kbp->kb_elmpercl)

+			panic("free: multiple frees");

+		else if (kbp->kb_totalfree > kbp->kb_highwat)

+			kbp->kb_couldfree++;

+	}

+	kbp->kb_totalfree++;

+	ksp->ks_memuse -= size;

+	if (ksp->ks_memuse + size >= ksp->ks_limit &&

+	    ksp->ks_memuse < ksp->ks_limit)

+		wakeup((caddr_t)ksp);

+	ksp->ks_inuse--;

+#endif

+	if (kbp->kb_next == NULL)

+		kbp->kb_next = addr;

+	else

+		((struct freelist *)kbp->kb_last)->next = addr;

+	freep->next = NULL;

+	kbp->kb_last = addr;

+	splx(s);

+}

+/*

+ * Compute the number of pages that kmem_map will map, that is,

+ * the size of the kernel malloc arena.

+ */

+void

+kmeminit_nkmempages()

+{

+	int npages;

+	if (nkmempages != 0) {

+		/*

+		 * It's already been set (by us being here before, or

+		 * by patching or kernel config options), bail out now.

+		 */

+		return;

+	}

+	/*

+	 * We use the following (simple) formula:

+	 *

+	 *	- Starting point is physical memory / 4.

+	 *

+	 *	- Clamp it down to NKMEMPAGES_MAX.

+	 *

+	 *	- Round it up to NKMEMPAGES_MIN.

+	 */

+	npages = physmem / 4;

+	if (npages > NKMEMPAGES_MAX)

+		npages = NKMEMPAGES_MAX;

+	if (npages < NKMEMPAGES_MIN)

+		npages = NKMEMPAGES_MIN;

+	nkmempages = npages;

+}

+/*

+ * Initialize the kernel memory allocator

+ */

+void

+kmeminit()

+{

+	vaddr_t base, limit;

+#ifdef KMEMSTATS

+	long indx;

+#endif

+#ifdef DIAGNOSTIC

+	if (sizeof(struct freelist) > (1 << MINBUCKET))

+		panic("kmeminit: minbucket too small/struct freelist too big");

+#endif

+	/*

+	 * Compute the number of kmem_map pages, if we have not

+	 * done so already.

+	 */

+	kmeminit_nkmempages();

+	base = vm_map_min(kernel_map);

+	kmem_map = uvm_km_suballoc(kernel_map, &base, &limit,

+	    (vsize_t)(nkmempages * PAGE_SIZE), VM_MAP_INTRSAFE, FALSE,

+	    &kmem_map_store.vmi_map);

+	kmembase = (char *)base;

+	kmemlimit = (char *)limit;

+	kmemusage = (struct kmemusage *) uvm_km_zalloc(kernel_map,

+		(vsize_t)(nkmempages * sizeof(struct kmemusage)));

+#ifdef KMEMSTATS

+	for (indx = 0; indx < MINBUCKET + 16; indx++) {

+		if (1 << indx >= PAGE_SIZE)

+			bucket[indx].kb_elmpercl = 1;

+		else

+			bucket[indx].kb_elmpercl = PAGE_SIZE / (1 << indx);

+		bucket[indx].kb_highwat = 5 * bucket[indx].kb_elmpercl;

+	}

+	for (indx = 0; indx < M_LAST; indx++)

+		kmemstats[indx].ks_limit = nkmempages * PAGE_SIZE * 6 / 10;

+#endif

+#ifdef MALLOC_DEBUG

+	debug_malloc_init();

+#endif

+}

+/*

+ * Return kernel malloc statistics information.

+ */

+int

+sysctl_malloc(name, namelen, oldp, oldlenp, newp, newlen, p)

+	int *name;

+	u_int namelen;

+	void *oldp;

+	size_t *oldlenp;

+	void *newp;

+	size_t newlen;

+	struct proc *p;

+{

+	struct kmembuckets kb;

+	int i, siz;

+	if (namelen != 2 && name[0] != KERN_MALLOC_BUCKETS &&

+	    name[0] != KERN_MALLOC_KMEMNAMES)

+		return (ENOTDIR);		/* overloaded */

+	switch (name[0]) {

+	case KERN_MALLOC_BUCKETS:

+		/* Initialize the first time */

+		if (buckstring_init == 0) {

+			buckstring_init = 1;

+			bzero(buckstring, sizeof(buckstring));

+			for (siz = 0, i = MINBUCKET; i < MINBUCKET + 16; i++) {

+				snprintf(buckstring + siz,

+				    sizeof buckstring - siz,

+				    "%d,", (u_int)(1<<i));

+				siz += strlen(buckstring + siz);

+			}

+			/* Remove trailing comma */

+			if (siz)

+				buckstring[siz - 1] = '\0';

+		}

+		return (sysctl_rdstring(oldp, oldlenp, newp, buckstring));

+	case KERN_MALLOC_BUCKET:

+		bcopy(&bucket[BUCKETINDX(name[1])], &kb, sizeof(kb));

+		kb.kb_next = kb.kb_last = 0;

+		return (sysctl_rdstruct(oldp, oldlenp, newp, &kb, sizeof(kb)));

+	case KERN_MALLOC_KMEMSTATS:

+#ifdef KMEMSTATS

+		if ((name[1] < 0) || (name[1] >= M_LAST))

+			return (EINVAL);

+		return (sysctl_rdstruct(oldp, oldlenp, newp,

+		    &kmemstats[name[1]], sizeof(struct kmemstats)));

+#else

+		return (EOPNOTSUPP);

+#endif

+	case KERN_MALLOC_KMEMNAMES:

+#if defined(KMEMSTATS) || defined(DIAGNOSTIC) || defined(FFS_SOFTUPDATES)

+		if (memall == NULL) {

+			int totlen;

+			i = lockmgr(&sysctl_kmemlock, LK_EXCLUSIVE, NULL, p);

+			if (i)

+				return (i);

+			/* Figure out how large a buffer we need */

+			for (totlen = 0, i = 0; i < M_LAST; i++) {

+				if (memname[i])

+					totlen += strlen(memname[i]);

+				totlen++;

+			}

+			memall = malloc(totlen + M_LAST, M_SYSCTL, M_WAITOK);

+			bzero(memall, totlen + M_LAST);

+			for (siz = 0, i = 0; i < M_LAST; i++) {

+				snprintf(memall + siz,

+				    totlen + M_LAST - siz,

+				    "%s,", memname[i] ? memname[i] : "");

+				siz += strlen(memall + siz);

+			}

+			/* Remove trailing comma */

+			if (siz)

+				memall[siz - 1] = '\0';

+			/* Now, convert all spaces to underscores */

+			for (i = 0; i < totlen; i++)

+				if (memall[i] == ' ')

+					memall[i] = '_';

+			lockmgr(&sysctl_kmemlock, LK_RELEASE, NULL, p);

+		}

+		return (sysctl_rdstring(oldp, oldlenp, newp, memall));

+#else

+		return (EOPNOTSUPP);

+#endif

+	default:

+		return (EOPNOTSUPP);

+	}

+	/* NOTREACHED */

+}

+/*

+ * Round up a size to how much malloc would actually allocate.

+ */

+size_t

+malloc_roundup(size_t sz)

+{

+	if (sz > MAXALLOCSAVE)

+		return round_page(sz);

+	return (1 << BUCKETINDX(sz));

+}

--- a/sys/src/cmd/diff/test/diff-t9.1

+++ /dev/null

@@ -1,2045 +1,0 @@

-/*	$NetBSD: vfs_syscalls.c,v 1.57 1995/10/07 06:28:51 mycroft Exp $	*/

-/*

- * Copyright (c) 1989, 1993

- *	The Regents of the University of California.  All rights reserved.

- * (c) UNIX System Laboratories, Inc.

- * All or some portions of this file are derived from material licensed

- * to the University of California by American Telephone and Telegraph

- * Co. or Unix System Laboratories, Inc. and are reproduced herein with

- * the permission of UNIX System Laboratories, Inc.

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in the

- *    documentation and/or other materials provided with the distribution.

- * 3. All advertising materials mentioning features or use of this software

- *    must display the following acknowledgement:

- *	This product includes software developed by the University of

- *	California, Berkeley and its contributors.

- * 4. Neither the name of the University nor the names of its contributors

- *    may be used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

- * SUCH DAMAGE.

- *

- *	@(#)vfs_syscalls.c	8.28 (Berkeley) 12/10/94

- */

-#include <sys/param.h>

-#include <sys/systm.h>

-#include <sys/namei.h>

-#include <sys/filedesc.h>

-#include <sys/kernel.h>

-#include <sys/file.h>

-#include <sys/stat.h>

-#include <sys/vnode.h>

-#include <sys/mount.h>

-#include <sys/proc.h>

-#include <sys/uio.h>

-#include <sys/malloc.h>

-#include <sys/dirent.h>

-#include <sys/syscallargs.h>

-#include <vm/vm.h>

-#include <sys/sysctl.h>

-static int change_dir __P((struct nameidata *ndp, struct proc *p));

-/*

- * Virtual File System System Calls

- */

-/*

- * Mount a file system.

- */

-/* ARGSUSED */

-sys_mount(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mount_args /* {

-		syscallarg(char *) type;

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-		syscallarg(caddr_t) data;

-	} */ *uap = v;

-	register struct vnode *vp;

-	register struct mount *mp;

-	int error, flag;

-	u_long fsindex;

-	char fstypename[MFSNAMELEN];

-	struct vattr va;

-	struct nameidata nd;

-	/*

-	 * Get vnode to be covered

-	 */

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (SCARG(uap, flags) & MNT_UPDATE) {

-		if ((vp->v_flag & VROOT) == 0) {

-			vput(vp);

-			return (EINVAL);

-		}

-		mp = vp->v_mount;

-		flag = mp->mnt_flag;

-		/*

-		 * We only allow the filesystem to be reloaded if it

-		 * is currently mounted read-only.

-		 */

-		if ((SCARG(uap, flags) & MNT_RELOAD) &&

-		    ((mp->mnt_flag & MNT_RDONLY) == 0)) {

-			vput(vp);

-			return (EOPNOTSUPP);	/* Needs translation */

-		}

-		mp->mnt_flag |=

-		    SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);

-		/*

-		 * Only root, or the user that did the original mount is

-		 * permitted to update it.

-		 */

-		if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&

-		    (error = suser(p->p_ucred, &p->p_acflag))) {

-			vput(vp);

-			return (error);

-		}

-		/*

-		 * Do not allow NFS export by non-root users. Silently

-		 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

-		 */

-		if (p->p_ucred->cr_uid != 0) {

-			if (SCARG(uap, flags) & MNT_EXPORTED) {

-				vput(vp);

-				return (EPERM);

-			}

-			SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

-		}

-		VOP_UNLOCK(vp);

-		goto update;

-	}

-	/*

-	 * If the user is not root, ensure that they own the directory

-	 * onto which we are attempting to mount.

-	 */

-	if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||

-	    (va.va_uid != p->p_ucred->cr_uid &&

-	     (error = suser(p->p_ucred, &p->p_acflag)))) {

-		vput(vp);

-		return (error);

-	}

-	/*

-	 * Do not allow NFS export by non-root users. Silently

-	 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

-	 */

-	if (p->p_ucred->cr_uid != 0) {

-		if (SCARG(uap, flags) & MNT_EXPORTED) {

-			vput(vp);

-			return (EPERM);

-		}

-		SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

-	}

-	if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))

-		return (error);

-	if (vp->v_type != VDIR) {

-		vput(vp);

-		return (ENOTDIR);

-	}

-	if (error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN,

-	    (size_t *)0)) {

-#if defined(COMPAT_09) || defined(COMPAT_43)

-		/*

-		 * Historically filesystem types were identified by number.

-		 * If we get an integer for the filesystem type instead of a

-		 * string, we check to see if it matches one of the historic

-		 * filesystem types.

-		 */

-		fsindex = (u_long)SCARG(uap, type);

-		if (fsindex >= nvfssw || vfssw[fsindex] == NULL) {

-			vput(vp);

-			return (ENODEV);

-		}

-		strncpy(fstypename, vfssw[fsindex]->vfs_name, MFSNAMELEN);

-#else

-		vput(vp);

-		return (error);

-#endif

-	}

-	for (fsindex = 0; fsindex < nvfssw; fsindex++)

-		if (vfssw[fsindex] != NULL &&

-		    !strncmp(vfssw[fsindex]->vfs_name, fstypename, MFSNAMELEN))

-			break;

-	if (fsindex >= nvfssw) {

-		vput(vp);

-		return (ENODEV);

-	}

-	if (vp->v_mountedhere != NULL) {

-		vput(vp);

-		return (EBUSY);

-	}

-	/*

-	 * Allocate and initialize the file system.

-	 */

-	mp = (struct mount *)malloc((u_long)sizeof(struct mount),

-		M_MOUNT, M_WAITOK);

-	bzero((char *)mp, (u_long)sizeof(struct mount));

-	mp->mnt_op = vfssw[fsindex];

-	if (error = vfs_lock(mp)) {

-		free((caddr_t)mp, M_MOUNT);

-		vput(vp);

-		return (error);

-	}

-	/* Do this early in case we block later. */

-	vfssw[fsindex]->vfs_refcount++;

-	vp->v_mountedhere = mp;

-	mp->mnt_vnodecovered = vp;

-	mp->mnt_stat.f_owner = p->p_ucred->cr_uid;

-update:

-	/*

-	 * Set the mount level flags.

-	 */

-	if (SCARG(uap, flags) & MNT_RDONLY)

-		mp->mnt_flag |= MNT_RDONLY;

-	else if (mp->mnt_flag & MNT_RDONLY)

-		mp->mnt_flag |= MNT_WANTRDWR;

-	mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |

-	    MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);

-	mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |

-	    MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);

-	/*

-	 * Mount the filesystem.

-	 */

-	error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);

-	if (mp->mnt_flag & MNT_UPDATE) {

-		vrele(vp);

-		if (mp->mnt_flag & MNT_WANTRDWR)

-			mp->mnt_flag &= ~MNT_RDONLY;

-		mp->mnt_flag &=~

-		    (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);

-		if (error)

-			mp->mnt_flag = flag;

-		return (error);

-	}

-	/*

-	 * Put the new filesystem on the mount list after root.

-	 */

-	cache_purge(vp);

-	if (!error) {

-		TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);

-		checkdirs(vp);

-		VOP_UNLOCK(vp);

-		vfs_unlock(mp);

-		(void) VFS_STATFS(mp, &mp->mnt_stat, p);

-		error = VFS_START(mp, 0, p);

-	} else {

-		mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;

-		vfssw[fsindex]->vfs_refcount--;

-		vfs_unlock(mp);

-		free((caddr_t)mp, M_MOUNT);

-		vput(vp);

-	}

-	return (error);

-}

-/*

- * Scan all active processes to see if any of them have a current

- * or root directory onto which the new filesystem has just been

- * mounted. If so, replace them with the new mount point.

- */

-checkdirs(olddp)

-	struct vnode *olddp;

-{

-	struct filedesc *fdp;

-	struct vnode *newdp;

-	struct proc *p;

-	if (olddp->v_usecount == 1)

-		return;

-	if (VFS_ROOT(olddp->v_mountedhere, &newdp))

-		panic("mount: lost mount");

-	for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {

-		fdp = p->p_fd;

-		if (fdp->fd_cdir == olddp) {

-			vrele(fdp->fd_cdir);

-			VREF(newdp);

-			fdp->fd_cdir = newdp;

-		}

-		if (fdp->fd_rdir == olddp) {

-			vrele(fdp->fd_rdir);

-			VREF(newdp);

-			fdp->fd_rdir = newdp;

-		}

-	}

-	if (rootvnode == olddp) {

-		vrele(rootvnode);

-		VREF(newdp);

-		rootvnode = newdp;

-	}

-	vput(newdp);

-}

-/*

- * Unmount a file system.

- *

- * Note: unmount takes a path to the vnode mounted on as argument,

- * not special file (as before).

- */

-/* ARGSUSED */

-sys_unmount(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_unmount_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct mount *mp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	mp = vp->v_mount;

-	/*

-	 * Only root, or the user that did the original mount is

-	 * permitted to unmount this filesystem.

-	 */

-	if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&

-	    (error = suser(p->p_ucred, &p->p_acflag))) {

-		vput(vp);

-		return (error);

-	}

-	/*

-	 * Don't allow unmounting the root file system.

-	 */

-	if (mp->mnt_flag & MNT_ROOTFS) {

-		vput(vp);

-		return (EINVAL);

-	}

-	/*

-	 * Must be the root of the filesystem

-	 */

-	if ((vp->v_flag & VROOT) == 0) {

-		vput(vp);

-		return (EINVAL);

-	}

-	vput(vp);

-	return (dounmount(mp, SCARG(uap, flags), p));

-}

-/*

- * Do the actual file system unmount.

- */

-dounmount(mp, flags, p)

-	register struct mount *mp;

-	int flags;

-	struct proc *p;

-{

-	struct vnode *coveredvp;

-	int error;

-	coveredvp = mp->mnt_vnodecovered;

-	if (vfs_busy(mp))

-		return (EBUSY);

-	mp->mnt_flag |= MNT_UNMOUNT;

-	if (error = vfs_lock(mp))

-		return (error);

-	mp->mnt_flag &=~ MNT_ASYNC;

-	vnode_pager_umount(mp);	/* release cached vnodes */

-	cache_purgevfs(mp);	/* remove cache entries for this file sys */

-	if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 ||

-	    (flags & MNT_FORCE))

-		error = VFS_UNMOUNT(mp, flags, p);

-	mp->mnt_flag &= ~MNT_UNMOUNT;

-	vfs_unbusy(mp);

-	if (error) {

-		vfs_unlock(mp);

-	} else {

-		TAILQ_REMOVE(&mountlist, mp, mnt_list);

-		if (coveredvp != NULLVP) {

-			vrele(coveredvp);

-			coveredvp->v_mountedhere = (struct mount *)0;

-		}

-		mp->mnt_op->vfs_refcount--;

-		vfs_unlock(mp);

-		if (mp->mnt_vnodelist.lh_first != NULL)

-			panic("unmount: dangling vnode");

-		free((caddr_t)mp, M_MOUNT);

-	}

-	return (error);

-}

-/*

- * Sync each mounted filesystem.

- */

-#ifdef DEBUG

-int syncprt = 0;

-struct ctldebug debug0 = { "syncprt", &syncprt };

-#endif

-/* ARGSUSED */

-sys_sync(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct mount *mp, *nmp;

-	int asyncflag;

-	for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {

-		/*

-		 * Get the next pointer in case we hang on vfs_busy

-		 * while we are being unmounted.

-		 */

-		nmp = mp->mnt_list.cqe_next;

-		/*

-		 * The lock check below is to avoid races with mount

-		 * and unmount.

-		 */

-		if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 &&

-		    !vfs_busy(mp)) {

-			asyncflag = mp->mnt_flag & MNT_ASYNC;

-			mp->mnt_flag &= ~MNT_ASYNC;

-			VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);

-			if (asyncflag)

-				mp->mnt_flag |= MNT_ASYNC;

-			/*

-			 * Get the next pointer again, as the next filesystem

-			 * might have been unmounted while we were sync'ing.

-			 */

-			nmp = mp->mnt_list.cqe_next;

-			vfs_unbusy(mp);

-		}

-	}

-#ifdef DEBUG

-	if (syncprt)

-		vfs_bufstats();

-#endif /* DEBUG */

-	return (0);

-}

-/*

- * Change filesystem quotas.

- */

-/* ARGSUSED */

-sys_quotactl(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_quotactl_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) cmd;

-		syscallarg(int) uid;

-		syscallarg(caddr_t) arg;

-	} */ *uap = v;

-	register struct mount *mp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	mp = nd.ni_vp->v_mount;

-	vrele(nd.ni_vp);

-	return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),

-	    SCARG(uap, arg), p));

-}

-/*

- * Get filesystem statistics.

- */

-/* ARGSUSED */

-sys_statfs(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_statfs_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct statfs *) buf;

-	} */ *uap = v;

-	register struct mount *mp;

-	register struct statfs *sp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	mp = nd.ni_vp->v_mount;

-	sp = &mp->mnt_stat;

-	vrele(nd.ni_vp);

-	if (error = VFS_STATFS(mp, sp, p))

-		return (error);

-	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

-}

-/*

- * Get filesystem statistics.

- */

-/* ARGSUSED */

-sys_fstatfs(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fstatfs_args /* {

-		syscallarg(int) fd;

-		syscallarg(struct statfs *) buf;

-	} */ *uap = v;

-	struct file *fp;

-	struct mount *mp;

-	register struct statfs *sp;

-	int error;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	mp = ((struct vnode *)fp->f_data)->v_mount;

-	sp = &mp->mnt_stat;

-	if (error = VFS_STATFS(mp, sp, p))

-		return (error);

-	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

-}

-/*

- * Get statistics on all filesystems.

- */

-sys_getfsstat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_getfsstat_args /* {

-		syscallarg(struct statfs *) buf;

-		syscallarg(long) bufsize;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct mount *mp, *nmp;

-	register struct statfs *sp;

-	caddr_t sfsp;

-	long count, maxcount, error;

-	maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);

-	sfsp = (caddr_t)SCARG(uap, buf);

-	for (count = 0,

-	     mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {

-		nmp = mp->mnt_list.cqe_next;

-		if (sfsp && count < maxcount &&

-		    ((mp->mnt_flag & MNT_MLOCK) == 0)) {

-			sp = &mp->mnt_stat;

-			/*

-			 * If MNT_NOWAIT is specified, do not refresh the

-			 * fsstat cache. MNT_WAIT overrides MNT_NOWAIT.

-			 */

-			if (((SCARG(uap, flags) & MNT_NOWAIT) == 0 ||

-			    (SCARG(uap, flags) & MNT_WAIT)) &&

-			    (error = VFS_STATFS(mp, sp, p)))

-				continue;

-			sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-			if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp)))

-				return (error);

-			sfsp += sizeof(*sp);

-		}

-		count++;

-	}

-	if (sfsp && count > maxcount)

-		*retval = maxcount;

-	else

-		*retval = count;

-	return (0);

-}

-/*

- * Change current working directory to a given file descriptor.

- */

-/* ARGSUSED */

-sys_fchdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fchdir_args /* {

-		syscallarg(int) fd;

-	} */ *uap = v;

-	register struct filedesc *fdp = p->p_fd;

-	struct vnode *vp, *tdp;

-	struct mount *mp;

-	struct file *fp;

-	int error;

-	if (error = getvnode(fdp, SCARG(uap, fd), &fp))

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VREF(vp);

-	VOP_LOCK(vp);

-	if (vp->v_type != VDIR)

-		error = ENOTDIR;

-	else

-		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

-	while (!error && (mp = vp->v_mountedhere) != NULL) {

-		if (mp->mnt_flag & MNT_MLOCK) {

-			mp->mnt_flag |= MNT_MWAIT;

-			sleep((caddr_t)mp, PVFS);

-			continue;

-		}

-		if (error = VFS_ROOT(mp, &tdp))

-			break;

-		vput(vp);

-		vp = tdp;

-	}

-	VOP_UNLOCK(vp);

-	if (error) {

-		vrele(vp);

-		return (error);

-	}

-	vrele(fdp->fd_cdir);

-	fdp->fd_cdir = vp;

-	return (0);

-}

-/*

- * Change current working directory (``.'').

- */

-/* ARGSUSED */

-sys_chdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_chdir_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct filedesc *fdp = p->p_fd;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = change_dir(&nd, p))

-		return (error);

-	vrele(fdp->fd_cdir);

-	fdp->fd_cdir = nd.ni_vp;

-	return (0);

-}

-/*

- * Change notion of root (``/'') directory.

- */

-/* ARGSUSED */

-sys_chroot(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_chroot_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct filedesc *fdp = p->p_fd;

-	int error;

-	struct nameidata nd;

-	if (error = suser(p->p_ucred, &p->p_acflag))

-		return (error);

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = change_dir(&nd, p))

-		return (error);

-	if (fdp->fd_rdir != NULL)

-		vrele(fdp->fd_rdir);

-	fdp->fd_rdir = nd.ni_vp;

-	return (0);

-}

-/*

- * Common routine for chroot and chdir.

- */

-static int

-change_dir(ndp, p)

-	register struct nameidata *ndp;

-	struct proc *p;

-{

-	struct vnode *vp;

-	int error;

-	if (error = namei(ndp))

-		return (error);

-	vp = ndp->ni_vp;

-	if (vp->v_type != VDIR)

-		error = ENOTDIR;

-	else

-		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

-	VOP_UNLOCK(vp);

-	if (error)

-		vrele(vp);

-	return (error);

-}

-/*

- * Check permissions, allocate an open file structure,

- * and call the device open routine if any.

- */

-sys_open(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_open_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	register struct filedesc *fdp = p->p_fd;

-	register struct file *fp;

-	register struct vnode *vp;

-	int flags, cmode;

-	struct file *nfp;

-	int type, indx, error;

-	struct flock lf;

-	struct nameidata nd;

-	extern struct fileops vnops;

-	if (error = falloc(p, &nfp, &indx))

-		return (error);

-	fp = nfp;

-	flags = FFLAGS(SCARG(uap, flags));

-	cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	p->p_dupfd = -indx - 1;			/* XXX check for fdopen */

-	if (error = vn_open(&nd, flags, cmode)) {

-		ffree(fp);

-		if ((error == ENODEV || error == ENXIO) &&

-		    p->p_dupfd >= 0 &&			/* XXX from fdopen */

-		    (error =

-			dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {

-			*retval = indx;

-			return (0);

-		}

-		if (error == ERESTART)

-			error = EINTR;

-		fdp->fd_ofiles[indx] = NULL;

-		return (error);

-	}

-	p->p_dupfd = 0;

-	vp = nd.ni_vp;

-	fp->f_flag = flags & FMASK;

-	fp->f_type = DTYPE_VNODE;

-	fp->f_ops = &vnops;

-	fp->f_data = (caddr_t)vp;

-	if (flags & (O_EXLOCK | O_SHLOCK)) {

-		lf.l_whence = SEEK_SET;

-		lf.l_start = 0;

-		lf.l_len = 0;

-		if (flags & O_EXLOCK)

-			lf.l_type = F_WRLCK;

-		else

-			lf.l_type = F_RDLCK;

-		type = F_FLOCK;

-		if ((flags & FNONBLOCK) == 0)

-			type |= F_WAIT;

-		VOP_UNLOCK(vp);

-		if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) {

-			(void) vn_close(vp, fp->f_flag, fp->f_cred, p);

-			ffree(fp);

-			fdp->fd_ofiles[indx] = NULL;

-			return (error);

-		}

-		VOP_LOCK(vp);

-		fp->f_flag |= FHASLOCK;

-	}

-	VOP_UNLOCK(vp);

-	*retval = indx;

-	return (0);

-}

-/*

- * Create a special file.

- */

-/* ARGSUSED */

-sys_mknod(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mknod_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-		syscallarg(int) dev;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	int whiteout;

-	struct nameidata nd;

-	if (error = suser(p->p_ucred, &p->p_acflag))

-		return (error);

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (vp != NULL)

-		error = EEXIST;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

-		vattr.va_rdev = SCARG(uap, dev);

-		whiteout = 0;

-		switch (SCARG(uap, mode) & S_IFMT) {

-		case S_IFMT:	/* used by badsect to flag bad sectors */

-			vattr.va_type = VBAD;

-			break;

-		case S_IFCHR:

-			vattr.va_type = VCHR;

-			break;

-		case S_IFBLK:

-			vattr.va_type = VBLK;

-			break;

-		case S_IFWHT:

-			whiteout = 1;

-			break;

-		default:

-			error = EINVAL;

-			break;

-		}

-	}

-	if (!error) {

-		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		if (whiteout) {

-			error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);

-			if (error)

-				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-			vput(nd.ni_dvp);

-		} else {

-			error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,

-						&nd.ni_cnd, &vattr);

-		}

-	} else {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		if (vp)

-			vrele(vp);

-	}

-	return (error);

-}

-/*

- * Create a named pipe.

- */

-/* ARGSUSED */

-sys_mkfifo(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mkfifo_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-#ifndef FIFO

-	return (EOPNOTSUPP);

-#else

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	if (nd.ni_vp != NULL) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(nd.ni_vp);

-		return (EEXIST);

-	}

-	VATTR_NULL(&vattr);

-	vattr.va_type = VFIFO;

-	vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));

-#endif /* FIFO */

-}

-/*

- * Make a hard file link.

- */

-/* ARGSUSED */

-sys_link(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_link_args /* {

-		syscallarg(char *) path;

-		syscallarg(char *) link;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct nameidata nd;

-	int error;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (vp->v_type != VDIR ||

-	    (error = suser(p->p_ucred, &p->p_acflag)) == 0) {

-		nd.ni_cnd.cn_nameiop = CREATE;

-		nd.ni_cnd.cn_flags = LOCKPARENT;

-		nd.ni_dirp = SCARG(uap, link);

-		if ((error = namei(&nd)) == 0) {

-			if (nd.ni_vp != NULL)

-				error = EEXIST;

-			if (!error) {

-				VOP_LEASE(nd.ni_dvp, p, p->p_ucred,

-				    LEASE_WRITE);

-				VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-				error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);

-			} else {

-				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-				if (nd.ni_dvp == nd.ni_vp)

-					vrele(nd.ni_dvp);

-				else

-					vput(nd.ni_dvp);

-				if (nd.ni_vp)

-					vrele(nd.ni_vp);

-			}

-		}

-	}

-	vrele(vp);

-	return (error);

-}

-/*

- * Make a symbolic link.

- */

-/* ARGSUSED */

-sys_symlink(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_symlink_args /* {

-		syscallarg(char *) path;

-		syscallarg(char *) link;

-	} */ *uap = v;

-	struct vattr vattr;

-	char *path;

-	int error;

-	struct nameidata nd;

-	MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);

-	if (error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, (size_t *)0))

-		goto out;

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);

-	if (error = namei(&nd))

-		goto out;

-	if (nd.ni_vp) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(nd.ni_vp);

-		error = EEXIST;

-		goto out;

-	}

-	VATTR_NULL(&vattr);

-	vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);

-out:

-	FREE(path, M_NAMEI);

-	return (error);

-}

-/*

- * Delete a whiteout from the filesystem.

- */

-/* ARGSUSED */

-sys_undelete(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_undelete_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	error = namei(&nd);

-	if (error)

-		return (error);

-	if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		if (nd.ni_vp)

-			vrele(nd.ni_vp);

-		return (EEXIST);

-	}

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	if (error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE))

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-	vput(nd.ni_dvp);

-	return (error);

-}

-/*

- * Delete a name from the filesystem.

- */

-/* ARGSUSED */

-sys_unlink(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_unlink_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct vnode *vp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_type != VDIR ||

-	    (error = suser(p->p_ucred, &p->p_acflag)) == 0) {

-		/*

-		 * The root of a mounted filesystem cannot be deleted.

-		 */

-		if (vp->v_flag & VROOT)

-			error = EBUSY;

-		else

-			(void)vnode_pager_uncache(vp);

-	}

-	if (!error) {

-		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

-	} else {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		if (vp != NULLVP)

-			vput(vp);

-	}

-	return (error);

-}

-/*

- * Reposition read/write file offset.

- */

-sys_lseek(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_lseek_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) pad;

-		syscallarg(off_t) offset;

-		syscallarg(int) whence;

-	} */ *uap = v;

-	struct ucred *cred = p->p_ucred;

-	register struct filedesc *fdp = p->p_fd;

-	register struct file *fp;

-	struct vattr vattr;

-	int error;

-	if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||

-	    (fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL)

-		return (EBADF);

-	if (fp->f_type != DTYPE_VNODE)

-		return (ESPIPE);

-	switch (SCARG(uap, whence)) {

-	case L_INCR:

-		fp->f_offset += SCARG(uap, offset);

-		break;

-	case L_XTND:

-		if (error =

-		    VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p))

-			return (error);

-		fp->f_offset = SCARG(uap, offset) + vattr.va_size;

-		break;

-	case L_SET:

-		fp->f_offset = SCARG(uap, offset);

-		break;

-	default:

-		return (EINVAL);

-	}

-	*(off_t *)retval = fp->f_offset;

-	return (0);

-}

-/*

- * Check access permissions.

- */

-sys_access(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_access_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct ucred *cred = p->p_ucred;

-	register struct vnode *vp;

-	int error, flags, t_gid, t_uid;

-	struct nameidata nd;

-	t_uid = cred->cr_uid;

-	t_gid = cred->cr_gid;

-	cred->cr_uid = p->p_cred->p_ruid;

-	cred->cr_gid = p->p_cred->p_rgid;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		goto out1;

-	vp = nd.ni_vp;

-	/* Flags == 0 means only check for existence. */

-	if (SCARG(uap, flags)) {

-		flags = 0;

-		if (SCARG(uap, flags) & R_OK)

-			flags |= VREAD;

-		if (SCARG(uap, flags) & W_OK)

-			flags |= VWRITE;

-		if (SCARG(uap, flags) & X_OK)

-			flags |= VEXEC;

-		if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)

-			error = VOP_ACCESS(vp, flags, cred, p);

-	}

-	vput(vp);

-out1:

-	cred->cr_uid = t_uid;

-	cred->cr_gid = t_gid;

-	return (error);

-}

-/*

- * Get file status; this version follows links.

- */

-/* ARGSUSED */

-sys_stat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_stat_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct stat *) ub;

-	} */ *uap = v;

-	struct stat sb;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	error = vn_stat(nd.ni_vp, &sb, p);

-	vput(nd.ni_vp);

-	if (error)

-		return (error);

-	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

-	return (error);

-}

-/*

- * Get file status; this version does not follow links.

- */

-/* ARGSUSED */

-sys_lstat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_lstat_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct stat *) ub;

-	} */ *uap = v;

-	int error;

-	struct vnode *vp, *dvp;

-	struct stat sb, sb1;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	/*

-	 * For symbolic links, always return the attributes of its

-	 * containing directory, except for mode, size, and links.

-	 */

-	vp = nd.ni_vp;

-	dvp = nd.ni_dvp;

-	if (vp->v_type != VLNK) {

-		if (dvp == vp)

-			vrele(dvp);

-		else

-			vput(dvp);

-		error = vn_stat(vp, &sb, p);

-		vput(vp);

-		if (error)

-			return (error);

-	} else {

-		error = vn_stat(dvp, &sb, p);

-		vput(dvp);

-		if (error) {

-			vput(vp);

-			return (error);

-		}

-		error = vn_stat(vp, &sb1, p);

-		vput(vp);

-		if (error)

-			return (error);

-		sb.st_mode &= ~S_IFDIR;

-		sb.st_mode |= S_IFLNK;

-		sb.st_nlink = sb1.st_nlink;

-		sb.st_size = sb1.st_size;

-		sb.st_blocks = sb1.st_blocks;

-	}

-	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

-	return (error);

-}

-/*

- * Get configurable pathname variables.

- */

-/* ARGSUSED */

-sys_pathconf(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_pathconf_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) name;

-	} */ *uap = v;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);

-	vput(nd.ni_vp);

-	return (error);

-}

-/*

- * Return target name of a symbolic link.

- */

-/* ARGSUSED */

-sys_readlink(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_readlink_args /* {

-		syscallarg(char *) path;

-		syscallarg(char *) buf;

-		syscallarg(int) count;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct iovec aiov;

-	struct uio auio;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (vp->v_type != VLNK)

-		error = EINVAL;

-	else {

-		aiov.iov_base = SCARG(uap, buf);

-		aiov.iov_len = SCARG(uap, count);

-		auio.uio_iov = &aiov;

-		auio.uio_iovcnt = 1;

-		auio.uio_offset = 0;

-		auio.uio_rw = UIO_READ;

-		auio.uio_segflg = UIO_USERSPACE;

-		auio.uio_procp = p;

-		auio.uio_resid = SCARG(uap, count);

-		error = VOP_READLINK(vp, &auio, p->p_ucred);

-	}

-	vput(vp);

-	*retval = SCARG(uap, count) - auio.uio_resid;

-	return (error);

-}

-/*

- * Change flags of a file given a path name.

- */

-/* ARGSUSED */

-sys_chflags(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_chflags_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_flags = SCARG(uap, flags);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Change flags of a file given a file descriptor.

- */

-/* ARGSUSED */

-sys_fchflags(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fchflags_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_flags = SCARG(uap, flags);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	VOP_UNLOCK(vp);

-	return (error);

-}

-/*

- * Change mode of a file given path name.

- */

-/* ARGSUSED */

-sys_chmod(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_chmod_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Change mode of a file given a file descriptor.

- */

-/* ARGSUSED */

-sys_fchmod(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fchmod_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	VOP_UNLOCK(vp);

-	return (error);

-}

-/*

- * Set ownership given a path name.

- */

-/* ARGSUSED */

-sys_chown(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_chown_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) uid;

-		syscallarg(int) gid;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_uid = SCARG(uap, uid);

-		vattr.va_gid = SCARG(uap, gid);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Set ownership given a file descriptor.

- */

-/* ARGSUSED */

-sys_fchown(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fchown_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) uid;

-		syscallarg(int) gid;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_uid = SCARG(uap, uid);

-		vattr.va_gid = SCARG(uap, gid);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	VOP_UNLOCK(vp);

-	return (error);

-}

-/*

- * Set the access and modification times of a file.

- */

-/* ARGSUSED */

-sys_utimes(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_utimes_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct timeval *) tptr;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct timeval tv[2];

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	VATTR_NULL(&vattr);

-	if (SCARG(uap, tptr) == NULL) {

-		microtime(&tv[0]);

-		tv[1] = tv[0];

-		vattr.va_vaflags |= VA_UTIMES_NULL;

-	} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,

-	    sizeof (tv)))

-  		return (error);

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		vattr.va_atime.ts_sec = tv[0].tv_sec;

-		vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000;

-		vattr.va_mtime.ts_sec = tv[1].tv_sec;

-		vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Truncate a file given its path name.

- */

-/* ARGSUSED */

-sys_truncate(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_truncate_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) pad;

-		syscallarg(off_t) length;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_type == VDIR)

-		error = EISDIR;

-	else if ((error = vn_writechk(vp)) == 0 &&

-	    (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {

-		VATTR_NULL(&vattr);

-		vattr.va_size = SCARG(uap, length);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Truncate a file given a file descriptor.

- */

-/* ARGSUSED */

-sys_ftruncate(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_ftruncate_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) pad;

-		syscallarg(off_t) length;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	if ((fp->f_flag & FWRITE) == 0)

-		return (EINVAL);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LOCK(vp);

-	if (vp->v_type == VDIR)

-		error = EISDIR;

-	else if ((error = vn_writechk(vp)) == 0) {

-		VATTR_NULL(&vattr);

-		vattr.va_size = SCARG(uap, length);

-		error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);

-	}

-	VOP_UNLOCK(vp);

-	return (error);

-}

-/*

- * Sync an open file.

- */

-/* ARGSUSED */

-sys_fsync(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fsync_args /* {

-		syscallarg(int) fd;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct file *fp;

-	int error;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LOCK(vp);

-	error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);

-	VOP_UNLOCK(vp);

-	return (error);

-}

-/*

- * Rename files.  Source and destination must either both be directories,

- * or both not be directories.  If target is a directory, it must be empty.

- */

-/* ARGSUSED */

-sys_rename(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_rename_args /* {

-		syscallarg(char *) from;

-		syscallarg(char *) to;

-	} */ *uap = v;

-	register struct vnode *tvp, *fvp, *tdvp;

-	struct nameidata fromnd, tond;

-	int error;

-	NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,

-	    SCARG(uap, from), p);

-	if (error = namei(&fromnd))

-		return (error);

-	fvp = fromnd.ni_vp;

-	NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,

-	    UIO_USERSPACE, SCARG(uap, to), p);

-	if (error = namei(&tond)) {

-		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

-		vrele(fromnd.ni_dvp);

-		vrele(fvp);

-		goto out1;

-	}

-	tdvp = tond.ni_dvp;

-	tvp = tond.ni_vp;

-	if (tvp != NULL) {

-		if (fvp->v_type == VDIR && tvp->v_type != VDIR) {

-			error = ENOTDIR;

-			goto out;

-		} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {

-			error = EISDIR;

-			goto out;

-		}

-	}

-	if (fvp == tdvp)

-		error = EINVAL;

-	/*

-	 * If source is the same as the destination (that is the

-	 * same inode number with the same name in the same directory),

-	 * then there is nothing to do.

-	 */

-	if (fvp == tvp && fromnd.ni_dvp == tdvp &&

-	    fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&

-	    !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,

-	      fromnd.ni_cnd.cn_namelen))

-		error = -1;

-out:

-	if (!error) {

-		VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);

-		if (fromnd.ni_dvp != tdvp)

-			VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		if (tvp)

-			VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);

-		error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,

-				   tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);

-	} else {

-		VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);

-		if (tdvp == tvp)

-			vrele(tdvp);

-		else

-			vput(tdvp);

-		if (tvp)

-			vput(tvp);

-		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

-		vrele(fromnd.ni_dvp);

-		vrele(fvp);

-	}

-	vrele(tond.ni_startdir);

-	FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);

-out1:

-	if (fromnd.ni_startdir)

-		vrele(fromnd.ni_startdir);

-	FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);

-	if (error == -1)

-		return (0);

-	return (error);

-}

-/*

- * Make a directory file.

- */

-/* ARGSUSED */

-sys_mkdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mkdir_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (vp != NULL) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(vp);

-		return (EEXIST);

-	}

-	VATTR_NULL(&vattr);

-	vattr.va_type = VDIR;

-	vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);

-	if (!error)

-		vput(nd.ni_vp);

-	return (error);

-}

-/*

- * Remove a directory file.

- */

-/* ARGSUSED */

-sys_rmdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_rmdir_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct vnode *vp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (vp->v_type != VDIR) {

-		error = ENOTDIR;

-		goto out;

-	}

-	/*

-	 * No rmdir "." please.

-	 */

-	if (nd.ni_dvp == vp) {

-		error = EINVAL;

-		goto out;

-	}

-	/*

-	 * The root of a mounted filesystem cannot be deleted.

-	 */

-	if (vp->v_flag & VROOT)

-		error = EBUSY;

-out:

-	if (!error) {

-		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-		error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

-	} else {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vput(vp);

-	}

-	return (error);

-}

-/*

- * Read a block of directory entries in a file system independent format.

- */

-sys_getdirentries(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_getdirentries_args /* {

-		syscallarg(int) fd;

-		syscallarg(char *) buf;

-		syscallarg(u_int) count;

-		syscallarg(long *) basep;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct file *fp;

-	struct uio auio;

-	struct iovec aiov;

-	long loff;

-	int error, eofflag;

-	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

-		return (error);

-	if ((fp->f_flag & FREAD) == 0)

-		return (EBADF);

-	vp = (struct vnode *)fp->f_data;

-unionread:

-	if (vp->v_type != VDIR)

-		return (EINVAL);

-	aiov.iov_base = SCARG(uap, buf);

-	aiov.iov_len = SCARG(uap, count);

-	auio.uio_iov = &aiov;

-	auio.uio_iovcnt = 1;

-	auio.uio_rw = UIO_READ;

-	auio.uio_segflg = UIO_USERSPACE;

-	auio.uio_procp = p;

-	auio.uio_resid = SCARG(uap, count);

-	VOP_LOCK(vp);

-	loff = auio.uio_offset = fp->f_offset;

-	error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *)0, 0);

-	fp->f_offset = auio.uio_offset;

-	VOP_UNLOCK(vp);

-	if (error)

-		return (error);

-#ifdef UNION

-{

-	extern int (**union_vnodeop_p)();

-	extern struct vnode *union_dircache __P((struct vnode *));

-	if ((SCARG(uap, count) == auio.uio_resid) &&

-	    (vp->v_op == union_vnodeop_p)) {

-		struct vnode *lvp;

-		lvp = union_dircache(vp);

-		if (lvp != NULLVP) {

-			struct vattr va;

-			/*

-			 * If the directory is opaque,

-			 * then don't show lower entries

-			 */

-			error = VOP_GETATTR(vp, &va, fp->f_cred, p);

-			if (va.va_flags & OPAQUE) {

-				vput(lvp);

-				lvp = NULL;

-			}

-		}

-		if (lvp != NULLVP) {

-			error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);

-			VOP_UNLOCK(lvp);

-			if (error) {

-				vrele(lvp);

-				return (error);

-			}

-			fp->f_data = (caddr_t) lvp;

-			fp->f_offset = 0;

-			error = vn_close(vp, FREAD, fp->f_cred, p);

-			if (error)

-				return (error);

-			vp = lvp;

-			goto unionread;

-		}

-	}

-}

-#endif /* UNION */

-	if ((SCARG(uap, count) == auio.uio_resid) &&

-	    (vp->v_flag & VROOT) &&

-	    (vp->v_mount->mnt_flag & MNT_UNION)) {

-		struct vnode *tvp = vp;

-		vp = vp->v_mount->mnt_vnodecovered;

-		VREF(vp);

-		fp->f_data = (caddr_t) vp;

-		fp->f_offset = 0;

-		vrele(tvp);

-		goto unionread;

-	}

-	error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),

-	    sizeof(long));

-	*retval = SCARG(uap, count) - auio.uio_resid;

-	return (error);

-}

-/*

- * Set the mode mask for creation of filesystem nodes.

- */

-int

-sys_umask(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_umask_args /* {

-		syscallarg(int) newmask;

-	} */ *uap = v;

-	register struct filedesc *fdp;

-	fdp = p->p_fd;

-	*retval = fdp->fd_cmask;

-	fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;

-	return (0);

-}

-/*

- * Void all references to file by ripping underlying filesystem

- * away from vnode.

- */

-/* ARGSUSED */

-sys_revoke(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_revoke_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if (error = namei(&nd))

-		return (error);

-	vp = nd.ni_vp;

-	if (vp->v_type != VCHR && vp->v_type != VBLK) {

-		error = EINVAL;

-		goto out;

-	}

-	if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))

-		goto out;

-	if (p->p_ucred->cr_uid != vattr.va_uid &&

-	    (error = suser(p->p_ucred, &p->p_acflag)))

-		goto out;

-	if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))

-		vgoneall(vp);

-out:

-	vrele(vp);

-	return (error);

-}

-/*

- * Convert a user file descriptor to a kernel file entry.

- */

-getvnode(fdp, fd, fpp)

-	struct filedesc *fdp;

-	struct file **fpp;

-	int fd;

-{

-	struct file *fp;

-	if ((u_int)fd >= fdp->fd_nfiles ||

-	    (fp = fdp->fd_ofiles[fd]) == NULL)

-		return (EBADF);

-	if (fp->f_type != DTYPE_VNODE)

-		return (EINVAL);

-	*fpp = fp;

-	return (0);

-}

--- a/sys/src/cmd/diff/test/diff-t9.2

+++ /dev/null

@@ -1,3216 +1,0 @@

-/*	$OpenBSD: t9.2,v 1.2 2013/12/01 16:40:56 krw Exp $	*/

-/*	$NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $	*/

-/*

- * Copyright (c) 1989, 1993

- *	The Regents of the University of California.  All rights reserved.

- * (c) UNIX System Laboratories, Inc.

- * All or some portions of this file are derived from material licensed

- * to the University of California by American Telephone and Telegraph

- * Co. or Unix System Laboratories, Inc. and are reproduced herein with

- * the permission of UNIX System Laboratories, Inc.

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in the

- *    documentation and/or other materials provided with the distribution.

- * 3. Neither the name of the University nor the names of its contributors

- *    may be used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

- * SUCH DAMAGE.

- *

- *	@(#)vfs_syscalls.c	8.28 (Berkeley) 12/10/94

- */

-#include <sys/param.h>

-#include <sys/systm.h>

-#include <sys/namei.h>

-#include <sys/filedesc.h>

-#include <sys/kernel.h>

-#include <sys/file.h>

-#include <sys/stat.h>

-#include <sys/vnode.h>

-#include <sys/mount.h>

-#include <sys/proc.h>

-#include <sys/uio.h>

-#include <sys/malloc.h>

-#include <sys/dirent.h>

-#include <sys/extattr.h>

-#include <sys/syscallargs.h>

-#include <uvm/uvm_extern.h>

-#include <sys/sysctl.h>

-extern int suid_clear;

-int	usermount = 0;		/* sysctl: by default, users may not mount */

-static int change_dir(struct nameidata *, struct proc *);

-void checkdirs(struct vnode *);

-/*

- * Redirection info so we don't have to include the union fs routines in

- * the kernel directly.  This way, we can build unionfs as an LKM.  The

- * pointer gets filled in later, when we modload the LKM, or when the

- * compiled-in unionfs code gets initialized.  For now, we just set

- * it to a stub routine.

- */

-int (*union_check_p)(struct proc *, struct vnode **,

-    struct file *, struct uio, int *) = NULL;

-/*

- * Virtual File System System Calls

- */

-/*

- * Mount a file system.

- */

-/* ARGSUSED */

-int

-sys_mount(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mount_args /* {

-		syscallarg(char *) type;

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-		syscallarg(void *) data;

-	} */ *uap = v;

-	register struct vnode *vp;

-	register struct mount *mp;

-	int error, flag = 0;

-#ifdef COMPAT_43

-	u_long fstypenum = 0;

-#endif

-	char fstypename[MFSNAMELEN];

-	char fspath[MNAMELEN];

-	struct vattr va;

-	struct nameidata nd;

-	struct vfsconf *vfsp;

-	struct timeval tv;

-	if (usermount == 0 && (error = suser(p->p_ucred, &p->p_acflag)))

-		return (error);

-	/*

-	 * Mount points must fit in MNAMELEN, not MAXPATHLEN.

-	 */

-	error = copyinstr(SCARG(uap, path), fspath, MNAMELEN, NULL);

-	if (error)

-		return(error);

-	/*

-	 * Get vnode to be covered

-	 */

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspath, p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	if (SCARG(uap, flags) & MNT_UPDATE) {

-		if ((vp->v_flag & VROOT) == 0) {

-			vput(vp);

-			return (EINVAL);

-		}

-		mp = vp->v_mount;

-		flag = mp->mnt_flag;

-		/*

-		 * We only allow the filesystem to be reloaded if it

-		 * is currently mounted read-only.

-		 */

-		if ((SCARG(uap, flags) & MNT_RELOAD) &&

-		    ((mp->mnt_flag & MNT_RDONLY) == 0)) {

-			vput(vp);

-			return (EOPNOTSUPP);	/* Needs translation */

-		}

-		mp->mnt_flag |=

-		    SCARG(uap, flags) & (MNT_RELOAD | MNT_UPDATE);

-		/*

-		 * Only root, or the user that did the original mount is

-		 * permitted to update it.

-		 */

-		if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&

-		    (error = suser(p->p_ucred, &p->p_acflag))) {

-			vput(vp);

-			return (error);

-		}

-		/*

-		 * Do not allow NFS export by non-root users. Silently

-		 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

-		 */

-		if (p->p_ucred->cr_uid != 0) {

-			if (SCARG(uap, flags) & MNT_EXPORTED) {

-				vput(vp);

-				return (EPERM);

-			}

-			SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

-		}

-		if ((error = vfs_busy(mp, LK_NOWAIT, 0, p)) != 0) {

-			vput(vp);

-			return (error);

-		}

-		VOP_UNLOCK(vp, 0, p);

-		goto update;

-	}

-	/*

-	 * If the user is not root, ensure that they own the directory

-	 * onto which we are attempting to mount.

-	 */

-	if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||

-	    (va.va_uid != p->p_ucred->cr_uid &&

-	    (error = suser(p->p_ucred, &p->p_acflag)))) {

-		vput(vp);

-		return (error);

-	}

-	/*

-	 * Do not allow NFS export by non-root users. Silently

-	 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

-	 */

-	if (p->p_ucred->cr_uid != 0) {

-		if (SCARG(uap, flags) & MNT_EXPORTED) {

-			vput(vp);

-			return (EPERM);

-		}

-		SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

-	}

-	if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)

-		return (error);

-	if (vp->v_type != VDIR) {

-		vput(vp);

-		return (ENOTDIR);

-	}

-	error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL);

-	if (error) {

-#ifdef COMPAT_43

-		/*

-		 * Historically filesystem types were identified by number.

-		 * If we get an integer for the filesystem type instead of a

-		 * string, we check to see if it matches one of the historic

-		 * filesystem types.

-		 */

-		fstypenum = (u_long)SCARG(uap, type);

-		for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)

-			if (vfsp->vfc_typenum == fstypenum)

-				break;

-		if (vfsp == NULL) {

-			vput(vp);

-			return (ENODEV);

-		}

-		strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);

-#else

-		vput(vp);

-		return (error);

-#endif

-	}

-	for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) {

-		if (!strcmp(vfsp->vfc_name, fstypename))

-			break;

-	}

-	if (vfsp == NULL) {

-		vput(vp);

-		return (EOPNOTSUPP);

-	}

-	if (vp->v_mountedhere != NULL) {

-		vput(vp);

-		return (EBUSY);

-	}

-	/*

-	 * Allocate and initialize the file system.

-	 */

-	mp = (struct mount *)malloc((u_long)sizeof(struct mount),

-		M_MOUNT, M_WAITOK);

-	bzero((char *)mp, (u_long)sizeof(struct mount));

-	lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);

-	/* This error never happens, but it makes auditing easier */

-	if ((error = vfs_busy(mp, LK_NOWAIT, 0, p)))

-		return (error);

-	mp->mnt_op = vfsp->vfc_vfsops;

-	mp->mnt_vfc = vfsp;

-	mp->mnt_flag |= (vfsp->vfc_flags & MNT_VISFLAGMASK);

-	strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);

-	mp->mnt_vnodecovered = vp;

-	mp->mnt_stat.f_owner = p->p_ucred->cr_uid;

-update:

-	/*

-	 * Set the mount level flags.

-	 */

-	if (SCARG(uap, flags) & MNT_RDONLY)

-		mp->mnt_flag |= MNT_RDONLY;

-	else if (mp->mnt_flag & MNT_RDONLY)

-		mp->mnt_flag |= MNT_WANTRDWR;

-	mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |

-	    MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_SOFTDEP |

-	    MNT_NOATIME | MNT_FORCE);

-	mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |

-	    MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC |

-	    MNT_SOFTDEP | MNT_NOATIME | MNT_FORCE);

-	/*

-	 * Mount the filesystem.

-	 */

-	error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);

-	if (!error) {

-		microtime(&tv);

-		mp->mnt_stat.f_ctime = tv.tv_sec;

-	}

-	if (mp->mnt_flag & MNT_UPDATE) {

-		vrele(vp);

-		if (mp->mnt_flag & MNT_WANTRDWR)

-			mp->mnt_flag &= ~MNT_RDONLY;

-		mp->mnt_flag &=~

-		    (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);

-		if (error)

-			mp->mnt_flag = flag;

- 		if ((mp->mnt_flag & MNT_RDONLY) == 0) {

- 			if (mp->mnt_syncer == NULL)

- 				error = vfs_allocate_syncvnode(mp);

- 		} else {

- 			if (mp->mnt_syncer != NULL)

- 				vgone(mp->mnt_syncer);

- 			mp->mnt_syncer = NULL;

- 		}

-		vfs_unbusy(mp, p);

-		return (error);

-	}

-	vp->v_mountedhere = mp;

-	/*

-	 * Put the new filesystem on the mount list after root.

-	 */

-	cache_purge(vp);

-	if (!error) {

-		vfsp->vfc_refcount++;

-		simple_lock(&mountlist_slock);

-		TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);

-		simple_unlock(&mountlist_slock);

-		checkdirs(vp);

-		VOP_UNLOCK(vp, 0, p);

- 		if ((mp->mnt_flag & MNT_RDONLY) == 0)

- 			error = vfs_allocate_syncvnode(mp);

-		vfs_unbusy(mp, p);

-		(void) VFS_STATFS(mp, &mp->mnt_stat, p);

-		if ((error = VFS_START(mp, 0, p)) != 0)

-			vrele(vp);

-	} else {

-		mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;

-		vfs_unbusy(mp, p);

-		free((caddr_t)mp, M_MOUNT);

-		vput(vp);

-	}

-	return (error);

-}

-/*

- * Scan all active processes to see if any of them have a current

- * or root directory onto which the new filesystem has just been

- * mounted. If so, replace them with the new mount point.

- */

-void

-checkdirs(olddp)

-	struct vnode *olddp;

-{

-	struct filedesc *fdp;

-	struct vnode *newdp;

-	struct proc *p;

-	if (olddp->v_usecount == 1)

-		return;

-	if (VFS_ROOT(olddp->v_mountedhere, &newdp))

-		panic("mount: lost mount");

-	for (p = LIST_FIRST(&allproc); p != 0; p = LIST_NEXT(p, p_list)) {

-		fdp = p->p_fd;

-		if (fdp->fd_cdir == olddp) {

-			vrele(fdp->fd_cdir);

-			VREF(newdp);

-			fdp->fd_cdir = newdp;

-		}

-		if (fdp->fd_rdir == olddp) {

-			vrele(fdp->fd_rdir);

-			VREF(newdp);

-			fdp->fd_rdir = newdp;

-		}

-	}

-	if (rootvnode == olddp) {

-		vrele(rootvnode);

-		VREF(newdp);

-		rootvnode = newdp;

-	}

-	vput(newdp);

-}

-/*

- * Unmount a file system.

- *

- * Note: unmount takes a path to the vnode mounted on as argument,

- * not special file (as before).

- */

-/* ARGSUSED */

-int

-sys_unmount(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_unmount_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct mount *mp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	mp = vp->v_mount;

-	/*

-	 * Only root, or the user that did the original mount is

-	 * permitted to unmount this filesystem.

-	 */

-	if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&

-	    (error = suser(p->p_ucred, &p->p_acflag))) {

-		vput(vp);

-		return (error);

-	}

-	/*

-	 * Don't allow unmounting the root file system.

-	 */

-	if (mp->mnt_flag & MNT_ROOTFS) {

-		vput(vp);

-		return (EINVAL);

-	}

-	/*

-	 * Must be the root of the filesystem

-	 */

-	if ((vp->v_flag & VROOT) == 0) {

-		vput(vp);

-		return (EINVAL);

-	}

-	vput(vp);

-	if (vfs_busy(mp, LK_EXCLUSIVE, NULL, p))

-		return (EBUSY);

-	return (dounmount(mp, SCARG(uap, flags), p, vp));

-}

-/*

- * Do the actual file system unmount.

- */

-int

-dounmount(struct mount *mp, int flags, struct proc *p, struct vnode *olddp)

-{

-	struct vnode *coveredvp;

-	struct proc *p2;

-	int error;

-	int hadsyncer = 0;

- 	mp->mnt_flag &=~ MNT_ASYNC;

- 	cache_purgevfs(mp);	/* remove cache entries for this file sys */

- 	if (mp->mnt_syncer != NULL) {

-		hadsyncer = 1;

- 		vgone(mp->mnt_syncer);

-		mp->mnt_syncer = NULL;

-	}

-	if (((mp->mnt_flag & MNT_RDONLY) ||

-	    (error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0) ||

- 	    (flags & MNT_FORCE))

- 		error = VFS_UNMOUNT(mp, flags, p);

-	simple_lock(&mountlist_slock);

- 	if (error) {

- 		if ((mp->mnt_flag & MNT_RDONLY) == 0 && hadsyncer)

- 			(void) vfs_allocate_syncvnode(mp);

-		lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK,

-		    &mountlist_slock, p);

-		return (error);

-	}

-	TAILQ_REMOVE(&mountlist, mp, mnt_list);

-	if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {

-		if (olddp) {

-			/*

-			 * Try to put processes back in a real directory

-			 * after a forced unmount.

-			 * XXX We're not holding a ref on olddp, which may

-			 * change, so compare id numbers.

-			 */

-			LIST_FOREACH(p2, &allproc, p_list) {

-				struct filedesc *fdp = p2->p_fd;

-				if (fdp->fd_cdir &&

-				    fdp->fd_cdir->v_id == olddp->v_id) {

-					vrele(fdp->fd_cdir);

-					vref(coveredvp);

-					fdp->fd_cdir = coveredvp;

-				}

-				if (fdp->fd_rdir &&

-				    fdp->fd_rdir->v_id == olddp->v_id) {

-					vrele(fdp->fd_rdir);

-					vref(coveredvp);

-					fdp->fd_rdir = coveredvp;

-				}

-			}

-		}

-		coveredvp->v_mountedhere = NULL;

- 		vrele(coveredvp);

- 	}

-	mp->mnt_vfc->vfc_refcount--;

-	if (mp->mnt_vnodelist.lh_first != NULL)

-		panic("unmount: dangling vnode");

-	lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock, p);

-	free((caddr_t)mp, M_MOUNT);

-	return (0);

-}

-/*

- * Sync each mounted filesystem.

- */

-#ifdef DEBUG

-int syncprt = 0;

-struct ctldebug debug0 = { "syncprt", &syncprt };

-#endif

-/* ARGSUSED */

-int

-sys_sync(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct mount *mp, *nmp;

-	int asyncflag;

-	simple_lock(&mountlist_slock);

-	TAILQ_FOREACH_REVERSE_SAFE(mp, &mountlist, mnt_list, nmp) {

-		if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p))

-			continue;

-		if ((mp->mnt_flag & MNT_RDONLY) == 0) {

-			asyncflag = mp->mnt_flag & MNT_ASYNC;

-			mp->mnt_flag &= ~MNT_ASYNC;

-			uvm_vnp_sync(mp);

-			VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);

-			if (asyncflag)

-				mp->mnt_flag |= MNT_ASYNC;

-		}

-		simple_lock(&mountlist_slock);

-		vfs_unbusy(mp, p);

-	}

-	simple_unlock(&mountlist_slock);

-#ifdef DEBUG

-	if (syncprt)

-		vfs_bufstats();

-#endif /* DEBUG */

-	return (0);

-}

-/*

- * Change filesystem quotas.

- */

-/* ARGSUSED */

-int

-sys_quotactl(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_quotactl_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) cmd;

-		syscallarg(int) uid;

-		syscallarg(caddr_t) arg;

-	} */ *uap = v;

-	register struct mount *mp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	mp = nd.ni_vp->v_mount;

-	vrele(nd.ni_vp);

-	return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),

-	    SCARG(uap, arg), p));

-}

-/*

- * Get filesystem statistics.

- */

-/* ARGSUSED */

-int

-sys_statfs(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_statfs_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct statfs *) buf;

-	} */ *uap = v;

-	register struct mount *mp;

-	register struct statfs *sp;

-	int error;

-	struct nameidata nd;

-	struct statfs sb;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	mp = nd.ni_vp->v_mount;

-	sp = &mp->mnt_stat;

-	vrele(nd.ni_vp);

-	if ((error = VFS_STATFS(mp, sp, p)) != 0)

-		return (error);

-	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-#if notyet

-	if (mp->mnt_flag & MNT_SOFTDEP)

-		sp->f_eflags = STATFS_SOFTUPD;

-#endif

-	/* Don't let non-root see filesystem id (for NFS security) */

-	if (suser(p->p_ucred, &p->p_acflag)) {

-		bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));

-		sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;

-		sp = &sb;

-	}

-	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

-}

-/*

- * Get filesystem statistics.

- */

-/* ARGSUSED */

-int

-sys_fstatfs(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fstatfs_args /* {

-		syscallarg(int) fd;

-		syscallarg(struct statfs *) buf;

-	} */ *uap = v;

-	struct file *fp;

-	struct mount *mp;

-	struct statfs *sp;

-	int error;

-	struct statfs sb;

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	mp = ((struct vnode *)fp->f_data)->v_mount;

-	sp = &mp->mnt_stat;

-	error = VFS_STATFS(mp, sp, p);

-	FRELE(fp);

-	if (error)

-		return (error);

-	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-#if notyet

-	if (mp->mnt_flag & MNT_SOFTDEP)

-		sp->f_eflags = STATFS_SOFTUPD;

-#endif

-	/* Don't let non-root see filesystem id (for NFS security) */

-	if (suser(p->p_ucred, &p->p_acflag)) {

-		bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));

-		sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;

-		sp = &sb;

-	}

-	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

-}

-/*

- * Get statistics on all filesystems.

- */

-int

-sys_getfsstat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_getfsstat_args /* {

-		syscallarg(struct statfs *) buf;

-		syscallarg(size_t) bufsize;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct mount *mp *nmp;

-	register struct statfs *sp;

-	struct statfs sb;

-	caddr_t sfsp;

-	size_t count, maxcount;

-	int error, flags = SCARG(uap, flags);

-	maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);

-	sfsp = (caddr_t)SCARG(uap, buf);

-	count = 0;

-	simple_lock(&mountlist_slock);

-	TAILQ_FOREACH_REVERSE_SAFE(mp, &mountlist, mnt_list, nmp) {

-		if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p))

-			continue;

-		if (sfsp && count < maxcount) {

-			sp = &mp->mnt_stat;

-			/* Refresh stats unless MNT_NOWAIT is specified */

-			if (flags != MNT_NOWAIT &&

-			    flags != MNT_LAZY &&

-			    (flags == MNT_WAIT ||

-			    flags == 0) &&

-			    (error = VFS_STATFS(mp, sp, p))) {

-				simple_lock(&mountlist_slock);

-				vfs_unbusy(mp, p);

- 				continue;

-			}

-			sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-#if notyet

-			if (mp->mnt_flag & MNT_SOFTDEP)

-				sp->f_eflags = STATFS_SOFTUPD;

-#endif

-			if (suser(p->p_ucred, &p->p_acflag)) {

-				bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));

-				sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;

-				sp = &sb;

-			}

-			error = copyout((caddr_t)sp, sfsp, sizeof(*sp));

-			if (error) {

-				vfs_unbusy(mp, p);

-				return (error);

-			}

-			sfsp += sizeof(*sp);

-		}

-		count++;

-		simple_lock(&mountlist_slock);

-		vfs_unbusy(mp, p);

-	}

-	simple_unlock(&mountlist_slock);

-	if (sfsp && count > maxcount)

-		*retval = maxcount;

-	else

-		*retval = count;

-	return (0);

-}

-/*

- * Change current working directory to a given file descriptor.

- */

-/* ARGSUSED */

-int

-sys_fchdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fchdir_args /* {

-		syscallarg(int) fd;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct vnode *vp, *tdp;

-	struct mount *mp;

-	struct file *fp;

-	int error;

-	if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VREF(vp);

-	FRELE(fp);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_type != VDIR)

-		error = ENOTDIR;

-	else

-		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

-	while (!error && (mp = vp->v_mountedhere) != NULL) {

-		if (vfs_busy(mp, 0, 0, p))

-			continue;

-		error = VFS_ROOT(mp, &tdp);

-		vfs_unbusy(mp, p);

-		if (error)

-			break;

-		vput(vp);

-		vp = tdp;

-	}

-	if (error) {

-		vput(vp);

-		return (error);

-	}

-	VOP_UNLOCK(vp, 0, p);

-	vrele(fdp->fd_cdir);

-	fdp->fd_cdir = vp;

-	return (0);

-}

-/*

- * Change current working directory (``.'').

- */

-/* ARGSUSED */

-int

-sys_chdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_chdir_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct filedesc *fdp = p->p_fd;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = change_dir(&nd, p)) != 0)

-		return (error);

-	vrele(fdp->fd_cdir);

-	fdp->fd_cdir = nd.ni_vp;

-	return (0);

-}

-/*

- * Change notion of root (``/'') directory.

- */

-/* ARGSUSED */

-int

-sys_chroot(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_chroot_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct filedesc *fdp = p->p_fd;

-	int error;

-	struct nameidata nd;

-	if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)

-		return (error);

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = change_dir(&nd, p)) != 0)

-		return (error);

-	if (fdp->fd_rdir != NULL) {

-		/*

-		 * A chroot() done inside a changed root environment does

-		 * an automatic chdir to avoid the out-of-tree experience.

-		 */

-		vrele(fdp->fd_rdir);

-		vrele(fdp->fd_cdir);

-		VREF(nd.ni_vp);

-		fdp->fd_cdir = nd.ni_vp;

-	}

-	fdp->fd_rdir = nd.ni_vp;

-	return (0);

-}

-/*

- * Common routine for chroot and chdir.

- */

-static int

-change_dir(ndp, p)

-	register struct nameidata *ndp;

-	struct proc *p;

-{

-	struct vnode *vp;

-	int error;

-	if ((error = namei(ndp)) != 0)

-		return (error);

-	vp = ndp->ni_vp;

-	if (vp->v_type != VDIR)

-		error = ENOTDIR;

-	else

-		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

-	if (error)

-		vput(vp);

-	else

-		VOP_UNLOCK(vp, 0, p);

-	return (error);

-}

-/*

- * Check permissions, allocate an open file structure,

- * and call the device open routine if any.

- */

-int

-sys_open(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_open_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct file *fp;

-	struct vnode *vp;

-	struct vattr vattr;

-	int flags, cmode;

-	int type, indx, error, localtrunc = 0;

-	struct flock lf;

-	struct nameidata nd;

-	if ((error = falloc(p, &fp, &indx)) != 0)

-		return (error);

-	flags = FFLAGS(SCARG(uap, flags));

-	cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	p->p_dupfd = -indx - 1;			/* XXX check for fdopen */

-	if ((flags & O_TRUNC) && (flags & (O_EXLOCK | O_SHLOCK))) {

-		localtrunc = 1;

-		flags &= ~O_TRUNC;	/* Must do truncate ourselves */

-	}

-	if ((error = vn_open(&nd, flags, cmode)) != 0) {

-		if ((error == ENODEV || error == ENXIO) &&

-		    p->p_dupfd >= 0 &&			/* XXX from fdopen */

-		    (error =

-			dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {

-			closef(fp, p);

-			*retval = indx;

-			return (0);

-		}

-		if (error == ERESTART)

-			error = EINTR;

-		fdremove(fdp, indx);

-		closef(fp, p);

-		return (error);

-	}

-	p->p_dupfd = 0;

-	vp = nd.ni_vp;

-	fp->f_flag = flags & FMASK;

-	fp->f_type = DTYPE_VNODE;

-	fp->f_ops = &vnops;

-	fp->f_data = (caddr_t)vp;

-	if (flags & (O_EXLOCK | O_SHLOCK)) {

-		lf.l_whence = SEEK_SET;

-		lf.l_start = 0;

-		lf.l_len = 0;

-		if (flags & O_EXLOCK)

-			lf.l_type = F_WRLCK;

-		else

-			lf.l_type = F_RDLCK;

-		type = F_FLOCK;

-		if ((flags & FNONBLOCK) == 0)

-			type |= F_WAIT;

-		VOP_UNLOCK(vp, 0, p);

-		error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);

-		if (error) {

-			/* closef will vn_close the file for us. */

-			fdremove(fdp, indx);

-			closef(fp, p);

-			return (error);

-		}

-		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-		fp->f_flag |= FHASLOCK;

-	}

-	if (localtrunc) {

-		VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-		if ((fp->f_flag & FWRITE) == 0)

-			error = EACCES;

-		else if (vp->v_mount->mnt_flag & MNT_RDONLY)

-			error = EROFS;

-		else if (vp->v_type == VDIR)

-			error = EISDIR;

-		else if ((error = vn_writechk(vp)) == 0) {

-			VATTR_NULL(&vattr);

-			vattr.va_size = 0;

-			error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);

-		}

-		if (error) {

-			VOP_UNLOCK(vp, 0, p);

-			/* closef will close the file for us. */

-			fdremove(fdp, indx);

-			closef(fp, p);

-			return (error);

-		}

-	}

-	VOP_UNLOCK(vp, 0, p);

-	*retval = indx;

-	FILE_SET_MATURE(fp);

-	return (0);

-}

-/*

- * Get file handle system call

- */

-int

-sys_getfh(p, v, retval)

-	struct proc *p;

-	register void *v;

-	register_t *retval;

-{

-	register struct sys_getfh_args /* {

-		syscallarg(char *) fname;

-		syscallarg(fhandle_t *) fhp;

-	} */ *uap = v;

-	register struct vnode *vp;

-	fhandle_t fh;

-	int error;

-	struct nameidata nd;

-	/*

-	 * Must be super user

-	 */

-	error = suser(p->p_ucred, &p->p_acflag);

-	if (error)

-		return (error);

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, fname), p);

-	error = namei(&nd);

-	if (error)

-		return (error);

-	vp = nd.ni_vp;

-	bzero((caddr_t)&fh, sizeof(fh));

-	fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;

-	error = VFS_VPTOFH(vp, &fh.fh_fid);

-	vput(vp);

-	if (error)

-		return (error);

-	error = copyout((caddr_t)&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh));

-	return (error);

-}

-/*

- * Open a file given a file handle.

- *

- * Check permissions, allocate an open file structure,

- * and call the device open routine if any.

- */

-int

-sys_fhopen(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fhopen_args /* {

-		syscallarg(const fhandle_t *) fhp;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct file *fp;

-	struct vnode *vp = NULL;

-	struct mount *mp;

-	struct ucred *cred = p->p_ucred;

-	int flags;

-	int type, indx, error=0;

-	struct flock lf;

-	struct vattr va;

-	fhandle_t fh;

-	/*

-	 * Must be super user

-	 */

-	if ((error = suser(p->p_ucred, &p->p_acflag)))

-		return (error);

-	flags = FFLAGS(SCARG(uap, flags));

-	if ((flags & (FREAD | FWRITE)) == 0)

-		return (EINVAL);

-	if ((flags & O_CREAT))

-		return (EINVAL);

-	if ((error = falloc(p, &fp, &indx)) != 0)

-		return (error);

-	if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)

-		goto bad;

-	if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {

-		error = ESTALE;

-		goto bad;

-	}

-	if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) {

-		vp = NULL;	/* most likely unnecessary sanity for bad: */

-		goto bad;

-	}

-	/* Now do an effective vn_open */

-	if (vp->v_type == VSOCK) {

-		error = EOPNOTSUPP;

-		goto bad;

-	}

-	if (flags & FREAD) {

-		if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0)

-			goto bad;

-	}

-	if (flags & (FWRITE | O_TRUNC)) {

-		if (vp->v_type == VDIR) {

-			error = EISDIR;

-			goto bad;

-		}

-		if ((error = vn_writechk(vp)) != 0 ||

-		    (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0)

-			goto bad;

-	}

-	if (flags & O_TRUNC) {

-		VOP_UNLOCK(vp, 0, p);				/* XXX */

-		VOP_LEASE(vp, p, cred, LEASE_WRITE);

-		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);	/* XXX */

-		VATTR_NULL(&va);

-		va.va_size = 0;

-		if ((error = VOP_SETATTR(vp, &va, cred, p)) != 0)

-			goto bad;

-	}

-	if ((error = VOP_OPEN(vp, flags, cred, p)) != 0)

-		goto bad;

-	if (flags & FWRITE)

-		vp->v_writecount++;

-	/* done with modified vn_open, now finish what sys_open does. */

-	fp->f_flag = flags & FMASK;

-	fp->f_type = DTYPE_VNODE;

-	fp->f_ops = &vnops;

-	fp->f_data = (caddr_t)vp;

-	if (flags & (O_EXLOCK | O_SHLOCK)) {

-		lf.l_whence = SEEK_SET;

-		lf.l_start = 0;

-		lf.l_len = 0;

-		if (flags & O_EXLOCK)

-			lf.l_type = F_WRLCK;

-		else

-			lf.l_type = F_RDLCK;

-		type = F_FLOCK;

-		if ((flags & FNONBLOCK) == 0)

-			type |= F_WAIT;

-		VOP_UNLOCK(vp, 0, p);

-		error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);

-		if (error) {

-			/* closef will vn_close the file for us. */

-			fdremove(fdp, indx);

-			closef(fp, p);

-			return (error);

-		}

-		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-		fp->f_flag |= FHASLOCK;

-	}

-	VOP_UNLOCK(vp, 0, p);

-	*retval = indx;

-	FILE_SET_MATURE(fp);

-	return (0);

-bad:

-	fdremove(fdp, indx);

-	closef(fp, p);

-	if (vp != NULL)

-		vput(vp);

-	return (error);

-}

-/* ARGSUSED */

-int

-sys_fhstat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fhstat_args /* {

-		syscallarg(const fhandle_t *) fhp;

-		syscallarg(struct stat *) sb;

-	} */ *uap = v;

-	struct stat sb;

-	int error;

-	fhandle_t fh;

-	struct mount *mp;

-	struct vnode *vp;

-	/*

-	 * Must be super user

-	 */

-	if ((error = suser(p->p_ucred, &p->p_acflag)))

-		return (error);

-	if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)

-		return (error);

-	if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)

-		return (ESTALE);

-	if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))

-		return (error);

-	error = vn_stat(vp, &sb, p);

-	vput(vp);

-	if (error)

-		return (error);

-	error = copyout(&sb, SCARG(uap, sb), sizeof(sb));

-	return (error);

-}

-/* ARGSUSED */

-int

-sys_fhstatfs(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_fhstatfs_args /*

-		syscallarg(const fhandle_t *) fhp;

-		syscallarg(struct statfs *) buf;

-	} */ *uap = v;

-	struct statfs sp;

-	fhandle_t fh;

-	struct mount *mp;

-	struct vnode *vp;

-	int error;

-	/*

-	 * Must be super user

-	 */

-	if ((error = suser(p->p_ucred, &p->p_acflag)))

-		return (error);

-	if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)

-		return (error);

-	if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)

-		return (ESTALE);

-	if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))

-		return (error);

-	mp = vp->v_mount;

-	vput(vp);

-	if ((error = VFS_STATFS(mp, &sp, p)) != 0)

-		return (error);

-	sp.f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

-	return (copyout(&sp, SCARG(uap, buf), sizeof(sp)));

-}

-/*

- * Create a special file.

- */

-/* ARGSUSED */

-int

-sys_mknod(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mknod_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-		syscallarg(int) dev;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	int whiteout = 0;

-	struct nameidata nd;

-	if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)

-		return (error);

-	if (p->p_fd->fd_rdir)

-		return (EINVAL);

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	if (vp != NULL)

-		error = EEXIST;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

-		vattr.va_rdev = SCARG(uap, dev);

-		whiteout = 0;

-		switch (SCARG(uap, mode) & S_IFMT) {

-		case S_IFMT:	/* used by badsect to flag bad sectors */

-			vattr.va_type = VBAD;

-			break;

-		case S_IFCHR:

-			vattr.va_type = VCHR;

-			break;

-		case S_IFBLK:

-			vattr.va_type = VBLK;

-			break;

-		case S_IFWHT:

-			whiteout = 1;

-			break;

-		default:

-			error = EINVAL;

-			break;

-		}

-	}

-	if (!error) {

-		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		if (whiteout) {

-			error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);

-			if (error)

-				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-			vput(nd.ni_dvp);

-		} else {

-			error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,

-						&nd.ni_cnd, &vattr);

-		}

-	} else {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		if (vp)

-			vrele(vp);

-	}

-	return (error);

-}

-/*

- * Create a named pipe.

- */

-/* ARGSUSED */

-int

-sys_mkfifo(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-#ifndef FIFO

-	return (EOPNOTSUPP);

-#else

-	register struct sys_mkfifo_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	if (nd.ni_vp != NULL) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(nd.ni_vp);

-		return (EEXIST);

-	}

-	VATTR_NULL(&vattr);

-	vattr.va_type = VFIFO;

-	vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));

-#endif /* FIFO */

-}

-/*

- * Make a hard file link.

- */

-/* ARGSUSED */

-int

-sys_link(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_link_args /* {

-		syscallarg(char *) path;

-		syscallarg(char *) link;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct nameidata nd;

-	int error;

-	int flags;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	flags = LOCKPARENT;

-	if (vp->v_type == VDIR) {

-		flags |= STRIPSLASHES;

-	}

-	NDINIT(&nd, CREATE, flags, UIO_USERSPACE, SCARG(uap, link), p);

-	if ((error = namei(&nd)) != 0)

-		goto out;

-	if (nd.ni_vp) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(nd.ni_vp);

-		error = EEXIST;

-		goto out;

-	}

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);

-out:

-	vrele(vp);

-	return (error);

-}

-/*

- * Make a symbolic link.

- */

-/* ARGSUSED */

-int

-sys_symlink(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_symlink_args /* {

-		syscallarg(char *) path;

-		syscallarg(char *) link;

-	} */ *uap = v;

-	struct vattr vattr;

-	char *path;

-	int error;

-	struct nameidata nd;

-	MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);

-	error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL);

-	if (error)

-		goto out;

-	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);

-	if ((error = namei(&nd)) != 0)

-		goto out;

-	if (nd.ni_vp) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(nd.ni_vp);

-		error = EEXIST;

-		goto out;

-	}

-	VATTR_NULL(&vattr);

-	vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);

-out:

-	FREE(path, M_NAMEI);

-	return (error);

-}

-/*

- * Delete a whiteout from the filesystem.

- */

-/* ARGSUSED */

-int

-sys_undelete(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_undelete_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	error = namei(&nd);

-	if (error)

-		return (error);

-	if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == nd.ni_vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		if (nd.ni_vp)

-			vrele(nd.ni_vp);

-		return (EEXIST);

-	}

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0)

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-	vput(nd.ni_dvp);

-	return (error);

-}

-/*

- * Delete a name from the filesystem.

- */

-/* ARGSUSED */

-int

-sys_unlink(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_unlink_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct vnode *vp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	/*

-	 * The root of a mounted filesystem cannot be deleted.

-	 */

-	if (vp->v_flag & VROOT) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vput(vp);

-		error = EBUSY;

-		goto out;

-	}

-	(void)uvm_vnp_uncache(vp);

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

-out:

-	return (error);

-}

-/*

- * Reposition read/write file offset.

- */

-int

-sys_lseek(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_lseek_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) pad;

-		syscallarg(off_t) offset;

-		syscallarg(int) whence;

-	} */ *uap = v;

-	struct ucred *cred = p->p_ucred;

-	register struct filedesc *fdp = p->p_fd;

-	register struct file *fp;

-	struct vattr vattr;

-	struct vnode *vp;

-	int error, special;

-	if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)

-		return (EBADF);

-	if (fp->f_type != DTYPE_VNODE)

-		return (ESPIPE);

-	vp = (struct vnode *)fp->f_data;

-	if (vp->v_type == VFIFO)

-		return (ESPIPE);

-	if (vp->v_type == VCHR)

-		special = 1;

-	else

-		special = 0;

-	switch (SCARG(uap, whence)) {

-	case SEEK_CUR:

-		if (!special && fp->f_offset + SCARG(uap, offset) < 0)

-			return (EINVAL);

-		fp->f_offset += SCARG(uap, offset);

-		break;

-	case SEEK_END:

-		error = VOP_GETATTR((struct vnode *)fp->f_data, &vattr,

-				    cred, p);

-		if (error)

-			return (error);

-		if (!special && (off_t)vattr.va_size + SCARG(uap, offset) < 0)

-			return (EINVAL);

-		fp->f_offset = SCARG(uap, offset) + vattr.va_size;

-		break;

-	case SEEK_SET:

-		if (!special && SCARG(uap, offset) < 0)

-			return (EINVAL);

-		fp->f_offset = SCARG(uap, offset);

-		break;

-	default:

-		return (EINVAL);

-	}

-	*(off_t *)retval = fp->f_offset;

-	return (0);

-}

-/*

- * Check access permissions.

- */

-int

-sys_access(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_access_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) flags;

-	} */ *uap = v;

-	register struct ucred *cred = p->p_ucred;

-	register struct vnode *vp;

-	int error, flags, t_gid, t_uid;

-	struct nameidata nd;

-	if (SCARG(uap, flags) & ~(R_OK | W_OK | X_OK))

-		return (EINVAL);

-	t_uid = cred->cr_uid;

-	t_gid = cred->cr_gid;

-	cred->cr_uid = p->p_cred->p_ruid;

-	cred->cr_gid = p->p_cred->p_rgid;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		goto out1;

-	vp = nd.ni_vp;

-	/* Flags == 0 means only check for existence. */

-	if (SCARG(uap, flags)) {

-		flags = 0;

-		if (SCARG(uap, flags) & R_OK)

-			flags |= VREAD;

-		if (SCARG(uap, flags) & W_OK)

-			flags |= VWRITE;

-		if (SCARG(uap, flags) & X_OK)

-			flags |= VEXEC;

-		if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)

-			error = VOP_ACCESS(vp, flags, cred, p);

-	}

-	vput(vp);

-out1:

-	cred->cr_uid = t_uid;

-	cred->cr_gid = t_gid;

-	return (error);

-}

-/*

- * Get file status; this version follows links.

- */

-/* ARGSUSED */

-int

-sys_stat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_stat_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct stat *) ub;

-	} */ *uap = v;

-	struct stat sb;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	error = vn_stat(nd.ni_vp, &sb, p);

-	vput(nd.ni_vp);

-	if (error)

-		return (error);

-	/* Don't let non-root see generation numbers (for NFS security) */

-	if (suser(p->p_ucred, &p->p_acflag))

-		sb.st_gen = 0;

-	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

-	return (error);

-}

-/*

- * Get file status; this version does not follow links.

- */

-/* ARGSUSED */

-int

-sys_lstat(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_lstat_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct stat *) ub;

-	} */ *uap = v;

-	struct stat sb;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	error = vn_stat(nd.ni_vp, &sb, p);

-	vput(nd.ni_vp);

-	if (error)

-		return (error);

-	/* Don't let non-root see generation numbers (for NFS security) */

-	if (suser(p->p_ucred, &p->p_acflag))

-		sb.st_gen = 0;

-	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

-	return (error);

-}

-/*

- * Get configurable pathname variables.

- */

-/* ARGSUSED */

-int

-sys_pathconf(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_pathconf_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) name;

-	} */ *uap = v;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);

-	vput(nd.ni_vp);

-	return (error);

-}

-/*

- * Return target name of a symbolic link.

- */

-/* ARGSUSED */

-int

-sys_readlink(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_readlink_args /* {

-		syscallarg(char *) path;

-		syscallarg(char *) buf;

-		syscallarg(size_t) count;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct iovec aiov;

-	struct uio auio;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	if (vp->v_type != VLNK)

-		error = EINVAL;

-	else {

-		aiov.iov_base = SCARG(uap, buf);

-		aiov.iov_len = SCARG(uap, count);

-		auio.uio_iov = &aiov;

-		auio.uio_iovcnt = 1;

-		auio.uio_offset = 0;

-		auio.uio_rw = UIO_READ;

-		auio.uio_segflg = UIO_USERSPACE;

-		auio.uio_procp = p;

-		auio.uio_resid = SCARG(uap, count);

-		error = VOP_READLINK(vp, &auio, p->p_ucred);

-	}

-	vput(vp);

-	*retval = SCARG(uap, count) - auio.uio_resid;

-	return (error);

-}

-/*

- * Change flags of a file given a path name.

- */

-/* ARGSUSED */

-int

-sys_chflags(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_chflags_args /* {

-		syscallarg(char *) path;

-		syscallarg(unsigned int) flags;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else if (SCARG(uap, flags) == VNOVAL)

-		error = EINVAL;

-	else {

-		if (suser(p->p_ucred, &p->p_acflag)) {

-			if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)

-				goto out;

-			if (vattr.va_type == VCHR || vattr.va_type == VBLK) {

-				error = EINVAL;

-				goto out;

-			}

-		}

-		VATTR_NULL(&vattr);

-		vattr.va_flags = SCARG(uap, flags);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-out:

-	vput(vp);

-	return (error);

-}

-/*

- * Change flags of a file given a file descriptor.

- */

-/* ARGSUSED */

-int

-sys_fchflags(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fchflags_args /* {

-		syscallarg(int) fd;

-		syscallarg(unsigned int) flags;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else if (SCARG(uap, flags) == VNOVAL)

-		error = EINVAL;

-	else {

-		if (suser(p->p_ucred, &p->p_acflag)) {

-			if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))

-			    != 0)

-				goto out;

-			if (vattr.va_type == VCHR || vattr.va_type == VBLK) {

-				error = EINVAL;

-				goto out;

-			}

-		}

-		VATTR_NULL(&vattr);

-		vattr.va_flags = SCARG(uap, flags);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-out:

-	VOP_UNLOCK(vp, 0, p);

-	FRELE(fp);

-	return (error);

-}

-/*

- * Change mode of a file given path name.

- */

-/* ARGSUSED */

-int

-sys_chmod(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_chmod_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	if (SCARG(uap, mode) & ~(S_IFMT | ALLPERMS))

-		return (EINVAL);

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Change mode of a file given a file descriptor.

- */

-/* ARGSUSED */

-int

-sys_fchmod(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fchmod_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if (SCARG(uap, mode) & ~(S_IFMT | ALLPERMS))

-		return (EINVAL);

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		VATTR_NULL(&vattr);

-		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	VOP_UNLOCK(vp, 0, p);

-	FRELE(fp);

-	return (error);

-}

-/*

- * Set ownership given a path name.

- */

-/* ARGSUSED */

-int

-sys_chown(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_chown_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) uid;

-		syscallarg(int) gid;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	u_short mode;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		if ((SCARG(uap, uid) != -1 || SCARG(uap, gid) != -1) &&

-		    (suser(p->p_ucred, &p->p_acflag) || suid_clear)) {

-			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);

-			if (error)

-				goto out;

-			mode = vattr.va_mode & ~(VSUID | VSGID);

-			if (mode == vattr.va_mode)

-				mode = VNOVAL;

-		}

-		else

-			mode = VNOVAL;

-		VATTR_NULL(&vattr);

-		vattr.va_uid = SCARG(uap, uid);

-		vattr.va_gid = SCARG(uap, gid);

-		vattr.va_mode = mode;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-out:

-	vput(vp);

-	return (error);

-}

-/*

- * Set ownership given a path name, without following links.

- */

-/* ARGSUSED */

-int

-sys_lchown(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_lchown_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) uid;

-		syscallarg(int) gid;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	u_short mode;

-	NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		if ((SCARG(uap, uid) != -1 || SCARG(uap, gid) != -1) &&

-		    (suser(p->p_ucred, &p->p_acflag) || suid_clear)) {

-			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);

-			if (error)

-				goto out;

-			mode = vattr.va_mode & ~(VSUID | VSGID);

-			if (mode == vattr.va_mode)

-				mode = VNOVAL;

-		}

-		else

-			mode = VNOVAL;

-		VATTR_NULL(&vattr);

-		vattr.va_uid = SCARG(uap, uid);

-		vattr.va_gid = SCARG(uap, gid);

-		vattr.va_mode = mode;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-out:

-	vput(vp);

-	return (error);

-}

-/*

- * Set ownership given a file descriptor.

- */

-/* ARGSUSED */

-int

-sys_fchown(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fchown_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) uid;

-		syscallarg(int) gid;

-	} */ *uap = v;

-	struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct file *fp;

-	u_short mode;

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		if ((SCARG(uap, uid) != -1 || SCARG(uap, gid) != -1) &&

-		    (suser(p->p_ucred, &p->p_acflag) || suid_clear)) {

-			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);

-			if (error)

-				goto out;

-			mode = vattr.va_mode & ~(VSUID | VSGID);

-			if (mode == vattr.va_mode)

-				mode = VNOVAL;

-		} else

-			mode = VNOVAL;

-		VATTR_NULL(&vattr);

-		vattr.va_uid = SCARG(uap, uid);

-		vattr.va_gid = SCARG(uap, gid);

-		vattr.va_mode = mode;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-out:

-	VOP_UNLOCK(vp, 0, p);

-	FRELE(fp);

-	return (error);

-}

-/*

- * Set the access and modification times given a path name.

- */

-/* ARGSUSED */

-int

-sys_utimes(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_utimes_args /* {

-		syscallarg(char *) path;

-		syscallarg(struct timeval *) tptr;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct timeval tv[2];

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	VATTR_NULL(&vattr);

-	if (SCARG(uap, tptr) == NULL) {

-		microtime(&tv[0]);

-		tv[1] = tv[0];

-		vattr.va_vaflags |= VA_UTIMES_NULL;

-	} else {

-		error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,

-		    sizeof (tv));

-		if (error)

-			return (error);

-		/* XXX workaround timeval matching the VFS constant VNOVAL */

-		if (tv[0].tv_sec == VNOVAL)

-			tv[0].tv_sec = VNOVAL - 1;

-		if (tv[1].tv_sec == VNOVAL)

-			tv[1].tv_sec = VNOVAL - 1;

-	}

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		vattr.va_atime.tv_sec = tv[0].tv_sec;

-		vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;

-		vattr.va_mtime.tv_sec = tv[1].tv_sec;

-		vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Set the access and modification times given a file descriptor.

- */

-/* ARGSUSED */

-int

-sys_futimes(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_futimes_args /* {

-		syscallarg(int) fd;

-		syscallarg(struct timeval *) tptr;

-	} */ *uap = v;

-	struct vnode *vp;

-	struct timeval tv[2];

-	struct vattr vattr;

-	int error;

-	struct file *fp;

-	VATTR_NULL(&vattr);

-	if (SCARG(uap, tptr) == NULL) {

-		microtime(&tv[0]);

-		tv[1] = tv[0];

-		vattr.va_vaflags |= VA_UTIMES_NULL;

-	} else {

-		error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,

-		    sizeof (tv));

-		if (error)

-			return (error);

-		/* XXX workaround timeval matching the VFS constant VNOVAL */

-		if (tv[0].tv_sec == VNOVAL)

-			tv[0].tv_sec = VNOVAL - 1;

-		if (tv[1].tv_sec == VNOVAL)

-			tv[1].tv_sec = VNOVAL - 1;

-	}

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_mount->mnt_flag & MNT_RDONLY)

-		error = EROFS;

-	else {

-		vattr.va_atime.tv_sec = tv[0].tv_sec;

-		vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;

-		vattr.va_mtime.tv_sec = tv[1].tv_sec;

-		vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	VOP_UNLOCK(vp, 0, p);

-	FRELE(fp);

-	return (error);

-}

-/*

- * Truncate a file given its path name.

- */

-/* ARGSUSED */

-int

-sys_truncate(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_truncate_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) pad;

-		syscallarg(off_t) length;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_type == VDIR)

-		error = EISDIR;

-	else if ((error = vn_writechk(vp)) == 0 &&

-	    (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {

-		VATTR_NULL(&vattr);

-		vattr.va_size = SCARG(uap, length);

-		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

-	}

-	vput(vp);

-	return (error);

-}

-/*

- * Truncate a file given a file descriptor.

- */

-/* ARGSUSED */

-int

-sys_ftruncate(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_ftruncate_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) pad;

-		syscallarg(off_t) length;

-	} */ *uap = v;

-	struct vattr vattr;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	if ((fp->f_flag & FWRITE) == 0) {

-		error = EINVAL;

-		goto bad;

-	}

-	vp = (struct vnode *)fp->f_data;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	if (vp->v_type == VDIR)

-		error = EISDIR;

-	else if ((error = vn_writechk(vp)) == 0) {

-		VATTR_NULL(&vattr);

-		vattr.va_size = SCARG(uap, length);

-		error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);

-	}

-	VOP_UNLOCK(vp, 0, p);

-bad:

-	FRELE(fp);

-	return (error);

-}

-/*

- * Sync an open file.

- */

-/* ARGSUSED */

-int

-sys_fsync(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_fsync_args /* {

-		syscallarg(int) fd;

-	} */ *uap = v;

-	struct vnode *vp;

-	struct file *fp;

-	int error;

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	vp = (struct vnode *)fp->f_data;

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);

-#ifdef FFS_SOFTUPDATES

-	if (error == 0 && vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))

-		error = softdep_fsync(vp);

-#endif

-	VOP_UNLOCK(vp, 0, p);

-	FRELE(fp);

-	return (error);

-}

-/*

- * Rename files.  Source and destination must either both be directories,

- * or both not be directories.  If target is a directory, it must be empty.

- */

-/* ARGSUSED */

-int

-sys_rename(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_rename_args /* {

-		syscallarg(char *) from;

-		syscallarg(char *) to;

-	} */ *uap = v;

-	register struct vnode *tvp, *fvp, *tdvp;

-	struct nameidata fromnd, tond;

-	int error;

-	int flags;

-	NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,

-	    SCARG(uap, from), p);

-	if ((error = namei(&fromnd)) != 0)

-		return (error);

-	fvp = fromnd.ni_vp;

-	flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART;

-	/*

-	 * rename("foo/", "bar/");  is  OK

-	 */

-	if (fvp->v_type == VDIR)

-		flags |= STRIPSLASHES;

-	NDINIT(&tond, RENAME, flags,

-	    UIO_USERSPACE, SCARG(uap, to), p);

-	if ((error = namei(&tond)) != 0) {

-		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

-		vrele(fromnd.ni_dvp);

-		vrele(fvp);

-		goto out1;

-	}

-	tdvp = tond.ni_dvp;

-	tvp = tond.ni_vp;

-	if (tvp != NULL) {

-		if (fvp->v_type == VDIR && tvp->v_type != VDIR) {

-			error = ENOTDIR;

-			goto out;

-		} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {

-			error = EISDIR;

-			goto out;

-		}

-	}

-	if (fvp == tdvp)

-		error = EINVAL;

-	/*

-	 * If source is the same as the destination (that is the

-	 * same inode number)

-	 */

-	if (fvp == tvp)

-		error = -1;

-out:

-	if (!error) {

-		VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);

-		if (fromnd.ni_dvp != tdvp)

-			VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		if (tvp) {

-			(void)uvm_vnp_uncache(tvp);

-			VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);

-		}

-		error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,

-				   tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);

-	} else {

-		VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);

-		if (tdvp == tvp)

-			vrele(tdvp);

-		else

-			vput(tdvp);

-		if (tvp)

-			vput(tvp);

-		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

-		vrele(fromnd.ni_dvp);

-		vrele(fvp);

-	}

-	vrele(tond.ni_startdir);

-	FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);

-out1:

-	if (fromnd.ni_startdir)

-		vrele(fromnd.ni_startdir);

-	FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);

-	if (error == -1)

-		return (0);

-	return (error);

-}

-/*

- * Make a directory file.

- */

-/* ARGSUSED */

-int

-sys_mkdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_mkdir_args /* {

-		syscallarg(char *) path;

-		syscallarg(int) mode;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, CREATE, LOCKPARENT | STRIPSLASHES,

-	    UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	if (vp != NULL) {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vrele(vp);

-		return (EEXIST);

-	}

-	VATTR_NULL(&vattr);

-	vattr.va_type = VDIR;

-	vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;

-	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-	error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);

-	if (!error)

-		vput(nd.ni_vp);

-	return (error);

-}

-/*

- * Remove a directory file.

- */

-/* ARGSUSED */

-int

-sys_rmdir(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_rmdir_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct vnode *vp;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,

-	    SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	if (vp->v_type != VDIR) {

-		error = ENOTDIR;

-		goto out;

-	}

-	/*

-	 * No rmdir "." please.

-	 */

-	if (nd.ni_dvp == vp) {

-		error = EBUSY;

-		goto out;

-	}

-	/*

-	 * The root of a mounted filesystem cannot be deleted.

-	 */

-	if (vp->v_flag & VROOT)

-		error = EBUSY;

-out:

-	if (!error) {

-		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

-		VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-		error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

-	} else {

-		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

-		if (nd.ni_dvp == vp)

-			vrele(nd.ni_dvp);

-		else

-			vput(nd.ni_dvp);

-		vput(vp);

-	}

-	return (error);

-}

-/*

- * Read a block of directory entries in a file system independent format.

- */

-int

-sys_getdirentries(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_getdirentries_args /* {

-		syscallarg(int) fd;

-		syscallarg(char *) buf;

-		syscallarg(int) count;

-		syscallarg(long *) basep;

-	} */ *uap = v;

-	struct vnode *vp;

-	struct file *fp;

-	struct uio auio;

-	struct iovec aiov;

-	long loff;

-	int error, eofflag;

-	if (SCARG(uap, count) < 0)

-		return EINVAL;

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	if ((fp->f_flag & FREAD) == 0) {

-		error = EBADF;

-		goto bad;

-	}

-	vp = (struct vnode *)fp->f_data;

-unionread:

-	if (vp->v_type != VDIR) {

-		error = EINVAL;

-		goto bad;

-	}

-	aiov.iov_base = SCARG(uap, buf);

-	aiov.iov_len = SCARG(uap, count);

-	auio.uio_iov = &aiov;

-	auio.uio_iovcnt = 1;

-	auio.uio_rw = UIO_READ;

-	auio.uio_segflg = UIO_USERSPACE;

-	auio.uio_procp = p;

-	auio.uio_resid = SCARG(uap, count);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	loff = auio.uio_offset = fp->f_offset;

-	error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, 0, 0);

-	fp->f_offset = auio.uio_offset;

-	VOP_UNLOCK(vp, 0, p);

-	if (error)

-		goto bad;

-	if ((SCARG(uap, count) == auio.uio_resid) &&

-	    union_check_p &&

-	    (union_check_p(p, &vp, fp, auio, &error) != 0))

-		goto unionread;

-	if (error)

-		goto bad;

-	if ((SCARG(uap, count) == auio.uio_resid) &&

-	    (vp->v_flag & VROOT) &&

-	    (vp->v_mount->mnt_flag & MNT_UNION)) {

-		struct vnode *tvp = vp;

-		vp = vp->v_mount->mnt_vnodecovered;

-		VREF(vp);

-		fp->f_data = (caddr_t) vp;

-		fp->f_offset = 0;

-		vrele(tvp);

-		goto unionread;

-	}

-	error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),

-	    sizeof(long));

-	*retval = SCARG(uap, count) - auio.uio_resid;

-bad:

-	FRELE(fp);

-	return (error);

-}

-/*

- * Set the mode mask for creation of filesystem nodes.

- */

-int

-sys_umask(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_umask_args /* {

-		syscallarg(int) newmask;

-	} */ *uap = v;

-	register struct filedesc *fdp;

-	fdp = p->p_fd;

-	*retval = fdp->fd_cmask;

-	fdp->fd_cmask = SCARG(uap, newmask) & ACCESSPERMS;

-	return (0);

-}

-/*

- * Void all references to file by ripping underlying filesystem

- * away from vnode.

- */

-/* ARGSUSED */

-int

-sys_revoke(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	register struct sys_revoke_args /* {

-		syscallarg(char *) path;

-	} */ *uap = v;

-	register struct vnode *vp;

-	struct vattr vattr;

-	int error;

-	struct nameidata nd;

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	vp = nd.ni_vp;

-	if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)

-		goto out;

-	if (p->p_ucred->cr_uid != vattr.va_uid &&

-	    (error = suser(p->p_ucred, &p->p_acflag)))

-		goto out;

-	if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER)))

-		VOP_REVOKE(vp, REVOKEALL);

-out:

-	vrele(vp);

-	return (error);

-}

-/*

- * Convert a user file descriptor to a kernel file entry.

- *

- * On return *fpp is FREF:ed.

- */

-int

-getvnode(fdp, fd, fpp)

-	struct filedesc *fdp;

-	struct file **fpp;

-	int fd;

-{

-	struct file *fp;

-	if ((fp = fd_getfile(fdp, fd)) == NULL)

-		return (EBADF);

-	if (fp->f_type != DTYPE_VNODE)

-		return (EINVAL);

-	FREF(fp);

-	*fpp = fp;

-	return (0);

-}

-/*

- * Positional read system call.

- */

-int

-sys_pread(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_pread_args /* {

-		syscallarg(int) fd;

-		syscallarg(void *) buf;

-		syscallarg(size_t) nbyte;

-		syscallarg(int) pad;

-		syscallarg(off_t) offset;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct file *fp;

-	struct vnode *vp;

-	off_t offset;

-	int fd = SCARG(uap, fd);

-	if ((fp = fd_getfile(fdp, fd)) == NULL)

-		return (EBADF);

-	if ((fp->f_flag & FREAD) == 0)

-		return (EBADF);

-	vp = (struct vnode *)fp->f_data;

-	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

-		return (ESPIPE);

-	}

-	offset = SCARG(uap, offset);

-	FREF(fp);

-	/* dofileread() will FRELE the descriptor for us */

-	return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),

-	    &offset, retval));

-}

-/*

- * Positional scatter read system call.

- */

-int

-sys_preadv(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_preadv_args /* {

-		syscallarg(int) fd;

-		syscallarg(const struct iovec *) iovp;

-		syscallarg(int) iovcnt;

-		syscallarg(int) pad;

-		syscallarg(off_t) offset;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct file *fp;

-	struct vnode *vp;

-	off_t offset;

-	int fd = SCARG(uap, fd);

-	if ((fp = fd_getfile(fdp, fd)) == NULL)

-		return (EBADF);

-	if ((fp->f_flag & FREAD) == 0)

-		return (EBADF);

-	vp = (struct vnode *)fp->f_data;

-	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

-		return (ESPIPE);

-	}

-	FREF(fp);

-	offset = SCARG(uap, offset);

-	/* dofilereadv() will FRELE the descriptor for us */

-	return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),

-	    &offset, retval));

-}

-/*

- * Positional write system call.

- */

-int

-sys_pwrite(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_pwrite_args /* {

-		syscallarg(int) fd;

-		syscallarg(const void *) buf;

-		syscallarg(size_t) nbyte;

-		syscallarg(int) pad;

-		syscallarg(off_t) offset;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct file *fp;

-	struct vnode *vp;

-	off_t offset;

-	int fd = SCARG(uap, fd);

-	if ((fp = fd_getfile(fdp, fd)) == NULL)

-		return (EBADF);

-	if ((fp->f_flag & FWRITE) == 0)

-		return (EBADF);

-	vp = (struct vnode *)fp->f_data;

-	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

-		return (ESPIPE);

-	}

-	FREF(fp);

-	offset = SCARG(uap, offset);

-	/* dofilewrite() will FRELE the descriptor for us */

-	return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),

-	    &offset, retval));

-}

-/*

- * Positional gather write system call.

- */

-int

-sys_pwritev(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_pwritev_args /* {

-		syscallarg(int) fd;

-		syscallarg(const struct iovec *) iovp;

-		syscallarg(int) iovcnt;

-		syscallarg(int) pad;

-		syscallarg(off_t) offset;

-	} */ *uap = v;

-	struct filedesc *fdp = p->p_fd;

-	struct file *fp;

-	struct vnode *vp;

-	off_t offset;

-	int fd = SCARG(uap, fd);

-	if ((fp = fd_getfile(fdp, fd)) == NULL)

-		return (EBADF);

-	if ((fp->f_flag & FWRITE) == 0)

-		return (EBADF);

-	vp = (struct vnode *)fp->f_data;

-	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

-		return (ESPIPE);

-	}

-	FREF(fp);

-	offset = SCARG(uap, offset);

-	/* dofilewritev() will FRELE the descriptor for us */

-	return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),

-	    &offset, retval));

-}

-#ifdef UFS_EXTATTR

-/*

- * Syscall to push extended attribute configuration information into the

- * VFS.  Accepts a path, which it converts to a mountpoint, as well as

- * a command (int cmd), and attribute name and misc data.  For now, the

- * attribute name is left in userspace for consumption by the VFS_op.

- * It will probably be changed to be copied into sysspace by the

- * syscall in the future, once issues with various consumers of the

- * attribute code have raised their hands.

- *

- * Currently this is used only by UFS Extended Attributes.

- */

-int

-sys_extattrctl(struct proc *p, void *v, register_t *reval)

-{

-	struct sys_extattrctl_args /* {

-		syscallarg(const char *) path;

-		syscallarg(int) cmd;

-		syscallarg(const char *) filename;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-	} */ *uap = v;

-	struct vnode *filename_vp;

-	struct nameidata nd;

-	struct mount *mp;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	/*

-	 * SCARG(uap, attrname) not always defined.  We check again later

-	 * when we invoke the VFS call so as to pass in NULL there if needed.

-	 */

-	if (SCARG(uap, attrname) != NULL) {

-		error = copyinstr(SCARG(uap, attrname), attrname,

-		    EXTATTR_MAXNAMELEN, NULL);

-		if (error)

-			return (error);

-	}

-	/*

-	 * SCARG(uap, filename) not always defined.  If it is, grab

-	 * a vnode lock, which VFS_EXTATTRCTL() will later release.

-	 */

-	filename_vp = NULL;

-	if (SCARG(uap, filename) != NULL) {

-		NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

-		    SCARG(uap, filename), p);

-		if ((error = namei(&nd)) != 0)

-			return (error);

-		filename_vp = nd.ni_vp;

-	}

-	/* SCARG(uap, path) always defined. */

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0) {

-		if (filename_vp != NULL)

-			vput(filename_vp);

-		return (error);

-	}

-	mp = nd.ni_vp->v_mount;

-	if (error) {

-		if (filename_vp != NULL)

-			vput(filename_vp);

-		return (error);

-	}

-	if (SCARG(uap, attrname) != NULL) {

-		error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), filename_vp,

-		    SCARG(uap, attrnamespace), attrname, p);

-	} else {

-		error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), filename_vp,

-		    SCARG(uap, attrnamespace), NULL, p);

-	}

-	/*

-	 * VFS_EXTATTRCTL will have unlocked, but not de-ref'd,

-	 * filename_vp, so vrele it if it is defined.

-	 */

-	if (filename_vp != NULL)

-		vrele(filename_vp);

-	return (error);

-}

-/*-

- * Set a named extended attribute on a file or directory

- *

- * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",

- *            kernelspace string pointer "attrname", userspace buffer

- *            pointer "data", buffer length "nbytes", thread "td".

- * Returns: 0 on success, an error number otherwise

- * Locks: none

- * References: vp must be a valid reference for the duration of the call

- */

-static int

-extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,

-    void *data, size_t nbytes, struct proc *p, register_t *retval)

-{

-	struct uio auio;

-	struct iovec aiov;

-	ssize_t cnt;

-	int error;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	aiov.iov_base = data;

-	aiov.iov_len = nbytes;

-	auio.uio_iov = &aiov;

-	auio.uio_iovcnt = 1;

-	auio.uio_offset = 0;

-	if (nbytes > INT_MAX) {

-		error = EINVAL;

-		goto done;

-	}

-	auio.uio_resid = nbytes;

-	auio.uio_rw = UIO_WRITE;

-	auio.uio_segflg = UIO_USERSPACE;

-	auio.uio_procp = p;

-	cnt = nbytes;

-	error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,

-	    p->p_ucred, p);

-	cnt -= auio.uio_resid;

-	retval[0] = cnt;

-done:

-	VOP_UNLOCK(vp, 0, p);

-	return (error);

-}

-int

-sys_extattr_set_file(struct proc *p, void *v, register_t *retval)

-{

-	struct sys_extattr_set_file_args /* {

-		syscallarg(const char *) path;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-		syscallarg(void *) data;

-		syscallarg(size_t) nbytes;

-	} */ *uap = v;

-	struct nameidata nd;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

-	    NULL);

-	if (error)

-		return (error);

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,

-	    SCARG(uap, data), SCARG(uap, nbytes), p, retval);

-	vrele(nd.ni_vp);

-	return (error);

-}

-int

-sys_extattr_set_fd(struct proc *p, void *v, register_t *retval)

-{

-	struct sys_extattr_set_fd_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-		syscallarg(struct iovec *) iovp;

-		syscallarg(int) iovcnt;

-	} */ *uap = v;

-	struct file *fp;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

-	    NULL);

-	if (error)

-		return (error);

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	error = extattr_set_vp((struct vnode *)fp->f_data,

-	    SCARG(uap, attrnamespace), attrname, SCARG(uap, data),

-	    SCARG(uap, nbytes), p, retval);

-	FRELE(fp);

-	return (error);

-}

-/*-

- * Get a named extended attribute on a file or directory

- *

- * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",

- *            kernelspace string pointer "attrname", userspace buffer

- *            pointer "data", buffer length "nbytes", thread "td".

- * Returns: 0 on success, an error number otherwise

- * Locks: none

- * References: vp must be a valid reference for the duration of the call

- */

-static int

-extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,

-    void *data, size_t nbytes, struct proc *p, register_t *retval)

-{

-	struct uio auio;

-	struct iovec aiov;

-	ssize_t cnt;

-	size_t size;

-	int error;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_READ);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	/*

-	 * Slightly unusual semantics: if the user provides a NULL data

-	 * pointer, they don't want to receive the data, just the

-	 * maximum read length.

-	 */

-	if (data != NULL) {

-		aiov.iov_base = data;

-		aiov.iov_len = nbytes;

-		auio.uio_iov = &aiov;

-		auio.uio_offset = 0;

-		if (nbytes > INT_MAX) {

-			error = EINVAL;

-			goto done;

-		}

-		auio.uio_resid = nbytes;

-		auio.uio_rw = UIO_READ;

-		auio.uio_segflg = UIO_USERSPACE;

-		auio.uio_procp = p;

-		cnt = nbytes;

-		error = VOP_GETEXTATTR(vp, attrnamespace, attrname, &auio,

-		    NULL, p->p_ucred, p);

-		cnt -= auio.uio_resid;

-		retval[0] = cnt;

-	} else {

-		error = VOP_GETEXTATTR(vp, attrnamespace, attrname, NULL,

-		    &size, p->p_ucred, p);

-		retval[0] = size;

-	}

-done:

-	VOP_UNLOCK(vp, 0, p);

-	return (error);

-}

-int

-sys_extattr_get_file(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_extattr_get_file_args /* {

-		syscallarg(const char *) path;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-		syscallarg(void *) data;

-		syscallarg(size_t) nbytes;

-	} */ *uap = v;

-	struct nameidata nd;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

-	    NULL);

-	if (error)

-		return (error);

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return (error);

-	error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,

-	    SCARG(uap, data), SCARG(uap, nbytes), p, retval);

-	vrele(nd.ni_vp);

-	return (error);

-}

-int

-sys_extattr_get_fd(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_extattr_get_fd_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-		syscallarg(void *) data;

-		syscallarg(size_t) nbytes;

-	} */ *uap = v;

-	struct file *fp;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

-	    NULL);

-	if (error)

-		return (error);

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	error = extattr_get_vp((struct vnode *)fp->f_data,

-	    SCARG(uap, attrnamespace), attrname, SCARG(uap, data),

-	    SCARG(uap, nbytes), p, retval);

-	FRELE(fp);

-	return (error);

-}

-/*

- * extattr_delete_vp(): Delete a named extended attribute on a file or

- *                      directory

- *

- * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",

- *            kernelspace string pointer "attrname", proc "p"

- * Returns: 0 on success, an error number otherwise

- * Locks: none

- * References: vp must be a valid reference for the duration of the call

- */

-static int

-extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,

-    struct proc *p)

-{

-	int error;

-	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

-	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

-	error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,

-	    p->p_ucred, p);

-	VOP_UNLOCK(vp, 0, p);

-	return (error);

-}

-int

-sys_extattr_delete_file(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_extattr_delete_file_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-	} */ *uap = v;

-	struct nameidata nd;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

-	     NULL);

-	if (error)

-		return(error);

-	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

-	if ((error = namei(&nd)) != 0)

-		return(error);

-	error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace),

-	    attrname, p);

-	vrele(nd.ni_vp);

-	return(error);

-}

-int

-sys_extattr_delete_fd(p, v, retval)

-	struct proc *p;

-	void *v;

-	register_t *retval;

-{

-	struct sys_extattr_delete_fd_args /* {

-		syscallarg(int) fd;

-		syscallarg(int) attrnamespace;

-		syscallarg(const char *) attrname;

-	} */ *uap = v;

-	struct file *fp;

-	char attrname[EXTATTR_MAXNAMELEN];

-	int error;

-	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

-	    NULL);

-	if (error)

-		return (error);

-	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

-		return (error);

-	error = extattr_delete_vp((struct vnode *)fp->f_data,

-	    SCARG(uap, attrnamespace), attrname, p);

-	FRELE(fp);

-	return (error);

-}

-#endif

--- a/sys/src/cmd/diff/test/diff-t9.expected

+++ b/sys/src/cmd/diff/test/diff-t9.expected

@@ -1,5 +1,5 @@

---- diff-t9.1

-+++ diff-t9.2

+--- diff-t9.l

++++ diff-t9.r

 @@ -1,4 +1,5 @@

 -/*	$NetBSD: vfs_syscalls.c,v 1.57 1995/10/07 06:28:51 mycroft Exp $	*/

 +/*	$OpenBSD: t9.2,v 1.2 2013/12/01 16:40:56 krw Exp $	*/

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t9.l

@@ -1,0 +1,2045 @@

+/*	$NetBSD: vfs_syscalls.c,v 1.57 1995/10/07 06:28:51 mycroft Exp $	*/

+/*

+ * Copyright (c) 1989, 1993

+ *	The Regents of the University of California.  All rights reserved.

+ * (c) UNIX System Laboratories, Inc.

+ * All or some portions of this file are derived from material licensed

+ * to the University of California by American Telephone and Telegraph

+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with

+ * the permission of UNIX System Laboratories, Inc.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions

+ * are met:

+ * 1. Redistributions of source code must retain the above copyright

+ *    notice, this list of conditions and the following disclaimer.

+ * 2. Redistributions in binary form must reproduce the above copyright

+ *    notice, this list of conditions and the following disclaimer in the

+ *    documentation and/or other materials provided with the distribution.

+ * 3. All advertising materials mentioning features or use of this software

+ *    must display the following acknowledgement:

+ *	This product includes software developed by the University of

+ *	California, Berkeley and its contributors.

+ * 4. Neither the name of the University nor the names of its contributors

+ *    may be used to endorse or promote products derived from this software

+ *    without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

+ * SUCH DAMAGE.

+ *

+ *	@(#)vfs_syscalls.c	8.28 (Berkeley) 12/10/94

+ */

+#include <sys/param.h>

+#include <sys/systm.h>

+#include <sys/namei.h>

+#include <sys/filedesc.h>

+#include <sys/kernel.h>

+#include <sys/file.h>

+#include <sys/stat.h>

+#include <sys/vnode.h>

+#include <sys/mount.h>

+#include <sys/proc.h>

+#include <sys/uio.h>

+#include <sys/malloc.h>

+#include <sys/dirent.h>

+#include <sys/syscallargs.h>

+#include <vm/vm.h>

+#include <sys/sysctl.h>

+static int change_dir __P((struct nameidata *ndp, struct proc *p));

+/*

+ * Virtual File System System Calls

+ */

+/*

+ * Mount a file system.

+ */

+/* ARGSUSED */

+sys_mount(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mount_args /* {

+		syscallarg(char *) type;

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+		syscallarg(caddr_t) data;

+	} */ *uap = v;

+	register struct vnode *vp;

+	register struct mount *mp;

+	int error, flag;

+	u_long fsindex;

+	char fstypename[MFSNAMELEN];

+	struct vattr va;

+	struct nameidata nd;

+	/*

+	 * Get vnode to be covered

+	 */

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (SCARG(uap, flags) & MNT_UPDATE) {

+		if ((vp->v_flag & VROOT) == 0) {

+			vput(vp);

+			return (EINVAL);

+		}

+		mp = vp->v_mount;

+		flag = mp->mnt_flag;

+		/*

+		 * We only allow the filesystem to be reloaded if it

+		 * is currently mounted read-only.

+		 */

+		if ((SCARG(uap, flags) & MNT_RELOAD) &&

+		    ((mp->mnt_flag & MNT_RDONLY) == 0)) {

+			vput(vp);

+			return (EOPNOTSUPP);	/* Needs translation */

+		}

+		mp->mnt_flag |=

+		    SCARG(uap, flags) & (MNT_RELOAD | MNT_FORCE | MNT_UPDATE);

+		/*

+		 * Only root, or the user that did the original mount is

+		 * permitted to update it.

+		 */

+		if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&

+		    (error = suser(p->p_ucred, &p->p_acflag))) {

+			vput(vp);

+			return (error);

+		}

+		/*

+		 * Do not allow NFS export by non-root users. Silently

+		 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

+		 */

+		if (p->p_ucred->cr_uid != 0) {

+			if (SCARG(uap, flags) & MNT_EXPORTED) {

+				vput(vp);

+				return (EPERM);

+			}

+			SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

+		}

+		VOP_UNLOCK(vp);

+		goto update;

+	}

+	/*

+	 * If the user is not root, ensure that they own the directory

+	 * onto which we are attempting to mount.

+	 */

+	if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||

+	    (va.va_uid != p->p_ucred->cr_uid &&

+	     (error = suser(p->p_ucred, &p->p_acflag)))) {

+		vput(vp);

+		return (error);

+	}

+	/*

+	 * Do not allow NFS export by non-root users. Silently

+	 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

+	 */

+	if (p->p_ucred->cr_uid != 0) {

+		if (SCARG(uap, flags) & MNT_EXPORTED) {

+			vput(vp);

+			return (EPERM);

+		}

+		SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

+	}

+	if (error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0))

+		return (error);

+	if (vp->v_type != VDIR) {

+		vput(vp);

+		return (ENOTDIR);

+	}

+	if (error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN,

+	    (size_t *)0)) {

+#if defined(COMPAT_09) || defined(COMPAT_43)

+		/*

+		 * Historically filesystem types were identified by number.

+		 * If we get an integer for the filesystem type instead of a

+		 * string, we check to see if it matches one of the historic

+		 * filesystem types.

+		 */

+		fsindex = (u_long)SCARG(uap, type);

+		if (fsindex >= nvfssw || vfssw[fsindex] == NULL) {

+			vput(vp);

+			return (ENODEV);

+		}

+		strncpy(fstypename, vfssw[fsindex]->vfs_name, MFSNAMELEN);

+#else

+		vput(vp);

+		return (error);

+#endif

+	}

+	for (fsindex = 0; fsindex < nvfssw; fsindex++)

+		if (vfssw[fsindex] != NULL &&

+		    !strncmp(vfssw[fsindex]->vfs_name, fstypename, MFSNAMELEN))

+			break;

+	if (fsindex >= nvfssw) {

+		vput(vp);

+		return (ENODEV);

+	}

+	if (vp->v_mountedhere != NULL) {

+		vput(vp);

+		return (EBUSY);

+	}

+	/*

+	 * Allocate and initialize the file system.

+	 */

+	mp = (struct mount *)malloc((u_long)sizeof(struct mount),

+		M_MOUNT, M_WAITOK);

+	bzero((char *)mp, (u_long)sizeof(struct mount));

+	mp->mnt_op = vfssw[fsindex];

+	if (error = vfs_lock(mp)) {

+		free((caddr_t)mp, M_MOUNT);

+		vput(vp);

+		return (error);

+	}

+	/* Do this early in case we block later. */

+	vfssw[fsindex]->vfs_refcount++;

+	vp->v_mountedhere = mp;

+	mp->mnt_vnodecovered = vp;

+	mp->mnt_stat.f_owner = p->p_ucred->cr_uid;

+update:

+	/*

+	 * Set the mount level flags.

+	 */

+	if (SCARG(uap, flags) & MNT_RDONLY)

+		mp->mnt_flag |= MNT_RDONLY;

+	else if (mp->mnt_flag & MNT_RDONLY)

+		mp->mnt_flag |= MNT_WANTRDWR;

+	mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |

+	    MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);

+	mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |

+	    MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);

+	/*

+	 * Mount the filesystem.

+	 */

+	error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);

+	if (mp->mnt_flag & MNT_UPDATE) {

+		vrele(vp);

+		if (mp->mnt_flag & MNT_WANTRDWR)

+			mp->mnt_flag &= ~MNT_RDONLY;

+		mp->mnt_flag &=~

+		    (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);

+		if (error)

+			mp->mnt_flag = flag;

+		return (error);

+	}

+	/*

+	 * Put the new filesystem on the mount list after root.

+	 */

+	cache_purge(vp);

+	if (!error) {

+		TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);

+		checkdirs(vp);

+		VOP_UNLOCK(vp);

+		vfs_unlock(mp);

+		(void) VFS_STATFS(mp, &mp->mnt_stat, p);

+		error = VFS_START(mp, 0, p);

+	} else {

+		mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;

+		vfssw[fsindex]->vfs_refcount--;

+		vfs_unlock(mp);

+		free((caddr_t)mp, M_MOUNT);

+		vput(vp);

+	}

+	return (error);

+}

+/*

+ * Scan all active processes to see if any of them have a current

+ * or root directory onto which the new filesystem has just been

+ * mounted. If so, replace them with the new mount point.

+ */

+checkdirs(olddp)

+	struct vnode *olddp;

+{

+	struct filedesc *fdp;

+	struct vnode *newdp;

+	struct proc *p;

+	if (olddp->v_usecount == 1)

+		return;

+	if (VFS_ROOT(olddp->v_mountedhere, &newdp))

+		panic("mount: lost mount");

+	for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {

+		fdp = p->p_fd;

+		if (fdp->fd_cdir == olddp) {

+			vrele(fdp->fd_cdir);

+			VREF(newdp);

+			fdp->fd_cdir = newdp;

+		}

+		if (fdp->fd_rdir == olddp) {

+			vrele(fdp->fd_rdir);

+			VREF(newdp);

+			fdp->fd_rdir = newdp;

+		}

+	}

+	if (rootvnode == olddp) {

+		vrele(rootvnode);

+		VREF(newdp);

+		rootvnode = newdp;

+	}

+	vput(newdp);

+}

+/*

+ * Unmount a file system.

+ *

+ * Note: unmount takes a path to the vnode mounted on as argument,

+ * not special file (as before).

+ */

+/* ARGSUSED */

+sys_unmount(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_unmount_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct mount *mp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	mp = vp->v_mount;

+	/*

+	 * Only root, or the user that did the original mount is

+	 * permitted to unmount this filesystem.

+	 */

+	if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&

+	    (error = suser(p->p_ucred, &p->p_acflag))) {

+		vput(vp);

+		return (error);

+	}

+	/*

+	 * Don't allow unmounting the root file system.

+	 */

+	if (mp->mnt_flag & MNT_ROOTFS) {

+		vput(vp);

+		return (EINVAL);

+	}

+	/*

+	 * Must be the root of the filesystem

+	 */

+	if ((vp->v_flag & VROOT) == 0) {

+		vput(vp);

+		return (EINVAL);

+	}

+	vput(vp);

+	return (dounmount(mp, SCARG(uap, flags), p));

+}

+/*

+ * Do the actual file system unmount.

+ */

+dounmount(mp, flags, p)

+	register struct mount *mp;

+	int flags;

+	struct proc *p;

+{

+	struct vnode *coveredvp;

+	int error;

+	coveredvp = mp->mnt_vnodecovered;

+	if (vfs_busy(mp))

+		return (EBUSY);

+	mp->mnt_flag |= MNT_UNMOUNT;

+	if (error = vfs_lock(mp))

+		return (error);

+	mp->mnt_flag &=~ MNT_ASYNC;

+	vnode_pager_umount(mp);	/* release cached vnodes */

+	cache_purgevfs(mp);	/* remove cache entries for this file sys */

+	if ((error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0 ||

+	    (flags & MNT_FORCE))

+		error = VFS_UNMOUNT(mp, flags, p);

+	mp->mnt_flag &= ~MNT_UNMOUNT;

+	vfs_unbusy(mp);

+	if (error) {

+		vfs_unlock(mp);

+	} else {

+		TAILQ_REMOVE(&mountlist, mp, mnt_list);

+		if (coveredvp != NULLVP) {

+			vrele(coveredvp);

+			coveredvp->v_mountedhere = (struct mount *)0;

+		}

+		mp->mnt_op->vfs_refcount--;

+		vfs_unlock(mp);

+		if (mp->mnt_vnodelist.lh_first != NULL)

+			panic("unmount: dangling vnode");

+		free((caddr_t)mp, M_MOUNT);

+	}

+	return (error);

+}

+/*

+ * Sync each mounted filesystem.

+ */

+#ifdef DEBUG

+int syncprt = 0;

+struct ctldebug debug0 = { "syncprt", &syncprt };

+#endif

+/* ARGSUSED */

+sys_sync(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct mount *mp, *nmp;

+	int asyncflag;

+	for (mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {

+		/*

+		 * Get the next pointer in case we hang on vfs_busy

+		 * while we are being unmounted.

+		 */

+		nmp = mp->mnt_list.cqe_next;

+		/*

+		 * The lock check below is to avoid races with mount

+		 * and unmount.

+		 */

+		if ((mp->mnt_flag & (MNT_MLOCK|MNT_RDONLY|MNT_MPBUSY)) == 0 &&

+		    !vfs_busy(mp)) {

+			asyncflag = mp->mnt_flag & MNT_ASYNC;

+			mp->mnt_flag &= ~MNT_ASYNC;

+			VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);

+			if (asyncflag)

+				mp->mnt_flag |= MNT_ASYNC;

+			/*

+			 * Get the next pointer again, as the next filesystem

+			 * might have been unmounted while we were sync'ing.

+			 */

+			nmp = mp->mnt_list.cqe_next;

+			vfs_unbusy(mp);

+		}

+	}

+#ifdef DEBUG

+	if (syncprt)

+		vfs_bufstats();

+#endif /* DEBUG */

+	return (0);

+}

+/*

+ * Change filesystem quotas.

+ */

+/* ARGSUSED */

+sys_quotactl(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_quotactl_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) cmd;

+		syscallarg(int) uid;

+		syscallarg(caddr_t) arg;

+	} */ *uap = v;

+	register struct mount *mp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	mp = nd.ni_vp->v_mount;

+	vrele(nd.ni_vp);

+	return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),

+	    SCARG(uap, arg), p));

+}

+/*

+ * Get filesystem statistics.

+ */

+/* ARGSUSED */

+sys_statfs(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_statfs_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct statfs *) buf;

+	} */ *uap = v;

+	register struct mount *mp;

+	register struct statfs *sp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	mp = nd.ni_vp->v_mount;

+	sp = &mp->mnt_stat;

+	vrele(nd.ni_vp);

+	if (error = VFS_STATFS(mp, sp, p))

+		return (error);

+	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

+}

+/*

+ * Get filesystem statistics.

+ */

+/* ARGSUSED */

+sys_fstatfs(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fstatfs_args /* {

+		syscallarg(int) fd;

+		syscallarg(struct statfs *) buf;

+	} */ *uap = v;

+	struct file *fp;

+	struct mount *mp;

+	register struct statfs *sp;

+	int error;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	mp = ((struct vnode *)fp->f_data)->v_mount;

+	sp = &mp->mnt_stat;

+	if (error = VFS_STATFS(mp, sp, p))

+		return (error);

+	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

+}

+/*

+ * Get statistics on all filesystems.

+ */

+sys_getfsstat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_getfsstat_args /* {

+		syscallarg(struct statfs *) buf;

+		syscallarg(long) bufsize;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct mount *mp, *nmp;

+	register struct statfs *sp;

+	caddr_t sfsp;

+	long count, maxcount, error;

+	maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);

+	sfsp = (caddr_t)SCARG(uap, buf);

+	for (count = 0,

+	     mp = mountlist.cqh_first; mp != (void *)&mountlist; mp = nmp) {

+		nmp = mp->mnt_list.cqe_next;

+		if (sfsp && count < maxcount &&

+		    ((mp->mnt_flag & MNT_MLOCK) == 0)) {

+			sp = &mp->mnt_stat;

+			/*

+			 * If MNT_NOWAIT is specified, do not refresh the

+			 * fsstat cache. MNT_WAIT overrides MNT_NOWAIT.

+			 */

+			if (((SCARG(uap, flags) & MNT_NOWAIT) == 0 ||

+			    (SCARG(uap, flags) & MNT_WAIT)) &&

+			    (error = VFS_STATFS(mp, sp, p)))

+				continue;

+			sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+			if (error = copyout((caddr_t)sp, sfsp, sizeof(*sp)))

+				return (error);

+			sfsp += sizeof(*sp);

+		}

+		count++;

+	}

+	if (sfsp && count > maxcount)

+		*retval = maxcount;

+	else

+		*retval = count;

+	return (0);

+}

+/*

+ * Change current working directory to a given file descriptor.

+ */

+/* ARGSUSED */

+sys_fchdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fchdir_args /* {

+		syscallarg(int) fd;

+	} */ *uap = v;

+	register struct filedesc *fdp = p->p_fd;

+	struct vnode *vp, *tdp;

+	struct mount *mp;

+	struct file *fp;

+	int error;

+	if (error = getvnode(fdp, SCARG(uap, fd), &fp))

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VREF(vp);

+	VOP_LOCK(vp);

+	if (vp->v_type != VDIR)

+		error = ENOTDIR;

+	else

+		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

+	while (!error && (mp = vp->v_mountedhere) != NULL) {

+		if (mp->mnt_flag & MNT_MLOCK) {

+			mp->mnt_flag |= MNT_MWAIT;

+			sleep((caddr_t)mp, PVFS);

+			continue;

+		}

+		if (error = VFS_ROOT(mp, &tdp))

+			break;

+		vput(vp);

+		vp = tdp;

+	}

+	VOP_UNLOCK(vp);

+	if (error) {

+		vrele(vp);

+		return (error);

+	}

+	vrele(fdp->fd_cdir);

+	fdp->fd_cdir = vp;

+	return (0);

+}

+/*

+ * Change current working directory (``.'').

+ */

+/* ARGSUSED */

+sys_chdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_chdir_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct filedesc *fdp = p->p_fd;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = change_dir(&nd, p))

+		return (error);

+	vrele(fdp->fd_cdir);

+	fdp->fd_cdir = nd.ni_vp;

+	return (0);

+}

+/*

+ * Change notion of root (``/'') directory.

+ */

+/* ARGSUSED */

+sys_chroot(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_chroot_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct filedesc *fdp = p->p_fd;

+	int error;

+	struct nameidata nd;

+	if (error = suser(p->p_ucred, &p->p_acflag))

+		return (error);

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = change_dir(&nd, p))

+		return (error);

+	if (fdp->fd_rdir != NULL)

+		vrele(fdp->fd_rdir);

+	fdp->fd_rdir = nd.ni_vp;

+	return (0);

+}

+/*

+ * Common routine for chroot and chdir.

+ */

+static int

+change_dir(ndp, p)

+	register struct nameidata *ndp;

+	struct proc *p;

+{

+	struct vnode *vp;

+	int error;

+	if (error = namei(ndp))

+		return (error);

+	vp = ndp->ni_vp;

+	if (vp->v_type != VDIR)

+		error = ENOTDIR;

+	else

+		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

+	VOP_UNLOCK(vp);

+	if (error)

+		vrele(vp);

+	return (error);

+}

+/*

+ * Check permissions, allocate an open file structure,

+ * and call the device open routine if any.

+ */

+sys_open(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_open_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	register struct filedesc *fdp = p->p_fd;

+	register struct file *fp;

+	register struct vnode *vp;

+	int flags, cmode;

+	struct file *nfp;

+	int type, indx, error;

+	struct flock lf;

+	struct nameidata nd;

+	extern struct fileops vnops;

+	if (error = falloc(p, &nfp, &indx))

+		return (error);

+	fp = nfp;

+	flags = FFLAGS(SCARG(uap, flags));

+	cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	p->p_dupfd = -indx - 1;			/* XXX check for fdopen */

+	if (error = vn_open(&nd, flags, cmode)) {

+		ffree(fp);

+		if ((error == ENODEV || error == ENXIO) &&

+		    p->p_dupfd >= 0 &&			/* XXX from fdopen */

+		    (error =

+			dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {

+			*retval = indx;

+			return (0);

+		}

+		if (error == ERESTART)

+			error = EINTR;

+		fdp->fd_ofiles[indx] = NULL;

+		return (error);

+	}

+	p->p_dupfd = 0;

+	vp = nd.ni_vp;

+	fp->f_flag = flags & FMASK;

+	fp->f_type = DTYPE_VNODE;

+	fp->f_ops = &vnops;

+	fp->f_data = (caddr_t)vp;

+	if (flags & (O_EXLOCK | O_SHLOCK)) {

+		lf.l_whence = SEEK_SET;

+		lf.l_start = 0;

+		lf.l_len = 0;

+		if (flags & O_EXLOCK)

+			lf.l_type = F_WRLCK;

+		else

+			lf.l_type = F_RDLCK;

+		type = F_FLOCK;

+		if ((flags & FNONBLOCK) == 0)

+			type |= F_WAIT;

+		VOP_UNLOCK(vp);

+		if (error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type)) {

+			(void) vn_close(vp, fp->f_flag, fp->f_cred, p);

+			ffree(fp);

+			fdp->fd_ofiles[indx] = NULL;

+			return (error);

+		}

+		VOP_LOCK(vp);

+		fp->f_flag |= FHASLOCK;

+	}

+	VOP_UNLOCK(vp);

+	*retval = indx;

+	return (0);

+}

+/*

+ * Create a special file.

+ */

+/* ARGSUSED */

+sys_mknod(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mknod_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+		syscallarg(int) dev;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	int whiteout;

+	struct nameidata nd;

+	if (error = suser(p->p_ucred, &p->p_acflag))

+		return (error);

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (vp != NULL)

+		error = EEXIST;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

+		vattr.va_rdev = SCARG(uap, dev);

+		whiteout = 0;

+		switch (SCARG(uap, mode) & S_IFMT) {

+		case S_IFMT:	/* used by badsect to flag bad sectors */

+			vattr.va_type = VBAD;

+			break;

+		case S_IFCHR:

+			vattr.va_type = VCHR;

+			break;

+		case S_IFBLK:

+			vattr.va_type = VBLK;

+			break;

+		case S_IFWHT:

+			whiteout = 1;

+			break;

+		default:

+			error = EINVAL;

+			break;

+		}

+	}

+	if (!error) {

+		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		if (whiteout) {

+			error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);

+			if (error)

+				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+			vput(nd.ni_dvp);

+		} else {

+			error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,

+						&nd.ni_cnd, &vattr);

+		}

+	} else {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		if (vp)

+			vrele(vp);

+	}

+	return (error);

+}

+/*

+ * Create a named pipe.

+ */

+/* ARGSUSED */

+sys_mkfifo(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mkfifo_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+#ifndef FIFO

+	return (EOPNOTSUPP);

+#else

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	if (nd.ni_vp != NULL) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(nd.ni_vp);

+		return (EEXIST);

+	}

+	VATTR_NULL(&vattr);

+	vattr.va_type = VFIFO;

+	vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));

+#endif /* FIFO */

+}

+/*

+ * Make a hard file link.

+ */

+/* ARGSUSED */

+sys_link(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_link_args /* {

+		syscallarg(char *) path;

+		syscallarg(char *) link;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct nameidata nd;

+	int error;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (vp->v_type != VDIR ||

+	    (error = suser(p->p_ucred, &p->p_acflag)) == 0) {

+		nd.ni_cnd.cn_nameiop = CREATE;

+		nd.ni_cnd.cn_flags = LOCKPARENT;

+		nd.ni_dirp = SCARG(uap, link);

+		if ((error = namei(&nd)) == 0) {

+			if (nd.ni_vp != NULL)

+				error = EEXIST;

+			if (!error) {

+				VOP_LEASE(nd.ni_dvp, p, p->p_ucred,

+				    LEASE_WRITE);

+				VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+				error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);

+			} else {

+				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+				if (nd.ni_dvp == nd.ni_vp)

+					vrele(nd.ni_dvp);

+				else

+					vput(nd.ni_dvp);

+				if (nd.ni_vp)

+					vrele(nd.ni_vp);

+			}

+		}

+	}

+	vrele(vp);

+	return (error);

+}

+/*

+ * Make a symbolic link.

+ */

+/* ARGSUSED */

+sys_symlink(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_symlink_args /* {

+		syscallarg(char *) path;

+		syscallarg(char *) link;

+	} */ *uap = v;

+	struct vattr vattr;

+	char *path;

+	int error;

+	struct nameidata nd;

+	MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);

+	if (error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, (size_t *)0))

+		goto out;

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);

+	if (error = namei(&nd))

+		goto out;

+	if (nd.ni_vp) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(nd.ni_vp);

+		error = EEXIST;

+		goto out;

+	}

+	VATTR_NULL(&vattr);

+	vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);

+out:

+	FREE(path, M_NAMEI);

+	return (error);

+}

+/*

+ * Delete a whiteout from the filesystem.

+ */

+/* ARGSUSED */

+sys_undelete(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_undelete_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	error = namei(&nd);

+	if (error)

+		return (error);

+	if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		if (nd.ni_vp)

+			vrele(nd.ni_vp);

+		return (EEXIST);

+	}

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	if (error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE))

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+	vput(nd.ni_dvp);

+	return (error);

+}

+/*

+ * Delete a name from the filesystem.

+ */

+/* ARGSUSED */

+sys_unlink(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_unlink_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct vnode *vp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, DELETE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_type != VDIR ||

+	    (error = suser(p->p_ucred, &p->p_acflag)) == 0) {

+		/*

+		 * The root of a mounted filesystem cannot be deleted.

+		 */

+		if (vp->v_flag & VROOT)

+			error = EBUSY;

+		else

+			(void)vnode_pager_uncache(vp);

+	}

+	if (!error) {

+		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

+	} else {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		if (vp != NULLVP)

+			vput(vp);

+	}

+	return (error);

+}

+/*

+ * Reposition read/write file offset.

+ */

+sys_lseek(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_lseek_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) pad;

+		syscallarg(off_t) offset;

+		syscallarg(int) whence;

+	} */ *uap = v;

+	struct ucred *cred = p->p_ucred;

+	register struct filedesc *fdp = p->p_fd;

+	register struct file *fp;

+	struct vattr vattr;

+	int error;

+	if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||

+	    (fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL)

+		return (EBADF);

+	if (fp->f_type != DTYPE_VNODE)

+		return (ESPIPE);

+	switch (SCARG(uap, whence)) {

+	case L_INCR:

+		fp->f_offset += SCARG(uap, offset);

+		break;

+	case L_XTND:

+		if (error =

+		    VOP_GETATTR((struct vnode *)fp->f_data, &vattr, cred, p))

+			return (error);

+		fp->f_offset = SCARG(uap, offset) + vattr.va_size;

+		break;

+	case L_SET:

+		fp->f_offset = SCARG(uap, offset);

+		break;

+	default:

+		return (EINVAL);

+	}

+	*(off_t *)retval = fp->f_offset;

+	return (0);

+}

+/*

+ * Check access permissions.

+ */

+sys_access(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_access_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct ucred *cred = p->p_ucred;

+	register struct vnode *vp;

+	int error, flags, t_gid, t_uid;

+	struct nameidata nd;

+	t_uid = cred->cr_uid;

+	t_gid = cred->cr_gid;

+	cred->cr_uid = p->p_cred->p_ruid;

+	cred->cr_gid = p->p_cred->p_rgid;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		goto out1;

+	vp = nd.ni_vp;

+	/* Flags == 0 means only check for existence. */

+	if (SCARG(uap, flags)) {

+		flags = 0;

+		if (SCARG(uap, flags) & R_OK)

+			flags |= VREAD;

+		if (SCARG(uap, flags) & W_OK)

+			flags |= VWRITE;

+		if (SCARG(uap, flags) & X_OK)

+			flags |= VEXEC;

+		if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)

+			error = VOP_ACCESS(vp, flags, cred, p);

+	}

+	vput(vp);

+out1:

+	cred->cr_uid = t_uid;

+	cred->cr_gid = t_gid;

+	return (error);

+}

+/*

+ * Get file status; this version follows links.

+ */

+/* ARGSUSED */

+sys_stat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_stat_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct stat *) ub;

+	} */ *uap = v;

+	struct stat sb;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	error = vn_stat(nd.ni_vp, &sb, p);

+	vput(nd.ni_vp);

+	if (error)

+		return (error);

+	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

+	return (error);

+}

+/*

+ * Get file status; this version does not follow links.

+ */

+/* ARGSUSED */

+sys_lstat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_lstat_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct stat *) ub;

+	} */ *uap = v;

+	int error;

+	struct vnode *vp, *dvp;

+	struct stat sb, sb1;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | LOCKPARENT, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	/*

+	 * For symbolic links, always return the attributes of its

+	 * containing directory, except for mode, size, and links.

+	 */

+	vp = nd.ni_vp;

+	dvp = nd.ni_dvp;

+	if (vp->v_type != VLNK) {

+		if (dvp == vp)

+			vrele(dvp);

+		else

+			vput(dvp);

+		error = vn_stat(vp, &sb, p);

+		vput(vp);

+		if (error)

+			return (error);

+	} else {

+		error = vn_stat(dvp, &sb, p);

+		vput(dvp);

+		if (error) {

+			vput(vp);

+			return (error);

+		}

+		error = vn_stat(vp, &sb1, p);

+		vput(vp);

+		if (error)

+			return (error);

+		sb.st_mode &= ~S_IFDIR;

+		sb.st_mode |= S_IFLNK;

+		sb.st_nlink = sb1.st_nlink;

+		sb.st_size = sb1.st_size;

+		sb.st_blocks = sb1.st_blocks;

+	}

+	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

+	return (error);

+}

+/*

+ * Get configurable pathname variables.

+ */

+/* ARGSUSED */

+sys_pathconf(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_pathconf_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) name;

+	} */ *uap = v;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);

+	vput(nd.ni_vp);

+	return (error);

+}

+/*

+ * Return target name of a symbolic link.

+ */

+/* ARGSUSED */

+sys_readlink(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_readlink_args /* {

+		syscallarg(char *) path;

+		syscallarg(char *) buf;

+		syscallarg(int) count;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct iovec aiov;

+	struct uio auio;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (vp->v_type != VLNK)

+		error = EINVAL;

+	else {

+		aiov.iov_base = SCARG(uap, buf);

+		aiov.iov_len = SCARG(uap, count);

+		auio.uio_iov = &aiov;

+		auio.uio_iovcnt = 1;

+		auio.uio_offset = 0;

+		auio.uio_rw = UIO_READ;

+		auio.uio_segflg = UIO_USERSPACE;

+		auio.uio_procp = p;

+		auio.uio_resid = SCARG(uap, count);

+		error = VOP_READLINK(vp, &auio, p->p_ucred);

+	}

+	vput(vp);

+	*retval = SCARG(uap, count) - auio.uio_resid;

+	return (error);

+}

+/*

+ * Change flags of a file given a path name.

+ */

+/* ARGSUSED */

+sys_chflags(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_chflags_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_flags = SCARG(uap, flags);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Change flags of a file given a file descriptor.

+ */

+/* ARGSUSED */

+sys_fchflags(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fchflags_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_flags = SCARG(uap, flags);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	VOP_UNLOCK(vp);

+	return (error);

+}

+/*

+ * Change mode of a file given path name.

+ */

+/* ARGSUSED */

+sys_chmod(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_chmod_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Change mode of a file given a file descriptor.

+ */

+/* ARGSUSED */

+sys_fchmod(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fchmod_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	VOP_UNLOCK(vp);

+	return (error);

+}

+/*

+ * Set ownership given a path name.

+ */

+/* ARGSUSED */

+sys_chown(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_chown_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) uid;

+		syscallarg(int) gid;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_uid = SCARG(uap, uid);

+		vattr.va_gid = SCARG(uap, gid);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Set ownership given a file descriptor.

+ */

+/* ARGSUSED */

+sys_fchown(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fchown_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) uid;

+		syscallarg(int) gid;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_uid = SCARG(uap, uid);

+		vattr.va_gid = SCARG(uap, gid);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	VOP_UNLOCK(vp);

+	return (error);

+}

+/*

+ * Set the access and modification times of a file.

+ */

+/* ARGSUSED */

+sys_utimes(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_utimes_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct timeval *) tptr;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct timeval tv[2];

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	VATTR_NULL(&vattr);

+	if (SCARG(uap, tptr) == NULL) {

+		microtime(&tv[0]);

+		tv[1] = tv[0];

+		vattr.va_vaflags |= VA_UTIMES_NULL;

+	} else if (error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,

+	    sizeof (tv)))

+  		return (error);

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		vattr.va_atime.ts_sec = tv[0].tv_sec;

+		vattr.va_atime.ts_nsec = tv[0].tv_usec * 1000;

+		vattr.va_mtime.ts_sec = tv[1].tv_sec;

+		vattr.va_mtime.ts_nsec = tv[1].tv_usec * 1000;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Truncate a file given its path name.

+ */

+/* ARGSUSED */

+sys_truncate(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_truncate_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) pad;

+		syscallarg(off_t) length;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_type == VDIR)

+		error = EISDIR;

+	else if ((error = vn_writechk(vp)) == 0 &&

+	    (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {

+		VATTR_NULL(&vattr);

+		vattr.va_size = SCARG(uap, length);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Truncate a file given a file descriptor.

+ */

+/* ARGSUSED */

+sys_ftruncate(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_ftruncate_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) pad;

+		syscallarg(off_t) length;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	if ((fp->f_flag & FWRITE) == 0)

+		return (EINVAL);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LOCK(vp);

+	if (vp->v_type == VDIR)

+		error = EISDIR;

+	else if ((error = vn_writechk(vp)) == 0) {

+		VATTR_NULL(&vattr);

+		vattr.va_size = SCARG(uap, length);

+		error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);

+	}

+	VOP_UNLOCK(vp);

+	return (error);

+}

+/*

+ * Sync an open file.

+ */

+/* ARGSUSED */

+sys_fsync(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fsync_args /* {

+		syscallarg(int) fd;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct file *fp;

+	int error;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LOCK(vp);

+	error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);

+	VOP_UNLOCK(vp);

+	return (error);

+}

+/*

+ * Rename files.  Source and destination must either both be directories,

+ * or both not be directories.  If target is a directory, it must be empty.

+ */

+/* ARGSUSED */

+sys_rename(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_rename_args /* {

+		syscallarg(char *) from;

+		syscallarg(char *) to;

+	} */ *uap = v;

+	register struct vnode *tvp, *fvp, *tdvp;

+	struct nameidata fromnd, tond;

+	int error;

+	NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,

+	    SCARG(uap, from), p);

+	if (error = namei(&fromnd))

+		return (error);

+	fvp = fromnd.ni_vp;

+	NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART,

+	    UIO_USERSPACE, SCARG(uap, to), p);

+	if (error = namei(&tond)) {

+		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

+		vrele(fromnd.ni_dvp);

+		vrele(fvp);

+		goto out1;

+	}

+	tdvp = tond.ni_dvp;

+	tvp = tond.ni_vp;

+	if (tvp != NULL) {

+		if (fvp->v_type == VDIR && tvp->v_type != VDIR) {

+			error = ENOTDIR;

+			goto out;

+		} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {

+			error = EISDIR;

+			goto out;

+		}

+	}

+	if (fvp == tdvp)

+		error = EINVAL;

+	/*

+	 * If source is the same as the destination (that is the

+	 * same inode number with the same name in the same directory),

+	 * then there is nothing to do.

+	 */

+	if (fvp == tvp && fromnd.ni_dvp == tdvp &&

+	    fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen &&

+	    !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr,

+	      fromnd.ni_cnd.cn_namelen))

+		error = -1;

+out:

+	if (!error) {

+		VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);

+		if (fromnd.ni_dvp != tdvp)

+			VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		if (tvp)

+			VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);

+		error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,

+				   tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);

+	} else {

+		VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);

+		if (tdvp == tvp)

+			vrele(tdvp);

+		else

+			vput(tdvp);

+		if (tvp)

+			vput(tvp);

+		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

+		vrele(fromnd.ni_dvp);

+		vrele(fvp);

+	}

+	vrele(tond.ni_startdir);

+	FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);

+out1:

+	if (fromnd.ni_startdir)

+		vrele(fromnd.ni_startdir);

+	FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);

+	if (error == -1)

+		return (0);

+	return (error);

+}

+/*

+ * Make a directory file.

+ */

+/* ARGSUSED */

+sys_mkdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mkdir_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (vp != NULL) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(vp);

+		return (EEXIST);

+	}

+	VATTR_NULL(&vattr);

+	vattr.va_type = VDIR;

+	vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);

+	if (!error)

+		vput(nd.ni_vp);

+	return (error);

+}

+/*

+ * Remove a directory file.

+ */

+/* ARGSUSED */

+sys_rmdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_rmdir_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct vnode *vp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (vp->v_type != VDIR) {

+		error = ENOTDIR;

+		goto out;

+	}

+	/*

+	 * No rmdir "." please.

+	 */

+	if (nd.ni_dvp == vp) {

+		error = EINVAL;

+		goto out;

+	}

+	/*

+	 * The root of a mounted filesystem cannot be deleted.

+	 */

+	if (vp->v_flag & VROOT)

+		error = EBUSY;

+out:

+	if (!error) {

+		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+		error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

+	} else {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vput(vp);

+	}

+	return (error);

+}

+/*

+ * Read a block of directory entries in a file system independent format.

+ */

+sys_getdirentries(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_getdirentries_args /* {

+		syscallarg(int) fd;

+		syscallarg(char *) buf;

+		syscallarg(u_int) count;

+		syscallarg(long *) basep;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct file *fp;

+	struct uio auio;

+	struct iovec aiov;

+	long loff;

+	int error, eofflag;

+	if (error = getvnode(p->p_fd, SCARG(uap, fd), &fp))

+		return (error);

+	if ((fp->f_flag & FREAD) == 0)

+		return (EBADF);

+	vp = (struct vnode *)fp->f_data;

+unionread:

+	if (vp->v_type != VDIR)

+		return (EINVAL);

+	aiov.iov_base = SCARG(uap, buf);

+	aiov.iov_len = SCARG(uap, count);

+	auio.uio_iov = &aiov;

+	auio.uio_iovcnt = 1;

+	auio.uio_rw = UIO_READ;

+	auio.uio_segflg = UIO_USERSPACE;

+	auio.uio_procp = p;

+	auio.uio_resid = SCARG(uap, count);

+	VOP_LOCK(vp);

+	loff = auio.uio_offset = fp->f_offset;

+	error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, (u_long *)0, 0);

+	fp->f_offset = auio.uio_offset;

+	VOP_UNLOCK(vp);

+	if (error)

+		return (error);

+#ifdef UNION

+{

+	extern int (**union_vnodeop_p)();

+	extern struct vnode *union_dircache __P((struct vnode *));

+	if ((SCARG(uap, count) == auio.uio_resid) &&

+	    (vp->v_op == union_vnodeop_p)) {

+		struct vnode *lvp;

+		lvp = union_dircache(vp);

+		if (lvp != NULLVP) {

+			struct vattr va;

+			/*

+			 * If the directory is opaque,

+			 * then don't show lower entries

+			 */

+			error = VOP_GETATTR(vp, &va, fp->f_cred, p);

+			if (va.va_flags & OPAQUE) {

+				vput(lvp);

+				lvp = NULL;

+			}

+		}

+		if (lvp != NULLVP) {

+			error = VOP_OPEN(lvp, FREAD, fp->f_cred, p);

+			VOP_UNLOCK(lvp);

+			if (error) {

+				vrele(lvp);

+				return (error);

+			}

+			fp->f_data = (caddr_t) lvp;

+			fp->f_offset = 0;

+			error = vn_close(vp, FREAD, fp->f_cred, p);

+			if (error)

+				return (error);

+			vp = lvp;

+			goto unionread;

+		}

+	}

+}

+#endif /* UNION */

+	if ((SCARG(uap, count) == auio.uio_resid) &&

+	    (vp->v_flag & VROOT) &&

+	    (vp->v_mount->mnt_flag & MNT_UNION)) {

+		struct vnode *tvp = vp;

+		vp = vp->v_mount->mnt_vnodecovered;

+		VREF(vp);

+		fp->f_data = (caddr_t) vp;

+		fp->f_offset = 0;

+		vrele(tvp);

+		goto unionread;

+	}

+	error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),

+	    sizeof(long));

+	*retval = SCARG(uap, count) - auio.uio_resid;

+	return (error);

+}

+/*

+ * Set the mode mask for creation of filesystem nodes.

+ */

+int

+sys_umask(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_umask_args /* {

+		syscallarg(int) newmask;

+	} */ *uap = v;

+	register struct filedesc *fdp;

+	fdp = p->p_fd;

+	*retval = fdp->fd_cmask;

+	fdp->fd_cmask = SCARG(uap, newmask) & ALLPERMS;

+	return (0);

+}

+/*

+ * Void all references to file by ripping underlying filesystem

+ * away from vnode.

+ */

+/* ARGSUSED */

+sys_revoke(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_revoke_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if (error = namei(&nd))

+		return (error);

+	vp = nd.ni_vp;

+	if (vp->v_type != VCHR && vp->v_type != VBLK) {

+		error = EINVAL;

+		goto out;

+	}

+	if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))

+		goto out;

+	if (p->p_ucred->cr_uid != vattr.va_uid &&

+	    (error = suser(p->p_ucred, &p->p_acflag)))

+		goto out;

+	if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))

+		vgoneall(vp);

+out:

+	vrele(vp);

+	return (error);

+}

+/*

+ * Convert a user file descriptor to a kernel file entry.

+ */

+getvnode(fdp, fd, fpp)

+	struct filedesc *fdp;

+	struct file **fpp;

+	int fd;

+{

+	struct file *fp;

+	if ((u_int)fd >= fdp->fd_nfiles ||

+	    (fp = fdp->fd_ofiles[fd]) == NULL)

+		return (EBADF);

+	if (fp->f_type != DTYPE_VNODE)

+		return (EINVAL);

+	*fpp = fp;

+	return (0);

+}

--- /dev/null

+++ b/sys/src/cmd/diff/test/diff-t9.r

@@ -1,0 +1,3216 @@

+/*	$OpenBSD: t9.2,v 1.2 2013/12/01 16:40:56 krw Exp $	*/

+/*	$NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $	*/

+/*

+ * Copyright (c) 1989, 1993

+ *	The Regents of the University of California.  All rights reserved.

+ * (c) UNIX System Laboratories, Inc.

+ * All or some portions of this file are derived from material licensed

+ * to the University of California by American Telephone and Telegraph

+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with

+ * the permission of UNIX System Laboratories, Inc.

+ *

+ * Redistribution and use in source and binary forms, with or without

+ * modification, are permitted provided that the following conditions

+ * are met:

+ * 1. Redistributions of source code must retain the above copyright

+ *    notice, this list of conditions and the following disclaimer.

+ * 2. Redistributions in binary form must reproduce the above copyright

+ *    notice, this list of conditions and the following disclaimer in the

+ *    documentation and/or other materials provided with the distribution.

+ * 3. Neither the name of the University nor the names of its contributors

+ *    may be used to endorse or promote products derived from this software

+ *    without specific prior written permission.

+ *

+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

+ * SUCH DAMAGE.

+ *

+ *	@(#)vfs_syscalls.c	8.28 (Berkeley) 12/10/94

+ */

+#include <sys/param.h>

+#include <sys/systm.h>

+#include <sys/namei.h>

+#include <sys/filedesc.h>

+#include <sys/kernel.h>

+#include <sys/file.h>

+#include <sys/stat.h>

+#include <sys/vnode.h>

+#include <sys/mount.h>

+#include <sys/proc.h>

+#include <sys/uio.h>

+#include <sys/malloc.h>

+#include <sys/dirent.h>

+#include <sys/extattr.h>

+#include <sys/syscallargs.h>

+#include <uvm/uvm_extern.h>

+#include <sys/sysctl.h>

+extern int suid_clear;

+int	usermount = 0;		/* sysctl: by default, users may not mount */

+static int change_dir(struct nameidata *, struct proc *);

+void checkdirs(struct vnode *);

+/*

+ * Redirection info so we don't have to include the union fs routines in

+ * the kernel directly.  This way, we can build unionfs as an LKM.  The

+ * pointer gets filled in later, when we modload the LKM, or when the

+ * compiled-in unionfs code gets initialized.  For now, we just set

+ * it to a stub routine.

+ */

+int (*union_check_p)(struct proc *, struct vnode **,

+    struct file *, struct uio, int *) = NULL;

+/*

+ * Virtual File System System Calls

+ */

+/*

+ * Mount a file system.

+ */

+/* ARGSUSED */

+int

+sys_mount(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mount_args /* {

+		syscallarg(char *) type;

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+		syscallarg(void *) data;

+	} */ *uap = v;

+	register struct vnode *vp;

+	register struct mount *mp;

+	int error, flag = 0;

+#ifdef COMPAT_43

+	u_long fstypenum = 0;

+#endif

+	char fstypename[MFSNAMELEN];

+	char fspath[MNAMELEN];

+	struct vattr va;

+	struct nameidata nd;

+	struct vfsconf *vfsp;

+	struct timeval tv;

+	if (usermount == 0 && (error = suser(p->p_ucred, &p->p_acflag)))

+		return (error);

+	/*

+	 * Mount points must fit in MNAMELEN, not MAXPATHLEN.

+	 */

+	error = copyinstr(SCARG(uap, path), fspath, MNAMELEN, NULL);

+	if (error)

+		return(error);

+	/*

+	 * Get vnode to be covered

+	 */

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspath, p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	if (SCARG(uap, flags) & MNT_UPDATE) {

+		if ((vp->v_flag & VROOT) == 0) {

+			vput(vp);

+			return (EINVAL);

+		}

+		mp = vp->v_mount;

+		flag = mp->mnt_flag;

+		/*

+		 * We only allow the filesystem to be reloaded if it

+		 * is currently mounted read-only.

+		 */

+		if ((SCARG(uap, flags) & MNT_RELOAD) &&

+		    ((mp->mnt_flag & MNT_RDONLY) == 0)) {

+			vput(vp);

+			return (EOPNOTSUPP);	/* Needs translation */

+		}

+		mp->mnt_flag |=

+		    SCARG(uap, flags) & (MNT_RELOAD | MNT_UPDATE);

+		/*

+		 * Only root, or the user that did the original mount is

+		 * permitted to update it.

+		 */

+		if (mp->mnt_stat.f_owner != p->p_ucred->cr_uid &&

+		    (error = suser(p->p_ucred, &p->p_acflag))) {

+			vput(vp);

+			return (error);

+		}

+		/*

+		 * Do not allow NFS export by non-root users. Silently

+		 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

+		 */

+		if (p->p_ucred->cr_uid != 0) {

+			if (SCARG(uap, flags) & MNT_EXPORTED) {

+				vput(vp);

+				return (EPERM);

+			}

+			SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

+		}

+		if ((error = vfs_busy(mp, LK_NOWAIT, 0, p)) != 0) {

+			vput(vp);

+			return (error);

+		}

+		VOP_UNLOCK(vp, 0, p);

+		goto update;

+	}

+	/*

+	 * If the user is not root, ensure that they own the directory

+	 * onto which we are attempting to mount.

+	 */

+	if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) ||

+	    (va.va_uid != p->p_ucred->cr_uid &&

+	    (error = suser(p->p_ucred, &p->p_acflag)))) {

+		vput(vp);

+		return (error);

+	}

+	/*

+	 * Do not allow NFS export by non-root users. Silently

+	 * enforce MNT_NOSUID and MNT_NODEV for non-root users.

+	 */

+	if (p->p_ucred->cr_uid != 0) {

+		if (SCARG(uap, flags) & MNT_EXPORTED) {

+			vput(vp);

+			return (EPERM);

+		}

+		SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV;

+	}

+	if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0)

+		return (error);

+	if (vp->v_type != VDIR) {

+		vput(vp);

+		return (ENOTDIR);

+	}

+	error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL);

+	if (error) {

+#ifdef COMPAT_43

+		/*

+		 * Historically filesystem types were identified by number.

+		 * If we get an integer for the filesystem type instead of a

+		 * string, we check to see if it matches one of the historic

+		 * filesystem types.

+		 */

+		fstypenum = (u_long)SCARG(uap, type);

+		for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next)

+			if (vfsp->vfc_typenum == fstypenum)

+				break;

+		if (vfsp == NULL) {

+			vput(vp);

+			return (ENODEV);

+		}

+		strncpy(fstypename, vfsp->vfc_name, MFSNAMELEN);

+#else

+		vput(vp);

+		return (error);

+#endif

+	}

+	for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) {

+		if (!strcmp(vfsp->vfc_name, fstypename))

+			break;

+	}

+	if (vfsp == NULL) {

+		vput(vp);

+		return (EOPNOTSUPP);

+	}

+	if (vp->v_mountedhere != NULL) {

+		vput(vp);

+		return (EBUSY);

+	}

+	/*

+	 * Allocate and initialize the file system.

+	 */

+	mp = (struct mount *)malloc((u_long)sizeof(struct mount),

+		M_MOUNT, M_WAITOK);

+	bzero((char *)mp, (u_long)sizeof(struct mount));

+	lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0);

+	/* This error never happens, but it makes auditing easier */

+	if ((error = vfs_busy(mp, LK_NOWAIT, 0, p)))

+		return (error);

+	mp->mnt_op = vfsp->vfc_vfsops;

+	mp->mnt_vfc = vfsp;

+	mp->mnt_flag |= (vfsp->vfc_flags & MNT_VISFLAGMASK);

+	strncpy(mp->mnt_stat.f_fstypename, vfsp->vfc_name, MFSNAMELEN);

+	mp->mnt_vnodecovered = vp;

+	mp->mnt_stat.f_owner = p->p_ucred->cr_uid;

+update:

+	/*

+	 * Set the mount level flags.

+	 */

+	if (SCARG(uap, flags) & MNT_RDONLY)

+		mp->mnt_flag |= MNT_RDONLY;

+	else if (mp->mnt_flag & MNT_RDONLY)

+		mp->mnt_flag |= MNT_WANTRDWR;

+	mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |

+	    MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_SOFTDEP |

+	    MNT_NOATIME | MNT_FORCE);

+	mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |

+	    MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC |

+	    MNT_SOFTDEP | MNT_NOATIME | MNT_FORCE);

+	/*

+	 * Mount the filesystem.

+	 */

+	error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);

+	if (!error) {

+		microtime(&tv);

+		mp->mnt_stat.f_ctime = tv.tv_sec;

+	}

+	if (mp->mnt_flag & MNT_UPDATE) {

+		vrele(vp);

+		if (mp->mnt_flag & MNT_WANTRDWR)

+			mp->mnt_flag &= ~MNT_RDONLY;

+		mp->mnt_flag &=~

+		    (MNT_UPDATE | MNT_RELOAD | MNT_FORCE | MNT_WANTRDWR);

+		if (error)

+			mp->mnt_flag = flag;

+ 		if ((mp->mnt_flag & MNT_RDONLY) == 0) {

+ 			if (mp->mnt_syncer == NULL)

+ 				error = vfs_allocate_syncvnode(mp);

+ 		} else {

+ 			if (mp->mnt_syncer != NULL)

+ 				vgone(mp->mnt_syncer);

+ 			mp->mnt_syncer = NULL;

+ 		}

+		vfs_unbusy(mp, p);

+		return (error);

+	}

+	vp->v_mountedhere = mp;

+	/*

+	 * Put the new filesystem on the mount list after root.

+	 */

+	cache_purge(vp);

+	if (!error) {

+		vfsp->vfc_refcount++;

+		simple_lock(&mountlist_slock);

+		TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);

+		simple_unlock(&mountlist_slock);

+		checkdirs(vp);

+		VOP_UNLOCK(vp, 0, p);

+ 		if ((mp->mnt_flag & MNT_RDONLY) == 0)

+ 			error = vfs_allocate_syncvnode(mp);

+		vfs_unbusy(mp, p);

+		(void) VFS_STATFS(mp, &mp->mnt_stat, p);

+		if ((error = VFS_START(mp, 0, p)) != 0)

+			vrele(vp);

+	} else {

+		mp->mnt_vnodecovered->v_mountedhere = (struct mount *)0;

+		vfs_unbusy(mp, p);

+		free((caddr_t)mp, M_MOUNT);

+		vput(vp);

+	}

+	return (error);

+}

+/*

+ * Scan all active processes to see if any of them have a current

+ * or root directory onto which the new filesystem has just been

+ * mounted. If so, replace them with the new mount point.

+ */

+void

+checkdirs(olddp)

+	struct vnode *olddp;

+{

+	struct filedesc *fdp;

+	struct vnode *newdp;

+	struct proc *p;

+	if (olddp->v_usecount == 1)

+		return;

+	if (VFS_ROOT(olddp->v_mountedhere, &newdp))

+		panic("mount: lost mount");

+	for (p = LIST_FIRST(&allproc); p != 0; p = LIST_NEXT(p, p_list)) {

+		fdp = p->p_fd;

+		if (fdp->fd_cdir == olddp) {

+			vrele(fdp->fd_cdir);

+			VREF(newdp);

+			fdp->fd_cdir = newdp;

+		}

+		if (fdp->fd_rdir == olddp) {

+			vrele(fdp->fd_rdir);

+			VREF(newdp);

+			fdp->fd_rdir = newdp;

+		}

+	}

+	if (rootvnode == olddp) {

+		vrele(rootvnode);

+		VREF(newdp);

+		rootvnode = newdp;

+	}

+	vput(newdp);

+}

+/*

+ * Unmount a file system.

+ *

+ * Note: unmount takes a path to the vnode mounted on as argument,

+ * not special file (as before).

+ */

+/* ARGSUSED */

+int

+sys_unmount(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_unmount_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct mount *mp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	mp = vp->v_mount;

+	/*

+	 * Only root, or the user that did the original mount is

+	 * permitted to unmount this filesystem.

+	 */

+	if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) &&

+	    (error = suser(p->p_ucred, &p->p_acflag))) {

+		vput(vp);

+		return (error);

+	}

+	/*

+	 * Don't allow unmounting the root file system.

+	 */

+	if (mp->mnt_flag & MNT_ROOTFS) {

+		vput(vp);

+		return (EINVAL);

+	}

+	/*

+	 * Must be the root of the filesystem

+	 */

+	if ((vp->v_flag & VROOT) == 0) {

+		vput(vp);

+		return (EINVAL);

+	}

+	vput(vp);

+	if (vfs_busy(mp, LK_EXCLUSIVE, NULL, p))

+		return (EBUSY);

+	return (dounmount(mp, SCARG(uap, flags), p, vp));

+}

+/*

+ * Do the actual file system unmount.

+ */

+int

+dounmount(struct mount *mp, int flags, struct proc *p, struct vnode *olddp)

+{

+	struct vnode *coveredvp;

+	struct proc *p2;

+	int error;

+	int hadsyncer = 0;

+ 	mp->mnt_flag &=~ MNT_ASYNC;

+ 	cache_purgevfs(mp);	/* remove cache entries for this file sys */

+ 	if (mp->mnt_syncer != NULL) {

+		hadsyncer = 1;

+ 		vgone(mp->mnt_syncer);

+		mp->mnt_syncer = NULL;

+	}

+	if (((mp->mnt_flag & MNT_RDONLY) ||

+	    (error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p)) == 0) ||

+ 	    (flags & MNT_FORCE))

+ 		error = VFS_UNMOUNT(mp, flags, p);

+	simple_lock(&mountlist_slock);

+ 	if (error) {

+ 		if ((mp->mnt_flag & MNT_RDONLY) == 0 && hadsyncer)

+ 			(void) vfs_allocate_syncvnode(mp);

+		lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK,

+		    &mountlist_slock, p);

+		return (error);

+	}

+	TAILQ_REMOVE(&mountlist, mp, mnt_list);

+	if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) {

+		if (olddp) {

+			/*

+			 * Try to put processes back in a real directory

+			 * after a forced unmount.

+			 * XXX We're not holding a ref on olddp, which may

+			 * change, so compare id numbers.

+			 */

+			LIST_FOREACH(p2, &allproc, p_list) {

+				struct filedesc *fdp = p2->p_fd;

+				if (fdp->fd_cdir &&

+				    fdp->fd_cdir->v_id == olddp->v_id) {

+					vrele(fdp->fd_cdir);

+					vref(coveredvp);

+					fdp->fd_cdir = coveredvp;

+				}

+				if (fdp->fd_rdir &&

+				    fdp->fd_rdir->v_id == olddp->v_id) {

+					vrele(fdp->fd_rdir);

+					vref(coveredvp);

+					fdp->fd_rdir = coveredvp;

+				}

+			}

+		}

+		coveredvp->v_mountedhere = NULL;

+ 		vrele(coveredvp);

+ 	}

+	mp->mnt_vfc->vfc_refcount--;

+	if (mp->mnt_vnodelist.lh_first != NULL)

+		panic("unmount: dangling vnode");

+	lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock, p);

+	free((caddr_t)mp, M_MOUNT);

+	return (0);

+}

+/*

+ * Sync each mounted filesystem.

+ */

+#ifdef DEBUG

+int syncprt = 0;

+struct ctldebug debug0 = { "syncprt", &syncprt };

+#endif

+/* ARGSUSED */

+int

+sys_sync(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct mount *mp, *nmp;

+	int asyncflag;

+	simple_lock(&mountlist_slock);

+	TAILQ_FOREACH_REVERSE_SAFE(mp, &mountlist, mnt_list, nmp) {

+		if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p))

+			continue;

+		if ((mp->mnt_flag & MNT_RDONLY) == 0) {

+			asyncflag = mp->mnt_flag & MNT_ASYNC;

+			mp->mnt_flag &= ~MNT_ASYNC;

+			uvm_vnp_sync(mp);

+			VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p);

+			if (asyncflag)

+				mp->mnt_flag |= MNT_ASYNC;

+		}

+		simple_lock(&mountlist_slock);

+		vfs_unbusy(mp, p);

+	}

+	simple_unlock(&mountlist_slock);

+#ifdef DEBUG

+	if (syncprt)

+		vfs_bufstats();

+#endif /* DEBUG */

+	return (0);

+}

+/*

+ * Change filesystem quotas.

+ */

+/* ARGSUSED */

+int

+sys_quotactl(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_quotactl_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) cmd;

+		syscallarg(int) uid;

+		syscallarg(caddr_t) arg;

+	} */ *uap = v;

+	register struct mount *mp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	mp = nd.ni_vp->v_mount;

+	vrele(nd.ni_vp);

+	return (VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid),

+	    SCARG(uap, arg), p));

+}

+/*

+ * Get filesystem statistics.

+ */

+/* ARGSUSED */

+int

+sys_statfs(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_statfs_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct statfs *) buf;

+	} */ *uap = v;

+	register struct mount *mp;

+	register struct statfs *sp;

+	int error;

+	struct nameidata nd;

+	struct statfs sb;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	mp = nd.ni_vp->v_mount;

+	sp = &mp->mnt_stat;

+	vrele(nd.ni_vp);

+	if ((error = VFS_STATFS(mp, sp, p)) != 0)

+		return (error);

+	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+#if notyet

+	if (mp->mnt_flag & MNT_SOFTDEP)

+		sp->f_eflags = STATFS_SOFTUPD;

+#endif

+	/* Don't let non-root see filesystem id (for NFS security) */

+	if (suser(p->p_ucred, &p->p_acflag)) {

+		bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));

+		sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;

+		sp = &sb;

+	}

+	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

+}

+/*

+ * Get filesystem statistics.

+ */

+/* ARGSUSED */

+int

+sys_fstatfs(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fstatfs_args /* {

+		syscallarg(int) fd;

+		syscallarg(struct statfs *) buf;

+	} */ *uap = v;

+	struct file *fp;

+	struct mount *mp;

+	struct statfs *sp;

+	int error;

+	struct statfs sb;

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	mp = ((struct vnode *)fp->f_data)->v_mount;

+	sp = &mp->mnt_stat;

+	error = VFS_STATFS(mp, sp, p);

+	FRELE(fp);

+	if (error)

+		return (error);

+	sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+#if notyet

+	if (mp->mnt_flag & MNT_SOFTDEP)

+		sp->f_eflags = STATFS_SOFTUPD;

+#endif

+	/* Don't let non-root see filesystem id (for NFS security) */

+	if (suser(p->p_ucred, &p->p_acflag)) {

+		bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));

+		sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;

+		sp = &sb;

+	}

+	return (copyout((caddr_t)sp, (caddr_t)SCARG(uap, buf), sizeof(*sp)));

+}

+/*

+ * Get statistics on all filesystems.

+ */

+int

+sys_getfsstat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_getfsstat_args /* {

+		syscallarg(struct statfs *) buf;

+		syscallarg(size_t) bufsize;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct mount *mp *nmp;

+	register struct statfs *sp;

+	struct statfs sb;

+	caddr_t sfsp;

+	size_t count, maxcount;

+	int error, flags = SCARG(uap, flags);

+	maxcount = SCARG(uap, bufsize) / sizeof(struct statfs);

+	sfsp = (caddr_t)SCARG(uap, buf);

+	count = 0;

+	simple_lock(&mountlist_slock);

+	TAILQ_FOREACH_REVERSE_SAFE(mp, &mountlist, mnt_list, nmp) {

+		if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock, p))

+			continue;

+		if (sfsp && count < maxcount) {

+			sp = &mp->mnt_stat;

+			/* Refresh stats unless MNT_NOWAIT is specified */

+			if (flags != MNT_NOWAIT &&

+			    flags != MNT_LAZY &&

+			    (flags == MNT_WAIT ||

+			    flags == 0) &&

+			    (error = VFS_STATFS(mp, sp, p))) {

+				simple_lock(&mountlist_slock);

+				vfs_unbusy(mp, p);

+ 				continue;

+			}

+			sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+#if notyet

+			if (mp->mnt_flag & MNT_SOFTDEP)

+				sp->f_eflags = STATFS_SOFTUPD;

+#endif

+			if (suser(p->p_ucred, &p->p_acflag)) {

+				bcopy((caddr_t)sp, (caddr_t)&sb, sizeof(sb));

+				sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;

+				sp = &sb;

+			}

+			error = copyout((caddr_t)sp, sfsp, sizeof(*sp));

+			if (error) {

+				vfs_unbusy(mp, p);

+				return (error);

+			}

+			sfsp += sizeof(*sp);

+		}

+		count++;

+		simple_lock(&mountlist_slock);

+		vfs_unbusy(mp, p);

+	}

+	simple_unlock(&mountlist_slock);

+	if (sfsp && count > maxcount)

+		*retval = maxcount;

+	else

+		*retval = count;

+	return (0);

+}

+/*

+ * Change current working directory to a given file descriptor.

+ */

+/* ARGSUSED */

+int

+sys_fchdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fchdir_args /* {

+		syscallarg(int) fd;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct vnode *vp, *tdp;

+	struct mount *mp;

+	struct file *fp;

+	int error;

+	if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VREF(vp);

+	FRELE(fp);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_type != VDIR)

+		error = ENOTDIR;

+	else

+		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

+	while (!error && (mp = vp->v_mountedhere) != NULL) {

+		if (vfs_busy(mp, 0, 0, p))

+			continue;

+		error = VFS_ROOT(mp, &tdp);

+		vfs_unbusy(mp, p);

+		if (error)

+			break;

+		vput(vp);

+		vp = tdp;

+	}

+	if (error) {

+		vput(vp);

+		return (error);

+	}

+	VOP_UNLOCK(vp, 0, p);

+	vrele(fdp->fd_cdir);

+	fdp->fd_cdir = vp;

+	return (0);

+}

+/*

+ * Change current working directory (``.'').

+ */

+/* ARGSUSED */

+int

+sys_chdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_chdir_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct filedesc *fdp = p->p_fd;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = change_dir(&nd, p)) != 0)

+		return (error);

+	vrele(fdp->fd_cdir);

+	fdp->fd_cdir = nd.ni_vp;

+	return (0);

+}

+/*

+ * Change notion of root (``/'') directory.

+ */

+/* ARGSUSED */

+int

+sys_chroot(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_chroot_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct filedesc *fdp = p->p_fd;

+	int error;

+	struct nameidata nd;

+	if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)

+		return (error);

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = change_dir(&nd, p)) != 0)

+		return (error);

+	if (fdp->fd_rdir != NULL) {

+		/*

+		 * A chroot() done inside a changed root environment does

+		 * an automatic chdir to avoid the out-of-tree experience.

+		 */

+		vrele(fdp->fd_rdir);

+		vrele(fdp->fd_cdir);

+		VREF(nd.ni_vp);

+		fdp->fd_cdir = nd.ni_vp;

+	}

+	fdp->fd_rdir = nd.ni_vp;

+	return (0);

+}

+/*

+ * Common routine for chroot and chdir.

+ */

+static int

+change_dir(ndp, p)

+	register struct nameidata *ndp;

+	struct proc *p;

+{

+	struct vnode *vp;

+	int error;

+	if ((error = namei(ndp)) != 0)

+		return (error);

+	vp = ndp->ni_vp;

+	if (vp->v_type != VDIR)

+		error = ENOTDIR;

+	else

+		error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);

+	if (error)

+		vput(vp);

+	else

+		VOP_UNLOCK(vp, 0, p);

+	return (error);

+}

+/*

+ * Check permissions, allocate an open file structure,

+ * and call the device open routine if any.

+ */

+int

+sys_open(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_open_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct file *fp;

+	struct vnode *vp;

+	struct vattr vattr;

+	int flags, cmode;

+	int type, indx, error, localtrunc = 0;

+	struct flock lf;

+	struct nameidata nd;

+	if ((error = falloc(p, &fp, &indx)) != 0)

+		return (error);

+	flags = FFLAGS(SCARG(uap, flags));

+	cmode = ((SCARG(uap, mode) &~ fdp->fd_cmask) & ALLPERMS) &~ S_ISTXT;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	p->p_dupfd = -indx - 1;			/* XXX check for fdopen */

+	if ((flags & O_TRUNC) && (flags & (O_EXLOCK | O_SHLOCK))) {

+		localtrunc = 1;

+		flags &= ~O_TRUNC;	/* Must do truncate ourselves */

+	}

+	if ((error = vn_open(&nd, flags, cmode)) != 0) {

+		if ((error == ENODEV || error == ENXIO) &&

+		    p->p_dupfd >= 0 &&			/* XXX from fdopen */

+		    (error =

+			dupfdopen(fdp, indx, p->p_dupfd, flags, error)) == 0) {

+			closef(fp, p);

+			*retval = indx;

+			return (0);

+		}

+		if (error == ERESTART)

+			error = EINTR;

+		fdremove(fdp, indx);

+		closef(fp, p);

+		return (error);

+	}

+	p->p_dupfd = 0;

+	vp = nd.ni_vp;

+	fp->f_flag = flags & FMASK;

+	fp->f_type = DTYPE_VNODE;

+	fp->f_ops = &vnops;

+	fp->f_data = (caddr_t)vp;

+	if (flags & (O_EXLOCK | O_SHLOCK)) {

+		lf.l_whence = SEEK_SET;

+		lf.l_start = 0;

+		lf.l_len = 0;

+		if (flags & O_EXLOCK)

+			lf.l_type = F_WRLCK;

+		else

+			lf.l_type = F_RDLCK;

+		type = F_FLOCK;

+		if ((flags & FNONBLOCK) == 0)

+			type |= F_WAIT;

+		VOP_UNLOCK(vp, 0, p);

+		error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);

+		if (error) {

+			/* closef will vn_close the file for us. */

+			fdremove(fdp, indx);

+			closef(fp, p);

+			return (error);

+		}

+		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+		fp->f_flag |= FHASLOCK;

+	}

+	if (localtrunc) {

+		VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+		if ((fp->f_flag & FWRITE) == 0)

+			error = EACCES;

+		else if (vp->v_mount->mnt_flag & MNT_RDONLY)

+			error = EROFS;

+		else if (vp->v_type == VDIR)

+			error = EISDIR;

+		else if ((error = vn_writechk(vp)) == 0) {

+			VATTR_NULL(&vattr);

+			vattr.va_size = 0;

+			error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);

+		}

+		if (error) {

+			VOP_UNLOCK(vp, 0, p);

+			/* closef will close the file for us. */

+			fdremove(fdp, indx);

+			closef(fp, p);

+			return (error);

+		}

+	}

+	VOP_UNLOCK(vp, 0, p);

+	*retval = indx;

+	FILE_SET_MATURE(fp);

+	return (0);

+}

+/*

+ * Get file handle system call

+ */

+int

+sys_getfh(p, v, retval)

+	struct proc *p;

+	register void *v;

+	register_t *retval;

+{

+	register struct sys_getfh_args /* {

+		syscallarg(char *) fname;

+		syscallarg(fhandle_t *) fhp;

+	} */ *uap = v;

+	register struct vnode *vp;

+	fhandle_t fh;

+	int error;

+	struct nameidata nd;

+	/*

+	 * Must be super user

+	 */

+	error = suser(p->p_ucred, &p->p_acflag);

+	if (error)

+		return (error);

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, fname), p);

+	error = namei(&nd);

+	if (error)

+		return (error);

+	vp = nd.ni_vp;

+	bzero((caddr_t)&fh, sizeof(fh));

+	fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;

+	error = VFS_VPTOFH(vp, &fh.fh_fid);

+	vput(vp);

+	if (error)

+		return (error);

+	error = copyout((caddr_t)&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh));

+	return (error);

+}

+/*

+ * Open a file given a file handle.

+ *

+ * Check permissions, allocate an open file structure,

+ * and call the device open routine if any.

+ */

+int

+sys_fhopen(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fhopen_args /* {

+		syscallarg(const fhandle_t *) fhp;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct file *fp;

+	struct vnode *vp = NULL;

+	struct mount *mp;

+	struct ucred *cred = p->p_ucred;

+	int flags;

+	int type, indx, error=0;

+	struct flock lf;

+	struct vattr va;

+	fhandle_t fh;

+	/*

+	 * Must be super user

+	 */

+	if ((error = suser(p->p_ucred, &p->p_acflag)))

+		return (error);

+	flags = FFLAGS(SCARG(uap, flags));

+	if ((flags & (FREAD | FWRITE)) == 0)

+		return (EINVAL);

+	if ((flags & O_CREAT))

+		return (EINVAL);

+	if ((error = falloc(p, &fp, &indx)) != 0)

+		return (error);

+	if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)

+		goto bad;

+	if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) {

+		error = ESTALE;

+		goto bad;

+	}

+	if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) {

+		vp = NULL;	/* most likely unnecessary sanity for bad: */

+		goto bad;

+	}

+	/* Now do an effective vn_open */

+	if (vp->v_type == VSOCK) {

+		error = EOPNOTSUPP;

+		goto bad;

+	}

+	if (flags & FREAD) {

+		if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0)

+			goto bad;

+	}

+	if (flags & (FWRITE | O_TRUNC)) {

+		if (vp->v_type == VDIR) {

+			error = EISDIR;

+			goto bad;

+		}

+		if ((error = vn_writechk(vp)) != 0 ||

+		    (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0)

+			goto bad;

+	}

+	if (flags & O_TRUNC) {

+		VOP_UNLOCK(vp, 0, p);				/* XXX */

+		VOP_LEASE(vp, p, cred, LEASE_WRITE);

+		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);	/* XXX */

+		VATTR_NULL(&va);

+		va.va_size = 0;

+		if ((error = VOP_SETATTR(vp, &va, cred, p)) != 0)

+			goto bad;

+	}

+	if ((error = VOP_OPEN(vp, flags, cred, p)) != 0)

+		goto bad;

+	if (flags & FWRITE)

+		vp->v_writecount++;

+	/* done with modified vn_open, now finish what sys_open does. */

+	fp->f_flag = flags & FMASK;

+	fp->f_type = DTYPE_VNODE;

+	fp->f_ops = &vnops;

+	fp->f_data = (caddr_t)vp;

+	if (flags & (O_EXLOCK | O_SHLOCK)) {

+		lf.l_whence = SEEK_SET;

+		lf.l_start = 0;

+		lf.l_len = 0;

+		if (flags & O_EXLOCK)

+			lf.l_type = F_WRLCK;

+		else

+			lf.l_type = F_RDLCK;

+		type = F_FLOCK;

+		if ((flags & FNONBLOCK) == 0)

+			type |= F_WAIT;

+		VOP_UNLOCK(vp, 0, p);

+		error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type);

+		if (error) {

+			/* closef will vn_close the file for us. */

+			fdremove(fdp, indx);

+			closef(fp, p);

+			return (error);

+		}

+		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+		fp->f_flag |= FHASLOCK;

+	}

+	VOP_UNLOCK(vp, 0, p);

+	*retval = indx;

+	FILE_SET_MATURE(fp);

+	return (0);

+bad:

+	fdremove(fdp, indx);

+	closef(fp, p);

+	if (vp != NULL)

+		vput(vp);

+	return (error);

+}

+/* ARGSUSED */

+int

+sys_fhstat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fhstat_args /* {

+		syscallarg(const fhandle_t *) fhp;

+		syscallarg(struct stat *) sb;

+	} */ *uap = v;

+	struct stat sb;

+	int error;

+	fhandle_t fh;

+	struct mount *mp;

+	struct vnode *vp;

+	/*

+	 * Must be super user

+	 */

+	if ((error = suser(p->p_ucred, &p->p_acflag)))

+		return (error);

+	if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)

+		return (error);

+	if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)

+		return (ESTALE);

+	if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))

+		return (error);

+	error = vn_stat(vp, &sb, p);

+	vput(vp);

+	if (error)

+		return (error);

+	error = copyout(&sb, SCARG(uap, sb), sizeof(sb));

+	return (error);

+}

+/* ARGSUSED */

+int

+sys_fhstatfs(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_fhstatfs_args /*

+		syscallarg(const fhandle_t *) fhp;

+		syscallarg(struct statfs *) buf;

+	} */ *uap = v;

+	struct statfs sp;

+	fhandle_t fh;

+	struct mount *mp;

+	struct vnode *vp;

+	int error;

+	/*

+	 * Must be super user

+	 */

+	if ((error = suser(p->p_ucred, &p->p_acflag)))

+		return (error);

+	if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)

+		return (error);

+	if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)

+		return (ESTALE);

+	if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))

+		return (error);

+	mp = vp->v_mount;

+	vput(vp);

+	if ((error = VFS_STATFS(mp, &sp, p)) != 0)

+		return (error);

+	sp.f_flags = mp->mnt_flag & MNT_VISFLAGMASK;

+	return (copyout(&sp, SCARG(uap, buf), sizeof(sp)));

+}

+/*

+ * Create a special file.

+ */

+/* ARGSUSED */

+int

+sys_mknod(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mknod_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+		syscallarg(int) dev;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	int whiteout = 0;

+	struct nameidata nd;

+	if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)

+		return (error);

+	if (p->p_fd->fd_rdir)

+		return (EINVAL);

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	if (vp != NULL)

+		error = EEXIST;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

+		vattr.va_rdev = SCARG(uap, dev);

+		whiteout = 0;

+		switch (SCARG(uap, mode) & S_IFMT) {

+		case S_IFMT:	/* used by badsect to flag bad sectors */

+			vattr.va_type = VBAD;

+			break;

+		case S_IFCHR:

+			vattr.va_type = VCHR;

+			break;

+		case S_IFBLK:

+			vattr.va_type = VBLK;

+			break;

+		case S_IFWHT:

+			whiteout = 1;

+			break;

+		default:

+			error = EINVAL;

+			break;

+		}

+	}

+	if (!error) {

+		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		if (whiteout) {

+			error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE);

+			if (error)

+				VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+			vput(nd.ni_dvp);

+		} else {

+			error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp,

+						&nd.ni_cnd, &vattr);

+		}

+	} else {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		if (vp)

+			vrele(vp);

+	}

+	return (error);

+}

+/*

+ * Create a named pipe.

+ */

+/* ARGSUSED */

+int

+sys_mkfifo(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+#ifndef FIFO

+	return (EOPNOTSUPP);

+#else

+	register struct sys_mkfifo_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	if (nd.ni_vp != NULL) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(nd.ni_vp);

+		return (EEXIST);

+	}

+	VATTR_NULL(&vattr);

+	vattr.va_type = VFIFO;

+	vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_fd->fd_cmask;

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	return (VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr));

+#endif /* FIFO */

+}

+/*

+ * Make a hard file link.

+ */

+/* ARGSUSED */

+int

+sys_link(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_link_args /* {

+		syscallarg(char *) path;

+		syscallarg(char *) link;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct nameidata nd;

+	int error;

+	int flags;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	flags = LOCKPARENT;

+	if (vp->v_type == VDIR) {

+		flags |= STRIPSLASHES;

+	}

+	NDINIT(&nd, CREATE, flags, UIO_USERSPACE, SCARG(uap, link), p);

+	if ((error = namei(&nd)) != 0)

+		goto out;

+	if (nd.ni_vp) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(nd.ni_vp);

+		error = EEXIST;

+		goto out;

+	}

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd);

+out:

+	vrele(vp);

+	return (error);

+}

+/*

+ * Make a symbolic link.

+ */

+/* ARGSUSED */

+int

+sys_symlink(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_symlink_args /* {

+		syscallarg(char *) path;

+		syscallarg(char *) link;

+	} */ *uap = v;

+	struct vattr vattr;

+	char *path;

+	int error;

+	struct nameidata nd;

+	MALLOC(path, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);

+	error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL);

+	if (error)

+		goto out;

+	NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p);

+	if ((error = namei(&nd)) != 0)

+		goto out;

+	if (nd.ni_vp) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(nd.ni_vp);

+		error = EEXIST;

+		goto out;

+	}

+	VATTR_NULL(&vattr);

+	vattr.va_mode = ACCESSPERMS &~ p->p_fd->fd_cmask;

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path);

+out:

+	FREE(path, M_NAMEI);

+	return (error);

+}

+/*

+ * Delete a whiteout from the filesystem.

+ */

+/* ARGSUSED */

+int

+sys_undelete(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_undelete_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	error = namei(&nd);

+	if (error)

+		return (error);

+	if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == nd.ni_vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		if (nd.ni_vp)

+			vrele(nd.ni_vp);

+		return (EEXIST);

+	}

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0)

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+	vput(nd.ni_dvp);

+	return (error);

+}

+/*

+ * Delete a name from the filesystem.

+ */

+/* ARGSUSED */

+int

+sys_unlink(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_unlink_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct vnode *vp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	/*

+	 * The root of a mounted filesystem cannot be deleted.

+	 */

+	if (vp->v_flag & VROOT) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vput(vp);

+		error = EBUSY;

+		goto out;

+	}

+	(void)uvm_vnp_uncache(vp);

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

+out:

+	return (error);

+}

+/*

+ * Reposition read/write file offset.

+ */

+int

+sys_lseek(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_lseek_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) pad;

+		syscallarg(off_t) offset;

+		syscallarg(int) whence;

+	} */ *uap = v;

+	struct ucred *cred = p->p_ucred;

+	register struct filedesc *fdp = p->p_fd;

+	register struct file *fp;

+	struct vattr vattr;

+	struct vnode *vp;

+	int error, special;

+	if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)

+		return (EBADF);

+	if (fp->f_type != DTYPE_VNODE)

+		return (ESPIPE);

+	vp = (struct vnode *)fp->f_data;

+	if (vp->v_type == VFIFO)

+		return (ESPIPE);

+	if (vp->v_type == VCHR)

+		special = 1;

+	else

+		special = 0;

+	switch (SCARG(uap, whence)) {

+	case SEEK_CUR:

+		if (!special && fp->f_offset + SCARG(uap, offset) < 0)

+			return (EINVAL);

+		fp->f_offset += SCARG(uap, offset);

+		break;

+	case SEEK_END:

+		error = VOP_GETATTR((struct vnode *)fp->f_data, &vattr,

+				    cred, p);

+		if (error)

+			return (error);

+		if (!special && (off_t)vattr.va_size + SCARG(uap, offset) < 0)

+			return (EINVAL);

+		fp->f_offset = SCARG(uap, offset) + vattr.va_size;

+		break;

+	case SEEK_SET:

+		if (!special && SCARG(uap, offset) < 0)

+			return (EINVAL);

+		fp->f_offset = SCARG(uap, offset);

+		break;

+	default:

+		return (EINVAL);

+	}

+	*(off_t *)retval = fp->f_offset;

+	return (0);

+}

+/*

+ * Check access permissions.

+ */

+int

+sys_access(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_access_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) flags;

+	} */ *uap = v;

+	register struct ucred *cred = p->p_ucred;

+	register struct vnode *vp;

+	int error, flags, t_gid, t_uid;

+	struct nameidata nd;

+	if (SCARG(uap, flags) & ~(R_OK | W_OK | X_OK))

+		return (EINVAL);

+	t_uid = cred->cr_uid;

+	t_gid = cred->cr_gid;

+	cred->cr_uid = p->p_cred->p_ruid;

+	cred->cr_gid = p->p_cred->p_rgid;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		goto out1;

+	vp = nd.ni_vp;

+	/* Flags == 0 means only check for existence. */

+	if (SCARG(uap, flags)) {

+		flags = 0;

+		if (SCARG(uap, flags) & R_OK)

+			flags |= VREAD;

+		if (SCARG(uap, flags) & W_OK)

+			flags |= VWRITE;

+		if (SCARG(uap, flags) & X_OK)

+			flags |= VEXEC;

+		if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)

+			error = VOP_ACCESS(vp, flags, cred, p);

+	}

+	vput(vp);

+out1:

+	cred->cr_uid = t_uid;

+	cred->cr_gid = t_gid;

+	return (error);

+}

+/*

+ * Get file status; this version follows links.

+ */

+/* ARGSUSED */

+int

+sys_stat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_stat_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct stat *) ub;

+	} */ *uap = v;

+	struct stat sb;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	error = vn_stat(nd.ni_vp, &sb, p);

+	vput(nd.ni_vp);

+	if (error)

+		return (error);

+	/* Don't let non-root see generation numbers (for NFS security) */

+	if (suser(p->p_ucred, &p->p_acflag))

+		sb.st_gen = 0;

+	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

+	return (error);

+}

+/*

+ * Get file status; this version does not follow links.

+ */

+/* ARGSUSED */

+int

+sys_lstat(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_lstat_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct stat *) ub;

+	} */ *uap = v;

+	struct stat sb;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	error = vn_stat(nd.ni_vp, &sb, p);

+	vput(nd.ni_vp);

+	if (error)

+		return (error);

+	/* Don't let non-root see generation numbers (for NFS security) */

+	if (suser(p->p_ucred, &p->p_acflag))

+		sb.st_gen = 0;

+	error = copyout((caddr_t)&sb, (caddr_t)SCARG(uap, ub), sizeof (sb));

+	return (error);

+}

+/*

+ * Get configurable pathname variables.

+ */

+/* ARGSUSED */

+int

+sys_pathconf(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_pathconf_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) name;

+	} */ *uap = v;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval);

+	vput(nd.ni_vp);

+	return (error);

+}

+/*

+ * Return target name of a symbolic link.

+ */

+/* ARGSUSED */

+int

+sys_readlink(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_readlink_args /* {

+		syscallarg(char *) path;

+		syscallarg(char *) buf;

+		syscallarg(size_t) count;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct iovec aiov;

+	struct uio auio;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	if (vp->v_type != VLNK)

+		error = EINVAL;

+	else {

+		aiov.iov_base = SCARG(uap, buf);

+		aiov.iov_len = SCARG(uap, count);

+		auio.uio_iov = &aiov;

+		auio.uio_iovcnt = 1;

+		auio.uio_offset = 0;

+		auio.uio_rw = UIO_READ;

+		auio.uio_segflg = UIO_USERSPACE;

+		auio.uio_procp = p;

+		auio.uio_resid = SCARG(uap, count);

+		error = VOP_READLINK(vp, &auio, p->p_ucred);

+	}

+	vput(vp);

+	*retval = SCARG(uap, count) - auio.uio_resid;

+	return (error);

+}

+/*

+ * Change flags of a file given a path name.

+ */

+/* ARGSUSED */

+int

+sys_chflags(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_chflags_args /* {

+		syscallarg(char *) path;

+		syscallarg(unsigned int) flags;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else if (SCARG(uap, flags) == VNOVAL)

+		error = EINVAL;

+	else {

+		if (suser(p->p_ucred, &p->p_acflag)) {

+			if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)

+				goto out;

+			if (vattr.va_type == VCHR || vattr.va_type == VBLK) {

+				error = EINVAL;

+				goto out;

+			}

+		}

+		VATTR_NULL(&vattr);

+		vattr.va_flags = SCARG(uap, flags);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+out:

+	vput(vp);

+	return (error);

+}

+/*

+ * Change flags of a file given a file descriptor.

+ */

+/* ARGSUSED */

+int

+sys_fchflags(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fchflags_args /* {

+		syscallarg(int) fd;

+		syscallarg(unsigned int) flags;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else if (SCARG(uap, flags) == VNOVAL)

+		error = EINVAL;

+	else {

+		if (suser(p->p_ucred, &p->p_acflag)) {

+			if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))

+			    != 0)

+				goto out;

+			if (vattr.va_type == VCHR || vattr.va_type == VBLK) {

+				error = EINVAL;

+				goto out;

+			}

+		}

+		VATTR_NULL(&vattr);

+		vattr.va_flags = SCARG(uap, flags);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+out:

+	VOP_UNLOCK(vp, 0, p);

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Change mode of a file given path name.

+ */

+/* ARGSUSED */

+int

+sys_chmod(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_chmod_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	if (SCARG(uap, mode) & ~(S_IFMT | ALLPERMS))

+		return (EINVAL);

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Change mode of a file given a file descriptor.

+ */

+/* ARGSUSED */

+int

+sys_fchmod(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fchmod_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if (SCARG(uap, mode) & ~(S_IFMT | ALLPERMS))

+		return (EINVAL);

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		VATTR_NULL(&vattr);

+		vattr.va_mode = SCARG(uap, mode) & ALLPERMS;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	VOP_UNLOCK(vp, 0, p);

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Set ownership given a path name.

+ */

+/* ARGSUSED */

+int

+sys_chown(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_chown_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) uid;

+		syscallarg(int) gid;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	u_short mode;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		if ((SCARG(uap, uid) != -1 || SCARG(uap, gid) != -1) &&

+		    (suser(p->p_ucred, &p->p_acflag) || suid_clear)) {

+			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);

+			if (error)

+				goto out;

+			mode = vattr.va_mode & ~(VSUID | VSGID);

+			if (mode == vattr.va_mode)

+				mode = VNOVAL;

+		}

+		else

+			mode = VNOVAL;

+		VATTR_NULL(&vattr);

+		vattr.va_uid = SCARG(uap, uid);

+		vattr.va_gid = SCARG(uap, gid);

+		vattr.va_mode = mode;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+out:

+	vput(vp);

+	return (error);

+}

+/*

+ * Set ownership given a path name, without following links.

+ */

+/* ARGSUSED */

+int

+sys_lchown(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_lchown_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) uid;

+		syscallarg(int) gid;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	u_short mode;

+	NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		if ((SCARG(uap, uid) != -1 || SCARG(uap, gid) != -1) &&

+		    (suser(p->p_ucred, &p->p_acflag) || suid_clear)) {

+			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);

+			if (error)

+				goto out;

+			mode = vattr.va_mode & ~(VSUID | VSGID);

+			if (mode == vattr.va_mode)

+				mode = VNOVAL;

+		}

+		else

+			mode = VNOVAL;

+		VATTR_NULL(&vattr);

+		vattr.va_uid = SCARG(uap, uid);

+		vattr.va_gid = SCARG(uap, gid);

+		vattr.va_mode = mode;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+out:

+	vput(vp);

+	return (error);

+}

+/*

+ * Set ownership given a file descriptor.

+ */

+/* ARGSUSED */

+int

+sys_fchown(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fchown_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) uid;

+		syscallarg(int) gid;

+	} */ *uap = v;

+	struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct file *fp;

+	u_short mode;

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		if ((SCARG(uap, uid) != -1 || SCARG(uap, gid) != -1) &&

+		    (suser(p->p_ucred, &p->p_acflag) || suid_clear)) {

+			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);

+			if (error)

+				goto out;

+			mode = vattr.va_mode & ~(VSUID | VSGID);

+			if (mode == vattr.va_mode)

+				mode = VNOVAL;

+		} else

+			mode = VNOVAL;

+		VATTR_NULL(&vattr);

+		vattr.va_uid = SCARG(uap, uid);

+		vattr.va_gid = SCARG(uap, gid);

+		vattr.va_mode = mode;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+out:

+	VOP_UNLOCK(vp, 0, p);

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Set the access and modification times given a path name.

+ */

+/* ARGSUSED */

+int

+sys_utimes(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_utimes_args /* {

+		syscallarg(char *) path;

+		syscallarg(struct timeval *) tptr;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct timeval tv[2];

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	VATTR_NULL(&vattr);

+	if (SCARG(uap, tptr) == NULL) {

+		microtime(&tv[0]);

+		tv[1] = tv[0];

+		vattr.va_vaflags |= VA_UTIMES_NULL;

+	} else {

+		error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,

+		    sizeof (tv));

+		if (error)

+			return (error);

+		/* XXX workaround timeval matching the VFS constant VNOVAL */

+		if (tv[0].tv_sec == VNOVAL)

+			tv[0].tv_sec = VNOVAL - 1;

+		if (tv[1].tv_sec == VNOVAL)

+			tv[1].tv_sec = VNOVAL - 1;

+	}

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		vattr.va_atime.tv_sec = tv[0].tv_sec;

+		vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;

+		vattr.va_mtime.tv_sec = tv[1].tv_sec;

+		vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Set the access and modification times given a file descriptor.

+ */

+/* ARGSUSED */

+int

+sys_futimes(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_futimes_args /* {

+		syscallarg(int) fd;

+		syscallarg(struct timeval *) tptr;

+	} */ *uap = v;

+	struct vnode *vp;

+	struct timeval tv[2];

+	struct vattr vattr;

+	int error;

+	struct file *fp;

+	VATTR_NULL(&vattr);

+	if (SCARG(uap, tptr) == NULL) {

+		microtime(&tv[0]);

+		tv[1] = tv[0];

+		vattr.va_vaflags |= VA_UTIMES_NULL;

+	} else {

+		error = copyin((caddr_t)SCARG(uap, tptr), (caddr_t)tv,

+		    sizeof (tv));

+		if (error)

+			return (error);

+		/* XXX workaround timeval matching the VFS constant VNOVAL */

+		if (tv[0].tv_sec == VNOVAL)

+			tv[0].tv_sec = VNOVAL - 1;

+		if (tv[1].tv_sec == VNOVAL)

+			tv[1].tv_sec = VNOVAL - 1;

+	}

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_mount->mnt_flag & MNT_RDONLY)

+		error = EROFS;

+	else {

+		vattr.va_atime.tv_sec = tv[0].tv_sec;

+		vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000;

+		vattr.va_mtime.tv_sec = tv[1].tv_sec;

+		vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000;

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	VOP_UNLOCK(vp, 0, p);

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Truncate a file given its path name.

+ */

+/* ARGSUSED */

+int

+sys_truncate(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_truncate_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) pad;

+		syscallarg(off_t) length;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_type == VDIR)

+		error = EISDIR;

+	else if ((error = vn_writechk(vp)) == 0 &&

+	    (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) {

+		VATTR_NULL(&vattr);

+		vattr.va_size = SCARG(uap, length);

+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);

+	}

+	vput(vp);

+	return (error);

+}

+/*

+ * Truncate a file given a file descriptor.

+ */

+/* ARGSUSED */

+int

+sys_ftruncate(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_ftruncate_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) pad;

+		syscallarg(off_t) length;

+	} */ *uap = v;

+	struct vattr vattr;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	if ((fp->f_flag & FWRITE) == 0) {

+		error = EINVAL;

+		goto bad;

+	}

+	vp = (struct vnode *)fp->f_data;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	if (vp->v_type == VDIR)

+		error = EISDIR;

+	else if ((error = vn_writechk(vp)) == 0) {

+		VATTR_NULL(&vattr);

+		vattr.va_size = SCARG(uap, length);

+		error = VOP_SETATTR(vp, &vattr, fp->f_cred, p);

+	}

+	VOP_UNLOCK(vp, 0, p);

+bad:

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Sync an open file.

+ */

+/* ARGSUSED */

+int

+sys_fsync(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_fsync_args /* {

+		syscallarg(int) fd;

+	} */ *uap = v;

+	struct vnode *vp;

+	struct file *fp;

+	int error;

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	vp = (struct vnode *)fp->f_data;

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	error = VOP_FSYNC(vp, fp->f_cred, MNT_WAIT, p);

+#ifdef FFS_SOFTUPDATES

+	if (error == 0 && vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP))

+		error = softdep_fsync(vp);

+#endif

+	VOP_UNLOCK(vp, 0, p);

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Rename files.  Source and destination must either both be directories,

+ * or both not be directories.  If target is a directory, it must be empty.

+ */

+/* ARGSUSED */

+int

+sys_rename(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_rename_args /* {

+		syscallarg(char *) from;

+		syscallarg(char *) to;

+	} */ *uap = v;

+	register struct vnode *tvp, *fvp, *tdvp;

+	struct nameidata fromnd, tond;

+	int error;

+	int flags;

+	NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE,

+	    SCARG(uap, from), p);

+	if ((error = namei(&fromnd)) != 0)

+		return (error);

+	fvp = fromnd.ni_vp;

+	flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART;

+	/*

+	 * rename("foo/", "bar/");  is  OK

+	 */

+	if (fvp->v_type == VDIR)

+		flags |= STRIPSLASHES;

+	NDINIT(&tond, RENAME, flags,

+	    UIO_USERSPACE, SCARG(uap, to), p);

+	if ((error = namei(&tond)) != 0) {

+		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

+		vrele(fromnd.ni_dvp);

+		vrele(fvp);

+		goto out1;

+	}

+	tdvp = tond.ni_dvp;

+	tvp = tond.ni_vp;

+	if (tvp != NULL) {

+		if (fvp->v_type == VDIR && tvp->v_type != VDIR) {

+			error = ENOTDIR;

+			goto out;

+		} else if (fvp->v_type != VDIR && tvp->v_type == VDIR) {

+			error = EISDIR;

+			goto out;

+		}

+	}

+	if (fvp == tdvp)

+		error = EINVAL;

+	/*

+	 * If source is the same as the destination (that is the

+	 * same inode number)

+	 */

+	if (fvp == tvp)

+		error = -1;

+out:

+	if (!error) {

+		VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE);

+		if (fromnd.ni_dvp != tdvp)

+			VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		if (tvp) {

+			(void)uvm_vnp_uncache(tvp);

+			VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE);

+		}

+		error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd,

+				   tond.ni_dvp, tond.ni_vp, &tond.ni_cnd);

+	} else {

+		VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd);

+		if (tdvp == tvp)

+			vrele(tdvp);

+		else

+			vput(tdvp);

+		if (tvp)

+			vput(tvp);

+		VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd);

+		vrele(fromnd.ni_dvp);

+		vrele(fvp);

+	}

+	vrele(tond.ni_startdir);

+	FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI);

+out1:

+	if (fromnd.ni_startdir)

+		vrele(fromnd.ni_startdir);

+	FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI);

+	if (error == -1)

+		return (0);

+	return (error);

+}

+/*

+ * Make a directory file.

+ */

+/* ARGSUSED */

+int

+sys_mkdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_mkdir_args /* {

+		syscallarg(char *) path;

+		syscallarg(int) mode;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, CREATE, LOCKPARENT | STRIPSLASHES,

+	    UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	if (vp != NULL) {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vrele(vp);

+		return (EEXIST);

+	}

+	VATTR_NULL(&vattr);

+	vattr.va_type = VDIR;

+	vattr.va_mode = (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_fd->fd_cmask;

+	VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+	error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);

+	if (!error)

+		vput(nd.ni_vp);

+	return (error);

+}

+/*

+ * Remove a directory file.

+ */

+/* ARGSUSED */

+int

+sys_rmdir(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_rmdir_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct vnode *vp;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE,

+	    SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	if (vp->v_type != VDIR) {

+		error = ENOTDIR;

+		goto out;

+	}

+	/*

+	 * No rmdir "." please.

+	 */

+	if (nd.ni_dvp == vp) {

+		error = EBUSY;

+		goto out;

+	}

+	/*

+	 * The root of a mounted filesystem cannot be deleted.

+	 */

+	if (vp->v_flag & VROOT)

+		error = EBUSY;

+out:

+	if (!error) {

+		VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE);

+		VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+		error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);

+	} else {

+		VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);

+		if (nd.ni_dvp == vp)

+			vrele(nd.ni_dvp);

+		else

+			vput(nd.ni_dvp);

+		vput(vp);

+	}

+	return (error);

+}

+/*

+ * Read a block of directory entries in a file system independent format.

+ */

+int

+sys_getdirentries(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_getdirentries_args /* {

+		syscallarg(int) fd;

+		syscallarg(char *) buf;

+		syscallarg(int) count;

+		syscallarg(long *) basep;

+	} */ *uap = v;

+	struct vnode *vp;

+	struct file *fp;

+	struct uio auio;

+	struct iovec aiov;

+	long loff;

+	int error, eofflag;

+	if (SCARG(uap, count) < 0)

+		return EINVAL;

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	if ((fp->f_flag & FREAD) == 0) {

+		error = EBADF;

+		goto bad;

+	}

+	vp = (struct vnode *)fp->f_data;

+unionread:

+	if (vp->v_type != VDIR) {

+		error = EINVAL;

+		goto bad;

+	}

+	aiov.iov_base = SCARG(uap, buf);

+	aiov.iov_len = SCARG(uap, count);

+	auio.uio_iov = &aiov;

+	auio.uio_iovcnt = 1;

+	auio.uio_rw = UIO_READ;

+	auio.uio_segflg = UIO_USERSPACE;

+	auio.uio_procp = p;

+	auio.uio_resid = SCARG(uap, count);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	loff = auio.uio_offset = fp->f_offset;

+	error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, 0, 0);

+	fp->f_offset = auio.uio_offset;

+	VOP_UNLOCK(vp, 0, p);

+	if (error)

+		goto bad;

+	if ((SCARG(uap, count) == auio.uio_resid) &&

+	    union_check_p &&

+	    (union_check_p(p, &vp, fp, auio, &error) != 0))

+		goto unionread;

+	if (error)

+		goto bad;

+	if ((SCARG(uap, count) == auio.uio_resid) &&

+	    (vp->v_flag & VROOT) &&

+	    (vp->v_mount->mnt_flag & MNT_UNION)) {

+		struct vnode *tvp = vp;

+		vp = vp->v_mount->mnt_vnodecovered;

+		VREF(vp);

+		fp->f_data = (caddr_t) vp;

+		fp->f_offset = 0;

+		vrele(tvp);

+		goto unionread;

+	}

+	error = copyout((caddr_t)&loff, (caddr_t)SCARG(uap, basep),

+	    sizeof(long));

+	*retval = SCARG(uap, count) - auio.uio_resid;

+bad:

+	FRELE(fp);

+	return (error);

+}

+/*

+ * Set the mode mask for creation of filesystem nodes.

+ */

+int

+sys_umask(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_umask_args /* {

+		syscallarg(int) newmask;

+	} */ *uap = v;

+	register struct filedesc *fdp;

+	fdp = p->p_fd;

+	*retval = fdp->fd_cmask;

+	fdp->fd_cmask = SCARG(uap, newmask) & ACCESSPERMS;

+	return (0);

+}

+/*

+ * Void all references to file by ripping underlying filesystem

+ * away from vnode.

+ */

+/* ARGSUSED */

+int

+sys_revoke(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	register struct sys_revoke_args /* {

+		syscallarg(char *) path;

+	} */ *uap = v;

+	register struct vnode *vp;

+	struct vattr vattr;

+	int error;

+	struct nameidata nd;

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	vp = nd.ni_vp;

+	if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)

+		goto out;

+	if (p->p_ucred->cr_uid != vattr.va_uid &&

+	    (error = suser(p->p_ucred, &p->p_acflag)))

+		goto out;

+	if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER)))

+		VOP_REVOKE(vp, REVOKEALL);

+out:

+	vrele(vp);

+	return (error);

+}

+/*

+ * Convert a user file descriptor to a kernel file entry.

+ *

+ * On return *fpp is FREF:ed.

+ */

+int

+getvnode(fdp, fd, fpp)

+	struct filedesc *fdp;

+	struct file **fpp;

+	int fd;

+{

+	struct file *fp;

+	if ((fp = fd_getfile(fdp, fd)) == NULL)

+		return (EBADF);

+	if (fp->f_type != DTYPE_VNODE)

+		return (EINVAL);

+	FREF(fp);

+	*fpp = fp;

+	return (0);

+}

+/*

+ * Positional read system call.

+ */

+int

+sys_pread(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_pread_args /* {

+		syscallarg(int) fd;

+		syscallarg(void *) buf;

+		syscallarg(size_t) nbyte;

+		syscallarg(int) pad;

+		syscallarg(off_t) offset;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct file *fp;

+	struct vnode *vp;

+	off_t offset;

+	int fd = SCARG(uap, fd);

+	if ((fp = fd_getfile(fdp, fd)) == NULL)

+		return (EBADF);

+	if ((fp->f_flag & FREAD) == 0)

+		return (EBADF);

+	vp = (struct vnode *)fp->f_data;

+	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

+		return (ESPIPE);

+	}

+	offset = SCARG(uap, offset);

+	FREF(fp);

+	/* dofileread() will FRELE the descriptor for us */

+	return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),

+	    &offset, retval));

+}

+/*

+ * Positional scatter read system call.

+ */

+int

+sys_preadv(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_preadv_args /* {

+		syscallarg(int) fd;

+		syscallarg(const struct iovec *) iovp;

+		syscallarg(int) iovcnt;

+		syscallarg(int) pad;

+		syscallarg(off_t) offset;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct file *fp;

+	struct vnode *vp;

+	off_t offset;

+	int fd = SCARG(uap, fd);

+	if ((fp = fd_getfile(fdp, fd)) == NULL)

+		return (EBADF);

+	if ((fp->f_flag & FREAD) == 0)

+		return (EBADF);

+	vp = (struct vnode *)fp->f_data;

+	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

+		return (ESPIPE);

+	}

+	FREF(fp);

+	offset = SCARG(uap, offset);

+	/* dofilereadv() will FRELE the descriptor for us */

+	return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),

+	    &offset, retval));

+}

+/*

+ * Positional write system call.

+ */

+int

+sys_pwrite(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_pwrite_args /* {

+		syscallarg(int) fd;

+		syscallarg(const void *) buf;

+		syscallarg(size_t) nbyte;

+		syscallarg(int) pad;

+		syscallarg(off_t) offset;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct file *fp;

+	struct vnode *vp;

+	off_t offset;

+	int fd = SCARG(uap, fd);

+	if ((fp = fd_getfile(fdp, fd)) == NULL)

+		return (EBADF);

+	if ((fp->f_flag & FWRITE) == 0)

+		return (EBADF);

+	vp = (struct vnode *)fp->f_data;

+	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

+		return (ESPIPE);

+	}

+	FREF(fp);

+	offset = SCARG(uap, offset);

+	/* dofilewrite() will FRELE the descriptor for us */

+	return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte),

+	    &offset, retval));

+}

+/*

+ * Positional gather write system call.

+ */

+int

+sys_pwritev(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_pwritev_args /* {

+		syscallarg(int) fd;

+		syscallarg(const struct iovec *) iovp;

+		syscallarg(int) iovcnt;

+		syscallarg(int) pad;

+		syscallarg(off_t) offset;

+	} */ *uap = v;

+	struct filedesc *fdp = p->p_fd;

+	struct file *fp;

+	struct vnode *vp;

+	off_t offset;

+	int fd = SCARG(uap, fd);

+	if ((fp = fd_getfile(fdp, fd)) == NULL)

+		return (EBADF);

+	if ((fp->f_flag & FWRITE) == 0)

+		return (EBADF);

+	vp = (struct vnode *)fp->f_data;

+	if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) {

+		return (ESPIPE);

+	}

+	FREF(fp);

+	offset = SCARG(uap, offset);

+	/* dofilewritev() will FRELE the descriptor for us */

+	return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt),

+	    &offset, retval));

+}

+#ifdef UFS_EXTATTR

+/*

+ * Syscall to push extended attribute configuration information into the

+ * VFS.  Accepts a path, which it converts to a mountpoint, as well as

+ * a command (int cmd), and attribute name and misc data.  For now, the

+ * attribute name is left in userspace for consumption by the VFS_op.

+ * It will probably be changed to be copied into sysspace by the

+ * syscall in the future, once issues with various consumers of the

+ * attribute code have raised their hands.

+ *

+ * Currently this is used only by UFS Extended Attributes.

+ */

+int

+sys_extattrctl(struct proc *p, void *v, register_t *reval)

+{

+	struct sys_extattrctl_args /* {

+		syscallarg(const char *) path;

+		syscallarg(int) cmd;

+		syscallarg(const char *) filename;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+	} */ *uap = v;

+	struct vnode *filename_vp;

+	struct nameidata nd;

+	struct mount *mp;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	/*

+	 * SCARG(uap, attrname) not always defined.  We check again later

+	 * when we invoke the VFS call so as to pass in NULL there if needed.

+	 */

+	if (SCARG(uap, attrname) != NULL) {

+		error = copyinstr(SCARG(uap, attrname), attrname,

+		    EXTATTR_MAXNAMELEN, NULL);

+		if (error)

+			return (error);

+	}

+	/*

+	 * SCARG(uap, filename) not always defined.  If it is, grab

+	 * a vnode lock, which VFS_EXTATTRCTL() will later release.

+	 */

+	filename_vp = NULL;

+	if (SCARG(uap, filename) != NULL) {

+		NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,

+		    SCARG(uap, filename), p);

+		if ((error = namei(&nd)) != 0)

+			return (error);

+		filename_vp = nd.ni_vp;

+	}

+	/* SCARG(uap, path) always defined. */

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0) {

+		if (filename_vp != NULL)

+			vput(filename_vp);

+		return (error);

+	}

+	mp = nd.ni_vp->v_mount;

+	if (error) {

+		if (filename_vp != NULL)

+			vput(filename_vp);

+		return (error);

+	}

+	if (SCARG(uap, attrname) != NULL) {

+		error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), filename_vp,

+		    SCARG(uap, attrnamespace), attrname, p);

+	} else {

+		error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), filename_vp,

+		    SCARG(uap, attrnamespace), NULL, p);

+	}

+	/*

+	 * VFS_EXTATTRCTL will have unlocked, but not de-ref'd,

+	 * filename_vp, so vrele it if it is defined.

+	 */

+	if (filename_vp != NULL)

+		vrele(filename_vp);

+	return (error);

+}

+/*-

+ * Set a named extended attribute on a file or directory

+ *

+ * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",

+ *            kernelspace string pointer "attrname", userspace buffer

+ *            pointer "data", buffer length "nbytes", thread "td".

+ * Returns: 0 on success, an error number otherwise

+ * Locks: none

+ * References: vp must be a valid reference for the duration of the call

+ */

+static int

+extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname,

+    void *data, size_t nbytes, struct proc *p, register_t *retval)

+{

+	struct uio auio;

+	struct iovec aiov;

+	ssize_t cnt;

+	int error;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	aiov.iov_base = data;

+	aiov.iov_len = nbytes;

+	auio.uio_iov = &aiov;

+	auio.uio_iovcnt = 1;

+	auio.uio_offset = 0;

+	if (nbytes > INT_MAX) {

+		error = EINVAL;

+		goto done;

+	}

+	auio.uio_resid = nbytes;

+	auio.uio_rw = UIO_WRITE;

+	auio.uio_segflg = UIO_USERSPACE;

+	auio.uio_procp = p;

+	cnt = nbytes;

+	error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio,

+	    p->p_ucred, p);

+	cnt -= auio.uio_resid;

+	retval[0] = cnt;

+done:

+	VOP_UNLOCK(vp, 0, p);

+	return (error);

+}

+int

+sys_extattr_set_file(struct proc *p, void *v, register_t *retval)

+{

+	struct sys_extattr_set_file_args /* {

+		syscallarg(const char *) path;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+		syscallarg(void *) data;

+		syscallarg(size_t) nbytes;

+	} */ *uap = v;

+	struct nameidata nd;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

+	    NULL);

+	if (error)

+		return (error);

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,

+	    SCARG(uap, data), SCARG(uap, nbytes), p, retval);

+	vrele(nd.ni_vp);

+	return (error);

+}

+int

+sys_extattr_set_fd(struct proc *p, void *v, register_t *retval)

+{

+	struct sys_extattr_set_fd_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+		syscallarg(struct iovec *) iovp;

+		syscallarg(int) iovcnt;

+	} */ *uap = v;

+	struct file *fp;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

+	    NULL);

+	if (error)

+		return (error);

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	error = extattr_set_vp((struct vnode *)fp->f_data,

+	    SCARG(uap, attrnamespace), attrname, SCARG(uap, data),

+	    SCARG(uap, nbytes), p, retval);

+	FRELE(fp);

+	return (error);

+}

+/*-

+ * Get a named extended attribute on a file or directory

+ *

+ * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",

+ *            kernelspace string pointer "attrname", userspace buffer

+ *            pointer "data", buffer length "nbytes", thread "td".

+ * Returns: 0 on success, an error number otherwise

+ * Locks: none

+ * References: vp must be a valid reference for the duration of the call

+ */

+static int

+extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname,

+    void *data, size_t nbytes, struct proc *p, register_t *retval)

+{

+	struct uio auio;

+	struct iovec aiov;

+	ssize_t cnt;

+	size_t size;

+	int error;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_READ);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	/*

+	 * Slightly unusual semantics: if the user provides a NULL data

+	 * pointer, they don't want to receive the data, just the

+	 * maximum read length.

+	 */

+	if (data != NULL) {

+		aiov.iov_base = data;

+		aiov.iov_len = nbytes;

+		auio.uio_iov = &aiov;

+		auio.uio_offset = 0;

+		if (nbytes > INT_MAX) {

+			error = EINVAL;

+			goto done;

+		}

+		auio.uio_resid = nbytes;

+		auio.uio_rw = UIO_READ;

+		auio.uio_segflg = UIO_USERSPACE;

+		auio.uio_procp = p;

+		cnt = nbytes;

+		error = VOP_GETEXTATTR(vp, attrnamespace, attrname, &auio,

+		    NULL, p->p_ucred, p);

+		cnt -= auio.uio_resid;

+		retval[0] = cnt;

+	} else {

+		error = VOP_GETEXTATTR(vp, attrnamespace, attrname, NULL,

+		    &size, p->p_ucred, p);

+		retval[0] = size;

+	}

+done:

+	VOP_UNLOCK(vp, 0, p);

+	return (error);

+}

+int

+sys_extattr_get_file(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_extattr_get_file_args /* {

+		syscallarg(const char *) path;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+		syscallarg(void *) data;

+		syscallarg(size_t) nbytes;

+	} */ *uap = v;

+	struct nameidata nd;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

+	    NULL);

+	if (error)

+		return (error);

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return (error);

+	error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname,

+	    SCARG(uap, data), SCARG(uap, nbytes), p, retval);

+	vrele(nd.ni_vp);

+	return (error);

+}

+int

+sys_extattr_get_fd(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_extattr_get_fd_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+		syscallarg(void *) data;

+		syscallarg(size_t) nbytes;

+	} */ *uap = v;

+	struct file *fp;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

+	    NULL);

+	if (error)

+		return (error);

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	error = extattr_get_vp((struct vnode *)fp->f_data,

+	    SCARG(uap, attrnamespace), attrname, SCARG(uap, data),

+	    SCARG(uap, nbytes), p, retval);

+	FRELE(fp);

+	return (error);

+}

+/*

+ * extattr_delete_vp(): Delete a named extended attribute on a file or

+ *                      directory

+ *

+ * Arguments: unlocked vnode "vp", attribute namespace "attrnamespace",

+ *            kernelspace string pointer "attrname", proc "p"

+ * Returns: 0 on success, an error number otherwise

+ * Locks: none

+ * References: vp must be a valid reference for the duration of the call

+ */

+static int

+extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname,

+    struct proc *p)

+{

+	int error;

+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);

+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

+	error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL,

+	    p->p_ucred, p);

+	VOP_UNLOCK(vp, 0, p);

+	return (error);

+}

+int

+sys_extattr_delete_file(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_extattr_delete_file_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+	} */ *uap = v;

+	struct nameidata nd;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

+	     NULL);

+	if (error)

+		return(error);

+	NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);

+	if ((error = namei(&nd)) != 0)

+		return(error);

+	error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace),

+	    attrname, p);

+	vrele(nd.ni_vp);

+	return(error);

+}

+int

+sys_extattr_delete_fd(p, v, retval)

+	struct proc *p;

+	void *v;

+	register_t *retval;

+{

+	struct sys_extattr_delete_fd_args /* {

+		syscallarg(int) fd;

+		syscallarg(int) attrnamespace;

+		syscallarg(const char *) attrname;

+	} */ *uap = v;

+	struct file *fp;

+	char attrname[EXTATTR_MAXNAMELEN];

+	int error;

+	error = copyinstr(SCARG(uap, attrname), attrname, EXTATTR_MAXNAMELEN,

+	    NULL);

+	if (error)

+		return (error);

+	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)

+		return (error);

+	error = extattr_delete_vp((struct vnode *)fp->f_data,

+	    SCARG(uap, attrnamespace), attrname, p);

+	FRELE(fp);

+	return (error);

+}

+#endif

--- a/sys/src/cmd/diff/test/diff.rc

+++ b/sys/src/cmd/diff/test/diff.rc

@@ -5,7 +5,7 @@

 # tests=`{seq 15}

 tests=(1 2 3 4 5 6 7 11 12 13 15)

 for(t in $tests){

-	echo ../$O.diff -u diff-t$t.1 diff-t$t.2

-	../$O.diff -u diff-t$t.1 diff-t$t.2 > diff-t$t.out

+	echo ../$O.diff -u diff-t$t.l diff-t$t.r

+	../$O.diff -u diff-t$t.l diff-t$t.r > diff-t$t.out

 	cmp diff-t$t.out diff-t$t.expected #|| {echo 'failed '$t; exit failed}