ref: ec35f468e0eba87c9f09cbbe5fa8af2591e6f914
dir: /man/8/styxchat/
.TH STYXCHAT 8 .SH NAME styxchat \- exchange 9P (Styx) messages with a server or client .SH SYNOPSIS .B styxchat [ .RI -m " messagesize" ] [ .B -s ] [ .B -v ] [ .B -n ] [ .I destination ] .SH DESCRIPTION .I Styxchat exchanges messages with a 9P service. (9P was previously called `Styx' when used by Inferno, hence the command's name.) See .IR intro (5) for the protocol definition. It makes a connection to a given .IR destination , (or waits for a connection on .IR destination, if the .B -s option is specified), then reads a textual representation of 9P T-messages from the standard input and writes them on the connection, with a copy on standard output, simultaneously reading 9P R-messages from the connection and printing a representation of them on standard output. Each message is represented by one line on the standard output in the form of a literal of either .B Tmsg or .B Rmsg types defined in .IR styx (2). The .B -v option causes a second line to be written for .B Rmsg.Read and .B Tmsg.Write that shows the data transmitted, as text or binary as appropriate; if .B -v appears a second time, a third line is written that shows the text equivalent of apparently binary data (useful to see text that is surrounded by binary data). .PP By default, .I destination is the name of a file, typically one end of a named pipe. The .B \-n option causes .I destination to be interpreted as a network address, as accepted by .IR dial (2) (or .I listen with .BR -s ). If .I destination is not provided, .B styxchat reads and writes 9P messages on its standard input, using .B /dev/cons where it would usually use its standard input and output. .PP Each line of standard input has the form: .IP .br .BI Tversion " messagesize version" .br .BI Tauth " afid uname aname" .br .BI Tflush " oldtag" .br .BI Tattach " fid afid uname aname" .br .BI Twalk " fid newfid \f1[\fP name \f1... ]\fP" .br .BI Topen " fid mode" .br .BI Tcreate " fid name perm mode" .br .BI Tread " fid offset count" .br .BI Twrite " fid offset data" .br .BI Tclunk " fid" .br .BI Tremove " fid" .br .BI Tstat " fid" .br .BI Twstat " fid name uid gid mode mtime length" .br .BI nexttag " \f1[\fP tag \f1]\fP" .br .B dump .PD .PP The input is interpreted as space-separated fields using the quoting conventions of .IR sh (1), allowing fields to contain spaces. Empty lines and lines beginning with .B # are ignored. The first field on each line is normally the name of a T-message. Subsequent fields provide parameter values for the corresponding message. Integers are given in the format accepted for integers by the Limbo compiler (e.g. .BR 16rffff ): a .I tag is 16 bits, .I offset and .I length are 64 bits, and all others are 32-bit integers. If the an integer parameter field contains .BR ~0 , it is taken to be the `all ones' value of appropriate size for that parameter; this is particularly useful with .BR Twstat , where that value represents `no change'. In the ``mode'' field of a qid, letters can be given, representing mode bits: .B d for .BR QTDIR , .B l for .BR QTEXCL , .B a for .BR QTAPPEND , and .B u for .BR QTAUTH . In an .B Rstat message, the qid mode bits are copied into the .B Rstat mode field in the appropriate place. .PP Following the .IR sh (1) quoting rules, an empty string is represented by a field containing \f5''\f1. The .I data field is sent as its UTF-8 representation as an array of bytes. The value for .I fid can be .B nofid (or .BR NOFID ) to represent the `no fid' value in the protocol. The .I tag for each message is automatically supplied by .IR styxchat , starting from 1, and incremented with each successful message transmission. The .B nexttag command will cause subsequent tags to start from .IR tag ; if none is given, it will print the next tag value. The .I tag may be .B notag to represent the `no tag' value .RB ( 16rFFFF ). .PP The .B dump command has the same effect as a .B -v option, allowing data display to be enabled later. .PP By default, .I styxchat sends a 9P client's T-messages and prints a server's R-messages. The .B -s option causes it to present a server's view: it prints the T-messages from 9P clients, and sends R-messages as it reads a textual representation of them from standard input: .IP .br .BI Rversion " tag messagesize version" .br .BI Rauth " tag aqid" .br .BI Rflush " tag" .br .BI Rerror " tag ename" .br .BI Rattach " tag qid" .br .BI Rwalk " tag qid ..." .br .BI Ropen " tag qid iounit" .br .BI Rcreate " tag qid iounit" .br .BI Rread " tag data" .br .BI Rwrite " tag count" .br .BI Rclunk " tag" .br .BI Rremove " tag" .br .BI Rstat " tag qid mode atime mtime length name uid gid muid" .br .BI Rwstat " tag" .br .B dump .PD .PP The input conventions are as above, except that tags are required. A .I qid is a single field of the form \fIpath\f1\f5.\f1\fIvers\f1[\f5.\f1\fItype\f1], where the three values are decimal integers. .SH SOURCE .B /appl/cmd/styxchat.b .SH SEE ALSO .IR styx (2), .IR intro (5), .IR styxmon (8)