shithub: purgatorio

ref: a920c765f2b4130590fb5971a50690b21664957a
dir: /man/1/ftest/

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.TH FTEST 1
.SH NAME
ftest, newer \- test file attributes
.SH SYNOPSIS
.B ftest
.I test
.I arg
.PP
.B newer
.I file1
.I file2
.SH DESCRIPTION
.I Ftest
checks the specified attribute of 
.I arg
according to
.I test
and yields an exit status signifying the result.
For all
.IR test s
apart from
.BR -t ,
.I arg
is the name of the file to be tested;
for
.BR -t ,
it is the number of a file descriptor.
Available tests are:
.TP
.B -d
True if the file exists and is a directory.
.TP
.B -e
True if the file exists.
.TP
.B -f
True if the file exists and is a regular file.
.TP
.B -r
True if the file exists and is readable.
.TP
.B -s
True if the file exists and has non-zero size.
.TP
.B -t
True if the open file represented by
the number
.I arg
represents the same file as
.BR /dev/cons .
.TP
.B -w
True if the file exists and is writable.
.TP
.B -x
True if the file exists and is executable.
.LP
.I Newer
checks whether
.I file1
exists and is no older than
.IR file2 ,
which must also exist;
if so, it yields a true exit status.
Otherwise, it yields an error status.
Neither file may be a directory.
.SH SOURCE
.B /appl/cmd/ftest.b
.br
.B /appl/cmd/newer.b
.SH SEE ALSO
.IR sys-stat (2)
.SH BUGS
These commands
work only with
.IR sh (1)
as none of the other Inferno shells
can check the exit status of a command.
.PP
Checking for read, write and execute capabilities
is speculative - the file server has the last say.
Group permissions are ignored.