.\"
.\" Copyright (c) 2003 Gunnar Ritter
.\"
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.\" warranty. In no event will the authors be held liable for any damages
.\" arising from the use of this software.
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.\" including commercial applications, and to alter it and redistribute
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.\" Sccsid @(#)id.1	1.10 (gritter) 1/24/05
.TH ID 1 "1/24/05" "Heirloom Toolchest" "User Commands"
.SH NAME
id \- print user and group IDs and names
.SH SYNOPSIS
\fB/usr/5bin/id\fR
.br
\fB/usr/5bin/id\fR \fB\-a\fR
.sp
\fB/usr/5bin/posix/id\fR [\fIuser\fR]
.br
\fB/usr/5bin/posix/id\fR \fB\-a\fR [\fIuser\fR]
.br
\fB/usr/5bin/posix/id\fR \fB\-G\fR [\fB\-n\fR] [\fIuser\fR]
.br
\fB/usr/5bin/posix/id\fR \fB\-g\fR [\fB\-nr\fR] [\fIuser\fR]
.br
\fB/usr/5bin/posix/id\fR \fB\-u\fR [\fB\-nr\fR] [\fIuser\fR]
.SH DESCRIPTION
The
.I id
command outputs the numerical and symbolic
user and group IDs
of the invoking user or,
if the
.I user
argument is given for
.BR /usr/5bin/posix/id ,
for the named
.IR user.
If an effective ID does not match the corresponding real ID,
both are printed.
.PP
The
.B /usr/5bin/posix/id
adds supplementary group memberships to the output by default.
.PP
.B /usr/5bin/s42/id
and
.B /usr/5bin/posix2001/id
are identical to
.BR /usr/5bin/posix/id .
.PP
The following options are accepted:
.SS /usr/5bin/id
.TP
.B \-a
Adds supplementary group memberships to the output.
.SS /usr/5bin/posix/id
.TP
.B \-a
Adds the primary group to the list of supplementary groups.
.TP
.B \-G
Writes real, effective and supplementary group ID numbers only.
.TP
.B \-g
Writes the effective group ID number only.
.TP
.B \-n
Modifies the output of the
.BR \-G ,
.BR \-g ,
and
.B \-u
options to print symbolic instead of numeric IDs.
.TP
.B \-r
Causes real instead of effective IDs to be printed.
.TP
.B \-u
Writes the effective user ID number only.
.SH FILES
.TP
.B /etc/passwd
.TP
.B /etc/group
.SH "SEE ALSO"
groups(1),
logins(1),
getuid(2),
geteuid(2),
getgroups(2),
group(5),
passwd(5)
.SH NOTES
Use of
.I id
with any options or arguments is unportable.
For portable programs, use
.IR sed (1)
to cut the appropriate portions off the default output of
.I id
(using the invariable `uid=' and `gid=' strings as orientation)
and
.IR groups (1)
or
.IR logins (1)
if you need more information than available by this method.