140 lines
4.3 KiB
Groff
140 lines
4.3 KiB
Groff
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.\" Copyright (c) 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Institute of Electrical and Electronics Engineers, Inc.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)id.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd "June 6, 1993"
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.Dt ID 1
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.Os BSD 4.4
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.Sh NAME
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.Nm id
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.Nd return user identity
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.Sh SYNOPSIS
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.Nm id
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.Op Ar user
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.Nm id
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.Fl G Op Fl n
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.Op Ar user
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.Nm id
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.Fl g Op Fl nr
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.Op Ar user
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.Nm id
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.Fl p
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.Nm id
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.Fl u Op Fl nr
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.Op Ar user
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.Sh DESCRIPTION
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The
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.Nm id
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utility displays the user and group names and numeric IDs, of the
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calling process, to the standard output.
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If the real and effective IDs are different, both are displayed,
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otherwise only the real ID is displayed.
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.Pp
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If a
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.Ar user
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(login name or user ID)
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is specified, the user and group IDs of that user are displayed.
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In this case, the real and effective IDs are assumed to be the same.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl G
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Display the different group IDs (effective, real and supplementary)
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as white-space separated numbers, in no particular order.
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.It Fl g
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Display the effective group ID as a number.
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.It Fl n
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Display the name of the user or group ID for the
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.Fl G ,
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.Fl g
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and
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.Fl u
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options instead of the number.
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If any of the ID numbers cannot be mapped into names, the number will be
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displayed as usual.
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.It Fl p
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Make the output human-readable.
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If the user name returned by
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.Xr getlogin 2
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is different from the login name referenced by the user ID, the name
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returned by
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.Xr getlogin 2
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is displayed, preceded by the keyword ``login''.
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The user ID as a name is displayed, preceded by the keyword ``uid''.
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If the effective user ID is different from the real user ID, the real user
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ID is displayed as a name, preceded by the keyword ``euid''.
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If the effective group ID is different from the real group ID, the real group
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ID is displayed as a name, preceded by the keyword ``rgid''.
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The list of groups to which the user belongs is then displayed as names,
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preceded by the keyword ``groups''.
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Each display is on a separate line.
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.It Fl r
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Display the real ID for the
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.Fl g
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and
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.Fl u
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options instead of the effective ID.
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.It Fl u
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Display the effective user ID as a number.
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.El
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.Pp
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The
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.Nm id
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utility exits 0 on success, and >0 if an error occurs.
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.Sh SEE ALSO
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.Xr who 1
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.Sh STANDARDS
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The
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.Nm id
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function is expected to conform to
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.St -p1003.2 .
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.Sh HISTORY
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The
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historic
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.Xr groups 1
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command is equivalent to
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.Dq Nm id Fl Gn Op Ar user .
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.Pp
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The
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historic
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.Xr whoami 1
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command is equivalent to
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.Dq Nm id Fl un .
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.Pp
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The
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.Nm
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command appears in
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.Bx 4.4 .
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