Net2/usr/src/usr.bin/id/id.1

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.\"	@(#)id.1	5.1 (Berkeley) 6/29/91
.\"
.Dd "June 29, 1991"
.Dt ID 1
.UC
.Sh NAME
.Nm id
.Nd return user identity
.Sh SYNOPSIS
.Nm id
.Op Ar user
.Nm id
.Fl G Op Fl n
.Op Ar user
.Nm id
.Fl g Op Fl nr
.Op Ar user
.Nm id
.Fl u Op Fl nr
.Op Ar user
.Sh DESCRIPTION
The
.Nm id
utility displays the user and group names and numeric IDs, of the
calling process, to the standard output.
If the real and effective IDs are different both are displayed,
otherwise only the real ID is displayed.
.Pp
If a
.Ar user
(login name or user ID)
is specified, the user and group IDs of that user are displayed.
In this case, the real and effective IDs are assumed to be the same.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl G
Display all of the different group IDs (effective, real and supplementary)
as white-space separated numbers.
.It Fl g
Display only the effective group ID as a number.
.It Fl n
Display the name of the user or group ID instead of the number.
.It Fl r
Display the real ID instead of the effective ID.
.It Fl u
Display only the effective user ID as a number.
.El
.Pp
If any of the ID numbers cannot be mapped into names, the number is displayed
instead.
.Pp
The
historic
.Xr groups 1
command is equivalent to:
.Nm id Fl Gn Op Ar user .
.Pp
The
.Nm id
utility exits 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr groups 1 ,
.Xr who 1 ,
.Xr whoami 1
.Sh STANDARDS
The
.Nm logname
function is expected to conform to
.St -p1003.2 .
.Sh HISTORY
The
.Nm
command is
.Ud .