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ID(1)			FreeBSD	General	Commands Manual			 ID(1)

NAME
     id	-- return user identity

SYNOPSIS
     id	[user]
     id	-G [-n]	[user]
     id	-P [user]
     id	-g [-nr] [user]
     id	-p [user]
     id	-u [-nr] [user]

DESCRIPTION
     The 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 dis-
     played.

     If	a 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.

     The options are as	follows:

     -G	     Display the different group IDs (effective, real and supplemen-
	     tary) as white-space separated numbers, in	no particular order.

     -P	     Display the id as a password file entry.

     -g	     Display the effective group ID as a number.

     -n	     Display the name of the user or group ID for the -G, -g and -u
	     options instead of	the number.  If	any of the ID numbers cannot
	     be	mapped into names, the number will be displayed	as usual.

     -p	     Make the output human-readable.  If the user name returned	by
	     getlogin(2) is different from the login name referenced by	the
	     user ID, the name returned	by getlogin(2) is displayed, preceded
	     by	the keyword ``login''.	The user ID as a name is displayed,
	     preceded by the keyword ``uid''.  If the effective	user ID	is
	     different from the	real user ID, the real user ID is displayed as
	     a name, preceded by the keyword ``euid''.	If the effective group
	     ID	is different from the real group ID, the real group ID is dis-
	     played as a name, preceded	by the keyword ``rgid''.  The list of
	     groups to which the user belongs is then displayed	as names, pre-
	     ceded by the keyword ``groups''.  Each display is on a separate
	     line.

     -r	     Display the real ID for the -g and	-u options instead of the
	     effective ID.

     -u	     Display the effective user	ID as a	number.

DIAGNOSTICS
     The id utility exits 0 on success,	and >0 if an error occurs.

SEE ALSO
     who(1)

STANDARDS
     The id function is	expected to conform to IEEE Std	1003.2 (``POSIX.2'').

HISTORY
     The historic groups(1) command is equivalent to ``id -Gn [user]''.

     The historic whoami(1) command is equivalent to ``id -un''.

     The id command appeared in	4.4BSD.

FreeBSD	9.3			 June 6, 1993			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | STANDARDS | HISTORY

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