id(1)

NAME

id — print user and group IDs and names

SYNOPSIS

id [-u] [-nr] [user]

id [-g] [-nr] [user]

id [-G] [-n] [user]

id [-P]

DESCRIPTION

The id command writes a message to standard output, giving the user and group IDs and names for the process. If the effective and real IDs are different, both are printed.

If the process has supplementary group affiliations (see groups(1)), the supplementary group affiliations are also written.

If the user operand is specified and the process has appropriate privileges, the user and group IDs of the selected user are written. In this case, effective IDs are assumed to be identical to real IDs. If the selected user has more than one allowable group membership listed in the group database, then the group membership information is written.

Options

The following options modify the behavior described above.

-g: Display only the group ID. The default is the effective group ID; to modify, use the -r option. If the process has supplementary group affiliations that are different from the effective group ID (or the real ID if the -r option is used), display each such affiliation on the same line. The default is decimal format; to modify, use the -n option.
-G: Output all different group IDs (effective, real, and supplementary) only, using the format "%u\n". If there is more than one distinct group affiliation, output each such affiliation, using the format " %u", before the <newline> is output.
-n: With A -u, -g, or -G, display the ID name instead of the ID number.
-r: With -u, -g, or -G, display the real ID instead of the effective ID.
-u: Display only the user ID. The default is the effective user ID; to modify, use the -r option. The default is decimal format; to modify, use the -n option.
-P: Displays process resource group ID for the process along with the user and group IDs and names. The -P option ignores user argument. See HP Process Resource Manager in DEPENDENCIES.

RETURN VALUE

The error codes returned by id are :

0: Success.
1: User not found or invalid options or invalid combination of options.
2: The -P option is given when PRM is not supported or configured.

EXAMPLES

To display the current user and group data:

id

produces:

uid=1834(allanp) gid=20(users) 

To display the group ID number for the current process:

id -g 

produces:

20

To display the group name for the current process:

id -gn 

produces:

users 

To display the user and group data for another user:

id ralford 

produces:

uid=329(ralford) gid=20(users) 

To display the PRM group ID for the current process:

id -P 

produces:

uid=329(ralford) gid=20(users) prmid=1(OTHERS) 

DEPENDENCIES

HP Process Resource Manager

The -P option requires that the optional HP Process Resource Manager (PRM) software be installed and configured. See prmconfig(1) for a description of how to configure HP PRM, and prmconf(4) for the definition of the process resource group.

AUTHOR

id was developed by HP and AT&T.

STANDARDS CONFORMANCE

id: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2

id(1)

Technical documentation

» Table of Contents

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NAME

SYNOPSIS

DESCRIPTION

Options

RETURN VALUE

EXAMPLES

DEPENDENCIES

HP Process Resource Manager

AUTHOR

SEE ALSO

STANDARDS CONFORMANCE