id(1M)							  System Administration Commands						    id(1M)

NAME

       id - return user identity

SYNOPSIS

       /usr/bin/id [-p] [user]

       /usr/bin/id -a [-p] [user]

       /usr/xpg4/bin/id [-p] [user]

       /usr/xpg4/bin/id -G [-n] [user]

       /usr/xpg4/bin/id -g [-nr] [user]

       /usr/xpg4/bin/id -u [-nr] [user]

DESCRIPTION

       If  no  user  operand  is provided, the id utility writes the user and group IDs and the corresponding user and group names of the invoking
       process to standard output. If the effective and real IDs do not match, both are written. If multiple groups are supported by the  underly-
       ing system, /usr/xpg4/bin/id also writes the supplementary group affiliations of the invoking process.

       If  a  user operand is provided and the process has the 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, /usr/xpg4/bin/id writes them in the same manner as the supplementary groups described in the preceding paragraph.

   Formats
       The following formats are used when the LC_MESSAGES locale category specifies the "C" locale. In other locales, the strings uid, gid, euid,
       egid, and groups may be replaced with more appropriate strings corresponding to the locale.

       "uid=%u(%s) gid=%u(%s)
" <real user ID>, <user-name>,
	   <real group ID>, <group-name>

       If the effective and real user IDs do not match, the following are inserted immediately before the 
 character in the previous format:

       " euid=%u(%s)"

       with the following arguments added at the end of the argument list:

       <effective user ID>, <effective user-name>

       If the effective and real group IDs do not match, the following is inserted directly before the 
 character  in  the  format  string  (and
       after any addition resulting from the effective and real user IDs not matching):

       " egid=%u(%s)"

       with the following arguments added at the end of the argument list:

       <effectivegroup-ID>, <effectivegroupname>

       If  the	process  has  supplementary  group  affiliations  or the selected user is allowed to belong to multiple groups, the first is added
       directly before the NEWLINE character in the format string:

       " groups=%u(%s)"

       with the following arguments added at the end of the argument list:

       <supplementary group ID>, <supplementary group name>

       and the necessary number of the following added after that for any remaining supplementary group IDs:

       ",%u(%s)"

       and the necessary number of the following arguments added at the end of the argument list:

       <supplementary group ID>, <supplementary group name>

       If any of the user ID, group ID, effective user ID, effective group ID or supplementary/multiple group IDs cannot be mapped by  the  system
       into printable user or group names, the corresponding (%s) and name argument is omitted from the corresponding format string.

       When any of the options are specified, the output format is as described under OPTIONS.

OPTIONS

       The  following  option  is supported by both /usr/bin/id and /usr/xpg4/bin/id. For /usr/xpg4/bin/id, -p is invalid if specified with any of
       the -G, -g, or -u options.

       -p		       Reports additionally the current project membership of the invoking process. The  project  is  reported	using  the
			       format:

			       "projid=%u(%s)"

			       which is inserted prior to the 0fR character of the default format described in the Formats section. The arguments

			       <project ID>,<project name>

			       are  appended  to  the end of the argument list.  If the project ID cannot be mapped by the system into a printable
			       project name, the corresponding (%s) and name argument is omitted from the corresponding format string.

   /usr/bin/id
       The following option is supported for /usr/bin/id only:

       -a	Reports user name, user  ID and all the groups to which the user belongs.

   /usr/xpg4/bin/id
       The following options are supported for /usr/xpg4/bin/id only:

       -G	Outputs all different group IDs (effective, real and supplementary) only, using the format "%u
". If there is more than one  dis-
		tinct group affiliation, output each such affiliation, using the format " %u", before the NEWLINE character is output.

       -g	Outputs only the effective group ID, using the format "%u
".

       -n	Outputs the name in the format "%s" instead of the numeric ID using the format "%u".

       -r	Outputs the real ID instead of the effective ID.

       -u	Outputs only the effective user ID, using the format "%u
".

OPERANDS

       The following operand is supported:

       user	The user (login) name for which information is to be written.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions  of the following environment variables that affect the execution of id: LANG, LC_ALL, LC_CTYPE, LC_MES-
       SAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

   /usr/bin/id
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu, SUNWcar		   |
       +-----------------------------+-----------------------------+

   /usr/xpg4/bin/id
       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWxcu4			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       fold(1), logname(1), who(1), getgid(2), getgroups(2), getprojid(2), getuid(2), attributes(5), environ(5), standards(5)

NOTES

       Output produced by the -G option and by the default case could potentially produce very long lines on systems that support large numbers of
       supplementary groups.

SunOS 5.10							    24 Jan 2000 							    id(1M)