FreeBSD 7.0 manual page repository

FreeBSD is a free computer operating system based on BSD UNIX originally. Many IT companies, like DeployIS is using it to provide an up-to-date, stable operating system.

id - return user identity

 

NAME

      id - return user identity
 

SYNOPSIS

      id [user]
      id -A
      id -G [-n] [user]
      id -M
      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:
 
      -A      Display the process audit user ID and other process audit proper‐
              ties, which requires privilege.
 
      -G      Display the different group IDs (effective, real and supplemen‐
              tary) as white-space separated numbers, in no particular order.
 
      -M      Display the MAC label of the current process.
 
      -P      Display the id as a password file entry.
 
      -a      Ignored for compatibility with other id implementations.
 
      -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, pre‐
              ceded by the keyword “uid”.  If the effective user ID is differ‐
              ent 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.
      The id utility exits 0 on success, and >0 if an error occurs.
      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.
 

Sections

Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.