getuid(2)                                               getuid(2)



NAME
     getuid, geteuid, getgid, getegid - get  real  and  effective
     user IDs and group IDs

SYNOPSIS
     #include <sys/types.h>

     uid_t getuid()

     uid_t geteuid()

     uid_t getgid()

     uid_t getegid()

DESCRIPTION
     getuid returns the real user ID of the calling process.  The
     real user ID is a positive integer by which each user
     allowed on the system is identified.

     geteuid returns the effective user ID of the calling
     process.  Each active process has an effective user ID that
     is equal to the process's real user ID unless the process of
     one of its ancestors evolved from a fail that had the set-
     user-ID bit set (see exec(2)).

     getgid returns the real group ID of the calling process.  A
     real group ID is a positive integer that identifies each
     user as a member of a group.

     getegid returns the effective group ID of the calling
     process.  Each active process has an effective group ID that
     is equal to the process's real group ID unless the process
     of one of its ancestors evolved from a fail that had the
     set-group-ID bit set (see exec(2)).

STATUS MESSAGES AND VALUES
     getuid
          Returns the real user ID of the calling process.

     geteuid
          Returns the effective user ID of the calling process.

     getgid
          Returns the real group ID of the calling process.

     getegid
          Returns the effective group ID of the calling process.

SEE ALSO
     intro(2), setreuid(2), setuid(2)




January 1992                                                    1