setreuid(2)                                           setreuid(2)



     NAME
          setreuid - set real and effective user ID's

     SYNOPSIS
          setreuid(ruid, euid)
          int ruid, euid;

     DESCRIPTION
          The real and effective user ID's of the current process are
          set according to the arguments.  If ruid or euid is -1, the
          current uid is filled in by the system.  Only the super-user
          may modify the real uid of a process.  Users other than the
          super-user may change the effective uid of a process only to
          the real uid.

     RETURN VALUE
          Upon successful completion, a value of 0 is returned.
          Otherwise, a value of -1 is returned and errno is set to
          indicate the error.

     ERRORS
          [EPERM]    The current process is not the super-user and a
                     change other than changing the effective user ID
                     to the real user ID was specified.

     SEE ALSO
          getuid(2), setregid(2), setuid(3).




























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