setreuid(2)                                           setreuid(2)



     NAME
          setreuid - set real and effective user ID

     SYNOPSIS
          int 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 superuser
          may modify the real uid of a process.  Users other than the
          superuser may change the effective uid of a process only to
          the real user ID.

     RETURN VALUE
          Upon successful completion, a value of 0 is returned.  Oth-
          erwise, a value of -1 is returned and errno is set to indi-
          cate the error.

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

     NOTES
          This call only works in COMPAT_BSDPROT compatibility mode.

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

























     April, 1990                                                     1