sysdeps/unix/sysv/linux/i386/setgid.c

   1 /* Copyright (C) 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <sys/types.h>
  22
  23 #include <sysdep.h>
  24 #include <sys/syscall.h>
  25
  26 #include <linux/posix_types.h>
  27
  28 extern int __syscall_setgid (__kernel_gid_t);
  29
  30 int
  31 __setgid (gid_t gid)
  32 {
  33   if (gid == (gid_t) ~0
  34       || gid != (gid_t) ((__kernel_gid_t) gid))
  35     {
  36       __set_errno (EINVAL);
  37       return -1;
  38     }
  39
  40   return INLINE_SYSCALL (setgid, 1, gid);
  41 }
  42 weak_alias (__setgid, setgid)