sysdeps/unix/sysv/linux/i386/setfsuid.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 <sys/syscall.h>
  21 #include <sys/types.h>
  22 #include <unistd.h>
  23
  24 #include <linux/posix_types.h>
  25
  26 #ifdef __NR_setfsuid
  27 extern int __syscall_setfsuid (__kernel_uid_t);
  28
  29 int
  30 setfsuid (uid_t uid)
  31 {
  32   if (uid != (uid_t) ((__kernel_uid_t) uid))
  33     {
  34       __set_errno (EINVAL);
  35       return -1;
  36     }
  37
  38   return __syscall_setfsuid (uid);
  39 }
  40 #else
  41 int
  42 setfsuid (uid_t uid)
  43 {
  44   __set_errno (ENOSYS);
  45   return -1;
  46 }
  47 #endif