sysdeps/unix/sysv/linux/getresuid.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 <unistd.h>
  20 #include <sys/types.h>
  21
  22 #include <linux/posix_types.h>
  23
  24 #include <sys/syscall.h>
  25 #ifdef __NR_getresuid
  26
  27 extern int __syscall_getresuid (__kernel_uid_t *ruid, __kernel_uid_t *euid,
  28                                 __kernel_uid_t *suid);
  29
  30 int
  31 getresuid (uid_t *ruid, uid_t *euid, uid_t *suid)
  32 {
  33   __kernel_uid_t k_ruid, k_euid, k_suid;
  34
  35   if (__syscall_getresuid (&k_ruid, &k_euid, &k_suid) < 0)
  36     return -1;
  37
  38   *ruid = (uid_t) k_ruid;
  39   *euid = (uid_t) k_euid;
  40   *suid = (uid_t) k_suid;
  41   return 0;
  42 }
  43 #else
  44 # include <sysdeps/generic/getresuid.c>
  45 #endif