sysdeps/unix/sysv/linux/setegid.c

   1 /* Copyright (C) 1998-2017 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <unistd.h>
  20 #include <setxid.h>
  21
  22
  23 int
  24 setegid (gid_t gid)
  25 {
  26   int result;
  27
  28   if (gid == (gid_t) ~0)
  29     return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  30
  31 #ifdef __NR_setresgid32
  32   result = INLINE_SETXID_SYSCALL (setresgid32, 3, -1, gid, -1);
  33 #else
  34   result = INLINE_SETXID_SYSCALL (setresgid, 3, -1, gid, -1);
  35 #endif
  36
  37   return result;
  38 }
  39 #ifndef setegid
  40 libc_hidden_def (setegid)
  41 #endif