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

   1 /* Copyright (C) 1998,2000,2002,2003,2005,2006 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <sys/types.h>
  22
  23 #include <linux/posix_types.h>
  24
  25 #include <sysdep.h>
  26 #include <sys/syscall.h>
  27 #include <bp-checks.h>
  28
  29 #include <kernel-features.h>
  30
  31 #ifdef __NR_getresgid
  32
  33 # ifdef __NR_getresgid32
  34 #  if __ASSUME_32BITUIDS == 0
  35 /* This variable is shared with all files that need to check for 32bit
  36    uids.  */
  37 extern int __libc_missing_32bit_uids;
  38 #  endif
  39 # endif /* __NR_getresgid32 */
  40
  41
  42 int
  43 __getresgid (gid_t *rgid, gid_t *egid, gid_t *sgid)
  44 {
  45 # if __ASSUME_32BITUIDS > 0
  46   return INLINE_SYSCALL (getresgid32, 3, CHECK_1 (rgid),
  47                          CHECK_1 (egid), CHECK_1 (sgid));
  48 # else
  49   __kernel_gid_t k_rgid, k_egid, k_sgid;
  50   int result;
  51 #  ifdef __NR_getresgid32
  52   if (__libc_missing_32bit_uids <= 0)
  53     {
  54       int r;
  55       int saved_errno = errno;
  56
  57       r = INLINE_SYSCALL (getresgid32, 3, CHECK_1 (rgid),
  58                           CHECK_1 (egid), CHECK_1 (sgid));
  59       if (r == 0 || errno != ENOSYS)
  60         return r;
  61
  62       __set_errno (saved_errno);
  63       __libc_missing_32bit_uids = 1;
  64     }
  65 #  endif /* __NR_getresgid32 */
  66
  67   result = INLINE_SYSCALL (getresgid, 3, __ptrvalue (&k_rgid),
  68                            __ptrvalue (&k_egid), __ptrvalue (&k_sgid));
  69
  70   if (result == 0)
  71     {
  72       *rgid = (gid_t) k_rgid;
  73       *egid = (gid_t) k_egid;
  74       *sgid = (gid_t) k_sgid;
  75     }
  76
  77   return result;
  78 # endif
  79 }
  80 libc_hidden_def (__getresgid)
  81 weak_alias (__getresgid, getresgid)
  82
  83 #else
  84 # include <posix/getresgid.c>
  85 #endif