sysdeps/unix/sysv/linux/not-errno.h

   1 /* Syscall wrapper that do not set errno.  Linux version.
   2    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* This function is used on maybe_enable_malloc_check (elf/dl-tunables.c)
  20    and to avoid having to build/use multiple versions if stack protection
  21    in enabled it is defined as inline.  */
  22 static inline int
  23 __access_noerrno (const char *pathname, int mode)
  24 {
  25   int res;
  26   INTERNAL_SYSCALL_DECL (err);
  27 #ifdef __NR_access
  28   res = INTERNAL_SYSCALL_CALL (access, err, pathname, mode);
  29 #else
  30   res = INTERNAL_SYSCALL_CALL (faccessat, err, AT_FDCWD, pathname, mode);
  31 #endif
  32   if (INTERNAL_SYSCALL_ERROR_P (res, err))
  33     return INTERNAL_SYSCALL_ERRNO (res, err);
  34   return 0;
  35 }