sysdeps/unix/sysv/linux/access.c

   1 /* Linux implementation for access function.
   2    Copyright (C) 2016-2017 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 #include <fcntl.h>
  20 #include <unistd.h>
  21 #include <sysdep-cancel.h>
  22
  23 int
  24 __access_noerrno (const char *file, int type)
  25 {
  26   int res;
  27   INTERNAL_SYSCALL_DECL (err);
  28 #ifdef __NR_access
  29   res = INTERNAL_SYSCALL_CALL (access, err, file, type);
  30 #else
  31   res = INTERNAL_SYSCALL_CALL (faccessat, err, AT_FDCWD, file, type);
  32 #endif
  33   if (INTERNAL_SYSCALL_ERROR_P (res, err))
  34     return INTERNAL_SYSCALL_ERRNO (res, err);
  35   return 0;
  36 }
  37
  38 int
  39 __access (const char *file, int type)
  40 {
  41 #ifdef __NR_access
  42   return INLINE_SYSCALL_CALL (access, file, type);
  43 #else
  44   return INLINE_SYSCALL_CALL (faccessat, AT_FDCWD, file, type);
  45 #endif
  46 }
  47 weak_alias (__access, access)