io/faccessat.c

   1 /* Test for access to file, relative to open directory.  Stub version.
   2    Copyright (C) 2006-2023 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stddef.h>
  22 #include <unistd.h>
  23 #include <sys/types.h>
  24
  25 int
  26 faccessat (int fd, const char *file, int type, int flag)
  27 {
  28   if (file == NULL || (flag & ~(AT_SYMLINK_NOFOLLOW | AT_EACCESS)) != 0
  29       || (type & ~(R_OK|W_OK|X_OK|F_OK)) != 0)
  30     {
  31       __set_errno (EINVAL);
  32       return -1;
  33     }
  34
  35   if (fd < 0 && fd != AT_FDCWD)
  36     {
  37       __set_errno (EBADF);
  38       return -1;
  39     }
  40
  41   __set_errno (ENOSYS);
  42   return -1;
  43 }
  44 stub_warning (faccessat)