glibc/io/faccessat.c

/* Test for access to file, relative to open directory.  Stub version.
   Copyright (C) 2006-2015 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/types.h>

int
faccessat (fd, file, type, flag)
     int fd;
     const char *file;
     int type;
     int flag;
{
  if (file == NULL || (flag & ~(AT_SYMLINK_NOFOLLOW | AT_EACCESS)) != 0
      || (type & ~(R_OK|W_OK|X_OK|F_OK)) != 0)
    {
      __set_errno (EINVAL);
      return -1;
    }

  if (fd < 0 && fd != AT_FDCWD)
    {
      __set_errno (EBADF);
      return -1;
    }

  __set_errno (ENOSYS);
  return -1;
}
stub_warning (faccessat)