/* Copyright (C) 2005-2018 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 <stdarg.h>

#include <stddef.h>

#include <stdio.h>

#include <sys/stat.h>

#include <kernel-features.h>

/* Some mostly-generic code (e.g. sysdeps/posix/getcwd.c) uses this variable

   if __ASSUME_ATFCTS is not defined.  */

#ifndef __ASSUME_ATFCTS

int __have_atfcts;

#endif

/* Open FILE with access OFLAG.  Interpret relative paths relative to

   the directory associated with FD.  If O_CREAT or O_TMPFILE is in OFLAG, a

   third argument is the file protection.  */

int

__openat (int fd, const char *file, int oflag, ...)

{

  int mode;

  if (file == NULL)

    {

      __set_errno (EINVAL);

      return -1;

    }

  if (fd != AT_FDCWD && file[0] != '/')

    {

      /* Check FD is associated with a directory.  */

      struct stat64 st;

      if (__fxstat64 (_STAT_VER, fd, &st) != 0)

	return -1;

      if (!S_ISDIR (st.st_mode))

	{

	  __set_errno (ENOTDIR);

	  return -1;

	}

    }

  if (__OPEN_NEEDS_MODE (oflag))

    {

      va_list arg;

      va_start (arg, oflag);

      mode = va_arg (arg, int);

      va_end (arg);

      ignore_value (mode);

    }

  __set_errno (ENOSYS);

  return -1;

}

libc_hidden_def (__openat)

weak_alias (__openat, openat)

stub_warning (openat)

/* __openat_2 is a generic wrapper that calls __openat.

   So give a stub warning for that symbol too.  */

stub_warning (__openat_2)