/* 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 <dirent.h>

#include <errno.h>

#include <fcntl.h>

#include <stddef.h>

#include <sys/stat.h>

#include <not-cancel.h>

DIR *

__fdopendir (int fd)

{

  struct stat64 statbuf;

  if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &statbuf), 0) < 0)

    return NULL;

  if (__glibc_unlikely (! S_ISDIR (statbuf.st_mode)))

    {

      __set_errno (ENOTDIR);

      return NULL;

    }

  /* Make sure the descriptor allows for reading.  */

  int flags = __fcntl64_nocancel (fd, F_GETFL);

  if (__glibc_unlikely (flags == -1))

    return NULL;

  if (__glibc_unlikely ((flags & O_ACCMODE) == O_WRONLY))

    {

      __set_errno (EINVAL);

      return NULL;

    }

  return __alloc_dir (fd, false, flags, &statbuf);

}

weak_alias (__fdopendir, fdopendir)