/* Open a directory stream from a file descriptor.  Hurd version.

   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 <hurd.h>

#include <hurd/fd.h>

#include <fcntl.h>

DIR *_hurd_fd_opendir (struct hurd_fd *d); /* opendir.c */

/* Open a directory stream on FD.  */

DIR *

__fdopendir (int fd)

{

  struct hurd_fd *d = _hurd_fd_get (fd);

  if (d == NULL)

    {

      errno = EBADF;

      return NULL;

    }

  /* Ensure that it's a directory.  */

  error_t err = HURD_FD_PORT_USE

    (d, ({

	file_t dir = __file_name_lookup_under (port, "/",

					       O_DIRECTORY | O_NOTRANS, 0);;

	if (dir != MACH_PORT_NULL)

	  __mach_port_deallocate (__mach_task_self (), dir);

	dir != MACH_PORT_NULL ? 0 : errno;

      }));

  if (err)

    {

      errno = err;

      return NULL;

    }

  return _hurd_fd_opendir (d);

}

weak_alias (__fdopendir, fdopendir)