/* Copyright (C) 1994-2018 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 <unistd.h>

#include <hurd.h>

#include <hurd/term.h>

#include <hurd/fd.h>

/* Return the pathname of the terminal FD is open on, or NULL on errors.

   The returned storage is good only until the next call to this function.  */

char *

ttyname (int fd)

{

  error_t err;

  static char nodename[1024];	/* XXX */

  nodename[0] = '\0';

  if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))

    {

      if (err == MIG_BAD_ID || err == EOPNOTSUPP)

	err = ENOTTY;

      return __hurd_dfail (fd, err), NULL;

    }

  return nodename;

}