/* 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/fd.h>

#include <hurd/term.h>

/* Return 1 if FD is a terminal, 0 if not.  */

int

__isatty (int fd)

{

  error_t err;

  mach_port_t id;

  err = HURD_DPORT_USE (fd, __term_getctty (port, &id));

  if (! err)

    __mach_port_deallocate (__mach_task_self (), id);

  return !err;

}

weak_alias (__isatty, isatty)