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/* 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)
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