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f7a9f785 1/* Copyright (C) 1994-2016 Free Software Foundation, Inc.
ebbad4cc 2 This file is part of the GNU C Library.
28f540f4 3
ebbad4cc 4 The GNU C Library is free software; you can redistribute it and/or
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5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
28f540f4 8
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9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2 12 Lesser General Public License for more details.
28f540f4 13
41bdb6e2 14 You should have received a copy of the GNU Lesser General Public
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15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
28f540f4 17
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18#include <errno.h>
19#include <unistd.h>
20#include <hurd/fd.h>
21#include <hurd/term.h>
22
23/* Return 1 if FD is a terminal, 0 if not. */
24int
bd2260a2 25__isatty (int fd)
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26{
27 error_t err;
28 mach_port_t id;
29
30 err = HURD_DPORT_USE (fd, __term_getctty (port, &id));
31 if (! err)
32 __mach_port_deallocate (__mach_task_self (), id);
33
34 return !err;
35}
36
37weak_alias (__isatty, isatty)