1/* Copyright (C) 1995 Free Software Foundation, Inc.
2This file is part of GNU Fortran libU77 library.
3
4This library is free software; you can redistribute it and/or modify it
5under the terms of the GNU Library General Public License as published
6by the Free Software Foundation; either version 2 of the License, or
7(at your option) any later version.
8
9GNU Fortran is distributed in the hope that it will be useful,
10but WITHOUT ANY WARRANTY; without even the implied warranty of
11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12Library General Public License for more details.
13
14You should have received a copy of the GNU Library General Public
15License along with GNU Fortran; see the file COPYING.LIB.  If
16not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17Boston, MA 02111-1307, USA.  */
18
19#ifdef HAVE_CONFIG_H
20#include "config.h"
21#endif
22#if HAVE_UNISTD_H
23#  include <unistd.h>
24#endif
25#include "f2c.h"
26#include "fio.h"
27
28#ifdef KR_headers
29extern integer G77_fnum_0 ();
30
31logical G77_isatty_0 (lunit)
32     integer *lunit;
33#else
34extern integer G77_fnum_0 (integer *);
35
36logical G77_isatty_0 (integer *lunit)
37#endif
38{
39  if (*lunit>=MXUNIT || *lunit<0)
40    err(1,101,"isatty");
41  /* f__units is a table of descriptions for the unit numbers (defined
42     in io.h) with file descriptors rather than streams */
43  return (isatty(G77_fnum_0 (lunit)) ? TRUE_ : FALSE_);
44}
45