libf2c/libU77/isatty_.c

   1 /* Copyright (C) 1995 Free Software Foundation, Inc.
   2 This file is part of GNU Fortran libU77 library.
   3
   4 This library is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU Library General Public License as published
   6 by the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 GNU Fortran 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
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with GNU Fortran; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, 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 extern integer G77_fnum_0 (integer *);
  29
  30 logical
  31 G77_isatty_0 (integer * lunit)
  32 {
  33   if (*lunit >= MXUNIT || *lunit < 0)
  34     err (1, 101, "isatty");
  35   /* f__units is a table of descriptions for the unit numbers (defined
  36      in io.h) with file descriptors rather than streams */
  37   return (isatty (G77_fnum_0 (lunit)) ? TRUE_ : FALSE_);
  38 }