libf2c/libU77/ttynam_.c

   1 /* Copyright (C) 1995, 1996 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 #include <sys/types.h>
  23 #if STDC_HEADERS
  24 #  include <stdlib.h>
  25 #endif
  26 #if HAVE_UNISTD_H
  27 #  include <unistd.h>           /* POSIX for ttyname */
  28 #endif
  29 #include <stdio.h>
  30 #if HAVE_STRING_H
  31 #  include <string.h>
  32 #else
  33 #  include <strings.h>
  34 #endif
  35 #include <errno.h>              /* for ENOSYS */
  36 #include "f2c.h"
  37
  38 extern integer G77_fnum_0 (integer * lunit);
  39 extern void s_copy (register char *a, register char *b, ftnlen la, ftnlen lb);
  40 /* Character */ void
  41 G77_ttynam_0 (char *ret_val, ftnlen ret_val_len, integer * lunit)
  42 {
  43 #if defined (HAVE_TTYNAME)
  44   size_t i;
  45   char *p;
  46
  47   p = ttyname (G77_fnum_0 (lunit));
  48   if (p != NULL)
  49     {
  50       i = strlen (p);
  51       s_copy (ret_val, p, ret_val_len, i);
  52     }
  53   else
  54     {
  55       s_copy (ret_val, " ", ret_val_len, 1);
  56     }
  57 #else
  58   errno = ENOSYS;
  59   s_copy (ret_val, " ", ret_val_len, 1);
  60 #endif
  61 }