libf2c/libU77/getlog_.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 #include <sys/types.h>
  23 #if HAVE_STDLIB_H
  24 #  include <stdlib.h>
  25 #else
  26 #  include <stdio.h>
  27 #endif
  28 #include <stdio.h>
  29 #if HAVE_UNISTD_H
  30 #  include <unistd.h>
  31 #endif
  32 #if HAVE_STRING_H
  33 #  include <string.h>
  34 #else
  35 #  include <strings.h>
  36 #endif
  37 #include <errno.h>              /* for ENOSYS */
  38 #include "f2c.h"
  39
  40 /* getlogin not in svr1-3 */
  41
  42 /* SGI also has character*(*) function getlog() */
  43
  44 extern void s_copy (register char *a, register char *b, ftnlen la, ftnlen lb);
  45 /* Subroutine */ int
  46 G77_getlog_0 (char *str, const ftnlen Lstr)
  47 {
  48   size_t i;
  49   char *p;
  50   int status;
  51
  52 #if defined (HAVE_GETLOGIN)
  53   p = getlogin ();
  54   if (p != NULL)
  55     {
  56       i = strlen (p);
  57       s_copy (str, p, Lstr, i);
  58     }
  59   else
  60     {
  61       s_copy (str, " ", Lstr, 1);
  62     }
  63   status = 0;
  64 #else
  65   errno = ENOSYS;
  66   status = -1;
  67 #endif
  68   return status;
  69 }