src/pwd.c

   1 /* pwd - print current directory
   2    Copyright (C) 94, 1995 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 /* Jim Meyering <meyering@comco.com> */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23
  24 #include "system.h"
  25 #include "version.h"
  26 #include "long-options.h"
  27 #include "error.h"
  28
  29 char *xgetcwd ();
  30
  31 /* The name this program was run with. */
  32 char *program_name;
  33
  34 static void
  35 usage (status)
  36      int status;
  37 {
  38   if (status != 0)
  39     fprintf (stderr, "Try `%s --help' for more information.\n",
  40              program_name);
  41   else
  42     {
  43       printf ("Usage: %s [OPTION]\n", program_name);
  44       printf ("\
  45 Print the full filename of the current working directory.\n\
  46 \n\
  47   --help      display this help and exit\n\
  48   --version   output version information and exit\n\
  49 ");
  50     }
  51   exit (status);
  52 }
  53
  54 void
  55 main (argc, argv)
  56      int argc;
  57      char **argv;
  58 {
  59   char *wd;
  60
  61   program_name = argv[0];
  62
  63   parse_long_options (argc, argv, "pwd", version_string, usage);
  64
  65   if (argc != 1)
  66     error (0, 0, "ignoring non-option arguments");
  67
  68   wd = xgetcwd ();
  69   if (wd == NULL)
  70     error (1, errno, "cannot get current directory");
  71   printf ("%s\n", wd);
  72
  73   exit (0);
  74 }