1/* link utility for GNU.
2   Copyright (C) 2001-2002, 2004, 2007-2010 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 3 of the License, or
7   (at your option) 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, see <http://www.gnu.org/licenses/>.  */
16
17/* Written by Michael Stone */
18
19/* Implementation overview:
20
21   Simply call the system 'link' function */
22
23#include <config.h>
24#include <stdio.h>
25#include <getopt.h>
26#include <sys/types.h>
27
28#include "system.h"
29#include "error.h"
30#include "long-options.h"
31#include "quote.h"
32
33/* The official name of this program (e.g., no `g' prefix).  */
34#define PROGRAM_NAME "link"
35
36#define AUTHORS proper_name ("Michael Stone")
37
38void
39usage (int status)
40{
41  if (status != EXIT_SUCCESS)
42    fprintf (stderr, _("Try `%s --help' for more information.\n"),
43             program_name);
44  else
45    {
46      printf (_("\
47Usage: %s FILE1 FILE2\n\
48  or:  %s OPTION\n"), program_name, program_name);
49      fputs (_("Call the link function to create a link named FILE2\
50 to an existing FILE1.\n\n"),
51             stdout);
52      fputs (HELP_OPTION_DESCRIPTION, stdout);
53      fputs (VERSION_OPTION_DESCRIPTION, stdout);
54      emit_ancillary_info ();
55    }
56  exit (status);
57}
58
59int
60main (int argc, char **argv)
61{
62  initialize_main (&argc, &argv);
63  set_program_name (argv[0]);
64  setlocale (LC_ALL, "");
65  bindtextdomain (PACKAGE, LOCALEDIR);
66  textdomain (PACKAGE);
67
68  atexit (close_stdout);
69
70  parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, Version,
71                      usage, AUTHORS, (char const *) NULL);
72  if (getopt_long (argc, argv, "", NULL, NULL) != -1)
73    usage (EXIT_FAILURE);
74
75  if (argc < optind + 2)
76    {
77      if (argc < optind + 1)
78        error (0, 0, _("missing operand"));
79      else
80        error (0, 0, _("missing operand after %s"), quote (argv[optind]));
81      usage (EXIT_FAILURE);
82    }
83
84  if (optind + 2 < argc)
85    {
86      error (0, 0, _("extra operand %s"), quote (argv[optind + 2]));
87      usage (EXIT_FAILURE);
88    }
89
90  if (link (argv[optind], argv[optind + 1]) != 0)
91    error (EXIT_FAILURE, errno, _("cannot create link %s to %s"),
92           quote_n (0, argv[optind + 1]), quote_n (1, argv[optind]));
93
94  exit (EXIT_SUCCESS);
95}
96