src/unlink.c

   1 /* unlink utility for GNU.
   2    Copyright (C) 2001, 2002, 2004 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 Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Written by Michael Stone */
  19
  20 /* Implementation overview:
  21
  22    Simply call the system 'unlink' function */
  23
  24 #include <config.h>
  25 #include <stdio.h>
  26 #include <getopt.h>
  27 #include <sys/types.h>
  28 #include <assert.h>
  29
  30 #include "system.h"
  31 #include "error.h"
  32 #include "long-options.h"
  33 #include "quote.h"
  34
  35 /* The official name of this program (e.g., no `g' prefix).  */
  36 #define PROGRAM_NAME "unlink"
  37
  38 #define AUTHORS "Michael Stone"
  39
  40 /* Name this program was run with.  */
  41 char *program_name;
  42
  43 void
  44 usage (int status)
  45 {
  46   if (status != EXIT_SUCCESS)
  47     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  48              program_name);
  49   else
  50     {
  51       printf (_("\
  52 Usage: %s FILE\n\
  53   or:  %s OPTION\n"), program_name, program_name);
  54       fputs (_("Call the unlink function to remove the specified FILE.\n\n"),
  55              stdout);
  56       fputs (HELP_OPTION_DESCRIPTION, stdout);
  57       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  58       printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
  59     }
  60   exit (status);
  61 }
  62
  63 int
  64 main (int argc, char **argv)
  65 {
  66   initialize_main (&argc, &argv);
  67   program_name = argv[0];
  68   setlocale (LC_ALL, "");
  69   bindtextdomain (PACKAGE, LOCALEDIR);
  70   textdomain (PACKAGE);
  71
  72   atexit (close_stdout);
  73
  74   /* Don't recognize --help or --version if POSIXLY_CORRECT is set.  */
  75   if (getenv ("POSIXLY_CORRECT") == NULL)
  76     parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  77                         usage, AUTHORS, (char const *) NULL);
  78
  79   /* The above handles --help and --version.
  80      Since there is no other invocation of getopt, handle `--' here.  */
  81   if (1 < argc && STREQ (argv[1], "--"))
  82     {
  83       --argc;
  84       ++argv;
  85     }
  86
  87   if (argc < 2)
  88     {
  89       error (0, 0, _("too few arguments"));
  90       usage (EXIT_FAILURE);
  91     }
  92
  93   if (2 < argc)
  94     {
  95       error (0, 0, _("too many arguments"));
  96       usage (EXIT_FAILURE);
  97     }
  98
  99   if (unlink (argv[1]) != 0)
 100     error (EXIT_FAILURE, errno, _("cannot unlink %s"), quote (argv[1]));
 101
 102   exit (EXIT_SUCCESS);
 103 }