unlink.c

/* unlink utility for GNU.
   Copyright (C) 2001-2002 Free Software Foundation, Inc.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
/* Written by Michael Stone */
 
/* Implementation overview:
 
   Simply call the system 'unlink' function */
 
#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include <assert.h>
 
#include "system.h"
#include "error.h"
#include "long-options.h"
#include "quote.h"
 
/* The official name of this program (e.g., no `g' prefix).  */
#define PROGRAM_NAME "unlink"
 
#define AUTHORS "Michael Stone"
 
/* Name this program was run with.  */
char *program_name;
 
void
usage (int status)
{
  if (status != 0)
    fprintf (stderr, _("Try `%s --help' for more information.\n"),
         program_name);
  else
    {
      printf (_("\
Usage: %s FILE\n\
  or:  %s OPTION\n"), program_name, program_name);
      fputs (_("Call the unlink function to remove the specified FILE.\n\n"),
         stdout);
      fputs (HELP_OPTION_DESCRIPTION, stdout);
      fputs (VERSION_OPTION_DESCRIPTION, stdout);
      printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
    }
  exit (status);
}
 
int
main (int argc, char **argv)
{
  program_name = argv[0];
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);
 
  atexit (close_stdout);
 
  /* Don't recognize --help or --version if POSIXLY_CORRECT is set.  */
  if (getenv ("POSIXLY_CORRECT") == NULL)
    parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
            AUTHORS, usage);
 
  /* The above handles --help and --version.
     Since there is no other invocation of getopt, handle `--' here.  */
  if (1 < argc && STREQ (argv[1], "--"))
    {
      --argc;
      ++argv;
    }
 
  if (argc < 2)
    {
      error (0, 0, _("too few arguments"));
      usage (EXIT_FAILURE);
    }
 
  if (2 < argc)
    {
      error (0, 0, _("too many arguments"));
      usage (EXIT_FAILURE);
    }
 
  if (unlink (argv[1]) != 0)
    error (EXIT_FAILURE, errno, _("cannot unlink %s"), quote (argv[1]));
 
  exit (EXIT_SUCCESS);
}