src/unlink.c

   1 /* unlink utility for GNU.
   2    Copyright (C) 2001-2022 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 <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Michael Stone */
  18
  19 /* Implementation overview:
  20
  21    Simply call the system 'unlink' function */
  22
  23 #include <config.h>
  24 #include <stdio.h>
  25 #include <sys/types.h>
  26
  27 #include "system.h"
  28 #include "die.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 "unlink"
  35
  36 #define AUTHORS proper_name ("Michael Stone")
  37
  38 void
  39 usage (int status)
  40 {
  41   if (status != EXIT_SUCCESS)
  42     emit_try_help ();
  43   else
  44     {
  45       printf (_("\
  46 Usage: %s FILE\n\
  47   or:  %s OPTION\n"), program_name, program_name);
  48       fputs (_("Call the unlink function to remove the specified FILE.\n\n"),
  49              stdout);
  50       fputs (HELP_OPTION_DESCRIPTION, stdout);
  51       fputs (VERSION_OPTION_DESCRIPTION, stdout);
  52       emit_ancillary_info (PROGRAM_NAME);
  53     }
  54   exit (status);
  55 }
  56
  57 int
  58 main (int argc, char **argv)
  59 {
  60   initialize_main (&argc, &argv);
  61   set_program_name (argv[0]);
  62   setlocale (LC_ALL, "");
  63   bindtextdomain (PACKAGE, LOCALEDIR);
  64   textdomain (PACKAGE);
  65
  66   atexit (close_stdout);
  67
  68   parse_gnu_standard_options_only (argc, argv, PROGRAM_NAME, PACKAGE_NAME,
  69                                    Version, true, usage, AUTHORS,
  70                                    (char const *) NULL);
  71
  72   if (argc < optind + 1)
  73     {
  74       error (0, 0, _("missing operand"));
  75       usage (EXIT_FAILURE);
  76     }
  77
  78   if (optind + 1 < argc)
  79     {
  80       error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
  81       usage (EXIT_FAILURE);
  82     }
  83
  84   if (unlink (argv[optind]) != 0)
  85     die (EXIT_FAILURE, errno, _("cannot unlink %s"), quoteaf (argv[optind]));
  86
  87   return EXIT_SUCCESS;
  88 }