src/unlink.c

   1 /* unlink utility for GNU.
   2    Copyright (C) 2001-2019 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 <getopt.h>
  26 #include <sys/types.h>
  27
  28 #include "system.h"
  29 #include "die.h"
  30 #include "error.h"
  31 #include "long-options.h"
  32 #include "quote.h"
  33
  34 /* The official name of this program (e.g., no 'g' prefix).  */
  35 #define PROGRAM_NAME "unlink"
  36
  37 #define AUTHORS proper_name ("Michael Stone")
  38
  39 static struct option const long_options[] =
  40 {
  41   {NULL, 0, NULL, 0}
  42 };
  43
  44 void
  45 usage (int status)
  46 {
  47   if (status != EXIT_SUCCESS)
  48     emit_try_help ();
  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       emit_ancillary_info (PROGRAM_NAME);
  59     }
  60   exit (status);
  61 }
  62
  63 int
  64 main (int argc, char **argv)
  65 {
  66   initialize_main (&argc, &argv);
  67   set_program_name (argv[0]);
  68   setlocale (LC_ALL, "");
  69   bindtextdomain (PACKAGE, LOCALEDIR);
  70   textdomain (PACKAGE);
  71
  72   atexit (close_stdout);
  73
  74   parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, Version,
  75                       usage, AUTHORS, (char const *) NULL);
  76   if (getopt_long (argc, argv, "", long_options, NULL) != -1)
  77     usage (EXIT_FAILURE);
  78
  79   if (argc < optind + 1)
  80     {
  81       error (0, 0, _("missing operand"));
  82       usage (EXIT_FAILURE);
  83     }
  84
  85   if (optind + 1 < argc)
  86     {
  87       error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
  88       usage (EXIT_FAILURE);
  89     }
  90
  91   if (unlink (argv[optind]) != 0)
  92     die (EXIT_FAILURE, errno, _("cannot unlink %s"), quoteaf (argv[optind]));
  93
  94   return EXIT_SUCCESS;
  95 }