Line data    Source code

       1             : /* dirname -- strip suffix from file name
       2             : 
       3             :    Copyright (C) 1990-1997, 1999-2002, 2004-2007 Free Software
       4             :    Foundation, Inc.
       5             : 
       6             :    This program is free software: you can redistribute it and/or modify
       7             :    it under the terms of the GNU General Public License as published by
       8             :    the Free Software Foundation, either version 3 of the License, or
       9             :    (at your option) any later version.
      10             : 
      11             :    This program is distributed in the hope that it will be useful,
      12             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :    GNU General Public License for more details.
      15             : 
      16             :    You should have received a copy of the GNU General Public License
      17             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      18             : 
      19             : /* Written by David MacKenzie and Jim Meyering. */
      20             : 
      21             : #include <config.h>
      22             : #include <getopt.h>
      23             : #include <stdio.h>
      24             : #include <sys/types.h>
      25             : 
      26             : #include "system.h"
      27             : #include "long-options.h"
      28             : #include "error.h"
      29             : #include "quote.h"
      30             : 
      31             : /* The official name of this program (e.g., no `g' prefix).  */
      32             : #define PROGRAM_NAME "dirname"
      33             : 
      34             : #define AUTHORS "David MacKenzie", "Jim Meyering"
      35             : 
      36             : /* The name this program was run with. */
      37             : char *program_name;
      38             : 
      39             : void
      40          29 : usage (int status)
      41             : {
      42          29 :   if (status != EXIT_SUCCESS)
      43          27 :     fprintf (stderr, _("Try `%s --help' for more information.\n"),
      44             :              program_name);
      45             :   else
      46             :     {
      47           2 :       printf (_("\
      48             : Usage: %s NAME\n\
      49             :   or:  %s OPTION\n\
      50             : "),
      51             :               program_name, program_name);
      52           2 :       fputs (_("\
      53             : Print NAME with its trailing /component removed; if NAME contains no /'s,\n\
      54             : output `.' (meaning the current directory).\n\
      55             : \n\
      56             : "), stdout);
      57           2 :       fputs (HELP_OPTION_DESCRIPTION, stdout);
      58           2 :       fputs (VERSION_OPTION_DESCRIPTION, stdout);
      59           2 :       printf (_("\
      60             : \n\
      61             : Examples:\n\
      62             :   %s /usr/bin/sort  Output \"/usr/bin\".\n\
      63             :   %s stdio.h        Output \".\".\n\
      64             : "),
      65             :               program_name, program_name);
      66           2 :       emit_bug_reporting_address ();
      67             :     }
      68          29 :   exit (status);
      69             : }
      70             : 
      71             : int
      72          39 : main (int argc, char **argv)
      73             : {
      74             :   static char const dot = '.';
      75             :   char const *result;
      76             :   size_t len;
      77             : 
      78             :   initialize_main (&argc, &argv);
      79          39 :   program_name = argv[0];
      80          39 :   setlocale (LC_ALL, "");
      81             :   bindtextdomain (PACKAGE, LOCALEDIR);
      82             :   textdomain (PACKAGE);
      83             : 
      84          39 :   atexit (close_stdout);
      85             : 
      86          39 :   parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, VERSION,
      87             :                       usage, AUTHORS, (char const *) NULL);
      88          36 :   if (getopt_long (argc, argv, "+", NULL, NULL) != -1)
      89           7 :     usage (EXIT_FAILURE);
      90             : 
      91          29 :   if (argc < optind + 1)
      92             :     {
      93           2 :       error (0, 0, _("missing operand"));
      94           2 :       usage (EXIT_FAILURE);
      95             :     }
      96             : 
      97          27 :   if (optind + 1 < argc)
      98             :     {
      99          18 :       error (0, 0, _("extra operand %s"), quote (argv[optind + 1]));
     100          18 :       usage (EXIT_FAILURE);
     101             :     }
     102             : 
     103           9 :   result = argv[optind];
     104           9 :   len = dir_len (result);
     105             : 
     106           9 :   if (! len)
     107             :     {
     108           5 :       result = &dot;
     109           5 :       len = 1;
     110             :     }
     111             : 
     112           9 :   fwrite (result, 1, len, stdout);
     113           9 :   putchar ('\n');
     114             : 
     115           9 :   exit (EXIT_SUCCESS);
     116             : }