src/dirname.c

   1 /* dirname -- strip filename suffix from pathname
   2    Copyright (C) 1990-1997, 1999, 2000, 2001 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 David MacKenzie and Jim Meyering. */
  19
  20 #include <config.h>
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23
  24 #include "system.h"
  25 #include "long-options.h"
  26 #include "error.h"
  27 #include "dirname.h"
  28 #include "closeout.h"
  29 #include "xalloc.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 and Jim Meyering"
  35
  36 void strip_trailing_slashes ();
  37
  38 /* The name this program was run with. */
  39 char *program_name;
  40
  41 void
  42 usage (int status)
  43 {
  44   if (status != 0)
  45     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  46              program_name);
  47   else
  48     {
  49       printf (_("\
  50 Usage: %s NAME\n\
  51   or:  %s OPTION\n\
  52 "),
  53               program_name, program_name);
  54       printf (_("\
  55 Print NAME with its trailing /component removed; if NAME contains no /'s,\n\
  56 output `.' (meaning the current directory).\n\
  57 \n\
  58   --help      display this help and exit\n\
  59   --version   output version information and exit\n\
  60 "));
  61       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
  62     }
  63   exit (status);
  64 }
  65
  66 int
  67 main (int argc, char **argv)
  68 {
  69   char *result;
  70
  71   program_name = argv[0];
  72   setlocale (LC_ALL, "");
  73   bindtextdomain (PACKAGE, LOCALEDIR);
  74   textdomain (PACKAGE);
  75
  76   atexit (close_stdout);
  77
  78   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
  79                       AUTHORS, usage);
  80   /* The above handles --help and --version.
  81      Since there is no other invocation of getopt, handle `--' here.  */
  82   if (argc > 1 && STREQ (argv[1], "--"))
  83     {
  84       --argc;
  85       ++argv;
  86     }
  87
  88   if (argc != 2)
  89     {
  90       error (0, 0, argc < 2 ? _("too few arguments")
  91              : _("too many arguments"));
  92       usage (1);
  93     }
  94
  95   result = dir_name (argv[1]);
  96   if (result == NULL)
  97     xalloc_die ();
  98   puts (result);
  99   free (result);
 100
 101   exit (0);
 102 }