src/basename.c

   1 /* basename -- strip directory and suffix from filenames
   2    Copyright (C) 90,91,92,93,94,95,96,1997 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 /* Usage: basename name [suffix]
  19    NAME is a pathname; SUFFIX is a suffix to strip from it.
  20
  21    basename /usr/foo/lossage/functions.l
  22    => functions.l
  23    basename /usr/foo/lossage/functions.l .l
  24    => functions
  25    basename functions.lisp p
  26    => functions.lis */
  27
  28 #include <config.h>
  29 #include <stdio.h>
  30 #include <sys/types.h>
  31
  32 #include "system.h"
  33 #include "long-options.h"
  34 #include "error.h"
  35
  36 char *base_name ();
  37 void strip_trailing_slashes ();
  38
  39 /* The name this program was run with. */
  40 char *program_name;
  41
  42 static void
  43 usage (int status)
  44 {
  45   if (status != 0)
  46     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  47              program_name);
  48   else
  49     {
  50       printf (_("\
  51 Usage: %s NAME [SUFFIX]\n\
  52   or:  %s OPTION\n\
  53 "),
  54               program_name, program_name);
  55       printf (_("\
  56 Print NAME with any leading directory components removed.\n\
  57 If specified, also remove a trailing SUFFIX.\n\
  58 \n\
  59   --help      display this help and exit\n\
  60   --version   output version information and exit\n\
  61 "));
  62       puts (_("\nReport bugs to <sh-utils-bugs@gnu.org>."));
  63     }
  64   exit (status);
  65 }
  66
  67 /* Remove SUFFIX from the end of NAME if it is there, unless NAME
  68    consists entirely of SUFFIX. */
  69
  70 static void
  71 remove_suffix (char *name, const char *suffix)
  72 {
  73   char *np;
  74   const char *sp;
  75
  76   np = name + strlen (name);
  77   sp = suffix + strlen (suffix);
  78
  79   while (np > name && sp > suffix)
  80     if (*--np != *--sp)
  81       return;
  82   if (np > name)
  83     *np = '\0';
  84 }
  85
  86 int
  87 main (int argc, char **argv)
  88 {
  89   char *name;
  90
  91   program_name = argv[0];
  92   setlocale (LC_ALL, "");
  93   bindtextdomain (PACKAGE, LOCALEDIR);
  94   textdomain (PACKAGE);
  95
  96   parse_long_options (argc, argv, "basename", GNU_PACKAGE, VERSION, usage);
  97
  98   if (argc == 1 || argc > 3)
  99     {
 100       error (0, 0, (argc == 1 ? _("too few arguments")
 101                     : _("too many arguments")));
 102       usage (1);
 103     }
 104
 105   strip_trailing_slashes (argv[1]);
 106
 107   name = base_name (argv[1]);
 108
 109   if (argc == 3)
 110     remove_suffix (name, argv[2]);
 111
 112   puts (name);
 113
 114   exit (0);
 115 }