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/* basename -- strip directory and suffix from file names
Copyright (C) 1990-1997, 1999-2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Usage: basename name [suffix]
NAME is a file name; SUFFIX is a suffix to strip from it.
basename /usr/foo/lossage/functions.l
=> functions.l
basename /usr/foo/lossage/functions.l .l
=> functions
basename functions.lisp p
=> functions.lis */
#include <config.h>
#include <getopt.h>
#include <stdio.h>
#include <sys/types.h>
#include "system.h"
#include "long-options.h"
#include "error.h"
#include "quote.h"
/* The official name of this program (e.g., no `g' prefix). */
#define PROGRAM_NAME "basename"
#define AUTHORS proper_name ("David MacKenzie")
void
usage (int status)
{
if (status != EXIT_SUCCESS)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
printf (_("\
Usage: %s NAME [SUFFIX]\n\
or: %s OPTION\n\
"),
program_name, program_name);
fputs (_("\
Print NAME with any leading directory components removed.\n\
If specified, also remove a trailing SUFFIX.\n\
\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
printf (_("\
\n\
Examples:\n\
%s /usr/bin/sort Output \"sort\".\n\
%s include/stdio.h .h Output \"stdio\".\n\
"),
program_name, program_name);
emit_ancillary_info ();
}
exit (status);
}
/* Remove SUFFIX from the end of NAME if it is there, unless NAME
consists entirely of SUFFIX. */
static void
remove_suffix (char *name, const char *suffix)
{
char *np;
const char *sp;
np = name + strlen (name);
sp = suffix + strlen (suffix);
while (np > name && sp > suffix)
if (*--np != *--sp)
return;
if (np > name)
*np = '\0';
}
int
main (int argc, char **argv)
{
char *name;
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, Version,
usage, AUTHORS, (char const *) NULL);
if (getopt_long (argc, argv, "+", NULL, NULL) != -1)
usage (EXIT_FAILURE);
if (argc < optind + 1)
{
error (0, 0, _("missing operand"));
usage (EXIT_FAILURE);
}
if (optind + 2 < argc)
{
error (0, 0, _("extra operand %s"), quote (argv[optind + 2]));
usage (EXIT_FAILURE);
}
name = base_name (argv[optind]);
strip_trailing_slashes (name);
/* Per POSIX, `basename // /' must return `//' on platforms with
distinct //. On platforms with drive letters, this generalizes
to making `basename c: :' return `c:'. This rule is captured by
skipping suffix stripping if base_name returned an absolute path
or a drive letter (only possible if name is a file-system
root). */
if (argc == optind + 2 && IS_RELATIVE_FILE_NAME (name)
&& ! FILE_SYSTEM_PREFIX_LEN (name))
remove_suffix (name, argv[optind + 1]);
puts (name);
free (name);
exit (EXIT_SUCCESS);
}
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