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/* basename -- strip directory and suffix from filenames
Copyright (C) 1990, 1991 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 2, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Usage: basename name [suffix]
NAME is a pathname; 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 <stdio.h>
#include <sys/types.h>
#include <getopt.h>
#include "version.h"
#include "system.h"
char *basename ();
void strip_trailing_slashes ();
static void remove_suffix ();
/* The name this program was run with. */
char *program_name;
/* If non-zero, display usage information and exit. */
static int show_help;
/* If non-zero, print the version on standard error. */
static int show_version;
static struct option const long_options[] =
{
{"help", no_argument, &show_help, 1},
{"version", no_argument, &show_version, 1},
{0, 0, 0, 0}
};
static void
usage ()
{
fprintf (stderr, "Usage: %s [{--help,--version}] name [suffix]\n",
program_name);
exit (1);
}
void
main (argc, argv)
int argc;
char **argv;
{
char *name;
int c;
program_name = argv[0];
while ((c = getopt_long (argc, argv, "", long_options, (int *) 0)) != EOF)
{
switch (c)
{
case 0:
break;
default:
usage ();
}
}
if (show_version)
{
printf ("%s\n", version_string);
exit (0);
}
if (show_help)
usage ();
if (argc - optind == 0 || argc - optind > 2)
usage ();
strip_trailing_slashes (argv[optind]);
name = basename (argv[optind]);
if (argc == 3)
remove_suffix (name, argv[optind + 1]);
puts (name);
exit (0);
}
/* Remove SUFFIX from the end of NAME if it is there, unless NAME
consists entirely of SUFFIX. */
static void
remove_suffix (name, suffix)
register char *name, *suffix;
{
register char *np, *sp;
np = name + strlen (name);
sp = suffix + strlen (suffix);
while (np > name && sp > suffix)
if (*--np != *--sp)
return;
if (np > name)
*np = '\0';
}
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