busybox/coreutils/basename.c

/* vi: set sw=4 ts=4: */
/*
 * Mini basename implementation for busybox
 *
 * Copyright (C) 1999,2000 by Lineo, inc.
 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
 *
 * 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 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include "internal.h"
#include <stdio.h>

const char *basename_usage="basename FILE [SUFFIX]\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
	"\nStrips directory path and suffixes from FILE.\n"
	"If specified, also removes any trailing SUFFIX.\n"
#endif
;


extern int basename_main(int argc, char **argv)
{
	int m, n;
	char *s, *s1;

	if ((argc < 2) || (**(argv + 1) == '-')) {
		usage(basename_usage);
	}

	argv++;

	s1=*argv+strlen(*argv)-1;
	while (s1 && *s1 == '/') {
		*s1 = '\0';
		s1--;
	}
	s = strrchr(*argv, '/');
	if (s==NULL) s=*argv;
	else s++;

	if (argc>2) {
		argv++;
		n = strlen(*argv);
		m = strlen(s);
		if (m>=n && strncmp(s+m-n, *argv, n)==0)
			s[m-n] = '\0';
	}
	printf("%s\n", s);
	exit(TRUE);
}