1/* vi: set sw=4 ts=4: */
2/*
3 * Mini dirname function.
4 *
5 * Copyright (C) 2001  Matt Kraai.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <string.h>
23#include "libbb.h"
24
25/* Return a string on the heap containing the directory component of PATH.  */
26
27char *dirname(const char *path)
28{
29	const char *s;
30
31	/* Go to the end of the string.  */
32	s = path + strlen(path) - 1;
33
34	/* Strip off trailing /s (unless it is also the leading /).  */
35	while (path < s && s[0] == '/')
36		s--;
37
38	/* Strip the last component.  */
39	while (path <= s && s[0] != '/')
40		s--;
41
42	while (path < s && s[0] == '/')
43		s--;
44
45	if (s < path)
46		return xstrdup (".");
47	else
48		return xstrndup (path, s - path + 1);
49}
50