1 /* $OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $ */
2 /* $FreeBSD: src/lib/libc/gen/dirname.c,v 1.1.2.2 2001/07/23 10:13:04 dd Exp $ */
3 /* $DragonFly: src/lib/libc/gen/dirname.c,v 1.6 2005/04/28 13:45:42 joerg Exp $ */
6 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * $OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $
37 #include <sys/param.h>
40 dirname(const char *path)
42 static char bname[MAXPATHLEN];
45 /* Empty or NULL string gets treated as "." */
46 if (path == NULL || *path == '\0') {
47 strlcpy(bname, ".", sizeof(bname));
51 /* Strip trailing slashes */
52 endp = path + strlen(path) - 1;
53 while (endp > path && *endp == '/')
56 /* Find the start of the dir */
57 while (endp > path && *endp != '/')
60 /* Either the dir is "/" or there are no slashes */
62 strlcpy(bname, *endp == '/' ? "/" : ".", sizeof(bname));
68 } while (endp > path && *endp == '/');
70 if (endp + 2 > path + sizeof(bname)) {
74 memcpy(bname, path, endp - path + 1);
75 bname[endp - path + 1] = '\0';