1 /* $OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $ */
4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 static char rcsid[] = "$OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $";
28 #include <sys/param.h>
31 dirname(const char *path)
33 static char bname[MAXPATHLEN];
34 register const char *endp;
36 /* Empty or NULL string gets treated as "." */
37 if (path == NULL || *path == '\0') {
38 (void)strlcpy(bname, ".", sizeof bname);
42 /* Strip trailing slashes */
43 endp = path + strlen(path) - 1;
44 while (endp > path && *endp == '/')
47 /* Find the start of the dir */
48 while (endp > path && *endp != '/')
51 /* Either the dir is "/" or there are no slashes */
53 (void)strlcpy(bname, *endp == '/' ? "/" : ".", sizeof bname);
58 } while (endp > path && *endp == '/');
61 if (endp - path + 2 > sizeof(bname)) {
65 strlcpy(bname, path, endp - path + 2);