1 /* $OpenBSD: dirname.c,v 1.13 2005/08/08 08:05:33 espie Exp $ */
4 * Copyright (c) 1997, 2004 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.
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD$");
26 #include <sys/param.h>
29 dirname(const char *path)
31 static char *dname = NULL;
36 dname = (char *)malloc(MAXPATHLEN);
41 /* Empty or NULL string gets treated as "." */
42 if (path == NULL || *path == '\0') {
48 /* Strip any trailing slashes */
49 endp = path + strlen(path) - 1;
50 while (endp > path && *endp == '/')
53 /* Find the start of the dir */
54 while (endp > path && *endp != '/')
57 /* Either the dir is "/" or there are no slashes */
59 dname[0] = *endp == '/' ? '/' : '.';
63 /* Move forward past the separating slashes */
66 } while (endp > path && *endp == '/');
69 len = endp - path + 1;
70 if (len >= MAXPATHLEN) {
74 memcpy(dname, path, len);