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 /* OPENBSD ORIGINAL: lib/libc/gen/dirname.c */
26 #include <sys/param.h>
29 dirname(const char *path)
31 static char dname[MAXPATHLEN];
35 /* Empty or NULL string gets treated as "." */
36 if (path == NULL || *path == '\0') {
42 /* Strip any 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 dname[0] = *endp == '/' ? '/' : '.';
57 /* Move forward past the separating slashes */
60 } while (endp > path && *endp == '/');
63 len = endp - path + 1;
64 if (len >= sizeof(dname)) {
68 memcpy(dname, path, len);