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