1 /* $OpenBSD: dirname.c,v 1.6 2001/06/28 04:27:19 pjanzen Exp $ */
4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char rcsid[] = "$OpenBSD: dirname.c,v 1.6 2001/06/28 04:27:19 pjanzen Exp $";
35 #endif /* LIBC_SCCS and not lint */
39 #include <sys/param.h>
45 static char bname[MAXPATHLEN];
46 register const char *endp;
48 /* Empty or NULL string gets treated as "." */
49 if (path == NULL || *path == '\0') {
50 (void)strcpy(bname, ".");
54 /* Strip trailing slashes */
55 endp = path + strlen(path) - 1;
56 while (endp > path && *endp == '/')
59 /* Find the start of the dir */
60 while (endp > path && *endp != '/')
63 /* Either the dir is "/" or there are no slashes */
65 (void)strcpy(bname, *endp == '/' ? "/" : ".");
70 } while (endp > path && *endp == '/');
73 if (endp - path + 2 > sizeof(bname)) {
77 strlcpy(bname, path, endp - path + 2);