Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / crypto / openssh / openbsd-compat / dirname.c
CommitLineData
984263bc
MD
1/* $OpenBSD: dirname.c,v 1.7 2002/05/24 21:22:37 deraadt Exp $ */
2
3/*
4 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
17 *
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.
1de703da
MD
28 *
29 * $OpenBSD: dirname.c,v 1.7 2002/05/24 21:22:37 deraadt Exp $
984263bc
MD
30 */
31
32#include "includes.h"
33#ifndef HAVE_DIRNAME
34
984263bc
MD
35#include <errno.h>
36#include <string.h>
37#include <sys/param.h>
38
39char *
40dirname(path)
41 const char *path;
42{
43 static char bname[MAXPATHLEN];
44 register const char *endp;
45
46 /* Empty or NULL string gets treated as "." */
47 if (path == NULL || *path == '\0') {
48 (void)strlcpy(bname, ".", sizeof bname);
49 return(bname);
50 }
51
52 /* Strip trailing slashes */
53 endp = path + strlen(path) - 1;
54 while (endp > path && *endp == '/')
55 endp--;
56
57 /* Find the start of the dir */
58 while (endp > path && *endp != '/')
59 endp--;
60
61 /* Either the dir is "/" or there are no slashes */
62 if (endp == path) {
63 (void)strlcpy(bname, *endp == '/' ? "/" : ".", sizeof bname);
64 return(bname);
65 } else {
66 do {
67 endp--;
68 } while (endp > path && *endp == '/');
69 }
70
71 if (endp - path + 2 > sizeof(bname)) {
72 errno = ENAMETOOLONG;
73 return(NULL);
74 }
75 strlcpy(bname, path, endp - path + 2);
76 return(bname);
77}
78#endif