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0fff78ff | 1 | /* $OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $ */ |
3c0ef626 | 2 | |
3 | /* | |
4 | * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> | |
3c0ef626 | 5 | * |
0fff78ff | 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. | |
3c0ef626 | 9 | * |
0fff78ff | 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. | |
3c0ef626 | 17 | */ |
18 | ||
19 | #include "includes.h" | |
20 | #ifndef HAVE_DIRNAME | |
21 | ||
0fff78ff | 22 | #ifndef lint |
23 | static char rcsid[] = "$OpenBSD: dirname.c,v 1.10 2003/06/17 21:56:23 millert Exp $"; | |
24 | #endif /* not lint */ | |
3c0ef626 | 25 | |
26 | #include <errno.h> | |
27 | #include <string.h> | |
28 | #include <sys/param.h> | |
29 | ||
30 | char * | |
0fff78ff | 31 | dirname(const char *path) |
3c0ef626 | 32 | { |
33 | static char bname[MAXPATHLEN]; | |
34 | register const char *endp; | |
35 | ||
36 | /* Empty or NULL string gets treated as "." */ | |
37 | if (path == NULL || *path == '\0') { | |
41b2f314 | 38 | (void)strlcpy(bname, ".", sizeof bname); |
3c0ef626 | 39 | return(bname); |
40 | } | |
41 | ||
42 | /* Strip trailing slashes */ | |
43 | endp = path + strlen(path) - 1; | |
44 | while (endp > path && *endp == '/') | |
45 | endp--; | |
46 | ||
47 | /* Find the start of the dir */ | |
48 | while (endp > path && *endp != '/') | |
49 | endp--; | |
50 | ||
51 | /* Either the dir is "/" or there are no slashes */ | |
52 | if (endp == path) { | |
41b2f314 | 53 | (void)strlcpy(bname, *endp == '/' ? "/" : ".", sizeof bname); |
3c0ef626 | 54 | return(bname); |
55 | } else { | |
56 | do { | |
57 | endp--; | |
58 | } while (endp > path && *endp == '/'); | |
59 | } | |
60 | ||
e9a17296 | 61 | if (endp - path + 2 > sizeof(bname)) { |
3c0ef626 | 62 | errno = ENAMETOOLONG; |
63 | return(NULL); | |
64 | } | |
65 | strlcpy(bname, path, endp - path + 2); | |
66 | return(bname); | |
67 | } | |
68 | #endif |