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1 | /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */ | |
2 | ||
3 | /* | |
4 | * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com> | |
5 | * | |
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. | |
9 | * | |
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. | |
17 | */ | |
18 | ||
19 | /* OPENBSD ORIGINAL: lib/libc/gen/basename.c */ | |
20 | ||
21 | #include "includes.h" | |
22 | #ifndef HAVE_BASENAME | |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | ||
26 | char * | |
27 | basename(const char *path) | |
28 | { | |
29 | static char bname[MAXPATHLEN]; | |
30 | size_t len; | |
31 | const char *endp, *startp; | |
32 | ||
33 | /* Empty or NULL string gets treated as "." */ | |
34 | if (path == NULL || *path == '\0') { | |
35 | bname[0] = '.'; | |
36 | bname[1] = '\0'; | |
37 | return (bname); | |
38 | } | |
39 | ||
40 | /* Strip any trailing slashes */ | |
41 | endp = path + strlen(path) - 1; | |
42 | while (endp > path && *endp == '/') | |
43 | endp--; | |
44 | ||
45 | /* All slashes becomes "/" */ | |
46 | if (endp == path && *endp == '/') { | |
47 | bname[0] = '/'; | |
48 | bname[1] = '\0'; | |
49 | return (bname); | |
50 | } | |
51 | ||
52 | /* Find the start of the base */ | |
53 | startp = endp; | |
54 | while (startp > path && *(startp - 1) != '/') | |
55 | startp--; | |
56 | ||
57 | len = endp - startp + 1; | |
58 | if (len >= sizeof(bname)) { | |
59 | errno = ENAMETOOLONG; | |
60 | return (NULL); | |
61 | } | |
62 | memcpy(bname, startp, len); | |
63 | bname[len] = '\0'; | |
64 | return (bname); | |
65 | } | |
66 | ||
67 | #endif /* !defined(HAVE_BASENAME) */ |