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0fff78ff | 1 | /* $OpenBSD: basename.c,v 1.11 2003/06/17 21:56:23 millert Exp $ */ |
6a9b3198 | 2 | |
3 | /* | |
4 | * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> | |
6a9b3198 | 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. | |
6a9b3198 | 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. | |
6a9b3198 | 17 | */ |
6a9b3198 | 18 | |
0fff78ff | 19 | #include "includes.h" |
20 | #ifndef HAVE_BASENAME | |
6a9b3198 | 21 | |
22 | #ifndef lint | |
0fff78ff | 23 | static char rcsid[] = "$OpenBSD: basename.c,v 1.11 2003/06/17 21:56:23 millert Exp $"; |
6a9b3198 | 24 | #endif /* not lint */ |
25 | ||
26 | char * | |
27 | basename(const char *path) | |
28 | { | |
29 | static char bname[MAXPATHLEN]; | |
30 | register const char *endp, *startp; | |
31 | ||
32 | /* Empty or NULL string gets treated as "." */ | |
33 | if (path == NULL || *path == '\0') { | |
34 | (void)strlcpy(bname, ".", sizeof bname); | |
35 | return(bname); | |
36 | } | |
37 | ||
38 | /* Strip trailing slashes */ | |
39 | endp = path + strlen(path) - 1; | |
40 | while (endp > path && *endp == '/') | |
41 | endp--; | |
42 | ||
43 | /* All slashes become "/" */ | |
44 | if (endp == path && *endp == '/') { | |
45 | (void)strlcpy(bname, "/", sizeof bname); | |
46 | return(bname); | |
47 | } | |
48 | ||
49 | /* Find the start of the base */ | |
50 | startp = endp; | |
51 | while (startp > path && *(startp - 1) != '/') | |
52 | startp--; | |
53 | ||
54 | if (endp - startp + 2 > sizeof(bname)) { | |
55 | errno = ENAMETOOLONG; | |
56 | return(NULL); | |
57 | } | |
58 | strlcpy(bname, startp, endp - startp + 2); | |
59 | return(bname); | |
60 | } | |
61 | ||
62 | #endif /* !defined(HAVE_BASENAME) */ |