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540d72c3 | 1 | /* OPENBSD ORIGINAL: lib/libc/gen/basename.c */ |
2 | ||
7cac2b65 | 3 | /* $OpenBSD: basename.c,v 1.11 2003/06/17 21:56:23 millert Exp $ */ |
c20db291 | 4 | |
5 | /* | |
6 | * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> | |
c20db291 | 7 | * |
7cac2b65 | 8 | * Permission to use, copy, modify, and distribute this software for any |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
c20db291 | 11 | * |
7cac2b65 | 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
c20db291 | 19 | */ |
c20db291 | 20 | |
7cac2b65 | 21 | #include "includes.h" |
22 | #ifndef HAVE_BASENAME | |
c20db291 | 23 | |
24 | #ifndef lint | |
7cac2b65 | 25 | static char rcsid[] = "$OpenBSD: basename.c,v 1.11 2003/06/17 21:56:23 millert Exp $"; |
c20db291 | 26 | #endif /* not lint */ |
27 | ||
28 | char * | |
29 | basename(const char *path) | |
30 | { | |
31 | static char bname[MAXPATHLEN]; | |
32 | register const char *endp, *startp; | |
33 | ||
34 | /* Empty or NULL string gets treated as "." */ | |
35 | if (path == NULL || *path == '\0') { | |
36 | (void)strlcpy(bname, ".", sizeof bname); | |
37 | return(bname); | |
38 | } | |
39 | ||
40 | /* Strip trailing slashes */ | |
41 | endp = path + strlen(path) - 1; | |
42 | while (endp > path && *endp == '/') | |
43 | endp--; | |
44 | ||
45 | /* All slashes become "/" */ | |
46 | if (endp == path && *endp == '/') { | |
47 | (void)strlcpy(bname, "/", sizeof bname); | |
48 | return(bname); | |
49 | } | |
50 | ||
51 | /* Find the start of the base */ | |
52 | startp = endp; | |
53 | while (startp > path && *(startp - 1) != '/') | |
54 | startp--; | |
55 | ||
56 | if (endp - startp + 2 > sizeof(bname)) { | |
57 | errno = ENAMETOOLONG; | |
58 | return(NULL); | |
59 | } | |
60 | strlcpy(bname, startp, endp - startp + 2); | |
61 | return(bname); | |
62 | } | |
63 | ||
64 | #endif /* !defined(HAVE_BASENAME) */ |