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2c06c99b | 1 | /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */ |
6a9b3198 | 2 | |
3 | /* | |
2c06c99b | 4 | * Copyright (c) 1997, 2004 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 | |
2c06c99b | 19 | /* OPENBSD ORIGINAL: lib/libc/gen/basename.c */ |
20 | ||
0fff78ff | 21 | #include "includes.h" |
22 | #ifndef HAVE_BASENAME | |
6a9b3198 | 23 | |
6a9b3198 | 24 | char * |
25 | basename(const char *path) | |
26 | { | |
27 | static char bname[MAXPATHLEN]; | |
2c06c99b | 28 | size_t len; |
29 | const char *endp, *startp; | |
6a9b3198 | 30 | |
31 | /* Empty or NULL string gets treated as "." */ | |
32 | if (path == NULL || *path == '\0') { | |
2c06c99b | 33 | bname[0] = '.'; |
34 | bname[1] = '\0'; | |
35 | return (bname); | |
6a9b3198 | 36 | } |
37 | ||
2c06c99b | 38 | /* Strip any trailing slashes */ |
6a9b3198 | 39 | endp = path + strlen(path) - 1; |
40 | while (endp > path && *endp == '/') | |
41 | endp--; | |
42 | ||
2c06c99b | 43 | /* All slashes becomes "/" */ |
6a9b3198 | 44 | if (endp == path && *endp == '/') { |
2c06c99b | 45 | bname[0] = '/'; |
46 | bname[1] = '\0'; | |
47 | return (bname); | |
6a9b3198 | 48 | } |
49 | ||
50 | /* Find the start of the base */ | |
51 | startp = endp; | |
52 | while (startp > path && *(startp - 1) != '/') | |
53 | startp--; | |
54 | ||
2c06c99b | 55 | len = endp - startp + 1; |
56 | if (len >= sizeof(bname)) { | |
6a9b3198 | 57 | errno = ENAMETOOLONG; |
2c06c99b | 58 | return (NULL); |
6a9b3198 | 59 | } |
2c06c99b | 60 | memcpy(bname, startp, len); |
61 | bname[len] = '\0'; | |
62 | return (bname); | |
6a9b3198 | 63 | } |
64 | ||
65 | #endif /* !defined(HAVE_BASENAME) */ |