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7dfb4a82 | 1 | /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */ |
2d0c443a | 2 | |
3 | /* | |
7dfb4a82 | 4 | * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com> |
2d0c443a | 5 | * |
510a42ce | 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. | |
2d0c443a | 9 | * |
510a42ce | 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. | |
2d0c443a | 17 | */ |
2d0c443a | 18 | |
f6d4fb87 | 19 | /* OPENBSD ORIGINAL: lib/libc/gen/basename.c */ |
20 | ||
510a42ce | 21 | #include "includes.h" |
22 | #ifndef HAVE_BASENAME | |
48a7de26 | 23 | #include <errno.h> |
e204f3ee | 24 | #include <string.h> |
2d0c443a | 25 | |
2d0c443a | 26 | char * |
27 | basename(const char *path) | |
28 | { | |
29 | static char bname[MAXPATHLEN]; | |
7dfb4a82 | 30 | size_t len; |
31 | const char *endp, *startp; | |
2d0c443a | 32 | |
33 | /* Empty or NULL string gets treated as "." */ | |
34 | if (path == NULL || *path == '\0') { | |
7dfb4a82 | 35 | bname[0] = '.'; |
36 | bname[1] = '\0'; | |
37 | return (bname); | |
2d0c443a | 38 | } |
39 | ||
7dfb4a82 | 40 | /* Strip any trailing slashes */ |
2d0c443a | 41 | endp = path + strlen(path) - 1; |
42 | while (endp > path && *endp == '/') | |
43 | endp--; | |
44 | ||
7dfb4a82 | 45 | /* All slashes becomes "/" */ |
2d0c443a | 46 | if (endp == path && *endp == '/') { |
7dfb4a82 | 47 | bname[0] = '/'; |
48 | bname[1] = '\0'; | |
49 | return (bname); | |
2d0c443a | 50 | } |
51 | ||
52 | /* Find the start of the base */ | |
53 | startp = endp; | |
54 | while (startp > path && *(startp - 1) != '/') | |
55 | startp--; | |
56 | ||
7dfb4a82 | 57 | len = endp - startp + 1; |
58 | if (len >= sizeof(bname)) { | |
2d0c443a | 59 | errno = ENAMETOOLONG; |
7dfb4a82 | 60 | return (NULL); |
2d0c443a | 61 | } |
7dfb4a82 | 62 | memcpy(bname, startp, len); |
63 | bname[len] = '\0'; | |
64 | return (bname); | |
2d0c443a | 65 | } |
66 | ||
67 | #endif /* !defined(HAVE_BASENAME) */ |