| Damien Miller | 8d8168a | 2003-02-24 12:55:55 +1100 | [diff] [blame] | 1 | /* $OpenBSD: basename.c,v 1.8 2002/06/09 05:03:59 deraadt Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| 19 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| 20 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| 21 | * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | #include "includes.h" |
| 30 | |
| 31 | #if !defined(HAVE_BASENAME) |
| 32 | |
| 33 | #ifndef lint |
| 34 | static char rcsid[] = "$OpenBSD: basename.c,v 1.8 2002/06/09 05:03:59 deraadt Exp $"; |
| 35 | #endif /* not lint */ |
| 36 | |
| 37 | char * |
| 38 | basename(const char *path) |
| 39 | { |
| 40 | static char bname[MAXPATHLEN]; |
| 41 | register const char *endp, *startp; |
| 42 | |
| 43 | /* Empty or NULL string gets treated as "." */ |
| 44 | if (path == NULL || *path == '\0') { |
| 45 | (void)strlcpy(bname, ".", sizeof bname); |
| 46 | return(bname); |
| 47 | } |
| 48 | |
| 49 | /* Strip trailing slashes */ |
| 50 | endp = path + strlen(path) - 1; |
| 51 | while (endp > path && *endp == '/') |
| 52 | endp--; |
| 53 | |
| 54 | /* All slashes become "/" */ |
| 55 | if (endp == path && *endp == '/') { |
| 56 | (void)strlcpy(bname, "/", sizeof bname); |
| 57 | return(bname); |
| 58 | } |
| 59 | |
| 60 | /* Find the start of the base */ |
| 61 | startp = endp; |
| 62 | while (startp > path && *(startp - 1) != '/') |
| 63 | startp--; |
| 64 | |
| 65 | if (endp - startp + 2 > sizeof(bname)) { |
| 66 | errno = ENAMETOOLONG; |
| 67 | return(NULL); |
| 68 | } |
| 69 | strlcpy(bname, startp, endp - startp + 2); |
| 70 | return(bname); |
| 71 | } |
| 72 | |
| 73 | #endif /* !defined(HAVE_BASENAME) */ |