| | 1 | /* $OpenBSD: dirname.c,v 1.13 2005/08/08 08:05:33 espie Exp $ */ |
| | 2 | |
| | 3 | /* |
| | 4 | * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller@courtesan.com> |
| | 5 | * |
| | 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. |
| | 9 | * |
| | 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. |
| | 17 | */ |
| | 18 | |
| | 19 | /* OPENBSD ORIGINAL: lib/libc/gen/dirname.c */ |
| | 20 | |
| | 21 | #include "includes.h" |
| | 22 | #ifndef HAVE_DIRNAME |
| | 23 | |
| | 24 | #include <errno.h> |
| | 25 | #include <string.h> |
| | 26 | #include <sys/param.h> |
| | 27 | |
| | 28 | char * |
| | 29 | dirname(const char *path) |
| | 30 | { |
| | 31 | static char dname[MAXPATHLEN]; |
| | 32 | size_t len; |
| | 33 | const char *endp; |
| | 34 | |
| | 35 | /* Empty or NULL string gets treated as "." */ |
| | 36 | if (path == NULL || *path == '\0') { |
| | 37 | dname[0] = '.'; |
| | 38 | dname[1] = '\0'; |
| | 39 | return (dname); |
| | 40 | } |
| | 41 | |
| | 42 | /* Strip any trailing slashes */ |
| | 43 | endp = path + strlen(path) - 1; |
| | 44 | while (endp > path && *endp == '/') |
| | 45 | endp--; |
| | 46 | |
| | 47 | /* Find the start of the dir */ |
| | 48 | while (endp > path && *endp != '/') |
| | 49 | endp--; |
| | 50 | |
| | 51 | /* Either the dir is "/" or there are no slashes */ |
| | 52 | if (endp == path) { |
| | 53 | dname[0] = *endp == '/' ? '/' : '.'; |
| | 54 | dname[1] = '\0'; |
| | 55 | return (dname); |
| | 56 | } else { |
| | 57 | /* Move forward past the separating slashes */ |
| | 58 | do { |
| | 59 | endp--; |
| | 60 | } while (endp > path && *endp == '/'); |
| | 61 | } |
| | 62 | |
| | 63 | len = endp - path + 1; |
| | 64 | if (len >= sizeof(dname)) { |
| | 65 | errno = ENAMETOOLONG; |
| | 66 | return (NULL); |
| | 67 | } |
| | 68 | memcpy(dname, path, len); |
| | 69 | dname[len] = '\0'; |
| | 70 | return (dname); |
| | 71 | } |
| | 72 | #endif |
andersk / openssh.git / blame_incremental