1 /* $OpenBSD: basename.c,v 1.14 2005/08/08 08:05:33 espie Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 2004 Todd C. Miller <Todd.Miller (at) 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/basename.c */ 20 21 #include "includes.h" 22 #ifndef HAVE_BASENAME 23 #include <errno.h> 24 #include <string.h> 25 26 char * 27 basename(const char *path) 28 { 29 static char bname[MAXPATHLEN]; 30 size_t len; 31 const char *endp, *startp; 32 33 /* Empty or NULL string gets treated as "." */ 34 if (path == NULL || *path == '\0') { 35 bname[0] = '.'; 36 bname[1] = '\0'; 37 return (bname); 38 } 39 40 /* Strip any trailing slashes */ 41 endp = path + strlen(path) - 1; 42 while (endp > path && *endp == '/') 43 endp--; 44 45 /* All slashes becomes "/" */ 46 if (endp == path && *endp == '/') { 47 bname[0] = '/'; 48 bname[1] = '\0'; 49 return (bname); 50 } 51 52 /* Find the start of the base */ 53 startp = endp; 54 while (startp > path && *(startp - 1) != '/') 55 startp--; 56 57 len = endp - startp + 1; 58 if (len >= sizeof(bname)) { 59 errno = ENAMETOOLONG; 60 return (NULL); 61 } 62 memcpy(bname, startp, len); 63 bname[len] = '\0'; 64 return (bname); 65 } 66 67 #endif /* !defined(HAVE_BASENAME) */ 68
