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) */ 74