1 /* OPENBSD ORIGINAL: lib/libc/gen/basename.c */ 2 3 /* $OpenBSD: basename.c,v 1.11 2003/06/17 21:56:23 millert Exp $ */ 4 5 /* 6 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include "includes.h" 22 #ifndef HAVE_BASENAME 23 24 #ifndef lint 25 static char rcsid[] = "$OpenBSD: basename.c,v 1.11 2003/06/17 21:56:23 millert Exp $"; 26 #endif /* not lint */ 27 28 char * 29 basename(const char *path) 30 { 31 static char bname[MAXPATHLEN]; 32 register const char *endp, *startp; 33 34 /* Empty or NULL string gets treated as "." */ 35 if (path == NULL || *path == '\0') { 36 (void)strlcpy(bname, ".", sizeof bname); 37 return(bname); 38 } 39 40 /* Strip trailing slashes */ 41 endp = path + strlen(path) - 1; 42 while (endp > path && *endp == '/') 43 endp--; 44 45 /* All slashes become "/" */ 46 if (endp == path && *endp == '/') { 47 (void)strlcpy(bname, "/", sizeof bname); 48 return(bname); 49 } 50 51 /* Find the start of the base */ 52 startp = endp; 53 while (startp > path && *(startp - 1) != '/') 54 startp--; 55 56 if (endp - startp + 2 > sizeof(bname)) { 57 errno = ENAMETOOLONG; 58 return(NULL); 59 } 60 strlcpy(bname, startp, endp - startp + 2); 61 return(bname); 62 } 63 64 #endif /* !defined(HAVE_BASENAME) */ 65