/* $OpenBSD: dirname.c,v 1.7 2002/05/24 21:22:37 deraadt Exp $ */ /* * Copyright (c) 1997 Todd C. Miller * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "includes.h" #ifndef HAVE_DIRNAME #if defined(LIBC_SCCS) && !defined(lint) static char rcsid[] = "$OpenBSD: dirname.c,v 1.7 2002/05/24 21:22:37 deraadt Exp $"; #endif /* LIBC_SCCS and not lint */ #include #include #include char * dirname(path) const char *path; { static char bname[MAXPATHLEN]; register const char *endp; /* Empty or NULL string gets treated as "." */ if (path == NULL || *path == '\0') { (void)strlcpy(bname, ".", sizeof bname); return(bname); } /* Strip trailing slashes */ endp = path + strlen(path) - 1; while (endp > path && *endp == '/') endp--; /* Find the start of the dir */ while (endp > path && *endp != '/') endp--; /* Either the dir is "/" or there are no slashes */ if (endp == path) { (void)strlcpy(bname, *endp == '/' ? "/" : ".", sizeof bname); return(bname); } else { do { endp--; } while (endp > path && *endp == '/'); } if (endp - path + 2 > sizeof(bname)) { errno = ENAMETOOLONG; return(NULL); } strlcpy(bname, path, endp - path + 2); return(bname); } #endif #pragma ident "%Z%%M% %I% %E% SMI"