5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * CDDL HEADER START
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * The contents of this file are subject to the terms of the
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Common Development and Distribution License (the "License").
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * You may not use this file except in compliance with the License.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * or http://www.opensolaris.org/os/licensing.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * See the License for the specific language governing permissions
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * and limitations under the License.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * When distributing Covered Code, include this CDDL HEADER in each
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * If applicable, add the following below this CDDL HEADER, with the
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * fields enclosed by brackets "[]" replaced with your own identifying
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * information: Portions Copyright [yyyy] [name of copyright owner]
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * CDDL HEADER END
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/*
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland * Use is subject to license terms.
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland/* All Rights Reserved */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#include <string.h>
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#define isdot(x) ((x[0] == '.') && (!x[1] || (x[1] == '/')))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland#define isdotdot(x) ((x[0] == '.') && (x[1] == '.') && \
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland (!x[2] || (x[2] == '/')))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandvoid
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandcanonize(char *file)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland{
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland char *pt, *last;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland int level;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland /* remove references such as "./" and "../" and "//" */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland for (pt = file; *pt; /* void */) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if (isdot(pt))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland (void) strcpy(pt, pt[1] ? pt+2 : pt+1);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland else if (isdotdot(pt)) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland level = 0;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland last = pt;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland do {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland level++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland last += 2;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if (*last)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland last++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland } while (isdotdot(last));
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland --pt; /* point to previous '/' */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland while (level--) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if (pt <= file)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland return;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland while ((*--pt != '/') && (pt > file))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland ;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if (*pt == '/')
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland (void) strcpy(pt, last);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland } else {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland while (*pt && (*pt != '/'))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if (*pt == '/') {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland while (pt[1] == '/')
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland (void) strcpy(pt, pt+1);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if ((--pt > file) && (*pt == '/'))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *pt = '\0';
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland}
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandvoid
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterlandcanonize_slashes(char *file)
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland{
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland char *pt;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland /* remove references such as "//" */
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland for (pt = file; *pt; /* void */) {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland while (*pt && (*pt != '/'))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if (*pt == '/') {
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland while (pt[1] == '/')
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland (void) strcpy(pt, pt+1);
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland pt++;
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland }
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland if ((--pt > file) && (*pt == '/'))
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland *pt = '\0';
5c51f1241dbbdf2656d0e10011981411ed0c9673Moriah Waterland}