1*5c51f124SMoriah Waterland /* 2*5c51f124SMoriah Waterland * CDDL HEADER START 3*5c51f124SMoriah Waterland * 4*5c51f124SMoriah Waterland * The contents of this file are subject to the terms of the 5*5c51f124SMoriah Waterland * Common Development and Distribution License (the "License"). 6*5c51f124SMoriah Waterland * You may not use this file except in compliance with the License. 7*5c51f124SMoriah Waterland * 8*5c51f124SMoriah Waterland * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5c51f124SMoriah Waterland * or http://www.opensolaris.org/os/licensing. 10*5c51f124SMoriah Waterland * See the License for the specific language governing permissions 11*5c51f124SMoriah Waterland * and limitations under the License. 12*5c51f124SMoriah Waterland * 13*5c51f124SMoriah Waterland * When distributing Covered Code, include this CDDL HEADER in each 14*5c51f124SMoriah Waterland * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5c51f124SMoriah Waterland * If applicable, add the following below this CDDL HEADER, with the 16*5c51f124SMoriah Waterland * fields enclosed by brackets "[]" replaced with your own identifying 17*5c51f124SMoriah Waterland * information: Portions Copyright [yyyy] [name of copyright owner] 18*5c51f124SMoriah Waterland * 19*5c51f124SMoriah Waterland * CDDL HEADER END 20*5c51f124SMoriah Waterland */ 21*5c51f124SMoriah Waterland 22*5c51f124SMoriah Waterland /* 23*5c51f124SMoriah Waterland * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24*5c51f124SMoriah Waterland * Use is subject to license terms. 25*5c51f124SMoriah Waterland */ 26*5c51f124SMoriah Waterland 27*5c51f124SMoriah Waterland /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*5c51f124SMoriah Waterland /* All Rights Reserved */ 29*5c51f124SMoriah Waterland 30*5c51f124SMoriah Waterland 31*5c51f124SMoriah Waterland #include <string.h> 32*5c51f124SMoriah Waterland 33*5c51f124SMoriah Waterland #define isdot(x) ((x[0] == '.') && (!x[1] || (x[1] == '/'))) 34*5c51f124SMoriah Waterland #define isdotdot(x) ((x[0] == '.') && (x[1] == '.') && \ 35*5c51f124SMoriah Waterland (!x[2] || (x[2] == '/'))) 36*5c51f124SMoriah Waterland 37*5c51f124SMoriah Waterland void 38*5c51f124SMoriah Waterland canonize(char *file) 39*5c51f124SMoriah Waterland { 40*5c51f124SMoriah Waterland char *pt, *last; 41*5c51f124SMoriah Waterland int level; 42*5c51f124SMoriah Waterland 43*5c51f124SMoriah Waterland /* remove references such as "./" and "../" and "//" */ 44*5c51f124SMoriah Waterland for (pt = file; *pt; /* void */) { 45*5c51f124SMoriah Waterland if (isdot(pt)) 46*5c51f124SMoriah Waterland (void) strcpy(pt, pt[1] ? pt+2 : pt+1); 47*5c51f124SMoriah Waterland else if (isdotdot(pt)) { 48*5c51f124SMoriah Waterland level = 0; 49*5c51f124SMoriah Waterland last = pt; 50*5c51f124SMoriah Waterland do { 51*5c51f124SMoriah Waterland level++; 52*5c51f124SMoriah Waterland last += 2; 53*5c51f124SMoriah Waterland if (*last) 54*5c51f124SMoriah Waterland last++; 55*5c51f124SMoriah Waterland } while (isdotdot(last)); 56*5c51f124SMoriah Waterland --pt; /* point to previous '/' */ 57*5c51f124SMoriah Waterland while (level--) { 58*5c51f124SMoriah Waterland if (pt <= file) 59*5c51f124SMoriah Waterland return; 60*5c51f124SMoriah Waterland while ((*--pt != '/') && (pt > file)) 61*5c51f124SMoriah Waterland ; 62*5c51f124SMoriah Waterland } 63*5c51f124SMoriah Waterland if (*pt == '/') 64*5c51f124SMoriah Waterland pt++; 65*5c51f124SMoriah Waterland (void) strcpy(pt, last); 66*5c51f124SMoriah Waterland } else { 67*5c51f124SMoriah Waterland while (*pt && (*pt != '/')) 68*5c51f124SMoriah Waterland pt++; 69*5c51f124SMoriah Waterland if (*pt == '/') { 70*5c51f124SMoriah Waterland while (pt[1] == '/') 71*5c51f124SMoriah Waterland (void) strcpy(pt, pt+1); 72*5c51f124SMoriah Waterland pt++; 73*5c51f124SMoriah Waterland } 74*5c51f124SMoriah Waterland } 75*5c51f124SMoriah Waterland } 76*5c51f124SMoriah Waterland if ((--pt > file) && (*pt == '/')) 77*5c51f124SMoriah Waterland *pt = '\0'; 78*5c51f124SMoriah Waterland } 79*5c51f124SMoriah Waterland 80*5c51f124SMoriah Waterland void 81*5c51f124SMoriah Waterland canonize_slashes(char *file) 82*5c51f124SMoriah Waterland { 83*5c51f124SMoriah Waterland char *pt; 84*5c51f124SMoriah Waterland 85*5c51f124SMoriah Waterland /* remove references such as "//" */ 86*5c51f124SMoriah Waterland for (pt = file; *pt; /* void */) { 87*5c51f124SMoriah Waterland while (*pt && (*pt != '/')) 88*5c51f124SMoriah Waterland pt++; 89*5c51f124SMoriah Waterland if (*pt == '/') { 90*5c51f124SMoriah Waterland while (pt[1] == '/') 91*5c51f124SMoriah Waterland (void) strcpy(pt, pt+1); 92*5c51f124SMoriah Waterland pt++; 93*5c51f124SMoriah Waterland } 94*5c51f124SMoriah Waterland } 95*5c51f124SMoriah Waterland if ((--pt > file) && (*pt == '/')) 96*5c51f124SMoriah Waterland *pt = '\0'; 97*5c51f124SMoriah Waterland } 98