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