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 (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 27 28 /* 29 * System includes 30 */ 31 32 #include <stdio.h> 33 #include <limits.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <libgen.h> 37 #include <errno.h> 38 #include <string.h> 39 #include <fcntl.h> 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 #include <signal.h> 43 #include <assert.h> 44 #include <locale.h> 45 #include <libintl.h> 46 47 /* 48 * local includes 49 */ 50 51 #include "instzones_lib.h" 52 #include "zones_strings.h" 53 54 #define isdot(x) ((x[0] == '.') && (!x[1] || (x[1] == '/'))) 55 #define isdotdot(x) ((x[0] == '.') && (x[1] == '.') && \ 56 (!x[2] || (x[2] == '/'))) 57 58 /* 59 * ***************************************************************************** 60 * global external (public) functions 61 * ***************************************************************************** 62 */ 63 64 /* 65 * Name: z_make_zone_root 66 * Description: Given its zonepath, generate a string representing the 67 * mountpoint of where the root path for a nonglobal zone is 68 * mounted. The zone is mounted using 'zoneadm', which mounts 69 * the zone's filesystems wrt <zonepath>/lu/a 70 * Arguments: zone_path - non-NULL pointer to string representing zonepath 71 * Returns: char * - pointer to string representing zonepath of zone 72 * NULL - if zone_path is NULL. 73 * Notes: The string returned is in static storage and should not be 74 * free()ed by the caller. 75 */ 76 char * 77 z_make_zone_root(char *zone_path) 78 { 79 static char zone_root_buf[MAXPATHLEN]; 80 81 if (zone_path == NULL) 82 return (NULL); 83 84 (void) snprintf(zone_root_buf, MAXPATHLEN, "%s%slu/a", zone_path, 85 (zone_path[0] != '\0' && 86 zone_path[strlen(zone_path) - 1] == '/') ? "" : "/"); 87 88 return (zone_root_buf); 89 } 90 91 void 92 z_path_canonize(char *a_file) 93 { 94 char *pt; 95 char *last; 96 int level; 97 98 /* remove references such as "./" and "../" and "//" */ 99 for (pt = a_file; *pt; /* void */) { 100 if (isdot(pt)) { 101 (void) strcpy(pt, pt[1] ? pt+2 : pt+1); 102 } else if (isdotdot(pt)) { 103 level = 0; 104 last = pt; 105 do { 106 level++; 107 last += 2; 108 if (*last) { 109 last++; 110 } 111 } while (isdotdot(last)); 112 --pt; /* point to previous '/' */ 113 while (level--) { 114 if (pt <= a_file) { 115 return; 116 } 117 while ((*--pt != '/') && (pt > a_file)) 118 ; 119 } 120 if (*pt == '/') { 121 pt++; 122 } 123 (void) strcpy(pt, last); 124 } else { 125 while (*pt && (*pt != '/')) { 126 pt++; 127 } 128 if (*pt == '/') { 129 while (pt[1] == '/') { 130 (void) strcpy(pt, pt+1); 131 } 132 pt++; 133 } 134 } 135 } 136 137 if ((--pt > a_file) && (*pt == '/')) { 138 *pt = '\0'; 139 } 140 } 141 142 void 143 z_canoninplace(char *src) 144 { 145 char *dst; 146 char *src_start; 147 148 /* keep a ptr to the beginning of the src string */ 149 src_start = src; 150 151 dst = src; 152 while (*src) { 153 if (*src == '/') { 154 *dst++ = '/'; 155 while (*src == '/') 156 src++; 157 } else 158 *dst++ = *src++; 159 } 160 161 /* 162 * remove any trailing slashes, unless the whole string is just "/". 163 * If the whole string is "/" (i.e. if the last '/' cahr in dst 164 * in the beginning of the original string), just terminate it 165 * and return "/". 166 */ 167 if ((*(dst - 1) == '/') && ((dst - 1) != src_start)) 168 dst--; 169 *dst = '\0'; 170 } 171