1 /*- 2 * Copyright (c) 2005 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sbin/gpt/label.c,v 1.3 2006/10/04 18:20:25 marcel Exp $ 27 * $DragonFly: src/sbin/gpt/label.c,v 1.2 2007/06/17 08:34:59 dillon Exp $ 28 */ 29 30 #include <sys/types.h> 31 32 #include <err.h> 33 #include <stddef.h> 34 #include <stdio.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 #include "map.h" 40 #include "gpt.h" 41 42 static int all; 43 static uuid_t type; 44 static off_t block, size; 45 static unsigned int entry = NOENTRY; 46 static uint8_t *name; 47 48 static void 49 usage_label(void) 50 { 51 const char *common = "<-l label | -f file> device ..."; 52 53 fprintf(stderr, 54 "usage: %s -a %s\n" 55 " %s [-b lba] [-i index] [-s lba] [-t uuid] %s\n", 56 getprogname(), common, getprogname(), common); 57 exit(1); 58 } 59 60 static void 61 label(int fd) 62 { 63 uuid_t uuid; 64 map_t *gpt, *tpg; 65 map_t *tbl, *lbt; 66 map_t *m; 67 struct gpt_hdr *hdr; 68 struct gpt_ent *ent; 69 unsigned int i; 70 71 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 72 if (gpt == NULL) { 73 warnx("%s: error: no primary GPT header; run create or recover", 74 device_name); 75 return; 76 } 77 78 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 79 if (tpg == NULL) { 80 warnx("%s: error: no secondary GPT header; run recover", 81 device_name); 82 return; 83 } 84 85 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 86 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 87 if (tbl == NULL || lbt == NULL) { 88 warnx("%s: error: run recover -- trust me", device_name); 89 return; 90 } 91 92 /* Relabel all matching entries in the map. */ 93 for (m = map_first(); m != NULL; m = m->map_next) { 94 if (m->map_type != MAP_TYPE_GPT_PART || m->map_index == NOENTRY) 95 continue; 96 if (entry != NOENTRY && entry != m->map_index) 97 continue; 98 if (block > 0 && block != m->map_start) 99 continue; 100 if (size > 0 && size != m->map_size) 101 continue; 102 103 i = m->map_index; 104 105 hdr = gpt->map_data; 106 ent = (void*)((char*)tbl->map_data + i * 107 le32toh(hdr->hdr_entsz)); 108 le_uuid_dec(&ent->ent_type, &uuid); 109 if (!uuid_is_nil(&type, NULL) && 110 !uuid_equal(&type, &uuid, NULL)) 111 continue; 112 113 /* Label the primary entry. */ 114 utf8_to_utf16(name, ent->ent_name, 36); 115 116 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 117 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 118 hdr->hdr_crc_self = 0; 119 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 120 121 gpt_write(fd, gpt); 122 gpt_write(fd, tbl); 123 124 hdr = tpg->map_data; 125 ent = (void*)((char*)lbt->map_data + i * 126 le32toh(hdr->hdr_entsz)); 127 128 /* Label the secundary entry. */ 129 utf8_to_utf16(name, ent->ent_name, 36); 130 131 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 132 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 133 hdr->hdr_crc_self = 0; 134 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 135 136 gpt_write(fd, lbt); 137 gpt_write(fd, tpg); 138 139 printf("%ss%u labeled\n", device_name, m->map_index); 140 } 141 } 142 143 static void 144 name_from_file(const char *fn) 145 { 146 FILE *f; 147 char *p; 148 size_t maxlen = 1024; 149 size_t len; 150 151 if (strcmp(fn, "-") != 0) { 152 f = fopen(fn, "r"); 153 if (f == NULL) 154 err(1, "unable to open file %s", fn); 155 } else 156 f = stdin; 157 name = malloc(maxlen); 158 len = fread(name, 1, maxlen - 1, f); 159 if (ferror(f)) 160 err(1, "unable to read label from file %s", fn); 161 if (f != stdin) 162 fclose(f); 163 name[len] = '\0'; 164 /* Only keep the first line, excluding the newline character. */ 165 p = strchr(name, '\n'); 166 if (p != NULL) 167 *p = '\0'; 168 } 169 170 int 171 cmd_label(int argc, char *argv[]) 172 { 173 char *p; 174 int ch, fd; 175 176 /* Get the label options */ 177 while ((ch = getopt(argc, argv, "ab:f:i:l:s:t:")) != -1) { 178 switch(ch) { 179 case 'a': 180 if (all > 0) 181 usage_label(); 182 all = 1; 183 break; 184 case 'b': 185 if (block > 0) 186 usage_label(); 187 block = strtoll(optarg, &p, 10); 188 if (*p != 0 || block < 1) 189 usage_label(); 190 break; 191 case 'f': 192 if (name != NULL) 193 usage_label(); 194 name_from_file(optarg); 195 break; 196 case 'i': 197 if (entry != NOENTRY) 198 usage_label(); 199 entry = strtoul(optarg, &p, 10); 200 if (*p != 0 || entry == NOENTRY) 201 usage_label(); 202 break; 203 case 'l': 204 if (name != NULL) 205 usage_label(); 206 name = strdup(optarg); 207 break; 208 case 's': 209 if (size > 0) 210 usage_label(); 211 size = strtoll(optarg, &p, 10); 212 if (*p != 0 || size < 1) 213 usage_label(); 214 break; 215 case 't': 216 if (!uuid_is_nil(&type, NULL)) 217 usage_label(); 218 if (parse_uuid(optarg, &type) != 0) 219 usage_label(); 220 break; 221 default: 222 usage_label(); 223 } 224 } 225 226 if (!all ^ 227 (block > 0 || entry != NOENTRY || size > 0 || 228 !uuid_is_nil(&type, NULL))) 229 usage_label(); 230 231 if (name == NULL || argc == optind) 232 usage_label(); 233 234 while (optind < argc) { 235 fd = gpt_open(argv[optind++]); 236 if (fd == -1) { 237 warn("unable to open device '%s'", device_name); 238 continue; 239 } 240 241 label(fd); 242 243 gpt_close(fd); 244 } 245 246 return (0); 247 } 248