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 27#include <sys/cdefs.h> 28#ifdef __FBSDID 29__FBSDID("$FreeBSD: src/sbin/gpt/label.c,v 1.3 2006/10/04 18:20:25 marcel Exp $"); 30#endif 31#ifdef __RCSID 32__RCSID("$NetBSD: label.c,v 1.7 2009/03/12 22:59:03 dyoung Exp $"); 33#endif 34 35#include <sys/types.h> 36 37#include <err.h> 38#include <stddef.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <string.h> 42#include <unistd.h> 43 44#include "map.h" 45#include "gpt.h" 46 47static int all; 48static uuid_t type; 49static off_t block, size; 50static unsigned int entry; 51static uint8_t *name; 52 53const char labelmsg1[] = "label -a <-l label | -f file> device ..."; 54const char labelmsg2[] = "label [-b lba] [-i index] [-s lba]"; 55const char labelmsg3[] = " [-t uuid] <-l label | -f file> device ..."; 56 57__dead static void 58usage_label(void) 59{ 60 fprintf(stderr, 61 "usage: %s %s\n" 62 " %s %s\n" 63 " %*s %s\n", getprogname(), labelmsg1, 64 getprogname(), labelmsg2, (int)strlen(getprogname()), "", labelmsg3); 65 exit(1); 66} 67 68static void 69label(int fd) 70{ 71 uuid_t uuid; 72 map_t *gpt, *tpg; 73 map_t *tbl, *lbt; 74 map_t *m; 75 struct gpt_hdr *hdr; 76 struct gpt_ent *ent; 77 unsigned int i; 78 79 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 80 if (gpt == NULL) { 81 warnx("%s: error: no primary GPT header; run create or recover", 82 device_name); 83 return; 84 } 85 86 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 87 if (tpg == NULL) { 88 warnx("%s: error: no secondary GPT header; run recover", 89 device_name); 90 return; 91 } 92 93 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 94 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 95 if (tbl == NULL || lbt == NULL) { 96 warnx("%s: error: run recover -- trust me", device_name); 97 return; 98 } 99 100 /* Relabel all matching entries in the map. */ 101 for (m = map_first(); m != NULL; m = m->map_next) { 102 if (m->map_type != MAP_TYPE_GPT_PART || m->map_index < 1) 103 continue; 104 if (entry > 0 && entry != m->map_index) 105 continue; 106 if (block > 0 && block != m->map_start) 107 continue; 108 if (size > 0 && size != m->map_size) 109 continue; 110 111 i = m->map_index - 1; 112 113 hdr = gpt->map_data; 114 ent = (void*)((char*)tbl->map_data + i * 115 le32toh(hdr->hdr_entsz)); 116 le_uuid_dec(&ent->ent_type, &uuid); 117 if (!uuid_is_nil(&type, NULL) && 118 !uuid_equal(&type, &uuid, NULL)) 119 continue; 120 121 /* Label the primary entry. */ 122 utf8_to_utf16(name, ent->ent_name, 36); 123 124 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 125 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 126 hdr->hdr_crc_self = 0; 127 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 128 129 gpt_write(fd, gpt); 130 gpt_write(fd, tbl); 131 132 hdr = tpg->map_data; 133 ent = (void*)((char*)lbt->map_data + i * 134 le32toh(hdr->hdr_entsz)); 135 136 /* Label the secundary entry. */ 137 utf8_to_utf16(name, ent->ent_name, 36); 138 139 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 140 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 141 hdr->hdr_crc_self = 0; 142 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 143 144 gpt_write(fd, lbt); 145 gpt_write(fd, tpg); 146 147#ifdef __FreeBSD__ 148 printf("%sp%u labeled\n", device_name, m->map_index); 149#endif 150#ifdef __NetBSD__ 151 printf("partition %d on %s labeled %s\n", m->map_index, 152 device_name, name); 153#endif 154 } 155} 156 157static void 158name_from_file(const char *fn) 159{ 160 FILE *f; 161 char *p; 162 size_t maxlen = 1024; 163 size_t len; 164 165 if (strcmp(fn, "-") != 0) { 166 f = fopen(fn, "r"); 167 if (f == NULL) 168 err(1, "unable to open file %s", fn); 169 } else 170 f = stdin; 171 name = malloc(maxlen); 172 len = fread(name, 1, maxlen - 1, f); 173 if (ferror(f)) 174 err(1, "unable to read label from file %s", fn); 175 if (f != stdin) 176 fclose(f); 177 name[len] = '\0'; 178 /* Only keep the first line, excluding the newline character. */ 179 p = strchr((const char *)name, '\n'); 180 if (p != NULL) 181 *p = '\0'; 182} 183 184int 185cmd_label(int argc, char *argv[]) 186{ 187 char *p; 188 int ch, fd; 189 190 /* Get the label options */ 191 while ((ch = getopt(argc, argv, "ab:f:i:l:s:t:")) != -1) { 192 switch(ch) { 193 case 'a': 194 if (all > 0) 195 usage_label(); 196 all = 1; 197 break; 198 case 'b': 199 if (block > 0) 200 usage_label(); 201 block = strtoll(optarg, &p, 10); 202 if (*p != 0 || block < 1) 203 usage_label(); 204 break; 205 case 'f': 206 if (name != NULL) 207 usage_label(); 208 name_from_file(optarg); 209 break; 210 case 'i': 211 if (entry > 0) 212 usage_label(); 213 entry = strtoul(optarg, &p, 10); 214 if (*p != 0 || entry < 1) 215 usage_label(); 216 break; 217 case 'l': 218 if (name != NULL) 219 usage_label(); 220 name = (uint8_t *)strdup(optarg); 221 break; 222 case 's': 223 if (size > 0) 224 usage_label(); 225 size = strtoll(optarg, &p, 10); 226 if (*p != 0 || size < 1) 227 usage_label(); 228 break; 229 case 't': 230 if (!uuid_is_nil(&type, NULL)) 231 usage_label(); 232 if (parse_uuid(optarg, &type) != 0) 233 usage_label(); 234 break; 235 default: 236 usage_label(); 237 } 238 } 239 240 if (!all ^ 241 (block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL))) 242 usage_label(); 243 244 if (name == NULL || argc == optind) 245 usage_label(); 246 247 while (optind < argc) { 248 fd = gpt_open(argv[optind++]); 249 if (fd == -1) { 250 warn("unable to open device '%s'", device_name); 251 continue; 252 } 253 254 label(fd); 255 256 gpt_close(fd); 257 } 258 259 return (0); 260} 261