label.c revision 1.16
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 #if HAVE_NBTOOL_CONFIG_H 28 #include "nbtool_config.h" 29 #endif 30 31 #include <sys/cdefs.h> 32 #ifdef __FBSDID 33 __FBSDID("$FreeBSD: src/sbin/gpt/label.c,v 1.3 2006/10/04 18:20:25 marcel Exp $"); 34 #endif 35 #ifdef __RCSID 36 __RCSID("$NetBSD: label.c,v 1.16 2014/09/29 20:28:57 christos Exp $"); 37 #endif 38 39 #include <sys/types.h> 40 41 #include <err.h> 42 #include <stddef.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "map.h" 49 #include "gpt.h" 50 51 static int all; 52 static uuid_t type; 53 static off_t block, size; 54 static unsigned int entry; 55 static uint8_t *name, *xlabel; 56 57 const char labelmsg1[] = "label -a <-l label | -f file> device ..."; 58 const char labelmsg2[] = "label [-b blocknr] [-i index] [-L label] " 59 "[-s sectors]"; 60 const char labelmsg3[] = " [-t uuid] <-l label | -f file> device ..."; 61 62 __dead static void 63 usage_label(void) 64 { 65 fprintf(stderr, 66 "usage: %s %s\n" 67 " %s %s\n" 68 " %*s %s\n", getprogname(), labelmsg1, 69 getprogname(), labelmsg2, (int)strlen(getprogname()), "", labelmsg3); 70 exit(1); 71 } 72 73 static void 74 label(int fd) 75 { 76 uuid_t uuid; 77 map_t *gpt, *tpg; 78 map_t *tbl, *lbt; 79 map_t *m; 80 struct gpt_hdr *hdr; 81 struct gpt_ent *ent; 82 unsigned int i; 83 84 gpt = map_find(MAP_TYPE_PRI_GPT_HDR); 85 if (gpt == NULL) { 86 warnx("%s: error: no primary GPT header; run create or recover", 87 device_name); 88 return; 89 } 90 91 tpg = map_find(MAP_TYPE_SEC_GPT_HDR); 92 if (tpg == NULL) { 93 warnx("%s: error: no secondary GPT header; run recover", 94 device_name); 95 return; 96 } 97 98 tbl = map_find(MAP_TYPE_PRI_GPT_TBL); 99 lbt = map_find(MAP_TYPE_SEC_GPT_TBL); 100 if (tbl == NULL || lbt == NULL) { 101 warnx("%s: error: run recover -- trust me", device_name); 102 return; 103 } 104 105 /* Relabel all matching entries in the map. */ 106 for (m = map_first(); m != NULL; m = m->map_next) { 107 if (m->map_type != MAP_TYPE_GPT_PART || m->map_index < 1) 108 continue; 109 if (entry > 0 && entry != m->map_index) 110 continue; 111 if (block > 0 && block != m->map_start) 112 continue; 113 if (size > 0 && size != m->map_size) 114 continue; 115 116 i = m->map_index - 1; 117 118 hdr = gpt->map_data; 119 ent = (void*)((char*)tbl->map_data + i * 120 le32toh(hdr->hdr_entsz)); 121 122 if (xlabel != NULL) 123 if (strcmp((char *)xlabel, 124 (char *)utf16_to_utf8(ent->ent_name)) != 0) 125 continue; 126 127 le_uuid_dec(ent->ent_type, &uuid); 128 if (!uuid_is_nil(&type, NULL) && 129 !uuid_equal(&type, &uuid, NULL)) 130 continue; 131 132 /* Label the primary entry. */ 133 utf8_to_utf16(name, ent->ent_name, 36); 134 135 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 136 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 137 hdr->hdr_crc_self = 0; 138 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 139 140 gpt_write(fd, gpt); 141 gpt_write(fd, tbl); 142 143 hdr = tpg->map_data; 144 ent = (void*)((char*)lbt->map_data + i * 145 le32toh(hdr->hdr_entsz)); 146 147 /* Label the secondary entry. */ 148 utf8_to_utf16(name, ent->ent_name, 36); 149 150 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 151 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 152 hdr->hdr_crc_self = 0; 153 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 154 155 gpt_write(fd, lbt); 156 gpt_write(fd, tpg); 157 158 printf("partition %d on %s labeled %s\n", m->map_index, 159 device_name, name); 160 } 161 } 162 163 static void 164 name_from_file(const char *fn) 165 { 166 FILE *f; 167 char *p; 168 size_t maxlen = 1024; 169 size_t len; 170 171 if (strcmp(fn, "-") != 0) { 172 f = fopen(fn, "r"); 173 if (f == NULL) 174 err(1, "unable to open file %s", fn); 175 } else 176 f = stdin; 177 name = malloc(maxlen); 178 len = fread(name, 1, maxlen - 1, f); 179 if (ferror(f)) 180 err(1, "unable to read label from file %s", fn); 181 if (f != stdin) 182 fclose(f); 183 name[len] = '\0'; 184 /* Only keep the first line, excluding the newline character. */ 185 p = strchr((const char *)name, '\n'); 186 if (p != NULL) 187 *p = '\0'; 188 } 189 190 int 191 cmd_label(int argc, char *argv[]) 192 { 193 char *p; 194 int ch, fd; 195 int64_t human_num; 196 197 /* Get the label options */ 198 while ((ch = getopt(argc, argv, "ab:f:i:L:l:s:t:")) != -1) { 199 switch(ch) { 200 case 'a': 201 if (all > 0) 202 usage_label(); 203 all = 1; 204 break; 205 case 'b': 206 if (block > 0) 207 usage_label(); 208 if (dehumanize_number(optarg, &human_num) < 0) 209 usage_label(); 210 block = human_num; 211 if (block < 1) 212 usage_label(); 213 break; 214 case 'f': 215 if (name != NULL) 216 usage_label(); 217 name_from_file(optarg); 218 break; 219 case 'i': 220 if (entry > 0) 221 usage_label(); 222 entry = strtoul(optarg, &p, 10); 223 if (*p != 0 || entry < 1) 224 usage_label(); 225 break; 226 case 'L': 227 if (xlabel != NULL) 228 usage_label(); 229 xlabel = (uint8_t *)strdup(optarg); 230 break; 231 case 'l': 232 if (name != NULL) 233 usage_label(); 234 name = (uint8_t *)strdup(optarg); 235 break; 236 case 's': 237 if (size > 0) 238 usage_label(); 239 size = strtoll(optarg, &p, 10); 240 if (*p != 0 || size < 1) 241 usage_label(); 242 break; 243 case 't': 244 if (!uuid_is_nil(&type, NULL)) 245 usage_label(); 246 if (parse_uuid(optarg, &type) != 0) 247 usage_label(); 248 break; 249 default: 250 usage_label(); 251 } 252 } 253 254 if (!all ^ 255 (block > 0 || entry > 0 || xlabel != NULL || size > 0 || 256 !uuid_is_nil(&type, NULL))) 257 usage_label(); 258 259 if (name == NULL || argc == optind) 260 usage_label(); 261 262 while (optind < argc) { 263 fd = gpt_open(argv[optind++]); 264 if (fd == -1) { 265 warn("unable to open device '%s'", device_name); 266 continue; 267 } 268 269 label(fd); 270 271 gpt_close(fd); 272 } 273 274 return (0); 275 } 276
Indexes created Wed Sep 24 05:09:52 GMT 2025