label.c revision 1.18
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 1.18 2014/09/30 17:59:59 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 #include "gpt_uuid.h" 51 52 static int all; 53 static gpt_uuid_t type; 54 static off_t block, size; 55 static unsigned int entry; 56 static uint8_t *name, *xlabel; 57 58 const char labelmsg1[] = "label -a <-l label | -f file> device ..."; 59 const char labelmsg2[] = "label [-b blocknr] [-i index] [-L label] " 60 "[-s sectors]"; 61 const char labelmsg3[] = " [-t uuid] <-l label | -f file> device ..."; 62 63 __dead static void 64 usage_label(void) 65 { 66 fprintf(stderr, 67 "usage: %s %s\n" 68 " %s %s\n" 69 " %*s %s\n", getprogname(), labelmsg1, 70 getprogname(), labelmsg2, (int)strlen(getprogname()), "", labelmsg3); 71 exit(1); 72 } 73 74 static void 75 label(int fd) 76 { 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 if (!gpt_uuid_is_nil(type) && 128 !gpt_uuid_equal(type, ent->ent_type)) 129 continue; 130 131 /* Label the primary entry. */ 132 utf8_to_utf16(name, ent->ent_name, 36); 133 134 hdr->hdr_crc_table = htole32(crc32(tbl->map_data, 135 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 136 hdr->hdr_crc_self = 0; 137 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 138 139 gpt_write(fd, gpt); 140 gpt_write(fd, tbl); 141 142 hdr = tpg->map_data; 143 ent = (void*)((char*)lbt->map_data + i * 144 le32toh(hdr->hdr_entsz)); 145 146 /* Label the secondary entry. */ 147 utf8_to_utf16(name, ent->ent_name, 36); 148 149 hdr->hdr_crc_table = htole32(crc32(lbt->map_data, 150 le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz))); 151 hdr->hdr_crc_self = 0; 152 hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size))); 153 154 gpt_write(fd, lbt); 155 gpt_write(fd, tpg); 156 157 printf("partition %d on %s labeled %s\n", m->map_index, 158 device_name, name); 159 } 160 } 161 162 static void 163 name_from_file(const char *fn) 164 { 165 FILE *f; 166 char *p; 167 size_t maxlen = 1024; 168 size_t len; 169 170 if (strcmp(fn, "-") != 0) { 171 f = fopen(fn, "r"); 172 if (f == NULL) 173 err(1, "unable to open file %s", fn); 174 } else 175 f = stdin; 176 name = malloc(maxlen); 177 len = fread(name, 1, maxlen - 1, f); 178 if (ferror(f)) 179 err(1, "unable to read label from file %s", fn); 180 if (f != stdin) 181 fclose(f); 182 name[len] = '\0'; 183 /* Only keep the first line, excluding the newline character. */ 184 p = strchr((const char *)name, '\n'); 185 if (p != NULL) 186 *p = '\0'; 187 } 188 189 int 190 cmd_label(int argc, char *argv[]) 191 { 192 char *p; 193 int ch, fd; 194 int64_t human_num; 195 196 /* Get the label options */ 197 while ((ch = getopt(argc, argv, "ab:f:i:L:l:s:t:")) != -1) { 198 switch(ch) { 199 case 'a': 200 if (all > 0) 201 usage_label(); 202 all = 1; 203 break; 204 case 'b': 205 if (block > 0) 206 usage_label(); 207 if (dehumanize_number(optarg, &human_num) < 0) 208 usage_label(); 209 block = human_num; 210 if (block < 1) 211 usage_label(); 212 break; 213 case 'f': 214 if (name != NULL) 215 usage_label(); 216 name_from_file(optarg); 217 break; 218 case 'i': 219 if (entry > 0) 220 usage_label(); 221 entry = strtoul(optarg, &p, 10); 222 if (*p != 0 || entry < 1) 223 usage_label(); 224 break; 225 case 'L': 226 if (xlabel != NULL) 227 usage_label(); 228 xlabel = (uint8_t *)strdup(optarg); 229 break; 230 case 'l': 231 if (name != NULL) 232 usage_label(); 233 name = (uint8_t *)strdup(optarg); 234 break; 235 case 's': 236 if (size > 0) 237 usage_label(); 238 size = strtoll(optarg, &p, 10); 239 if (*p != 0 || size < 1) 240 usage_label(); 241 break; 242 case 't': 243 if (!gpt_uuid_is_nil(type)) 244 usage_label(); 245 if (gpt_uuid_parse(optarg, type) != 0) 246 usage_label(); 247 break; 248 default: 249 usage_label(); 250 } 251 } 252 253 if (!all ^ 254 (block > 0 || entry > 0 || xlabel != NULL || size > 0 || 255 !gpt_uuid_is_nil(type))) 256 usage_label(); 257 258 if (name == NULL || argc == optind) 259 usage_label(); 260 261 while (optind < argc) { 262 fd = gpt_open(argv[optind++]); 263 if (fd == -1) { 264 warn("unable to open device '%s'", device_name); 265 continue; 266 } 267 268 label(fd); 269 270 gpt_close(fd); 271 } 272 273 return (0); 274 } 275
Indexes created Wed Sep 24 05:09:52 GMT 2025