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 1.12 2013/11/22 04:21:02 jnemeth 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 47 static int all; 48 static uuid_t type; 49 static off_t block, size; 50 static unsigned int entry; 51 static uint8_t *name; 52 53 const char labelmsg1[] = "label -a <-l label | -f file> device ..."; 54 const char labelmsg2[] = "label [-b blocknr] [-i index] [-s sectors]"; 55 const char labelmsg3[] = " [-t uuid] <-l label | -f file> device ..."; 56 57 __dead static void 58 usage_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 68 static void 69 label(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 secondary 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 } 156 157 static void 158 name_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 } 183 184 int 185 cmd_label(int argc, char *argv[]) 186 { 187 char *p; 188 int ch, fd; 189 int64_t human_num; 190 191 /* Get the label options */ 192 while ((ch = getopt(argc, argv, "ab:f:i:l:s:t:")) != -1) { 193 switch(ch) { 194 case 'a': 195 if (all > 0) 196 usage_label(); 197 all = 1; 198 break; 199 case 'b': 200 if (block > 0) 201 usage_label(); 202 if (dehumanize_number(optarg, &human_num) < 0) 203 usage_label(); 204 block = human_num; 205 break; 206 case 'f': 207 if (name != NULL) 208 usage_label(); 209 name_from_file(optarg); 210 break; 211 case 'i': 212 if (entry > 0) 213 usage_label(); 214 entry = strtoul(optarg, &p, 10); 215 if (*p != 0 || entry < 1) 216 usage_label(); 217 break; 218 case 'l': 219 if (name != NULL) 220 usage_label(); 221 name = (uint8_t *)strdup(optarg); 222 break; 223 case 's': 224 if (size > 0) 225 usage_label(); 226 size = strtoll(optarg, &p, 10); 227 if (*p != 0 || size < 1) 228 usage_label(); 229 break; 230 case 't': 231 if (!uuid_is_nil(&type, NULL)) 232 usage_label(); 233 if (parse_uuid(optarg, &type) != 0) 234 usage_label(); 235 break; 236 default: 237 usage_label(); 238 } 239 } 240 241 if (!all ^ 242 (block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL))) 243 usage_label(); 244 245 if (name == NULL || argc == optind) 246 usage_label(); 247 248 while (optind < argc) { 249 fd = gpt_open(argv[optind++]); 250 if (fd == -1) { 251 warn("unable to open device '%s'", device_name); 252 continue; 253 } 254 255 label(fd); 256 257 gpt_close(fd); 258 } 259 260 return (0); 261 } 262