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 1.14 2013/11/28 01:37:14 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 printf("partition %d on %s labeled %s\n", m->map_index, 148 device_name, name); 149 } 150 } 151 152 static void 153 name_from_file(const char *fn) 154 { 155 FILE *f; 156 char *p; 157 size_t maxlen = 1024; 158 size_t len; 159 160 if (strcmp(fn, "-") != 0) { 161 f = fopen(fn, "r"); 162 if (f == NULL) 163 err(1, "unable to open file %s", fn); 164 } else 165 f = stdin; 166 name = malloc(maxlen); 167 len = fread(name, 1, maxlen - 1, f); 168 if (ferror(f)) 169 err(1, "unable to read label from file %s", fn); 170 if (f != stdin) 171 fclose(f); 172 name[len] = '\0'; 173 /* Only keep the first line, excluding the newline character. */ 174 p = strchr((const char *)name, '\n'); 175 if (p != NULL) 176 *p = '\0'; 177 } 178 179 int 180 cmd_label(int argc, char *argv[]) 181 { 182 char *p; 183 int ch, fd; 184 int64_t human_num; 185 186 /* Get the label options */ 187 while ((ch = getopt(argc, argv, "ab:f:i:l:s:t:")) != -1) { 188 switch(ch) { 189 case 'a': 190 if (all > 0) 191 usage_label(); 192 all = 1; 193 break; 194 case 'b': 195 if (block > 0) 196 usage_label(); 197 if (dehumanize_number(optarg, &human_num) < 0) 198 usage_label(); 199 block = human_num; 200 if (block < 1) 201 usage_label(); 202 break; 203 case 'f': 204 if (name != NULL) 205 usage_label(); 206 name_from_file(optarg); 207 break; 208 case 'i': 209 if (entry > 0) 210 usage_label(); 211 entry = strtoul(optarg, &p, 10); 212 if (*p != 0 || entry < 1) 213 usage_label(); 214 break; 215 case 'l': 216 if (name != NULL) 217 usage_label(); 218 name = (uint8_t *)strdup(optarg); 219 break; 220 case 's': 221 if (size > 0) 222 usage_label(); 223 size = strtoll(optarg, &p, 10); 224 if (*p != 0 || size < 1) 225 usage_label(); 226 break; 227 case 't': 228 if (!uuid_is_nil(&type, NULL)) 229 usage_label(); 230 if (parse_uuid(optarg, &type) != 0) 231 usage_label(); 232 break; 233 default: 234 usage_label(); 235 } 236 } 237 238 if (!all ^ 239 (block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL))) 240 usage_label(); 241 242 if (name == NULL || argc == optind) 243 usage_label(); 244 245 while (optind < argc) { 246 fd = gpt_open(argv[optind++]); 247 if (fd == -1) { 248 warn("unable to open device '%s'", device_name); 249 continue; 250 } 251 252 label(fd); 253 254 gpt_close(fd); 255 } 256 257 return (0); 258 } 259