| File: | 3rdparty/vboot/cgpt/cgpt_common.c |
| Warning: | line 509, column 9 Value stored to 'code_point_ready' is never read |
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| 1 | /* Copyright 2010 The ChromiumOS Authors |
| 2 | * Use of this source code is governed by a BSD-style license that can be |
| 3 | * found in the LICENSE file. |
| 4 | * |
| 5 | * Utility for ChromeOS-specific GPT partitions, Please see corresponding .c |
| 6 | * files for more details. |
| 7 | */ |
| 8 | |
| 9 | #include <errno(*__errno_location ()).h> |
| 10 | #include <fcntl.h> |
| 11 | #include <getopt.h> |
| 12 | #if !defined(HAVE_MACOS) && !defined(__FreeBSD__) && !defined(__OpenBSD__) |
| 13 | #include <linux1/major.h> |
| 14 | #include <mtd/mtd-user.h> |
| 15 | #endif |
| 16 | #include <stdarg.h> |
| 17 | #include <stdint.h> |
| 18 | #include <stdio.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <sys/ioctl.h> |
| 22 | #include <sys/mount.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <unistd.h> |
| 26 | |
| 27 | #include "cgpt.h" |
| 28 | #include "cgptlib_internal.h" |
| 29 | #include "crc32.h" |
| 30 | #include "vboot_host.h" |
| 31 | |
| 32 | static const char kErrorTag[] = "ERROR"; |
| 33 | static const char kWarningTag[] = "WARNING"; |
| 34 | |
| 35 | static void LogToStderr(const char *tag, const char *format, va_list ap) { |
| 36 | fprintf(stderrstderr, "%s: ", tag); |
| 37 | vfprintf(stderrstderr, format, ap); |
| 38 | } |
| 39 | |
| 40 | void Error(const char *format, ...) { |
| 41 | va_list ap; |
| 42 | va_start(ap, format)__builtin_va_start(ap, format); |
| 43 | LogToStderr(kErrorTag, format, ap); |
| 44 | va_end(ap)__builtin_va_end(ap); |
| 45 | } |
| 46 | |
| 47 | void Warning(const char *format, ...) { |
| 48 | va_list ap; |
| 49 | va_start(ap, format)__builtin_va_start(ap, format); |
| 50 | LogToStderr(kWarningTag, format, ap); |
| 51 | va_end(ap)__builtin_va_end(ap); |
| 52 | } |
| 53 | |
| 54 | int check_int_parse(char option, const char *buf) { |
| 55 | if (!*optarg || (buf && *buf)) { |
| 56 | Error("invalid argument to -%c: \"%s\"\n", option, optarg); |
| 57 | return 1; |
| 58 | } |
| 59 | return 0; |
| 60 | } |
| 61 | |
| 62 | int check_int_limit(char option, int val, int low, int high) { |
| 63 | if (val < low || val > high) { |
| 64 | Error("value for -%c must be between %d and %d", option, low, high); |
| 65 | return 1; |
| 66 | } |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | int CheckValid(const struct drive *drive) { |
| 71 | if ((drive->gpt.valid_headers != MASK_BOTH) || |
| 72 | (drive->gpt.valid_entries != MASK_BOTH)) { |
| 73 | Warning("One of the GPT headers/entries is invalid\n\n"); |
| 74 | return CGPT_FAILED; |
| 75 | } |
| 76 | return CGPT_OK; |
| 77 | } |
| 78 | |
| 79 | int Load(struct drive *drive, uint8_t *buf, |
| 80 | const uint64_t sector, |
| 81 | const uint64_t sector_bytes, |
| 82 | const uint64_t sector_count) { |
| 83 | int count; /* byte count to read */ |
| 84 | int nread; |
| 85 | |
| 86 | require(buf)do { if (!(buf)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "buf", "cgpt/cgpt_common.c", 86); exit(1); } } while (0); |
| 87 | if (!sector_count || !sector_bytes) { |
| 88 | Error("%s() failed at line %d: sector_count=%" PRIu64"l" "u" ", sector_bytes=%" PRIu64"l" "u" "\n", |
| 89 | __FUNCTION__, __LINE__89, sector_count, sector_bytes); |
| 90 | return CGPT_FAILED; |
| 91 | } |
| 92 | /* Make sure that sector_bytes * sector_count doesn't roll over. */ |
| 93 | if (sector_bytes > (UINT64_MAX(18446744073709551615UL) / sector_count)) { |
| 94 | Error("%s() failed at line %d: sector_count=%" PRIu64"l" "u" ", sector_bytes=%" PRIu64"l" "u" "\n", |
| 95 | __FUNCTION__, __LINE__95, sector_count, sector_bytes); |
| 96 | return CGPT_FAILED; |
| 97 | } |
| 98 | count = sector_bytes * sector_count; |
| 99 | |
| 100 | if (-1 == lseek(drive->fd, sector * sector_bytes, SEEK_SET0)) { |
| 101 | Error("Can't seek: %s\n", strerror(errno(*__errno_location ()))); |
| 102 | return CGPT_FAILED; |
| 103 | } |
| 104 | |
| 105 | nread = read(drive->fd, buf, count); |
| 106 | if (nread < count) { |
| 107 | Error("Can't read enough: %d, not %d\n", nread, count); |
| 108 | return CGPT_FAILED; |
| 109 | } |
| 110 | |
| 111 | return CGPT_OK; |
| 112 | } |
| 113 | |
| 114 | |
| 115 | int ReadPMBR(struct drive *drive) { |
| 116 | if (-1 == lseek(drive->fd, 0, SEEK_SET0)) |
| 117 | return CGPT_FAILED; |
| 118 | |
| 119 | int nread = read(drive->fd, &drive->pmbr, sizeof(struct pmbr)); |
| 120 | if (nread != sizeof(struct pmbr)) |
| 121 | return CGPT_FAILED; |
| 122 | |
| 123 | return CGPT_OK; |
| 124 | } |
| 125 | |
| 126 | int WritePMBR(struct drive *drive) { |
| 127 | if (-1 == lseek(drive->fd, 0, SEEK_SET0)) |
| 128 | return CGPT_FAILED; |
| 129 | |
| 130 | int nwrote = write(drive->fd, &drive->pmbr, sizeof(struct pmbr)); |
| 131 | if (nwrote != sizeof(struct pmbr)) |
| 132 | return CGPT_FAILED; |
| 133 | |
| 134 | return CGPT_OK; |
| 135 | } |
| 136 | |
| 137 | int Save(struct drive *drive, const uint8_t *buf, |
| 138 | const uint64_t sector, |
| 139 | const uint64_t sector_bytes, |
| 140 | const uint64_t sector_count) { |
| 141 | int count; /* byte count to write */ |
| 142 | int nwrote; |
| 143 | |
| 144 | require(buf)do { if (!(buf)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "buf", "cgpt/cgpt_common.c", 144); exit(1); } } while (0); |
| 145 | count = sector_bytes * sector_count; |
| 146 | |
| 147 | if (-1 == lseek(drive->fd, sector * sector_bytes, SEEK_SET0)) |
| 148 | return CGPT_FAILED; |
| 149 | |
| 150 | nwrote = write(drive->fd, buf, count); |
| 151 | if (nwrote < count) |
| 152 | return CGPT_FAILED; |
| 153 | |
| 154 | return CGPT_OK; |
| 155 | } |
| 156 | |
| 157 | static int GptLoad(struct drive *drive, uint32_t sector_bytes) { |
| 158 | drive->gpt.sector_bytes = sector_bytes; |
| 159 | if (drive->size % drive->gpt.sector_bytes) { |
| 160 | Error("Media size (%llu) is not a multiple of sector size(%d)\n", |
| 161 | (long long unsigned int)drive->size, drive->gpt.sector_bytes); |
| 162 | return -1; |
| 163 | } |
| 164 | drive->gpt.streaming_drive_sectors = drive->size / drive->gpt.sector_bytes; |
| 165 | |
| 166 | drive->gpt.primary_header = malloc(drive->gpt.sector_bytes); |
| 167 | drive->gpt.secondary_header = malloc(drive->gpt.sector_bytes); |
| 168 | drive->gpt.primary_entries = malloc(GPT_ENTRIES_ALLOC_SIZE(128 * sizeof(GptEntry))); |
| 169 | drive->gpt.secondary_entries = malloc(GPT_ENTRIES_ALLOC_SIZE(128 * sizeof(GptEntry))); |
| 170 | if (!drive->gpt.primary_header || !drive->gpt.secondary_header || |
| 171 | !drive->gpt.primary_entries || !drive->gpt.secondary_entries) |
| 172 | return -1; |
| 173 | |
| 174 | /* TODO(namnguyen): Remove this and totally trust gpt_drive_sectors. */ |
| 175 | if (!(drive->gpt.flags & GPT_FLAG_EXTERNAL0x1)) { |
| 176 | drive->gpt.gpt_drive_sectors = drive->gpt.streaming_drive_sectors; |
| 177 | } /* Else, we trust gpt.gpt_drive_sectors. */ |
| 178 | |
| 179 | // Read the data. |
| 180 | if (CGPT_OK != Load(drive, drive->gpt.primary_header, |
| 181 | GPT_PMBR_SECTORS1, |
| 182 | drive->gpt.sector_bytes, GPT_HEADER_SECTORS1)) { |
| 183 | Error("Cannot read primary GPT header\n"); |
| 184 | return -1; |
| 185 | } |
| 186 | if (CGPT_OK != Load(drive, drive->gpt.secondary_header, |
| 187 | drive->gpt.gpt_drive_sectors - GPT_PMBR_SECTORS1, |
| 188 | drive->gpt.sector_bytes, GPT_HEADER_SECTORS1)) { |
| 189 | Error("Cannot read secondary GPT header\n"); |
| 190 | return -1; |
| 191 | } |
| 192 | GptHeader* primary_header = (GptHeader*)drive->gpt.primary_header; |
| 193 | if (CheckHeader(primary_header, 0, drive->gpt.streaming_drive_sectors, |
| 194 | drive->gpt.gpt_drive_sectors, |
| 195 | drive->gpt.flags, |
| 196 | drive->gpt.sector_bytes) == 0) { |
| 197 | if (CGPT_OK != Load(drive, drive->gpt.primary_entries, |
| 198 | primary_header->entries_lba, |
| 199 | drive->gpt.sector_bytes, |
| 200 | CalculateEntriesSectors(primary_header, |
| 201 | drive->gpt.sector_bytes))) { |
| 202 | Error("Cannot read primary partition entry array\n"); |
| 203 | return -1; |
| 204 | } |
| 205 | } else { |
| 206 | Warning("Primary GPT header is %s\n", |
| 207 | memcmp(primary_header->signature, GPT_HEADER_SIGNATURE_IGNORED"IGNOREME", |
| 208 | GPT_HEADER_SIGNATURE_SIZE8) ? "invalid" : "being ignored"); |
| 209 | } |
| 210 | GptHeader* secondary_header = (GptHeader*)drive->gpt.secondary_header; |
| 211 | if (CheckHeader(secondary_header, 1, drive->gpt.streaming_drive_sectors, |
| 212 | drive->gpt.gpt_drive_sectors, |
| 213 | drive->gpt.flags, |
| 214 | drive->gpt.sector_bytes) == 0) { |
| 215 | if (CGPT_OK != Load(drive, drive->gpt.secondary_entries, |
| 216 | secondary_header->entries_lba, |
| 217 | drive->gpt.sector_bytes, |
| 218 | CalculateEntriesSectors(secondary_header, |
| 219 | drive->gpt.sector_bytes))) { |
| 220 | Error("Cannot read secondary partition entry array\n"); |
| 221 | return -1; |
| 222 | } |
| 223 | } else { |
| 224 | Warning("Secondary GPT header is %s\n", |
| 225 | memcmp(primary_header->signature, GPT_HEADER_SIGNATURE_IGNORED"IGNOREME", |
| 226 | GPT_HEADER_SIGNATURE_SIZE8) ? "invalid" : "being ignored"); |
| 227 | } |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | static int GptSave(struct drive *drive) { |
| 232 | int errors = 0; |
| 233 | |
| 234 | if (!(drive->gpt.ignored & MASK_PRIMARY)) { |
| 235 | if (drive->gpt.modified & GPT_MODIFIED_HEADER10x01) { |
| 236 | if (CGPT_OK != Save(drive, drive->gpt.primary_header, |
| 237 | GPT_PMBR_SECTORS1, |
| 238 | drive->gpt.sector_bytes, GPT_HEADER_SECTORS1)) { |
| 239 | errors++; |
| 240 | Error("Cannot write primary header: %s\n", strerror(errno(*__errno_location ()))); |
| 241 | } |
| 242 | } |
| 243 | GptHeader* primary_header = (GptHeader*)drive->gpt.primary_header; |
| 244 | if (drive->gpt.modified & GPT_MODIFIED_ENTRIES10x04) { |
| 245 | if (CGPT_OK != Save(drive, drive->gpt.primary_entries, |
| 246 | primary_header->entries_lba, |
| 247 | drive->gpt.sector_bytes, |
| 248 | CalculateEntriesSectors(primary_header, |
| 249 | drive->gpt.sector_bytes))) { |
| 250 | errors++; |
| 251 | Error("Cannot write primary entries: %s\n", strerror(errno(*__errno_location ()))); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | // Sync primary GPT before touching secondary so one is always valid. |
| 256 | if (drive->gpt.modified & (GPT_MODIFIED_HEADER10x01 | GPT_MODIFIED_ENTRIES10x04)) |
| 257 | if (fsync(drive->fd) < 0 && errno(*__errno_location ()) == EIO5) { |
| 258 | errors++; |
| 259 | Error("I/O error when trying to write primary GPT\n"); |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | // Only start writing secondary GPT if primary was written correctly. |
| 264 | if (!errors && !(drive->gpt.ignored & MASK_SECONDARY)) { |
| 265 | if (drive->gpt.modified & GPT_MODIFIED_HEADER20x02) { |
| 266 | if(CGPT_OK != Save(drive, drive->gpt.secondary_header, |
| 267 | drive->gpt.gpt_drive_sectors - GPT_PMBR_SECTORS1, |
| 268 | drive->gpt.sector_bytes, GPT_HEADER_SECTORS1)) { |
| 269 | errors++; |
| 270 | Error("Cannot write secondary header: %s\n", strerror(errno(*__errno_location ()))); |
| 271 | } |
| 272 | } |
| 273 | GptHeader* secondary_header = (GptHeader*)drive->gpt.secondary_header; |
| 274 | if (drive->gpt.modified & GPT_MODIFIED_ENTRIES20x08) { |
| 275 | if (CGPT_OK != Save(drive, drive->gpt.secondary_entries, |
| 276 | secondary_header->entries_lba, |
| 277 | drive->gpt.sector_bytes, |
| 278 | CalculateEntriesSectors(secondary_header, |
| 279 | drive->gpt.sector_bytes))) { |
| 280 | errors++; |
| 281 | Error("Cannot write secondary entries: %s\n", strerror(errno(*__errno_location ()))); |
| 282 | } |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | return errors ? -1 : 0; |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * Query drive size and bytes per sector. Return zero on success. On error, |
| 291 | * -1 is returned and errno is set appropriately. |
| 292 | */ |
| 293 | static int ObtainDriveSize(int fd, uint64_t* size, uint32_t* sector_bytes) { |
| 294 | struct stat stat; |
| 295 | if (fstat(fd, &stat) == -1) { |
| 296 | return -1; |
| 297 | } |
| 298 | #if !defined(HAVE_MACOS) && !defined(__FreeBSD__) && !defined(__OpenBSD__) |
| 299 | if ((stat.st_mode & S_IFMT0170000) != S_IFREG0100000) { |
| 300 | if (ioctl(fd, BLKGETSIZE64(((2U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8)) | (((114)) << 0) | ((((sizeof(size_t)))) << ((0 + 8)+8))), size) < 0) { |
| 301 | return -1; |
| 302 | } |
| 303 | if (ioctl(fd, BLKSSZGET(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8)) | (((104)) << 0) | ((0) << ((0 +8)+8))), sector_bytes) < 0) { |
| 304 | return -1; |
| 305 | } |
| 306 | } else { |
| 307 | *sector_bytes = 512; /* bytes */ |
| 308 | *size = stat.st_size; |
| 309 | } |
| 310 | #else |
| 311 | *sector_bytes = 512; /* bytes */ |
| 312 | *size = stat.st_size; |
| 313 | #endif |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | int DriveOpen(const char *drive_path, struct drive *drive, int mode, |
| 318 | uint64_t drive_size) { |
| 319 | uint32_t sector_bytes; |
| 320 | |
| 321 | require(drive_path)do { if (!(drive_path)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "drive_path", "cgpt/cgpt_common.c", 321); exit(1); } } while (0); |
| 322 | require(drive)do { if (!(drive)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "drive", "cgpt/cgpt_common.c", 322); exit(1); } } while (0); |
| 323 | |
| 324 | // Clear struct for proper error handling. |
| 325 | memset(drive, 0, sizeof(struct drive)); |
| 326 | |
| 327 | drive->fd = open(drive_path, mode | |
| 328 | #if !defined(HAVE_MACOS) && !defined(__FreeBSD__) && !defined(__OpenBSD__) |
| 329 | O_LARGEFILE0 | |
| 330 | #endif |
| 331 | O_NOFOLLOW0400000); |
| 332 | if (drive->fd == -1) { |
| 333 | Error("Can't open %s: %s\n", drive_path, strerror(errno(*__errno_location ()))); |
| 334 | return CGPT_FAILED; |
| 335 | } |
| 336 | |
| 337 | uint64_t gpt_drive_size; |
| 338 | if (ObtainDriveSize(drive->fd, &gpt_drive_size, §or_bytes) != 0) { |
| 339 | Error("Can't get drive size and bytes per sector for %s: %s\n", |
| 340 | drive_path, strerror(errno(*__errno_location ()))); |
| 341 | goto error_close; |
| 342 | } |
| 343 | |
| 344 | drive->gpt.gpt_drive_sectors = gpt_drive_size / sector_bytes; |
| 345 | if (drive_size == 0) { |
| 346 | drive->size = gpt_drive_size; |
| 347 | drive->gpt.flags = 0; |
| 348 | } else { |
| 349 | drive->size = drive_size; |
| 350 | drive->gpt.flags = GPT_FLAG_EXTERNAL0x1; |
| 351 | } |
| 352 | |
| 353 | |
| 354 | if (GptLoad(drive, sector_bytes)) { |
| 355 | goto error_close; |
| 356 | } |
| 357 | |
| 358 | // We just load the data. Caller must validate it. |
| 359 | return CGPT_OK; |
| 360 | |
| 361 | error_close: |
| 362 | (void) DriveClose(drive, 0); |
| 363 | return CGPT_FAILED; |
| 364 | } |
| 365 | |
| 366 | |
| 367 | int DriveClose(struct drive *drive, int update_as_needed) { |
| 368 | int errors = 0; |
| 369 | |
| 370 | if (update_as_needed) { |
| 371 | if (GptSave(drive)) { |
| 372 | errors++; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | free(drive->gpt.primary_header); |
| 377 | drive->gpt.primary_header = NULL((void*)0); |
| 378 | free(drive->gpt.primary_entries); |
| 379 | drive->gpt.primary_entries = NULL((void*)0); |
| 380 | free(drive->gpt.secondary_header); |
| 381 | drive->gpt.secondary_header = NULL((void*)0); |
| 382 | free(drive->gpt.secondary_entries); |
| 383 | drive->gpt.secondary_entries = NULL((void*)0); |
| 384 | |
| 385 | // Sync early! Only sync file descriptor here, and leave the whole system sync |
| 386 | // outside cgpt because whole system sync would trigger tons of disk accesses |
| 387 | // and timeout tests. |
| 388 | fsync(drive->fd); |
| 389 | |
| 390 | close(drive->fd); |
| 391 | |
| 392 | return errors ? CGPT_FAILED : CGPT_OK; |
| 393 | } |
| 394 | |
| 395 | |
| 396 | /* GUID conversion functions. Accepted format: |
| 397 | * |
| 398 | * "C12A7328-F81F-11D2-BA4B-00A0C93EC93B" |
| 399 | * |
| 400 | * Returns CGPT_OK if parsing is successful; otherwise CGPT_FAILED. |
| 401 | */ |
| 402 | int StrToGuid(const char *str, Guid *guid) { |
| 403 | uint32_t time_low; |
| 404 | uint16_t time_mid; |
| 405 | uint16_t time_high_and_version; |
| 406 | unsigned int chunk[11]; |
| 407 | |
| 408 | if (11 != sscanf(str, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X", |
| 409 | chunk+0, |
| 410 | chunk+1, |
| 411 | chunk+2, |
| 412 | chunk+3, |
| 413 | chunk+4, |
| 414 | chunk+5, |
| 415 | chunk+6, |
| 416 | chunk+7, |
| 417 | chunk+8, |
| 418 | chunk+9, |
| 419 | chunk+10)) { |
| 420 | printf("FAILED\n"); |
| 421 | return CGPT_FAILED; |
| 422 | } |
| 423 | |
| 424 | time_low = chunk[0] & 0xffffffff; |
| 425 | time_mid = chunk[1] & 0xffff; |
| 426 | time_high_and_version = chunk[2] & 0xffff; |
| 427 | |
| 428 | guid->u.Uuid.time_low = htole32(time_low)__uint32_identity (time_low); |
| 429 | guid->u.Uuid.time_mid = htole16(time_mid)__uint16_identity (time_mid); |
| 430 | guid->u.Uuid.time_high_and_version = htole16(time_high_and_version)__uint16_identity (time_high_and_version); |
| 431 | |
| 432 | guid->u.Uuid.clock_seq_high_and_reserved = chunk[3] & 0xff; |
| 433 | guid->u.Uuid.clock_seq_low = chunk[4] & 0xff; |
| 434 | guid->u.Uuid.node[0] = chunk[5] & 0xff; |
| 435 | guid->u.Uuid.node[1] = chunk[6] & 0xff; |
| 436 | guid->u.Uuid.node[2] = chunk[7] & 0xff; |
| 437 | guid->u.Uuid.node[3] = chunk[8] & 0xff; |
| 438 | guid->u.Uuid.node[4] = chunk[9] & 0xff; |
| 439 | guid->u.Uuid.node[5] = chunk[10] & 0xff; |
| 440 | |
| 441 | return CGPT_OK; |
| 442 | } |
| 443 | void GuidToStr(const Guid *guid, char *str, unsigned int buflen) { |
| 444 | require(buflen >= GUID_STRLEN)do { if (!(buflen >= 37)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "buflen >= GUID_STRLEN", "cgpt/cgpt_common.c", 444); exit (1); } } while (0); |
| 445 | require(snprintf(str, buflen,do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 446 | "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X",do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 447 | le32toh(guid->u.Uuid.time_low),do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 448 | le16toh(guid->u.Uuid.time_mid),do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 449 | le16toh(guid->u.Uuid.time_high_and_version),do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 450 | guid->u.Uuid.clock_seq_high_and_reserved,do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 451 | guid->u.Uuid.clock_seq_low,do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 452 | guid->u.Uuid.node[0], guid->u.Uuid.node[1],do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 453 | guid->u.Uuid.node[2], guid->u.Uuid.node[3],do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0) |
| 454 | guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1)do { if (!(snprintf(str, buflen, "%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X" , __uint32_identity (guid->u.Uuid.time_low), __uint16_identity (guid->u.Uuid.time_mid), __uint16_identity (guid->u.Uuid .time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved , guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid ->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid .node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == 37 -1)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X\", le32toh(guid->u.Uuid.time_low), le16toh(guid->u.Uuid.time_mid), le16toh(guid->u.Uuid.time_high_and_version), guid->u.Uuid.clock_seq_high_and_reserved, guid->u.Uuid.clock_seq_low, guid->u.Uuid.node[0], guid->u.Uuid.node[1], guid->u.Uuid.node[2], guid->u.Uuid.node[3], guid->u.Uuid.node[4], guid->u.Uuid.node[5]) == GUID_STRLEN-1" , "cgpt/cgpt_common.c", 454); exit(1); } } while (0); |
| 455 | } |
| 456 | |
| 457 | /* Convert possibly unterminated UTF16 string to UTF8. |
| 458 | * Caller must prepare enough space for UTF8, which could be up to |
| 459 | * twice the byte length of UTF16 string plus the terminating '\0'. |
| 460 | * See the following table for encoding lengths. |
| 461 | * |
| 462 | * Code point UTF16 UTF8 |
| 463 | * 0x0000-0x007F 2 bytes 1 byte |
| 464 | * 0x0080-0x07FF 2 bytes 2 bytes |
| 465 | * 0x0800-0xFFFF 2 bytes 3 bytes |
| 466 | * 0x10000-0x10FFFF 4 bytes 4 bytes |
| 467 | * |
| 468 | * This function uses a simple state meachine to convert UTF-16 char(s) to |
| 469 | * a code point. Once a code point is parsed out, the state machine throws |
| 470 | * out sequencial UTF-8 chars in one time. |
| 471 | * |
| 472 | * Return: CGPT_OK --- all character are converted successfully. |
| 473 | * CGPT_FAILED --- convert error, i.e. output buffer is too short. |
| 474 | */ |
| 475 | int UTF16ToUTF8(const uint16_t *utf16, unsigned int maxinput, |
| 476 | uint8_t *utf8, unsigned int maxoutput) |
| 477 | { |
| 478 | size_t s16idx, s8idx; |
| 479 | uint32_t code_point = 0; |
| 480 | int code_point_ready = 1; // code point is ready to output. |
| 481 | int retval = CGPT_OK; |
| 482 | |
| 483 | if (!utf16 || !maxinput || !utf8 || !maxoutput) |
| 484 | return CGPT_FAILED; |
| 485 | |
| 486 | maxoutput--; /* plan for termination now */ |
| 487 | |
| 488 | for (s16idx = s8idx = 0; |
| 489 | s16idx < maxinput && utf16[s16idx] && maxoutput; |
| 490 | s16idx++) { |
| 491 | uint16_t codeunit = le16toh(utf16[s16idx])__uint16_identity (utf16[s16idx]); |
| 492 | |
| 493 | if (code_point_ready) { |
| 494 | if (codeunit >= 0xD800 && codeunit <= 0xDBFF) { |
| 495 | /* high surrogate, need the low surrogate. */ |
| 496 | code_point_ready = 0; |
| 497 | code_point = (codeunit & 0x03FF) + 0x0040; |
| 498 | } else { |
| 499 | /* BMP char, output it. */ |
| 500 | code_point = codeunit; |
| 501 | } |
| 502 | } else { |
| 503 | /* expect the low surrogate */ |
| 504 | if (codeunit >= 0xDC00 && codeunit <= 0xDFFF) { |
| 505 | code_point = (code_point << 10) | (codeunit & 0x03FF); |
| 506 | code_point_ready = 1; |
| 507 | } else { |
| 508 | /* the second code unit is NOT the low surrogate. Unexpected. */ |
| 509 | code_point_ready = 0; |
Value stored to 'code_point_ready' is never read | |
| 510 | retval = CGPT_FAILED; |
| 511 | break; |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | /* If UTF code point is ready, output it. */ |
| 516 | if (code_point_ready) { |
| 517 | require(code_point <= 0x10FFFF)do { if (!(code_point <= 0x10FFFF)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "code_point <= 0x10FFFF", "cgpt/cgpt_common.c", 517); exit (1); } } while (0); |
| 518 | if (code_point <= 0x7F && maxoutput >= 1) { |
| 519 | maxoutput -= 1; |
| 520 | utf8[s8idx++] = code_point & 0x7F; |
| 521 | } else if (code_point <= 0x7FF && maxoutput >= 2) { |
| 522 | maxoutput -= 2; |
| 523 | utf8[s8idx++] = 0xC0 | (code_point >> 6); |
| 524 | utf8[s8idx++] = 0x80 | (code_point & 0x3F); |
| 525 | } else if (code_point <= 0xFFFF && maxoutput >= 3) { |
| 526 | maxoutput -= 3; |
| 527 | utf8[s8idx++] = 0xE0 | (code_point >> 12); |
| 528 | utf8[s8idx++] = 0x80 | ((code_point >> 6) & 0x3F); |
| 529 | utf8[s8idx++] = 0x80 | (code_point & 0x3F); |
| 530 | } else if (code_point <= 0x10FFFF && maxoutput >= 4) { |
| 531 | maxoutput -= 4; |
| 532 | utf8[s8idx++] = 0xF0 | (code_point >> 18); |
| 533 | utf8[s8idx++] = 0x80 | ((code_point >> 12) & 0x3F); |
| 534 | utf8[s8idx++] = 0x80 | ((code_point >> 6) & 0x3F); |
| 535 | utf8[s8idx++] = 0x80 | (code_point & 0x3F); |
| 536 | } else { |
| 537 | /* buffer underrun */ |
| 538 | retval = CGPT_FAILED; |
| 539 | break; |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | utf8[s8idx++] = 0; |
| 544 | return retval; |
| 545 | } |
| 546 | |
| 547 | /* Convert UTF8 string to UTF16. The UTF8 string must be null-terminated. |
| 548 | * Caller must prepare enough space for UTF16, including a terminating 0x0000. |
| 549 | * See the following table for encoding lengths. In any case, the caller |
| 550 | * just needs to prepare the byte length of UTF8 plus the terminating 0x0000. |
| 551 | * |
| 552 | * Code point UTF16 UTF8 |
| 553 | * 0x0000-0x007F 2 bytes 1 byte |
| 554 | * 0x0080-0x07FF 2 bytes 2 bytes |
| 555 | * 0x0800-0xFFFF 2 bytes 3 bytes |
| 556 | * 0x10000-0x10FFFF 4 bytes 4 bytes |
| 557 | * |
| 558 | * This function converts UTF8 chars to a code point first. Then, convrts it |
| 559 | * to UTF16 code unit(s). |
| 560 | * |
| 561 | * Return: CGPT_OK --- all character are converted successfully. |
| 562 | * CGPT_FAILED --- convert error, i.e. output buffer is too short. |
| 563 | */ |
| 564 | int UTF8ToUTF16(const uint8_t *utf8, uint16_t *utf16, unsigned int maxoutput) |
| 565 | { |
| 566 | size_t s16idx, s8idx; |
| 567 | uint32_t code_point = 0; |
| 568 | unsigned int expected_units = 1; |
| 569 | unsigned int decoded_units = 1; |
| 570 | int retval = CGPT_OK; |
| 571 | |
| 572 | if (!utf8 || !utf16 || !maxoutput) |
| 573 | return CGPT_FAILED; |
| 574 | |
| 575 | maxoutput--; /* plan for termination */ |
| 576 | |
| 577 | for (s8idx = s16idx = 0; |
| 578 | utf8[s8idx] && maxoutput; |
| 579 | s8idx++) { |
| 580 | uint8_t code_unit; |
| 581 | code_unit = utf8[s8idx]; |
| 582 | |
| 583 | if (expected_units != decoded_units) { |
| 584 | /* Trailing bytes of multi-byte character */ |
| 585 | if ((code_unit & 0xC0) == 0x80) { |
| 586 | code_point = (code_point << 6) | (code_unit & 0x3F); |
| 587 | ++decoded_units; |
| 588 | } else { |
| 589 | /* Unexpected code unit. */ |
| 590 | retval = CGPT_FAILED; |
| 591 | break; |
| 592 | } |
| 593 | } else { |
| 594 | /* parsing a new code point. */ |
| 595 | decoded_units = 1; |
| 596 | if (code_unit <= 0x7F) { |
| 597 | code_point = code_unit; |
| 598 | expected_units = 1; |
| 599 | } else if (code_unit <= 0xBF) { |
| 600 | /* 0x80-0xBF must NOT be the heading byte unit of a new code point. */ |
| 601 | retval = CGPT_FAILED; |
| 602 | break; |
| 603 | } else if (code_unit >= 0xC2 && code_unit <= 0xDF) { |
| 604 | code_point = code_unit & 0x1F; |
| 605 | expected_units = 2; |
| 606 | } else if (code_unit >= 0xE0 && code_unit <= 0xEF) { |
| 607 | code_point = code_unit & 0x0F; |
| 608 | expected_units = 3; |
| 609 | } else if (code_unit >= 0xF0 && code_unit <= 0xF4) { |
| 610 | code_point = code_unit & 0x07; |
| 611 | expected_units = 4; |
| 612 | } else { |
| 613 | /* illegal code unit: 0xC0-0xC1, 0xF5-0xFF */ |
| 614 | retval = CGPT_FAILED; |
| 615 | break; |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | /* If no more unit is needed, output the UTF16 unit(s). */ |
| 620 | if ((retval == CGPT_OK) && |
| 621 | (expected_units == decoded_units)) { |
| 622 | /* Check if the encoding is the shortest possible UTF-8 sequence. */ |
| 623 | switch (expected_units) { |
| 624 | case 2: |
| 625 | if (code_point <= 0x7F) retval = CGPT_FAILED; |
| 626 | break; |
| 627 | case 3: |
| 628 | if (code_point <= 0x7FF) retval = CGPT_FAILED; |
| 629 | break; |
| 630 | case 4: |
| 631 | if (code_point <= 0xFFFF) retval = CGPT_FAILED; |
| 632 | break; |
| 633 | } |
| 634 | if (retval == CGPT_FAILED) break; /* leave immediately */ |
| 635 | |
| 636 | if ((code_point <= 0xD7FF) || |
| 637 | (code_point >= 0xE000 && code_point <= 0xFFFF)) { |
| 638 | utf16[s16idx++] = code_point; |
| 639 | maxoutput -= 1; |
| 640 | } else if (code_point >= 0x10000 && code_point <= 0x10FFFF && |
| 641 | maxoutput >= 2) { |
| 642 | utf16[s16idx++] = 0xD800 | ((code_point >> 10) - 0x0040); |
| 643 | utf16[s16idx++] = 0xDC00 | (code_point & 0x03FF); |
| 644 | maxoutput -= 2; |
| 645 | } else { |
| 646 | /* Three possibilities fall into here. Both are failure cases. |
| 647 | * a. surrogate pair (non-BMP characters; 0xD800~0xDFFF) |
| 648 | * b. invalid code point > 0x10FFFF |
| 649 | * c. buffer underrun |
| 650 | */ |
| 651 | retval = CGPT_FAILED; |
| 652 | break; |
| 653 | } |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | /* A null-terminator shows up before the UTF8 sequence ends. */ |
| 658 | if (expected_units != decoded_units) { |
| 659 | retval = CGPT_FAILED; |
| 660 | } |
| 661 | |
| 662 | utf16[s16idx++] = 0; |
| 663 | return retval; |
| 664 | } |
| 665 | |
| 666 | /* global types to compare against */ |
| 667 | const Guid guid_chromeos_firmware = GPT_ENT_TYPE_CHROMEOS_FIRMWARE{{{0xcab6e88e,0xabf3,0x4102,0xa0,0x7a,{0xd4,0xbb,0x9b,0xe3,0xc1 ,0xd3}}}}; |
| 668 | const Guid guid_chromeos_kernel = GPT_ENT_TYPE_CHROMEOS_KERNEL{{{0xfe3a2a5d,0x4f32,0x41a7,0xb7,0x25,{0xac,0xcc,0x32,0x85,0xa3 ,0x09}}}}; |
| 669 | const Guid guid_chromeos_rootfs = GPT_ENT_TYPE_CHROMEOS_ROOTFS{{{0x3cb8e202,0x3b7e,0x47dd,0x8a,0x3c,{0x7f,0xf2,0xa1,0x3c,0xfc ,0xec}}}}; |
| 670 | const Guid guid_basic_data = GPT_ENT_TYPE_BASIC_DATA{{{0xebd0a0a2,0xb9e5,0x4433,0x87,0xc0,{0x68,0xb6,0xb7,0x26,0x99 ,0xc7}}}}; |
| 671 | const Guid guid_linux_data = GPT_ENT_TYPE_LINUX_FS{{{0x0fc63daf,0x8483,0x4772,0x8e,0x79,{0x3d,0x69,0xd8,0x47,0x7d ,0xe4}}}}; |
| 672 | const Guid guid_chromeos_reserved = GPT_ENT_TYPE_CHROMEOS_RESERVED{{{0x2e0a753d,0x9e48,0x43b0,0x83,0x37,{0xb1,0x51,0x92,0xcb,0x1b ,0x5e}}}}; |
| 673 | const Guid guid_efi = GPT_ENT_TYPE_EFI{{{0xc12a7328,0xf81f,0x11d2,0xba,0x4b,{0x00,0xa0,0xc9,0x3e,0xc9 ,0x3b}}}}; |
| 674 | const Guid guid_unused = GPT_ENT_TYPE_UNUSED{{{0x00000000,0x0000,0x0000,0x00,0x00,{0x00,0x00,0x00,0x00,0x00 ,0x00}}}}; |
| 675 | const Guid guid_chromeos_minios = GPT_ENT_TYPE_CHROMEOS_MINIOS{{{0x09845860,0x705f,0x4bb5,0xb1,0x6c,{0x8a,0x8a,0x09,0x9c,0xaf ,0x52}}}}; |
| 676 | const Guid guid_chromeos_hibernate = GPT_ENT_TYPE_CHROMEOS_HIBERNATE{{{0x3f0f8318,0xf146,0x4e6b,0x82,0x22,{0xc2,0x8c,0x8f,0x02,0xe0 ,0xd5}}}}; |
| 677 | |
| 678 | static const struct { |
| 679 | const Guid *type; |
| 680 | const char *name; |
| 681 | const char *description; |
| 682 | } supported_types[] = { |
| 683 | {&guid_chromeos_firmware, "firmware", "ChromeOS firmware"}, |
| 684 | {&guid_chromeos_kernel, "kernel", "ChromeOS kernel"}, |
| 685 | {&guid_chromeos_rootfs, "rootfs", "ChromeOS rootfs"}, |
| 686 | {&guid_linux_data, "data", "Linux data"}, |
| 687 | {&guid_basic_data, "basicdata", "Basic data"}, |
| 688 | {&guid_chromeos_reserved, "reserved", "ChromeOS reserved"}, |
| 689 | {&guid_efi, "efi", "EFI System Partition"}, |
| 690 | {&guid_unused, "unused", "Unused (nonexistent) partition"}, |
| 691 | {&guid_chromeos_minios, "minios", "ChromeOS miniOS"}, |
| 692 | {&guid_chromeos_hibernate, "hibernate", "ChromeOS hibernate"}, |
| 693 | }; |
| 694 | |
| 695 | /* Resolves human-readable GPT type. |
| 696 | * Returns CGPT_OK if found. |
| 697 | * Returns CGPT_FAILED if no known type found. */ |
| 698 | int ResolveType(const Guid *type, char *buf) { |
| 699 | int i; |
| 700 | for (i = 0; i < ARRAY_COUNT(supported_types)(sizeof(supported_types)/sizeof((supported_types)[0])); ++i) { |
| 701 | if (!memcmp(type, supported_types[i].type, sizeof(Guid))) { |
| 702 | strcpy(buf, supported_types[i].description); |
| 703 | return CGPT_OK; |
| 704 | } |
| 705 | } |
| 706 | return CGPT_FAILED; |
| 707 | } |
| 708 | |
| 709 | int SupportedType(const char *name, Guid *type) { |
| 710 | int i; |
| 711 | for (i = 0; i < ARRAY_COUNT(supported_types)(sizeof(supported_types)/sizeof((supported_types)[0])); ++i) { |
| 712 | if (!strcmp(name, supported_types[i].name)) { |
| 713 | memcpy(type, supported_types[i].type, sizeof(Guid)); |
| 714 | return CGPT_OK; |
| 715 | } |
| 716 | } |
| 717 | return CGPT_FAILED; |
| 718 | } |
| 719 | |
| 720 | void PrintTypes(void) { |
| 721 | int i; |
| 722 | printf("The partition type may also be given as one of these aliases:\n\n"); |
| 723 | for (i = 0; i < ARRAY_COUNT(supported_types)(sizeof(supported_types)/sizeof((supported_types)[0])); ++i) { |
| 724 | printf(" %-10s %s\n", supported_types[i].name, |
| 725 | supported_types[i].description); |
| 726 | } |
| 727 | printf("\n"); |
| 728 | } |
| 729 | |
| 730 | static GptHeader* GetGptHeader(const GptData *gpt) { |
| 731 | if (gpt->valid_headers & MASK_PRIMARY) |
| 732 | return (GptHeader*)gpt->primary_header; |
| 733 | else if (gpt->valid_headers & MASK_SECONDARY) |
| 734 | return (GptHeader*)gpt->secondary_header; |
| 735 | else |
| 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | uint32_t GetNumberOfEntries(const struct drive *drive) { |
| 740 | GptHeader *header = GetGptHeader(&drive->gpt); |
| 741 | if (!header) |
| 742 | return 0; |
| 743 | return header->number_of_entries; |
| 744 | } |
| 745 | |
| 746 | |
| 747 | GptEntry *GetEntry(GptData *gpt, int secondary, uint32_t entry_index) { |
| 748 | GptHeader *header = GetGptHeader(gpt); |
| 749 | uint8_t *entries; |
| 750 | uint32_t stride = header->size_of_entry; |
| 751 | require(stride)do { if (!(stride)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "stride", "cgpt/cgpt_common.c", 751); exit(1); } } while (0 ); |
| 752 | require(entry_index < header->number_of_entries)do { if (!(entry_index < header->number_of_entries)) { fprintf (stderr, "condition (%s) failed at %s:%d\n", "entry_index < header->number_of_entries" , "cgpt/cgpt_common.c", 752); exit(1); } } while (0); |
| 753 | |
| 754 | if (secondary == PRIMARY) { |
| 755 | entries = gpt->primary_entries; |
| 756 | } else if (secondary == SECONDARY) { |
| 757 | entries = gpt->secondary_entries; |
| 758 | } else { /* ANY_VALID */ |
| 759 | require(secondary == ANY_VALID)do { if (!(secondary == ANY_VALID)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "secondary == ANY_VALID", "cgpt/cgpt_common.c", 759); exit( 1); } } while (0); |
| 760 | if (gpt->valid_entries & MASK_PRIMARY) { |
| 761 | entries = gpt->primary_entries; |
| 762 | } else { |
| 763 | require(gpt->valid_entries & MASK_SECONDARY)do { if (!(gpt->valid_entries & MASK_SECONDARY)) { fprintf (stderr, "condition (%s) failed at %s:%d\n", "gpt->valid_entries & MASK_SECONDARY" , "cgpt/cgpt_common.c", 763); exit(1); } } while (0); |
| 764 | entries = gpt->secondary_entries; |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | return (GptEntry*)(&entries[stride * entry_index]); |
| 769 | } |
| 770 | |
| 771 | void SetRequired(struct drive *drive, int secondary, uint32_t entry_index, |
| 772 | int required) { |
| 773 | require(required >= 0 && required <= CGPT_ATTRIBUTE_MAX_REQUIRED)do { if (!(required >= 0 && required <= (1ULL)) ) { fprintf(stderr, "condition (%s) failed at %s:%d\n", "required >= 0 && required <= CGPT_ATTRIBUTE_MAX_REQUIRED" , "cgpt/cgpt_common.c", 773); exit(1); } } while (0); |
| 774 | GptEntry *entry; |
| 775 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 776 | SetEntryRequired(entry, required); |
| 777 | } |
| 778 | |
| 779 | int GetRequired(struct drive *drive, int secondary, uint32_t entry_index) { |
| 780 | GptEntry *entry; |
| 781 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 782 | return GetEntryRequired(entry); |
| 783 | } |
| 784 | |
| 785 | void SetLegacyBoot(struct drive *drive, int secondary, uint32_t entry_index, |
| 786 | int legacy_boot) { |
| 787 | require(legacy_boot >= 0 && legacy_boot <= CGPT_ATTRIBUTE_MAX_LEGACY_BOOT)do { if (!(legacy_boot >= 0 && legacy_boot <= ( 1ULL))) { fprintf(stderr, "condition (%s) failed at %s:%d\n", "legacy_boot >= 0 && legacy_boot <= CGPT_ATTRIBUTE_MAX_LEGACY_BOOT" , "cgpt/cgpt_common.c", 787); exit(1); } } while (0); |
| 788 | GptEntry *entry; |
| 789 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 790 | SetEntryLegacyBoot(entry, legacy_boot); |
| 791 | } |
| 792 | |
| 793 | int GetLegacyBoot(struct drive *drive, int secondary, uint32_t entry_index) { |
| 794 | GptEntry *entry; |
| 795 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 796 | return GetEntryLegacyBoot(entry); |
| 797 | } |
| 798 | |
| 799 | void SetPriority(struct drive *drive, int secondary, uint32_t entry_index, |
| 800 | int priority) { |
| 801 | require(priority >= 0 && priority <= CGPT_ATTRIBUTE_MAX_PRIORITY)do { if (!(priority >= 0 && priority <= (15ULL) )) { fprintf(stderr, "condition (%s) failed at %s:%d\n", "priority >= 0 && priority <= CGPT_ATTRIBUTE_MAX_PRIORITY" , "cgpt/cgpt_common.c", 801); exit(1); } } while (0); |
| 802 | GptEntry *entry; |
| 803 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 804 | SetEntryPriority(entry, priority); |
| 805 | } |
| 806 | |
| 807 | int GetPriority(struct drive *drive, int secondary, uint32_t entry_index) { |
| 808 | GptEntry *entry; |
| 809 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 810 | return GetEntryPriority(entry); |
| 811 | } |
| 812 | |
| 813 | void SetTries(struct drive *drive, int secondary, uint32_t entry_index, |
| 814 | int tries) { |
| 815 | require(tries >= 0 && tries <= CGPT_ATTRIBUTE_MAX_TRIES)do { if (!(tries >= 0 && tries <= (15ULL))) { fprintf (stderr, "condition (%s) failed at %s:%d\n", "tries >= 0 && tries <= CGPT_ATTRIBUTE_MAX_TRIES" , "cgpt/cgpt_common.c", 815); exit(1); } } while (0); |
| 816 | GptEntry *entry; |
| 817 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 818 | SetEntryTries(entry, tries); |
| 819 | } |
| 820 | |
| 821 | int GetTries(struct drive *drive, int secondary, uint32_t entry_index) { |
| 822 | GptEntry *entry; |
| 823 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 824 | return GetEntryTries(entry); |
| 825 | } |
| 826 | |
| 827 | void SetSuccessful(struct drive *drive, int secondary, uint32_t entry_index, |
| 828 | int success) { |
| 829 | require(success >= 0 && success <= CGPT_ATTRIBUTE_MAX_SUCCESSFUL)do { if (!(success >= 0 && success <= (1ULL))) { fprintf(stderr, "condition (%s) failed at %s:%d\n", "success >= 0 && success <= CGPT_ATTRIBUTE_MAX_SUCCESSFUL" , "cgpt/cgpt_common.c", 829); exit(1); } } while (0); |
| 830 | GptEntry *entry; |
| 831 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 832 | SetEntrySuccessful(entry, success); |
| 833 | } |
| 834 | |
| 835 | int GetSuccessful(struct drive *drive, int secondary, uint32_t entry_index) { |
| 836 | GptEntry *entry; |
| 837 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 838 | return GetEntrySuccessful(entry); |
| 839 | } |
| 840 | |
| 841 | void SetErrorCounter(struct drive *drive, int secondary, uint32_t entry_index, |
| 842 | int error_counter) { |
| 843 | require(error_counter >= 0 &&do { if (!(error_counter >= 0 && error_counter <= (1ULL))) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "error_counter >= 0 && error_counter <= CGPT_ATTRIBUTE_MAX_ERROR_COUNTER" , "cgpt/cgpt_common.c", 844); exit(1); } } while (0) |
| 844 | error_counter <= CGPT_ATTRIBUTE_MAX_ERROR_COUNTER)do { if (!(error_counter >= 0 && error_counter <= (1ULL))) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "error_counter >= 0 && error_counter <= CGPT_ATTRIBUTE_MAX_ERROR_COUNTER" , "cgpt/cgpt_common.c", 844); exit(1); } } while (0); |
| 845 | GptEntry *entry; |
| 846 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 847 | SetEntryErrorCounter(entry, error_counter); |
| 848 | } |
| 849 | |
| 850 | int GetErrorCounter(struct drive *drive, int secondary, uint32_t entry_index) { |
| 851 | GptEntry *entry; |
| 852 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 853 | return GetEntryErrorCounter(entry); |
| 854 | } |
| 855 | |
| 856 | void SetRaw(struct drive *drive, int secondary, uint32_t entry_index, |
| 857 | uint32_t raw) { |
| 858 | GptEntry *entry; |
| 859 | entry = GetEntry(&drive->gpt, secondary, entry_index); |
| 860 | entry->attrs.fields.gpt_att = (uint16_t)raw; |
| 861 | } |
| 862 | |
| 863 | void UpdateAllEntries(struct drive *drive) { |
| 864 | RepairEntries(&drive->gpt, MASK_PRIMARY); |
| 865 | RepairHeader(&drive->gpt, MASK_PRIMARY); |
| 866 | |
| 867 | drive->gpt.modified |= (GPT_MODIFIED_HEADER10x01 | GPT_MODIFIED_ENTRIES10x04 | |
| 868 | GPT_MODIFIED_HEADER20x02 | GPT_MODIFIED_ENTRIES20x08); |
| 869 | UpdateCrc(&drive->gpt); |
| 870 | } |
| 871 | |
| 872 | int IsUnused(struct drive *drive, int secondary, uint32_t index) { |
| 873 | GptEntry *entry; |
| 874 | entry = GetEntry(&drive->gpt, secondary, index); |
| 875 | return GuidIsZero(&entry->type); |
| 876 | } |
| 877 | |
| 878 | int IsKernel(struct drive *drive, int secondary, uint32_t index) { |
| 879 | GptEntry *entry; |
| 880 | entry = GetEntry(&drive->gpt, secondary, index); |
| 881 | return GuidEqual(&entry->type, &guid_chromeos_kernel); |
| 882 | } |
| 883 | |
| 884 | |
| 885 | #define TOSTRING(A)"A" #A |
| 886 | const char *GptError(int errnum) { |
| 887 | const char *error_string[] = { |
| 888 | TOSTRING(GPT_SUCCESS)"GPT_SUCCESS", |
| 889 | TOSTRING(GPT_ERROR_NO_VALID_KERNEL)"GPT_ERROR_NO_VALID_KERNEL", |
| 890 | TOSTRING(GPT_ERROR_INVALID_HEADERS)"GPT_ERROR_INVALID_HEADERS", |
| 891 | TOSTRING(GPT_ERROR_INVALID_ENTRIES)"GPT_ERROR_INVALID_ENTRIES", |
| 892 | TOSTRING(GPT_ERROR_INVALID_SECTOR_SIZE)"GPT_ERROR_INVALID_SECTOR_SIZE", |
| 893 | TOSTRING(GPT_ERROR_INVALID_SECTOR_NUMBER)"GPT_ERROR_INVALID_SECTOR_NUMBER", |
| 894 | TOSTRING(GPT_ERROR_INVALID_UPDATE_TYPE)"GPT_ERROR_INVALID_UPDATE_TYPE" |
| 895 | }; |
| 896 | if (errnum < 0 || errnum >= ARRAY_COUNT(error_string)(sizeof(error_string)/sizeof((error_string)[0]))) |
| 897 | return "<illegal value>"; |
| 898 | return error_string[errnum]; |
| 899 | } |
| 900 | |
| 901 | /* Update CRC value if necessary. */ |
| 902 | void UpdateCrc(GptData *gpt) { |
| 903 | GptHeader *primary_header, *secondary_header; |
| 904 | |
| 905 | primary_header = (GptHeader*)gpt->primary_header; |
| 906 | secondary_header = (GptHeader*)gpt->secondary_header; |
| 907 | |
| 908 | if (gpt->modified & GPT_MODIFIED_ENTRIES10x04 && |
| 909 | memcmp(primary_header, GPT_HEADER_SIGNATURE2"CHROMEOS", |
| 910 | GPT_HEADER_SIGNATURE_SIZE8)) { |
| 911 | size_t entries_size = primary_header->size_of_entry * |
| 912 | primary_header->number_of_entries; |
| 913 | primary_header->entries_crc32 = |
| 914 | Crc32(gpt->primary_entries, entries_size); |
| 915 | } |
| 916 | if (gpt->modified & GPT_MODIFIED_ENTRIES20x08) { |
| 917 | size_t entries_size = secondary_header->size_of_entry * |
| 918 | secondary_header->number_of_entries; |
| 919 | secondary_header->entries_crc32 = |
| 920 | Crc32(gpt->secondary_entries, entries_size); |
| 921 | } |
| 922 | if (gpt->modified & GPT_MODIFIED_HEADER10x01) { |
| 923 | primary_header->header_crc32 = 0; |
| 924 | primary_header->header_crc32 = Crc32( |
| 925 | (const uint8_t *)primary_header, sizeof(GptHeader)); |
| 926 | } |
| 927 | if (gpt->modified & GPT_MODIFIED_HEADER20x02) { |
| 928 | secondary_header->header_crc32 = 0; |
| 929 | secondary_header->header_crc32 = Crc32( |
| 930 | (const uint8_t *)secondary_header, sizeof(GptHeader)); |
| 931 | } |
| 932 | } |
| 933 | /* Two headers are NOT bitwise identical. For example, my_lba pointers to header |
| 934 | * itself so that my_lba in primary and secondary is definitely different. |
| 935 | * Only the following fields should be identical. |
| 936 | * |
| 937 | * first_usable_lba |
| 938 | * last_usable_lba |
| 939 | * number_of_entries |
| 940 | * size_of_entry |
| 941 | * disk_uuid |
| 942 | * |
| 943 | * If any of above field are not matched, overwrite secondary with primary since |
| 944 | * we always trust primary. |
| 945 | * If any one of header is invalid, copy from another. */ |
| 946 | int IsSynonymous(const GptHeader* a, const GptHeader* b) { |
| 947 | if ((a->first_usable_lba == b->first_usable_lba) && |
| 948 | (a->last_usable_lba == b->last_usable_lba) && |
| 949 | (a->number_of_entries == b->number_of_entries) && |
| 950 | (a->size_of_entry == b->size_of_entry) && |
| 951 | (!memcmp(&a->disk_uuid, &b->disk_uuid, sizeof(Guid)))) |
| 952 | return 1; |
| 953 | return 0; |
| 954 | } |
| 955 | |
| 956 | /* Primary entries and secondary entries should be bitwise identical. |
| 957 | * If two entries tables are valid, compare them. If not the same, |
| 958 | * overwrites secondary with primary (primary always has higher priority), |
| 959 | * and marks secondary as modified. |
| 960 | * If only one is valid, overwrites invalid one. |
| 961 | * If all are invalid, does nothing. |
| 962 | * This function returns bit masks for GptData.modified field. |
| 963 | * Note that CRC is NOT re-computed in this function. |
| 964 | */ |
| 965 | uint8_t RepairEntries(GptData *gpt, const uint32_t valid_entries) { |
| 966 | /* If we have an alternate GPT header signature, don't overwrite |
| 967 | * the secondary GPT with the primary one as that might wipe the |
| 968 | * partition table. Also don't overwrite the primary one with the |
| 969 | * secondary one as that will stop Windows from booting. */ |
| 970 | GptHeader* h = (GptHeader*)(gpt->primary_header); |
| 971 | if (!memcmp(h->signature, GPT_HEADER_SIGNATURE2"CHROMEOS", GPT_HEADER_SIGNATURE_SIZE8)) |
| 972 | return 0; |
| 973 | |
| 974 | if (gpt->valid_headers & MASK_PRIMARY) { |
| 975 | h = (GptHeader*)gpt->primary_header; |
| 976 | } else if (gpt->valid_headers & MASK_SECONDARY) { |
| 977 | h = (GptHeader*)gpt->secondary_header; |
| 978 | } else { |
| 979 | /* We cannot trust any header, don't update entries. */ |
| 980 | return 0; |
| 981 | } |
| 982 | |
| 983 | size_t entries_size = h->number_of_entries * h->size_of_entry; |
| 984 | if (valid_entries == MASK_BOTH) { |
| 985 | if (memcmp(gpt->primary_entries, gpt->secondary_entries, entries_size)) { |
| 986 | memcpy(gpt->secondary_entries, gpt->primary_entries, entries_size); |
| 987 | return GPT_MODIFIED_ENTRIES20x08; |
| 988 | } |
| 989 | } else if (valid_entries == MASK_PRIMARY) { |
| 990 | memcpy(gpt->secondary_entries, gpt->primary_entries, entries_size); |
| 991 | return GPT_MODIFIED_ENTRIES20x08; |
| 992 | } else if (valid_entries == MASK_SECONDARY) { |
| 993 | memcpy(gpt->primary_entries, gpt->secondary_entries, entries_size); |
| 994 | return GPT_MODIFIED_ENTRIES10x04; |
| 995 | } |
| 996 | |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | /* The above five fields are shared between primary and secondary headers. |
| 1001 | * We can recover one header from another through copying those fields. */ |
| 1002 | static void CopySynonymousParts(GptHeader* target, const GptHeader* source) { |
| 1003 | target->first_usable_lba = source->first_usable_lba; |
| 1004 | target->last_usable_lba = source->last_usable_lba; |
| 1005 | target->number_of_entries = source->number_of_entries; |
| 1006 | target->size_of_entry = source->size_of_entry; |
| 1007 | memcpy(&target->disk_uuid, &source->disk_uuid, sizeof(Guid)); |
| 1008 | } |
| 1009 | |
| 1010 | /* This function repairs primary and secondary headers if possible. |
| 1011 | * If both headers are valid (CRC32 is correct) but |
| 1012 | * a) indicate inconsistent usable LBA ranges, |
| 1013 | * b) inconsistent partition entry size and number, |
| 1014 | * c) inconsistent disk_uuid, |
| 1015 | * we will use the primary header to overwrite secondary header. |
| 1016 | * If primary is invalid (CRC32 is wrong), then we repair it from secondary. |
| 1017 | * If secondary is invalid (CRC32 is wrong), then we repair it from primary. |
| 1018 | * This function returns the bitmasks for modified header. |
| 1019 | * Note that CRC value is NOT re-computed in this function. UpdateCrc() will |
| 1020 | * do it later. |
| 1021 | */ |
| 1022 | uint8_t RepairHeader(GptData *gpt, const uint32_t valid_headers) { |
| 1023 | GptHeader *primary_header, *secondary_header; |
| 1024 | |
| 1025 | primary_header = (GptHeader*)gpt->primary_header; |
| 1026 | secondary_header = (GptHeader*)gpt->secondary_header; |
| 1027 | |
| 1028 | if (valid_headers == MASK_BOTH) { |
| 1029 | if (!IsSynonymous(primary_header, secondary_header)) { |
| 1030 | CopySynonymousParts(secondary_header, primary_header); |
| 1031 | return GPT_MODIFIED_HEADER20x02; |
| 1032 | } |
| 1033 | } else if (valid_headers == MASK_PRIMARY) { |
| 1034 | memcpy(secondary_header, primary_header, sizeof(GptHeader)); |
| 1035 | secondary_header->my_lba = gpt->gpt_drive_sectors - 1; /* the last sector */ |
| 1036 | secondary_header->alternate_lba = primary_header->my_lba; |
| 1037 | secondary_header->entries_lba = secondary_header->my_lba - |
| 1038 | CalculateEntriesSectors(primary_header, gpt->sector_bytes); |
| 1039 | return GPT_MODIFIED_HEADER20x02; |
| 1040 | } else if (valid_headers == MASK_SECONDARY) { |
| 1041 | memcpy(primary_header, secondary_header, sizeof(GptHeader)); |
| 1042 | primary_header->my_lba = GPT_PMBR_SECTORS1; /* the second sector on drive */ |
| 1043 | primary_header->alternate_lba = secondary_header->my_lba; |
| 1044 | /* TODO (namnguyen): Preserve (header, entries) padding space. */ |
| 1045 | primary_header->entries_lba = primary_header->my_lba + GPT_HEADER_SECTORS1; |
| 1046 | return GPT_MODIFIED_HEADER10x01; |
| 1047 | } |
| 1048 | |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
| 1052 | int CgptGetNumNonEmptyPartitions(CgptShowParams *params) { |
| 1053 | struct drive drive; |
| 1054 | int gpt_retval; |
| 1055 | int retval; |
| 1056 | |
| 1057 | if (params == NULL((void*)0)) |
| 1058 | return CGPT_FAILED; |
| 1059 | |
| 1060 | if (CGPT_OK != DriveOpen(params->drive_name, &drive, O_RDONLY00, |
| 1061 | params->drive_size)) |
| 1062 | return CGPT_FAILED; |
| 1063 | |
| 1064 | if (GPT_SUCCESS != (gpt_retval = GptValidityCheck(&drive.gpt))) { |
| 1065 | Error("GptValidityCheck() returned %d: %s\n", |
| 1066 | gpt_retval, GptError(gpt_retval)); |
| 1067 | retval = CGPT_FAILED; |
| 1068 | goto done; |
| 1069 | } |
| 1070 | |
| 1071 | params->num_partitions = 0; |
| 1072 | int numEntries = GetNumberOfEntries(&drive); |
| 1073 | int i; |
| 1074 | for(i = 0; i < numEntries; i++) { |
| 1075 | GptEntry *entry = GetEntry(&drive.gpt, ANY_VALID, i); |
| 1076 | if (GuidIsZero(&entry->type)) |
| 1077 | continue; |
| 1078 | |
| 1079 | params->num_partitions++; |
| 1080 | } |
| 1081 | |
| 1082 | retval = CGPT_OK; |
| 1083 | |
| 1084 | done: |
| 1085 | DriveClose(&drive, 0); |
| 1086 | return retval; |
| 1087 | } |
| 1088 | |
| 1089 | int GuidEqual(const Guid *guid1, const Guid *guid2) { |
| 1090 | return (0 == memcmp(guid1, guid2, sizeof(Guid))); |
| 1091 | } |
| 1092 | |
| 1093 | int GuidIsZero(const Guid *gp) { |
| 1094 | return GuidEqual(gp, &guid_unused); |
| 1095 | } |
| 1096 | |
| 1097 | void PMBRToStr(struct pmbr *pmbr, char *str, unsigned int buflen) { |
| 1098 | char buf[GUID_STRLEN37]; |
| 1099 | if (GuidIsZero(&pmbr->boot_guid)) { |
| 1100 | require(snprintf(str, buflen, "PMBR") < buflen)do { if (!(snprintf(str, buflen, "PMBR") < buflen)) { fprintf (stderr, "condition (%s) failed at %s:%d\n", "snprintf(str, buflen, \"PMBR\") < buflen" , "cgpt/cgpt_common.c", 1100); exit(1); } } while (0); |
| 1101 | } else { |
| 1102 | GuidToStr(&pmbr->boot_guid, buf, sizeof(buf)); |
| 1103 | require(snprintf(str, buflen, "PMBR (Boot GUID: %s)", buf) < buflen)do { if (!(snprintf(str, buflen, "PMBR (Boot GUID: %s)", buf) < buflen)) { fprintf(stderr, "condition (%s) failed at %s:%d\n" , "snprintf(str, buflen, \"PMBR (Boot GUID: %s)\", buf) < buflen" , "cgpt/cgpt_common.c", 1103); exit(1); } } while (0); |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | /* |
| 1108 | * This is here because some CGPT functionality is provided in libvboot_host.a |
| 1109 | * for other host utilities. GenerateGuid() is implemented (in cgpt.c which is |
| 1110 | * *not* linked into libvboot_host.a) by calling into libuuid. We don't want to |
| 1111 | * mandate libuuid as a dependency for every utilitity that wants to link |
| 1112 | * libvboot_host.a, since they usually don't use the functionality that needs |
| 1113 | * to generate new UUIDs anyway (just other functionality implemented in the |
| 1114 | * same files). |
| 1115 | */ |
| 1116 | #ifndef HAVE_MACOS |
| 1117 | __attribute__((weak)) int GenerateGuid(Guid *newguid) { return CGPT_FAILED; }; |
| 1118 | #endif |