src/ptgen.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ptgen - partition table generator
   4  * Copyright (C) 2006 by Felix Fietkau <nbd@nbd.name>
   5  *
   6  * uses parts of afdisk
   7  * Copyright (C) 2002 by David Roetzel <david@roetzel.de>
   8  *
   9  * UUID/GUID definition stolen from kernel/include/uapi/linux/uuid.h
  10  * Copyright (C) 2010, Intel Corp. Huang Ying <ying.huang@intel.com>
  11  */
  12
  13 #include <byteswap.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <stdint.h>
  21 #include <stdbool.h>
  22 #include <ctype.h>
  23 #include <inttypes.h>
  24 #include <fcntl.h>
  25 #include <stdint.h>
  26 #include "cyg_crc.h"
  27
  28 #if __BYTE_ORDER == __BIG_ENDIAN
  29 #define cpu_to_le16(x) bswap_16(x)
  30 #define cpu_to_le32(x) bswap_32(x)
  31 #define cpu_to_le64(x) bswap_64(x)
  32 #elif __BYTE_ORDER == __LITTLE_ENDIAN
  33 #define cpu_to_le16(x) (x)
  34 #define cpu_to_le32(x) (x)
  35 #define cpu_to_le64(x) (x)
  36 #else
  37 #error unknown endianness!
  38 #endif
  39
  40 #define swap(a, b) \
  41         do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
  42
  43 #define BIT(_x)         (1UL << (_x))
  44
  45 typedef struct {
  46         uint8_t b[16];
  47 } guid_t;
  48
  49 #define GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)                      \
  50 ((guid_t)                                                               \
  51 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  52    (b) & 0xff, ((b) >> 8) & 0xff,                                       \
  53    (c) & 0xff, ((c) >> 8) & 0xff,                                       \
  54    (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  55
  56 #define GUID_STRING_LENGTH      36
  57
  58 #define GPT_SIGNATURE 0x5452415020494645ULL
  59 #define GPT_REVISION 0x00010000
  60
  61 #define GUID_PARTITION_SYSTEM \
  62         GUID_INIT( 0xC12A7328, 0xF81F, 0x11d2, \
  63                         0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
  64
  65 #define GUID_PARTITION_BASIC_DATA \
  66         GUID_INIT( 0xEBD0A0A2, 0xB9E5, 0x4433, \
  67                         0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
  68
  69 #define GUID_PARTITION_BIOS_BOOT \
  70         GUID_INIT( 0x21686148, 0x6449, 0x6E6F, \
  71                         0x74, 0x4E, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49)
  72
  73 #define GUID_PARTITION_LINUX_FIT_GUID \
  74         GUID_INIT( 0xcae9be83, 0xb15f, 0x49cc, \
  75                         0x86, 0x3f, 0x08, 0x1b, 0x74, 0x4a, 0x2d, 0x93)
  76
  77 #define GUID_PARTITION_LINUX_FS_GUID \
  78         GUID_INIT( 0x0fc63daf, 0x8483, 0x4772, \
  79                         0x8e, 0x79, 0x3d, 0x69, 0xd8, 0x47, 0x7d, 0xe4)
  80
  81 #define GPT_HEADER_SIZE         92
  82 #define GPT_ENTRY_SIZE          128
  83 #define GPT_ENTRY_MAX           128
  84 #define GPT_ENTRY_NAME_SIZE     72
  85 #define GPT_SIZE                GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE
  86
  87 #define GPT_ATTR_PLAT_REQUIRED  BIT(0)
  88 #define GPT_ATTR_EFI_IGNORE     BIT(1)
  89 #define GPT_ATTR_LEGACY_BOOT    BIT(2)
  90
  91 #define GPT_HEADER_SECTOR       1
  92 #define GPT_FIRST_ENTRY_SECTOR  2
  93
  94 #define MBR_ENTRY_MAX           4
  95 #define MBR_DISK_SIGNATURE_OFFSET  440
  96 #define MBR_PARTITION_ENTRY_OFFSET 446
  97 #define MBR_BOOT_SIGNATURE_OFFSET  510
  98
  99 #define DISK_SECTOR_SIZE        512
 100
 101 /* Partition table entry */
 102 struct pte {
 103         uint8_t active;
 104         uint8_t chs_start[3];
 105         uint8_t type;
 106         uint8_t chs_end[3];
 107         uint32_t start;
 108         uint32_t length;
 109 };
 110
 111 struct partinfo {
 112         unsigned long actual_start;
 113         unsigned long start;
 114         unsigned long size;
 115         int type;
 116         int hybrid;
 117         char *name;
 118         short int required;
 119         guid_t guid;
 120 };
 121
 122 /* GPT Partition table header */
 123 struct gpth {
 124         uint64_t signature;
 125         uint32_t revision;
 126         uint32_t size;
 127         uint32_t crc32;
 128         uint32_t reserved;
 129         uint64_t self;
 130         uint64_t alternate;
 131         uint64_t first_usable;
 132         uint64_t last_usable;
 133         guid_t disk_guid;
 134         uint64_t first_entry;
 135         uint32_t entry_num;
 136         uint32_t entry_size;
 137         uint32_t entry_crc32;
 138 } __attribute__((packed));
 139
 140 /* GPT Partition table entry */
 141 struct gpte {
 142         guid_t type;
 143         guid_t guid;
 144         uint64_t start;
 145         uint64_t end;
 146         uint64_t attr;
 147         char name[GPT_ENTRY_NAME_SIZE];
 148 } __attribute__((packed));
 149
 150
 151 int verbose = 0;
 152 int active = 1;
 153 int heads = -1;
 154 int sectors = -1;
 155 int kb_align = 0;
 156 bool ignore_null_sized_partition = false;
 157 bool use_guid_partition_table = false;
 158 struct partinfo parts[GPT_ENTRY_MAX];
 159 char *filename = NULL;
 160
 161
 162 /*
 163  * parse the size argument, which is either
 164  * a simple number (K assumed) or
 165  * K, M or G
 166  *
 167  * returns the size in KByte
 168  */
 169 static long to_kbytes(const char *string)
 170 {
 171         int exp = 0;
 172         long result;
 173         char *end;
 174
 175         result = strtoul(string, &end, 0);
 176         switch (tolower(*end)) {
 177                 case 'k' :
 178                 case '\0' : exp = 0; break;
 179                 case 'm' : exp = 1; break;
 180                 case 'g' : exp = 2; break;
 181                 default: return 0;
 182         }
 183
 184         if (*end)
 185                 end++;
 186
 187         if (*end) {
 188                 fputs("garbage after end of number\n", stderr);
 189                 return 0;
 190         }
 191
 192         /* result: number + 1024^(exp) */
 193         if (exp == 0)
 194                 return result;
 195         return result * (2 << ((10 * exp) - 1));
 196 }
 197
 198 /* convert the sector number into a CHS value for the partition table */
 199 static void to_chs(long sect, unsigned char chs[3])
 200 {
 201         int c,h,s;
 202
 203         s = (sect % sectors) + 1;
 204         sect = sect / sectors;
 205         h = sect % heads;
 206         sect = sect / heads;
 207         c = sect;
 208
 209         chs[0] = h;
 210         chs[1] = s | ((c >> 2) & 0xC0);
 211         chs[2] = c & 0xFF;
 212
 213         return;
 214 }
 215
 216 /* round the sector number up to the next cylinder */
 217 static inline unsigned long round_to_cyl(long sect)
 218 {
 219         int cyl_size = heads * sectors;
 220
 221         return sect + cyl_size - (sect % cyl_size);
 222 }
 223
 224 /* round the sector number up to the kb_align boundary */
 225 static inline unsigned long round_to_kb(long sect) {
 226         return ((sect - 1) / kb_align + 1) * kb_align;
 227 }
 228
 229 /* Compute a CRC for guid partition table */
 230 static inline unsigned long gpt_crc32(void *buf, unsigned long len)
 231 {
 232         return cyg_crc32_accumulate(~0L, buf, len) ^ ~0L;
 233 }
 234
 235 /* Parse a guid string to guid_t struct */
 236 static inline int guid_parse(char *buf, guid_t *guid)
 237 {
 238         char b[4] = {0};
 239         char *p = buf;
 240         unsigned i = 0;
 241         if (strnlen(buf, GUID_STRING_LENGTH) != GUID_STRING_LENGTH)
 242                 return -1;
 243         for (i = 0; i < sizeof(guid_t); i++) {
 244                 if (*p == '-')
 245                         p++;
 246                 if (*p == '\0')
 247                         return -1;
 248                 memcpy(b, p, 2);
 249                 guid->b[i] = strtol(b, 0, 16);
 250                 p += 2;
 251         }
 252         swap(guid->b[0], guid->b[3]);
 253         swap(guid->b[1], guid->b[2]);
 254         swap(guid->b[4], guid->b[5]);
 255         swap(guid->b[6], guid->b[7]);
 256         return 0;
 257 }
 258
 259 /* init an utf-16 string from utf-8 string */
 260 static inline void init_utf16(char *str, uint16_t *buf, unsigned bufsize)
 261 {
 262         unsigned i, n = 0;
 263         for (i = 0; i < bufsize; i++) {
 264                 if (str[n] == 0x00) {
 265                         buf[i] = 0x00;
 266                         return ;
 267                 } else if ((str[n] & 0x80) == 0x00) {//0xxxxxxx
 268                         buf[i] = cpu_to_le16(str[n++]);
 269                 } else if ((str[n] & 0xE0) == 0xC0) {//110xxxxx
 270                         buf[i] = cpu_to_le16((str[n] & 0x1F) << 6 | (str[n + 1] & 0x3F));
 271                         n += 2;
 272                 } else if ((str[n] & 0xF0) == 0xE0) {//1110xxxx
 273                         buf[i] = cpu_to_le16((str[n] & 0x0F) << 12 | (str[n + 1] & 0x3F) << 6 | (str[n + 2] & 0x3F));
 274                         n += 3;
 275                 } else {
 276                         buf[i] = cpu_to_le16('?');
 277                         n++;
 278                 }
 279         }
 280 }
 281
 282 /* check the partition sizes and write the partition table */
 283 static int gen_ptable(uint32_t signature, int nr)
 284 {
 285         struct pte pte[MBR_ENTRY_MAX];
 286         unsigned long start, len, sect = 0;
 287         int i, fd, ret = -1;
 288
 289         memset(pte, 0, sizeof(struct pte) * MBR_ENTRY_MAX);
 290         for (i = 0; i < nr; i++) {
 291                 if (!parts[i].size) {
 292                         if (ignore_null_sized_partition)
 293                                 continue;
 294                         fprintf(stderr, "Invalid size in partition %d!\n", i);
 295                         return ret;
 296                 }
 297
 298                 pte[i].active = ((i + 1) == active) ? 0x80 : 0;
 299                 pte[i].type = parts[i].type;
 300
 301                 start = sect + sectors;
 302                 if (parts[i].start != 0) {
 303                         if (parts[i].start * 2 < start) {
 304                                 fprintf(stderr, "Invalid start %ld for partition %d!\n",
 305                                         parts[i].start, i);
 306                                 return ret;
 307                         }
 308                         start = parts[i].start * 2;
 309                 } else if (kb_align != 0) {
 310                         start = round_to_kb(start);
 311                 }
 312                 pte[i].start = cpu_to_le32(start);
 313
 314                 sect = start + parts[i].size * 2;
 315                 if (kb_align == 0)
 316                         sect = round_to_cyl(sect);
 317                 pte[i].length = cpu_to_le32(len = sect - start);
 318
 319                 to_chs(start, pte[i].chs_start);
 320                 to_chs(start + len - 1, pte[i].chs_end);
 321
 322                 if (verbose)
 323                         fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n",
 324                                         i,
 325                                         (long)start * DISK_SECTOR_SIZE,
 326                                         (long)(start + len) * DISK_SECTOR_SIZE,
 327                                         (long)len * DISK_SECTOR_SIZE);
 328                 printf("%ld\n", (long)start * DISK_SECTOR_SIZE);
 329                 printf("%ld\n", (long)len * DISK_SECTOR_SIZE);
 330         }
 331
 332         if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
 333                 fprintf(stderr, "Can't open output file '%s'\n",filename);
 334                 return ret;
 335         }
 336
 337         lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
 338         if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
 339                 fputs("write failed.\n", stderr);
 340                 goto fail;
 341         }
 342
 343         lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
 344         if (write(fd, pte, sizeof(struct pte) * MBR_ENTRY_MAX) != sizeof(struct pte) * MBR_ENTRY_MAX) {
 345                 fputs("write failed.\n", stderr);
 346                 goto fail;
 347         }
 348         lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
 349         if (write(fd, "\x55\xaa", 2) != 2) {
 350                 fputs("write failed.\n", stderr);
 351                 goto fail;
 352         }
 353
 354         ret = 0;
 355 fail:
 356         close(fd);
 357         return ret;
 358 }
 359
 360 /* check the partition sizes and write the guid partition table */
 361 static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
 362 {
 363         struct pte pte[MBR_ENTRY_MAX];
 364         struct gpth gpth = {
 365                 .signature = cpu_to_le64(GPT_SIGNATURE),
 366                 .revision = cpu_to_le32(GPT_REVISION),
 367                 .size = cpu_to_le32(GPT_HEADER_SIZE),
 368                 .self = cpu_to_le64(GPT_HEADER_SECTOR),
 369                 .first_usable = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
 370                 .first_entry = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR),
 371                 .disk_guid = guid,
 372                 .entry_num = cpu_to_le32(GPT_ENTRY_MAX),
 373                 .entry_size = cpu_to_le32(GPT_ENTRY_SIZE),
 374         };
 375         struct gpte  gpte[GPT_ENTRY_MAX];
 376         uint64_t start, end;
 377         uint64_t sect = GPT_SIZE + GPT_FIRST_ENTRY_SECTOR;
 378         int fd, ret = -1;
 379         unsigned i, pmbr = 1;
 380
 381         memset(pte, 0, sizeof(struct pte) * MBR_ENTRY_MAX);
 382         memset(gpte, 0, GPT_ENTRY_SIZE * GPT_ENTRY_MAX);
 383         for (i = 0; i < nr; i++) {
 384                 if (!parts[i].size) {
 385                         if (ignore_null_sized_partition)
 386                                 continue;
 387                         fprintf(stderr, "Invalid size in partition %d!\n", i);
 388                         return ret;
 389                 }
 390                 start = sect;
 391                 if (parts[i].start != 0) {
 392                         if (parts[i].start * 2 < start) {
 393                                 fprintf(stderr, "Invalid start %ld for partition %d!\n",
 394                                         parts[i].start, i);
 395                                 return ret;
 396                         }
 397                         start = parts[i].start * 2;
 398                 } else if (kb_align != 0) {
 399                         start = round_to_kb(start);
 400                 }
 401                 parts[i].actual_start = start;
 402                 gpte[i].start = cpu_to_le64(start);
 403
 404                 sect = start + parts[i].size * 2;
 405                 gpte[i].end = cpu_to_le64(sect -1);
 406                 gpte[i].guid = guid;
 407                 gpte[i].guid.b[sizeof(guid_t) -1] += i + 1;
 408                 gpte[i].type = parts[i].guid;
 409
 410                 if (parts[i].hybrid && pmbr < MBR_ENTRY_MAX) {
 411                         pte[pmbr].active = ((i + 1) == active) ? 0x80 : 0;
 412                         pte[pmbr].type = parts[i].type;
 413                         pte[pmbr].start = cpu_to_le32(start);
 414                         pte[pmbr].length = cpu_to_le32(sect - start);
 415                         to_chs(start, pte[1].chs_start);
 416                         to_chs(sect - 1, pte[1].chs_end);
 417                         pmbr++;
 418                 }
 419
 420                 if (parts[i].name)
 421                         init_utf16(parts[i].name, (uint16_t *)gpte[i].name, GPT_ENTRY_NAME_SIZE / sizeof(uint16_t));
 422
 423                 if ((i + 1) == (unsigned)active)
 424                         gpte[i].attr |= GPT_ATTR_LEGACY_BOOT;
 425
 426                 if (parts[i].required)
 427                         gpte[i].attr |= GPT_ATTR_PLAT_REQUIRED;
 428
 429                 if (verbose)
 430                         fprintf(stderr, "Partition %d: start=%" PRIu64 ", end=%" PRIu64 ", size=%"  PRIu64 "\n",
 431                                         i,
 432                                         start * DISK_SECTOR_SIZE, sect * DISK_SECTOR_SIZE,
 433                                         (sect - start) * DISK_SECTOR_SIZE);
 434                 printf("%" PRIu64 "\n", start * DISK_SECTOR_SIZE);
 435                 printf("%" PRIu64 "\n", (sect - start) * DISK_SECTOR_SIZE);
 436         }
 437
 438         if (parts[0].actual_start > GPT_FIRST_ENTRY_SECTOR + GPT_SIZE) {
 439                 gpte[GPT_ENTRY_MAX - 1].start = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_SIZE);
 440                 gpte[GPT_ENTRY_MAX - 1].end = cpu_to_le64(parts[0].actual_start - 1);
 441                 gpte[GPT_ENTRY_MAX - 1].type = GUID_PARTITION_BIOS_BOOT;
 442                 gpte[GPT_ENTRY_MAX - 1].guid = guid;
 443                 gpte[GPT_ENTRY_MAX - 1].guid.b[sizeof(guid_t) -1] += GPT_ENTRY_MAX;
 444         }
 445
 446         end = sect + GPT_SIZE;
 447
 448         pte[0].type = 0xEE;
 449         pte[0].start = cpu_to_le32(GPT_HEADER_SECTOR);
 450         pte[0].length = cpu_to_le32(end - GPT_HEADER_SECTOR);
 451         to_chs(GPT_HEADER_SECTOR, pte[0].chs_start);
 452         to_chs(end, pte[0].chs_end);
 453
 454         gpth.last_usable = cpu_to_le64(end - GPT_SIZE - 1);
 455         gpth.alternate = cpu_to_le64(end);
 456         gpth.entry_crc32 = cpu_to_le32(gpt_crc32(gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX));
 457         gpth.crc32 = cpu_to_le32(gpt_crc32((char *)&gpth, GPT_HEADER_SIZE));
 458
 459         if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
 460                 fprintf(stderr, "Can't open output file '%s'\n",filename);
 461                 return ret;
 462         }
 463
 464         lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
 465         if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
 466                 fputs("write failed.\n", stderr);
 467                 goto fail;
 468         }
 469
 470         lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
 471         if (write(fd, pte, sizeof(struct pte) * MBR_ENTRY_MAX) != sizeof(struct pte) * MBR_ENTRY_MAX) {
 472                 fputs("write failed.\n", stderr);
 473                 goto fail;
 474         }
 475
 476         lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
 477         if (write(fd, "\x55\xaa", 2) != 2) {
 478                 fputs("write failed.\n", stderr);
 479                 goto fail;
 480         }
 481
 482         if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
 483                 fputs("write failed.\n", stderr);
 484                 goto fail;
 485         }
 486
 487         lseek(fd, GPT_FIRST_ENTRY_SECTOR * DISK_SECTOR_SIZE, SEEK_SET);
 488         if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
 489                 fputs("write failed.\n", stderr);
 490                 goto fail;
 491         }
 492
 493 #ifdef WANT_ALTERNATE_PTABLE
 494         /* The alternate partition table (We omit it by default) */
 495         swap(gpth.self, gpth.alternate);
 496         gpth.first_entry = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
 497         gpth.crc32 = 0;
 498         gpth.crc32 = cpu_to_le32(gpt_crc32(&gpth, GPT_HEADER_SIZE));
 499
 500         lseek(fd, end * DISK_SECTOR_SIZE - GPT_ENTRY_SIZE * GPT_ENTRY_MAX, SEEK_SET);
 501         if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
 502                 fputs("write failed.\n", stderr);
 503                 goto fail;
 504         }
 505
 506         lseek(fd, end * DISK_SECTOR_SIZE, SEEK_SET);
 507         if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
 508                 fputs("write failed.\n", stderr);
 509                 goto fail;
 510         }
 511         lseek(fd, (end + 1) * DISK_SECTOR_SIZE -1, SEEK_SET);
 512         if (write(fd, "\x00", 1) != 1) {
 513                 fputs("write failed.\n", stderr);
 514                 goto fail;
 515         }
 516 #endif
 517
 518         ret = 0;
 519 fail:
 520         close(fd);
 521         return ret;
 522 }
 523
 524 static void usage(char *prog)
 525 {
 526         fprintf(stderr, "Usage: %s [-v] [-n] [-g] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [-l <align kB>] [-G <guid>] [[-t <type>] [-r] [-N <name>] -p <size>[@<start>]...] \n", prog);
 527         exit(EXIT_FAILURE);
 528 }
 529
 530 static guid_t type_to_guid_and_name(unsigned char type, char **name)
 531 {
 532         guid_t guid = GUID_PARTITION_BASIC_DATA;
 533
 534         switch (type) {
 535                 case 0xef:
 536                         if(*name == NULL)
 537                                 *name = "EFI System Partition";
 538                         guid = GUID_PARTITION_SYSTEM;
 539                         break;
 540                 case 0x83:
 541                         guid = GUID_PARTITION_LINUX_FS_GUID;
 542                         break;
 543                 case 0x2e:
 544                         guid = GUID_PARTITION_LINUX_FIT_GUID;
 545                         break;
 546         }
 547
 548         return guid;
 549 }
 550
 551 int main (int argc, char **argv)
 552 {
 553         unsigned char type = 0x83;
 554         char *p;
 555         int ch;
 556         int part = 0;
 557         char *name = NULL;
 558         unsigned short int hybrid = 0, required = 0;
 559         uint32_t signature = 0x5452574F; /* 'OWRT' */
 560         guid_t guid = GUID_INIT( signature, 0x2211, 0x4433, \
 561                         0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0x00);
 562         guid_t part_guid = GUID_PARTITION_BASIC_DATA;
 563
 564         while ((ch = getopt(argc, argv, "h:s:p:a:t:o:vnHN:gl:rS:G:")) != -1) {
 565                 switch (ch) {
 566                 case 'o':
 567                         filename = optarg;
 568                         break;
 569                 case 'v':
 570                         verbose++;
 571                         break;
 572                 case 'n':
 573                         ignore_null_sized_partition = true;
 574                         break;
 575                 case 'g':
 576                         use_guid_partition_table = 1;
 577                         break;
 578                 case 'H':
 579                         hybrid = 1;
 580                         break;
 581                 case 'h':
 582                         heads = (int)strtoul(optarg, NULL, 0);
 583                         break;
 584                 case 's':
 585                         sectors = (int)strtoul(optarg, NULL, 0);
 586                         break;
 587                 case 'p':
 588                         if (part > GPT_ENTRY_MAX - 1 || (!use_guid_partition_table && part > 3)) {
 589                                 fputs("Too many partitions\n", stderr);
 590                                 exit(EXIT_FAILURE);
 591                         }
 592                         p = strchr(optarg, '@');
 593                         if (p) {
 594                                 *(p++) = 0;
 595                                 parts[part].start = to_kbytes(p);
 596                         }
 597                         part_guid = type_to_guid_and_name(type, &name);
 598                         parts[part].size = to_kbytes(optarg);
 599                         parts[part].required = required;
 600                         parts[part].name = name;
 601                         parts[part].hybrid = hybrid;
 602                         parts[part].guid = part_guid;
 603                         fprintf(stderr, "part %ld %ld\n", parts[part].start, parts[part].size);
 604                         parts[part++].type = type;
 605                         /*
 606                          * reset 'name','required' and 'hybrid'
 607                          * 'type' is deliberately inherited from the previous delcaration
 608                          */
 609                         name = NULL;
 610                         required = 0;
 611                         hybrid = 0;
 612                         break;
 613                 case 'N':
 614                         name = optarg;
 615                         break;
 616                 case 'r':
 617                         required = 1;
 618                         break;
 619                 case 't':
 620                         type = (char)strtoul(optarg, NULL, 16);
 621                         break;
 622                 case 'a':
 623                         active = (int)strtoul(optarg, NULL, 0);
 624                         if ((active < 0) || (active > 4))
 625                                 active = 0;
 626                         break;
 627                 case 'l':
 628                         kb_align = (int)strtoul(optarg, NULL, 0) * 2;
 629                         break;
 630                 case 'S':
 631                         signature = strtoul(optarg, NULL, 0);
 632                         break;
 633                 case 'G':
 634                         if (guid_parse(optarg, &guid)) {
 635                                 fputs("Invalid guid string\n", stderr);
 636                                 exit(EXIT_FAILURE);
 637                         }
 638                         break;
 639                 case '?':
 640                 default:
 641                         usage(argv[0]);
 642                 }
 643         }
 644         argc -= optind;
 645         if (argc || (!use_guid_partition_table && ((heads <= 0) || (sectors <= 0))) || !filename)
 646                 usage(argv[0]);
 647
 648         if (use_guid_partition_table) {
 649                 heads = 254;
 650                 sectors = 63;
 651                 return gen_gptable(signature, guid, part) ? EXIT_FAILURE : EXIT_SUCCESS;
 652         }
 653
 654         return gen_ptable(signature, part) ? EXIT_FAILURE : EXIT_SUCCESS;
 655 }