tools/firmware-utils/src/ptgen.c

   1 /*
   2  * ptgen - partition table generator
   3  * Copyright (C) 2006 by Felix Fietkau <nbd@nbd.name>
   4  *
   5  * uses parts of afdisk
   6  * Copyright (C) 2002 by David Roetzel <david@roetzel.de>
   7  *
   8  * UUID/GUID definition stolen from kernel/include/uapi/linux/uuid.h
   9  * Copyright (C) 2010, Intel Corp. Huang Ying <ying.huang@intel.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  24  */
  25
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <stdint.h>
  33 #include <stdbool.h>
  34 #include <ctype.h>
  35 #include <inttypes.h>
  36 #include <fcntl.h>
  37 #include <stdint.h>
  38 #include "cyg_crc.h"
  39
  40 #if __BYTE_ORDER == __BIG_ENDIAN
  41 #define cpu_to_le16(x) bswap_16(x)
  42 #define cpu_to_le32(x) bswap_32(x)
  43 #define cpu_to_le64(x) bswap_64(x)
  44 #elif __BYTE_ORDER == __LITTLE_ENDIAN
  45 #define cpu_to_le16(x) (x)
  46 #define cpu_to_le32(x) (x)
  47 #define cpu_to_le64(x) (x)
  48 #else
  49 #error unknown endianness!
  50 #endif
  51
  52 #define swap(a, b) \
  53         do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
  54
  55 #define BIT(_x)         (1UL << (_x))
  56
  57 typedef struct {
  58         uint8_t b[16];
  59 } guid_t;
  60
  61 #define GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7)                      \
  62 ((guid_t)                                                               \
  63 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
  64    (b) & 0xff, ((b) >> 8) & 0xff,                                       \
  65    (c) & 0xff, ((c) >> 8) & 0xff,                                       \
  66    (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
  67
  68 #define GUID_STRING_LENGTH      36
  69
  70 #define GPT_SIGNATURE 0x5452415020494645ULL
  71 #define GPT_REVISION 0x00010000
  72
  73 #define GUID_PARTITION_SYSTEM \
  74         GUID_INIT( 0xC12A7328, 0xF81F, 0x11d2, \
  75                         0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
  76
  77 #define GUID_PARTITION_BASIC_DATA \
  78         GUID_INIT( 0xEBD0A0A2, 0xB9E5, 0x4433, \
  79                         0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
  80
  81 #define GUID_PARTITION_BIOS_BOOT \
  82         GUID_INIT( 0x21686148, 0x6449, 0x6E6F, \
  83                         0x74, 0x4E, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49)
  84
  85 #define GUID_PARTITION_LINUX_FIT_GUID \
  86         GUID_INIT( 0xcae9be83, 0xb15f, 0x49cc, \
  87                         0x86, 0x3f, 0x08, 0x1b, 0x74, 0x4a, 0x2d, 0x93)
  88
  89 #define GUID_PARTITION_LINUX_FS_GUID \
  90         GUID_INIT( 0x0fc63daf, 0x8483, 0x4772, \
  91                         0x8e, 0x79, 0x3d, 0x69, 0xd8, 0x47, 0x7d, 0xe4)
  92
  93 #define GPT_HEADER_SIZE         92
  94 #define GPT_ENTRY_SIZE          128
  95 #define GPT_ENTRY_MAX           128
  96 #define GPT_ENTRY_NAME_SIZE     72
  97 #define GPT_SIZE                GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE
  98
  99 #define GPT_ATTR_PLAT_REQUIRED  BIT(0)
 100 #define GPT_ATTR_EFI_IGNORE     BIT(1)
 101 #define GPT_ATTR_LEGACY_BOOT    BIT(2)
 102
 103 #define GPT_HEADER_SECTOR       1
 104 #define GPT_FIRST_ENTRY_SECTOR  2
 105
 106 #define MBR_ENTRY_MAX           4
 107 #define MBR_DISK_SIGNATURE_OFFSET  440
 108 #define MBR_PARTITION_ENTRY_OFFSET 446
 109 #define MBR_BOOT_SIGNATURE_OFFSET  510
 110
 111 #define DISK_SECTOR_SIZE        512
 112
 113 /* Partition table entry */
 114 struct pte {
 115         uint8_t active;
 116         uint8_t chs_start[3];
 117         uint8_t type;
 118         uint8_t chs_end[3];
 119         uint32_t start;
 120         uint32_t length;
 121 };
 122
 123 struct partinfo {
 124         unsigned long actual_start;
 125         unsigned long start;
 126         unsigned long size;
 127         int type;
 128         int hybrid;
 129         char *name;
 130         short int required;
 131         guid_t guid;
 132 };
 133
 134 /* GPT Partition table header */
 135 struct gpth {
 136         uint64_t signature;
 137         uint32_t revision;
 138         uint32_t size;
 139         uint32_t crc32;
 140         uint32_t reserved;
 141         uint64_t self;
 142         uint64_t alternate;
 143         uint64_t first_usable;
 144         uint64_t last_usable;
 145         guid_t disk_guid;
 146         uint64_t first_entry;
 147         uint32_t entry_num;
 148         uint32_t entry_size;
 149         uint32_t entry_crc32;
 150 } __attribute__((packed));
 151
 152 /* GPT Partition table entry */
 153 struct gpte {
 154         guid_t type;
 155         guid_t guid;
 156         uint64_t start;
 157         uint64_t end;
 158         uint64_t attr;
 159         char name[GPT_ENTRY_NAME_SIZE];
 160 } __attribute__((packed));
 161
 162
 163 int verbose = 0;
 164 int active = 1;
 165 int heads = -1;
 166 int sectors = -1;
 167 int kb_align = 0;
 168 bool ignore_null_sized_partition = false;
 169 bool use_guid_partition_table = false;
 170 struct partinfo parts[GPT_ENTRY_MAX];
 171 char *filename = NULL;
 172
 173
 174 /*
 175  * parse the size argument, which is either
 176  * a simple number (K assumed) or
 177  * K, M or G
 178  *
 179  * returns the size in KByte
 180  */
 181 static long to_kbytes(const char *string)
 182 {
 183         int exp = 0;
 184         long result;
 185         char *end;
 186
 187         result = strtoul(string, &end, 0);
 188         switch (tolower(*end)) {
 189                 case 'k' :
 190                 case '\0' : exp = 0; break;
 191                 case 'm' : exp = 1; break;
 192                 case 'g' : exp = 2; break;
 193                 default: return 0;
 194         }
 195
 196         if (*end)
 197                 end++;
 198
 199         if (*end) {
 200                 fputs("garbage after end of number\n", stderr);
 201                 return 0;
 202         }
 203
 204         /* result: number + 1024^(exp) */
 205         if (exp == 0)
 206                 return result;
 207         return result * (2 << ((10 * exp) - 1));
 208 }
 209
 210 /* convert the sector number into a CHS value for the partition table */
 211 static void to_chs(long sect, unsigned char chs[3])
 212 {
 213         int c,h,s;
 214
 215         s = (sect % sectors) + 1;
 216         sect = sect / sectors;
 217         h = sect % heads;
 218         sect = sect / heads;
 219         c = sect;
 220
 221         chs[0] = h;
 222         chs[1] = s | ((c >> 2) & 0xC0);
 223         chs[2] = c & 0xFF;
 224
 225         return;
 226 }
 227
 228 /* round the sector number up to the next cylinder */
 229 static inline unsigned long round_to_cyl(long sect)
 230 {
 231         int cyl_size = heads * sectors;
 232
 233         return sect + cyl_size - (sect % cyl_size);
 234 }
 235
 236 /* round the sector number up to the kb_align boundary */
 237 static inline unsigned long round_to_kb(long sect) {
 238         return ((sect - 1) / kb_align + 1) * kb_align;
 239 }
 240
 241 /* Compute a CRC for guid partition table */
 242 static inline unsigned long gpt_crc32(void *buf, unsigned long len)
 243 {
 244         return cyg_crc32_accumulate(~0L, buf, len) ^ ~0L;
 245 }
 246
 247 /* Parse a guid string to guid_t struct */
 248 static inline int guid_parse(char *buf, guid_t *guid)
 249 {
 250         char b[4] = {0};
 251         char *p = buf;
 252         unsigned i = 0;
 253         if (strnlen(buf, GUID_STRING_LENGTH) != GUID_STRING_LENGTH)
 254                 return -1;
 255         for (i = 0; i < sizeof(guid_t); i++) {
 256                 if (*p == '-')
 257                         p++;
 258                 if (*p == '\0')
 259                         return -1;
 260                 memcpy(b, p, 2);
 261                 guid->b[i] = strtol(b, 0, 16);
 262                 p += 2;
 263         }
 264         swap(guid->b[0], guid->b[3]);
 265         swap(guid->b[1], guid->b[2]);
 266         swap(guid->b[4], guid->b[5]);
 267         swap(guid->b[6], guid->b[7]);
 268         return 0;
 269 }
 270
 271 /* init an utf-16 string from utf-8 string */
 272 static inline void init_utf16(char *str, uint16_t *buf, unsigned bufsize)
 273 {
 274         unsigned i, n = 0;
 275         for (i = 0; i < bufsize; i++) {
 276                 if (str[n] == 0x00) {
 277                         buf[i] = 0x00;
 278                         return ;
 279                 } else if ((str[n] & 0x80) == 0x00) {//0xxxxxxx
 280                         buf[i] = cpu_to_le16(str[n++]);
 281                 } else if ((str[n] & 0xE0) == 0xC0) {//110xxxxx
 282                         buf[i] = cpu_to_le16((str[n] & 0x1F) << 6 | (str[n + 1] & 0x3F));
 283                         n += 2;
 284                 } else if ((str[n] & 0xF0) == 0xE0) {//1110xxxx
 285                         buf[i] = cpu_to_le16((str[n] & 0x0F) << 12 | (str[n + 1] & 0x3F) << 6 | (str[n + 2] & 0x3F));
 286                         n += 3;
 287                 } else {
 288                         buf[i] = cpu_to_le16('?');
 289                         n++;
 290                 }
 291         }
 292 }
 293
 294 /* check the partition sizes and write the partition table */
 295 static int gen_ptable(uint32_t signature, int nr)
 296 {
 297         struct pte pte[MBR_ENTRY_MAX];
 298         unsigned long start, len, sect = 0;
 299         int i, fd, ret = -1;
 300
 301         memset(pte, 0, sizeof(struct pte) * MBR_ENTRY_MAX);
 302         for (i = 0; i < nr; i++) {
 303                 if (!parts[i].size) {
 304                         if (ignore_null_sized_partition)
 305                                 continue;
 306                         fprintf(stderr, "Invalid size in partition %d!\n", i);
 307                         return ret;
 308                 }
 309
 310                 pte[i].active = ((i + 1) == active) ? 0x80 : 0;
 311                 pte[i].type = parts[i].type;
 312
 313                 start = sect + sectors;
 314                 if (parts[i].start != 0) {
 315                         if (parts[i].start * 2 < start) {
 316                                 fprintf(stderr, "Invalid start %ld for partition %d!\n",
 317                                         parts[i].start, i);
 318                                 return ret;
 319                         }
 320                         start = parts[i].start * 2;
 321                 } else if (kb_align != 0) {
 322                         start = round_to_kb(start);
 323                 }
 324                 pte[i].start = cpu_to_le32(start);
 325
 326                 sect = start + parts[i].size * 2;
 327                 if (kb_align == 0)
 328                         sect = round_to_cyl(sect);
 329                 pte[i].length = cpu_to_le32(len = sect - start);
 330
 331                 to_chs(start, pte[i].chs_start);
 332                 to_chs(start + len - 1, pte[i].chs_end);
 333
 334                 if (verbose)
 335                         fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n",
 336                                         i,
 337                                         (long)start * DISK_SECTOR_SIZE,
 338                                         (long)(start + len) * DISK_SECTOR_SIZE,
 339                                         (long)len * DISK_SECTOR_SIZE);
 340                 printf("%ld\n", (long)start * DISK_SECTOR_SIZE);
 341                 printf("%ld\n", (long)len * DISK_SECTOR_SIZE);
 342         }
 343
 344         if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
 345                 fprintf(stderr, "Can't open output file '%s'\n",filename);
 346                 return ret;
 347         }
 348
 349         lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
 350         if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
 351                 fputs("write failed.\n", stderr);
 352                 goto fail;
 353         }
 354
 355         lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
 356         if (write(fd, pte, sizeof(struct pte) * MBR_ENTRY_MAX) != sizeof(struct pte) * MBR_ENTRY_MAX) {
 357                 fputs("write failed.\n", stderr);
 358                 goto fail;
 359         }
 360         lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
 361         if (write(fd, "\x55\xaa", 2) != 2) {
 362                 fputs("write failed.\n", stderr);
 363                 goto fail;
 364         }
 365
 366         ret = 0;
 367 fail:
 368         close(fd);
 369         return ret;
 370 }
 371
 372 /* check the partition sizes and write the guid partition table */
 373 static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
 374 {
 375         struct pte pte[MBR_ENTRY_MAX];
 376         struct gpth gpth = {
 377                 .signature = cpu_to_le64(GPT_SIGNATURE),
 378                 .revision = cpu_to_le32(GPT_REVISION),
 379                 .size = cpu_to_le32(GPT_HEADER_SIZE),
 380                 .self = cpu_to_le64(GPT_HEADER_SECTOR),
 381                 .first_usable = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
 382                 .first_entry = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR),
 383                 .disk_guid = guid,
 384                 .entry_num = cpu_to_le32(GPT_ENTRY_MAX),
 385                 .entry_size = cpu_to_le32(GPT_ENTRY_SIZE),
 386         };
 387         struct gpte  gpte[GPT_ENTRY_MAX];
 388         uint64_t start, end;
 389         uint64_t sect = GPT_SIZE + GPT_FIRST_ENTRY_SECTOR;
 390         int fd, ret = -1;
 391         unsigned i, pmbr = 1;
 392
 393         memset(pte, 0, sizeof(struct pte) * MBR_ENTRY_MAX);
 394         memset(gpte, 0, GPT_ENTRY_SIZE * GPT_ENTRY_MAX);
 395         for (i = 0; i < nr; i++) {
 396                 if (!parts[i].size) {
 397                         if (ignore_null_sized_partition)
 398                                 continue;
 399                         fprintf(stderr, "Invalid size in partition %d!\n", i);
 400                         return ret;
 401                 }
 402                 start = sect;
 403                 if (parts[i].start != 0) {
 404                         if (parts[i].start * 2 < start) {
 405                                 fprintf(stderr, "Invalid start %ld for partition %d!\n",
 406                                         parts[i].start, i);
 407                                 return ret;
 408                         }
 409                         start = parts[i].start * 2;
 410                 } else if (kb_align != 0) {
 411                         start = round_to_kb(start);
 412                 }
 413                 parts[i].actual_start = start;
 414                 gpte[i].start = cpu_to_le64(start);
 415
 416                 sect = start + parts[i].size * 2;
 417                 gpte[i].end = cpu_to_le64(sect -1);
 418                 gpte[i].guid = guid;
 419                 gpte[i].guid.b[sizeof(guid_t) -1] += i + 1;
 420                 gpte[i].type = parts[i].guid;
 421
 422                 if (parts[i].hybrid && pmbr < MBR_ENTRY_MAX) {
 423                         pte[pmbr].active = ((i + 1) == active) ? 0x80 : 0;
 424                         pte[pmbr].type = parts[i].type;
 425                         pte[pmbr].start = cpu_to_le32(start);
 426                         pte[pmbr].length = cpu_to_le32(sect - start);
 427                         to_chs(start, pte[1].chs_start);
 428                         to_chs(sect - 1, pte[1].chs_end);
 429                         pmbr++;
 430                 }
 431
 432                 if (parts[i].name)
 433                         init_utf16(parts[i].name, (uint16_t *)gpte[i].name, GPT_ENTRY_NAME_SIZE / sizeof(uint16_t));
 434
 435                 if ((i + 1) == (unsigned)active)
 436                         gpte[i].attr |= GPT_ATTR_LEGACY_BOOT;
 437
 438                 if (parts[i].required)
 439                         gpte[i].attr |= GPT_ATTR_PLAT_REQUIRED;
 440
 441                 if (verbose)
 442                         fprintf(stderr, "Partition %d: start=%" PRIu64 ", end=%" PRIu64 ", size=%"  PRIu64 "\n",
 443                                         i,
 444                                         start * DISK_SECTOR_SIZE, sect * DISK_SECTOR_SIZE,
 445                                         (sect - start) * DISK_SECTOR_SIZE);
 446                 printf("%" PRIu64 "\n", start * DISK_SECTOR_SIZE);
 447                 printf("%" PRIu64 "\n", (sect - start) * DISK_SECTOR_SIZE);
 448         }
 449
 450         if (parts[0].actual_start > GPT_FIRST_ENTRY_SECTOR + GPT_SIZE) {
 451                 gpte[GPT_ENTRY_MAX - 1].start = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_SIZE);
 452                 gpte[GPT_ENTRY_MAX - 1].end = cpu_to_le64(parts[0].actual_start - 1);
 453                 gpte[GPT_ENTRY_MAX - 1].type = GUID_PARTITION_BIOS_BOOT;
 454                 gpte[GPT_ENTRY_MAX - 1].guid = guid;
 455                 gpte[GPT_ENTRY_MAX - 1].guid.b[sizeof(guid_t) -1] += GPT_ENTRY_MAX;
 456         }
 457
 458         end = sect + GPT_SIZE;
 459
 460         pte[0].type = 0xEE;
 461         pte[0].start = cpu_to_le32(GPT_HEADER_SECTOR);
 462         pte[0].length = cpu_to_le32(end - GPT_HEADER_SECTOR);
 463         to_chs(GPT_HEADER_SECTOR, pte[0].chs_start);
 464         to_chs(end, pte[0].chs_end);
 465
 466         gpth.last_usable = cpu_to_le64(end - GPT_SIZE - 1);
 467         gpth.alternate = cpu_to_le64(end);
 468         gpth.entry_crc32 = cpu_to_le32(gpt_crc32(gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX));
 469         gpth.crc32 = cpu_to_le32(gpt_crc32((char *)&gpth, GPT_HEADER_SIZE));
 470
 471         if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
 472                 fprintf(stderr, "Can't open output file '%s'\n",filename);
 473                 return ret;
 474         }
 475
 476         lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
 477         if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
 478                 fputs("write failed.\n", stderr);
 479                 goto fail;
 480         }
 481
 482         lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
 483         if (write(fd, pte, sizeof(struct pte) * MBR_ENTRY_MAX) != sizeof(struct pte) * MBR_ENTRY_MAX) {
 484                 fputs("write failed.\n", stderr);
 485                 goto fail;
 486         }
 487
 488         lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
 489         if (write(fd, "\x55\xaa", 2) != 2) {
 490                 fputs("write failed.\n", stderr);
 491                 goto fail;
 492         }
 493
 494         if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
 495                 fputs("write failed.\n", stderr);
 496                 goto fail;
 497         }
 498
 499         lseek(fd, GPT_FIRST_ENTRY_SECTOR * DISK_SECTOR_SIZE, SEEK_SET);
 500         if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
 501                 fputs("write failed.\n", stderr);
 502                 goto fail;
 503         }
 504
 505 #ifdef WANT_ALTERNATE_PTABLE
 506         /* The alternate partition table (We omit it by default) */
 507         swap(gpth.self, gpth.alternate);
 508         gpth.first_entry = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
 509         gpth.crc32 = 0;
 510         gpth.crc32 = cpu_to_le32(gpt_crc32(&gpth, GPT_HEADER_SIZE));
 511
 512         lseek(fd, end * DISK_SECTOR_SIZE - GPT_ENTRY_SIZE * GPT_ENTRY_MAX, SEEK_SET);
 513         if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
 514                 fputs("write failed.\n", stderr);
 515                 goto fail;
 516         }
 517
 518         lseek(fd, end * DISK_SECTOR_SIZE, SEEK_SET);
 519         if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
 520                 fputs("write failed.\n", stderr);
 521                 goto fail;
 522         }
 523         lseek(fd, (end + 1) * DISK_SECTOR_SIZE -1, SEEK_SET);
 524         if (write(fd, "\x00", 1) != 1) {
 525                 fputs("write failed.\n", stderr);
 526                 goto fail;
 527         }
 528 #endif
 529
 530         ret = 0;
 531 fail:
 532         close(fd);
 533         return ret;
 534 }
 535
 536 static void usage(char *prog)
 537 {
 538         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);
 539         exit(EXIT_FAILURE);
 540 }
 541
 542 static guid_t type_to_guid_and_name(unsigned char type, char **name)
 543 {
 544         guid_t guid = GUID_PARTITION_BASIC_DATA;
 545
 546         switch (type) {
 547                 case 0xef:
 548                         if(*name == NULL)
 549                                 *name = "EFI System Partition";
 550                         guid = GUID_PARTITION_SYSTEM;
 551                         break;
 552                 case 0x83:
 553                         guid = GUID_PARTITION_LINUX_FS_GUID;
 554                         break;
 555                 case 0x2e:
 556                         guid = GUID_PARTITION_LINUX_FIT_GUID;
 557                         break;
 558         }
 559
 560         return guid;
 561 }
 562
 563 int main (int argc, char **argv)
 564 {
 565         unsigned char type = 0x83;
 566         char *p;
 567         int ch;
 568         int part = 0;
 569         char *name = NULL;
 570         unsigned short int hybrid = 0, required = 0;
 571         uint32_t signature = 0x5452574F; /* 'OWRT' */
 572         guid_t guid = GUID_INIT( signature, 0x2211, 0x4433, \
 573                         0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0x00);
 574         guid_t part_guid = GUID_PARTITION_BASIC_DATA;
 575
 576         while ((ch = getopt(argc, argv, "h:s:p:a:t:o:vnHN:gl:rS:G:")) != -1) {
 577                 switch (ch) {
 578                 case 'o':
 579                         filename = optarg;
 580                         break;
 581                 case 'v':
 582                         verbose++;
 583                         break;
 584                 case 'n':
 585                         ignore_null_sized_partition = true;
 586                         break;
 587                 case 'g':
 588                         use_guid_partition_table = 1;
 589                         break;
 590                 case 'H':
 591                         hybrid = 1;
 592                         break;
 593                 case 'h':
 594                         heads = (int)strtoul(optarg, NULL, 0);
 595                         break;
 596                 case 's':
 597                         sectors = (int)strtoul(optarg, NULL, 0);
 598                         break;
 599                 case 'p':
 600                         if (part > GPT_ENTRY_MAX - 1 || (!use_guid_partition_table && part > 3)) {
 601                                 fputs("Too many partitions\n", stderr);
 602                                 exit(EXIT_FAILURE);
 603                         }
 604                         p = strchr(optarg, '@');
 605                         if (p) {
 606                                 *(p++) = 0;
 607                                 parts[part].start = to_kbytes(p);
 608                         }
 609                         part_guid = type_to_guid_and_name(type, &name);
 610                         parts[part].size = to_kbytes(optarg);
 611                         parts[part].required = required;
 612                         parts[part].name = name;
 613                         parts[part].hybrid = hybrid;
 614                         parts[part].guid = part_guid;
 615                         fprintf(stderr, "part %ld %ld\n", parts[part].start, parts[part].size);
 616                         parts[part++].type = type;
 617                         /*
 618                          * reset 'name','required' and 'hybrid'
 619                          * 'type' is deliberately inherited from the previous delcaration
 620                          */
 621                         name = NULL;
 622                         required = 0;
 623                         hybrid = 0;
 624                         break;
 625                 case 'N':
 626                         name = optarg;
 627                         break;
 628                 case 'r':
 629                         required = 1;
 630                         break;
 631                 case 't':
 632                         type = (char)strtoul(optarg, NULL, 16);
 633                         break;
 634                 case 'a':
 635                         active = (int)strtoul(optarg, NULL, 0);
 636                         if ((active < 0) || (active > 4))
 637                                 active = 0;
 638                         break;
 639                 case 'l':
 640                         kb_align = (int)strtoul(optarg, NULL, 0) * 2;
 641                         break;
 642                 case 'S':
 643                         signature = strtoul(optarg, NULL, 0);
 644                         break;
 645                 case 'G':
 646                         if (guid_parse(optarg, &guid)) {
 647                                 fputs("Invalid guid string\n", stderr);
 648                                 exit(EXIT_FAILURE);
 649                         }
 650                         break;
 651                 case '?':
 652                 default:
 653                         usage(argv[0]);
 654                 }
 655         }
 656         argc -= optind;
 657         if (argc || (!use_guid_partition_table && ((heads <= 0) || (sectors <= 0))) || !filename)
 658                 usage(argv[0]);
 659
 660         if (use_guid_partition_table) {
 661                 heads = 254;
 662                 sectors = 63;
 663                 return gen_gptable(signature, guid, part) ? EXIT_FAILURE : EXIT_SUCCESS;
 664         }
 665
 666         return gen_ptable(signature, part) ? EXIT_FAILURE : EXIT_SUCCESS;
 667 }