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
  98 #define GPT_ATTR_PLAT_REQUIRED  BIT(0)
  99 #define GPT_ATTR_EFI_IGNORE     BIT(1)
 100 #define GPT_ATTR_LEGACY_BOOT    BIT(2)
 101
 102 #define GPT_HEADER_SECTOR       1
 103 #define GPT_FIRST_ENTRY_SECTOR  2
 104
 105 #define MBR_ENTRY_MAX           4
 106 #define MBR_DISK_SIGNATURE_OFFSET  440
 107 #define MBR_PARTITION_ENTRY_OFFSET 446
 108 #define MBR_BOOT_SIGNATURE_OFFSET  510
 109
 110 #define DISK_SECTOR_SIZE        512
 111
 112 /* Partition table entry */
 113 struct pte {
 114         uint8_t active;
 115         uint8_t chs_start[3];
 116         uint8_t type;
 117         uint8_t chs_end[3];
 118         uint32_t start;
 119         uint32_t length;
 120 };
 121
 122 struct partinfo {
 123         unsigned long start;
 124         unsigned long size;
 125         int type;
 126         char *name;
 127         short int required;
 128         guid_t guid;
 129 };
 130
 131 /* GPT Partition table header */
 132 struct gpth {
 133         uint64_t signature;
 134         uint32_t revision;
 135         uint32_t size;
 136         uint32_t crc32;
 137         uint32_t reserved;
 138         uint64_t self;
 139         uint64_t alternate;
 140         uint64_t first_usable;
 141         uint64_t last_usable;
 142         guid_t disk_guid;
 143         uint64_t first_entry;
 144         uint32_t entry_num;
 145         uint32_t entry_size;
 146         uint32_t entry_crc32;
 147 } __attribute__((packed));
 148
 149 /* GPT Partition table entry */
 150 struct gpte {
 151         guid_t type;
 152         guid_t guid;
 153         uint64_t start;
 154         uint64_t end;
 155         uint64_t attr;
 156         char name[GPT_ENTRY_NAME_SIZE];
 157 } __attribute__((packed));
 158
 159
 160 int verbose = 0;
 161 int active = 1;
 162 int heads = -1;
 163 int sectors = -1;
 164 int kb_align = 0;
 165 bool ignore_null_sized_partition = false;
 166 bool use_guid_partition_table = false;
 167 struct partinfo parts[GPT_ENTRY_MAX];
 168 char *filename = NULL;
 169
 170
 171 /*
 172  * parse the size argument, which is either
 173  * a simple number (K assumed) or
 174  * K, M or G
 175  *
 176  * returns the size in KByte
 177  */
 178 static long to_kbytes(const char *string)
 179 {
 180         int exp = 0;
 181         long result;
 182         char *end;
 183
 184         result = strtoul(string, &end, 0);
 185         switch (tolower(*end)) {
 186                 case 'k' :
 187                 case '\0' : exp = 0; break;
 188                 case 'm' : exp = 1; break;
 189                 case 'g' : exp = 2; break;
 190                 default: return 0;
 191         }
 192
 193         if (*end)
 194                 end++;
 195
 196         if (*end) {
 197                 fputs("garbage after end of number\n", stderr);
 198                 return 0;
 199         }
 200
 201         /* result: number + 1024^(exp) */
 202         if (exp == 0)
 203                 return result;
 204         return result * (2 << ((10 * exp) - 1));
 205 }
 206
 207 /* convert the sector number into a CHS value for the partition table */
 208 static void to_chs(long sect, unsigned char chs[3])
 209 {
 210         int c,h,s;
 211
 212         s = (sect % sectors) + 1;
 213         sect = sect / sectors;
 214         h = sect % heads;
 215         sect = sect / heads;
 216         c = sect;
 217
 218         chs[0] = h;
 219         chs[1] = s | ((c >> 2) & 0xC0);
 220         chs[2] = c & 0xFF;
 221
 222         return;
 223 }
 224
 225 /* round the sector number up to the next cylinder */
 226 static inline unsigned long round_to_cyl(long sect)
 227 {
 228         int cyl_size = heads * sectors;
 229
 230         return sect + cyl_size - (sect % cyl_size);
 231 }
 232
 233 /* round the sector number up to the kb_align boundary */
 234 static inline unsigned long round_to_kb(long sect) {
 235         return ((sect - 1) / kb_align + 1) * kb_align;
 236 }
 237
 238 /* Compute a CRC for guid partition table */
 239 static inline unsigned long gpt_crc32(void *buf, unsigned long len)
 240 {
 241         return cyg_crc32_accumulate(~0L, buf, len) ^ ~0L;
 242 }
 243
 244 /* Parse a guid string to guid_t struct */
 245 static inline int guid_parse(char *buf, guid_t *guid)
 246 {
 247         char b[4] = {0};
 248         char *p = buf;
 249         unsigned i = 0;
 250         if (strnlen(buf, GUID_STRING_LENGTH) != GUID_STRING_LENGTH)
 251                 return -1;
 252         for (i = 0; i < sizeof(guid_t); i++) {
 253                 if (*p == '-')
 254                         p++;
 255                 if (*p == '\0')
 256                         return -1;
 257                 memcpy(b, p, 2);
 258                 guid->b[i] = strtol(b, 0, 16);
 259                 p += 2;
 260         }
 261         swap(guid->b[0], guid->b[3]);
 262         swap(guid->b[1], guid->b[2]);
 263         swap(guid->b[4], guid->b[5]);
 264         swap(guid->b[6], guid->b[7]);
 265         return 0;
 266 }
 267
 268 /* init an utf-16 string from utf-8 string */
 269 static inline void init_utf16(char *str, uint16_t *buf, unsigned bufsize)
 270 {
 271         unsigned i, n = 0;
 272         for (i = 0; i < bufsize; i++) {
 273                 if (str[n] == 0x00) {
 274                         buf[i] = 0x00;
 275                         return ;
 276                 } else if ((str[n] & 0x80) == 0x00) {//0xxxxxxx
 277                         buf[i] = cpu_to_le16(str[n++]);
 278                 } else if ((str[n] & 0xE0) == 0xC0) {//110xxxxx
 279                         buf[i] = cpu_to_le16((str[n] & 0x1F) << 6 | (str[n + 1] & 0x3F));
 280                         n += 2;
 281                 } else if ((str[n] & 0xF0) == 0xE0) {//1110xxxx
 282                         buf[i] = cpu_to_le16((str[n] & 0x0F) << 12 | (str[n + 1] & 0x3F) << 6 | (str[n + 2] & 0x3F));
 283                         n += 3;
 284                 } else {
 285                         buf[i] = cpu_to_le16('?');
 286                         n++;
 287                 }
 288         }
 289 }
 290
 291 /* check the partition sizes and write the partition table */
 292 static int gen_ptable(uint32_t signature, int nr)
 293 {
 294         struct pte pte[MBR_ENTRY_MAX];
 295         unsigned long start, len, sect = 0;
 296         int i, fd, ret = -1;
 297
 298         memset(pte, 0, sizeof(struct pte) * MBR_ENTRY_MAX);
 299         for (i = 0; i < nr; i++) {
 300                 if (!parts[i].size) {
 301                         if (ignore_null_sized_partition)
 302                                 continue;
 303                         fprintf(stderr, "Invalid size in partition %d!\n", i);
 304                         return ret;
 305                 }
 306
 307                 pte[i].active = ((i + 1) == active) ? 0x80 : 0;
 308                 pte[i].type = parts[i].type;
 309
 310                 start = sect + sectors;
 311                 if (parts[i].start != 0) {
 312                         if (parts[i].start * 2 < start) {
 313                                 fprintf(stderr, "Invalid start %ld for partition %d!\n",
 314                                         parts[i].start, i, start);
 315                                 return ret;
 316                         }
 317                         start = parts[i].start * 2;
 318                 } else if (kb_align != 0) {
 319                         start = round_to_kb(start);
 320                 }
 321                 pte[i].start = cpu_to_le32(start);
 322
 323                 sect = start + parts[i].size * 2;
 324                 if (kb_align == 0)
 325                         sect = round_to_cyl(sect);
 326                 pte[i].length = cpu_to_le32(len = sect - start);
 327
 328                 to_chs(start, pte[i].chs_start);
 329                 to_chs(start + len - 1, pte[i].chs_end);
 330
 331                 if (verbose)
 332                         fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n",
 333                                         i,
 334                                         (long)start * DISK_SECTOR_SIZE,
 335                                         (long)(start + len) * DISK_SECTOR_SIZE,
 336                                         (long)len * DISK_SECTOR_SIZE);
 337                 printf("%ld\n", (long)start * DISK_SECTOR_SIZE);
 338                 printf("%ld\n", (long)len * DISK_SECTOR_SIZE);
 339         }
 340
 341         if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
 342                 fprintf(stderr, "Can't open output file '%s'\n",filename);
 343                 return ret;
 344         }
 345
 346         lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
 347         if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
 348                 fputs("write failed.\n", stderr);
 349                 goto fail;
 350         }
 351
 352         lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
 353         if (write(fd, pte, sizeof(struct pte) * MBR_ENTRY_MAX) != sizeof(struct pte) * MBR_ENTRY_MAX) {
 354                 fputs("write failed.\n", stderr);
 355                 goto fail;
 356         }
 357         lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
 358         if (write(fd, "\x55\xaa", 2) != 2) {
 359                 fputs("write failed.\n", stderr);
 360                 goto fail;
 361         }
 362
 363         ret = 0;
 364 fail:
 365         close(fd);
 366         return ret;
 367 }
 368
 369 /* check the partition sizes and write the guid partition table */
 370 static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
 371 {
 372         struct pte pte;
 373         struct gpth gpth = {
 374                 .signature = cpu_to_le64(GPT_SIGNATURE),
 375                 .revision = cpu_to_le32(GPT_REVISION),
 376                 .size = cpu_to_le32(GPT_HEADER_SIZE),
 377                 .self = cpu_to_le64(GPT_HEADER_SECTOR),
 378                 .first_usable = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
 379                 .first_entry = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR),
 380                 .disk_guid = guid,
 381                 .entry_num = cpu_to_le32(GPT_ENTRY_MAX),
 382                 .entry_size = cpu_to_le32(GPT_ENTRY_SIZE),
 383         };
 384         struct gpte  gpte[GPT_ENTRY_MAX];
 385         uint64_t start, end, sect = 0;
 386         int fd, ret = -1;
 387         unsigned i;
 388
 389         memset(gpte, 0, GPT_ENTRY_SIZE * GPT_ENTRY_MAX);
 390         for (i = 0; i < nr; i++) {
 391                 if (!parts[i].size) {
 392                         if (ignore_null_sized_partition)
 393                                 continue;
 394                         fprintf(stderr, "Invalid size in partition %d!\n", i);
 395                         return ret;
 396                 }
 397                 start = sect + sectors;
 398                 if (parts[i].start != 0) {
 399                         if (parts[i].start * 2 < start) {
 400                                 fprintf(stderr, "Invalid start %ld for partition %d!\n",
 401                                         parts[i].start, i, start);
 402                                 return ret;
 403                         }
 404                         start = parts[i].start * 2;
 405                 } else if (kb_align != 0) {
 406                         start = round_to_kb(start);
 407                 }
 408                 gpte[i].start = cpu_to_le64(start);
 409
 410                 sect = start + parts[i].size * 2;
 411                 if (kb_align == 0)
 412                         sect = round_to_cyl(sect);
 413                 gpte[i].end = cpu_to_le64(sect -1);
 414                 gpte[i].guid = guid;
 415                 gpte[i].guid.b[sizeof(guid_t) -1] += i + 1;
 416                 gpte[i].type = parts[i].guid;
 417
 418                 if (parts[i].name)
 419                         init_utf16(parts[i].name, (uint16_t *)gpte[i].name, GPT_ENTRY_NAME_SIZE / sizeof(uint16_t));
 420
 421                 if ((i + 1) == (unsigned)active)
 422                         gpte[i].attr |= GPT_ATTR_LEGACY_BOOT;
 423
 424                 if (parts[i].required)
 425                         gpte[i].attr |= GPT_ATTR_PLAT_REQUIRED;
 426
 427                 if (verbose)
 428                         fprintf(stderr, "Partition %d: start=%" PRIu64 ", end=%" PRIu64 ", size=%"  PRIu64 "\n",
 429                                         i,
 430                                         start * DISK_SECTOR_SIZE, sect * DISK_SECTOR_SIZE,
 431                                         (sect - start) * DISK_SECTOR_SIZE);
 432                 printf("%" PRIu64 "\n", start * DISK_SECTOR_SIZE);
 433                 printf("%" PRIu64 "\n", (sect - start) * DISK_SECTOR_SIZE);
 434         }
 435
 436         gpte[GPT_ENTRY_MAX - 1].start = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE);
 437         gpte[GPT_ENTRY_MAX - 1].end = cpu_to_le64((kb_align ? round_to_kb(sectors) : (unsigned long)sectors) - 1);
 438         gpte[GPT_ENTRY_MAX - 1].type = GUID_PARTITION_BIOS_BOOT;
 439         gpte[GPT_ENTRY_MAX - 1].guid = guid;
 440         gpte[GPT_ENTRY_MAX - 1].guid.b[sizeof(guid_t) -1] += GPT_ENTRY_MAX;
 441
 442         end = sect + sectors - 1;
 443
 444         pte.type = 0xEE;
 445         pte.start = cpu_to_le32(GPT_HEADER_SECTOR);
 446         pte.length = cpu_to_le32(end);
 447         to_chs(GPT_HEADER_SECTOR, pte.chs_start);
 448         to_chs(end, pte.chs_end);
 449
 450         gpth.last_usable = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE - 1);
 451         gpth.alternate = cpu_to_le64(end);
 452         gpth.entry_crc32 = cpu_to_le32(gpt_crc32(gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX));
 453         gpth.crc32 = cpu_to_le32(gpt_crc32((char *)&gpth, GPT_HEADER_SIZE));
 454
 455         if ((fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0) {
 456                 fprintf(stderr, "Can't open output file '%s'\n",filename);
 457                 return ret;
 458         }
 459
 460         lseek(fd, MBR_DISK_SIGNATURE_OFFSET, SEEK_SET);
 461         if (write(fd, &signature, sizeof(signature)) != sizeof(signature)) {
 462                 fputs("write failed.\n", stderr);
 463                 goto fail;
 464         }
 465
 466         lseek(fd, MBR_PARTITION_ENTRY_OFFSET, SEEK_SET);
 467         if (write(fd, &pte, sizeof(struct pte)) != sizeof(struct pte)) {
 468                 fputs("write failed.\n", stderr);
 469                 goto fail;
 470         }
 471
 472         lseek(fd, MBR_BOOT_SIGNATURE_OFFSET, SEEK_SET);
 473         if (write(fd, "\x55\xaa", 2) != 2) {
 474                 fputs("write failed.\n", stderr);
 475                 goto fail;
 476         }
 477
 478         if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
 479                 fputs("write failed.\n", stderr);
 480                 goto fail;
 481         }
 482
 483         lseek(fd, GPT_FIRST_ENTRY_SECTOR * DISK_SECTOR_SIZE, SEEK_SET);
 484         if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
 485                 fputs("write failed.\n", stderr);
 486                 goto fail;
 487         }
 488
 489 #ifdef WANT_ALTERNATE_PTABLE
 490         /* The alternate partition table (We omit it by default) */
 491         swap(gpth.self, gpth.alternate);
 492         gpth.first_entry = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE),
 493         gpth.crc32 = 0;
 494         gpth.crc32 = cpu_to_le32(gpt_crc32(&gpth, GPT_HEADER_SIZE));
 495
 496         lseek(fd, end * DISK_SECTOR_SIZE - GPT_ENTRY_SIZE * GPT_ENTRY_MAX, SEEK_SET);
 497         if (write(fd, &gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX) != GPT_ENTRY_SIZE * GPT_ENTRY_MAX) {
 498                 fputs("write failed.\n", stderr);
 499                 goto fail;
 500         }
 501
 502         lseek(fd, end * DISK_SECTOR_SIZE, SEEK_SET);
 503         if (write(fd, &gpth, GPT_HEADER_SIZE) != GPT_HEADER_SIZE) {
 504                 fputs("write failed.\n", stderr);
 505                 goto fail;
 506         }
 507         lseek(fd, (end + 1) * DISK_SECTOR_SIZE -1, SEEK_SET);
 508         if (write(fd, "\x00", 1) != 1) {
 509                 fputs("write failed.\n", stderr);
 510                 goto fail;
 511         }
 512 #endif
 513
 514         ret = 0;
 515 fail:
 516         close(fd);
 517         return ret;
 518 }
 519
 520 static void usage(char *prog)
 521 {
 522         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);
 523         exit(EXIT_FAILURE);
 524 }
 525
 526 static guid_t type_to_guid_and_name(unsigned char type, char **name)
 527 {
 528         guid_t guid = GUID_PARTITION_BASIC_DATA;
 529
 530         switch (type) {
 531                 case 0xef:
 532                         *name = "EFI System Partition";
 533                         guid = GUID_PARTITION_SYSTEM;
 534                         break;
 535                 case 0x83:
 536                         guid = GUID_PARTITION_LINUX_FS_GUID;
 537                         break;
 538                 case 0x2e:
 539                         guid = GUID_PARTITION_LINUX_FIT_GUID;
 540                         break;
 541         }
 542
 543         return guid;
 544 }
 545
 546 int main (int argc, char **argv)
 547 {
 548         unsigned char type = 0x83;
 549         char *p;
 550         int ch;
 551         int part = 0;
 552         char *name = NULL;
 553         unsigned short int required = 0;
 554         uint32_t signature = 0x5452574F; /* 'OWRT' */
 555         guid_t guid = GUID_INIT( signature, 0x2211, 0x4433, \
 556                         0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0x00);
 557         guid_t part_guid = GUID_PARTITION_BASIC_DATA;
 558
 559         while ((ch = getopt(argc, argv, "h:s:p:a:t:o:vnN:gl:rS:G:")) != -1) {
 560                 switch (ch) {
 561                 case 'o':
 562                         filename = optarg;
 563                         break;
 564                 case 'v':
 565                         verbose++;
 566                         break;
 567                 case 'n':
 568                         ignore_null_sized_partition = true;
 569                         break;
 570                 case 'g':
 571                         use_guid_partition_table = 1;
 572                         break;
 573                 case 'h':
 574                         heads = (int)strtoul(optarg, NULL, 0);
 575                         break;
 576                 case 's':
 577                         sectors = (int)strtoul(optarg, NULL, 0);
 578                         break;
 579                 case 'p':
 580                         if (part > GPT_ENTRY_MAX - 1 || (!use_guid_partition_table && part > 3)) {
 581                                 fputs("Too many partitions\n", stderr);
 582                                 exit(EXIT_FAILURE);
 583                         }
 584                         p = strchr(optarg, '@');
 585                         if (p) {
 586                                 *(p++) = 0;
 587                                 parts[part].start = to_kbytes(p);
 588                         }
 589                         parts[part].size = to_kbytes(optarg);
 590                         parts[part].required = required;
 591                         parts[part].name = name;
 592                         parts[part].guid = part_guid;
 593                         fprintf(stderr, "part %ld %ld\n", parts[part].start, parts[part].size);
 594                         parts[part++].type = type;
 595                         /*
 596                          * reset 'name' and 'required'
 597                          * 'type' is deliberately inherited from the previous delcaration
 598                          */
 599                         name = NULL;
 600                         required = 0;
 601                         part_guid = type_to_guid_and_name(type, &name);
 602                         break;
 603                 case 'N':
 604                         name = optarg;
 605                         break;
 606                 case 'r':
 607                         required = 1;
 608                         break;
 609                 case 't':
 610                         type = (char)strtoul(optarg, NULL, 16);
 611                         part_guid = type_to_guid_and_name(type, &name);
 612                         break;
 613                 case 'a':
 614                         active = (int)strtoul(optarg, NULL, 0);
 615                         if ((active < 0) || (active > 4))
 616                                 active = 0;
 617                         break;
 618                 case 'l':
 619                         kb_align = (int)strtoul(optarg, NULL, 0) * 2;
 620                         break;
 621                 case 'S':
 622                         signature = strtoul(optarg, NULL, 0);
 623                         break;
 624                 case 'G':
 625                         if (guid_parse(optarg, &guid)) {
 626                                 fputs("Invalid guid string\n", stderr);
 627                                 exit(EXIT_FAILURE);
 628                         }
 629                         break;
 630                 case '?':
 631                 default:
 632                         usage(argv[0]);
 633                 }
 634         }
 635         argc -= optind;
 636         if (argc || (heads <= 0) || (sectors <= 0) || !filename)
 637                 usage(argv[0]);
 638
 639         if (use_guid_partition_table)
 640                 return gen_gptable(signature, guid, part) ? EXIT_FAILURE : EXIT_SUCCESS;
 641
 642         return gen_ptable(signature, part) ? EXIT_FAILURE : EXIT_SUCCESS;
 643 }