sbin/gpt/gpt.c

   1 /*-
   2  * Copyright (c) 2002 Marcel Moolenaar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * CRC32 code derived from work by Gary S. Brown.
  27  *
  28  * $FreeBSD: src/sbin/gpt/gpt.c,v 1.16 2006/07/07 02:44:23 marcel Exp $
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <sys/diskslice.h>
  35
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <fcntl.h>
  39 #include <paths.h>
  40 #include <stddef.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45
  46 #include "map.h"
  47 #include "gpt.h"
  48
  49 char    *device_name;
  50
  51 off_t   mediasz;
  52
  53 u_int   parts;
  54 u_int   secsz;
  55
  56 int     readonly, verbose;
  57
  58 static uint32_t crc32_tab[] = {
  59         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
  60         0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  61         0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
  62         0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  63         0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  64         0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  65         0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
  66         0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  67         0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
  68         0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  69         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
  70         0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  71         0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
  72         0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  73         0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  74         0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  75         0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
  76         0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  77         0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
  78         0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  79         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
  80         0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  81         0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
  82         0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  83         0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  84         0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  85         0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
  86         0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  87         0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
  88         0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  89         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
  90         0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  91         0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
  92         0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  93         0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  94         0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  95         0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
  96         0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  97         0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
  98         0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  99         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
 100         0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
 101         0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
 102 };
 103
 104 uint32_t
 105 crc32(const void *buf, size_t size)
 106 {
 107         const uint8_t *p;
 108         uint32_t crc;
 109
 110         p = buf;
 111         crc = ~0U;
 112
 113         while (size--)
 114                 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
 115
 116         return crc ^ ~0U;
 117 }
 118
 119 uint8_t *
 120 utf16_to_utf8(uint16_t *s16)
 121 {
 122         static uint8_t *s8 = NULL;
 123         static size_t s8len = 0;
 124         size_t s8idx, s16idx, s16len;
 125         uint32_t utfchar;
 126         unsigned int c;
 127
 128         s16len = 0;
 129         while (s16[s16len++] != 0)
 130                 ;
 131         if (s8len < s16len * 3) {
 132                 if (s8 != NULL)
 133                         free(s8);
 134                 s8len = s16len * 3;
 135                 s8 = calloc(s16len, 3);
 136         }
 137         s8idx = s16idx = 0;
 138         while (s16idx < s16len) {
 139                 utfchar = le16toh(s16[s16idx++]);
 140                 if ((utfchar & 0xf800) == 0xd800) {
 141                         c = le16toh(s16[s16idx]);
 142                         if ((utfchar & 0x400) != 0 || (c & 0xfc00) != 0xdc00)
 143                                 utfchar = 0xfffd;
 144                         else
 145                                 s16idx++;
 146                 }
 147                 if (utfchar < 0x80) {
 148                         s8[s8idx++] = utfchar;
 149                 } else if (utfchar < 0x800) {
 150                         s8[s8idx++] = 0xc0 | (utfchar >> 6);
 151                         s8[s8idx++] = 0x80 | (utfchar & 0x3f);
 152                 } else if (utfchar < 0x10000) {
 153                         s8[s8idx++] = 0xe0 | (utfchar >> 12);
 154                         s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
 155                         s8[s8idx++] = 0x80 | (utfchar & 0x3f);
 156                 } else if (utfchar < 0x200000) {
 157                         s8[s8idx++] = 0xf0 | (utfchar >> 18);
 158                         s8[s8idx++] = 0x80 | ((utfchar >> 12) & 0x3f);
 159                         s8[s8idx++] = 0x80 | ((utfchar >> 6) & 0x3f);
 160                         s8[s8idx++] = 0x80 | (utfchar & 0x3f);
 161                 }
 162         }
 163         return (s8);
 164 }
 165
 166 void
 167 utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
 168 {
 169         size_t s16idx, s8idx, s8len;
 170         uint32_t utfchar;
 171         unsigned int c, utfbytes;
 172
 173         s8len = 0;
 174         while (s8[s8len++] != 0)
 175                 ;
 176         s8idx = s16idx = 0;
 177         utfbytes = 0;
 178         do {
 179                 utfchar = 0;
 180                 c = s8[s8idx++];
 181                 if ((c & 0xc0) != 0x80) {
 182                         /* Initial characters. */
 183                         if (utfbytes != 0) {
 184                                 /* Incomplete encoding. */
 185                                 s16[s16idx++] = 0xfffd;
 186                                 if (s16idx == s16len) {
 187                                         s16[--s16idx] = 0;
 188                                         return;
 189                                 }
 190                         }
 191                         if ((c & 0xf8) == 0xf0) {
 192                                 utfchar = c & 0x07;
 193                                 utfbytes = 3;
 194                         } else if ((c & 0xf0) == 0xe0) {
 195                                 utfchar = c & 0x0f;
 196                                 utfbytes = 2;
 197                         } else if ((c & 0xe0) == 0xc0) {
 198                                 utfchar = c & 0x1f;
 199                                 utfbytes = 1;
 200                         } else {
 201                                 utfchar = c & 0x7f;
 202                                 utfbytes = 0;
 203                         }
 204                 } else {
 205                         /* Followup characters. */
 206                         if (utfbytes > 0) {
 207                                 utfchar = (utfchar << 6) + (c & 0x3f);
 208                                 utfbytes--;
 209                         } else if (utfbytes == 0)
 210                                 utfbytes = -1;
 211                 }
 212                 if (utfbytes == 0) {
 213                         if (utfchar >= 0x10000 && s16idx + 2 >= s16len)
 214                                 utfchar = 0xfffd;
 215                         if (utfchar >= 0x10000) {
 216                                 s16[s16idx++] = 0xd800 | ((utfchar>>10)-0x40);
 217                                 s16[s16idx++] = 0xdc00 | (utfchar & 0x3ff);
 218                         } else
 219                                 s16[s16idx++] = utfchar;
 220                         if (s16idx == s16len) {
 221                                 s16[--s16idx] = 0;
 222                                 return;
 223                         }
 224                 }
 225         } while (c != 0);
 226 }
 227
 228 void
 229 le_uuid_dec(void const *buf, uuid_t *uuid)
 230 {
 231         u_char const *p;
 232         int i;
 233
 234         p = buf;
 235         uuid->time_low = le32dec(p);
 236         uuid->time_mid = le16dec(p + 4);
 237         uuid->time_hi_and_version = le16dec(p + 6);
 238         uuid->clock_seq_hi_and_reserved = p[8];
 239         uuid->clock_seq_low = p[9];
 240         for (i = 0; i < _UUID_NODE_LEN; i++)
 241                 uuid->node[i] = p[10 + i];
 242 }
 243
 244 void
 245 le_uuid_enc(void *buf, uuid_t const *uuid)
 246 {
 247         u_char *p;
 248         int i;
 249
 250         p = buf;
 251         le32enc(p, uuid->time_low);
 252         le16enc(p + 4, uuid->time_mid);
 253         le16enc(p + 6, uuid->time_hi_and_version);
 254         p[8] = uuid->clock_seq_hi_and_reserved;
 255         p[9] = uuid->clock_seq_low;
 256         for (i = 0; i < _UUID_NODE_LEN; i++)
 257                 p[10 + i] = uuid->node[i];
 258 }
 259
 260 int
 261 parse_uuid(const char *s, uuid_t *uuid)
 262 {
 263         uint32_t status;
 264         uuid_t tmp;
 265
 266         uuid_from_string(s, uuid, &status);
 267         if (status == uuid_s_ok)
 268                 return (0);
 269
 270         switch (*s) {
 271         case 'd':
 272                 if (strcmp(s, "dfly") == 0 || strcmp(s, "dragonfly") == 0) {
 273                         s = "DragonFly Label64";
 274                         /* fall through to lookup at end */
 275                 }
 276                 break;
 277         case 'e':
 278                 if (strcmp(s, "efi") == 0) {
 279                         uuid_t efi = GPT_ENT_TYPE_EFI;
 280                         *uuid = efi;
 281                         return (0);
 282                 }
 283                 break;
 284         case 'h':
 285                 if (strcmp(s, "hammer2") == 0) {
 286                         uuid_t hammer2 = GPT_ENT_TYPE_DRAGONFLY_HAMMER2;
 287                         *uuid = hammer2;
 288                         return (0);
 289                 }
 290                 if (strcmp(s, "hammer") == 0) {
 291                         uuid_t hammer = GPT_ENT_TYPE_DRAGONFLY_HAMMER;
 292                         *uuid = hammer;
 293                         return (0);
 294                 }
 295                 if (strcmp(s, "hfs") == 0) {
 296                         uuid_t hfs = GPT_ENT_TYPE_APPLE_HFS;
 297                         *uuid = hfs;
 298                         return (0);
 299                 }
 300                 break;
 301         case 'l':
 302                 if (strcmp(s, "linux") == 0) {
 303                         uuid_t lnx = GPT_ENT_TYPE_MS_BASIC_DATA;
 304                         *uuid = lnx;
 305                         return (0);
 306                 }
 307                 break;
 308         case 's':
 309                 if (strcmp(s, "swap") == 0) {
 310                         uuid_t sw = GPT_ENT_TYPE_FREEBSD_SWAP;
 311                         *uuid = sw;
 312                         return (0);
 313                 }
 314                 break;
 315         case 'u':
 316                 if (strcmp(s, "ufs") == 0) {
 317                         uuid_t ufs = GPT_ENT_TYPE_FREEBSD_UFS;
 318                         *uuid = ufs;
 319                         return (0);
 320                 }
 321                 break;
 322         case 'w':
 323                 if (strcmp(s, "windows") == 0) {
 324                         uuid_t win = GPT_ENT_TYPE_MS_BASIC_DATA;
 325                         *uuid = win;
 326                         return (0);
 327                 }
 328                 break;
 329         }
 330
 331         uuid_name_lookup(&tmp, s, &status);
 332         if (status == uuid_s_ok) {
 333                 *uuid = tmp;
 334                 return(0);
 335         }
 336
 337         return (EINVAL);
 338 }
 339
 340 void*
 341 gpt_read(int fd, off_t lba, size_t count)
 342 {
 343         off_t ofs;
 344         void *buf;
 345
 346         count *= secsz;
 347         buf = malloc(count);
 348         if (buf == NULL)
 349                 return (NULL);
 350
 351         ofs = lba * secsz;
 352         if (lseek(fd, ofs, SEEK_SET) == ofs &&
 353             read(fd, buf, count) == (ssize_t)count)
 354                 return (buf);
 355
 356         free(buf);
 357         return (NULL);
 358 }
 359
 360 int
 361 gpt_write(int fd, map_t *map)
 362 {
 363         off_t ofs;
 364         size_t count;
 365
 366         count = map->map_size * secsz;
 367         ofs = map->map_start * secsz;
 368         if (lseek(fd, ofs, SEEK_SET) == ofs &&
 369             write(fd, map->map_data, count) == (ssize_t)count)
 370                 return (0);
 371         return (-1);
 372 }
 373
 374 static int
 375 gpt_mbr(int fd, off_t lba)
 376 {
 377         struct mbr *mbr;
 378         map_t *m, *p;
 379         off_t size, start;
 380         unsigned int i, pmbr;
 381
 382         mbr = gpt_read(fd, lba, 1);
 383         if (mbr == NULL)
 384                 return (-1);
 385
 386         if (mbr->mbr_sig != htole16(MBR_SIG)) {
 387                 if (verbose)
 388                         warnx("%s: MBR not found at sector %llu", device_name,
 389                             (long long)lba);
 390                 free(mbr);
 391                 return (0);
 392         }
 393
 394         /*
 395          * Differentiate between a regular MBR and a PMBR. This is more
 396          * convenient in general. A PMBR is one with a single partition
 397          * of type 0xee.
 398          */
 399         pmbr = 0;
 400         for (i = 0; i < 4; i++) {
 401                 if (mbr->mbr_part[i].part_typ == 0)
 402                         continue;
 403                 if (mbr->mbr_part[i].part_typ == 0xee)
 404                         pmbr++;
 405                 else
 406                         break;
 407         }
 408         if (pmbr && (i == 1 || i == 4) && lba == 0) {
 409                 if (pmbr != 1)
 410                         warnx("%s: Suspicious PMBR at sector %llu",
 411                             device_name, (long long)lba);
 412                 else if (verbose > 1)
 413                         warnx("%s: PMBR at sector %llu", device_name,
 414                             (long long)lba);
 415                 p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr);
 416                 return ((p == NULL) ? -1 : 0);
 417         }
 418         if (pmbr)
 419                 warnx("%s: Suspicious MBR at sector %llu", device_name,
 420                     (long long)lba);
 421         else if (verbose > 1)
 422                 warnx("%s: MBR at sector %llu", device_name, (long long)lba);
 423
 424         p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr);
 425         if (p == NULL)
 426                 return (-1);
 427         for (i = 0; i < 4; i++) {
 428                 if (mbr->mbr_part[i].part_typ == 0 ||
 429                     mbr->mbr_part[i].part_typ == 0xee)
 430                         continue;
 431                 start = le16toh(mbr->mbr_part[i].part_start_hi);
 432                 start = (start << 16) + le16toh(mbr->mbr_part[i].part_start_lo);
 433                 size = le16toh(mbr->mbr_part[i].part_size_hi);
 434                 size = (size << 16) + le16toh(mbr->mbr_part[i].part_size_lo);
 435                 if (start == 0 && size == 0) {
 436                         warnx("%s: Malformed MBR at sector %llu", device_name,
 437                             (long long)lba);
 438                         continue;
 439                 }
 440                 /* start is relative to the offset of the MBR itself. */
 441                 start += lba;
 442                 if (verbose > 2)
 443                         warnx("%s: MBR part: type=%d, start=%llu, size=%llu",
 444                             device_name, mbr->mbr_part[i].part_typ,
 445                             (long long)start, (long long)size);
 446                 if (mbr->mbr_part[i].part_typ != 15) {
 447                         m = map_add(start, size, MAP_TYPE_MBR_PART, p);
 448                         if (m == NULL)
 449                                 return (-1);
 450                         m->map_index = i;
 451                 } else {
 452                         if (gpt_mbr(fd, start) == -1)
 453                                 return (-1);
 454                 }
 455         }
 456         return (0);
 457 }
 458
 459 static int
 460 gpt_gpt(int fd, off_t lba)
 461 {
 462         uuid_t type;
 463         off_t size;
 464         struct gpt_ent *ent;
 465         struct gpt_hdr *hdr;
 466         char *p, *s;
 467         map_t *m;
 468         size_t blocks, tblsz;
 469         unsigned int i;
 470         uint32_t crc;
 471
 472         hdr = gpt_read(fd, lba, 1);
 473         if (hdr == NULL)
 474                 return (-1);
 475
 476         if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)))
 477                 goto fail_hdr;
 478
 479         crc = le32toh(hdr->hdr_crc_self);
 480         hdr->hdr_crc_self = 0;
 481         if (crc32(hdr, le32toh(hdr->hdr_size)) != crc) {
 482                 if (verbose)
 483                         warnx("%s: Bad CRC in GPT header at sector %llu",
 484                             device_name, (long long)lba);
 485                 goto fail_hdr;
 486         }
 487
 488         tblsz = le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz);
 489         blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0);
 490
 491         /* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */
 492         p = gpt_read(fd, le64toh(hdr->hdr_lba_table), blocks);
 493         if (p == NULL)
 494                 return (-1);
 495
 496         if (crc32(p, tblsz) != le32toh(hdr->hdr_crc_table)) {
 497                 if (verbose)
 498                         warnx("%s: Bad CRC in GPT table at sector %llu",
 499                             device_name,
 500                             (long long)le64toh(hdr->hdr_lba_table));
 501                 goto fail_ent;
 502         }
 503
 504         if (verbose > 1)
 505                 warnx("%s: %s GPT at sector %llu", device_name,
 506                     (lba == 1) ? "Pri" : "Sec", (long long)lba);
 507
 508         m = map_add(lba, 1, (lba == 1)
 509             ? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr);
 510         if (m == NULL)
 511                 return (-1);
 512
 513         m = map_add(le64toh(hdr->hdr_lba_table), blocks, (lba == 1)
 514             ? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p);
 515         if (m == NULL)
 516                 return (-1);
 517
 518         if (lba != 1)
 519                 return (0);
 520
 521         for (i = 0; i < le32toh(hdr->hdr_entries); i++) {
 522                 ent = (void*)(p + i * le32toh(hdr->hdr_entsz));
 523                 if (uuid_is_nil(&ent->ent_type, NULL))
 524                         continue;
 525
 526                 size = le64toh(ent->ent_lba_end) - le64toh(ent->ent_lba_start) +
 527                     1LL;
 528                 if (verbose > 2) {
 529                         le_uuid_dec(&ent->ent_type, &type);
 530                         uuid_to_string(&type, &s, NULL);
 531                         warnx(
 532         "%s: GPT partition: type=%s, start=%llu, size=%llu", device_name, s,
 533                             (long long)le64toh(ent->ent_lba_start),
 534                             (long long)size);
 535                         free(s);
 536                 }
 537                 m = map_add(le64toh(ent->ent_lba_start), size,
 538                     MAP_TYPE_GPT_PART, ent);
 539                 if (m == NULL)
 540                         return (-1);
 541                 m->map_index = i;
 542         }
 543         return (0);
 544
 545  fail_ent:
 546         free(p);
 547
 548  fail_hdr:
 549         free(hdr);
 550         return (0);
 551 }
 552
 553 int
 554 gpt_open(const char *dev)
 555 {
 556         struct stat sb;
 557         char device_path[MAXPATHLEN];
 558         int fd, mode;
 559
 560         mode = readonly ? O_RDONLY : O_RDWR|O_EXCL;
 561
 562         strlcpy(device_path, dev, sizeof(device_path));
 563         device_name = device_path;
 564
 565         if ((fd = open(device_path, mode)) != -1)
 566                 goto found;
 567
 568         snprintf(device_path, sizeof(device_path), "%s%s", _PATH_DEV, dev);
 569         device_name = device_path + strlen(_PATH_DEV);
 570         if ((fd = open(device_path, mode)) != -1)
 571                 goto found;
 572
 573         return (-1);
 574
 575  found:
 576         if (fstat(fd, &sb) == -1)
 577                 goto close;
 578
 579         if ((sb.st_mode & S_IFMT) != S_IFREG) {
 580                 struct partinfo partinfo;
 581
 582                 if (ioctl(fd, DIOCGPART, &partinfo) < 0)
 583                         goto close;
 584                 secsz = partinfo.media_blksize;
 585                 mediasz = partinfo.media_size;
 586         } else {
 587                 secsz = 512;    /* Fixed size for files. */
 588                 if (sb.st_size % secsz) {
 589                         errno = EINVAL;
 590                         goto close;
 591                 }
 592                 mediasz = sb.st_size;
 593         }
 594
 595         /*
 596          * We require an absolute minimum of 6 sectors. One for the MBR,
 597          * 2 for the GPT header, 2 for the GPT table and one to hold some
 598          * user data. Let's catch this extreme border case here so that
 599          * we don't have to worry about it later.
 600          */
 601         if (mediasz / secsz < 6) {
 602                 errno = ENODEV;
 603                 goto close;
 604         }
 605
 606         if (verbose)
 607                 warnx("%s: mediasize=%llu; sectorsize=%u; blocks=%llu",
 608                     device_name, (long long)mediasz, secsz,
 609                     (long long)(mediasz / secsz));
 610
 611         map_init(mediasz / secsz);
 612
 613         if (gpt_mbr(fd, 0LL) == -1)
 614                 goto close;
 615         if (gpt_gpt(fd, 1LL) == -1)
 616                 goto close;
 617         if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
 618                 goto close;
 619
 620         return (fd);
 621
 622  close:
 623         close(fd);
 624         return (-1);
 625 }
 626
 627 void
 628 gpt_close(int fd)
 629 {
 630         /* XXX post processing? */
 631         close(fd);
 632 }
 633
 634 #ifndef _LIBEFIVAR
 635 static struct {
 636         int (*fptr)(int, char *[]);
 637         const char *name;
 638 } cmdsw[] = {
 639         { cmd_add, "add" },
 640         { cmd_boot, "boot" },
 641         { cmd_create, "create" },
 642         { cmd_destroy, "destroy" },
 643         { cmd_expand, "expand" },
 644         { NULL, "help" },
 645         { cmd_init, "init" },
 646         { cmd_label, "label" },
 647         { cmd_migrate, "migrate" },
 648         { cmd_recover, "recover" },
 649         { cmd_remove, "remove" },
 650         { NULL, "rename" },
 651         { cmd_show, "show" },
 652         { NULL, "verify" },
 653         { NULL, NULL }
 654 };
 655
 656 static void
 657 usage(void)
 658 {
 659         const char *prgname = getprogname();
 660
 661         fprintf(stderr,
 662             "usage: %s [-rv] [-p nparts] <command> [options] <device> ...\n"
 663             "       %s show <device>\n",
 664             prgname, prgname);
 665         exit(1);
 666 }
 667
 668 static void
 669 prefix(const char *cmd)
 670 {
 671         char *pfx;
 672         const char *prg;
 673
 674         prg = getprogname();
 675         pfx = malloc(strlen(prg) + strlen(cmd) + 2);
 676         /* Don't bother failing. It's not important */
 677         if (pfx == NULL)
 678                 return;
 679
 680         sprintf(pfx, "%s %s", prg, cmd);
 681         setprogname(pfx);
 682 }
 683
 684 int
 685 main(int argc, char *argv[])
 686 {
 687         char *cmd, *p;
 688         int ch, i;
 689
 690         /* Get the generic options */
 691         while ((ch = getopt(argc, argv, "p:rv")) != -1) {
 692                 switch(ch) {
 693                 case 'p':
 694                         if (parts > 0)
 695                                 usage();
 696                         parts = strtol(optarg, &p, 10);
 697                         if (*p != 0 || parts < 1)
 698                                 usage();
 699                         break;
 700                 case 'r':
 701                         readonly = 1;
 702                         break;
 703                 case 'v':
 704                         verbose++;
 705                         break;
 706                 default:
 707                         usage();
 708                 }
 709         }
 710         if (!parts)
 711                 parts = 128;
 712
 713         if (argc == optind)
 714                 usage();
 715
 716         cmd = argv[optind++];
 717         for (i = 0; cmdsw[i].name != NULL && strcmp(cmd, cmdsw[i].name); i++);
 718
 719         if (cmdsw[i].fptr == NULL)
 720                 errx(1, "unknown command: %s", cmd);
 721
 722         prefix(cmd);
 723         return ((*cmdsw[i].fptr)(argc, argv));
 724 }
 725 #endif /* !_LIBEFIVAR */