1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <libgen.h> 29 #include <malloc.h> 30 #include <string.h> 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <fcntl.h> 34 #include <unistd.h> 35 #include <strings.h> 36 #include <sys/mount.h> 37 #include <sys/mnttab.h> 38 #include <sys/dktp/fdisk.h> 39 #include <sys/dkio.h> 40 #include <sys/vtoc.h> 41 42 #include <libintl.h> 43 #include <locale.h> 44 #include "message.h" 45 #include <errno.h> 46 #include <libfdisk.h> 47 #include <md5.h> 48 49 #ifndef TEXT_DOMAIN 50 #define TEXT_DOMAIN "SUNW_OST_OSCMD" 51 #endif 52 53 #define SECTOR_SIZE 0x200 54 #define HASH_SIZE 0x10 55 #define VERSION_SIZE 0x50 56 #define STAGE2_MEMADDR 0x8000 /* loading addr of stage2 */ 57 58 #define STAGE1_BPB_OFFSET 0x3 59 #define STAGE1_BPB_SIZE 0x3B 60 #define STAGE1_BOOT_DRIVE 0x40 61 #define STAGE1_FORCE_LBA 0x41 62 #define STAGE1_STAGE2_ADDRESS 0x42 63 #define STAGE1_STAGE2_SECTOR 0x44 64 #define STAGE1_STAGE2_SEGMENT 0x48 65 66 #define STAGE2_BLOCKLIST (SECTOR_SIZE - 0x8) 67 #define STAGE2_INSTALLPART (SECTOR_SIZE + 0x8) 68 #define STAGE2_FORCE_LBA (SECTOR_SIZE + 0x11) 69 #define STAGE2_VER_STRING (SECTOR_SIZE + 0x12) 70 #define STAGE2_SIGN_OFFSET (SECTOR_SIZE + 0x60) 71 #define STAGE2_PKG_VERSION (SECTOR_SIZE + 0x70) 72 #define STAGE2_BLKOFF 50 /* offset from start of fdisk part */ 73 74 static char extended_sig[] = "\xCC\xCC\xCC\xCC\xAA\xAA\xAA\xAA\xBB\xBB\xBB\xBB" 75 "\xBB\xBB\xBB\xBB"; 76 77 static int nowrite = 0; 78 static int write_mboot = 0; 79 static int force_mboot = 0; 80 static int getinfo = 0; 81 static int do_version = 0; 82 static int is_floppy = 0; 83 static int is_bootpar = 0; 84 static int strip = 0; 85 static int stage2_fd; 86 static int partition, slice = 0xff; 87 static char *device_p0; 88 static uint32_t stage2_first_sector, stage2_second_sector; 89 90 91 static char bpb_sect[SECTOR_SIZE]; 92 static char boot_sect[SECTOR_SIZE]; 93 static char stage1_buffer[SECTOR_SIZE]; 94 static char stage2_buffer[2 * SECTOR_SIZE]; 95 static char signature[HASH_SIZE]; 96 static char verstring[VERSION_SIZE]; 97 static unsigned int blocklist[SECTOR_SIZE / sizeof (unsigned int)]; 98 99 static int open_device(char *); 100 static void read_bpb_sect(int); 101 static void read_boot_sect(char *); 102 static void write_boot_sect(char *); 103 static void read_stage1_stage2(char *, char *); 104 static void modify_and_write_stage1(int); 105 static void modify_and_write_stage2(int); 106 static unsigned int get_start_sector(int); 107 static void copy_stage2(int, char *); 108 static char *get_raw_partition(char *); 109 static void usage(char *); 110 static void print_info(); 111 static int read_stage2_info(int); 112 static void check_extended_support(); 113 114 extern int read_stage2_blocklist(int, unsigned int *); 115 116 int 117 main(int argc, char *argv[]) 118 { 119 int dev_fd, opt, params = 3; 120 char *stage1, *stage2, *device; 121 122 (void) setlocale(LC_ALL, ""); 123 (void) textdomain(TEXT_DOMAIN); 124 125 while ((opt = getopt(argc, argv, "fmneis:")) != EOF) { 126 switch (opt) { 127 case 'm': 128 write_mboot = 1; 129 break; 130 case 'n': 131 nowrite = 1; 132 break; 133 case 'f': 134 force_mboot = 1; 135 break; 136 case 'i': 137 getinfo = 1; 138 params = 1; 139 break; 140 case 'e': 141 strip = 1; 142 break; 143 case 's': 144 do_version = 1; 145 (void) snprintf(verstring, sizeof (verstring), "%s", 146 optarg); 147 break; 148 default: 149 /* fall through to process non-optional args */ 150 break; 151 } 152 } 153 154 /* check arguments */ 155 if (argc != optind + params) { 156 usage(argv[0]); 157 } 158 159 if (nowrite) { 160 (void) fprintf(stdout, DRY_RUN); 161 } 162 163 if (params == 1) { 164 device = strdup(argv[optind]); 165 if (!device) { 166 usage(argv[0]); 167 } 168 } else if (params == 3) { 169 stage1 = strdup(argv[optind]); 170 stage2 = strdup(argv[optind + 1]); 171 device = strdup(argv[optind + 2]); 172 173 if (!stage1 || !stage2 || !device) { 174 usage(argv[0]); 175 } 176 } 177 178 /* open and check device type */ 179 dev_fd = open_device(device); 180 181 if (getinfo) { 182 if (read_stage2_info(dev_fd) != 0) { 183 fprintf(stderr, "Unable to read extended information" 184 " from %s\n", device); 185 exit(1); 186 } 187 print_info(); 188 (void) free(device); 189 (void) close(dev_fd); 190 return (0); 191 } 192 193 /* read in stage1 and stage2 into buffer */ 194 read_stage1_stage2(stage1, stage2); 195 196 /* check if stage2 supports extended versioning */ 197 if (do_version) 198 check_extended_support(stage2); 199 200 /* In the pcfs case, write a fresh stage2 */ 201 if (is_floppy || is_bootpar) { 202 copy_stage2(dev_fd, device); 203 read_bpb_sect(dev_fd); 204 } 205 206 /* read in boot sector */ 207 if (!is_floppy) 208 read_boot_sect(device); 209 210 /* modify stage1 based on grub needs */ 211 modify_and_write_stage1(dev_fd); 212 213 /* modify stage2 and write to media */ 214 modify_and_write_stage2(dev_fd); 215 216 if (!is_floppy && write_mboot) 217 write_boot_sect(device); 218 219 (void) close(dev_fd); 220 free(device); 221 free(stage1); 222 free(stage2); 223 224 return (0); 225 } 226 227 static unsigned int 228 get_start_sector(int fd) 229 { 230 static unsigned int start_sect = 0; 231 uint32_t secnum, numsec; 232 int i, pno, rval, ext_sol_part_found = 0; 233 struct mboot *mboot; 234 struct ipart *part; 235 ext_part_t *epp; 236 237 if (start_sect) 238 return (start_sect); 239 240 mboot = (struct mboot *)boot_sect; 241 for (i = 0; i < FD_NUMPART; i++) { 242 part = (struct ipart *)mboot->parts + i; 243 if (is_bootpar) { 244 if (part->systid == 0xbe) 245 break; 246 } 247 } 248 249 /* Read extended partition to find a solaris partition */ 250 if ((rval = libfdisk_init(&epp, device_p0, NULL, FDISK_READ_DISK)) 251 != FDISK_SUCCESS) { 252 switch (rval) { 253 /* 254 * FDISK_EBADLOGDRIVE and FDISK_ENOLOGDRIVE can 255 * be considered as soft errors and hence 256 * we do not exit 257 */ 258 case FDISK_EBADLOGDRIVE: 259 break; 260 case FDISK_ENOLOGDRIVE: 261 break; 262 case FDISK_ENOVGEOM: 263 (void) fprintf(stderr, NO_VIRT_GEOM); 264 exit(1); 265 break; 266 case FDISK_ENOPGEOM: 267 (void) fprintf(stderr, NO_PHYS_GEOM); 268 exit(1); 269 break; 270 case FDISK_ENOLGEOM: 271 (void) fprintf(stderr, NO_LABEL_GEOM); 272 exit(1); 273 break; 274 default: 275 (void) fprintf(stderr, LIBFDISK_INIT_FAIL); 276 exit(1); 277 break; 278 } 279 } 280 281 rval = fdisk_get_solaris_part(epp, &pno, &secnum, &numsec); 282 if (rval == FDISK_SUCCESS) { 283 ext_sol_part_found = 1; 284 } 285 libfdisk_fini(&epp); 286 287 /* 288 * If there is no boot partition, find the solaris partition 289 */ 290 291 if (i == FD_NUMPART) { 292 struct part_info dkpi; 293 struct extpart_info edkpi; 294 295 /* 296 * Get the solaris partition information from the device 297 * and compare the offset of S2 with offset of solaris partition 298 * from fdisk partition table. 299 */ 300 if (ioctl(fd, DKIOCEXTPARTINFO, &edkpi) < 0) { 301 if (ioctl(fd, DKIOCPARTINFO, &dkpi) < 0) { 302 (void) fprintf(stderr, PART_FAIL); 303 exit(-1); 304 } else { 305 edkpi.p_start = dkpi.p_start; 306 } 307 } 308 309 for (i = 0; i < FD_NUMPART; i++) { 310 part = (struct ipart *)mboot->parts + i; 311 312 if (part->relsect == 0) { 313 (void) fprintf(stderr, BAD_PART, i); 314 exit(-1); 315 } 316 317 if (edkpi.p_start >= part->relsect && 318 edkpi.p_start < (part->relsect + part->numsect)) { 319 /* Found the partition */ 320 break; 321 } 322 } 323 } 324 325 if ((i == FD_NUMPART) && (!ext_sol_part_found)) { 326 (void) fprintf(stderr, BOOTPAR); 327 exit(-1); 328 } 329 330 /* get confirmation for -m */ 331 if (write_mboot && !force_mboot) { 332 (void) fprintf(stdout, MBOOT_PROMPT); 333 if (getchar() != 'y') { 334 write_mboot = 0; 335 (void) fprintf(stdout, MBOOT_NOT_UPDATED); 336 } 337 } 338 339 if (fdisk_is_dos_extended(part->systid)) { 340 start_sect = secnum; 341 partition = pno; 342 } else { 343 start_sect = part->relsect; 344 partition = i; 345 } 346 347 if (part->bootid != 128 && write_mboot == 0) { 348 (void) fprintf(stdout, BOOTPAR_INACTIVE, i + 1); 349 } 350 351 return (start_sect); 352 } 353 354 static void 355 usage(char *progname) 356 { 357 (void) fprintf(stderr, USAGE, basename(progname)); 358 exit(-1); 359 } 360 361 static int 362 open_device(char *device) 363 { 364 int dev_fd; 365 struct stat stat; 366 char *raw_part; 367 368 is_floppy = strncmp(device, "/dev/rdsk", strlen("/dev/rdsk")) && 369 strncmp(device, "/dev/dsk", strlen("/dev/dsk")); 370 371 /* handle boot partition specification */ 372 if (!is_floppy && strstr(device, "p0:boot")) { 373 is_bootpar = 1; 374 } 375 376 raw_part = get_raw_partition(device); 377 378 if (nowrite) 379 dev_fd = open(raw_part, O_RDONLY); 380 else 381 dev_fd = open(raw_part, O_RDWR); 382 383 if (dev_fd == -1 || fstat(dev_fd, &stat) != 0) { 384 (void) fprintf(stderr, OPEN_FAIL, raw_part); 385 exit(-1); 386 } 387 if (S_ISCHR(stat.st_mode) == 0) { 388 (void) fprintf(stderr, NOT_RAW_DEVICE, raw_part); 389 exit(-1); 390 } 391 392 return (dev_fd); 393 } 394 395 static void 396 read_stage1_stage2(char *stage1, char *stage2) 397 { 398 int fd; 399 400 /* read the stage1 file from filesystem */ 401 fd = open(stage1, O_RDONLY); 402 if (fd == -1 || read(fd, stage1_buffer, SECTOR_SIZE) != SECTOR_SIZE) { 403 (void) fprintf(stderr, READ_FAIL_STAGE1, stage1); 404 exit(-1); 405 } 406 (void) close(fd); 407 408 /* read first two blocks of stage 2 from filesystem */ 409 stage2_fd = open(stage2, O_RDONLY); 410 if (stage2_fd == -1 || 411 read(stage2_fd, stage2_buffer, 2 * SECTOR_SIZE) 412 != 2 * SECTOR_SIZE) { 413 (void) fprintf(stderr, READ_FAIL_STAGE2, stage2); 414 exit(-1); 415 } 416 /* leave the stage2 file open for later */ 417 } 418 419 static void 420 read_bpb_sect(int dev_fd) 421 { 422 if (pread(dev_fd, bpb_sect, SECTOR_SIZE, 0) != SECTOR_SIZE) { 423 (void) fprintf(stderr, READ_FAIL_BPB); 424 exit(-1); 425 } 426 } 427 428 static void 429 read_boot_sect(char *device) 430 { 431 static int read_mbr = 0; 432 int i, fd; 433 char save[2]; 434 435 if (read_mbr) 436 return; 437 read_mbr = 1; 438 439 /* get the whole disk (p0) */ 440 i = strlen(device); 441 save[0] = device[i - 2]; 442 save[1] = device[i - 1]; 443 device[i - 2] = 'p'; 444 device[i - 1] = '0'; 445 446 device_p0 = strdup(device); 447 fd = open(device, O_RDONLY); 448 if (fd == -1 || read(fd, boot_sect, SECTOR_SIZE) != SECTOR_SIZE) { 449 (void) fprintf(stderr, READ_FAIL_MBR, device); 450 if (fd == -1) 451 perror("open"); 452 else 453 perror("read"); 454 exit(-1); 455 } 456 (void) close(fd); 457 device[i - 2] = save[0]; 458 device[i - 1] = save[1]; 459 } 460 461 static void 462 write_boot_sect(char *device) 463 { 464 int fd, len; 465 char *raw, *end; 466 struct stat stat; 467 468 /* make a copy and chop off ":boot" */ 469 raw = strdup(device); 470 end = strstr(raw, "p0:boot"); 471 if (end) 472 end[2] = 0; 473 474 /* open p0 (whole disk) */ 475 len = strlen(raw); 476 raw[len - 2] = 'p'; 477 raw[len - 1] = '0'; 478 fd = open(raw, O_WRONLY); 479 if (fd == -1 || fstat(fd, &stat) != 0) { 480 (void) fprintf(stderr, OPEN_FAIL, raw); 481 exit(-1); 482 } 483 if (!nowrite && 484 pwrite(fd, stage1_buffer, SECTOR_SIZE, 0) != SECTOR_SIZE) { 485 (void) fprintf(stderr, WRITE_FAIL_BOOTSEC); 486 exit(-1); 487 } 488 (void) fprintf(stdout, WRITE_MBOOT); 489 (void) close(fd); 490 } 491 492 static void 493 modify_and_write_stage1(int dev_fd) 494 { 495 if (is_floppy) { 496 stage2_first_sector = blocklist[0]; 497 /* copy bios parameter block (for fat fs) */ 498 bcopy(bpb_sect + STAGE1_BPB_OFFSET, 499 stage1_buffer + STAGE1_BPB_OFFSET, STAGE1_BPB_SIZE); 500 } else if (is_bootpar) { 501 stage2_first_sector = get_start_sector(dev_fd) + blocklist[0]; 502 /* copy bios parameter block (for fat fs) and MBR */ 503 bcopy(bpb_sect + STAGE1_BPB_OFFSET, 504 stage1_buffer + STAGE1_BPB_OFFSET, STAGE1_BPB_SIZE); 505 bcopy(boot_sect + BOOTSZ, stage1_buffer + BOOTSZ, 512 - BOOTSZ); 506 *((unsigned char *)(stage1_buffer + STAGE1_FORCE_LBA)) = 1; 507 } else { 508 stage2_first_sector = get_start_sector(dev_fd) + STAGE2_BLKOFF; 509 /* copy MBR to stage1 in case of overwriting MBR sector */ 510 bcopy(boot_sect + BOOTSZ, stage1_buffer + BOOTSZ, 512 - BOOTSZ); 511 *((unsigned char *)(stage1_buffer + STAGE1_FORCE_LBA)) = 1; 512 } 513 514 /* modify default stage1 file generated by GRUB */ 515 *((ulong_t *)(stage1_buffer + STAGE1_STAGE2_SECTOR)) 516 = stage2_first_sector; 517 *((ushort_t *)(stage1_buffer + STAGE1_STAGE2_ADDRESS)) 518 = STAGE2_MEMADDR; 519 *((ushort_t *)(stage1_buffer + STAGE1_STAGE2_SEGMENT)) 520 = STAGE2_MEMADDR >> 4; 521 522 /* 523 * XXX the default grub distribution also: 524 * - Copy the possible MBR/extended part table 525 * - Set the boot drive of stage1 526 */ 527 528 /* write stage1/pboot to 1st sector */ 529 if (!nowrite && 530 pwrite(dev_fd, stage1_buffer, SECTOR_SIZE, 0) != SECTOR_SIZE) { 531 (void) fprintf(stderr, WRITE_FAIL_PBOOT); 532 exit(-1); 533 } 534 535 if (is_floppy) { 536 (void) fprintf(stdout, WRITE_BOOTSEC_FLOPPY); 537 } else { 538 (void) fprintf(stdout, WRITE_PBOOT, 539 partition, get_start_sector(dev_fd)); 540 } 541 } 542 543 static void check_extended_support(char *stage2) 544 { 545 char *cmp = stage2_buffer + STAGE2_SIGN_OFFSET - 1; 546 547 if ((*cmp++ != '\xEE') && memcmp(cmp, extended_sig, HASH_SIZE) != 0) { 548 fprintf(stderr, "%s does not support extended versioning\n", 549 stage2); 550 do_version = 0; 551 } 552 } 553 554 555 static void print_info() 556 { 557 int i; 558 559 if (strip) { 560 fprintf(stdout, "%s\n", verstring); 561 } else { 562 fprintf(stdout, "Grub extended version information : %s\n", 563 verstring); 564 fprintf(stdout, "Grub stage2 (MD5) signature : "); 565 } 566 567 for (i = 0; i < HASH_SIZE; i++) 568 fprintf(stdout, "%02x", (unsigned char)signature[i]); 569 570 fprintf(stdout, "\n"); 571 } 572 573 static int 574 read_stage2_info(int dev_fd) 575 { 576 int ret; 577 int first_offset, second_offset; 578 char *sign; 579 580 if (is_floppy || is_bootpar) { 581 582 ret = pread(dev_fd, stage1_buffer, SECTOR_SIZE, 0); 583 if (ret != SECTOR_SIZE) { 584 perror("Error reading stage1 sector"); 585 return (1); 586 } 587 588 first_offset = *((ulong_t *)(stage1_buffer + 589 STAGE1_STAGE2_SECTOR)); 590 591 /* Start reading in the first sector of stage 2 */ 592 593 ret = pread(dev_fd, stage2_buffer, SECTOR_SIZE, first_offset * 594 SECTOR_SIZE); 595 if (ret != SECTOR_SIZE) { 596 perror("Error reading stage2 first sector"); 597 return (1); 598 } 599 600 /* From the block list section grab stage2 second sector */ 601 602 second_offset = *((ulong_t *)(stage2_buffer + 603 STAGE2_BLOCKLIST)); 604 605 ret = pread(dev_fd, stage2_buffer + SECTOR_SIZE, SECTOR_SIZE, 606 second_offset * SECTOR_SIZE); 607 if (ret != SECTOR_SIZE) { 608 perror("Error reading stage2 second sector"); 609 return (1); 610 } 611 } else { 612 ret = pread(dev_fd, stage2_buffer, 2 * SECTOR_SIZE, 613 STAGE2_BLKOFF * SECTOR_SIZE); 614 if (ret != 2 * SECTOR_SIZE) { 615 perror("Error reading stage2 sectors"); 616 return (1); 617 } 618 } 619 620 sign = stage2_buffer + STAGE2_SIGN_OFFSET - 1; 621 if (*sign++ != '\xEE') 622 return (1); 623 (void) memcpy(signature, sign, HASH_SIZE); 624 sign = stage2_buffer + STAGE2_PKG_VERSION; 625 (void) strncpy(verstring, sign, VERSION_SIZE); 626 return (0); 627 } 628 629 630 static int 631 compute_and_write_md5hash(char *dest) 632 { 633 struct stat sb; 634 char *buffer; 635 636 if (fstat(stage2_fd, &sb) == -1) 637 return (-1); 638 639 buffer = malloc(sb.st_size); 640 if (buffer == NULL) 641 return (-1); 642 643 if (lseek(stage2_fd, 0, SEEK_SET) == -1) 644 return (-1); 645 if (read(stage2_fd, buffer, sb.st_size) < 0) 646 return (-1); 647 648 md5_calc(dest, buffer, sb.st_size); 649 free(buffer); 650 return (0); 651 } 652 653 654 #define START_BLOCK(pos) (*(ulong_t *)(pos)) 655 #define NUM_BLOCK(pos) (*(ushort_t *)((pos) + 4)) 656 #define START_SEG(pos) (*(ushort_t *)((pos) + 6)) 657 658 static void 659 modify_and_write_stage2(int dev_fd) 660 { 661 int nrecord; 662 off_t offset; 663 char *dest; 664 665 if (do_version) { 666 dest = stage2_buffer + STAGE2_SIGN_OFFSET; 667 if (compute_and_write_md5hash(dest) < 0) 668 perror("MD5 operation"); 669 dest = stage2_buffer + STAGE2_PKG_VERSION; 670 (void) strncpy(dest, verstring, VERSION_SIZE); 671 } 672 673 if (is_floppy || is_bootpar) { 674 int i = 0; 675 uint32_t partition_offset; 676 uint32_t install_addr = 0x8200; 677 uchar_t *pos = (uchar_t *)stage2_buffer + STAGE2_BLOCKLIST; 678 679 stage2_first_sector = blocklist[0]; 680 681 /* figure out the second sector */ 682 if (blocklist[1] > 1) { 683 blocklist[0]++; 684 blocklist[1]--; 685 } else { 686 i += 2; 687 } 688 stage2_second_sector = blocklist[i]; 689 690 if (is_floppy) 691 partition_offset = 0; 692 else /* solaris boot partition */ 693 partition_offset = get_start_sector(dev_fd); 694 695 /* install the blocklist at the end of stage2_buffer */ 696 while (blocklist[i]) { 697 if (START_BLOCK(pos - 8) != 0 && 698 START_BLOCK(pos - 8) != blocklist[i + 2]) { 699 (void) fprintf(stderr, PCFS_FRAGMENTED); 700 exit(-1); 701 } 702 START_BLOCK(pos) = blocklist[i] + partition_offset; 703 START_SEG(pos) = (ushort_t)(install_addr >> 4); 704 NUM_BLOCK(pos) = blocklist[i + 1]; 705 install_addr += blocklist[i + 1] * SECTOR_SIZE; 706 pos -= 8; 707 i += 2; 708 } 709 710 } else { 711 /* 712 * In a solaris partition, stage2 is written to contiguous 713 * blocks. So we update the starting block only. 714 */ 715 *((ulong_t *)(stage2_buffer + STAGE2_BLOCKLIST)) = 716 stage2_first_sector + 1; 717 } 718 719 if (is_floppy) { 720 /* modify the config file to add (fd0) */ 721 char *config_file = stage2_buffer + STAGE2_VER_STRING; 722 while (*config_file++) 723 ; 724 strcpy(config_file, "(fd0)/boot/grub/menu.lst"); 725 } else { 726 /* force lba and set disk partition */ 727 *((unsigned char *) (stage2_buffer + STAGE2_FORCE_LBA)) = 1; 728 *((long *)(stage2_buffer + STAGE2_INSTALLPART)) 729 = (partition << 16) | (slice << 8) | 0xff; 730 } 731 732 /* modification done, now do the writing */ 733 if (is_floppy || is_bootpar) { 734 /* we rewrite block 0 and 1 and that's it */ 735 if (!nowrite && 736 (pwrite(dev_fd, stage2_buffer, SECTOR_SIZE, 737 stage2_first_sector * SECTOR_SIZE) != SECTOR_SIZE || 738 pwrite(dev_fd, stage2_buffer + SECTOR_SIZE, SECTOR_SIZE, 739 stage2_second_sector * SECTOR_SIZE) != SECTOR_SIZE)) { 740 (void) fprintf(stderr, WRITE_FAIL_STAGE2); 741 exit(-1); 742 } 743 (void) fprintf(stdout, WRITE_STAGE2_PCFS); 744 return; 745 } 746 747 /* for disk, write stage2 starting at STAGE2_BLKOFF sector */ 748 offset = STAGE2_BLKOFF; 749 750 /* write the modified first two sectors */ 751 if (!nowrite && pwrite(dev_fd, stage2_buffer, 2 * SECTOR_SIZE, 752 offset * SECTOR_SIZE) != 2 * SECTOR_SIZE) { 753 (void) fprintf(stderr, WRITE_FAIL_STAGE2); 754 exit(-1); 755 } 756 757 /* write the remaining sectors */ 758 nrecord = 2; 759 offset += 2; 760 for (;;) { 761 int nread, nwrite; 762 nread = pread(stage2_fd, stage2_buffer, SECTOR_SIZE, 763 nrecord * SECTOR_SIZE); 764 if (nread > 0 && !nowrite) 765 nwrite = pwrite(dev_fd, stage2_buffer, SECTOR_SIZE, 766 offset * SECTOR_SIZE); 767 else 768 nwrite = SECTOR_SIZE; 769 if (nread < 0 || nwrite != SECTOR_SIZE) { 770 (void) fprintf(stderr, WRITE_FAIL_STAGE2_BLOCKS, 771 nread, nwrite); 772 break; 773 } 774 if (nread > 0) { 775 nrecord ++; 776 offset ++; 777 } 778 if (nread < SECTOR_SIZE) 779 break; /* end of file */ 780 } 781 (void) fprintf(stdout, WRITE_STAGE2_DISK, 782 partition, nrecord, STAGE2_BLKOFF, stage2_first_sector); 783 } 784 785 static char * 786 get_raw_partition(char *device) 787 { 788 int len; 789 struct mboot *mboot; 790 static char *raw = NULL; 791 792 if (raw) 793 return (raw); 794 raw = strdup(device); 795 796 if (is_floppy) 797 return (raw); 798 799 if (is_bootpar) { 800 int i; 801 char *end = strstr(raw, "p0:boot"); 802 803 end[2] = 0; /* chop off :boot */ 804 read_boot_sect(raw); 805 mboot = (struct mboot *)boot_sect; 806 for (i = 0; i < FD_NUMPART; i++) { 807 struct ipart *part = (struct ipart *)mboot->parts + i; 808 if (part->systid == 0xbe) /* solaris boot part */ 809 break; 810 } 811 812 if (i == FD_NUMPART) { 813 (void) fprintf(stderr, BOOTPAR_NOTFOUND, device); 814 exit(-1); 815 } 816 end[1] = '1' + i; /* set partition name */ 817 return (raw); 818 } 819 820 /* For disk, remember slice and return whole fdisk partition */ 821 len = strlen(raw); 822 if (raw[len - 2] != 's' || raw[len - 1] == '2') { 823 (void) fprintf(stderr, NOT_ROOT_SLICE); 824 exit(-1); 825 } 826 slice = atoi(&raw[len - 1]); 827 828 raw[len - 2] = 's'; 829 raw[len - 1] = '2'; 830 return (raw); 831 } 832 833 #define TMP_MNTPT "/tmp/installgrub_pcfs" 834 static void 835 copy_stage2(int dev_fd, char *device) 836 { 837 FILE *mntfp; 838 int i, pcfs_fp; 839 char buf[SECTOR_SIZE]; 840 char *cp; 841 struct mnttab mp = {0}, mpref = {0}; 842 843 /* convert raw to block device name by removing the first 'r' */ 844 (void) strncpy(buf, device, sizeof (buf)); 845 buf[sizeof (buf) - 1] = 0; 846 cp = strchr(buf, 'r'); 847 if (cp == NULL) { 848 (void) fprintf(stderr, CONVERT_FAIL, device); 849 exit(-1); 850 } 851 do { 852 *cp = *(cp + 1); 853 } while (*(++cp)); 854 855 /* get the mount point, if any */ 856 mntfp = fopen("/etc/mnttab", "r"); 857 if (mntfp == NULL) { 858 (void) fprintf(stderr, OPEN_FAIL_FILE, "/etc/mnttab"); 859 exit(-1); 860 } 861 862 mpref.mnt_special = buf; 863 if (getmntany(mntfp, &mp, &mpref) != 0) { 864 char cmd[128]; 865 866 /* not mounted, try remount */ 867 (void) mkdir(TMP_MNTPT, S_IRWXU); 868 (void) snprintf(cmd, sizeof (cmd), "mount -F pcfs %s %s", 869 buf, TMP_MNTPT); 870 (void) system(cmd); 871 rewind(mntfp); 872 bzero(&mp, sizeof (mp)); 873 if (getmntany(mntfp, &mp, &mpref) != 0) { 874 (void) fprintf(stderr, MOUNT_FAIL, buf); 875 exit(-1); 876 } 877 } 878 879 (void) snprintf(buf, sizeof (buf), 880 "%s/boot", mp.mnt_mountp); 881 (void) mkdir(buf, S_IRWXU); 882 (void) strcat(buf, "/grub"); 883 (void) mkdir(buf, S_IRWXU); 884 885 (void) strcat(buf, "/stage2"); 886 pcfs_fp = open(buf, O_WRONLY | O_CREAT, S_IRWXU); 887 if (pcfs_fp == -1) { 888 (void) fprintf(stderr, OPEN_FAIL_FILE, buf); 889 perror("open:"); 890 (void) umount(TMP_MNTPT); 891 exit(-1); 892 } 893 894 /* write stage2 to pcfs */ 895 for (i = 0; ; i++) { 896 int nread, nwrite; 897 nread = pread(stage2_fd, buf, SECTOR_SIZE, i * SECTOR_SIZE); 898 if (nowrite) 899 nwrite = nread; 900 else 901 nwrite = pwrite(pcfs_fp, buf, nread, i * SECTOR_SIZE); 902 if (nread < 0 || nwrite != nread) { 903 (void) fprintf(stderr, WRITE_FAIL_STAGE2_BLOCKS, 904 nread, nwrite); 905 break; 906 } 907 if (nread < SECTOR_SIZE) 908 break; /* end of file */ 909 } 910 (void) close(pcfs_fp); 911 (void) umount(TMP_MNTPT); 912 913 /* 914 * Now, get the blocklist from the device. 915 */ 916 bzero(blocklist, sizeof (blocklist)); 917 if (read_stage2_blocklist(dev_fd, blocklist) != 0) 918 exit(-1); 919 } 920