1/* 2 * Mach Operating System 3 * Copyright (c) 1992 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 */ 26 27#include <sys/cdefs.h> 28#include <sys/disk.h> 29#include <sys/disklabel.h> 30#include <sys/diskmbr.h> 31#include <sys/endian.h> 32#include <sys/param.h> 33#include <sys/stat.h> 34#include <sys/mount.h> 35#include <ctype.h> 36#include <fcntl.h> 37#include <err.h> 38#include <errno.h> 39#include <libgeom.h> 40#include <paths.h> 41#include <regex.h> 42#include <stdint.h> 43#include <stdio.h> 44#include <stdlib.h> 45#include <string.h> 46#include <unistd.h> 47 48#include "fdisk_mbr_enc.h" 49 50static int iotest; 51 52#define NO_DISK_SECTORS ((u_int32_t)-1) 53#define NO_TRACK_CYLINDERS 1023 54#define NO_TRACK_HEADS 255 55#define NO_TRACK_SECTORS 63 56#define LBUF 100 57static char lbuf[LBUF]; 58 59/* 60 * 61 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 62 * 63 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University 64 * Copyright (c) 1989 Robert. V. Baron 65 * Created. 66 */ 67 68#define Decimal(str, ans, tmp, maxval) if (decimal(str, &tmp, ans, maxval)) ans = tmp 69 70#define MAX_SEC_SIZE 65536 /* maximum sector size that is supported */ 71#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ 72static int secsize = 0; /* the sensed sector size */ 73 74static char *disk; 75 76static int cyls, sectors, heads, cylsecs; 77static u_int32_t disksecs; 78 79struct mboot { 80 unsigned char *bootinst; /* boot code */ 81 off_t bootinst_size; 82 struct dos_partition parts[NDOSPART]; 83}; 84 85static struct mboot mboot; 86static int fd; 87 88#define ACTIVE 0x80 89 90static uint dos_cyls; 91static uint dos_heads; 92static uint dos_sectors; 93static uint dos_cylsecs; 94 95#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) 96#define DOSCYL(c) (c & 0xff) 97 98#define MAX_ARGS 10 99 100static int current_line_number; 101 102static int geom_processed = 0; 103static int part_processed = 0; 104static int active_processed = 0; 105 106typedef struct cmd { 107 char cmd; 108 int n_args; 109 struct arg { 110 char argtype; 111 unsigned long arg_val; 112 char * arg_str; 113 } args[MAX_ARGS]; 114} CMD; 115 116static int B_flag = 0; /* replace boot code */ 117static int I_flag = 0; /* use entire disk for FreeBSD */ 118static int a_flag = 0; /* set active partition */ 119static char *b_flag = NULL; /* path to boot code */ 120static int i_flag = 0; /* replace partition data */ 121static int q_flag = 0; /* Be quiet */ 122static int u_flag = 0; /* update partition data */ 123static int s_flag = 0; /* Print a summary and exit */ 124static int t_flag = 0; /* test only */ 125static char *f_flag = NULL; /* Read config info from file */ 126static int v_flag = 0; /* Be verbose */ 127static int print_config_flag = 0; 128 129/* 130 * A list of partition types, probably outdated. 131 */ 132static const char *const part_types[256] = { 133 [0x00] = "unused", 134 [0x01] = "Primary DOS with 12 bit FAT", 135 [0x02] = "XENIX / file system", 136 [0x03] = "XENIX /usr file system", 137 [0x04] = "Primary DOS with 16 bit FAT (< 32MB)", 138 [0x05] = "Extended DOS", 139 [0x06] = "Primary DOS, 16 bit FAT (>= 32MB)", 140 [0x07] = "NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX", 141 [0x08] = "AIX file system or SplitDrive", 142 [0x09] = "AIX boot partition or Coherent", 143 [0x0A] = "OS/2 Boot Manager, OPUS or Coherent swap", 144 [0x0B] = "DOS or Windows 95 with 32 bit FAT", 145 [0x0C] = "DOS or Windows 95 with 32 bit FAT (LBA)", 146 [0x0E] = "Primary 'big' DOS (>= 32MB, LBA)", 147 [0x0F] = "Extended DOS (LBA)", 148 [0x10] = "OPUS", 149 [0x11] = "OS/2 BM: hidden DOS with 12-bit FAT", 150 [0x12] = "Compaq diagnostics", 151 [0x14] = "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)", 152 [0x16] = "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)", 153 [0x17] = "OS/2 BM: hidden IFS (e.g. HPFS)", 154 [0x18] = "AST Windows swapfile", 155 [0x1b] = "ASUS Recovery partition (NTFS)", 156 [0x24] = "NEC DOS", 157 [0x3C] = "PartitionMagic recovery", 158 [0x39] = "plan9", 159 [0x40] = "VENIX 286", 160 [0x41] = "Linux/MINIX (sharing disk with DRDOS)", 161 [0x42] = "SFS or Linux swap (sharing disk with DRDOS)", 162 [0x43] = "Linux native (sharing disk with DRDOS)", 163 [0x4D] = "QNX 4.2 Primary", 164 [0x4E] = "QNX 4.2 Secondary", 165 [0x4F] = "QNX 4.2 Tertiary", 166 [0x50] = "DM (disk manager)", 167 [0x51] = "DM6 Aux1 (or Novell)", 168 [0x52] = "CP/M or Microport SysV/AT", 169 [0x53] = "DM6 Aux3", 170 [0x54] = "DM6", 171 [0x55] = "EZ-Drive (disk manager)", 172 [0x56] = "Golden Bow (disk manager)", 173 [0x5c] = "Priam Edisk (disk manager)", /* according to S. Widlake */ 174 [0x61] = "SpeedStor", 175 [0x63] = "System V/386 (such as ISC UNIX), GNU HURD or Mach", 176 [0x64] = "Novell Netware/286 2.xx", 177 [0x65] = "Novell Netware/386 3.xx", 178 [0x6C] = "DragonFlyBSD", 179 [0x70] = "DiskSecure Multi-Boot", 180 [0x75] = "PCIX", 181 [0x77] = "QNX4.x", 182 [0x78] = "QNX4.x 2nd part", 183 [0x79] = "QNX4.x 3rd part", 184 [0x80] = "Minix until 1.4a", 185 [0x81] = "Minix since 1.4b, early Linux partition or Mitac disk manager", 186 [0x82] = "Linux swap or Solaris x86", 187 [0x83] = "Linux native", 188 [0x84] = "OS/2 hidden C: drive", 189 [0x85] = "Linux extended", 190 [0x86] = "NTFS volume set??", 191 [0x87] = "NTFS volume set??", 192 [0x93] = "Amoeba file system", 193 [0x94] = "Amoeba bad block table", 194 [0x9F] = "BSD/OS", 195 [0xA0] = "Suspend to Disk", 196 [0xA5] = "FreeBSD/NetBSD/386BSD", 197 [0xA6] = "OpenBSD", 198 [0xA7] = "NeXTSTEP", 199 [0xA9] = "NetBSD", 200 [0xAC] = "IBM JFS", 201 [0xAF] = "HFS+", 202 [0xB7] = "BSDI BSD/386 file system", 203 [0xB8] = "BSDI BSD/386 swap", 204 [0xBE] = "Solaris x86 boot", 205 [0xBF] = "Solaris x86 (new)", 206 [0xC1] = "DRDOS/sec with 12-bit FAT", 207 [0xC4] = "DRDOS/sec with 16-bit FAT (< 32MB)", 208 [0xC6] = "DRDOS/sec with 16-bit FAT (>= 32MB)", 209 [0xC7] = "Syrinx", 210 [0xDB] = "CP/M, Concurrent CP/M, Concurrent DOS or CTOS", 211 [0xDE] = "DELL Utilities - FAT filesystem", 212 [0xE1] = "DOS access or SpeedStor with 12-bit FAT extended partition", 213 [0xE3] = "DOS R/O or SpeedStor", 214 [0xE4] = "SpeedStor with 16-bit FAT extended partition < 1024 cyl.", 215 [0xEB] = "BeOS file system", 216 [0xEE] = "EFI GPT", 217 [0xEF] = "EFI System Partition", 218 [0xF1] = "SpeedStor", 219 [0xF2] = "DOS 3.3+ Secondary", 220 [0xF4] = "SpeedStor large partition", 221 [0xFB] = "VMware VMFS", 222 [0xFE] = "SpeedStor >1024 cyl. or LANstep", 223 [0xFF] = "Xenix bad blocks table", 224}; 225 226static const char * 227get_type(int t) 228{ 229 const char *ret; 230 231 ret = (t >= 0 && t <= 255) ? part_types[t] : NULL; 232 return ret ? ret : "unknown"; 233} 234 235 236static int geom_class_available(const char *); 237static void print_s0(void); 238static void print_part(const struct dos_partition *); 239static void init_sector0(unsigned long start); 240static void init_boot(void); 241static void change_part(int i); 242static void print_params(void); 243static void change_active(int which); 244static void change_code(void); 245static void get_params_to_use(void); 246static char *get_rootdisk(void); 247static void dos(struct dos_partition *partp); 248static int open_disk(int flag); 249static ssize_t read_disk(off_t sector, void *buf); 250static int write_disk(off_t sector, void *buf); 251static int get_params(void); 252static int read_s0(void); 253static int write_s0(void); 254static int ok(const char *str); 255static int decimal(const char *str, int *num, int deflt, uint32_t maxval); 256static int read_config(char *config_file); 257static void reset_boot(void); 258static int sanitize_partition(struct dos_partition *); 259static void usage(void) __dead2; 260 261int 262main(int argc, char *argv[]) 263{ 264 int c, i; 265 int partition = -1; 266 struct dos_partition *partp; 267 268 while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1) 269 switch (c) { 270 case 'B': 271 B_flag = 1; 272 break; 273 case 'I': 274 I_flag = 1; 275 break; 276 case 'a': 277 a_flag = 1; 278 break; 279 case 'b': 280 b_flag = optarg; 281 break; 282 case 'f': 283 f_flag = optarg; 284 break; 285 case 'i': 286 i_flag = 1; 287 break; 288 case 'p': 289 print_config_flag = 1; 290 break; 291 case 'q': 292 q_flag = 1; 293 break; 294 case 's': 295 s_flag = 1; 296 break; 297 case 't': 298 t_flag = 1; 299 break; 300 case 'u': 301 u_flag = 1; 302 break; 303 case 'v': 304 v_flag = 1; 305 break; 306 case '1': 307 case '2': 308 case '3': 309 case '4': 310 partition = c - '0'; 311 break; 312 default: 313 usage(); 314 } 315 if (f_flag || i_flag) 316 u_flag = 1; 317 if (t_flag) 318 v_flag = 1; 319 argc -= optind; 320 argv += optind; 321 322 if (argc == 0) { 323 disk = get_rootdisk(); 324 } else { 325 disk = g_device_path(argv[0]); 326 if (disk == NULL) 327 err(1, "unable to get correct path for %s", argv[0]); 328 } 329 if (open_disk(u_flag) < 0) 330 err(1, "cannot open disk %s", disk); 331 332 /* (abu)use mboot.bootinst to probe for the sector size */ 333 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) 334 err(1, "cannot allocate buffer to determine disk sector size"); 335 if (read_disk(0, mboot.bootinst) == -1) 336 errx(1, "could not detect sector size"); 337 free(mboot.bootinst); 338 mboot.bootinst = NULL; 339 340 if (print_config_flag) { 341 if (read_s0()) 342 err(1, "read_s0"); 343 344 printf("# %s\n", disk); 345 printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors); 346 347 for (i = 0; i < NDOSPART; i++) { 348 partp = &mboot.parts[i]; 349 350 if (partp->dp_start == 0 && partp->dp_size == 0) 351 continue; 352 353 printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ, 354 (u_long)partp->dp_start, (u_long)partp->dp_size); 355 356 /* Fill flags for the partition. */ 357 if (partp->dp_flag & 0x80) 358 printf("a %d\n", i + 1); 359 } 360 exit(0); 361 } 362 if (s_flag) { 363 if (read_s0()) 364 err(1, "read_s0"); 365 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, 366 dos_sectors); 367 printf("Part %11s %11s Type Flags\n", "Start", "Size"); 368 for (i = 0; i < NDOSPART; i++) { 369 partp = &mboot.parts[i]; 370 if (partp->dp_start == 0 && partp->dp_size == 0) 371 continue; 372 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, 373 (u_long) partp->dp_start, 374 (u_long) partp->dp_size, partp->dp_typ, 375 partp->dp_flag); 376 } 377 exit(0); 378 } 379 380 printf("******* Working on device %s *******\n",disk); 381 382 if (I_flag) { 383 read_s0(); 384 reset_boot(); 385 partp = &mboot.parts[0]; 386 partp->dp_typ = DOSPTYP_386BSD; 387 partp->dp_flag = ACTIVE; 388 partp->dp_start = dos_sectors; 389 partp->dp_size = rounddown(disksecs, dos_cylsecs) - 390 dos_sectors; 391 dos(partp); 392 if (v_flag) 393 print_s0(); 394 if (!t_flag) 395 write_s0(); 396 exit(0); 397 } 398 if (f_flag) { 399 if (read_s0() || i_flag) 400 reset_boot(); 401 if (!read_config(f_flag)) 402 exit(1); 403 if (v_flag) 404 print_s0(); 405 if (!t_flag) 406 write_s0(); 407 } else { 408 if(u_flag) 409 get_params_to_use(); 410 else 411 print_params(); 412 413 if (read_s0()) 414 init_sector0(dos_sectors); 415 416 printf("Media sector size is %d\n", secsize); 417 printf("Warning: BIOS sector numbering starts with sector 1\n"); 418 printf("Information from DOS bootblock is:\n"); 419 if (partition == -1) 420 for (i = 1; i <= NDOSPART; i++) 421 change_part(i); 422 else 423 change_part(partition); 424 425 if (u_flag || a_flag) 426 change_active(partition); 427 428 if (B_flag) 429 change_code(); 430 431 if (u_flag || a_flag || B_flag) { 432 if (!t_flag) { 433 printf("\nWe haven't changed the partition table yet. "); 434 printf("This is your last chance.\n"); 435 } 436 print_s0(); 437 if (!t_flag) { 438 if (ok("Should we write new partition table?")) 439 write_s0(); 440 } else { 441 printf("\n-t flag specified -- partition table not written.\n"); 442 } 443 } 444 } 445 446 exit(0); 447} 448 449static void 450usage(void) 451{ 452 fprintf(stderr, "%s%s", 453 "usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n", 454 " fdisk -f configfile [-itv] [disk]\n"); 455 exit(1); 456} 457 458static void 459print_s0(void) 460{ 461 int i; 462 463 print_params(); 464 printf("Information from DOS bootblock is:\n"); 465 for (i = 1; i <= NDOSPART; i++) { 466 printf("%d: ", i); 467 print_part(&mboot.parts[i - 1]); 468 } 469} 470 471static struct dos_partition mtpart; 472 473static void 474print_part(const struct dos_partition *partp) 475{ 476 u_int64_t part_mb; 477 478 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { 479 printf("<UNUSED>\n"); 480 return; 481 } 482 /* 483 * Be careful not to overflow. 484 */ 485 part_mb = partp->dp_size; 486 part_mb *= secsize; 487 part_mb /= (1024 * 1024); 488 printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ, 489 get_type(partp->dp_typ)); 490 printf(" start %lu, size %lu (%ju Meg), flag %x%s\n", 491 (u_long)partp->dp_start, 492 (u_long)partp->dp_size, 493 (uintmax_t)part_mb, 494 partp->dp_flag, 495 partp->dp_flag == ACTIVE ? " (active)" : ""); 496 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" 497 ,DPCYL(partp->dp_scyl, partp->dp_ssect) 498 ,partp->dp_shd 499 ,DPSECT(partp->dp_ssect) 500 ,DPCYL(partp->dp_ecyl, partp->dp_esect) 501 ,partp->dp_ehd 502 ,DPSECT(partp->dp_esect)); 503} 504 505 506static void 507init_boot(void) 508{ 509 const char *fname; 510 int fdesc, n; 511 struct stat sb; 512 513 fname = b_flag ? b_flag : "/boot/mbr"; 514 if ((fdesc = open(fname, O_RDONLY)) == -1 || 515 fstat(fdesc, &sb) == -1) 516 err(1, "%s", fname); 517 if (sb.st_size == 0) 518 errx(1, "%s is empty, must not be.", fname); 519 if ((mboot.bootinst_size = sb.st_size) % secsize != 0) 520 errx(1, "%s: length must be a multiple of sector size", fname); 521 if (mboot.bootinst != NULL) 522 free(mboot.bootinst); 523 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) 524 errx(1, "%s: unable to allocate read buffer", fname); 525 if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 || 526 close(fdesc)) 527 err(1, "%s", fname); 528 if (n != mboot.bootinst_size) 529 errx(1, "%s: short read", fname); 530} 531 532 533static void 534init_sector0(unsigned long start) 535{ 536 struct dos_partition *partp = &mboot.parts[0]; 537 538 init_boot(); 539 540 partp->dp_typ = DOSPTYP_386BSD; 541 partp->dp_flag = ACTIVE; 542 start = roundup(start, dos_sectors); 543 if(start == 0) 544 start = dos_sectors; 545 partp->dp_start = start; 546 partp->dp_size = rounddown(disksecs, dos_cylsecs) - start; 547 548 dos(partp); 549} 550 551static void 552change_part(int i) 553{ 554 struct dos_partition *partp = &mboot.parts[i - 1]; 555 556 printf("The data for partition %d is:\n", i); 557 print_part(partp); 558 559 if (u_flag && ok("Do you want to change it?")) { 560 int tmp; 561 562 if (i_flag) { 563 bzero(partp, sizeof (*partp)); 564 if (i == 1) { 565 init_sector0(1); 566 printf("\nThe static data for the slice 1 has been reinitialized to:\n"); 567 print_part(partp); 568 } 569 } 570 571 do { 572 Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp, 255); 573 Decimal("start", partp->dp_start, tmp, NO_DISK_SECTORS); 574 Decimal("size", partp->dp_size, tmp, NO_DISK_SECTORS); 575 if (!sanitize_partition(partp)) { 576 warnx("ERROR: failed to adjust; setting sysid to 0"); 577 partp->dp_typ = 0; 578 } 579 580 if (ok("Explicitly specify beg/end address ?")) 581 { 582 int tsec,tcyl,thd; 583 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); 584 thd = partp->dp_shd; 585 tsec = DPSECT(partp->dp_ssect); 586 Decimal("beginning cylinder", tcyl, tmp, NO_TRACK_CYLINDERS); 587 Decimal("beginning head", thd, tmp, NO_TRACK_HEADS); 588 Decimal("beginning sector", tsec, tmp, NO_TRACK_SECTORS); 589 partp->dp_scyl = DOSCYL(tcyl); 590 partp->dp_ssect = DOSSECT(tsec,tcyl); 591 partp->dp_shd = thd; 592 593 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); 594 thd = partp->dp_ehd; 595 tsec = DPSECT(partp->dp_esect); 596 Decimal("ending cylinder", tcyl, tmp, NO_TRACK_CYLINDERS); 597 Decimal("ending head", thd, tmp, NO_TRACK_HEADS); 598 Decimal("ending sector", tsec, tmp, NO_TRACK_SECTORS); 599 partp->dp_ecyl = DOSCYL(tcyl); 600 partp->dp_esect = DOSSECT(tsec,tcyl); 601 partp->dp_ehd = thd; 602 } else 603 dos(partp); 604 605 print_part(partp); 606 } while (!ok("Are we happy with this entry?")); 607 } 608} 609 610static void 611print_params(void) 612{ 613 printf("parameters extracted from in-core disklabel are:\n"); 614 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 615 ,cyls,heads,sectors,cylsecs); 616 if (dos_cyls > 1023 || dos_heads > 255 || dos_sectors > 63) 617 printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); 618 printf("parameters to be used for BIOS calculations are:\n"); 619 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 620 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); 621} 622 623static void 624change_active(int which) 625{ 626 struct dos_partition *partp = &mboot.parts[0]; 627 int active, i, new, tmp; 628 629 active = -1; 630 for (i = 0; i < NDOSPART; i++) { 631 if ((partp[i].dp_flag & ACTIVE) == 0) 632 continue; 633 printf("Partition %d is marked active\n", i + 1); 634 if (active == -1) 635 active = i + 1; 636 } 637 if (a_flag && which != -1) 638 active = which; 639 else if (active == -1) 640 active = 1; 641 642 if (!ok("Do you want to change the active partition?")) 643 return; 644setactive: 645 do { 646 new = active; 647 Decimal("active partition", new, tmp, 0); 648 if (new < 1 || new > 4) { 649 printf("Active partition number must be in range 1-4." 650 " Try again.\n"); 651 goto setactive; 652 } 653 active = new; 654 } while (!ok("Are you happy with this choice")); 655 for (i = 0; i < NDOSPART; i++) 656 partp[i].dp_flag = 0; 657 if (active > 0 && active <= NDOSPART) 658 partp[active-1].dp_flag = ACTIVE; 659} 660 661static void 662change_code(void) 663{ 664 if (ok("Do you want to change the boot code?")) 665 init_boot(); 666} 667 668void 669get_params_to_use(void) 670{ 671 int tmp; 672 print_params(); 673 if (ok("Do you want to change our idea of what BIOS thinks ?")) 674 { 675 do 676 { 677 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp, 0); 678 Decimal("BIOS's idea of #heads", dos_heads, tmp, 0); 679 Decimal("BIOS's idea of #sectors", dos_sectors, tmp, 0); 680 dos_cylsecs = dos_heads * dos_sectors; 681 print_params(); 682 } 683 while(!ok("Are you happy with this choice")); 684 } 685} 686 687 688/***********************************************\ 689* Change real numbers into strange dos numbers * 690\***********************************************/ 691static void 692dos(struct dos_partition *partp) 693{ 694 int cy, sec; 695 u_int32_t end; 696 697 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) { 698 memcpy(partp, &mtpart, sizeof(*partp)); 699 return; 700 } 701 702 /* Start c/h/s. */ 703 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors; 704 cy = partp->dp_start / dos_cylsecs; 705 sec = partp->dp_start % dos_sectors + 1; 706 partp->dp_scyl = DOSCYL(cy); 707 partp->dp_ssect = DOSSECT(sec, cy); 708 709 /* End c/h/s. */ 710 end = partp->dp_start + partp->dp_size - 1; 711 partp->dp_ehd = end % dos_cylsecs / dos_sectors; 712 cy = end / dos_cylsecs; 713 sec = end % dos_sectors + 1; 714 partp->dp_ecyl = DOSCYL(cy); 715 partp->dp_esect = DOSSECT(sec, cy); 716} 717 718static int 719open_disk(int flag) 720{ 721 int rwmode; 722 723 /* Write mode if one of these flags are set. */ 724 rwmode = (a_flag || I_flag || B_flag || flag); 725 fd = g_open(disk, rwmode); 726 /* If the mode fails, try read-only if we didn't. */ 727 if (fd == -1 && errno == EPERM && rwmode) 728 fd = g_open(disk, 0); 729 if (fd == -1 && errno == ENXIO) 730 return -2; 731 if (fd == -1) { 732 warnx("can't open device %s", disk); 733 return -1; 734 } 735 if (get_params() == -1) { 736 warnx("can't get disk parameters on %s", disk); 737 return -1; 738 } 739 return fd; 740} 741 742static ssize_t 743read_disk(off_t sector, void *buf) 744{ 745 746 lseek(fd, (sector * 512), 0); 747 if (secsize == 0) 748 for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; 749 secsize *= 2) { 750 /* try the read */ 751 int size = read(fd, buf, secsize); 752 if (size == secsize) 753 /* it worked so return */ 754 return secsize; 755 } 756 else 757 return read(fd, buf, secsize); 758 759 /* we failed to read at any of the sizes */ 760 return -1; 761} 762 763static int 764geom_class_available(const char *name) 765{ 766 struct gclass *class; 767 struct gmesh mesh; 768 int error; 769 770 error = geom_gettree(&mesh); 771 if (error != 0) 772 errc(1, error, "Cannot get GEOM tree"); 773 774 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 775 if (strcmp(class->lg_name, name) == 0) { 776 geom_deletetree(&mesh); 777 return (1); 778 } 779 } 780 781 geom_deletetree(&mesh); 782 783 return (0); 784} 785 786static int 787write_disk(off_t sector, void *buf) 788{ 789 ssize_t wr; 790 791 /* 792 * Try to write MBR directly. This may help when disk 793 * is not in use. 794 * XXX: hardcoded sectorsize 795 */ 796 wr = pwrite(fd, buf, secsize, (sector * 512)); 797 if (wr == secsize) 798 return (0); 799 800 if (geom_class_available("PART") != 0) 801 warnx("Failed to write MBR. Try to use gpart(8)."); 802 else 803 warnx("Failed to write sector zero"); 804 return(EINVAL); 805} 806 807static int 808get_params(void) 809{ 810 int error; 811 u_int u; 812 off_t o; 813 814 error = ioctl(fd, DIOCGFWSECTORS, &u); 815 if (error == 0) 816 sectors = dos_sectors = u; 817 else 818 sectors = dos_sectors = 63; 819 820 error = ioctl(fd, DIOCGFWHEADS, &u); 821 if (error == 0) 822 heads = dos_heads = u; 823 else 824 heads = dos_heads = 255; 825 826 dos_cylsecs = cylsecs = heads * sectors; 827 disksecs = cyls * heads * sectors; 828 829 u = g_sectorsize(fd); 830 if (u <= 0) 831 return (-1); 832 833 o = g_mediasize(fd); 834 if (o < 0) 835 return (-1); 836 if (o / u <= NO_DISK_SECTORS) 837 disksecs = o / u; 838 else 839 disksecs = NO_DISK_SECTORS; 840 cyls = dos_cyls = o / (u * dos_heads * dos_sectors); 841 842 return (0); 843} 844 845static int 846read_s0(void) 847{ 848 int i; 849 850 mboot.bootinst_size = secsize; 851 if (mboot.bootinst != NULL) 852 free(mboot.bootinst); 853 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { 854 warnx("unable to allocate buffer to read fdisk " 855 "partition table"); 856 return -1; 857 } 858 if (read_disk(0, mboot.bootinst) == -1) { 859 warnx("can't read fdisk partition table"); 860 return -1; 861 } 862 if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) { 863 warnx("invalid fdisk partition table found"); 864 /* So should we initialize things */ 865 return -1; 866 } 867 for (i = 0; i < NDOSPART; i++) 868 dos_partition_dec( 869 &mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE], 870 &mboot.parts[i]); 871 return 0; 872} 873 874static int 875write_s0(void) 876{ 877 int sector, i; 878 879 if (iotest) { 880 print_s0(); 881 return 0; 882 } 883 for(i = 0; i < NDOSPART; i++) 884 dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE], 885 &mboot.parts[i]); 886 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC); 887 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) 888 if (write_disk(sector, 889 &mboot.bootinst[sector * secsize]) == -1) { 890 warn("can't write fdisk partition table"); 891 return -1; 892 } 893 return(0); 894} 895 896 897static int 898ok(const char *str) 899{ 900 printf("%s [n] ", str); 901 fflush(stdout); 902 if (fgets(lbuf, LBUF, stdin) == NULL) 903 exit(1); 904 lbuf[strlen(lbuf)-1] = 0; 905 906 if (*lbuf && 907 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || 908 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) 909 return 1; 910 else 911 return 0; 912} 913 914static int 915decimal(const char *str, int *num, int deflt, uint32_t maxval) 916{ 917 long long acc; 918 int c; 919 char *cp; 920 921 while (1) { 922 acc = 0; 923 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); 924 fflush(stdout); 925 if (fgets(lbuf, LBUF, stdin) == NULL) 926 exit(1); 927 lbuf[strlen(lbuf)-1] = 0; 928 929 if (!*lbuf) 930 return 0; 931 932 cp = lbuf; 933 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 934 if (!c) 935 return 0; 936 while ((c = *cp++)) { 937 if (c <= '9' && c >= '0') { 938 if (acc <= maxval || maxval == 0) 939 acc = acc * 10 + c - '0'; 940 } else 941 break; 942 } 943 if (c == ' ' || c == '\t') 944 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 945 if (!c) { 946 if (maxval > 0 && acc > maxval) { 947 acc = maxval; 948 printf("%s exceeds maximum value allowed for " 949 "this field. The value has been reduced " 950 "to %lld\n", lbuf, acc); 951 } 952 *num = acc; 953 return 1; 954 } else 955 printf("%s is an invalid decimal number. Try again.\n", 956 lbuf); 957 } 958} 959 960 961static void 962parse_config_line(char *line, CMD *command) 963{ 964 char *cp, *end; 965 966 cp = line; 967 while (1) { 968 memset(command, 0, sizeof(*command)); 969 970 while (isspace(*cp)) ++cp; 971 if (*cp == '\0' || *cp == '#') 972 break; 973 command->cmd = *cp++; 974 975 /* 976 * Parse args 977 */ 978 while (1) { 979 while (isspace(*cp)) ++cp; 980 if (*cp == '\0') 981 break; /* eol */ 982 if (*cp == '#') 983 break; /* found comment */ 984 if (isalpha(*cp)) 985 command->args[command->n_args].argtype = *cp++; 986 end = NULL; 987 command->args[command->n_args].arg_val = strtoul(cp, &end, 0); 988 if (cp == end || (!isspace(*end) && *end != '\0')) { 989 char ch; 990 end = cp; 991 while (!isspace(*end) && *end != '\0') ++end; 992 ch = *end; *end = '\0'; 993 command->args[command->n_args].arg_str = strdup(cp); 994 *end = ch; 995 } else 996 command->args[command->n_args].arg_str = NULL; 997 cp = end; 998 command->n_args++; 999 } 1000 break; 1001 } 1002} 1003 1004 1005static int 1006process_geometry(CMD *command) 1007{ 1008 int status = 1, i; 1009 1010 while (1) { 1011 geom_processed = 1; 1012 if (part_processed) { 1013 warnx( 1014 "ERROR line %d: the geometry specification line must occur before\n\ 1015 all partition specifications", 1016 current_line_number); 1017 status = 0; 1018 break; 1019 } 1020 if (command->n_args != 3) { 1021 warnx("ERROR line %d: incorrect number of geometry args", 1022 current_line_number); 1023 status = 0; 1024 break; 1025 } 1026 dos_cyls = 0; 1027 dos_heads = 0; 1028 dos_sectors = 0; 1029 for (i = 0; i < 3; ++i) { 1030 switch (command->args[i].argtype) { 1031 case 'c': 1032 dos_cyls = command->args[i].arg_val; 1033 break; 1034 case 'h': 1035 dos_heads = command->args[i].arg_val; 1036 break; 1037 case 's': 1038 dos_sectors = command->args[i].arg_val; 1039 break; 1040 default: 1041 warnx( 1042 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)", 1043 current_line_number, command->args[i].argtype, 1044 command->args[i].argtype); 1045 status = 0; 1046 break; 1047 } 1048 } 1049 if (status == 0) 1050 break; 1051 1052 dos_cylsecs = dos_heads * dos_sectors; 1053 1054 /* 1055 * Do sanity checks on parameter values 1056 */ 1057 if (dos_cyls == 0) { 1058 warnx("ERROR line %d: number of cylinders not specified", 1059 current_line_number); 1060 status = 0; 1061 } 1062 if (dos_cyls > 1024) { 1063 warnx( 1064 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ 1065 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ 1066 is dedicated to FreeBSD)", 1067 current_line_number, dos_cyls); 1068 } 1069 1070 if (dos_heads == 0) { 1071 warnx("ERROR line %d: number of heads not specified", 1072 current_line_number); 1073 status = 0; 1074 } else if (dos_heads > 256) { 1075 warnx("ERROR line %d: number of heads must be within (1-256)", 1076 current_line_number); 1077 status = 0; 1078 } 1079 1080 if (dos_sectors == 0) { 1081 warnx("ERROR line %d: number of sectors not specified", 1082 current_line_number); 1083 status = 0; 1084 } else if (dos_sectors > 63) { 1085 warnx("ERROR line %d: number of sectors must be within (1-63)", 1086 current_line_number); 1087 status = 0; 1088 } 1089 1090 break; 1091 } 1092 return (status); 1093} 1094 1095static u_int32_t 1096str2sectors(const char *str) 1097{ 1098 char *end; 1099 unsigned long val; 1100 1101 val = strtoul(str, &end, 0); 1102 if (str == end || *end == '\0') { 1103 warnx("ERROR line %d: unexpected size: \'%s\'", 1104 current_line_number, str); 1105 return NO_DISK_SECTORS; 1106 } 1107 1108 if (*end == 'K') 1109 val *= 1024UL / secsize; 1110 else if (*end == 'M') 1111 val *= 1024UL * 1024UL / secsize; 1112 else if (*end == 'G') 1113 val *= 1024UL * 1024UL * 1024UL / secsize; 1114 else { 1115 warnx("ERROR line %d: unexpected modifier: %c " 1116 "(not K/M/G)", current_line_number, *end); 1117 return NO_DISK_SECTORS; 1118 } 1119 1120 return val; 1121} 1122 1123static int 1124process_partition(CMD *command) 1125{ 1126 int status = 0, partition; 1127 u_int32_t prev_head_boundary, prev_cyl_boundary; 1128 u_int32_t adj_size, max_end; 1129 struct dos_partition *partp; 1130 1131 while (1) { 1132 part_processed = 1; 1133 if (command->n_args != 4) { 1134 warnx("ERROR line %d: incorrect number of partition args", 1135 current_line_number); 1136 break; 1137 } 1138 partition = command->args[0].arg_val; 1139 if (partition < 1 || partition > 4) { 1140 warnx("ERROR line %d: invalid partition number %d", 1141 current_line_number, partition); 1142 break; 1143 } 1144 partp = &mboot.parts[partition - 1]; 1145 bzero(partp, sizeof (*partp)); 1146 partp->dp_typ = command->args[1].arg_val; 1147 if (command->args[2].arg_str != NULL) { 1148 if (strcmp(command->args[2].arg_str, "*") == 0) { 1149 int i; 1150 partp->dp_start = dos_sectors; 1151 for (i = 1; i < partition; i++) { 1152 struct dos_partition *prev_partp; 1153 prev_partp = ((struct dos_partition *) 1154 &mboot.parts) + i - 1; 1155 if (prev_partp->dp_typ != 0) 1156 partp->dp_start = prev_partp->dp_start + 1157 prev_partp->dp_size; 1158 } 1159 if (partp->dp_start % dos_sectors != 0) { 1160 prev_head_boundary = rounddown(partp->dp_start, 1161 dos_sectors); 1162 partp->dp_start = prev_head_boundary + 1163 dos_sectors; 1164 } 1165 } else { 1166 partp->dp_start = str2sectors(command->args[2].arg_str); 1167 if (partp->dp_start == NO_DISK_SECTORS) 1168 break; 1169 } 1170 } else 1171 partp->dp_start = command->args[2].arg_val; 1172 1173 if (command->args[3].arg_str != NULL) { 1174 if (strcmp(command->args[3].arg_str, "*") == 0) 1175 partp->dp_size = rounddown(disksecs, dos_cylsecs) - 1176 partp->dp_start; 1177 else { 1178 partp->dp_size = str2sectors(command->args[3].arg_str); 1179 if (partp->dp_size == NO_DISK_SECTORS) 1180 break; 1181 } 1182 prev_cyl_boundary = rounddown(partp->dp_start + partp->dp_size, 1183 dos_cylsecs); 1184 if (prev_cyl_boundary > partp->dp_start) 1185 partp->dp_size = prev_cyl_boundary - partp->dp_start; 1186 } else 1187 partp->dp_size = command->args[3].arg_val; 1188 1189 max_end = partp->dp_start + partp->dp_size; 1190 1191 if (partp->dp_typ == 0) { 1192 /* 1193 * Get out, the partition is marked as unused. 1194 */ 1195 /* 1196 * Insure that it's unused. 1197 */ 1198 bzero(partp, sizeof(*partp)); 1199 status = 1; 1200 break; 1201 } 1202 1203 /* 1204 * Adjust start upwards, if necessary, to fall on a head boundary. 1205 */ 1206 if (partp->dp_start % dos_sectors != 0) { 1207 prev_head_boundary = rounddown(partp->dp_start, dos_sectors); 1208 if (max_end < dos_sectors || 1209 prev_head_boundary > max_end - dos_sectors) { 1210 /* 1211 * Can't go past end of partition 1212 */ 1213 warnx( 1214 "ERROR line %d: unable to adjust start of partition %d to fall on\n\ 1215 a head boundary", 1216 current_line_number, partition); 1217 break; 1218 } 1219 warnx( 1220 "WARNING: adjusting start offset of partition %d\n\ 1221 from %u to %u, to fall on a head boundary", 1222 partition, (u_int)partp->dp_start, 1223 (u_int)(prev_head_boundary + dos_sectors)); 1224 partp->dp_start = prev_head_boundary + dos_sectors; 1225 } 1226 1227 /* 1228 * Adjust size downwards, if necessary, to fall on a cylinder 1229 * boundary. 1230 */ 1231 prev_cyl_boundary = rounddown(partp->dp_start + partp->dp_size, 1232 dos_cylsecs); 1233 if (prev_cyl_boundary > partp->dp_start) 1234 adj_size = prev_cyl_boundary - partp->dp_start; 1235 else { 1236 warnx( 1237 "ERROR: could not adjust partition to start on a head boundary\n\ 1238 and end on a cylinder boundary."); 1239 return (0); 1240 } 1241 if (adj_size != partp->dp_size) { 1242 warnx( 1243 "WARNING: adjusting size of partition %d from %u to %u\n\ 1244 to end on a cylinder boundary", 1245 partition, (u_int)partp->dp_size, (u_int)adj_size); 1246 partp->dp_size = adj_size; 1247 } 1248 if (partp->dp_size == 0) { 1249 warnx("ERROR line %d: size of partition %d is zero", 1250 current_line_number, partition); 1251 break; 1252 } 1253 1254 dos(partp); 1255 status = 1; 1256 break; 1257 } 1258 return (status); 1259} 1260 1261 1262static int 1263process_active(CMD *command) 1264{ 1265 int status = 0, partition, i; 1266 struct dos_partition *partp; 1267 1268 while (1) { 1269 active_processed = 1; 1270 if (command->n_args != 1) { 1271 warnx("ERROR line %d: incorrect number of active args", 1272 current_line_number); 1273 status = 0; 1274 break; 1275 } 1276 partition = command->args[0].arg_val; 1277 if (partition < 1 || partition > 4) { 1278 warnx("ERROR line %d: invalid partition number %d", 1279 current_line_number, partition); 1280 break; 1281 } 1282 /* 1283 * Reset active partition 1284 */ 1285 partp = mboot.parts; 1286 for (i = 0; i < NDOSPART; i++) 1287 partp[i].dp_flag = 0; 1288 partp[partition-1].dp_flag = ACTIVE; 1289 1290 status = 1; 1291 break; 1292 } 1293 return (status); 1294} 1295 1296 1297static int 1298process_line(char *line) 1299{ 1300 CMD command; 1301 int status = 1; 1302 1303 while (1) { 1304 parse_config_line(line, &command); 1305 switch (command.cmd) { 1306 case 0: 1307 /* 1308 * Comment or blank line 1309 */ 1310 break; 1311 case 'g': 1312 /* 1313 * Set geometry 1314 */ 1315 status = process_geometry(&command); 1316 break; 1317 case 'p': 1318 status = process_partition(&command); 1319 break; 1320 case 'a': 1321 status = process_active(&command); 1322 break; 1323 default: 1324 status = 0; 1325 break; 1326 } 1327 break; 1328 } 1329 return (status); 1330} 1331 1332 1333static int 1334read_config(char *config_file) 1335{ 1336 FILE *fp = NULL; 1337 int status = 1; 1338 char buf[1010]; 1339 1340 while (1) { 1341 if (strcmp(config_file, "-") != 0) { 1342 /* 1343 * We're not reading from stdin 1344 */ 1345 if ((fp = fopen(config_file, "r")) == NULL) { 1346 status = 0; 1347 break; 1348 } 1349 } else { 1350 fp = stdin; 1351 } 1352 current_line_number = 0; 1353 while (!feof(fp)) { 1354 if (fgets(buf, sizeof(buf), fp) == NULL) 1355 break; 1356 ++current_line_number; 1357 status = process_line(buf); 1358 if (status == 0) 1359 break; 1360 } 1361 break; 1362 } 1363 if (fp) { 1364 /* 1365 * It doesn't matter if we're reading from stdin, as we've reached EOF 1366 */ 1367 fclose(fp); 1368 } 1369 return (status); 1370} 1371 1372 1373static void 1374reset_boot(void) 1375{ 1376 int i; 1377 struct dos_partition *partp; 1378 1379 init_boot(); 1380 for (i = 0; i < 4; ++i) { 1381 partp = &mboot.parts[i]; 1382 bzero(partp, sizeof(*partp)); 1383 } 1384} 1385 1386static int 1387sanitize_partition(struct dos_partition *partp) 1388{ 1389 u_int32_t prev_head_boundary, prev_cyl_boundary; 1390 u_int32_t max_end, size, start; 1391 1392 start = partp->dp_start; 1393 size = partp->dp_size; 1394 max_end = start + size; 1395 /* Only allow a zero size if the partition is being marked unused. */ 1396 if (size == 0) { 1397 if (start == 0 && partp->dp_typ == 0) 1398 return (1); 1399 warnx("ERROR: size of partition is zero"); 1400 return (0); 1401 } 1402 /* Return if no adjustment is necessary. */ 1403 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0) 1404 return (1); 1405 1406 if (start == 0) { 1407 warnx("WARNING: partition overlaps with partition table"); 1408 if (ok("Correct this automatically?")) 1409 start = dos_sectors; 1410 } 1411 if (start % dos_sectors != 0) 1412 warnx("WARNING: partition does not start on a head boundary"); 1413 if ((start +size) % dos_sectors != 0) 1414 warnx("WARNING: partition does not end on a cylinder boundary"); 1415 warnx("WARNING: this may confuse the BIOS or some operating systems"); 1416 if (!ok("Correct this automatically?")) 1417 return (1); 1418 1419 /* 1420 * Adjust start upwards, if necessary, to fall on a head boundary. 1421 */ 1422 if (start % dos_sectors != 0) { 1423 prev_head_boundary = rounddown(start, dos_sectors); 1424 if (max_end < dos_sectors || 1425 prev_head_boundary >= max_end - dos_sectors) { 1426 /* 1427 * Can't go past end of partition 1428 */ 1429 warnx( 1430 "ERROR: unable to adjust start of partition to fall on a head boundary"); 1431 return (0); 1432 } 1433 start = prev_head_boundary + dos_sectors; 1434 } 1435 1436 /* 1437 * Adjust size downwards, if necessary, to fall on a cylinder 1438 * boundary. 1439 */ 1440 prev_cyl_boundary = rounddown(start + size, dos_cylsecs); 1441 if (prev_cyl_boundary > start) 1442 size = prev_cyl_boundary - start; 1443 else { 1444 warnx("ERROR: could not adjust partition to start on a head boundary\n\ 1445 and end on a cylinder boundary."); 1446 return (0); 1447 } 1448 1449 /* Finally, commit any changes to partp and return. */ 1450 if (start != partp->dp_start) { 1451 warnx("WARNING: adjusting start offset of partition to %u", 1452 (u_int)start); 1453 partp->dp_start = start; 1454 } 1455 if (size != partp->dp_size) { 1456 warnx("WARNING: adjusting size of partition to %u", (u_int)size); 1457 partp->dp_size = size; 1458 } 1459 1460 return (1); 1461} 1462 1463/* 1464 * Try figuring out the root device's canonical disk name. 1465 * The following choices are considered: 1466 * /dev/ad0s1a => /dev/ad0 1467 * /dev/da0a => /dev/da0 1468 * /dev/vinum/root => /dev/vinum/root 1469 * A ".eli" part is removed if it exists (see geli(8)). 1470 * A ".journal" ending is removed if it exists (see gjournal(8)). 1471 */ 1472static char * 1473get_rootdisk(void) 1474{ 1475 struct statfs rootfs; 1476 regex_t re; 1477#define NMATCHES 2 1478 regmatch_t rm[NMATCHES]; 1479 char dev[PATH_MAX], *s; 1480 int rv; 1481 1482 if (statfs("/", &rootfs) == -1) 1483 err(1, "statfs(\"/\")"); 1484 1485 if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]*)([sp][0-9]+)?[a-h]?(\\.journal)?$", 1486 REG_EXTENDED)) != 0) 1487 errx(1, "regcomp() failed (%d)", rv); 1488 strlcpy(dev, rootfs.f_mntfromname, sizeof (dev)); 1489 if ((s = strstr(dev, ".eli")) != NULL) 1490 memmove(s, s+4, strlen(s + 4) + 1); 1491 1492 if ((rv = regexec(&re, dev, NMATCHES, rm, 0)) != 0) 1493 errx(1, 1494"mounted root fs resource doesn't match expectations (regexec returned %d)", 1495 rv); 1496 if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL) 1497 errx(1, "out of memory"); 1498 memcpy(s, rootfs.f_mntfromname + rm[1].rm_so, 1499 rm[1].rm_eo - rm[1].rm_so); 1500 s[rm[1].rm_eo - rm[1].rm_so] = 0; 1501 1502 return s; 1503} 1504