fdisk.c revision 1.136
1 /* $NetBSD: fdisk.c,v 1.136 2011/12/02 03:04:11 christos Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1992 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie Mellon 26 * the rights to redistribute these changes. 27 */ 28 29 /* 30 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University 31 * Copyright (c) 1989 Robert. V. Baron 32 * Created. 33 */ 34 35 #if HAVE_NBTOOL_CONFIG_H 36 #include "nbtool_config.h" 37 #endif 38 39 #include <sys/cdefs.h> 40 41 #ifndef lint 42 __RCSID("$NetBSD: fdisk.c,v 1.136 2011/12/02 03:04:11 christos Exp $"); 43 #endif /* not lint */ 44 45 #define MBRPTYPENAMES 46 #include <sys/types.h> 47 #include <sys/param.h> 48 #include <sys/stat.h> 49 #include <ctype.h> 50 #include <err.h> 51 #include <errno.h> 52 #include <fcntl.h> 53 #include <paths.h> 54 #include <stdarg.h> 55 #include <stddef.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 #include <vis.h> 61 62 #if !HAVE_NBTOOL_CONFIG_H 63 #include <sys/disklabel.h> 64 #include <sys/disklabel_gpt.h> 65 #include <sys/bootblock.h> 66 #include <sys/ioctl.h> 67 #include <sys/sysctl.h> 68 #include <disktab.h> 69 #include <util.h> 70 #include <zlib.h> 71 #else 72 #include <nbinclude/sys/disklabel.h> 73 #include <nbinclude/sys/disklabel_gpt.h> 74 #include <nbinclude/sys/bootblock.h> 75 #include "../../include/disktab.h" 76 /* We enforce -F, so none of these possibly undefined items can be needed */ 77 #define opendisk(path, fl, buf, buflen, cooked) (-1) 78 #ifndef DIOCGDEFLABEL 79 #define DIOCGDEFLABEL 0 80 #endif 81 #ifndef DIOCGDINFO 82 #define DIOCGDINFO 0 83 #endif 84 #ifndef DIOCWLABEL 85 #define DIOCWLABEL 0 86 #endif 87 #endif /* HAVE_NBTOOL_CONFIG_H */ 88 89 #define DEFAULT_BOOTDIR "/usr/mdec" 90 91 #define LE_MBR_MAGIC htole16(MBR_MAGIC) 92 #define LE_MBR_BS_MAGIC htole16(MBR_BS_MAGIC) 93 94 #if defined(__i386__) || defined(__x86_64__) 95 #if !HAVE_NBTOOL_CONFIG_H 96 #include <machine/cpu.h> 97 #endif /* !HAVE_NBTOOL_CONFIG_H */ 98 #define BOOTSEL 99 #endif 100 101 #ifdef BOOTSEL 102 103 #define DEFAULT_BOOTCODE "mbr" 104 #define DEFAULT_BOOTSELCODE "mbr_bootsel" 105 #define DEFAULT_BOOTEXTCODE "mbr_ext" 106 107 /* Scan values for the various keys we use, as returned by the BIOS */ 108 #define SCAN_ENTER 0x1c 109 #define SCAN_F1 0x3b 110 #define SCAN_1 0x2 111 112 113 #define MAX_BIOS_DISKS 16 /* Going beyond F12 is hard though! */ 114 115 /* We same the dflt 'boot partition' as a disk block, with some magic values. */ 116 #define DEFAULT_ACTIVE (~(daddr_t)0) 117 #define DEFAULT_DISK(n) (DEFAULT_ACTIVE - MAX_BIOS_DISKS + (n)) 118 119 #endif 120 121 #define GPT_TYPE(offs) ((offs) == GPT_HDR_BLKNO ? "primary" : "secondary") 122 123 #ifndef PRIdaddr 124 #define PRIdaddr PRId64 125 #endif 126 127 #ifndef _PATH_DEFDISK 128 #define _PATH_DEFDISK "/dev/rwd0d" 129 #endif 130 131 struct { 132 struct mbr_sector *ptn; /* array of pbrs */ 133 daddr_t base; /* first sector of ext. ptn */ 134 daddr_t limit; /* last sector of ext. ptn */ 135 int num_ptn; /* number of contained partitions */ 136 int ptn_id; /* entry in mbr */ 137 int is_corrupt; /* 1 if extended chain illegal */ 138 } ext; 139 140 #define LBUF 100 141 static char lbuf[LBUF]; 142 143 static const char *disk = _PATH_DEFDISK; 144 145 static struct disklabel disklabel; /* disk parameters */ 146 147 static struct mbr_sector mboot; 148 149 static const char *boot_dir = DEFAULT_BOOTDIR; 150 static char *boot_path = NULL; /* name of file we actually opened */ 151 152 #ifdef BOOTSEL 153 #define BOOTSEL_OPTIONS "B" 154 #else 155 #define BOOTSEL_OPTIONS 156 #define change_part(e, p, id, st, sz, bm) change__part(e, p, id, st, sz) 157 #endif 158 #define OPTIONS BOOTSEL_OPTIONS "0123FSafiluvA:b:c:E:r:s:w:" 159 160 /* 161 * Disk geometry and partition alignment. 162 * 163 * Modern disks do not have a fixed geomery and will always give a 'faked' 164 * geometry that matches the ATA standard - max 16 heads and 256 sec/track. 165 * The ATA geometry allows access to 2^28 sectors (as does LBA mode). 166 * 167 * The BIOS calls originally used an 8bit register for cylinder, head and 168 * sector. Later 2 bits were stolen from the sector number and added to 169 * cylinder number. The BIOS will translate this faked geometry either to 170 * the geometry reported by the disk, or do LBA reads (possibly LBA48). 171 * BIOS CHS reads have all sorts of limits, but 2^24 is absolute. 172 * For historic reasons the BIOS geometry is the called the dos geometry! 173 * 174 * If you know the disks real geometry it is usually worth aligning 175 * disk partitions to cylinder boundaries (certainly traditional!). 176 * For 'mbr' disks this has always been done with the BIOS geometry. 177 * The first track (typically 63 sectors) is reserved because the first 178 * sector is used for boot code. Similarly the data partition in an 179 * extended partition will start one track in. If an extended partition 180 * starts at the beginning of the disk you lose 2 tracks. 181 * 182 * However non-magnetic media in particular has physical sectors that are 183 * not the same size as those reported, so has to do read modify write 184 * sequences for misaligned transfers. The alignment of partitions to 185 * cylinder boundaries makes this happen all the time. 186 * 187 * It is thus sensible to align partitions on a sensible sector boundary. 188 * For instance 1MB (2048 sectors). 189 * Common code can do this by using a geometry with 1 head and 2048 190 * sectors per track. 191 */ 192 193 /* Disks reported geometry and overall size from device driver */ 194 static unsigned int cylinders, sectors, heads; 195 static daddr_t disksectors; 196 #define cylindersectors (heads * sectors) 197 198 /* Geometry from the BIOS */ 199 static unsigned int dos_cylinders; 200 static unsigned int dos_heads; 201 static unsigned int dos_sectors; 202 static daddr_t dos_disksectors; 203 #define dos_cylindersectors (dos_heads * dos_sectors) 204 #define dos_totalsectors (dos_heads * dos_sectors * dos_cylinders) 205 206 #define DOSSECT(s,c) (((s) & 0x3f) | (((c) >> 2) & 0xc0)) 207 #define DOSCYL(c) ((c) & 0xff) 208 #define SEC_IN_1M (1024 * 1024 / 512) 209 #define SEC_TO_MB(sec) ((unsigned int)(((sec) + SEC_IN_1M / 2) / SEC_IN_1M)) 210 #define SEC_TO_CYL(sec) (((sec) + dos_cylindersectors/2) / dos_cylindersectors) 211 212 #define MAXCYL 1024 /* Usual limit is 1023 */ 213 #define MAXHEAD 256 /* Usual limit is 255 */ 214 #define MAXSECTOR 63 215 static int partition = -1; 216 217 /* Alignment of partition, and offset if first sector unusable */ 218 static unsigned int ptn_alignment; /* default dos_cylindersectors */ 219 static unsigned int ptn_0_offset; /* default dos_sectors */ 220 221 static int fd = -1, wfd = -1, *rfd = &fd; 222 static char *disk_file = NULL; 223 static char *disk_type = NULL; 224 225 static int a_flag; /* set active partition */ 226 static int i_flag; /* init bootcode */ 227 static int I_flag; /* ignore errors */ 228 static int u_flag; /* update partition data */ 229 static int v_flag; /* more verbose */ 230 static int sh_flag; /* Output data as shell defines */ 231 static int f_flag; /* force --not interactive */ 232 static int s_flag; /* set id,offset,size */ 233 static int b_flag; /* Set cyl, heads, secs (as c/h/s) */ 234 static int B_flag; /* Edit/install bootselect code */ 235 static int E_flag; /* extended partition number */ 236 static int b_cyl, b_head, b_sec; /* b_flag values. */ 237 238 #if !HAVE_NBTOOL_CONFIG_H 239 static int F_flag = 0; 240 #else 241 /* Tool - force 'file' mode to avoid unsupported functions and ioctls */ 242 static int F_flag = 1; 243 #endif 244 245 static struct gpt_hdr gpt1, gpt2; /* GUID partition tables */ 246 247 static struct mbr_sector bootcode[8192 / sizeof (struct mbr_sector)]; 248 static int bootsize; /* actual size of bootcode */ 249 static int boot_installed; /* 1 if we've copied code into the mbr */ 250 251 #if (defined(__i386__) || defined(__x86_64__)) && !HAVE_NBTOOL_CONFIG_H 252 #define USE_DISKLIST 253 static struct disklist *dl; 254 #endif 255 256 257 #define KNOWN_SYSIDS (sizeof(mbr_ptypes)/sizeof(mbr_ptypes[0])) 258 259 __dead static void usage(void); 260 static void print_s0(int); 261 static void print_part(struct mbr_sector *, int, daddr_t); 262 static void print_mbr_partition(struct mbr_sector *, int, daddr_t, daddr_t, int); 263 static void print_pbr(daddr_t, int, uint8_t); 264 static int is_all_zero(const unsigned char *, size_t); 265 static void printvis(int, const char *, const char *, size_t); 266 static int read_boot(const char *, void *, size_t, int); 267 static void init_sector0(int); 268 static void intuit_translated_geometry(void); 269 static void get_bios_geometry(void); 270 static void get_extended_ptn(void); 271 static void get_ptn_alignmemt(void); 272 #if defined(USE_DISKLIST) 273 static void get_diskname(const char *, char *, size_t); 274 #endif 275 static int change_part(int, int, int, daddr_t, daddr_t, char *); 276 static void print_geometry(void); 277 static int first_active(void); 278 static void change_active(int); 279 static void change_bios_geometry(void); 280 static void dos(int, unsigned char *, unsigned char *, unsigned char *); 281 static int open_disk(int); 282 static int read_disk(daddr_t, void *); 283 static int write_disk(daddr_t, void *); 284 static int get_params(void); 285 static int read_s0(daddr_t, struct mbr_sector *); 286 static int write_mbr(void); 287 static int read_gpt(daddr_t, struct gpt_hdr *); 288 static int delete_gpt(struct gpt_hdr *); 289 static int yesno(const char *, ...); 290 static int64_t decimal(const char *, int64_t, int, int64_t, int64_t); 291 #define DEC_SEC 1 /* asking for a sector number */ 292 #define DEC_RND 2 /* round to end of first track */ 293 #define DEC_RND_0 4 /* convert 0 to size of a track */ 294 #define DEC_RND_DOWN 8 /* subtract 1 track */ 295 #define DEC_RND_DOWN_2 16 /* subtract 2 tracks */ 296 static int ptn_id(const char *, int *); 297 static int type_match(const void *, const void *); 298 static const char *get_type(int); 299 static int get_mapping(int, unsigned int *, unsigned int *, unsigned int *, unsigned long *); 300 #ifdef BOOTSEL 301 static daddr_t configure_bootsel(daddr_t); 302 static void install_bootsel(int); 303 static daddr_t get_default_boot(void); 304 static void set_default_boot(daddr_t); 305 static void string(const char *, int, char *); 306 #endif 307 308 static void 309 initvar_disk(const char **diskp) 310 { 311 #if !HAVE_NBTOOL_CONFIG_H 312 int mib[2]; 313 size_t len; 314 char *root_device; 315 316 mib[0] = CTL_KERN; 317 mib[1] = KERN_ROOT_DEVICE; 318 if (sysctl(mib, 2, NULL, &len, NULL, 0) == -1 || 319 (root_device = malloc(len)) == NULL || 320 sysctl(mib, 2, root_device, &len, NULL, 0) == -1) 321 return; 322 323 *diskp = root_device; 324 #endif /* HAVE_NBTOOL_CONFIG_H */ 325 } 326 327 int 328 main(int argc, char *argv[]) 329 { 330 struct stat sb; 331 int ch; 332 size_t len; 333 char *cp; 334 int n; 335 #ifdef BOOTSEL 336 daddr_t default_ptn; /* start sector of default ptn */ 337 char *cbootmenu = 0; 338 #endif 339 340 int csysid; /* For the s_flag. */ 341 unsigned int cstart, csize; 342 a_flag = u_flag = sh_flag = f_flag = s_flag = b_flag = 0; 343 i_flag = B_flag = 0; 344 v_flag = 0; 345 E_flag = 0; 346 csysid = cstart = csize = 0; 347 while ((ch = getopt(argc, argv, OPTIONS)) != -1) { 348 switch (ch) { 349 case '0': 350 partition = 0; 351 break; 352 case '1': 353 partition = 1; 354 break; 355 case '2': 356 partition = 2; 357 break; 358 case '3': 359 partition = 3; 360 break; 361 case 'E': /* Extended partition number */ 362 E_flag = 1; 363 partition = strtoul(optarg, &cp, 0); 364 if (*cp || partition < 0) 365 errx(1, "Bad partition number -E %s.", optarg); 366 break; 367 #ifdef BOOTSEL 368 case 'B': /* Bootselect parameters */ 369 B_flag = 1; 370 break; 371 #endif 372 case 'F': /* device argument is really a file */ 373 F_flag = 1; 374 break; 375 case 'S': /* Output as shell variables */ 376 sh_flag = 1; 377 break; 378 case 'a': /* Set active partition */ 379 a_flag = 1; 380 break; 381 case 'f': /* Non interactive */ 382 f_flag = 1; 383 break; 384 case 'i': /* Always update bootcode */ 385 i_flag = 1; 386 break; 387 case 'I': /* Ignore errors */ 388 I_flag = 1; 389 break; 390 case 'l': /* List known partition types */ 391 for (len = 0; len < KNOWN_SYSIDS; len++) 392 printf("%03d %s\n", mbr_ptypes[len].id, 393 mbr_ptypes[len].name); 394 return 0; 395 case 'u': /* Update partition details */ 396 u_flag = 1; 397 break; 398 case 'v': /* Be verbose */ 399 v_flag++; 400 break; 401 case 's': /* Partition details */ 402 s_flag = 1; 403 if (sscanf(optarg, "%d/%u/%u%n", &csysid, &cstart, 404 &csize, &n) == 3) { 405 if (optarg[n] == 0) 406 break; 407 #ifdef BOOTSEL 408 if (optarg[n] == '/') { 409 cbootmenu = optarg + n + 1; 410 break; 411 } 412 #endif 413 } 414 errx(1, "Bad argument to the -s flag."); 415 break; 416 case 'b': /* BIOS geometry */ 417 b_flag = 1; 418 if (sscanf(optarg, "%d/%d/%d%n", &b_cyl, &b_head, 419 &b_sec, &n) != 3 || optarg[n] != 0) 420 errx(1, "Bad argument to the -b flag."); 421 if (b_cyl > MAXCYL) 422 b_cyl = MAXCYL; 423 break; 424 case 'A': /* Partition alignment[/offset] */ 425 if (sscanf(optarg, "%u%n/%u%n", &ptn_alignment, 426 &n, &ptn_0_offset, &n) < 1 427 || optarg[n] != 0 428 || ptn_0_offset > ptn_alignment) 429 errx(1, "Bad argument to the -A flag."); 430 if (ptn_0_offset == 0) 431 ptn_0_offset = ptn_alignment; 432 break; 433 case 'c': /* file/directory containing boot code */ 434 if (strchr(optarg, '/') != NULL && 435 stat(optarg, &sb) == 0 && 436 (sb.st_mode & S_IFMT) == S_IFDIR) { 437 boot_dir = optarg; 438 break; 439 } 440 bootsize = read_boot(optarg, bootcode, 441 sizeof bootcode, 1); 442 i_flag = 1; 443 break; 444 case 'r': /* read data from disk_file (not raw disk) */ 445 rfd = &wfd; 446 /* FALLTHROUGH */ 447 case 'w': /* write data to disk_file */ 448 disk_file = optarg; 449 break; 450 case 't': 451 if (setdisktab(optarg) == -1) 452 errx(EXIT_FAILURE, "bad disktab"); 453 break; 454 case 'T': 455 disk_type = optarg; 456 break; 457 default: 458 usage(); 459 } 460 } 461 argc -= optind; 462 argv += optind; 463 464 if (disk_type != NULL && getdiskbyname(disk_type) == NULL) 465 errx(EXIT_FAILURE, "bad disktype"); 466 467 if (sh_flag && (a_flag || i_flag || u_flag || f_flag || s_flag)) 468 usage(); 469 470 if (B_flag && f_flag) { 471 warnx("Bootselector may only be configured interactively"); 472 usage(); 473 } 474 475 if (f_flag && u_flag && !s_flag) { 476 warnx("Partition data not specified"); 477 usage(); 478 } 479 480 if (s_flag && partition == -1) { 481 warnx("-s flag requires a partition selected."); 482 usage(); 483 } 484 485 if (argc > 1) 486 usage(); 487 488 if (argc > 0) 489 disk = argv[0]; 490 else if (!F_flag) { 491 /* Default to boot device */ 492 initvar_disk(&disk); 493 } 494 495 if (!F_flag && stat(disk, &sb) == 0 && S_ISREG(sb.st_mode)) 496 F_flag = 1; 497 498 if (open_disk(B_flag || a_flag || i_flag || u_flag) < 0) 499 exit(1); 500 501 if (read_s0(0, &mboot)) 502 /* must have been a blank disk */ 503 init_sector0(1); 504 505 read_gpt(GPT_HDR_BLKNO, &gpt1); 506 read_gpt(disksectors - 1, &gpt2); 507 508 if (b_flag) { 509 dos_cylinders = b_cyl; 510 dos_heads = b_head; 511 dos_sectors = b_sec; 512 } else { 513 get_bios_geometry(); 514 } 515 516 if (ptn_alignment == 0) 517 get_ptn_alignmemt(); 518 519 get_extended_ptn(); 520 521 #ifdef BOOTSEL 522 default_ptn = get_default_boot(); 523 #endif 524 525 if (E_flag && !u_flag && partition >= ext.num_ptn) 526 errx(1, "Extended partition %d is not defined.", partition); 527 528 /* Do the update stuff! */ 529 if (u_flag) { 530 if (!f_flag && !b_flag) 531 change_bios_geometry(); 532 533 if (s_flag) 534 change_part(E_flag, partition, csysid, cstart, csize, 535 cbootmenu); 536 else { 537 int part = partition, chg_ext = E_flag, prompt = 1; 538 do { 539 if (prompt) { 540 printf("\n"); 541 print_s0(partition); 542 } 543 if (partition == -1) 544 part = ptn_id( 545 "Which partition do you want to change?", 546 &chg_ext); 547 if (part < 0) 548 break; 549 prompt = change_part(chg_ext, part, 0, 0, 0, 0); 550 } while (partition == -1); 551 } 552 } else { 553 if (!i_flag && !B_flag) { 554 print_geometry(); 555 print_s0(partition); 556 } 557 } 558 559 if (a_flag && !E_flag) 560 change_active(partition); 561 562 #ifdef BOOTSEL 563 if (B_flag || u_flag || i_flag) 564 /* Ensure the mbr code supports this configuration */ 565 install_bootsel(0); 566 if (B_flag) 567 default_ptn = configure_bootsel(default_ptn); 568 set_default_boot(default_ptn); 569 #else 570 if (i_flag) 571 init_sector0(0); 572 #endif 573 574 if (u_flag || a_flag || i_flag || B_flag) { 575 if (!f_flag) { 576 printf("\nWe haven't written the MBR back to disk " 577 "yet. This is your last chance.\n"); 578 if (u_flag) 579 print_s0(-1); 580 if (gpt1.hdr_size != 0 || gpt2.hdr_size != 0) 581 printf("\nWARNING: The disk is carrying " 582 "GUID Partition Tables.\n" 583 " If you continue, " 584 "GPT headers will be deleted.\n\n"); 585 if (yesno("Should we write new partition table?")) { 586 delete_gpt(&gpt1); 587 delete_gpt(&gpt2); 588 write_mbr(); 589 } 590 } else { 591 if (delete_gpt(&gpt1) > 0) 592 warnx("Primary GPT header was deleted"); 593 if (delete_gpt(&gpt2) > 0) 594 warnx("Secondary GPT header was deleted"); 595 write_mbr(); 596 } 597 } 598 599 exit(0); 600 } 601 602 static void 603 usage(void) 604 { 605 int indent = 7 + (int)strlen(getprogname()) + 1; 606 607 (void)fprintf(stderr, "usage: %s [-afiluvBS] " 608 "[-A ptn_alignment[/ptn_0_offset]] \\\n" 609 "%*s[-b cylinders/heads/sectors] \\\n" 610 "%*s[-0123 | -E num " 611 "[-s id/start/size[/bootmenu]]] \\\n" 612 "%*s[-t disktab] [-T disktype] \\\n" 613 "%*s[-c bootcode] " 614 "[-r|-w file] [device]\n" 615 "\t-a change active partition\n" 616 "\t-f force - not interactive\n" 617 "\t-i initialise MBR code\n" 618 "\t-l list partition types\n" 619 "\t-u update partition data\n" 620 "\t-v verbose output, -v -v more verbose still\n" 621 "\t-B update bootselect options\n" 622 "\t-F treat device as a regular file\n" 623 "\t-S output as shell defines\n" 624 "\t-r and -w access 'file' for non-destructive testing\n", 625 getprogname(), indent, "", indent, "", indent, "", indent, ""); 626 exit(1); 627 } 628 629 static daddr_t 630 ext_offset(int part) 631 { 632 daddr_t offset = ext.base; 633 634 if (part != 0) 635 offset += le32toh(ext.ptn[part - 1].mbr_parts[1].mbrp_start); 636 return offset; 637 } 638 639 static void 640 print_s0(int which) 641 { 642 int part; 643 644 if (which == -1) { 645 if (!sh_flag) 646 printf("Partition table:\n"); 647 for (part = 0; part < MBR_PART_COUNT; part++) { 648 if (!sh_flag) 649 printf("%d: ", part); 650 print_part(&mboot, part, 0); 651 } 652 if (!sh_flag) { 653 if (ext.is_corrupt) 654 printf("Extended partition table is corrupt\n"); 655 else 656 if (ext.num_ptn != 0) 657 printf("Extended partition table:\n"); 658 } 659 for (part = 0; part < ext.num_ptn; part++) { 660 if (!sh_flag) 661 printf("E%d: ", part); 662 print_part(&ext.ptn[part], 0, ext_offset(part)); 663 if (!sh_flag && v_flag >= 2) { 664 printf("link: "); 665 print_mbr_partition(&ext.ptn[part], 1, 666 ext_offset(part), ext.base, 0); 667 } 668 } 669 #ifdef BOOTSEL 670 if (!sh_flag && mboot.mbr_bootsel_magic == LE_MBR_BS_MAGIC) { 671 int tmo; 672 673 printf("Bootselector "); 674 if (mboot.mbr_bootsel.mbrbs_flags & MBR_BS_ACTIVE) { 675 printf("enabled"); 676 tmo = le16toh(mboot.mbr_bootsel.mbrbs_timeo); 677 if (tmo == 0xffff) 678 printf(", infinite timeout"); 679 else 680 printf(", timeout %d seconds", 681 (10 * tmo + 9) / 182); 682 } else 683 printf("disabled"); 684 printf(".\n"); 685 } 686 #endif 687 if (!sh_flag) { 688 int active = first_active(); 689 if (active == MBR_PART_COUNT) 690 printf("No active partition.\n"); 691 else 692 printf("First active partition: %d\n", active); 693 } 694 if (!sh_flag && mboot.mbr_dsn != 0) 695 printf("Drive serial number: %"PRIu32" (0x%08x)\n", 696 le32toh(mboot.mbr_dsn), 697 le32toh(mboot.mbr_dsn)); 698 return; 699 } 700 701 if (E_flag) { 702 if (!sh_flag) 703 printf("Extended partition E%d:\n", which); 704 if (which > ext.num_ptn) 705 printf("Undefined\n"); 706 else 707 print_part(&ext.ptn[which], 0, ext_offset(which)); 708 } else { 709 if (!sh_flag) 710 printf("Partition %d:\n", which); 711 print_part(&mboot, which, 0); 712 } 713 } 714 715 static void 716 print_part(struct mbr_sector *boot, int part, daddr_t offset) 717 { 718 struct mbr_partition *partp; 719 const char *e; 720 721 if (!sh_flag) { 722 print_mbr_partition(boot, part, offset, 0, 0); 723 return; 724 } 725 726 partp = &boot->mbr_parts[part]; 727 if (boot != &mboot) { 728 part = boot - ext.ptn; 729 e = "E"; 730 } else 731 e = ""; 732 733 if (partp->mbrp_type == 0) { 734 printf("PART%s%dSIZE=0\n", e, part); 735 return; 736 } 737 738 printf("PART%s%dID=%d\n", e, part, partp->mbrp_type); 739 printf("PART%s%dSIZE=%u\n", e, part, le32toh(partp->mbrp_size)); 740 printf("PART%s%dSTART=%"PRIdaddr"\n", e, part, 741 offset + le32toh(partp->mbrp_start)); 742 printf("PART%s%dFLAG=0x%x\n", e, part, partp->mbrp_flag); 743 printf("PART%s%dBCYL=%d\n", e, part, 744 MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect)); 745 printf("PART%s%dBHEAD=%d\n", e, part, partp->mbrp_shd); 746 printf("PART%s%dBSEC=%d\n", e, part, MBR_PSECT(partp->mbrp_ssect)); 747 printf("PART%s%dECYL=%d\n", e, part, 748 MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect)); 749 printf("PART%s%dEHEAD=%d\n", e, part, partp->mbrp_ehd); 750 printf("PART%s%dESEC=%d\n", e, part, MBR_PSECT(partp->mbrp_esect)); 751 } 752 753 static void 754 pr_cyls(daddr_t sector, int is_end) 755 { 756 unsigned long cyl, head, sect; 757 cyl = sector / dos_cylindersectors; 758 sect = sector - cyl * dos_cylindersectors; 759 head = sect / dos_sectors; 760 sect -= head * dos_sectors; 761 762 printf("%lu", cyl); 763 764 if (is_end) { 765 if (head == dos_heads - 1 && sect == dos_sectors - 1) 766 return; 767 } else { 768 if (head == 0 && sect == 0) 769 return; 770 } 771 772 printf("/%lu/%lu", head, sect + 1); 773 } 774 775 static void 776 print_mbr_partition(struct mbr_sector *boot, int part, 777 daddr_t offset, daddr_t exoffset, int indent) 778 { 779 daddr_t start; 780 daddr_t size; 781 struct mbr_partition *partp = &boot->mbr_parts[part]; 782 struct mbr_sector eboot; 783 int p; 784 static int dumped = 0; 785 786 if (partp->mbrp_type == 0 && v_flag < 2) { 787 printf("<UNUSED>\n"); 788 return; 789 } 790 791 start = le32toh(partp->mbrp_start); 792 size = le32toh(partp->mbrp_size); 793 if (MBR_IS_EXTENDED(partp->mbrp_type)) 794 start += exoffset; 795 else 796 start += offset; 797 798 printf("%s (sysid %d)\n", get_type(partp->mbrp_type), partp->mbrp_type); 799 #ifdef BOOTSEL 800 if (boot->mbr_bootsel_magic == LE_MBR_BS_MAGIC && 801 boot->mbr_bootsel.mbrbs_nametab[part][0]) 802 printf("%*s bootmenu: %s\n", indent, "", 803 boot->mbr_bootsel.mbrbs_nametab[part]); 804 #endif 805 806 printf("%*s start %"PRIdaddr", size %"PRIdaddr, 807 indent, "", start, size); 808 if (size != 0) { 809 printf(" (%u MB, Cyls ", SEC_TO_MB(size)); 810 if (v_flag == 0 && le32toh(partp->mbrp_start) == ptn_0_offset) 811 pr_cyls(start - ptn_0_offset, 0); 812 else 813 pr_cyls(start, 0); 814 printf("-"); 815 pr_cyls(start + size - 1, 1); 816 printf(")"); 817 } 818 819 switch (partp->mbrp_flag) { 820 case 0: 821 break; 822 case MBR_PFLAG_ACTIVE: 823 printf(", Active"); 824 break; 825 default: 826 printf(", flag 0x%x", partp->mbrp_flag); 827 break; 828 } 829 printf("\n"); 830 831 if (v_flag) { 832 printf("%*s beg: cylinder %4d, head %3d, sector %2d\n", 833 indent, "", 834 MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect), 835 partp->mbrp_shd, MBR_PSECT(partp->mbrp_ssect)); 836 printf("%*s end: cylinder %4d, head %3d, sector %2d\n", 837 indent, "", 838 MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect), 839 partp->mbrp_ehd, MBR_PSECT(partp->mbrp_esect)); 840 } 841 842 if (partp->mbrp_type == 0 && start == 0 && v_flag < 3) 843 return; 844 845 if (! MBR_IS_EXTENDED(partp->mbrp_type)) 846 print_pbr(start, indent + 8, partp->mbrp_type); 847 848 if (!MBR_IS_EXTENDED(partp->mbrp_type) || 849 (v_flag <= 2 && !ext.is_corrupt)) 850 return; 851 852 /* 853 * Recursive dump extended table, 854 * This is read from the disk - so is wrong during editing. 855 * Just ensure we only show it once. 856 */ 857 if (dumped) 858 return; 859 860 printf("%*s Extended partition table:\n", indent, ""); 861 indent += 4; 862 if (read_s0(start, &eboot) == -1) 863 return; 864 for (p = 0; p < MBR_PART_COUNT; p++) { 865 printf("%*s%d: ", indent, "", p); 866 print_mbr_partition(&eboot, p, start, 867 exoffset ? exoffset : start, indent); 868 } 869 870 if (exoffset == 0) 871 dumped = 1; 872 } 873 874 /* Print a line with a label and a vis-encoded string */ 875 static void 876 printvis(int indent, const char *label, const char *buf, size_t size) 877 { 878 char *visbuf; 879 880 if ((visbuf = malloc(size * 4 + 1)) == NULL) 881 err(1, "Malloc failed"); 882 strsvisx(visbuf, buf, size, VIS_TAB|VIS_NL|VIS_OCTAL, "\""); 883 printf("%*s%s: \"%s\"\n", 884 indent, "", 885 label, visbuf); 886 free(visbuf); 887 } 888 889 /* Check whether a buffer contains all bytes zero */ 890 static int 891 is_all_zero(const unsigned char *p, size_t size) 892 { 893 894 while (size-- > 0) { 895 if (*p++ != 0) 896 return 0; 897 } 898 return 1; 899 } 900 901 /* 902 * Report on the contents of a PBR sector. 903 * 904 * We first perform several sanity checks. If vflag >= 2, we report all 905 * failing tests, but for smaller values of v_flag we stop after the 906 * first failing test. Tests are ordered in an attempt to get the most 907 * useful error message from the first failing test. 908 * 909 * If v_flag >= 2, we also report some decoded values from the PBR. 910 * These results may be meaningless, if the PBR doesn't follow common 911 * conventions. 912 * 913 * Trying to decode anything more than the magic number in the last 914 * two bytes is a layering violation, but it can be very useful in 915 * diagnosing boot failures. 916 */ 917 static void 918 print_pbr(daddr_t sector, int indent, uint8_t part_type) 919 { 920 struct mbr_sector pboot; 921 unsigned char *p, *endp; 922 unsigned char val; 923 int ok; 924 int errcount = 0; 925 926 #define PBR_ERROR(...) \ 927 do { \ 928 ++errcount; \ 929 printf("%*s%s: ", indent, "", \ 930 (v_flag < 2 ? "PBR is not bootable" : "Not bootable")); \ 931 printf(__VA_ARGS__); \ 932 if (v_flag < 2) \ 933 return; \ 934 } while (/*CONSTCOND*/ 0) 935 936 if (v_flag >= 2) { 937 printf("%*sInformation from PBR:\n", 938 indent, ""); 939 indent += 4; 940 } 941 942 if (read_disk(sector, &pboot) == -1) { 943 PBR_ERROR("Sector %"PRIdaddr" is unreadable (%s)\n", 944 sector, strerror(errno)); 945 return; 946 } 947 948 /* all bytes identical? */ 949 p = (unsigned char *)&pboot; 950 endp = p + sizeof(pboot); 951 val = *p; 952 ok = 0; 953 for (; p < endp; p++) { 954 if (*p != val) { 955 ok = 1; 956 break; 957 } 958 } 959 if (! ok) 960 PBR_ERROR("All bytes are identical (0x%02x)\n", val); 961 962 if (pboot.mbr_magic != LE_MBR_MAGIC) 963 PBR_ERROR("Bad magic number (0x%04x)\n", 964 le16toh(pboot.mbr_magic)); 965 966 #if 0 967 /* Some i386 OS might fail this test. All non-i386 will fail. */ 968 if (pboot.mbr_jmpboot[0] != 0xE9 969 && pboot.mbr_jmpboot[0] != 0xEB) { 970 PBR_ERROR("Does not begin with i386 JMP instruction" 971 " (0x%02x 0x%02x0 0x%02x)\n", 972 pboot.mbr_jmpboot[0], pboot.mbr_jmpboot[1], 973 pboot.mbr_jmpboot[2]); 974 } 975 #endif 976 977 if (v_flag > 0 && errcount == 0) 978 printf("%*sPBR appears to be bootable\n", 979 indent, ""); 980 if (v_flag < 2) 981 return; 982 983 if (! is_all_zero(pboot.mbr_oemname, sizeof(pboot.mbr_oemname))) { 984 printvis(indent, "OEM name", (char *)pboot.mbr_oemname, 985 sizeof(pboot.mbr_oemname)); 986 } 987 988 if (pboot.mbr_bpb.bpb16.bsBootSig == 0x29) 989 printf("%*sBPB FAT16 boot signature found\n", 990 indent, ""); 991 if (pboot.mbr_bpb.bpb32.bsBootSig == 0x29) 992 printf("%*sBPB FAT32 boot signature found\n", 993 indent, ""); 994 995 #undef PBR_ERROR 996 } 997 998 static int 999 read_boot(const char *name, void *buf, size_t len, int err_exit) 1000 { 1001 int bfd, ret; 1002 struct stat st; 1003 1004 if (boot_path != NULL) 1005 free(boot_path); 1006 if (strchr(name, '/') == 0) 1007 asprintf(&boot_path, "%s/%s", boot_dir, name); 1008 else 1009 boot_path = strdup(name); 1010 if (boot_path == NULL) 1011 err(1, "Malloc failed"); 1012 1013 if ((bfd = open(boot_path, O_RDONLY)) < 0 || fstat(bfd, &st) == -1) { 1014 warn("%s", boot_path); 1015 goto fail; 1016 } 1017 1018 if (st.st_size > (off_t)len) { 1019 warnx("%s: bootcode too large", boot_path); 1020 goto fail; 1021 } 1022 ret = st.st_size; 1023 if (ret < 0x200) { 1024 warnx("%s: bootcode too small", boot_path); 1025 goto fail; 1026 } 1027 if (read(bfd, buf, len) != ret) { 1028 warn("%s", boot_path); 1029 goto fail; 1030 } 1031 1032 /* 1033 * Do some sanity checking here 1034 */ 1035 if (((struct mbr_sector *)buf)->mbr_magic != LE_MBR_MAGIC) { 1036 warnx("%s: invalid magic", boot_path); 1037 goto fail; 1038 } 1039 1040 close(bfd); 1041 ret = (ret + 0x1ff) & ~0x1ff; 1042 return ret; 1043 1044 fail: 1045 if (bfd >= 0) 1046 close(bfd); 1047 if (err_exit) 1048 exit(1); 1049 return 0; 1050 } 1051 1052 static void 1053 init_sector0(int zappart) 1054 { 1055 int i; 1056 int copy_size = offsetof(struct mbr_sector, mbr_dsn); 1057 1058 #ifdef DEFAULT_BOOTCODE 1059 if (bootsize == 0) 1060 bootsize = read_boot(DEFAULT_BOOTCODE, bootcode, 1061 sizeof bootcode, 0); 1062 #endif 1063 #ifdef BOOTSEL 1064 if (mboot.mbr_bootsel_magic == LE_MBR_BS_MAGIC 1065 && bootcode[0].mbr_bootsel_magic == LE_MBR_BS_MAGIC) 1066 copy_size = MBR_BS_OFFSET; 1067 #endif 1068 1069 if (bootsize != 0) { 1070 boot_installed = 1; 1071 memcpy(&mboot, bootcode, copy_size); 1072 mboot.mbr_bootsel_magic = bootcode[0].mbr_bootsel_magic; 1073 } 1074 mboot.mbr_magic = LE_MBR_MAGIC; 1075 1076 if (!zappart) 1077 return; 1078 for (i = 0; i < MBR_PART_COUNT; i++) 1079 memset(&mboot.mbr_parts[i], 0, sizeof(mboot.mbr_parts[i])); 1080 } 1081 1082 static void 1083 get_extended_ptn(void) 1084 { 1085 struct mbr_partition *mp; 1086 struct mbr_sector *boot; 1087 daddr_t offset; 1088 struct mbr_sector *nptn; 1089 1090 /* find first (there should only be one) extended partition */ 1091 for (mp = mboot.mbr_parts; !MBR_IS_EXTENDED(mp->mbrp_type); mp++) 1092 if (mp >= &mboot.mbr_parts[MBR_PART_COUNT]) 1093 return; 1094 1095 /* 1096 * The extended partition should be structured as a linked list 1097 * (even though it appears, at first glance, to be a tree). 1098 */ 1099 ext.base = le32toh(mp->mbrp_start); 1100 ext.limit = ext.base + le32toh(mp->mbrp_size); 1101 ext.ptn_id = mp - mboot.mbr_parts; 1102 for (offset = 0;; offset = le32toh(boot->mbr_parts[1].mbrp_start)) { 1103 nptn = realloc(ext.ptn, (ext.num_ptn + 1) * sizeof *ext.ptn); 1104 if (nptn == NULL) 1105 err(1, "Malloc failed"); 1106 ext.ptn = nptn; 1107 boot = ext.ptn + ext.num_ptn; 1108 if (read_s0(offset + ext.base, boot) == -1) 1109 break; 1110 /* expect p0 to be valid and p1 to be another extended ptn */ 1111 if (MBR_IS_EXTENDED(boot->mbr_parts[0].mbrp_type)) 1112 break; 1113 if (boot->mbr_parts[1].mbrp_type != 0 && 1114 !MBR_IS_EXTENDED(boot->mbr_parts[1].mbrp_type)) 1115 break; 1116 /* p2 and p3 should be unallocated */ 1117 if (boot->mbr_parts[2].mbrp_type != 0 || 1118 boot->mbr_parts[3].mbrp_type != 0) 1119 break; 1120 /* data ptn inside extended one */ 1121 if (boot->mbr_parts[0].mbrp_type != 0 && 1122 offset + le32toh(boot->mbr_parts[0].mbrp_start) 1123 + le32toh(boot->mbr_parts[0].mbrp_size) > ext.limit) 1124 break; 1125 1126 ext.num_ptn++; 1127 1128 if (boot->mbr_parts[1].mbrp_type == 0) 1129 /* end of extended partition chain */ 1130 return; 1131 /* must be in sector order */ 1132 if (offset >= le32toh(boot->mbr_parts[1].mbrp_start)) 1133 break; 1134 } 1135 1136 warnx("Extended partition table is corrupt\n"); 1137 ext.is_corrupt = 1; 1138 ext.num_ptn = 0; 1139 } 1140 1141 #if defined(USE_DISKLIST) 1142 static void 1143 get_diskname(const char *fullname, char *diskname, size_t size) 1144 { 1145 const char *p, *p2; 1146 size_t len; 1147 1148 p = strrchr(fullname, '/'); 1149 if (p == NULL) 1150 p = fullname; 1151 else 1152 p++; 1153 1154 if (*p == 0) { 1155 strlcpy(diskname, fullname, size); 1156 return; 1157 } 1158 1159 if (*p == 'r') 1160 p++; 1161 1162 for (p2 = p; *p2 != 0; p2++) 1163 if (isdigit((unsigned char)*p2)) 1164 break; 1165 if (*p2 == 0) { 1166 /* XXX invalid diskname? */ 1167 strlcpy(diskname, fullname, size); 1168 return; 1169 } 1170 while (isdigit((unsigned char)*p2)) 1171 p2++; 1172 1173 len = p2 - p; 1174 if (len > size) { 1175 /* XXX */ 1176 strlcpy(diskname, fullname, size); 1177 return; 1178 } 1179 1180 memcpy(diskname, p, len); 1181 diskname[len] = 0; 1182 } 1183 #endif 1184 1185 static void 1186 get_ptn_alignmemt(void) 1187 { 1188 struct mbr_partition *partp = &mboot.mbr_parts[0]; 1189 uint32_t ptn_0_base, ptn_0_limit; 1190 1191 /* Default to using 'traditional' cylinder alignment */ 1192 ptn_alignment = dos_cylindersectors; 1193 ptn_0_offset = dos_sectors; 1194 1195 if (partp->mbrp_type != 0) { 1196 /* Try to copy alignment of first partition */ 1197 ptn_0_base = le32toh(partp->mbrp_start); 1198 ptn_0_limit = ptn_0_base + le32toh(partp->mbrp_size); 1199 if (!(ptn_0_limit & 2047)) { 1200 /* Partition ends on a 1MB boundary, align to 1MB */ 1201 ptn_alignment = 2048; 1202 if (ptn_0_base <= 2048 1203 && !(ptn_0_base & (ptn_0_base - 1))) { 1204 /* ptn_base is a power of 2, use it */ 1205 ptn_0_offset = ptn_0_base; 1206 } 1207 } 1208 } else { 1209 /* Use 1MB alignment for large disks */ 1210 if (disksectors > 2048 * 1024 * 128) { 1211 ptn_alignment = 2048; 1212 ptn_0_offset = 2048; 1213 } 1214 } 1215 } 1216 1217 static void 1218 get_bios_geometry(void) 1219 { 1220 #if defined(USE_DISKLIST) 1221 int mib[2], i; 1222 size_t len; 1223 struct biosdisk_info *bip; 1224 struct nativedisk_info *nip; 1225 char diskname[8]; 1226 1227 mib[0] = CTL_MACHDEP; 1228 mib[1] = CPU_DISKINFO; 1229 if (sysctl(mib, 2, NULL, &len, NULL, 0) < 0) { 1230 goto out; 1231 } 1232 dl = (struct disklist *) malloc(len); 1233 if (dl == NULL) 1234 err(1, "Malloc failed"); 1235 if (sysctl(mib, 2, dl, &len, NULL, 0) < 0) { 1236 free(dl); 1237 dl = 0; 1238 goto out; 1239 } 1240 1241 get_diskname(disk, diskname, sizeof diskname); 1242 1243 for (i = 0; i < dl->dl_nnativedisks; i++) { 1244 nip = &dl->dl_nativedisks[i]; 1245 if (strcmp(diskname, nip->ni_devname)) 1246 continue; 1247 /* 1248 * XXX listing possible matches is better. This is ok for 1249 * now because the user has a chance to change it later. 1250 * Also, if all the disks have the same parameters then we can 1251 * just use them, we don't need to know which disk is which. 1252 */ 1253 if (nip->ni_nmatches != 0) { 1254 bip = &dl->dl_biosdisks[nip->ni_biosmatches[0]]; 1255 dos_cylinders = bip->bi_cyl; 1256 dos_heads = bip->bi_head; 1257 dos_sectors = bip->bi_sec; 1258 if (bip->bi_lbasecs) 1259 dos_disksectors = bip->bi_lbasecs; 1260 return; 1261 } 1262 } 1263 out: 1264 #endif 1265 /* Allright, allright, make a stupid guess.. */ 1266 intuit_translated_geometry(); 1267 } 1268 1269 #ifdef BOOTSEL 1270 static daddr_t 1271 get_default_boot(void) 1272 { 1273 unsigned int id; 1274 int p; 1275 1276 if (mboot.mbr_bootsel_magic != LE_MBR_BS_MAGIC) 1277 /* default to first active partition */ 1278 return DEFAULT_ACTIVE; 1279 1280 id = mboot.mbr_bootsel.mbrbs_defkey; 1281 1282 if (mboot.mbr_bootsel.mbrbs_flags & MBR_BS_ASCII) { 1283 /* Keycode is ascii */ 1284 if (id == '\r') 1285 return DEFAULT_ACTIVE; 1286 /* '1'+ => allocated partition id, 'a'+ => disk 0+ */ 1287 if (id >= 'a' && id < 'a' + MAX_BIOS_DISKS) 1288 return DEFAULT_DISK(id - 'a'); 1289 id -= '1'; 1290 } else { 1291 /* keycode is PS/2 keycode */ 1292 if (id == SCAN_ENTER) 1293 return DEFAULT_ACTIVE; 1294 /* 1+ => allocated partition id, F1+ => disk 0+ */ 1295 if (id >= SCAN_F1 && id < SCAN_F1 + MAX_BIOS_DISKS) 1296 return DEFAULT_DISK(id - SCAN_F1); 1297 id -= SCAN_1; 1298 } 1299 1300 /* Convert partition index to the invariant start sector number */ 1301 1302 for (p = 0; p < MBR_PART_COUNT; p++) { 1303 if (mboot.mbr_parts[p].mbrp_type == 0) 1304 continue; 1305 if (mboot.mbr_bootsel.mbrbs_nametab[p][0] == 0) 1306 continue; 1307 if (id-- == 0) 1308 return le32toh(mboot.mbr_parts[p].mbrp_start); 1309 } 1310 1311 for (p = 0; p < ext.num_ptn; p++) { 1312 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1313 continue; 1314 if (ext.ptn[p].mbr_bootsel.mbrbs_nametab[0][0] == 0) 1315 continue; 1316 if (id-- == 0) 1317 return ext_offset(p) 1318 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start); 1319 } 1320 1321 return DEFAULT_ACTIVE; 1322 } 1323 1324 static void 1325 set_default_boot(daddr_t default_ptn) 1326 { 1327 int p; 1328 static const unsigned char key_list[] = { SCAN_ENTER, SCAN_F1, SCAN_1, 1329 '\r', 'a', '1' }; 1330 const unsigned char *key = key_list; 1331 1332 if (mboot.mbr_bootsel_magic != LE_MBR_BS_MAGIC) 1333 /* sanity */ 1334 return; 1335 1336 if (mboot.mbr_bootsel.mbrbs_flags & MBR_BS_ASCII) 1337 /* Use ascii values */ 1338 key += 3; 1339 1340 if (default_ptn == DEFAULT_ACTIVE) { 1341 mboot.mbr_bootsel.mbrbs_defkey = key[0]; 1342 return; 1343 } 1344 1345 if (default_ptn >= DEFAULT_DISK(0) 1346 && default_ptn < DEFAULT_DISK(MAX_BIOS_DISKS)) { 1347 mboot.mbr_bootsel.mbrbs_defkey = key[1] 1348 + default_ptn - DEFAULT_DISK(0); 1349 return; 1350 } 1351 1352 mboot.mbr_bootsel.mbrbs_defkey = key[2]; 1353 for (p = 0; p < MBR_PART_COUNT; p++) { 1354 if (mboot.mbr_parts[p].mbrp_type == 0) 1355 continue; 1356 if (mboot.mbr_bootsel.mbrbs_nametab[p][0] == 0) 1357 continue; 1358 if (le32toh(mboot.mbr_parts[p].mbrp_start) == default_ptn) 1359 return; 1360 mboot.mbr_bootsel.mbrbs_defkey++; 1361 } 1362 1363 if (mboot.mbr_bootsel.mbrbs_flags & MBR_BS_EXTLBA) { 1364 for (p = 0; p < ext.num_ptn; p++) { 1365 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1366 continue; 1367 if (ext.ptn[p].mbr_bootsel.mbrbs_nametab[0][0] == 0) 1368 continue; 1369 if (le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) + 1370 ext_offset(p) == default_ptn) 1371 return; 1372 mboot.mbr_bootsel.mbrbs_defkey++; 1373 } 1374 } 1375 1376 /* Default to first active partition */ 1377 mboot.mbr_bootsel.mbrbs_defkey = key[0]; 1378 } 1379 1380 static void 1381 install_bootsel(int needed) 1382 { 1383 struct mbr_bootsel *mbs = &mboot.mbr_bootsel; 1384 int p; 1385 int ext13 = 0; 1386 const char *code; 1387 1388 needed |= MBR_BS_NEWMBR; /* need new bootsel code */ 1389 1390 /* Work out which boot code we need for this configuration */ 1391 for (p = 0; p < MBR_PART_COUNT; p++) { 1392 if (mboot.mbr_parts[p].mbrp_type == 0) 1393 continue; 1394 if (mboot.mbr_bootsel_magic != LE_MBR_BS_MAGIC) 1395 break; 1396 if (mbs->mbrbs_nametab[p][0] == 0) 1397 continue; 1398 needed |= MBR_BS_ACTIVE; 1399 if (le32toh(mboot.mbr_parts[p].mbrp_start) >= dos_totalsectors) 1400 ext13 = MBR_BS_EXTINT13; 1401 } 1402 1403 for (p = 0; p < ext.num_ptn; p++) { 1404 if (ext.ptn[p].mbr_bootsel_magic != LE_MBR_BS_MAGIC) 1405 continue; 1406 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1407 continue; 1408 if (ext.ptn[p].mbr_bootsel.mbrbs_nametab[p][0] == 0) 1409 continue; 1410 needed |= MBR_BS_EXTLBA | MBR_BS_ACTIVE; 1411 } 1412 1413 if (B_flag) 1414 needed |= MBR_BS_ACTIVE; 1415 1416 /* Is the installed code good enough ? */ 1417 if (!i_flag && (needed == 0 || 1418 (mboot.mbr_bootsel_magic == LE_MBR_BS_MAGIC 1419 && (mbs->mbrbs_flags & needed) == needed))) { 1420 /* yes - just set flags */ 1421 mbs->mbrbs_flags |= ext13; 1422 return; 1423 } 1424 1425 /* ok - we need to replace the bootcode */ 1426 1427 if (f_flag && !(i_flag || B_flag)) { 1428 warnx("Installed bootfile doesn't support required options."); 1429 return; 1430 } 1431 1432 if (!f_flag && bootsize == 0 && !i_flag) 1433 /* Output an explanation for the 'update bootcode' prompt. */ 1434 printf("\n%s\n", 1435 "Installed bootfile doesn't support required options."); 1436 1437 /* Were we told a specific file ? (which we have already read) */ 1438 /* If so check that it supports what we need. */ 1439 if (bootsize != 0 && needed != 0 1440 && (bootcode[0].mbr_bootsel_magic != LE_MBR_BS_MAGIC 1441 || ((bootcode[0].mbr_bootsel.mbrbs_flags & needed) != needed))) { 1442 /* No it doesn't... */ 1443 if (f_flag) 1444 warnx("Bootfile %s doesn't support " 1445 "required bootsel options", boot_path ); 1446 /* But install it anyway */ 1447 else 1448 if (yesno("Bootfile %s doesn't support the required " 1449 "options,\ninstall default bootfile instead?", 1450 boot_path)) 1451 bootsize = 0; 1452 } 1453 1454 if (bootsize == 0) { 1455 /* Get name of bootfile that supports the required facilities */ 1456 code = DEFAULT_BOOTCODE; 1457 if (needed & MBR_BS_ACTIVE) 1458 code = DEFAULT_BOOTSELCODE; 1459 #ifdef DEFAULT_BOOTEXTCODE 1460 if (needed & MBR_BS_EXTLBA) 1461 code = DEFAULT_BOOTEXTCODE; 1462 #endif 1463 1464 bootsize = read_boot(code, bootcode, sizeof bootcode, 0); 1465 if (bootsize == 0) 1466 /* The old bootcode is better than no bootcode at all */ 1467 return; 1468 if ((bootcode[0].mbr_bootsel.mbrbs_flags & needed) != needed) 1469 warnx("Default bootfile %s doesn't support required " 1470 "options. Got flags 0x%x, wanted 0x%x\n", 1471 boot_path, bootcode[0].mbr_bootsel.mbrbs_flags, 1472 needed); 1473 } 1474 1475 if (!f_flag && !yesno("Update the bootcode from %s?", boot_path)) 1476 return; 1477 1478 init_sector0(0); 1479 1480 if (mboot.mbr_bootsel_magic == LE_MBR_BS_MAGIC) 1481 mbs->mbrbs_flags = bootcode[0].mbr_bootsel.mbrbs_flags | ext13; 1482 } 1483 1484 static daddr_t 1485 configure_bootsel(daddr_t default_ptn) 1486 { 1487 struct mbr_bootsel *mbs = &mboot.mbr_bootsel; 1488 int i, item, opt; 1489 int tmo; 1490 daddr_t *off; 1491 int num_bios_disks; 1492 1493 #if defined(USE_DISKLIST) 1494 if (dl != NULL) { 1495 num_bios_disks = dl->dl_nbiosdisks; 1496 if (num_bios_disks > MAX_BIOS_DISKS) 1497 num_bios_disks = MAX_BIOS_DISKS; 1498 } else 1499 #endif 1500 num_bios_disks = MAX_BIOS_DISKS; 1501 1502 printf("\nBoot selector configuration:\n"); 1503 1504 /* The timeout value is in ticks, ~18.2 Hz. Avoid using floats. 1505 * Ticks are nearly 64k/3600 - so our long timers are sligtly out! 1506 * Newer bootcode always waits for 1 tick, so treats 0xffff 1507 * as wait forever. 1508 */ 1509 tmo = le16toh(mbs->mbrbs_timeo); 1510 tmo = tmo == 0xffff ? -1 : (10 * tmo + 9) / 182; 1511 tmo = decimal("Timeout value (0 to 3600 seconds, -1 => never)", 1512 tmo, 0, -1, 3600); 1513 mbs->mbrbs_timeo = htole16(tmo == -1 ? 0xffff : (tmo * 182) / 10); 1514 1515 off = calloc(1 + MBR_PART_COUNT + ext.num_ptn + num_bios_disks, sizeof *off); 1516 if (off == NULL) 1517 err(1, "Malloc failed"); 1518 1519 printf("Select the default boot option. Options are:\n\n"); 1520 item = 0; 1521 opt = 0; 1522 off[opt] = DEFAULT_ACTIVE; 1523 printf("%d: The first active partition\n", opt); 1524 for (i = 0; i < MBR_PART_COUNT; i++) { 1525 if (mboot.mbr_parts[i].mbrp_type == 0) 1526 continue; 1527 if (mbs->mbrbs_nametab[i][0] == 0) 1528 continue; 1529 printf("%d: %s\n", ++opt, &mbs->mbrbs_nametab[i][0]); 1530 off[opt] = le32toh(mboot.mbr_parts[i].mbrp_start); 1531 if (off[opt] == default_ptn) 1532 item = opt; 1533 } 1534 if (mbs->mbrbs_flags & MBR_BS_EXTLBA) { 1535 for (i = 0; i < ext.num_ptn; i++) { 1536 if (ext.ptn[i].mbr_parts[0].mbrp_type == 0) 1537 continue; 1538 if (ext.ptn[i].mbr_bootsel.mbrbs_nametab[0][0] == 0) 1539 continue; 1540 printf("%d: %s\n", 1541 ++opt, ext.ptn[i].mbr_bootsel.mbrbs_nametab[0]); 1542 off[opt] = ext_offset(i) + 1543 le32toh(ext.ptn[i].mbr_parts[0].mbrp_start); 1544 if (off[opt] == default_ptn) 1545 item = opt; 1546 } 1547 } 1548 for (i = 0; i < num_bios_disks; i++) { 1549 printf("%d: Harddisk %d\n", ++opt, i); 1550 off[opt] = DEFAULT_DISK(i); 1551 if (DEFAULT_DISK(i) == default_ptn) 1552 item = opt; 1553 } 1554 1555 item = decimal("Default boot option", item, 0, 0, opt); 1556 1557 default_ptn = off[item]; 1558 free(off); 1559 return default_ptn; 1560 } 1561 #endif /* BOOTSEL */ 1562 1563 1564 /* Prerequisite: the disklabel parameters and master boot record must 1565 * have been read (i.e. dos_* and mboot are meaningful). 1566 * Specification: modifies dos_cylinders, dos_heads, dos_sectors, and 1567 * dos_cylindersectors to be consistent with what the 1568 * partition table is using, if we can find a geometry 1569 * which is consistent with all partition table entries. 1570 * We may get the number of cylinders slightly wrong (in 1571 * the conservative direction). The idea is to be able 1572 * to create a NetBSD partition on a disk we don't know 1573 * the translated geometry of. 1574 * This routine is only used for non-x86 systems or when we fail to 1575 * get the BIOS geometry from the kernel. 1576 */ 1577 static void 1578 intuit_translated_geometry(void) 1579 { 1580 uint32_t xcylinders; 1581 int xheads = -1, xsectors = -1, i, j; 1582 unsigned int c1, h1, s1, c2, h2, s2; 1583 unsigned long a1, a2; 1584 uint64_t num, denom; 1585 1586 /* 1587 * The physical parameters may be invalid as bios geometry. 1588 * If we cannot determine the actual bios geometry, we are 1589 * better off picking a likely 'faked' geometry than leaving 1590 * the invalid physical one. 1591 */ 1592 1593 if (dos_cylinders > MAXCYL || dos_heads > MAXHEAD || 1594 dos_sectors > MAXSECTOR) { 1595 h1 = MAXHEAD - 1; 1596 c1 = MAXCYL - 1; 1597 #if defined(USE_DISKLIST) 1598 if (dl != NULL) { 1599 /* BIOS may use 256 heads or 1024 cylinders */ 1600 for (i = 0; i < dl->dl_nbiosdisks; i++) { 1601 if (h1 < (unsigned int)dl->dl_biosdisks[i].bi_head) 1602 h1 = dl->dl_biosdisks[i].bi_head; 1603 if (c1 < (unsigned int)dl->dl_biosdisks[i].bi_cyl) 1604 c1 = dl->dl_biosdisks[i].bi_cyl; 1605 } 1606 } 1607 #endif 1608 dos_sectors = MAXSECTOR; 1609 dos_heads = h1; 1610 dos_cylinders = disklabel.d_secperunit / (MAXSECTOR * h1); 1611 if (dos_cylinders > c1) 1612 dos_cylinders = c1; 1613 } 1614 1615 /* Try to deduce the number of heads from two different mappings. */ 1616 for (i = 0; i < MBR_PART_COUNT * 2 - 1; i++) { 1617 if (get_mapping(i, &c1, &h1, &s1, &a1) < 0) 1618 continue; 1619 a1 -= s1; 1620 for (j = i + 1; j < MBR_PART_COUNT * 2; j++) { 1621 if (get_mapping(j, &c2, &h2, &s2, &a2) < 0) 1622 continue; 1623 a2 -= s2; 1624 num = (uint64_t)h1 * a2 - (uint64_t)h2 * a1; 1625 denom = (uint64_t)c2 * a1 - (uint64_t)c1 * a2; 1626 if (denom != 0 && num != 0 && num % denom == 0) { 1627 xheads = num / denom; 1628 xsectors = a1 / (c1 * xheads + h1); 1629 break; 1630 } 1631 } 1632 if (xheads != -1) 1633 break; 1634 } 1635 1636 if (xheads == -1) { 1637 warnx("Cannot determine the number of heads"); 1638 return; 1639 } 1640 1641 if (xsectors == -1) { 1642 warnx("Cannot determine the number of sectors"); 1643 return; 1644 } 1645 1646 /* Estimate the number of cylinders. */ 1647 xcylinders = disklabel.d_secperunit / xheads / xsectors; 1648 if (disklabel.d_secperunit > xcylinders * xheads * xsectors) 1649 xcylinders++; 1650 1651 /* 1652 * Now verify consistency with each of the partition table entries. 1653 * Be willing to shove cylinders up a little bit to make things work, 1654 * but translation mismatches are fatal. 1655 */ 1656 for (i = 0; i < MBR_PART_COUNT * 2; i++) { 1657 if (get_mapping(i, &c1, &h1, &s1, &a1) < 0) 1658 continue; 1659 if (c1 >= MAXCYL - 2) 1660 continue; 1661 if (xsectors * (c1 * xheads + h1) + s1 != a1) 1662 return; 1663 } 1664 1665 1666 /* Everything checks out. 1667 * Reset the geometry to use for further calculations. 1668 * But cylinders cannot be > 1024. 1669 */ 1670 if (xcylinders > MAXCYL) 1671 dos_cylinders = MAXCYL; 1672 else 1673 dos_cylinders = xcylinders; 1674 dos_heads = xheads; 1675 dos_sectors = xsectors; 1676 } 1677 1678 /* 1679 * For the purposes of intuit_translated_geometry(), treat the partition 1680 * table as a list of eight mapping between (cylinder, head, sector) 1681 * triplets and absolute sectors. Get the relevant geometry triplet and 1682 * absolute sectors for a given entry, or return -1 if it isn't present. 1683 * Note: for simplicity, the returned sector is 0-based. 1684 */ 1685 static int 1686 get_mapping(int i, unsigned int *cylinder, unsigned int *head, unsigned int *sector, 1687 unsigned long *absolute) 1688 { 1689 struct mbr_partition *part = &mboot.mbr_parts[i / 2]; 1690 1691 if (part->mbrp_type == 0) 1692 return -1; 1693 if (i % 2 == 0) { 1694 *cylinder = MBR_PCYL(part->mbrp_scyl, part->mbrp_ssect); 1695 *head = part->mbrp_shd; 1696 *sector = MBR_PSECT(part->mbrp_ssect); 1697 *absolute = le32toh(part->mbrp_start); 1698 } else { 1699 *cylinder = MBR_PCYL(part->mbrp_ecyl, part->mbrp_esect); 1700 *head = part->mbrp_ehd; 1701 *sector = MBR_PSECT(part->mbrp_esect); 1702 *absolute = le32toh(part->mbrp_start) 1703 + le32toh(part->mbrp_size) - 1; 1704 } 1705 /* Sanity check the data against all zeroes */ 1706 if ((*cylinder == 0) && (*sector == 0) && (*head == 0)) 1707 return -1; 1708 /* sector numbers in the MBR partition table start at 1 */ 1709 *sector = *sector - 1; 1710 /* Sanity check the data against max values */ 1711 if ((((*cylinder * MAXHEAD) + *head) * MAXSECTOR + *sector) < *absolute) 1712 /* cannot be a CHS mapping */ 1713 return -1; 1714 return 0; 1715 } 1716 1717 static void 1718 delete_ptn(int part) 1719 { 1720 if (part == ext.ptn_id) { 1721 /* forget all about the extended partition */ 1722 free(ext.ptn); 1723 memset(&ext, 0, sizeof ext); 1724 } 1725 1726 mboot.mbr_parts[part].mbrp_type = 0; 1727 } 1728 1729 static void 1730 delete_ext_ptn(int part) 1731 { 1732 1733 if (part == 0) { 1734 ext.ptn[0].mbr_parts[0].mbrp_type = 0; 1735 return; 1736 } 1737 ext.ptn[part - 1].mbr_parts[1] = ext.ptn[part].mbr_parts[1]; 1738 memmove(&ext.ptn[part], &ext.ptn[part + 1], 1739 (ext.num_ptn - part - 1) * sizeof ext.ptn[0]); 1740 ext.num_ptn--; 1741 } 1742 1743 static int 1744 add_ext_ptn(daddr_t start, daddr_t size) 1745 { 1746 int part; 1747 struct mbr_partition *partp; 1748 struct mbr_sector *nptn; 1749 1750 nptn = realloc(ext.ptn, (ext.num_ptn + 1) * sizeof *ext.ptn); 1751 if (!nptn) 1752 err(1, "realloc"); 1753 ext.ptn = nptn; 1754 for (part = 0; part < ext.num_ptn; part++) 1755 if (ext_offset(part) > start) 1756 break; 1757 /* insert before 'part' - make space... */ 1758 memmove(&ext.ptn[part + 1], &ext.ptn[part], 1759 (ext.num_ptn - part) * sizeof ext.ptn[0]); 1760 memset(&ext.ptn[part], 0, sizeof ext.ptn[0]); 1761 ext.ptn[part].mbr_magic = LE_MBR_MAGIC; 1762 /* we will be 'part' */ 1763 if (part == 0) { 1764 /* link us to 'next' */ 1765 partp = &ext.ptn[0].mbr_parts[1]; 1766 /* offset will be fixed by caller */ 1767 partp->mbrp_size = htole32( 1768 le32toh(ext.ptn[1].mbr_parts[0].mbrp_start) + 1769 le32toh(ext.ptn[1].mbr_parts[0].mbrp_size)); 1770 } else { 1771 /* link us to prev's next */ 1772 partp = &ext.ptn[part - 1].mbr_parts[1]; 1773 ext.ptn[part].mbr_parts[1] = *partp; 1774 /* and prev onto us */ 1775 partp->mbrp_start = htole32(start - ptn_0_offset - ext.base); 1776 partp->mbrp_size = htole32(size + ptn_0_offset); 1777 } 1778 partp->mbrp_type = 5; /* as used by win98 */ 1779 partp->mbrp_flag = 0; 1780 /* wallop in some CHS values - win98 doesn't saturate them */ 1781 dos(le32toh(partp->mbrp_start), 1782 &partp->mbrp_scyl, &partp->mbrp_shd, &partp->mbrp_ssect); 1783 dos(le32toh(partp->mbrp_start) + le32toh(partp->mbrp_size) - 1, 1784 &partp->mbrp_ecyl, &partp->mbrp_ehd, &partp->mbrp_esect); 1785 ext.num_ptn++; 1786 1787 return part; 1788 } 1789 1790 static const char * 1791 check_overlap(int part, int sysid, daddr_t start, daddr_t size, int fix) 1792 { 1793 int p; 1794 unsigned int p_s, p_e; 1795 1796 if (sysid != 0) { 1797 if (start == 0) 1798 return "Sector zero is reserved for the MBR"; 1799 #if 0 1800 if (start < ptn_0_offset) 1801 /* This is just a convention, not a requirement */ 1802 return "Track zero is reserved for the BIOS"; 1803 #endif 1804 if (start + size > disksectors) 1805 return "Partition exceeds size of disk"; 1806 for (p = 0; p < MBR_PART_COUNT; p++) { 1807 if (p == part || mboot.mbr_parts[p].mbrp_type == 0) 1808 continue; 1809 p_s = le32toh(mboot.mbr_parts[p].mbrp_start); 1810 p_e = p_s + le32toh(mboot.mbr_parts[p].mbrp_size); 1811 if (start + size <= p_s || start >= p_e) 1812 continue; 1813 if (f_flag) { 1814 if (fix) 1815 delete_ptn(p); 1816 return 0; 1817 } 1818 return "Overlaps another partition"; 1819 } 1820 } 1821 1822 /* Are we trying to create an extended partition */ 1823 if (!MBR_IS_EXTENDED(mboot.mbr_parts[part].mbrp_type)) { 1824 /* this wasn't the extended partition */ 1825 if (!MBR_IS_EXTENDED(sysid)) 1826 return 0; 1827 /* making an extended partition */ 1828 if (ext.base != 0) { 1829 if (!f_flag) 1830 return "There cannot be 2 extended partitions"; 1831 if (fix) 1832 delete_ptn(ext.ptn_id); 1833 } 1834 if (fix) { 1835 /* allocate a new extended partition */ 1836 ext.ptn = calloc(1, sizeof ext.ptn[0]); 1837 if (ext.ptn == NULL) 1838 err(1, "Malloc failed"); 1839 ext.ptn[0].mbr_magic = LE_MBR_MAGIC; 1840 ext.ptn_id = part; 1841 ext.base = start; 1842 ext.limit = start + size; 1843 ext.num_ptn = 1; 1844 } 1845 return 0; 1846 } 1847 1848 /* Check we haven't cut space allocated to an extended ptn */ 1849 1850 if (!MBR_IS_EXTENDED(sysid)) { 1851 /* no longer an extended partition */ 1852 if (fix) { 1853 /* Kill all memory of the extended partitions */ 1854 delete_ptn(part); 1855 return 0; 1856 } 1857 if (ext.num_ptn == 0 || 1858 (ext.num_ptn == 1 && ext.ptn[0].mbr_parts[0].mbrp_type == 0)) 1859 /* nothing in extended partition */ 1860 return 0; 1861 if (f_flag) 1862 return 0; 1863 if (yesno("Do you really want to delete all the extended partitions?")) 1864 return 0; 1865 return "Extended partition busy"; 1866 } 1867 1868 if (le32toh(mboot.mbr_parts[part].mbrp_start) != ext.base) 1869 /* maybe impossible, but an extra sanity check */ 1870 return 0; 1871 1872 for (p = ext.num_ptn; --p >= 0;) { 1873 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1874 continue; 1875 p_s = ext_offset(p); 1876 p_e = p_s + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1877 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size); 1878 if (p_s >= start && p_e <= start + size) 1879 continue; 1880 if (!f_flag) 1881 return "Extended partition outside main partition"; 1882 if (fix) 1883 delete_ext_ptn(p); 1884 } 1885 1886 if (fix && start != ext.base) { 1887 /* The internal offsets need to be fixed up */ 1888 for (p = 0; p < ext.num_ptn - 1; p++) 1889 ext.ptn[p].mbr_parts[1].mbrp_start = htole32( 1890 le32toh(ext.ptn[p].mbr_parts[1].mbrp_start) 1891 + ext.base - start); 1892 /* and maybe an empty partition at the start */ 1893 if (ext.ptn[0].mbr_parts[0].mbrp_type == 0) { 1894 if (le32toh(ext.ptn[0].mbr_parts[1].mbrp_start) == 0) { 1895 /* don't need the empty slot */ 1896 memmove(&ext.ptn[0], &ext.ptn[1], 1897 (ext.num_ptn - 1) * sizeof ext.ptn[0]); 1898 ext.num_ptn--; 1899 } 1900 } else { 1901 /* must create an empty slot */ 1902 add_ext_ptn(start, ptn_0_offset); 1903 ext.ptn[0].mbr_parts[1].mbrp_start = htole32(ext.base 1904 - start); 1905 } 1906 } 1907 if (fix) { 1908 ext.base = start; 1909 ext.limit = start + size; 1910 } 1911 return 0; 1912 } 1913 1914 static const char * 1915 check_ext_overlap(int part, int sysid, daddr_t start, daddr_t size, int fix) 1916 { 1917 int p; 1918 unsigned int p_s, p_e; 1919 1920 if (sysid == 0) 1921 return 0; 1922 1923 if (MBR_IS_EXTENDED(sysid)) 1924 return "Nested extended partitions are not allowed"; 1925 1926 /* allow one track at start for extended partition header */ 1927 start -= ptn_0_offset; 1928 size += ptn_0_offset; 1929 if (start < ext.base || start + size > ext.limit) 1930 return "Outside bounds of extended partition"; 1931 1932 if (f_flag && !fix) 1933 return 0; 1934 1935 for (p = ext.num_ptn; --p >= 0;) { 1936 if (p == part || ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1937 continue; 1938 p_s = ext_offset(p); 1939 p_e = p_s + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1940 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size); 1941 if (p == 0) 1942 p_s += le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1943 - ptn_0_offset; 1944 if (start < p_e && start + size > p_s) { 1945 if (!f_flag) 1946 return "Overlaps another extended partition"; 1947 if (fix) { 1948 if (part == -1) 1949 delete_ext_ptn(p); 1950 else 1951 /* must not change numbering yet */ 1952 ext.ptn[p].mbr_parts[0].mbrp_type = 0; 1953 } 1954 } 1955 } 1956 return 0; 1957 } 1958 1959 static int 1960 change_part(int extended, int part, int sysid, daddr_t start, daddr_t size, 1961 char *bootmenu) 1962 { 1963 struct mbr_partition *partp; 1964 struct mbr_sector *boot; 1965 daddr_t offset; 1966 const char *e; 1967 int upart = part; 1968 int p; 1969 int fl; 1970 daddr_t n_s, n_e; 1971 const char *errtext; 1972 #ifdef BOOTSEL 1973 char tmp_bootmenu[MBR_PART_COUNT * (MBR_BS_PARTNAMESIZE + 1)]; 1974 int bootmenu_len = (extended ? MBR_PART_COUNT : 1) * (MBR_BS_PARTNAMESIZE + 1); 1975 #endif 1976 1977 if (extended) { 1978 if (part != -1 && part < ext.num_ptn) { 1979 boot = &ext.ptn[part]; 1980 partp = &boot->mbr_parts[0]; 1981 offset = ext_offset(part); 1982 } else { 1983 part = -1; 1984 boot = 0; 1985 partp = 0; 1986 offset = 0; 1987 } 1988 upart = 0; 1989 e = "E"; 1990 } else { 1991 boot = &mboot; 1992 partp = &boot->mbr_parts[part]; 1993 offset = 0; 1994 e = ""; 1995 } 1996 1997 if (!f_flag && part != -1) { 1998 printf("The data for partition %s%d is:\n", e, part); 1999 print_part(boot, upart, offset); 2000 } 2001 2002 #ifdef BOOTSEL 2003 if (bootmenu != NULL) 2004 strlcpy(tmp_bootmenu, bootmenu, bootmenu_len); 2005 else 2006 if (boot != NULL && boot->mbr_bootsel_magic == LE_MBR_BS_MAGIC) 2007 strlcpy(tmp_bootmenu, 2008 boot->mbr_bootsel.mbrbs_nametab[upart], 2009 bootmenu_len); 2010 else 2011 tmp_bootmenu[0] = 0; 2012 #endif 2013 2014 if (!s_flag && partp != NULL) { 2015 /* values not specified, default to current ones */ 2016 sysid = partp->mbrp_type; 2017 start = offset + le32toh(partp->mbrp_start); 2018 size = le32toh(partp->mbrp_size); 2019 } 2020 2021 /* creating a new partition, default to free space */ 2022 if (!s_flag && sysid == 0 && extended) { 2023 /* non-extended partition */ 2024 start = ext.base; 2025 for (p = 0; p < ext.num_ptn; p++) { 2026 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 2027 continue; 2028 n_s = ext_offset(p); 2029 if (n_s > start + ptn_0_offset) 2030 break; 2031 start = ext_offset(p) 2032 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 2033 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size); 2034 } 2035 if (ext.limit - start <= ptn_0_offset) { 2036 printf("No space in extended partition\n"); 2037 return 0; 2038 } 2039 start += ptn_0_offset; 2040 } 2041 2042 if (!s_flag && sysid == 0 && !extended) { 2043 /* same for non-extended partition */ 2044 /* first see if old start is free */ 2045 if (start < ptn_0_offset) 2046 start = 0; 2047 for (p = 0; start != 0 && p < MBR_PART_COUNT; p++) { 2048 if (mboot.mbr_parts[p].mbrp_type == 0) 2049 continue; 2050 n_s = le32toh(mboot.mbr_parts[p].mbrp_start); 2051 if (start >= n_s && 2052 start < n_s + le32toh(mboot.mbr_parts[p].mbrp_size)) 2053 start = 0; 2054 } 2055 if (start == 0) { 2056 /* Look for first gap */ 2057 start = ptn_0_offset; 2058 for (p = 0; p < MBR_PART_COUNT; p++) { 2059 if (mboot.mbr_parts[p].mbrp_type == 0) 2060 continue; 2061 n_s = le32toh(mboot.mbr_parts[p].mbrp_start); 2062 n_e = n_s + le32toh(mboot.mbr_parts[p].mbrp_size); 2063 if (start >= n_s && start < n_e) { 2064 start = n_e; 2065 p = -1; 2066 } 2067 } 2068 if (start >= disksectors) { 2069 printf("No free space\n"); 2070 return 0; 2071 } 2072 } 2073 } 2074 2075 if (!f_flag) { 2076 /* request new values from user */ 2077 if (sysid == 0) 2078 sysid = 169; 2079 sysid = decimal("sysid", sysid, 0, 0, 255); 2080 if (sysid == 0 && !v_flag) { 2081 start = 0; 2082 size = 0; 2083 #ifdef BOOTSEL 2084 tmp_bootmenu[0] = 0; 2085 #endif 2086 } else { 2087 daddr_t old = start; 2088 daddr_t lim = extended ? ext.limit : disksectors; 2089 start = decimal("start", start, 2090 DEC_SEC | DEC_RND_0 | (extended ? DEC_RND : 0), 2091 extended ? ext.base : 0, lim); 2092 /* Adjust 'size' so that end doesn't move when 'start' 2093 * is only changed slightly. 2094 */ 2095 if (size > start - old) 2096 size -= start - old; 2097 else 2098 size = 0; 2099 /* Find end of available space from this start point */ 2100 if (extended) { 2101 for (p = 0; p < ext.num_ptn; p++) { 2102 if (p == part) 2103 continue; 2104 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 2105 continue; 2106 n_s = ext_offset(p); 2107 if (n_s > start && n_s < lim) 2108 lim = n_s; 2109 if (start >= n_s && start < n_s 2110 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 2111 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size)) { 2112 lim = start; 2113 break; 2114 } 2115 } 2116 } else { 2117 for (p = 0; p < MBR_PART_COUNT; p++) { 2118 if (p == part) 2119 continue; 2120 if (mboot.mbr_parts[p].mbrp_type == 0) 2121 continue; 2122 n_s = le32toh(mboot.mbr_parts[p].mbrp_start); 2123 if (n_s > start && n_s < lim) 2124 lim = n_s; 2125 if (start >= n_s && start < n_s 2126 + le32toh(mboot.mbr_parts[p].mbrp_size)) { 2127 lim = start; 2128 break; 2129 } 2130 } 2131 } 2132 lim -= start; 2133 if (lim == 0) { 2134 printf("Start sector already allocated\n"); 2135 return 0; 2136 } 2137 if (size == 0 || size > lim) 2138 size = lim; 2139 fl = DEC_SEC; 2140 if (start % ptn_alignment == ptn_0_offset) 2141 fl |= DEC_RND_DOWN; 2142 if (start == 2 * ptn_0_offset) 2143 fl |= DEC_RND_DOWN | DEC_RND_DOWN_2; 2144 size = decimal("size", size, fl, 0, lim); 2145 #ifdef BOOTSEL 2146 #ifndef DEFAULT_BOOTEXTCODE 2147 if (!extended) 2148 #endif 2149 string("bootmenu", bootmenu_len, tmp_bootmenu); 2150 #endif 2151 } 2152 } 2153 2154 /* 2155 * Before we write these away, we must verify that nothing 2156 * untoward has been requested. 2157 */ 2158 2159 if (extended) 2160 errtext = check_ext_overlap(part, sysid, start, size, 0); 2161 else 2162 errtext = check_overlap(part, sysid, start, size, 0); 2163 if (errtext != NULL && !I_flag) { 2164 if (f_flag) 2165 errx(2, "%s\n", errtext); 2166 printf("%s\n", errtext); 2167 return 0; 2168 } 2169 2170 /* 2171 * Before proceeding, delete any overlapped partitions. 2172 * This can only happen if '-f' was supplied on the command line. 2173 * Just hope the caller knows what they are doing. 2174 * This also fixes the base of each extended partition if the 2175 * partition itself has moved. 2176 */ 2177 if (!I_flag) { 2178 if (extended) 2179 errtext = check_ext_overlap(part, sysid, start, size, 1); 2180 else 2181 errtext = check_overlap(part, sysid, start, size, 1); 2182 if (errtext) 2183 errx(1, "%s\n", errtext); 2184 } 2185 2186 2187 if (sysid == 0) { 2188 /* delete this partition - save info though */ 2189 if (partp == NULL) 2190 /* must have been trying to create an extended ptn */ 2191 return 0; 2192 if (start == 0 && size == 0) 2193 memset(partp, 0, sizeof *partp); 2194 #ifdef BOOTSEL 2195 if (boot->mbr_bootsel_magic == LE_MBR_BS_MAGIC) 2196 memset(boot->mbr_bootsel.mbrbs_nametab[upart], 0, 2197 sizeof boot->mbr_bootsel.mbrbs_nametab[0]); 2198 #endif 2199 if (extended) 2200 delete_ext_ptn(part); 2201 else 2202 delete_ptn(part); 2203 return 1; 2204 } 2205 2206 2207 if (extended) { 2208 if (part != -1) 2209 delete_ext_ptn(part); 2210 if (start == ext.base + ptn_0_offset) 2211 /* First one must have been free */ 2212 part = 0; 2213 else 2214 part = add_ext_ptn(start, size); 2215 2216 /* These must be re-calculated because of the realloc */ 2217 boot = &ext.ptn[part]; 2218 partp = &boot->mbr_parts[0]; 2219 offset = ext_offset(part); 2220 } 2221 2222 partp->mbrp_type = sysid; 2223 partp->mbrp_start = htole32( start - offset); 2224 partp->mbrp_size = htole32( size); 2225 dos(start, &partp->mbrp_scyl, &partp->mbrp_shd, &partp->mbrp_ssect); 2226 dos(start + size - 1, 2227 &partp->mbrp_ecyl, &partp->mbrp_ehd, &partp->mbrp_esect); 2228 #ifdef BOOTSEL 2229 if (extended) { 2230 boot->mbr_bootsel_magic = LE_MBR_BS_MAGIC; 2231 strncpy(boot->mbr_bootsel.mbrbs_nametab[upart], tmp_bootmenu, 2232 bootmenu_len); 2233 } else { 2234 /* We need to bootselect code installed in order to have 2235 * somewhere to safely write the menu tag. 2236 */ 2237 if (boot->mbr_bootsel_magic != LE_MBR_BS_MAGIC) { 2238 if (f_flag || 2239 yesno("The bootselect code is not installed, " 2240 "do you want to install it now?")) 2241 install_bootsel(MBR_BS_ACTIVE); 2242 } 2243 if (boot->mbr_bootsel_magic == LE_MBR_BS_MAGIC) { 2244 strncpy(boot->mbr_bootsel.mbrbs_nametab[upart], 2245 tmp_bootmenu, bootmenu_len); 2246 } 2247 } 2248 #endif 2249 2250 if (v_flag && !f_flag && yesno("Explicitly specify beg/end address?")) { 2251 /* this really isn't a good idea.... */ 2252 int tsector, tcylinder, thead; 2253 2254 tcylinder = MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect); 2255 thead = partp->mbrp_shd; 2256 tsector = MBR_PSECT(partp->mbrp_ssect); 2257 tcylinder = decimal("beginning cylinder", 2258 tcylinder, 0, 0, dos_cylinders - 1); 2259 thead = decimal("beginning head", 2260 thead, 0, 0, dos_heads - 1); 2261 tsector = decimal("beginning sector", 2262 tsector, 0, 1, dos_sectors); 2263 partp->mbrp_scyl = DOSCYL(tcylinder); 2264 partp->mbrp_shd = thead; 2265 partp->mbrp_ssect = DOSSECT(tsector, tcylinder); 2266 2267 tcylinder = MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect); 2268 thead = partp->mbrp_ehd; 2269 tsector = MBR_PSECT(partp->mbrp_esect); 2270 tcylinder = decimal("ending cylinder", 2271 tcylinder, 0, 0, dos_cylinders - 1); 2272 thead = decimal("ending head", 2273 thead, 0, 0, dos_heads - 1); 2274 tsector = decimal("ending sector", 2275 tsector, 0, 1, dos_sectors); 2276 partp->mbrp_ecyl = DOSCYL(tcylinder); 2277 partp->mbrp_ehd = thead; 2278 partp->mbrp_esect = DOSSECT(tsector, tcylinder); 2279 } 2280 2281 /* If we had to mark an extended partition as deleted because 2282 * another request would have overlapped it, now is the time 2283 * to do the actual delete. 2284 */ 2285 if (extended && f_flag) { 2286 for (p = ext.num_ptn; --p >= 0;) 2287 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 2288 delete_ext_ptn(p); 2289 } 2290 return 1; 2291 } 2292 2293 static void 2294 print_geometry(void) 2295 { 2296 2297 if (sh_flag) { 2298 printf("DISK=%s\n", disk); 2299 printf("DLCYL=%d\nDLHEAD=%d\nDLSEC=%d\nDLSIZE=%"PRIdaddr"\n", 2300 cylinders, heads, sectors, disksectors); 2301 printf("BCYL=%d\nBHEAD=%d\nBSEC=%d\nBDLSIZE=%"PRIdaddr"\n", 2302 dos_cylinders, dos_heads, dos_sectors, dos_disksectors); 2303 printf("NUMEXTPTN=%d\n", ext.num_ptn); 2304 return; 2305 } 2306 2307 /* Not sh_flag */ 2308 printf("Disk: %s\n", disk); 2309 printf("NetBSD disklabel disk geometry:\n"); 2310 printf("cylinders: %d, heads: %d, sectors/track: %d " 2311 "(%d sectors/cylinder)\ntotal sectors: %"PRIdaddr"\n\n", 2312 cylinders, heads, sectors, cylindersectors, disksectors); 2313 printf("BIOS disk geometry:\n"); 2314 printf("cylinders: %d, heads: %d, sectors/track: %d " 2315 "(%d sectors/cylinder)\ntotal sectors: %"PRIdaddr"\n\n", 2316 dos_cylinders, dos_heads, dos_sectors, dos_cylindersectors, 2317 dos_disksectors); 2318 printf("Partitions aligned to %d sector boundaries, offset %d\n\n", 2319 ptn_alignment, ptn_0_offset); 2320 } 2321 2322 /* Find the first active partition, else return MBR_PART_COUNT */ 2323 static int 2324 first_active(void) 2325 { 2326 struct mbr_partition *partp = &mboot.mbr_parts[0]; 2327 int part; 2328 2329 for (part = 0; part < MBR_PART_COUNT; part++) 2330 if (partp[part].mbrp_flag & MBR_PFLAG_ACTIVE) 2331 return part; 2332 return MBR_PART_COUNT; 2333 } 2334 2335 static void 2336 change_active(int which) 2337 { 2338 struct mbr_partition *partp; 2339 int part; 2340 int active = MBR_PART_COUNT; 2341 2342 partp = &mboot.mbr_parts[0]; 2343 2344 if (a_flag && which != -1) 2345 active = which; 2346 else 2347 active = first_active(); 2348 if (!f_flag) { 2349 if (yesno("Do you want to change the active partition?")) { 2350 printf ("Choosing %d will make no partition active.\n", 2351 MBR_PART_COUNT); 2352 do { 2353 active = decimal("active partition", 2354 active, 0, 0, MBR_PART_COUNT); 2355 } while (!yesno("Are you happy with this choice?")); 2356 } else 2357 return; 2358 } else 2359 if (active != MBR_PART_COUNT) 2360 printf ("Making partition %d active.\n", active); 2361 2362 for (part = 0; part < MBR_PART_COUNT; part++) 2363 partp[part].mbrp_flag &= ~MBR_PFLAG_ACTIVE; 2364 if (active < MBR_PART_COUNT) 2365 partp[active].mbrp_flag |= MBR_PFLAG_ACTIVE; 2366 } 2367 2368 static void 2369 change_bios_geometry(void) 2370 { 2371 print_geometry(); 2372 if (!yesno("Do you want to change our idea of what BIOS thinks?")) 2373 return; 2374 2375 #if defined(USE_DISKLIST) 2376 if (dl != NULL) { 2377 struct biosdisk_info *bip; 2378 int i; 2379 2380 for (i = 0; i < dl->dl_nbiosdisks; i++) { 2381 if (i == 0) 2382 printf("\nGeometries of known disks:\n"); 2383 bip = &dl->dl_biosdisks[i]; 2384 printf("Disk %d: cylinders %u, heads %u, sectors %u" 2385 " (%"PRIdaddr" sectors, %dMB)\n", 2386 i, bip->bi_cyl, bip->bi_head, bip->bi_sec, 2387 bip->bi_lbasecs, SEC_TO_MB(bip->bi_lbasecs)); 2388 2389 } 2390 printf("\n"); 2391 } 2392 #endif 2393 do { 2394 dos_cylinders = decimal("BIOS's idea of #cylinders", 2395 dos_cylinders, 0, 0, MAXCYL); 2396 dos_heads = decimal("BIOS's idea of #heads", 2397 dos_heads, 0, 0, MAXHEAD); 2398 dos_sectors = decimal("BIOS's idea of #sectors", 2399 dos_sectors, 0, 1, MAXSECTOR); 2400 print_geometry(); 2401 } while (!yesno("Are you happy with this choice?")); 2402 } 2403 2404 2405 /***********************************************\ 2406 * Change real numbers into strange dos numbers * 2407 \***********************************************/ 2408 static void 2409 dos(int sector, unsigned char *cylinderp, unsigned char *headp, 2410 unsigned char *sectorp) 2411 { 2412 int cylinder, head; 2413 2414 cylinder = sector / dos_cylindersectors; 2415 sector -= cylinder * dos_cylindersectors; 2416 2417 head = sector / dos_sectors; 2418 sector -= head * dos_sectors; 2419 if (cylinder > 1023) 2420 cylinder = 1023; 2421 2422 *cylinderp = DOSCYL(cylinder); 2423 *headp = head; 2424 *sectorp = DOSSECT(sector + 1, cylinder); 2425 } 2426 2427 static int 2428 open_disk(int update) 2429 { 2430 static char namebuf[MAXPATHLEN + 1]; 2431 int flags = update && disk_file == NULL ? O_RDWR : O_RDONLY; 2432 2433 if (!F_flag) { 2434 fd = opendisk(disk, flags, namebuf, sizeof(namebuf), 0); 2435 if (fd < 0) { 2436 if (errno == ENODEV) 2437 warnx("%s is not a character device", namebuf); 2438 else 2439 warn("cannot opendisk %s", namebuf); 2440 return (-1); 2441 } 2442 disk = namebuf; 2443 } else { 2444 fd = open(disk, flags, 0); 2445 if (fd == -1) { 2446 warn("cannot open %s", disk); 2447 return -1; 2448 } 2449 } 2450 2451 if (get_params() == -1) { 2452 close(fd); 2453 fd = -1; 2454 return (-1); 2455 } 2456 if (disk_file != NULL) { 2457 /* for testing: read/write data from a disk file */ 2458 wfd = open(disk_file, update ? O_RDWR|O_CREAT : O_RDONLY, 0777); 2459 if (wfd == -1) { 2460 warn("%s", disk_file); 2461 close(fd); 2462 fd = -1; 2463 return -1; 2464 } 2465 } else 2466 wfd = fd; 2467 return (0); 2468 } 2469 2470 static int 2471 read_disk(daddr_t sector, void *buf) 2472 { 2473 2474 if (*rfd == -1) 2475 errx(1, "read_disk(); fd == -1"); 2476 if (lseek(*rfd, sector * (off_t)512, 0) == -1) 2477 return (-1); 2478 return (read(*rfd, buf, 512)); 2479 } 2480 2481 static int 2482 write_disk(daddr_t sector, void *buf) 2483 { 2484 2485 if (wfd == -1) 2486 errx(1, "write_disk(); wfd == -1"); 2487 if (lseek(wfd, sector * (off_t)512, 0) == -1) 2488 return (-1); 2489 return (write(wfd, buf, 512)); 2490 } 2491 2492 static void 2493 guess_geometry(daddr_t _sectors) 2494 { 2495 dos_sectors = MAXSECTOR; 2496 dos_heads = MAXHEAD - 1; /* some BIOS might use 256 */ 2497 dos_cylinders = _sectors / (MAXSECTOR * (MAXHEAD - 1)); 2498 if (dos_cylinders < 1) 2499 dos_cylinders = 1; 2500 else if (dos_cylinders > MAXCYL - 1) 2501 dos_cylinders = MAXCYL - 1; 2502 } 2503 2504 static int 2505 get_params(void) 2506 { 2507 if (disk_type != NULL) { 2508 struct disklabel *tmplabel; 2509 2510 if ((tmplabel = getdiskbyname(disk_type)) == NULL) { 2511 warn("bad disktype"); 2512 return (-1); 2513 } 2514 disklabel = *tmplabel; 2515 } else if (F_flag) { 2516 struct stat st; 2517 if (fstat(fd, &st) == -1) { 2518 warn("fstat"); 2519 return (-1); 2520 } 2521 if (st.st_size % 512 != 0) { 2522 warnx("%s size (%lld) is not divisible " 2523 "by sector size (%d)", disk, (long long)st.st_size, 2524 512); 2525 } 2526 disklabel.d_secperunit = st.st_size / 512; 2527 guess_geometry(disklabel.d_secperunit); 2528 disklabel.d_ncylinders = dos_cylinders; 2529 disklabel.d_ntracks = dos_heads; 2530 disklabel.d_nsectors = dos_sectors; 2531 } else if (ioctl(fd, DIOCGDEFLABEL, &disklabel) == -1) { 2532 warn("DIOCGDEFLABEL"); 2533 if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { 2534 warn("DIOCGDINFO"); 2535 return (-1); 2536 } 2537 } 2538 2539 disksectors = disklabel.d_secperunit; 2540 cylinders = disklabel.d_ncylinders; 2541 heads = disklabel.d_ntracks; 2542 sectors = disklabel.d_nsectors; 2543 2544 /* pick up some defaults for the BIOS sizes */ 2545 if (sectors <= MAXSECTOR) { 2546 dos_cylinders = cylinders; 2547 dos_heads = heads; 2548 dos_sectors = sectors; 2549 } else { 2550 /* guess - has to better than the above */ 2551 guess_geometry(disksectors); 2552 } 2553 dos_disksectors = disksectors; 2554 2555 return (0); 2556 } 2557 2558 #ifdef BOOTSEL 2559 /* 2560 * Rather unfortunately the bootsel 'magic' number is at the end of the 2561 * the structure, and there is no checksum. So when other operating 2562 * systems install mbr code by only writing the length of their code they 2563 * can overwrite part of the structure but keeping the magic number intact. 2564 * This code attempts to empirically detect this problem. 2565 */ 2566 static int 2567 validate_bootsel(struct mbr_bootsel *mbs) 2568 { 2569 unsigned int key = mbs->mbrbs_defkey; 2570 unsigned int tmo; 2571 size_t i; 2572 2573 if (v_flag) 2574 return 0; 2575 2576 /* 2577 * Check default key is sane 2578 * - this is the most likely field to be stuffed 2579 * 16 disks and 16 bootable partitions seems enough! 2580 * (the keymap decode starts falling apart at that point) 2581 */ 2582 if (mbs->mbrbs_flags & MBR_BS_ASCII) { 2583 if (key != 0 && !(key == '\r' 2584 || (key >= '1' && key < '1' + MAX_BIOS_DISKS) 2585 || (key >= 'a' && key < 'a' + MAX_BIOS_DISKS))) 2586 return 1; 2587 } else { 2588 if (key != 0 && !(key == SCAN_ENTER 2589 || (key >= SCAN_1 && key < SCAN_1 + MAX_BIOS_DISKS) 2590 || (key >= SCAN_F1 && key < SCAN_F1 + MAX_BIOS_DISKS))) 2591 return 1; 2592 } 2593 2594 /* Checking the flags will lead to breakage... */ 2595 2596 /* Timeout value is expected to be a multiple of a second */ 2597 tmo = htole16(mbs->mbrbs_timeo); 2598 if (tmo != 0 && tmo != 0xffff && tmo != (10 * tmo + 9) / 182 * 182 / 10) 2599 return 2; 2600 2601 /* Check the menu strings are printable */ 2602 /* Unfortunately they aren't zero filled... */ 2603 for (i = 0; i < sizeof(mbs->mbrbs_nametab); i++) { 2604 int c = (uint8_t)mbs->mbrbs_nametab[0][i]; 2605 if (c == 0 || isprint(c)) 2606 continue; 2607 return 3; 2608 } 2609 2610 return 0; 2611 } 2612 #endif 2613 2614 static int 2615 read_s0(daddr_t offset, struct mbr_sector *boot) 2616 { 2617 const char *tabletype = offset ? "extended" : "primary"; 2618 #ifdef BOOTSEL 2619 static int reported; 2620 #endif 2621 2622 if (read_disk(offset, boot) == -1) { 2623 warn("Can't read %s partition table", tabletype); 2624 return -1; 2625 } 2626 if (boot->mbr_magic != LE_MBR_MAGIC) { 2627 warnx("%s partition table invalid, " 2628 "no magic in sector %"PRIdaddr, tabletype, offset); 2629 return -1; 2630 2631 } 2632 #ifdef BOOTSEL 2633 if (boot->mbr_bootsel_magic == LE_MBR_BS_MAGIC) { 2634 /* mbr_bootsel in new location */ 2635 if (validate_bootsel(&boot->mbr_bootsel)) { 2636 warnx("removing corrupt bootsel information"); 2637 boot->mbr_bootsel_magic = 0; 2638 } 2639 return 0; 2640 } 2641 if (boot->mbr_bootsel_magic != LE_MBR_MAGIC) 2642 return 0; 2643 2644 /* mbr_bootsel in old location */ 2645 if (!reported) 2646 warnx("%s partition table: using old-style bootsel information", 2647 tabletype); 2648 reported = 1; 2649 if (validate_bootsel((void *)((uint8_t *)boot + MBR_BS_OFFSET + 4))) { 2650 warnx("%s bootsel information corrupt - ignoring", tabletype); 2651 return 0; 2652 } 2653 memmove((uint8_t *)boot + MBR_BS_OFFSET, 2654 (uint8_t *)boot + MBR_BS_OFFSET + 4, 2655 sizeof(struct mbr_bootsel)); 2656 if ( ! (boot->mbr_bootsel.mbrbs_flags & MBR_BS_NEWMBR)) { 2657 /* old style default key */ 2658 int id; 2659 /* F1..F4 => ptn 0..3, F5+ => disk 0+ */ 2660 id = boot->mbr_bootsel.mbrbs_defkey; 2661 id -= SCAN_F1; 2662 if (id >= MBR_PART_COUNT) 2663 id -= MBR_PART_COUNT; /* Use number of disk */ 2664 else if (mboot.mbr_parts[id].mbrp_type != 0) 2665 id = le32toh(boot->mbr_parts[id].mbrp_start); 2666 else 2667 id = DEFAULT_ACTIVE; 2668 boot->mbr_bootsel.mbrbs_defkey = id; 2669 } 2670 boot->mbr_bootsel_magic = LE_MBR_BS_MAGIC; 2671 /* highlight that new bootsel code is necessary */ 2672 boot->mbr_bootsel.mbrbs_flags &= ~MBR_BS_NEWMBR; 2673 #endif /* BOOTSEL */ 2674 return 0; 2675 } 2676 2677 static int 2678 write_mbr(void) 2679 { 2680 int flag, i; 2681 daddr_t offset; 2682 int rval = -1; 2683 2684 /* 2685 * write enable label sector before write (if necessary), 2686 * disable after writing. 2687 * needed if the disklabel protected area also protects 2688 * sector 0. (e.g. empty disk) 2689 */ 2690 flag = 1; 2691 if (wfd == fd && F_flag == 0 && ioctl(wfd, DIOCWLABEL, &flag) < 0) 2692 warn("DIOCWLABEL"); 2693 if (write_disk(0, &mboot) == -1) { 2694 warn("Can't write fdisk partition table"); 2695 goto protect_label; 2696 } 2697 if (boot_installed) 2698 for (i = bootsize; (i -= 0x200) > 0;) 2699 if (write_disk(i / 0x200, &bootcode[i / 0x200]) == -1) { 2700 warn("Can't write bootcode"); 2701 goto protect_label; 2702 } 2703 for (offset = 0, i = 0; i < ext.num_ptn; i++) { 2704 if (write_disk(ext.base + offset, ext.ptn + i) == -1) { 2705 warn("Can't write %dth extended partition", i); 2706 goto protect_label; 2707 } 2708 offset = le32toh(ext.ptn[i].mbr_parts[1].mbrp_start); 2709 } 2710 rval = 0; 2711 protect_label: 2712 flag = 0; 2713 if (wfd == fd && F_flag == 0 && ioctl(wfd, DIOCWLABEL, &flag) < 0) 2714 warn("DIOCWLABEL"); 2715 return rval; 2716 } 2717 2718 static int 2719 yesno(const char *str, ...) 2720 { 2721 int ch, first; 2722 va_list ap; 2723 2724 va_start(ap, str); 2725 2726 vprintf(str, ap); 2727 printf(" [n] "); 2728 2729 first = ch = getchar(); 2730 while (ch != '\n' && ch != EOF) 2731 ch = getchar(); 2732 if (ch == EOF) 2733 errx(1, "EOF"); 2734 return (first == 'y' || first == 'Y'); 2735 } 2736 2737 static int64_t 2738 decimal(const char *prompt, int64_t dflt, int flags, int64_t minval, int64_t maxval) 2739 { 2740 int64_t acc = 0; 2741 int valid; 2742 int len; 2743 char *cp; 2744 2745 for (;;) { 2746 if (flags & DEC_SEC) { 2747 printf("%s: [%" PRId64 "..%" PRId64 "cyl default: %" PRId64 ", %" PRId64 "cyl, %uMB] ", 2748 prompt, SEC_TO_CYL(minval), SEC_TO_CYL(maxval), 2749 dflt, SEC_TO_CYL(dflt), SEC_TO_MB(dflt)); 2750 } else 2751 printf("%s: [%" PRId64 "..%" PRId64 " default: %" PRId64 "] ", 2752 prompt, minval, maxval, dflt); 2753 2754 if (!fgets(lbuf, LBUF, stdin)) 2755 errx(1, "EOF"); 2756 cp = lbuf; 2757 2758 cp += strspn(cp, " \t"); 2759 if (*cp == '\n') 2760 return dflt; 2761 2762 if (cp[0] == '$' && cp[1] == '\n') 2763 return maxval; 2764 2765 if (isdigit((unsigned char)*cp) || *cp == '-') { 2766 acc = strtoll(lbuf, &cp, 10); 2767 len = strcspn(cp, " \t\n"); 2768 valid = 0; 2769 if (len != 0 && (flags & DEC_SEC)) { 2770 if (!strncasecmp(cp, "gb", len)) { 2771 acc *= 1024; 2772 valid = 1; 2773 } 2774 if (valid || !strncasecmp(cp, "mb", len)) { 2775 acc *= SEC_IN_1M; 2776 /* round to whole number of cylinders */ 2777 acc += ptn_alignment / 2; 2778 acc /= ptn_alignment; 2779 valid = 1; 2780 } 2781 if (valid || !strncasecmp(cp, "cyl", len)) { 2782 acc *= ptn_alignment; 2783 /* adjustments for cylinder boundary */ 2784 if (acc == 0 && flags & DEC_RND_0) 2785 acc += ptn_0_offset; 2786 if (flags & DEC_RND) 2787 acc += ptn_0_offset; 2788 if (flags & DEC_RND_DOWN) 2789 acc -= ptn_0_offset; 2790 if (flags & DEC_RND_DOWN_2) 2791 acc -= ptn_0_offset; 2792 cp += len; 2793 } 2794 } 2795 } 2796 2797 cp += strspn(cp, " \t"); 2798 if (*cp != '\n') { 2799 lbuf[strlen(lbuf) - 1] = 0; 2800 printf("%s is not a valid %s number.\n", lbuf, 2801 flags & DEC_SEC ? "sector" : "decimal"); 2802 continue; 2803 } 2804 2805 if (acc >= minval && acc <= maxval) 2806 return acc; 2807 printf("%" PRId64 " is not between %" PRId64 " and %" PRId64 ".\n", acc, minval, maxval); 2808 } 2809 } 2810 2811 static int 2812 ptn_id(const char *prompt, int *extended) 2813 { 2814 unsigned int acc = 0; 2815 char *cp; 2816 2817 for (;; printf("%s is not a valid partition number.\n", lbuf)) { 2818 printf("%s: [none] ", prompt); 2819 2820 if (!fgets(lbuf, LBUF, stdin)) 2821 errx(1, "EOF"); 2822 lbuf[strlen(lbuf)-1] = '\0'; 2823 cp = lbuf; 2824 2825 cp += strspn(cp, " \t"); 2826 *extended = 0; 2827 if (*cp == 0) 2828 return -1; 2829 2830 if (*cp == 'E' || *cp == 'e') { 2831 cp++; 2832 *extended = 1; 2833 } 2834 2835 acc = strtoul(cp, &cp, 10); 2836 2837 cp += strspn(cp, " \t"); 2838 if (*cp != '\0') 2839 continue; 2840 2841 if (*extended || acc < MBR_PART_COUNT) 2842 return acc; 2843 } 2844 } 2845 2846 #ifdef BOOTSEL 2847 static void 2848 string(const char *prompt, int length, char *buf) 2849 { 2850 int len; 2851 2852 for (;;) { 2853 printf("%s: [%.*s] ", prompt, length, buf); 2854 2855 if (!fgets(lbuf, LBUF, stdin)) 2856 errx(1, "EOF"); 2857 len = strlen(lbuf); 2858 if (len <= 1) 2859 /* unchanged if just <enter> */ 2860 return; 2861 /* now strip trailing spaces, <space><enter> deletes string */ 2862 do 2863 lbuf[--len] = 0; 2864 while (len != 0 && lbuf[len - 1] == ' '); 2865 if (len < length) 2866 break; 2867 printf("'%s' is longer than %d characters.\n", 2868 lbuf, length - 1); 2869 } 2870 strncpy(buf, lbuf, length); 2871 } 2872 #endif 2873 2874 static int 2875 type_match(const void *key, const void *item) 2876 { 2877 const int *idp = key; 2878 const struct mbr_ptype *ptr = item; 2879 2880 if (*idp < ptr->id) 2881 return (-1); 2882 if (*idp > ptr->id) 2883 return (1); 2884 return (0); 2885 } 2886 2887 static const char * 2888 get_type(int type) 2889 { 2890 struct mbr_ptype *ptr; 2891 2892 ptr = bsearch(&type, mbr_ptypes, KNOWN_SYSIDS, 2893 sizeof(mbr_ptypes[0]), type_match); 2894 if (ptr == 0) 2895 return ("unknown"); 2896 return (ptr->name); 2897 } 2898 2899 static int 2900 read_gpt(daddr_t offset, struct gpt_hdr *gptp) 2901 { 2902 char buf[512]; 2903 struct gpt_hdr *hdr = (void *)buf; 2904 const char *tabletype = GPT_TYPE(offset); 2905 2906 if (read_disk(offset, buf) == -1) { 2907 warn("Can't read %s GPT header", tabletype); 2908 return -1; 2909 } 2910 (void)memcpy(gptp, buf, GPT_HDR_SIZE); 2911 2912 /* GPT CRC should be calculated with CRC field preset to zero */ 2913 hdr->hdr_crc_self = 0; 2914 2915 if (memcmp(gptp->hdr_sig, GPT_HDR_SIG, sizeof(gptp->hdr_sig)) 2916 || gptp->hdr_lba_self != (uint64_t)offset 2917 || crc32(0, (void *)hdr, gptp->hdr_size) != gptp->hdr_crc_self) { 2918 /* not a GPT */ 2919 (void)memset(gptp, 0, GPT_HDR_SIZE); 2920 } 2921 2922 if (v_flag && gptp->hdr_size != 0) { 2923 printf("Found %s GPT header CRC %"PRIu32" " 2924 "at sector %"PRIdaddr", backup at %"PRIdaddr"\n", 2925 tabletype, gptp->hdr_crc_self, offset, gptp->hdr_lba_alt); 2926 } 2927 return gptp->hdr_size; 2928 2929 } 2930 2931 static int 2932 delete_gpt(struct gpt_hdr *gptp) 2933 { 2934 char buf[512]; 2935 struct gpt_hdr *hdr = (void *)buf; 2936 2937 if (gptp->hdr_size == 0) 2938 return 0; 2939 2940 /* don't accidently overwrite something important */ 2941 if (gptp->hdr_lba_self != GPT_HDR_BLKNO && 2942 gptp->hdr_lba_self != (uint64_t)disksectors - 1) { 2943 warnx("given GPT header location doesn't seem correct"); 2944 return -1; 2945 } 2946 2947 (void)memcpy(buf, gptp, GPT_HDR_SIZE); 2948 /* 2949 * Don't really delete GPT, just "disable" it, so it can 2950 * be recovered later in case of mistake or something 2951 */ 2952 (void)memset(hdr->hdr_sig, 0, sizeof(gptp->hdr_sig)); 2953 if (write_disk(gptp->hdr_lba_self, hdr) == -1) { 2954 warn("can't delete %s GPT header", 2955 GPT_TYPE(gptp->hdr_lba_self)); 2956 return -1; 2957 } 2958 (void)memset(gptp, 0, GPT_HDR_SIZE); 2959 return 1; 2960 } 2961
Indexes created Mon Sep 22 21:09:42 GMT 2025