fdisk.c revision 1.80
1 /* $NetBSD: fdisk.c,v 1.80 2004/05/19 07:36:14 dyoung 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 #include <sys/cdefs.h> 36 37 #ifndef lint 38 __RCSID("$NetBSD: fdisk.c,v 1.80 2004/05/19 07:36:14 dyoung Exp $"); 39 #endif /* not lint */ 40 41 #include <sys/types.h> 42 #include <sys/disklabel.h> 43 #include <sys/bootblock.h> 44 #include <sys/ioctl.h> 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <sys/sysctl.h> 48 49 #include <ctype.h> 50 #include <disktab.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <fcntl.h> 54 #include <paths.h> 55 #include <stdarg.h> 56 #include <stddef.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <util.h> 62 63 #define DEFAULT_BOOTDIR "/usr/mdec" 64 65 #if defined(__i386__) || defined(__x86_64__) 66 #include <machine/cpu.h> 67 #define BOOTSEL 68 69 #define DEFAULT_BOOTCODE "mbr" 70 #define DEFAULT_BOOTSELCODE "mbr_bootsel" 71 #define DEFAULT_BOOTEXTCODE "mbr_ext" 72 73 /* Scan values for the various keys we use, as returned by the BIOS */ 74 #define SCAN_ENTER 0x1c 75 #define SCAN_F1 0x3b 76 #define SCAN_1 0x2 77 78 #endif 79 80 #define LBUF 100 81 static char lbuf[LBUF]; 82 83 #ifndef PRIdaddr 84 #define PRIdaddr PRId64 85 #endif 86 87 #ifndef _PATH_DEFDISK 88 #define _PATH_DEFDISK "/dev/rwd0d" 89 #endif 90 91 const char *disk = _PATH_DEFDISK; 92 93 struct disklabel disklabel; /* disk parameters */ 94 95 uint cylinders, sectors, heads; 96 daddr_t disksectors; 97 #define cylindersectors (heads * sectors) 98 99 struct mbr_sector mboot; 100 101 102 struct { 103 struct mbr_sector *ptn; /* array of pbrs */ 104 daddr_t base; /* first sector of ext. ptn */ 105 daddr_t limit; /* last sector of ext. ptn */ 106 int num_ptn; /* number of contained partitions */ 107 int ptn_id; /* entry in mbr */ 108 int is_corrupt; /* 1 if extended chain illegal */ 109 } ext; 110 111 char *boot_dir = DEFAULT_BOOTDIR; 112 char *boot_path = 0; /* name of file we actually opened */ 113 114 #ifdef BOOTSEL 115 116 #define DEFAULT_ACTIVE (~(daddr_t)0) 117 118 #define OPTIONS "0123BFSafiluvs:b:c:E:r:w:t:T:" 119 #else 120 #define change_part(e, p, id, st, sz, bm) change__part(e, p, id, st, sz) 121 #define OPTIONS "0123FSafiluvs:b:c:E:r:w:" 122 #endif 123 124 uint dos_cylinders; 125 uint dos_heads; 126 uint dos_sectors; 127 daddr_t dos_disksectors; 128 #define dos_cylindersectors (dos_heads * dos_sectors) 129 #define dos_totalsectors (dos_heads * dos_sectors * dos_cylinders) 130 131 #define DOSSECT(s,c) (((s) & 0x3f) | (((c) >> 2) & 0xc0)) 132 #define DOSCYL(c) ((c) & 0xff) 133 #define SEC_IN_1M (1024 * 1024 / 512) 134 #define SEC_TO_MB(sec) ((uint)(((sec) + SEC_IN_1M / 2) / SEC_IN_1M)) 135 #define SEC_TO_CYL(sec) (((sec) + dos_cylindersectors/2) / dos_cylindersectors) 136 137 #define MAXCYL 1024 /* Usual limit is 1023 */ 138 #define MAXHEAD 256 /* Usual limit is 255 */ 139 #define MAXSECTOR 63 140 int partition = -1; 141 142 int fd = -1, wfd = -1, *rfd = &fd; 143 char *disk_file; 144 char *disk_type = NULL; 145 146 int a_flag; /* set active partition */ 147 int i_flag; /* init bootcode */ 148 int u_flag; /* update partition data */ 149 int v_flag; /* more verbose */ 150 int sh_flag; /* Output data as shell defines */ 151 int f_flag; /* force --not interactive */ 152 int s_flag; /* set id,offset,size */ 153 int b_flag; /* Set cyl, heads, secs (as c/h/s) */ 154 int B_flag; /* Edit/install bootselect code */ 155 int E_flag; /* extended partition number */ 156 int b_cyl, b_head, b_sec; /* b_flag values. */ 157 int F_flag = 0; 158 159 struct mbr_sector bootcode[8192 / sizeof (struct mbr_sector)]; 160 int bootsize; /* actual size of bootcode */ 161 int boot_installed; /* 1 if we've copied code into the mbr */ 162 163 #if defined(__i386__) || defined(__x86_64__) 164 struct disklist *dl; 165 #endif 166 167 168 static char reserved[] = "reserved"; 169 170 struct part_type { 171 int type; 172 const char *name; 173 } part_types[] = { 174 {0x00, "<UNUSED>"}, 175 {0x01, "Primary DOS with 12 bit FAT"}, 176 {0x02, "XENIX / filesystem"}, 177 {0x03, "XENIX /usr filesystem"}, 178 {0x04, "Primary DOS with 16 bit FAT <32M"}, 179 {0x05, "Extended partition"}, 180 {0x06, "Primary 'big' DOS, 16-bit FAT (> 32MB)"}, 181 {0x07, "OS/2 HPFS or NTFS or QNX2 or Advanced UNIX"}, 182 {0x08, "AIX filesystem or OS/2 (thru v1.3) or DELL multiple drives" 183 "or Commodore DOS or SplitDrive"}, 184 {0x09, "AIX boot partition or Coherent"}, 185 {0x0A, "OS/2 Boot Manager or Coherent swap or OPUS"}, 186 {0x0b, "Primary DOS with 32 bit FAT"}, 187 {0x0c, "Primary DOS with 32 bit FAT - LBA"}, 188 {0x0d, "Type 7??? - LBA"}, 189 {0x0E, "DOS (16-bit FAT) - LBA"}, 190 {0x0F, "Ext. partition - LBA"}, 191 {0x10, "OPUS"}, 192 {0x11, "OS/2 BM: hidden DOS 12-bit FAT"}, 193 {0x12, "Compaq diagnostics"}, 194 {0x14, "OS/2 BM: hidden DOS 16-bit FAT <32M or Novell DOS 7.0 bug"}, 195 {0x16, "OS/2 BM: hidden DOS 16-bit FAT >=32M"}, 196 {0x17, "OS/2 BM: hidden IFS"}, 197 {0x18, "AST Windows swapfile"}, 198 {0x19, "Willowtech Photon coS"}, 199 {0x1e, "hidden FAT95"}, 200 {0x20, "Willowsoft OFS1"}, 201 {0x21, reserved}, 202 {0x23, reserved}, 203 {0x24, "NEC DOS"}, 204 {0x26, reserved}, 205 {0x31, reserved}, 206 {0x33, reserved}, 207 {0x34, reserved}, 208 {0x36, reserved}, 209 {0x38, "Theos"}, 210 {0x3C, "PartitionMagic recovery"}, 211 {0x40, "VENIX 286 or LynxOS"}, 212 {0x41, "Linux/MINIX (sharing disk with DRDOS) or Personal RISC boot"}, 213 {0x42, "SFS or Linux swap (sharing disk with DRDOS)"}, 214 {0x43, "Linux native (sharing disk with DRDOS)"}, 215 {0x4D, "QNX4.x"}, 216 {0x4E, "QNX4.x 2nd part"}, 217 {0x4F, "QNX4.x 3rd part"}, 218 {0x50, "DM (disk manager)"}, 219 {0x51, "DM6 Aux1 (or Novell)"}, 220 {0x52, "CP/M or Microport SysV/AT"}, 221 {0x53, "DM6 Aux3"}, 222 {0x54, "DM6 DDO"}, 223 {0x55, "EZ-Drive (disk manager)"}, 224 {0x56, "Golden Bow (disk manager)"}, 225 {0x5C, "Priam Edisk (disk manager)"}, 226 {0x61, "SpeedStor"}, 227 {0x63, "GNU HURD or Mach or Sys V/386 (such as ISC UNIX) or MtXinu"}, 228 {0x64, "Novell Netware 2.xx or Speedstore"}, 229 {0x65, "Novell Netware 3.xx"}, 230 {0x66, "Novell 386 Netware"}, 231 {0x67, "Novell"}, 232 {0x68, "Novell"}, 233 {0x69, "Novell"}, 234 {0x70, "DiskSecure Multi-Boot"}, 235 {0x71, reserved}, 236 {0x73, reserved}, 237 {0x74, reserved}, 238 {0x75, "PC/IX"}, 239 {0x76, reserved}, 240 {0x80, "MINIX until 1.4a"}, 241 {0x81, "MINIX since 1.4b, early Linux, Mitac dmgr"}, 242 {0x82, "Linux swap or Prime or Solaris"}, 243 {0x83, "Linux native"}, 244 {0x84, "OS/2 hidden C: drive"}, 245 {0x85, "Linux extended"}, 246 {0x86, "NT FAT volume set"}, 247 {0x87, "NTFS volume set or HPFS mirrored"}, 248 {0x93, "Amoeba filesystem"}, 249 {0x94, "Amoeba bad block table"}, 250 {0x99, "Mylex EISA SCSI"}, 251 {0x9f, "BSDI?"}, 252 {0xA0, "IBM Thinkpad hibernation"}, 253 {0xa1, reserved}, 254 {0xa3, reserved}, 255 {0xa4, reserved}, 256 {0xA5, "FreeBSD or 386BSD or old NetBSD"}, 257 {0xA6, "OpenBSD"}, 258 {0xA7, "NeXTSTEP 486"}, 259 {0xa8, "Apple UFS"}, 260 {0xa9, "NetBSD"}, 261 {0xab, "Apple Boot"}, 262 {0xaf, "Apple HFS"}, 263 {0xb1, reserved}, 264 {0xb3, reserved}, 265 {0xb4, reserved}, 266 {0xb6, reserved}, 267 {0xB7, "BSDI BSD/386 filesystem"}, 268 {0xB8, "BSDI BSD/386 swap"}, 269 {0xc0, "CTOS"}, 270 {0xC1, "DRDOS/sec (FAT-12)"}, 271 {0xC4, "DRDOS/sec (FAT-16, < 32M)"}, 272 {0xC6, "DRDOS/sec (FAT-16, >= 32M)"}, 273 {0xC7, "Syrinx (Cyrnix?) or HPFS disabled"}, 274 {0xd8, "CP/M 86"}, 275 {0xDB, "CP/M or Concurrent CP/M or Concurrent DOS or CTOS"}, 276 {0xE1, "DOS access or SpeedStor 12-bit FAT extended partition"}, 277 {0xE3, "DOS R/O or SpeedStor or Storage Dimensions"}, 278 {0xE4, "SpeedStor 16-bit FAT extended partition < 1024 cyl."}, 279 {0xe5, reserved}, 280 {0xe6, reserved}, 281 {0xeb, "BeOS"}, 282 {0xF1, "SpeedStor or Storage Dimensions"}, 283 {0xF2, "DOS 3.3+ Secondary"}, 284 {0xf3, reserved}, 285 {0xF4, "SpeedStor large partition or Storage Dimensions"}, 286 {0xf6, reserved}, 287 {0xFE, "SpeedStor >1024 cyl. or LANstep or IBM PS/2 IML"}, 288 {0xFF, "Xenix Bad Block Table"}, 289 }; 290 291 #define KNOWN_SYSIDS (sizeof(part_types)/sizeof(part_types[0])) 292 293 void usage(void); 294 void print_s0(int); 295 void print_part(struct mbr_sector *, int, daddr_t); 296 void print_mbr_partition(struct mbr_sector *, int, daddr_t, daddr_t, int); 297 int read_boot(const char *, void *, size_t, int); 298 void init_sector0(int); 299 void intuit_translated_geometry(void); 300 void get_geometry(void); 301 void get_extended_ptn(void); 302 void get_diskname(const char *, char *, size_t); 303 int change_part(int, int, int, daddr_t, daddr_t, char *); 304 void print_params(void); 305 void change_active(int); 306 void get_params_to_use(void); 307 void dos(int, unsigned char *, unsigned char *, unsigned char *); 308 int open_disk(int); 309 int read_disk(daddr_t, void *); 310 int write_disk(daddr_t, void *); 311 int get_params(void); 312 int read_s0(daddr_t, struct mbr_sector *); 313 int write_mbr(void); 314 int yesno(const char *, ...); 315 int decimal(const char *, int, int, int, int); 316 #define DEC_SEC 1 /* asking for a sector number */ 317 #define DEC_RND 2 /* round to end of first track */ 318 #define DEC_RND_0 4 /* round 0 to size of a track */ 319 #define DEC_RND_DOWN 8 /* subtract 1 track */ 320 #define DEC_RND_DOWN_2 16 /* subtract 2 tracks */ 321 void string(const char *, int, char *); 322 int ptn_id(const char *, int *); 323 int type_match(const void *, const void *); 324 const char *get_type(int); 325 int get_mapping(int, uint *, uint *, uint *, unsigned long *); 326 #ifdef BOOTSEL 327 daddr_t configure_bootsel(daddr_t); 328 void install_bootsel(int); 329 daddr_t get_default_boot(void); 330 void set_default_boot(daddr_t); 331 #endif 332 333 334 int main(int, char *[]); 335 336 int 337 main(int argc, char *argv[]) 338 { 339 struct stat sb; 340 int ch, mib[2]; 341 size_t len; 342 char *root_device; 343 char *cp; 344 int n; 345 #ifdef BOOTSEL 346 daddr_t default_ptn; /* start sector of default ptn */ 347 char *cbootmenu = 0; 348 #endif 349 350 int csysid, cstart, csize; /* For the b_flag. */ 351 352 mib[0] = CTL_KERN; 353 mib[1] = KERN_ROOT_DEVICE; 354 if (sysctl(mib, 2, NULL, &len, NULL, 0) != -1 && 355 (root_device = malloc(len)) != NULL && 356 sysctl(mib, 2, root_device, &len, NULL, 0) != -1) 357 disk = root_device; 358 359 a_flag = i_flag = u_flag = sh_flag = f_flag = s_flag = b_flag = 0; 360 v_flag = 0; 361 E_flag = 0; 362 csysid = cstart = csize = 0; 363 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 364 switch (ch) { 365 case '0': 366 partition = 0; 367 break; 368 case '1': 369 partition = 1; 370 break; 371 case '2': 372 partition = 2; 373 break; 374 case '3': 375 partition = 3; 376 break; 377 case 'E': /* Extended partition number */ 378 E_flag = 1; 379 partition = strtoul(optarg, &cp, 0); 380 if (*cp || partition < 0) 381 errx(1, "Bad partition number -E %s.", optarg); 382 break; 383 #ifdef BOOTSEL 384 case 'B': /* Bootselect parameters */ 385 B_flag = 1; 386 break; 387 #endif 388 case 'F': /* device argument is really a file */ 389 F_flag = 1; 390 break; 391 case 'S': /* Output as shell variables */ 392 sh_flag = 1; 393 break; 394 case 'a': /* Set active partition */ 395 a_flag = 1; 396 break; 397 case 'f': /* Non interactive */ 398 f_flag = 1; 399 break; 400 case 'i': /* Always update bootcode */ 401 i_flag = 1; 402 break; 403 case 'l': /* List known partition types */ 404 for (len = 0; len < KNOWN_SYSIDS; len++) 405 printf("%03d %s\n", part_types[len].type, 406 part_types[len].name); 407 return 0; 408 case 'u': /* Update partition details */ 409 u_flag = 1; 410 break; 411 case 'v': /* Be verbose */ 412 v_flag++; 413 break; 414 case 's': /* Partition details */ 415 s_flag = 1; 416 if (sscanf(optarg, "%d/%d/%d%n", &csysid, &cstart, 417 &csize, &n) == 3) { 418 if (optarg[n] == 0) 419 break; 420 #ifdef BOOTSEL 421 if (optarg[n] == '/') { 422 cbootmenu = optarg + n + 1; 423 break; 424 } 425 #endif 426 } 427 errx(1, "Bad argument to the -s flag."); 428 break; 429 case 'b': /* BIOS geometry */ 430 b_flag = 1; 431 if (sscanf(optarg, "%d/%d/%d%n", &b_cyl, &b_head, 432 &b_sec, &n) != 3 || optarg[n] != 0) 433 errx(1, "Bad argument to the -b flag."); 434 if (b_cyl > MAXCYL) 435 b_cyl = MAXCYL; 436 break; 437 case 'c': /* file/directory containing boot code */ 438 if (strchr(optarg, '/') != NULL && 439 stat(optarg, &sb) == 0 && 440 (sb.st_mode & S_IFMT) == S_IFDIR) { 441 boot_dir = optarg; 442 break; 443 } 444 bootsize = read_boot(optarg, bootcode, 445 sizeof bootcode, 1); 446 i_flag = 1; 447 break; 448 case 'r': /* read data from disk_file (not raw disk) */ 449 rfd = &wfd; 450 /* FALLTHROUGH */ 451 case 'w': /* write data to disk_file */ 452 disk_file = optarg; 453 break; 454 case 't': 455 if (setdisktab(optarg) == -1) 456 errx(EXIT_FAILURE, "bad disktab"); 457 break; 458 case 'T': 459 disk_type = optarg; 460 break; 461 default: 462 usage(); 463 } 464 argc -= optind; 465 argv += optind; 466 467 if (disk_type != NULL && getdiskbyname(disk_type) == NULL) 468 errx(EXIT_FAILURE, "bad disktype"); 469 470 if (sh_flag && (a_flag || i_flag || u_flag || f_flag || s_flag)) 471 usage(); 472 473 if (B_flag && f_flag) { 474 warnx("Bootselector may only be configured interactively"); 475 usage(); 476 } 477 478 if (f_flag && u_flag && !s_flag) { 479 warnx("Partition data not specified"); 480 usage(); 481 } 482 483 if (s_flag && partition == -1) { 484 warnx("-s flag requires a partition selected."); 485 usage(); 486 } 487 488 if (argc > 0) 489 disk = argv[0]; 490 491 if (open_disk(B_flag || a_flag || i_flag || u_flag) < 0) 492 exit(1); 493 494 if (read_s0(0, &mboot)) 495 /* must have been a blank disk */ 496 init_sector0(1); 497 498 #if defined(__i386__) || defined(__x86_64__) 499 get_geometry(); 500 #else 501 intuit_translated_geometry(); 502 #endif 503 get_extended_ptn(); 504 505 #ifdef BOOTSEL 506 default_ptn = get_default_boot(); 507 #endif 508 509 if (E_flag && !u_flag && partition >= ext.num_ptn) 510 errx(1, "Extended partition %d is not defined.", partition); 511 512 if (u_flag && (!f_flag || b_flag)) 513 get_params_to_use(); 514 515 /* Do the update stuff! */ 516 if (u_flag) { 517 if (s_flag) 518 change_part(E_flag, partition, csysid, cstart, csize, 519 cbootmenu); 520 else { 521 int part = partition, chg_ext = E_flag, prompt = 1; 522 do { 523 if (prompt) { 524 printf("\n"); 525 print_s0(partition); 526 } 527 if (partition == -1) 528 part = ptn_id( 529 "Which partition do you want to change?", 530 &chg_ext); 531 if (part < 0) 532 break; 533 prompt = change_part(chg_ext, part, 0, 0, 0, 0); 534 } while (partition == -1); 535 } 536 } else 537 if (!i_flag && !B_flag) { 538 print_params(); 539 print_s0(partition); 540 } 541 542 if (a_flag && !E_flag) 543 change_active(partition); 544 545 #ifdef BOOTSEL 546 if (B_flag || u_flag || i_flag) 547 /* Ensure the mbr code supports this configuration */ 548 install_bootsel(0); 549 if (B_flag) 550 default_ptn = configure_bootsel(default_ptn); 551 set_default_boot(default_ptn); 552 #else 553 if (i_flag) 554 init_sector0(0); 555 #endif 556 557 if (u_flag || a_flag || i_flag || B_flag) { 558 if (!f_flag) { 559 printf("\nWe haven't written the MBR back to disk " 560 "yet. This is your last chance.\n"); 561 if (u_flag) 562 print_s0(-1); 563 if (yesno("Should we write new partition table?")) 564 write_mbr(); 565 } else 566 write_mbr(); 567 } 568 569 exit(0); 570 } 571 572 void 573 usage(void) 574 { 575 int indent = 7 + (int)strlen(getprogname()) + 1; 576 577 (void)fprintf(stderr, "usage: %s [-afiluvBS] " 578 "[-b cylinders/heads/sectors] \\\n" 579 "%*s[-0123 | -E num " 580 "[-s id/start/size[/bootmenu]]] \\\n" 581 "%*s[-t disktab] [-T disktype] \\\n" 582 "%*s[-c bootcode] [-r|-w file] [device]\n" 583 "\t-a change active partition\n" 584 "\t-f force - not interactive\n" 585 "\t-i initialise MBR code\n" 586 "\t-l list partition types\n" 587 "\t-u update partition data\n" 588 "\t-v verbose output, -v -v more verbose still\n" 589 "\t-B update bootselect options\n" 590 "\t-F treat device as a regular file\n" 591 "\t-S output as shell defines\n", 592 getprogname(), indent, "", indent, "", indent, ""); 593 exit(1); 594 } 595 596 static daddr_t 597 ext_offset(int part) 598 { 599 daddr_t offset = ext.base; 600 601 if (part != 0) 602 offset += le32toh(ext.ptn[part - 1].mbr_parts[1].mbrp_start); 603 return offset; 604 } 605 606 void 607 print_s0(int which) 608 { 609 int part; 610 611 if (which == -1) { 612 if (!sh_flag) 613 printf("Partition table:\n"); 614 for (part = 0; part < MBR_PART_COUNT; part++) { 615 if (!sh_flag) 616 printf("%d: ", part); 617 print_part(&mboot, part, 0); 618 } 619 if (!sh_flag) { 620 if (ext.is_corrupt) 621 printf("Extended partition table is currupt\n"); 622 else 623 if (ext.num_ptn != 0) 624 printf("Extended partition table:\n"); 625 } 626 for (part = 0; part < ext.num_ptn; part++) { 627 if (!sh_flag) 628 printf("E%d: ", part); 629 print_part(&ext.ptn[part], 0, ext_offset(part)); 630 if (!sh_flag && v_flag >= 2) { 631 printf("link: "); 632 print_mbr_partition(&ext.ptn[part], 1, 633 ext_offset(part), ext.base, 0); 634 } 635 } 636 #ifdef BOOTSEL 637 if (!sh_flag && 638 le16toh(mboot.mbr_bootsel_magic) == MBR_BS_MAGIC) { 639 int tmo; 640 641 printf("Bootselector "); 642 if (mboot.mbr_bootsel.mbrbs_flags & MBR_BS_ACTIVE) { 643 printf("enabled"); 644 tmo = le16toh(mboot.mbr_bootsel.mbrbs_timeo); 645 if (tmo == 0xffff) 646 printf(", infinite timeout"); 647 else 648 printf(", timeout %d seconds", 649 (10 * tmo + 9) / 182); 650 } else 651 printf("disabled"); 652 printf(".\n"); 653 } 654 #endif 655 return; 656 } 657 658 if (E_flag) { 659 if (!sh_flag) 660 printf("Extended partition E%d:\n", which); 661 if (which > ext.num_ptn) 662 printf("Undefined\n"); 663 else 664 print_part(&ext.ptn[which], 0, ext_offset(which)); 665 } else { 666 if (!sh_flag) 667 printf("Partition %d:\n", which); 668 print_part(&mboot, which, 0); 669 } 670 } 671 672 void 673 print_part(struct mbr_sector *boot, int part, daddr_t offset) 674 { 675 struct mbr_partition *partp; 676 char *e; 677 678 if (!sh_flag) { 679 print_mbr_partition(boot, part, offset, 0, 0); 680 return; 681 } 682 683 partp = &boot->mbr_parts[part]; 684 if (boot != &mboot) { 685 part = boot - ext.ptn; 686 e = "E"; 687 } else 688 e = ""; 689 690 if (partp->mbrp_type == 0) { 691 printf("PART%s%dSIZE=0\n", e, part); 692 return; 693 } 694 695 printf("PART%s%dID=%d\n", e, part, partp->mbrp_type); 696 printf("PART%s%dSIZE=%u\n", e, part, le32toh(partp->mbrp_size)); 697 printf("PART%s%dSTART=%"PRIdaddr"\n", e, part, 698 offset + le32toh(partp->mbrp_start)); 699 printf("PART%s%dFLAG=0x%x\n", e, part, partp->mbrp_flag); 700 printf("PART%s%dBCYL=%d\n", e, part, 701 MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect)); 702 printf("PART%s%dBHEAD=%d\n", e, part, partp->mbrp_shd); 703 printf("PART%s%dBSEC=%d\n", e, part, MBR_PSECT(partp->mbrp_ssect)); 704 printf("PART%s%dECYL=%d\n", e, part, 705 MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect)); 706 printf("PART%s%dEHEAD=%d\n", e, part, partp->mbrp_ehd); 707 printf("PART%s%dESEC=%d\n", e, part, MBR_PSECT(partp->mbrp_esect)); 708 } 709 710 static void 711 pr_cyls(daddr_t sector) 712 { 713 ulong cyl, head, sect; 714 cyl = sector / dos_cylindersectors; 715 sect = sector - cyl * dos_cylindersectors; 716 head = sect / dos_sectors; 717 sect -= head * dos_sectors; 718 719 printf("%lu", cyl); 720 if (head == 0 && sect == 0) 721 return; 722 printf("/%lu/%lu", head, sect + 1); 723 } 724 725 void 726 print_mbr_partition(struct mbr_sector *boot, int part, 727 daddr_t offset, daddr_t exoffset, int indent) 728 { 729 daddr_t start; 730 daddr_t size; 731 struct mbr_partition *partp = &boot->mbr_parts[part]; 732 struct mbr_sector eboot; 733 int p; 734 static int dumped = 0; 735 736 if (partp->mbrp_type == 0 && v_flag < 2) { 737 printf("<UNUSED>\n"); 738 return; 739 } 740 741 start = le32toh(partp->mbrp_start); 742 size = le32toh(partp->mbrp_size); 743 if (MBR_IS_EXTENDED(partp->mbrp_type)) 744 start += exoffset; 745 else 746 start += offset; 747 748 printf("%s (sysid %d)\n", get_type(partp->mbrp_type), partp->mbrp_type); 749 #ifdef BOOTSEL 750 if (le16toh(boot->mbr_bootsel_magic) == MBR_BS_MAGIC && 751 boot->mbr_bootsel.mbrbs_nametab[part][0]) 752 printf("%*s bootmenu: %s\n", indent, "", 753 boot->mbr_bootsel.mbrbs_nametab[part]); 754 #endif 755 756 printf("%*s start %"PRIdaddr", size %"PRIdaddr, 757 indent, "", start, size); 758 if (size != 0) { 759 printf(" (%u MB, Cyls ", SEC_TO_MB(size)); 760 if (v_flag == 0 && le32toh(partp->mbrp_start) == dos_sectors) 761 pr_cyls(start - dos_sectors); 762 else 763 pr_cyls(start); 764 printf("-"); 765 pr_cyls(start + size); 766 printf(")"); 767 } 768 769 switch (partp->mbrp_flag) { 770 case 0: 771 break; 772 case MBR_PFLAG_ACTIVE: 773 printf(", Active"); 774 break; 775 default: 776 printf(", flag 0x%x", partp->mbrp_flag); 777 break; 778 } 779 printf("\n"); 780 781 if (v_flag) { 782 printf("%*s beg: cylinder %4d, head %3d, sector %2d\n", 783 indent, "", 784 MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect), 785 partp->mbrp_shd, MBR_PSECT(partp->mbrp_ssect)); 786 printf("%*s end: cylinder %4d, head %3d, sector %2d\n", 787 indent, "", 788 MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect), 789 partp->mbrp_ehd, MBR_PSECT(partp->mbrp_esect)); 790 } 791 792 if (!MBR_IS_EXTENDED(partp->mbrp_type) || 793 (v_flag <= 2 && !ext.is_corrupt)) 794 return; 795 796 /* 797 * Recursive dump extended table, 798 * This is read from the disk - so is wrong during editing. 799 * Just ensure we only show it once. 800 */ 801 if (dumped) 802 return; 803 804 printf("%*s Extended partition table:\n", indent, ""); 805 indent += 4; 806 if (read_s0(start, &eboot) == -1) 807 return; 808 for (p = 0; p < MBR_PART_COUNT; p++) { 809 printf("%*s%d: ", indent, "", p); 810 print_mbr_partition(&eboot, p, start, 811 exoffset ? exoffset : start, indent); 812 } 813 814 if (exoffset == 0) 815 dumped = 1; 816 } 817 818 int 819 read_boot(const char *name, void *buf, size_t len, int err_exit) 820 { 821 int bfd, ret; 822 struct stat st; 823 824 if (boot_path != NULL) 825 free(boot_path); 826 if (strchr(name, '/') == 0) 827 asprintf(&boot_path, "%s/%s", boot_dir, name); 828 else 829 boot_path = strdup(name); 830 if (boot_path == NULL) 831 err(1, "Malloc failed"); 832 833 if ((bfd = open(boot_path, O_RDONLY)) < 0 || fstat(bfd, &st) == -1) { 834 warn("%s", boot_path); 835 goto fail; 836 } 837 838 if (st.st_size > (off_t)len) { 839 warnx("%s: bootcode too large", boot_path); 840 goto fail; 841 } 842 ret = st.st_size; 843 if (ret < 0x200) { 844 warnx("%s: bootcode too small", boot_path); 845 goto fail; 846 } 847 if (read(bfd, buf, len) != ret) { 848 warn("%s", boot_path); 849 goto fail; 850 } 851 852 /* 853 * Do some sanity checking here 854 */ 855 if (le16toh(((struct mbr_sector *)buf)->mbr_magic) != MBR_MAGIC) { 856 warnx("%s: invalid magic", boot_path); 857 goto fail; 858 } 859 860 close(bfd); 861 ret = (ret + 0x1ff) & ~0x1ff; 862 return ret; 863 864 fail: 865 close(bfd); 866 if (err_exit) 867 exit(1); 868 return 0; 869 } 870 871 void 872 init_sector0(int zappart) 873 { 874 int i; 875 int copy_size = MBR_PART_OFFSET; 876 877 #ifdef DEFAULT_BOOTCODE 878 if (bootsize == 0) 879 bootsize = read_boot(DEFAULT_BOOTCODE, bootcode, 880 sizeof bootcode, 1); 881 #endif 882 #ifdef BOOTSEL 883 if (le16toh(mboot.mbr_bootsel_magic) == MBR_BS_MAGIC 884 && le16toh(bootcode[0].mbr_bootsel_magic) == MBR_BS_MAGIC) 885 copy_size = MBR_BS_OFFSET; 886 #endif 887 888 if (bootsize != 0) { 889 boot_installed = 1; 890 memcpy(&mboot, bootcode, copy_size); 891 } 892 mboot.mbr_magic = htole16(MBR_MAGIC); 893 894 if (!zappart) 895 return; 896 for (i = 0; i < MBR_PART_COUNT; i++) 897 memset(&mboot.mbr_parts[i], 0, sizeof(mboot.mbr_parts[i])); 898 } 899 900 void 901 get_extended_ptn(void) 902 { 903 struct mbr_partition *mp; 904 struct mbr_sector *boot; 905 daddr_t offset; 906 struct mbr_sector *nptn; 907 908 /* find first (there should only be one) extended partition */ 909 for (mp = mboot.mbr_parts; !MBR_IS_EXTENDED(mp->mbrp_type); mp++) 910 if (mp >= &mboot.mbr_parts[MBR_PART_COUNT]) 911 return; 912 913 /* 914 * The extended partition should be structured as a linked list 915 * (even though it appears, at first glance, to be a tree). 916 */ 917 ext.base = le32toh(mp->mbrp_start); 918 ext.limit = ext.base + le32toh(mp->mbrp_size); 919 ext.ptn_id = mp - mboot.mbr_parts; 920 for (offset = 0;; offset = le32toh(boot->mbr_parts[1].mbrp_start)) { 921 nptn = realloc(ext.ptn, (ext.num_ptn + 1) * sizeof *ext.ptn); 922 if (nptn == NULL) 923 err(1, "Malloc failed"); 924 ext.ptn = nptn; 925 boot = ext.ptn + ext.num_ptn; 926 if (read_s0(offset + ext.base, boot) == -1) 927 break; 928 /* expect p0 to be valid and p1 to be another extended ptn */ 929 if (MBR_IS_EXTENDED(boot->mbr_parts[0].mbrp_type)) 930 break; 931 if (boot->mbr_parts[1].mbrp_type != 0 && 932 !MBR_IS_EXTENDED(boot->mbr_parts[1].mbrp_type)) 933 break; 934 /* p2 and p3 should be unallocated */ 935 if (boot->mbr_parts[2].mbrp_type != 0 || 936 boot->mbr_parts[3].mbrp_type != 0) 937 break; 938 /* data ptn inside extended one */ 939 if (boot->mbr_parts[0].mbrp_type != 0 && 940 offset + le32toh(boot->mbr_parts[0].mbrp_start) 941 + le32toh(boot->mbr_parts[0].mbrp_size) > ext.limit) 942 break; 943 944 ext.num_ptn++; 945 946 if (boot->mbr_parts[1].mbrp_type == 0) 947 /* end of extended partition chain */ 948 return; 949 /* must be in sector order */ 950 if (offset >= le32toh(boot->mbr_parts[1].mbrp_start)) 951 break; 952 } 953 954 warnx("Extended partition table is corrupt\n"); 955 ext.is_corrupt = 1; 956 ext.num_ptn = 0; 957 } 958 959 #if defined(__i386__) || defined(__x86_64__) 960 961 void 962 get_diskname(const char *fullname, char *diskname, size_t size) 963 { 964 const char *p, *p2; 965 size_t len; 966 967 p = strrchr(fullname, '/'); 968 if (p == NULL) 969 p = fullname; 970 else 971 p++; 972 973 if (*p == 0) { 974 strlcpy(diskname, fullname, size); 975 return; 976 } 977 978 if (*p == 'r') 979 p++; 980 981 for (p2 = p; *p2 != 0; p2++) 982 if (isdigit(*p2)) 983 break; 984 if (*p2 == 0) { 985 /* XXX invalid diskname? */ 986 strlcpy(diskname, fullname, size); 987 return; 988 } 989 while (isdigit(*p2)) 990 p2++; 991 992 len = p2 - p; 993 if (len > size) { 994 /* XXX */ 995 strlcpy(diskname, fullname, size); 996 return; 997 } 998 999 memcpy(diskname, p, len); 1000 diskname[len] = 0; 1001 } 1002 1003 void 1004 get_geometry(void) 1005 { 1006 int mib[2], i; 1007 size_t len; 1008 struct biosdisk_info *bip; 1009 struct nativedisk_info *nip; 1010 char diskname[8]; 1011 1012 mib[0] = CTL_MACHDEP; 1013 mib[1] = CPU_DISKINFO; 1014 if (sysctl(mib, 2, NULL, &len, NULL, 0) < 0) { 1015 intuit_translated_geometry(); 1016 return; 1017 } 1018 dl = (struct disklist *) malloc(len); 1019 sysctl(mib, 2, dl, &len, NULL, 0); 1020 1021 get_diskname(disk, diskname, sizeof diskname); 1022 1023 for (i = 0; i < dl->dl_nnativedisks; i++) { 1024 nip = &dl->dl_nativedisks[i]; 1025 if (strcmp(diskname, nip->ni_devname)) 1026 continue; 1027 /* 1028 * XXX listing possible matches is better. This is ok for 1029 * now because the user has a chance to change it later. 1030 * Also, if all the disks have the same parameters then we can 1031 * just use them, we don't need to know which disk is which. 1032 */ 1033 if (nip->ni_nmatches != 0) { 1034 bip = &dl->dl_biosdisks[nip->ni_biosmatches[0]]; 1035 dos_cylinders = bip->bi_cyl; 1036 dos_heads = bip->bi_head; 1037 dos_sectors = bip->bi_sec; 1038 if (bip->bi_lbasecs) 1039 dos_disksectors = bip->bi_lbasecs; 1040 return; 1041 } 1042 } 1043 /* Allright, allright, make a stupid guess.. */ 1044 intuit_translated_geometry(); 1045 } 1046 #endif 1047 1048 #ifdef BOOTSEL 1049 daddr_t 1050 get_default_boot(void) 1051 { 1052 uint id; 1053 int p; 1054 1055 if (le16toh(mboot.mbr_bootsel_magic) != MBR_BS_MAGIC) 1056 /* default to first active partition */ 1057 return DEFAULT_ACTIVE; 1058 1059 if (mboot.mbr_bootsel.mbrbs_defkey == SCAN_ENTER) 1060 return DEFAULT_ACTIVE; 1061 1062 id = mboot.mbr_bootsel.mbrbs_defkey; 1063 1064 /* 1+ => allocated partition id, F1+ => disk 0+ */ 1065 if (id >= SCAN_F1) 1066 return id - SCAN_F1; 1067 id -= SCAN_1; 1068 1069 for (p = 0; p < MBR_PART_COUNT; p++) { 1070 if (mboot.mbr_parts[p].mbrp_type == 0) 1071 continue; 1072 if (mboot.mbr_bootsel.mbrbs_nametab[p][0] == 0) 1073 continue; 1074 if (id-- == 0) 1075 return le32toh(mboot.mbr_parts[p].mbrp_start); 1076 } 1077 1078 for (p = 0; p < ext.num_ptn; p++) { 1079 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1080 continue; 1081 if (ext.ptn[p].mbr_bootsel.mbrbs_nametab[0][0] == 0) 1082 continue; 1083 if (id-- == 0) 1084 return ext_offset(p) 1085 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start); 1086 } 1087 1088 return DEFAULT_ACTIVE; 1089 } 1090 1091 void 1092 set_default_boot(daddr_t default_ptn) 1093 { 1094 int p; 1095 int key = SCAN_1; 1096 1097 if (le16toh(mboot.mbr_bootsel_magic) != MBR_BS_MAGIC) 1098 /* sanity */ 1099 return; 1100 1101 if (default_ptn == DEFAULT_ACTIVE) { 1102 mboot.mbr_bootsel.mbrbs_defkey = SCAN_ENTER; 1103 return; 1104 } 1105 1106 for (p = 0; p < MBR_PART_COUNT; p++) { 1107 if (mboot.mbr_parts[p].mbrp_type == 0) 1108 continue; 1109 if (mboot.mbr_bootsel.mbrbs_nametab[p][0] == 0) 1110 continue; 1111 if (le32toh(mboot.mbr_parts[p].mbrp_start) == default_ptn) { 1112 mboot.mbr_bootsel.mbrbs_defkey = key; 1113 return; 1114 } 1115 key++; 1116 } 1117 1118 if (mboot.mbr_bootsel.mbrbs_flags & MBR_BS_EXTLBA) { 1119 for (p = 0; p < ext.num_ptn; p++) { 1120 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1121 continue; 1122 if (ext.ptn[p].mbr_bootsel.mbrbs_nametab[0][0] == 0) 1123 continue; 1124 if (le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) + 1125 ext_offset(p) == default_ptn) { 1126 mboot.mbr_bootsel.mbrbs_defkey = key; 1127 return; 1128 } 1129 key++; 1130 } 1131 } 1132 1133 if (default_ptn < 8) { 1134 key = SCAN_F1; 1135 mboot.mbr_bootsel.mbrbs_defkey = key + default_ptn; 1136 return; 1137 } 1138 1139 /* Default to first active partition */ 1140 mboot.mbr_bootsel.mbrbs_defkey = SCAN_ENTER; 1141 } 1142 1143 void 1144 install_bootsel(int needed) 1145 { 1146 struct mbr_bootsel *mbs = &mboot.mbr_bootsel; 1147 int p; 1148 int ext13 = 0; 1149 char *code; 1150 1151 needed |= MBR_BS_NEWMBR; /* need new bootsel code */ 1152 1153 /* Work out which boot code we need for this configuration */ 1154 for (p = 0; p < MBR_PART_COUNT; p++) { 1155 if (mboot.mbr_parts[p].mbrp_type == 0) 1156 continue; 1157 if (le16toh(mboot.mbr_bootsel_magic) != MBR_BS_MAGIC) 1158 break; 1159 if (mbs->mbrbs_nametab[p][0] == 0) 1160 continue; 1161 needed |= MBR_BS_ACTIVE; 1162 if (le32toh(mboot.mbr_parts[p].mbrp_start) >= dos_totalsectors) 1163 ext13 = MBR_BS_EXTINT13; 1164 } 1165 1166 for (p = 0; p < ext.num_ptn; p++) { 1167 if (le16toh(ext.ptn[p].mbr_bootsel_magic) != MBR_BS_MAGIC) 1168 continue; 1169 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1170 continue; 1171 if (ext.ptn[p].mbr_bootsel.mbrbs_nametab[p][0] == 0) 1172 continue; 1173 needed |= MBR_BS_EXTLBA | MBR_BS_ACTIVE; 1174 } 1175 1176 if (B_flag) 1177 needed |= MBR_BS_ACTIVE; 1178 1179 /* Is the installed code good enough ? */ 1180 if (!i_flag && (needed == 0 || 1181 (le16toh(mboot.mbr_bootsel_magic) == MBR_BS_MAGIC 1182 && (mbs->mbrbs_flags & needed) == needed))) { 1183 /* yes - just set flags */ 1184 mbs->mbrbs_flags |= ext13; 1185 return; 1186 } 1187 1188 /* ok - we need to replace the bootcode */ 1189 1190 if (f_flag && !(i_flag || B_flag)) { 1191 warnx("Installed bootfile doesn't support required options."); 1192 return; 1193 } 1194 1195 if (!f_flag && bootsize == 0 && !i_flag) 1196 /* Output an explanation for the 'update bootcode' prompt. */ 1197 printf("\n%s\n", 1198 "Installed bootfile doesn't support required options."); 1199 1200 /* Were we told a specific file ? (which we have already read) */ 1201 /* If so check that it supports what we need. */ 1202 if (bootsize != 0 && needed != 0 1203 && (le16toh(bootcode[0].mbr_bootsel_magic) != MBR_BS_MAGIC 1204 || ((bootcode[0].mbr_bootsel.mbrbs_flags & needed) != needed))) { 1205 /* No it doesn't... */ 1206 if (f_flag) 1207 warnx("Bootfile %s doesn't support " 1208 "required bootsel options", boot_path ); 1209 /* But install it anyway */ 1210 else 1211 if (yesno("Bootfile %s doesn't support the required " 1212 "options,\ninstall default bootfile instead?", 1213 boot_path)) 1214 bootsize = 0; 1215 } 1216 1217 if (bootsize == 0) { 1218 /* Get name of bootfile that supports the required facilities */ 1219 code = DEFAULT_BOOTCODE; 1220 if (needed & MBR_BS_ACTIVE) 1221 code = DEFAULT_BOOTSELCODE; 1222 #ifdef DEFAULT_BOOTEXTCODE 1223 if (needed & MBR_BS_EXTLBA) 1224 code = DEFAULT_BOOTEXTCODE; 1225 #endif 1226 1227 bootsize = read_boot(code, bootcode, sizeof bootcode, 0); 1228 if (bootsize == 0) 1229 /* The old bootcode is better than no bootcode at all */ 1230 return; 1231 if ((bootcode[0].mbr_bootsel.mbrbs_flags & needed) != needed) 1232 warnx("Default bootfile %s doesn't support required " 1233 "options. Got flags 0x%x, wanted 0x%x\n", 1234 boot_path, bootcode[0].mbr_bootsel.mbrbs_flags, 1235 needed); 1236 } 1237 1238 if (!f_flag && !yesno("Update the bootcode from %s?", boot_path)) 1239 return; 1240 1241 init_sector0(0); 1242 1243 if (le16toh(mboot.mbr_bootsel_magic) == MBR_BS_MAGIC) 1244 mbs->mbrbs_flags = bootcode[0].mbr_bootsel.mbrbs_flags | ext13; 1245 } 1246 1247 daddr_t 1248 configure_bootsel(daddr_t default_ptn) 1249 { 1250 struct mbr_bootsel *mbs = &mboot.mbr_bootsel; 1251 int i, item, opt; 1252 int tmo; 1253 daddr_t *off; 1254 int num_bios_disks; 1255 1256 if (dl != NULL) { 1257 num_bios_disks = dl->dl_nbiosdisks; 1258 if (num_bios_disks > 8) 1259 num_bios_disks = 8; 1260 } else 1261 num_bios_disks = 8; 1262 1263 printf("\nBoot selector configuration:\n"); 1264 1265 /* The timeout value is in ticks, ~18.2 Hz. Avoid using floats. 1266 * Ticks are nearly 64k/3600 - so our long timers are sligtly out! 1267 * Newer bootcode always waits for 1 tick, so treats 0xffff 1268 * as wait forever. 1269 */ 1270 tmo = le16toh(mbs->mbrbs_timeo); 1271 tmo = tmo == 0xffff ? -1 : (10 * tmo + 9) / 182; 1272 tmo = decimal("Timeout value (0 to 3600 seconds, -1 => never)", 1273 tmo, 0, -1, 3600); 1274 mbs->mbrbs_timeo = htole16(tmo == -1 ? 0xffff : (tmo * 182) / 10); 1275 1276 off = calloc(1 + MBR_PART_COUNT + ext.num_ptn + num_bios_disks, sizeof *off); 1277 if (off == NULL) 1278 err(1, "Malloc failed"); 1279 1280 printf("Select the default boot option. Options are:\n\n"); 1281 item = 0; 1282 opt = 0; 1283 off[opt] = DEFAULT_ACTIVE; 1284 printf("%d: The first active partition\n", opt); 1285 for (i = 0; i < MBR_PART_COUNT; i++) { 1286 if (mboot.mbr_parts[i].mbrp_type == 0) 1287 continue; 1288 if (mbs->mbrbs_nametab[i][0] == 0) 1289 continue; 1290 printf("%d: %s\n", ++opt, &mbs->mbrbs_nametab[i][0]); 1291 off[opt] = le32toh(mboot.mbr_parts[i].mbrp_start); 1292 if (off[opt] == default_ptn) 1293 item = opt; 1294 } 1295 if (mbs->mbrbs_flags & MBR_BS_EXTLBA) { 1296 for (i = 0; i < ext.num_ptn; i++) { 1297 if (ext.ptn[i].mbr_parts[0].mbrp_type == 0) 1298 continue; 1299 if (ext.ptn[i].mbr_bootsel.mbrbs_nametab[0][0] == 0) 1300 continue; 1301 printf("%d: %s\n", 1302 ++opt, ext.ptn[i].mbr_bootsel.mbrbs_nametab[0]); 1303 off[opt] = ext_offset(i) + 1304 le32toh(ext.ptn[i].mbr_parts[0].mbrp_start); 1305 if (off[opt] == default_ptn) 1306 item = opt; 1307 } 1308 } 1309 for (i = 0; i < num_bios_disks; i++) { 1310 printf("%d: Harddisk %d\n", ++opt, i); 1311 off[opt] = i; 1312 if (i == default_ptn) 1313 item = opt; 1314 } 1315 1316 item = decimal("Default boot option", item, 0, 0, opt); 1317 1318 default_ptn = off[item]; 1319 free(off); 1320 return default_ptn; 1321 } 1322 #endif /* BOOTSEL */ 1323 1324 1325 /* Prerequisite: the disklabel parameters and master boot record must 1326 * have been read (i.e. dos_* and mboot are meaningful). 1327 * Specification: modifies dos_cylinders, dos_heads, dos_sectors, and 1328 * dos_cylindersectors to be consistent with what the 1329 * partition table is using, if we can find a geometry 1330 * which is consistent with all partition table entries. 1331 * We may get the number of cylinders slightly wrong (in 1332 * the conservative direction). The idea is to be able 1333 * to create a NetBSD partition on a disk we don't know 1334 * the translated geometry of. 1335 * This routine is only used for non-x86 systems or when we fail to 1336 * get the BIOS geometry from the kernel. 1337 */ 1338 void 1339 intuit_translated_geometry(void) 1340 { 1341 int xcylinders = -1, xheads = -1, xsectors = -1, i, j; 1342 uint c1, h1, s1, c2, h2, s2; 1343 ulong a1, a2; 1344 uint64_t num, denom; 1345 1346 /* 1347 * The physical parameters may be invalid as bios geometry. 1348 * If we cannot determine the actual bios geometry, we are 1349 * better off picking a likely 'faked' geometry than leaving 1350 * the invalid physical one. 1351 */ 1352 1353 if (dos_cylinders > MAXCYL || dos_heads > MAXHEAD || 1354 dos_sectors > MAXSECTOR) { 1355 h1 = MAXHEAD - 1; 1356 c1 = MAXCYL - 1; 1357 #if defined(__i386__) || defined(__x86_64__) 1358 if (dl != NULL) { 1359 /* BIOS may use 256 heads or 1024 cylinders */ 1360 for (i = 0; i < dl->dl_nbiosdisks; i++) { 1361 if (h1 < dl->dl_biosdisks[i].bi_head) 1362 h1 = dl->dl_biosdisks[i].bi_head; 1363 if (c1 < dl->dl_biosdisks[i].bi_cyl) 1364 c1 = dl->dl_biosdisks[i].bi_cyl; 1365 } 1366 } 1367 #endif 1368 dos_sectors = MAXSECTOR; 1369 dos_heads = h1; 1370 dos_cylinders = disklabel.d_secperunit / (MAXSECTOR * h1); 1371 if (dos_cylinders > c1) 1372 dos_cylinders = c1; 1373 } 1374 1375 /* Try to deduce the number of heads from two different mappings. */ 1376 for (i = 0; i < MBR_PART_COUNT * 2 - 1; i++) { 1377 if (get_mapping(i, &c1, &h1, &s1, &a1) < 0) 1378 continue; 1379 for (j = i + 1; j < MBR_PART_COUNT * 2; j++) { 1380 if (get_mapping(j, &c2, &h2, &s2, &a2) < 0) 1381 continue; 1382 a1 -= s1; 1383 a2 -= s2; 1384 num = (uint64_t)h1 * a2 - (uint64_t)h2 * a1; 1385 denom = (uint64_t)c2 * a1 - (uint64_t)c1 * a2; 1386 if (denom != 0 && num % denom == 0) { 1387 xheads = num / denom; 1388 xsectors = a1 / (c1 * xheads + h1); 1389 break; 1390 } 1391 } 1392 if (xheads != -1) 1393 break; 1394 } 1395 1396 if (xheads == -1) 1397 return; 1398 1399 /* Estimate the number of cylinders. */ 1400 xcylinders = disklabel.d_secperunit / xheads / xsectors; 1401 if (disklabel.d_secperunit > xcylinders * xheads * xsectors) 1402 xcylinders++; 1403 1404 /* 1405 * Now verify consistency with each of the partition table entries. 1406 * Be willing to shove cylinders up a little bit to make things work, 1407 * but translation mismatches are fatal. 1408 */ 1409 for (i = 0; i < MBR_PART_COUNT * 2; i++) { 1410 if (get_mapping(i, &c1, &h1, &s1, &a1) < 0) 1411 continue; 1412 if (c1 >= MAXCYL - 2) 1413 continue; 1414 if (xsectors * (c1 * xheads + h1) + s1 != a1) 1415 return; 1416 } 1417 1418 1419 /* Everything checks out. 1420 * Reset the geometry to use for further calculations. 1421 * But cylinders cannot be > 1024. 1422 */ 1423 if (xcylinders > MAXCYL) 1424 dos_cylinders = MAXCYL; 1425 else 1426 dos_cylinders = xcylinders; 1427 dos_heads = xheads; 1428 dos_sectors = xsectors; 1429 } 1430 1431 /* 1432 * For the purposes of intuit_translated_geometry(), treat the partition 1433 * table as a list of eight mapping between (cylinder, head, sector) 1434 * triplets and absolute sectors. Get the relevant geometry triplet and 1435 * absolute sectors for a given entry, or return -1 if it isn't present. 1436 * Note: for simplicity, the returned sector is 0-based. 1437 */ 1438 int 1439 get_mapping(int i, uint *cylinder, uint *head, uint *sector, 1440 unsigned long *absolute) 1441 { 1442 struct mbr_partition *part = &mboot.mbr_parts[i / 2]; 1443 1444 if (part->mbrp_type == 0) 1445 return -1; 1446 if (i % 2 == 0) { 1447 *cylinder = MBR_PCYL(part->mbrp_scyl, part->mbrp_ssect); 1448 *head = part->mbrp_shd; 1449 *sector = MBR_PSECT(part->mbrp_ssect) - 1; 1450 *absolute = le32toh(part->mbrp_start); 1451 } else { 1452 *cylinder = MBR_PCYL(part->mbrp_ecyl, part->mbrp_esect); 1453 *head = part->mbrp_ehd; 1454 *sector = MBR_PSECT(part->mbrp_esect) - 1; 1455 *absolute = le32toh(part->mbrp_start) 1456 + le32toh(part->mbrp_size) - 1; 1457 } 1458 /* Sanity check the data against max values */ 1459 if ((((*cylinder * MAXHEAD) + *head) * MAXSECTOR + *sector) < *absolute) 1460 /* cannot be a CHS mapping */ 1461 return -1; 1462 return 0; 1463 } 1464 1465 static void 1466 delete_ptn(int part) 1467 { 1468 if (part == ext.ptn_id) { 1469 /* forget all about the extended partition */ 1470 free(ext.ptn); 1471 memset(&ext, 0, sizeof ext); 1472 } 1473 1474 mboot.mbr_parts[part].mbrp_type = 0; 1475 } 1476 1477 static void 1478 delete_ext_ptn(int part) 1479 { 1480 1481 if (part == 0) { 1482 ext.ptn[0].mbr_parts[0].mbrp_type = 0; 1483 return; 1484 } 1485 ext.ptn[part - 1].mbr_parts[1] = ext.ptn[part].mbr_parts[1]; 1486 memmove(&ext.ptn[part], &ext.ptn[part + 1], 1487 (ext.num_ptn - part - 1) * sizeof ext.ptn[0]); 1488 ext.num_ptn--; 1489 } 1490 1491 static int 1492 add_ext_ptn(daddr_t start, daddr_t size) 1493 { 1494 int part; 1495 struct mbr_partition *partp; 1496 struct mbr_sector *nptn; 1497 1498 nptn = realloc(ext.ptn, (ext.num_ptn + 1) * sizeof *ext.ptn); 1499 if (!nptn) 1500 err(1, "realloc"); 1501 ext.ptn = nptn; 1502 for (part = 0; part < ext.num_ptn; part++) 1503 if (ext_offset(part) > start) 1504 break; 1505 /* insert before 'part' - make space... */ 1506 memmove(&ext.ptn[part + 1], &ext.ptn[part], 1507 (ext.num_ptn - part) * sizeof ext.ptn[0]); 1508 memset(&ext.ptn[part], 0, sizeof ext.ptn[0]); 1509 ext.ptn[part].mbr_magic = htole16(MBR_MAGIC); 1510 /* we will be 'part' */ 1511 if (part == 0) { 1512 /* link us to 'next' */ 1513 partp = &ext.ptn[0].mbr_parts[1]; 1514 /* offset will be fixed by caller */ 1515 partp->mbrp_size = htole32( 1516 le32toh(ext.ptn[1].mbr_parts[0].mbrp_start) + 1517 le32toh(ext.ptn[1].mbr_parts[0].mbrp_size)); 1518 } else { 1519 /* link us to prev's next */ 1520 partp = &ext.ptn[part - 1].mbr_parts[1]; 1521 ext.ptn[part].mbr_parts[1] = *partp; 1522 /* and prev onto us */ 1523 partp->mbrp_start = htole32(start - dos_sectors - ext.base); 1524 partp->mbrp_size = htole32(size + dos_sectors); 1525 } 1526 partp->mbrp_type = 5; /* as used by win98 */ 1527 partp->mbrp_flag = 0; 1528 /* wallop in some CHS values - win98 doesn't saturate them */ 1529 dos(le32toh(partp->mbrp_start), 1530 &partp->mbrp_scyl, &partp->mbrp_shd, &partp->mbrp_ssect); 1531 dos(le32toh(partp->mbrp_start) + le32toh(partp->mbrp_size) - 1, 1532 &partp->mbrp_ecyl, &partp->mbrp_ehd, &partp->mbrp_esect); 1533 ext.num_ptn++; 1534 1535 return part; 1536 } 1537 1538 static const char * 1539 check_overlap(int part, int sysid, daddr_t start, daddr_t size, int fix) 1540 { 1541 int p; 1542 uint p_s, p_e; 1543 1544 if (sysid != 0) { 1545 if (start < dos_sectors) 1546 return "Track zero is reserved for the BIOS"; 1547 if (start + size > disksectors) 1548 return "Partition exceeds size of disk"; 1549 for (p = 0; p < MBR_PART_COUNT; p++) { 1550 if (p == part || mboot.mbr_parts[p].mbrp_type == 0) 1551 continue; 1552 p_s = le32toh(mboot.mbr_parts[p].mbrp_start); 1553 p_e = p_s + le32toh(mboot.mbr_parts[p].mbrp_size); 1554 if (start + size <= p_s || start >= p_e) 1555 continue; 1556 if (f_flag) { 1557 if (fix) 1558 delete_ptn(p); 1559 return 0; 1560 } 1561 return "Overlaps another partition"; 1562 } 1563 } 1564 1565 /* Are we trying to create an extended partition */ 1566 if (!MBR_IS_EXTENDED(mboot.mbr_parts[part].mbrp_type)) { 1567 /* this wasn't the extended partition */ 1568 if (!MBR_IS_EXTENDED(sysid)) 1569 return 0; 1570 /* making an extended partition */ 1571 if (ext.base != 0) { 1572 if (!f_flag) 1573 return "There cannot be 2 extended partitions"; 1574 if (fix) 1575 delete_ptn(ext.ptn_id); 1576 } 1577 if (fix) { 1578 /* allocate a new extended partition */ 1579 ext.ptn = calloc(1, sizeof ext.ptn[0]); 1580 if (ext.ptn == NULL) 1581 err(1, "Malloc failed"); 1582 ext.ptn[0].mbr_magic = htole16(MBR_MAGIC); 1583 ext.ptn_id = part; 1584 ext.base = start; 1585 ext.limit = start + size; 1586 ext.num_ptn = 1; 1587 } 1588 return 0; 1589 } 1590 1591 /* Check we haven't cut space allocated to an extended ptn */ 1592 1593 if (!MBR_IS_EXTENDED(sysid)) { 1594 /* no longer an extended partition */ 1595 if (fix) { 1596 /* Kill all memory of the extended partitions */ 1597 delete_ptn(part); 1598 return 0; 1599 } 1600 if (ext.num_ptn == 0 || 1601 (ext.num_ptn == 1 && ext.ptn[0].mbr_parts[0].mbrp_type == 0)) 1602 /* nothing in extended partition */ 1603 return 0; 1604 if (f_flag) 1605 return 0; 1606 if (yesno("Do you really want to delete all the extended partitions?")) 1607 return 0; 1608 return "Extended partition busy"; 1609 } 1610 1611 if (le32toh(mboot.mbr_parts[part].mbrp_start) != ext.base) 1612 /* maybe impossible, but an extra sanity check */ 1613 return 0; 1614 1615 for (p = ext.num_ptn; --p >= 0;) { 1616 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1617 continue; 1618 p_s = ext_offset(p); 1619 p_e = p_s + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1620 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size); 1621 if (p_s >= start && p_e <= start + size) 1622 continue; 1623 if (!f_flag) 1624 return "Extended partition outside main partition"; 1625 if (fix) 1626 delete_ext_ptn(p); 1627 } 1628 1629 if (fix && start != ext.base) { 1630 /* The internal offsets need to be fixed up */ 1631 for (p = 0; p < ext.num_ptn - 1; p++) 1632 ext.ptn[p].mbr_parts[1].mbrp_start = htole32( 1633 le32toh(ext.ptn[p].mbr_parts[1].mbrp_start) 1634 + ext.base - start); 1635 /* and maybe an empty partition at the start */ 1636 if (ext.ptn[0].mbr_parts[0].mbrp_type == 0) { 1637 if (le32toh(ext.ptn[0].mbr_parts[1].mbrp_start) == 0) { 1638 /* don't need the empty slot */ 1639 memmove(&ext.ptn[0], &ext.ptn[1], 1640 (ext.num_ptn - 1) * sizeof ext.ptn[0]); 1641 ext.num_ptn--; 1642 } 1643 } else { 1644 /* must create an empty slot */ 1645 add_ext_ptn(start, dos_sectors); 1646 ext.ptn[0].mbr_parts[1].mbrp_start = htole32(ext.base 1647 - start); 1648 } 1649 } 1650 if (fix) { 1651 ext.base = start; 1652 ext.limit = start + size; 1653 } 1654 return 0; 1655 } 1656 1657 static const char * 1658 check_ext_overlap(int part, int sysid, daddr_t start, daddr_t size, int fix) 1659 { 1660 int p; 1661 uint p_s, p_e; 1662 1663 if (sysid == 0) 1664 return 0; 1665 1666 if (MBR_IS_EXTENDED(sysid)) 1667 return "Nested extended partitions are not allowed"; 1668 1669 /* allow one track at start for extended partition header */ 1670 start -= dos_sectors; 1671 size += dos_sectors; 1672 if (start < ext.base || start + size > ext.limit) 1673 return "Outside bounds of extended partition"; 1674 1675 if (f_flag && !fix) 1676 return 0; 1677 1678 for (p = ext.num_ptn; --p >= 0;) { 1679 if (p == part || ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1680 continue; 1681 p_s = ext_offset(p); 1682 p_e = p_s + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1683 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size); 1684 if (p == 0) 1685 p_s += le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1686 - dos_sectors; 1687 if (start < p_e && start + size > p_s) { 1688 if (!f_flag) 1689 return "Overlaps another extended partition"; 1690 if (fix) { 1691 if (part == -1) 1692 delete_ext_ptn(p); 1693 else 1694 /* must not change numbering yet */ 1695 ext.ptn[p].mbr_parts[0].mbrp_type = 0; 1696 } 1697 } 1698 } 1699 return 0; 1700 } 1701 1702 int 1703 change_part(int extended, int part, int sysid, daddr_t start, daddr_t size, 1704 char *bootmenu) 1705 { 1706 struct mbr_partition *partp; 1707 struct mbr_sector *boot; 1708 daddr_t offset; 1709 char *e; 1710 int upart = part; 1711 int p; 1712 int fl; 1713 daddr_t n_s, n_e; 1714 const char *errtext; 1715 #ifdef BOOTSEL 1716 char tmp_bootmenu[MBR_PART_COUNT * (MBR_BS_PARTNAMESIZE + 1)]; 1717 int bootmenu_len = (extended ? MBR_PART_COUNT : 1) * (MBR_BS_PARTNAMESIZE + 1); 1718 #endif 1719 1720 if (extended) { 1721 if (part != -1 && part < ext.num_ptn) { 1722 boot = &ext.ptn[part]; 1723 partp = &boot->mbr_parts[0]; 1724 offset = ext_offset(part); 1725 } else { 1726 part = -1; 1727 boot = 0; 1728 partp = 0; 1729 offset = 0; 1730 } 1731 upart = 0; 1732 e = "E"; 1733 } else { 1734 boot = &mboot; 1735 partp = &boot->mbr_parts[part]; 1736 offset = 0; 1737 e = ""; 1738 } 1739 1740 if (!f_flag && part != -1) { 1741 printf("The data for partition %s%d is:\n", e, part); 1742 print_part(boot, upart, offset); 1743 } 1744 1745 #ifdef BOOTSEL 1746 if (bootmenu != NULL) 1747 strlcpy(tmp_bootmenu, bootmenu, bootmenu_len); 1748 else 1749 if (boot != NULL && 1750 le16toh(boot->mbr_bootsel_magic) == MBR_BS_MAGIC) 1751 strlcpy(tmp_bootmenu, 1752 boot->mbr_bootsel.mbrbs_nametab[upart], 1753 bootmenu_len); 1754 else 1755 tmp_bootmenu[0] = 0; 1756 #endif 1757 1758 if (!s_flag && partp != NULL) { 1759 /* values not specified, default to current ones */ 1760 sysid = partp->mbrp_type; 1761 start = offset + le32toh(partp->mbrp_start); 1762 size = le32toh(partp->mbrp_size); 1763 } 1764 1765 /* creating a new partition, default to free space */ 1766 if (!s_flag && sysid == 0 && extended) { 1767 /* non-extended partition */ 1768 start = ext.base; 1769 for (p = 0; p < ext.num_ptn; p++) { 1770 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1771 continue; 1772 n_s = ext_offset(p); 1773 if (n_s > start + dos_sectors) 1774 break; 1775 start = ext_offset(p) 1776 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1777 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size); 1778 } 1779 if (ext.limit - start <= dos_sectors) { 1780 printf("No space in extended partition\n"); 1781 return 0; 1782 } 1783 start += dos_sectors; 1784 } 1785 1786 if (!s_flag && sysid == 0 && !extended) { 1787 /* same for non-extended partition */ 1788 /* first see if old start is free */ 1789 if (start < dos_sectors) 1790 start = 0; 1791 for (p = 0; start != 0 && p < MBR_PART_COUNT; p++) { 1792 if (mboot.mbr_parts[p].mbrp_type == 0) 1793 continue; 1794 n_s = le32toh(mboot.mbr_parts[p].mbrp_start); 1795 if (start >= n_s && 1796 start < n_s + le32toh(mboot.mbr_parts[p].mbrp_size)) 1797 start = 0; 1798 } 1799 if (start == 0) { 1800 /* Look for first gap */ 1801 start = dos_sectors; 1802 for (p = 0; p < MBR_PART_COUNT; p++) { 1803 if (mboot.mbr_parts[p].mbrp_type == 0) 1804 continue; 1805 n_s = le32toh(mboot.mbr_parts[p].mbrp_start); 1806 n_e = n_s + le32toh(mboot.mbr_parts[p].mbrp_size); 1807 if (start >= n_s && start < n_e) { 1808 start = n_e; 1809 p = -1; 1810 } 1811 } 1812 if (start >= disksectors) { 1813 printf("No free space\n"); 1814 return 0; 1815 } 1816 } 1817 } 1818 1819 if (!f_flag) { 1820 /* request new values from user */ 1821 if (sysid == 0) 1822 sysid = 169; 1823 sysid = decimal("sysid", sysid, 0, 0, 255); 1824 if (sysid == 0 && !v_flag) { 1825 start = 0; 1826 size = 0; 1827 #ifdef BOOTSEL 1828 tmp_bootmenu[0] = 0; 1829 #endif 1830 } else { 1831 daddr_t old = start; 1832 daddr_t lim = extended ? ext.limit : disksectors; 1833 start = decimal("start", start, 1834 DEC_SEC | DEC_RND_0 | (extended ? DEC_RND : 0), 1835 extended ? ext.base : 0, lim); 1836 /* Adjust 'size' so that end doesn't move when 'start' 1837 * is only changed slightly. 1838 */ 1839 if (size > start - old) 1840 size -= start - old; 1841 else 1842 size = 0; 1843 /* Find end of available space from this start point */ 1844 if (extended) { 1845 for (p = 0; p < ext.num_ptn; p++) { 1846 if (p == part) 1847 continue; 1848 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 1849 continue; 1850 n_s = ext_offset(p); 1851 if (n_s > start && n_s < lim) 1852 lim = n_s; 1853 if (start >= n_s && start < n_s 1854 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_start) 1855 + le32toh(ext.ptn[p].mbr_parts[0].mbrp_size)) { 1856 lim = start; 1857 break; 1858 } 1859 } 1860 } else { 1861 for (p = 0; p < MBR_PART_COUNT; p++) { 1862 if (p == part) 1863 continue; 1864 if (mboot.mbr_parts[p].mbrp_type == 0) 1865 continue; 1866 n_s = le32toh(mboot.mbr_parts[p].mbrp_start); 1867 if (n_s > start && n_s < lim) 1868 lim = n_s; 1869 if (start >= n_s && start < n_s 1870 + le32toh(mboot.mbr_parts[p].mbrp_size)) { 1871 lim = start; 1872 break; 1873 } 1874 } 1875 } 1876 lim -= start; 1877 if (lim == 0) { 1878 printf("Start sector already allocated\n"); 1879 return 0; 1880 } 1881 if (size == 0 || size > lim) 1882 size = lim; 1883 fl = DEC_SEC; 1884 if (start % dos_cylindersectors == dos_sectors) 1885 fl |= DEC_RND_DOWN; 1886 if (start == 2 * dos_sectors) 1887 fl |= DEC_RND_DOWN | DEC_RND_DOWN_2; 1888 size = decimal("size", size, fl, 0, lim); 1889 #ifdef BOOTSEL 1890 #ifndef DEFAULT_BOOTEXTCODE 1891 if (!extended) 1892 #endif 1893 string("bootmenu", bootmenu_len, tmp_bootmenu); 1894 #endif 1895 } 1896 } 1897 1898 /* 1899 * Before we write these away, we must verify that nothing 1900 * untoward has been requested. 1901 */ 1902 1903 if (extended) 1904 errtext = check_ext_overlap(part, sysid, start, size, 0); 1905 else 1906 errtext = check_overlap(part, sysid, start, size, 0); 1907 if (errtext != NULL) { 1908 if (f_flag) 1909 errx(2, "%s\n", errtext); 1910 printf("%s\n", errtext); 1911 return 0; 1912 } 1913 1914 /* 1915 * Before proceeding, delete any overlapped partitions. 1916 * This can only happen if '-f' was supplied on the command line. 1917 * Just hope the caller knows what they are doing. 1918 * This also fixes the base of each extended partition if the 1919 * partition itself has moved. 1920 */ 1921 1922 if (extended) 1923 errtext = check_ext_overlap(part, sysid, start, size, 1); 1924 else 1925 errtext = check_overlap(part, sysid, start, size, 1); 1926 1927 if (errtext) 1928 errx(1, "%s\n", errtext); 1929 1930 if (sysid == 0) { 1931 /* delete this partition - save info though */ 1932 if (partp == NULL) 1933 /* must have been trying to create an extended ptn */ 1934 return 0; 1935 if (start == 0 && size == 0) 1936 memset(partp, 0, sizeof *partp); 1937 #ifdef BOOTSEL 1938 if (le16toh(boot->mbr_bootsel_magic) == MBR_BS_MAGIC) 1939 memset(boot->mbr_bootsel.mbrbs_nametab[upart], 0, 1940 sizeof boot->mbr_bootsel.mbrbs_nametab[0]); 1941 #endif 1942 if (extended) 1943 delete_ext_ptn(part); 1944 else 1945 delete_ptn(part); 1946 return 1; 1947 } 1948 1949 1950 if (extended) { 1951 if (part != -1) 1952 delete_ext_ptn(part); 1953 if (start == ext.base + dos_sectors) 1954 /* First one must have been free */ 1955 part = 0; 1956 else 1957 part = add_ext_ptn(start, size); 1958 1959 /* These must be re-calculated because of the realloc */ 1960 boot = &ext.ptn[part]; 1961 partp = &boot->mbr_parts[0]; 1962 offset = ext_offset(part); 1963 } 1964 1965 partp->mbrp_type = sysid; 1966 partp->mbrp_start = htole32( start - offset); 1967 partp->mbrp_size = htole32( size); 1968 dos(start, &partp->mbrp_scyl, &partp->mbrp_shd, &partp->mbrp_ssect); 1969 dos(start + size - 1, 1970 &partp->mbrp_ecyl, &partp->mbrp_ehd, &partp->mbrp_esect); 1971 #ifdef BOOTSEL 1972 if (extended) { 1973 boot->mbr_bootsel_magic = htole16(MBR_BS_MAGIC); 1974 strncpy(boot->mbr_bootsel.mbrbs_nametab[upart], tmp_bootmenu, 1975 bootmenu_len); 1976 } else { 1977 /* We need to bootselect code installed in order to have 1978 * somewhere to safely write the menu tag. 1979 */ 1980 if (le16toh(boot->mbr_bootsel_magic) != MBR_BS_MAGIC) { 1981 if (yesno("The bootselect code is not installed, " 1982 "do you want to install it now?")) 1983 install_bootsel(MBR_BS_ACTIVE); 1984 } 1985 if (le16toh(boot->mbr_bootsel_magic) == MBR_BS_MAGIC) { 1986 strncpy(boot->mbr_bootsel.mbrbs_nametab[upart], 1987 tmp_bootmenu, bootmenu_len); 1988 } 1989 } 1990 #endif 1991 1992 if (v_flag && !f_flag && yesno("Explicitly specify beg/end address?")) { 1993 /* this really isn't a good idea.... */ 1994 int tsector, tcylinder, thead; 1995 1996 tcylinder = MBR_PCYL(partp->mbrp_scyl, partp->mbrp_ssect); 1997 thead = partp->mbrp_shd; 1998 tsector = MBR_PSECT(partp->mbrp_ssect); 1999 tcylinder = decimal("beginning cylinder", 2000 tcylinder, 0, 0, dos_cylinders - 1); 2001 thead = decimal("beginning head", 2002 thead, 0, 0, dos_heads - 1); 2003 tsector = decimal("beginning sector", 2004 tsector, 0, 1, dos_sectors); 2005 partp->mbrp_scyl = DOSCYL(tcylinder); 2006 partp->mbrp_shd = thead; 2007 partp->mbrp_ssect = DOSSECT(tsector, tcylinder); 2008 2009 tcylinder = MBR_PCYL(partp->mbrp_ecyl, partp->mbrp_esect); 2010 thead = partp->mbrp_ehd; 2011 tsector = MBR_PSECT(partp->mbrp_esect); 2012 tcylinder = decimal("ending cylinder", 2013 tcylinder, 0, 0, dos_cylinders - 1); 2014 thead = decimal("ending head", 2015 thead, 0, 0, dos_heads - 1); 2016 tsector = decimal("ending sector", 2017 tsector, 0, 1, dos_sectors); 2018 partp->mbrp_ecyl = DOSCYL(tcylinder); 2019 partp->mbrp_ehd = thead; 2020 partp->mbrp_esect = DOSSECT(tsector, tcylinder); 2021 } 2022 2023 /* If we had to mark an extended partition as deleted because 2024 * another request would have overlapped it, now is the time 2025 * to do the actual delete. 2026 */ 2027 if (extended && f_flag) { 2028 for (p = ext.num_ptn; --p >= 0;) 2029 if (ext.ptn[p].mbr_parts[0].mbrp_type == 0) 2030 delete_ext_ptn(p); 2031 } 2032 return 1; 2033 } 2034 2035 void 2036 print_params(void) 2037 { 2038 2039 if (sh_flag) { 2040 printf("DISK=%s\n", disk); 2041 printf("DLCYL=%d\nDLHEAD=%d\nDLSEC=%d\nDLSIZE=%"PRIdaddr"\n", 2042 cylinders, heads, sectors, disksectors); 2043 printf("BCYL=%d\nBHEAD=%d\nBSEC=%d\nBDLSIZE=%"PRIdaddr"\n", 2044 dos_cylinders, dos_heads, dos_sectors, dos_disksectors); 2045 printf("NUMEXTPTN=%d\n", ext.num_ptn); 2046 return; 2047 } 2048 2049 /* Not sh_flag */ 2050 printf("Disk: %s\n", disk); 2051 printf("NetBSD disklabel disk geometry:\n"); 2052 printf("cylinders: %d, heads: %d, sectors/track: %d " 2053 "(%d sectors/cylinder)\ntotal sectors: %"PRIdaddr"\n\n", 2054 cylinders, heads, sectors, cylindersectors, disksectors); 2055 printf("BIOS disk geometry:\n"); 2056 printf("cylinders: %d, heads: %d, sectors/track: %d " 2057 "(%d sectors/cylinder)\ntotal sectors: %"PRIdaddr"\n\n", 2058 dos_cylinders, dos_heads, dos_sectors, dos_cylindersectors, 2059 dos_disksectors); 2060 } 2061 2062 void 2063 change_active(int which) 2064 { 2065 struct mbr_partition *partp; 2066 int part; 2067 int active = MBR_PART_COUNT; 2068 2069 partp = &mboot.mbr_parts[0]; 2070 2071 if (a_flag && which != -1) 2072 active = which; 2073 else { 2074 for (part = 0; part < MBR_PART_COUNT; part++) 2075 if (partp[part].mbrp_flag & MBR_PFLAG_ACTIVE) 2076 active = part; 2077 } 2078 if (!f_flag) { 2079 if (yesno("Do you want to change the active partition?")) { 2080 printf ("Choosing %d will make no partition active.\n", 2081 MBR_PART_COUNT); 2082 do { 2083 active = decimal("active partition", 2084 active, 0, 0, MBR_PART_COUNT); 2085 } while (!yesno("Are you happy with this choice?")); 2086 } else 2087 return; 2088 } else 2089 if (active != MBR_PART_COUNT) 2090 printf ("Making partition %d active.\n", active); 2091 2092 for (part = 0; part < MBR_PART_COUNT; part++) 2093 partp[part].mbrp_flag &= ~MBR_PFLAG_ACTIVE; 2094 if (active < MBR_PART_COUNT) 2095 partp[active].mbrp_flag |= MBR_PFLAG_ACTIVE; 2096 } 2097 2098 void 2099 get_params_to_use(void) 2100 { 2101 #if defined(__i386__) || defined(__x86_64__) 2102 struct biosdisk_info *bip; 2103 int i; 2104 #endif 2105 2106 if (b_flag) { 2107 dos_cylinders = b_cyl; 2108 dos_heads = b_head; 2109 dos_sectors = b_sec; 2110 return; 2111 } 2112 2113 print_params(); 2114 if (!yesno("Do you want to change our idea of what BIOS thinks?")) 2115 return; 2116 2117 #if defined(__i386__) || defined(__x86_64__) 2118 if (dl != NULL) { 2119 for (i = 0; i < dl->dl_nbiosdisks; i++) { 2120 if (i == 0) 2121 printf("\nGeometries of known disks:\n"); 2122 bip = &dl->dl_biosdisks[i]; 2123 printf("Disk %d: cylinders %u, heads %u, sectors %u" 2124 " (%"PRIdaddr" sectors, %dMB)\n", 2125 i, bip->bi_cyl, bip->bi_head, bip->bi_sec, 2126 bip->bi_lbasecs, SEC_TO_MB(bip->bi_lbasecs)); 2127 2128 } 2129 printf("\n"); 2130 } 2131 #endif 2132 do { 2133 dos_cylinders = decimal("BIOS's idea of #cylinders", 2134 dos_cylinders, 0, 0, MAXCYL); 2135 dos_heads = decimal("BIOS's idea of #heads", 2136 dos_heads, 0, 0, MAXHEAD); 2137 dos_sectors = decimal("BIOS's idea of #sectors", 2138 dos_sectors, 0, 1, MAXSECTOR); 2139 print_params(); 2140 } while (!yesno("Are you happy with this choice?")); 2141 } 2142 2143 2144 /***********************************************\ 2145 * Change real numbers into strange dos numbers * 2146 \***********************************************/ 2147 void 2148 dos(int sector, unsigned char *cylinderp, unsigned char *headp, 2149 unsigned char *sectorp) 2150 { 2151 int cylinder, head; 2152 2153 cylinder = sector / dos_cylindersectors; 2154 sector -= cylinder * dos_cylindersectors; 2155 2156 head = sector / dos_sectors; 2157 sector -= head * dos_sectors; 2158 if (cylinder > 1023) 2159 cylinder = 1023; 2160 2161 *cylinderp = DOSCYL(cylinder); 2162 *headp = head; 2163 *sectorp = DOSSECT(sector + 1, cylinder); 2164 } 2165 2166 int 2167 open_disk(int update) 2168 { 2169 static char namebuf[MAXPATHLEN + 1]; 2170 2171 fd = opendisk(disk, update && disk_file == NULL ? O_RDWR : O_RDONLY, 2172 namebuf, sizeof(namebuf), 0); 2173 if (fd < 0) { 2174 if (errno == ENODEV) 2175 warnx("%s is not a character device", namebuf); 2176 else 2177 warn("%s", namebuf); 2178 return (-1); 2179 } 2180 disk = namebuf; 2181 if (get_params() == -1) { 2182 close(fd); 2183 fd = -1; 2184 return (-1); 2185 } 2186 if (disk_file != NULL) { 2187 /* for testing: read/write data from a disk file */ 2188 wfd = open(disk_file, update ? O_RDWR|O_CREAT : O_RDONLY, 0777); 2189 if (wfd == -1) { 2190 warn("%s", disk_file); 2191 close(fd); 2192 fd = -1; 2193 return -1; 2194 } 2195 } else 2196 wfd = fd; 2197 return (0); 2198 } 2199 2200 int 2201 read_disk(daddr_t sector, void *buf) 2202 { 2203 2204 if (*rfd == -1) 2205 errx(1, "read_disk(); fd == -1"); 2206 if (lseek(*rfd, sector * (off_t)512, 0) == -1) 2207 return (-1); 2208 return (read(*rfd, buf, 512)); 2209 } 2210 2211 int 2212 write_disk(daddr_t sector, void *buf) 2213 { 2214 2215 if (wfd == -1) 2216 errx(1, "write_disk(); wfd == -1"); 2217 if (lseek(wfd, sector * (off_t)512, 0) == -1) 2218 return (-1); 2219 return (write(wfd, buf, 512)); 2220 } 2221 2222 static void 2223 guess_geometry(daddr_t _sectors) 2224 { 2225 dos_sectors = MAXSECTOR; 2226 dos_heads = MAXHEAD - 1; /* some BIOS might use 256 */ 2227 dos_cylinders = _sectors / (MAXSECTOR * (MAXHEAD - 1)); 2228 if (dos_cylinders < 1) 2229 dos_cylinders = 1; 2230 else if (dos_cylinders > MAXCYL - 1) 2231 dos_cylinders = MAXCYL - 1; 2232 } 2233 2234 int 2235 get_params(void) 2236 { 2237 if (disk_type != NULL) { 2238 struct disklabel *tmplabel; 2239 2240 if ((tmplabel = getdiskbyname(disk_type)) == NULL) { 2241 warn("bad disktype"); 2242 return (-1); 2243 } 2244 disklabel = *tmplabel; 2245 } else if (F_flag) { 2246 struct stat st; 2247 if (fstat(fd, &st) == -1) { 2248 warn("fstat"); 2249 return (-1); 2250 } 2251 if (st.st_size % 512 != 0) { 2252 warnx("%s size (%lld) is not divisible " 2253 "by sector size (%d)", disk, (long long)st.st_size, 2254 512); 2255 } 2256 disklabel.d_secperunit = st.st_size / 512; 2257 guess_geometry(disklabel.d_secperunit); 2258 disklabel.d_ncylinders = dos_cylinders; 2259 disklabel.d_ntracks = dos_heads; 2260 disklabel.d_nsectors = dos_sectors; 2261 } else if (ioctl(fd, DIOCGDEFLABEL, &disklabel) == -1) { 2262 warn("DIOCGDEFLABEL"); 2263 if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { 2264 warn("DIOCGDINFO"); 2265 return (-1); 2266 } 2267 } 2268 disksectors = disklabel.d_secperunit; 2269 cylinders = disklabel.d_ncylinders; 2270 heads = disklabel.d_ntracks; 2271 sectors = disklabel.d_nsectors; 2272 2273 /* pick up some defaults for the BIOS sizes */ 2274 if (sectors <= MAXSECTOR) { 2275 dos_cylinders = cylinders; 2276 dos_heads = heads; 2277 dos_sectors = sectors; 2278 } else { 2279 /* guess - has to better than the above */ 2280 guess_geometry(disksectors); 2281 } 2282 dos_disksectors = disksectors; 2283 2284 return (0); 2285 } 2286 2287 int 2288 read_s0(daddr_t offset, struct mbr_sector *boot) 2289 { 2290 const char *tabletype = offset ? "extended" : "primary"; 2291 2292 if (read_disk(offset, boot) == -1) { 2293 warn("Can't read %s partition table", tabletype); 2294 return -1; 2295 } 2296 if (le16toh(boot->mbr_magic) != MBR_MAGIC) { 2297 warnx("%s partition table invalid, " 2298 "no magic in sector %"PRIdaddr, tabletype, offset); 2299 return -1; 2300 } 2301 #ifdef BOOTSEL 2302 if (le16toh(boot->mbr_bootsel_magic) == MBR_MAGIC) { 2303 /* mbr_bootsel in old location */ 2304 warnx("%s partition table: using old-style bootsel information", 2305 tabletype); 2306 memmove((u_int8_t *)boot + MBR_BS_OFFSET, 2307 (u_int8_t *)boot + MBR_BS_OFFSET + 4, 2308 sizeof(struct mbr_bootsel)); 2309 if ( ! (boot->mbr_bootsel.mbrbs_flags & MBR_BS_NEWMBR)) { 2310 /* old style default key */ 2311 int id; 2312 /* F1..F4 => ptn 0..3, F5+ => disk 0+ */ 2313 id = boot->mbr_bootsel.mbrbs_defkey; 2314 id -= SCAN_F1; 2315 if (id >= MBR_PART_COUNT) 2316 id -= MBR_PART_COUNT; /* Use number of disk */ 2317 else if (mboot.mbr_parts[id].mbrp_type != 0) 2318 id = le32toh(boot->mbr_parts[id].mbrp_start); 2319 else 2320 id = DEFAULT_ACTIVE; 2321 boot->mbr_bootsel.mbrbs_defkey = id; 2322 } 2323 boot->mbr_bootsel_magic = htole16(MBR_BS_MAGIC); 2324 /* highlight that new bootsel code is necessar */ 2325 boot->mbr_bootsel.mbrbs_flags &= ~ MBR_BS_NEWMBR; 2326 } 2327 #endif /* BOOTSEL */ 2328 return (0); 2329 } 2330 2331 int 2332 write_mbr(void) 2333 { 2334 int flag, i; 2335 daddr_t offset; 2336 int rval = -1; 2337 2338 /* 2339 * write enable label sector before write (if necessary), 2340 * disable after writing. 2341 * needed if the disklabel protected area also protects 2342 * sector 0. (e.g. empty disk) 2343 */ 2344 flag = 1; 2345 if (wfd == fd && F_flag == 0 && ioctl(wfd, DIOCWLABEL, &flag) < 0) 2346 warn("DIOCWLABEL"); 2347 if (write_disk(0, &mboot) == -1) { 2348 warn("Can't write fdisk partition table"); 2349 goto protect_label; 2350 } 2351 if (boot_installed) 2352 for (i = bootsize; (i -= 0x200) > 0;) 2353 if (write_disk(i / 0x200, &bootcode[i / 0x200]) == -1) { 2354 warn("Can't write bootcode"); 2355 goto protect_label; 2356 } 2357 for (offset = 0, i = 0; i < ext.num_ptn; i++) { 2358 if (write_disk(ext.base + offset, ext.ptn + i) == -1) { 2359 warn("Can't write %dth extended partition", i); 2360 goto protect_label; 2361 } 2362 offset = le32toh(ext.ptn[i].mbr_parts[1].mbrp_start); 2363 } 2364 rval = 0; 2365 protect_label: 2366 flag = 0; 2367 if (wfd == fd && F_flag == 0 && ioctl(wfd, DIOCWLABEL, &flag) < 0) 2368 warn("DIOCWLABEL"); 2369 return rval; 2370 } 2371 2372 int 2373 yesno(const char *str, ...) 2374 { 2375 int ch, first; 2376 va_list ap; 2377 2378 va_start(ap, str); 2379 2380 vprintf(str, ap); 2381 printf(" [n] "); 2382 2383 first = ch = getchar(); 2384 while (ch != '\n' && ch != EOF) 2385 ch = getchar(); 2386 if (ch == EOF) 2387 errx(1, "EOF"); 2388 return (first == 'y' || first == 'Y'); 2389 } 2390 2391 int 2392 decimal(const char *prompt, int dflt, int flags, int minval, int maxval) 2393 { 2394 int acc = 0; 2395 char *cp; 2396 2397 for (;;) { 2398 if (flags & DEC_SEC) { 2399 printf("%s: [%d..%dcyl default: %d, %dcyl, %uMB] ", 2400 prompt, SEC_TO_CYL(minval), SEC_TO_CYL(maxval), 2401 dflt, SEC_TO_CYL(dflt), SEC_TO_MB(dflt)); 2402 } else 2403 printf("%s: [%d..%d default: %d] ", 2404 prompt, minval, maxval, dflt); 2405 2406 if (!fgets(lbuf, LBUF, stdin)) 2407 errx(1, "EOF"); 2408 lbuf[strlen(lbuf)-1] = '\0'; 2409 cp = lbuf; 2410 2411 cp += strspn(cp, " \t"); 2412 if (*cp == '\0') 2413 return dflt; 2414 2415 if (cp[0] == '$' && cp[1] == 0) 2416 return maxval; 2417 2418 if (isdigit(*cp) || *cp == '-') { 2419 acc = strtol(lbuf, &cp, 10); 2420 if (flags & DEC_SEC) { 2421 if (*cp == 'm' || *cp == 'M') { 2422 acc *= SEC_IN_1M; 2423 /* round to whole number of cylinders */ 2424 acc += dos_cylindersectors / 2; 2425 acc /= dos_cylindersectors; 2426 cp = "c"; 2427 } 2428 if (*cp == 'c' || *cp == 'C') { 2429 cp = ""; 2430 acc *= dos_cylindersectors; 2431 /* adjustments for cylinder boundary */ 2432 if (acc == 0 && flags & DEC_RND_0) 2433 acc += dos_sectors; 2434 if (flags & DEC_RND) 2435 acc += dos_sectors; 2436 if (flags & DEC_RND_DOWN) 2437 acc -= dos_sectors; 2438 if (flags & DEC_RND_DOWN_2) 2439 acc -= dos_sectors; 2440 } 2441 } 2442 } 2443 2444 cp += strspn(cp, " \t"); 2445 if (*cp != '\0') { 2446 printf("%s is not a valid %s number.\n", lbuf, 2447 flags & DEC_SEC ? "sector" : "decimal"); 2448 continue; 2449 } 2450 2451 if (acc >= minval && acc <= maxval) 2452 return acc; 2453 printf("%d is not between %d and %d.\n", acc, minval, maxval); 2454 } 2455 } 2456 2457 int 2458 ptn_id(const char *prompt, int *extended) 2459 { 2460 uint acc = 0; 2461 char *cp; 2462 2463 for (;; printf("%s is not a valid partition number.\n", lbuf)) { 2464 printf("%s: [none] ", prompt); 2465 2466 if (!fgets(lbuf, LBUF, stdin)) 2467 errx(1, "EOF"); 2468 lbuf[strlen(lbuf)-1] = '\0'; 2469 cp = lbuf; 2470 2471 cp += strspn(cp, " \t"); 2472 *extended = 0; 2473 if (*cp == 0) 2474 return -1; 2475 2476 if (*cp == 'E' || *cp == 'e') { 2477 cp++; 2478 *extended = 1; 2479 } 2480 2481 acc = strtoul(cp, &cp, 10); 2482 2483 cp += strspn(cp, " \t"); 2484 if (*cp != '\0') 2485 continue; 2486 2487 if (*extended || acc < MBR_PART_COUNT) 2488 return acc; 2489 } 2490 } 2491 2492 #ifdef BOOTSEL 2493 void 2494 string(const char *prompt, int length, char *buf) 2495 { 2496 int len; 2497 2498 for (;;) { 2499 printf("%s: [%.*s] ", prompt, length, buf); 2500 2501 if (!fgets(lbuf, LBUF, stdin)) 2502 errx(1, "EOF"); 2503 len = strlen(lbuf); 2504 if (len <= 1) 2505 /* unchanged if just <enter> */ 2506 return; 2507 /* now strip trailing spaces, <space><enter> deletes string */ 2508 do 2509 lbuf[--len] = 0; 2510 while (len != 0 && lbuf[len - 1] == ' '); 2511 if (len < length) 2512 break; 2513 printf("'%s' is longer than %d characters.\n", 2514 lbuf, length - 1); 2515 } 2516 strncpy(buf, lbuf, length); 2517 } 2518 #endif 2519 2520 int 2521 type_match(const void *key, const void *item) 2522 { 2523 const int *typep = key; 2524 const struct part_type *ptr = item; 2525 2526 if (*typep < ptr->type) 2527 return (-1); 2528 if (*typep > ptr->type) 2529 return (1); 2530 return (0); 2531 } 2532 2533 const char * 2534 get_type(int type) 2535 { 2536 struct part_type *ptr; 2537 2538 ptr = bsearch(&type, part_types, 2539 sizeof(part_types) / sizeof(struct part_type), 2540 sizeof(struct part_type), type_match); 2541 if (ptr == 0) 2542 return ("unknown"); 2543 return (ptr->name); 2544 } 2545
Indexes created Tue Sep 23 14:10:03 GMT 2025