fdisk.c revision 79306
1/* 2 * Mach Operating System 3 * Copyright (c) 1992 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 */ 26 27#ifndef lint 28static const char rcsid[] = 29 "$FreeBSD: head/sbin/fdisk/fdisk.c 79306 2001-07-05 10:04:43Z joerg $"; 30#endif /* not lint */ 31 32#include <sys/disklabel.h> 33#include <sys/stat.h> 34#include <ctype.h> 35#include <fcntl.h> 36#include <err.h> 37#include <errno.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <string.h> 41#include <unistd.h> 42 43int iotest; 44 45#define LBUF 100 46static char lbuf[LBUF]; 47 48#define MBRSIGOFF 510 49 50/* 51 * 52 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 53 * 54 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University 55 * Copyright (c) 1989 Robert. V. Baron 56 * Created. 57 */ 58 59#define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp 60#define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp 61#define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); } 62 63#define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) 64 65#define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ 66#define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ 67int secsize = 0; /* the sensed sector size */ 68 69const char *disk; 70const char *disks[] = 71{ 72 "/dev/ad0", "/dev/da0", 0 73}; 74 75struct disklabel disklabel; /* disk parameters */ 76 77int cyls, sectors, heads, cylsecs, disksecs; 78 79struct mboot 80{ 81 unsigned char padding[2]; /* force the longs to be long aligned */ 82 unsigned char *bootinst; /* boot code */ 83 off_t bootinst_size; 84 struct dos_partition parts[4]; 85}; 86struct mboot mboot = {{0}, NULL, 0}; 87 88#define ACTIVE 0x80 89#define BOOT_MAGIC 0xAA55 90 91int dos_cyls; 92int dos_heads; 93int dos_sectors; 94int dos_cylsecs; 95 96#define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) 97#define DOSCYL(c) (c & 0xff) 98static int partition = -1; 99 100 101#define MAX_ARGS 10 102 103static int current_line_number; 104 105static int geom_processed = 0; 106static int part_processed = 0; 107static int active_processed = 0; 108 109 110typedef struct cmd { 111 char cmd; 112 int n_args; 113 struct arg { 114 char argtype; 115 int arg_val; 116 } args[MAX_ARGS]; 117} CMD; 118 119 120static int B_flag = 0; /* replace boot code */ 121static int I_flag = 0; /* use entire disk for FreeBSD */ 122static int a_flag = 0; /* set active partition */ 123static char *b_flag = NULL; /* path to boot code */ 124static int i_flag = 0; /* replace partition data */ 125static int u_flag = 0; /* update partition data */ 126static int s_flag = 0; /* Print a summary and exit */ 127static int t_flag = 0; /* test only, if f_flag is given */ 128static char *f_flag = NULL; /* Read config info from file */ 129static int v_flag = 0; /* Be verbose */ 130 131struct part_type 132{ 133 unsigned char type; 134 char *name; 135}part_types[] = 136{ 137 {0x00, "unused"} 138 ,{0x01, "Primary DOS with 12 bit FAT"} 139 ,{0x02, "XENIX / filesystem"} 140 ,{0x03, "XENIX /usr filesystem"} 141 ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"} 142 ,{0x05, "Extended DOS"} 143 ,{0x06, "Primary 'big' DOS (> 32MB)"} 144 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"} 145 ,{0x08, "AIX filesystem"} 146 ,{0x09, "AIX boot partition or Coherent"} 147 ,{0x0A, "OS/2 Boot Manager or OPUS"} 148 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"} 149 ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"} 150 ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"} 151 ,{0x0F, "Extended DOS, LBA"} 152 ,{0x10, "OPUS"} 153 ,{0x39, "plan9"} 154 ,{0x40, "VENIX 286"} 155 ,{0x4D, "QNX 4.2 Primary"} 156 ,{0x4E, "QNX 4.2 Secondary"} 157 ,{0x4F, "QNX 4.2 Tertiary"} 158 ,{0x50, "DM"} 159 ,{0x51, "DM"} 160 ,{0x52, "CP/M or Microport SysV/AT"} 161 ,{0x56, "GB"} 162 ,{0x61, "Speed"} 163 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"} 164 ,{0x64, "Novell Netware 2.xx"} 165 ,{0x65, "Novell Netware 3.xx"} 166 ,{0x75, "PCIX"} 167 ,{0x80, "Minix 1.1 ... 1.4a"} 168 ,{0x81, "Minix 1.4b ... 1.5.10"} 169 ,{0x82, "Linux swap or Solaris x86"} 170 ,{0x83, "Linux filesystem"} 171 ,{0x93, "Amoeba filesystem"} 172 ,{0x94, "Amoeba bad block table"} 173 ,{0x9F, "BSD/OS"} 174 ,{0xA0, "Suspend to Disk"} 175 ,{0xA5, "FreeBSD/NetBSD/386BSD"} 176 ,{0xA6, "OpenBSD"} 177 ,{0xA7, "NEXTSTEP"} 178 ,{0xA9, "NetBSD"} 179 ,{0xB7, "BSDI BSD/386 filesystem"} 180 ,{0xB8, "BSDI BSD/386 swap"} 181 ,{0xDB, "Concurrent CPM or C.DOS or CTOS"} 182 ,{0xE1, "Speed"} 183 ,{0xE3, "Speed"} 184 ,{0xE4, "Speed"} 185 ,{0xF1, "Speed"} 186 ,{0xF2, "DOS 3.3+ Secondary"} 187 ,{0xF4, "Speed"} 188 ,{0xFF, "BBT (Bad Blocks Table)"} 189}; 190 191static void print_s0(int which); 192static void print_part(int i); 193static void init_sector0(unsigned long start); 194static void init_boot(void); 195static void change_part(int i); 196static void print_params(); 197static void change_active(int which); 198static void change_code(); 199static void get_params_to_use(); 200static void dos(int sec, int size, unsigned char *c, unsigned char *s, 201 unsigned char *h); 202static int open_disk(int u_flag); 203static ssize_t read_disk(off_t sector, void *buf); 204static ssize_t write_disk(off_t sector, void *buf); 205static int get_params(); 206static int read_s0(); 207static int write_s0(); 208static int ok(char *str); 209static int decimal(char *str, int *num, int deflt); 210static char *get_type(int type); 211static int read_config(char *config_file); 212static void reset_boot(void); 213static int sanitize_partition(struct dos_partition *); 214static void usage(void); 215#if 0 216static int hex(char *str, int *num, int deflt); 217static int string(char *str, char **ans); 218#endif 219 220 221int 222main(int argc, char *argv[]) 223{ 224 int c, i; 225 226 while ((c = getopt(argc, argv, "BIab:f:istuv1234")) != -1) 227 switch (c) { 228 case 'B': 229 B_flag = 1; 230 break; 231 case 'I': 232 I_flag = 1; 233 break; 234 case 'a': 235 a_flag = 1; 236 break; 237 case 'b': 238 b_flag = optarg; 239 break; 240 case 'f': 241 f_flag = optarg; 242 break; 243 case 'i': 244 i_flag = 1; 245 break; 246 case 's': 247 s_flag = 1; 248 break; 249 case 't': 250 t_flag = 1; 251 break; 252 case 'u': 253 u_flag = 1; 254 break; 255 case 'v': 256 v_flag = 1; 257 break; 258 case '1': 259 case '2': 260 case '3': 261 case '4': 262 partition = c - '0'; 263 break; 264 default: 265 usage(); 266 } 267 if (f_flag || i_flag) 268 u_flag = 1; 269 if (t_flag) 270 v_flag = 1; 271 argc -= optind; 272 argv += optind; 273 274 if (argc > 0) 275 { 276 static char realname[12]; 277 278 if(strncmp(argv[0], "/dev", 4) == 0) 279 disk = argv[0]; 280 else 281 { 282 snprintf(realname, 12, "/dev/%s", argv[0]); 283 disk = realname; 284 } 285 286 if (open_disk(u_flag) < 0) 287 err(1, "cannot open disk %s", disk); 288 } 289 else 290 { 291 int rv = 0; 292 293 for(i = 0; disks[i]; i++) 294 { 295 disk = disks[i]; 296 rv = open_disk(u_flag); 297 if(rv != -2) break; 298 } 299 if(rv < 0) 300 err(1, "cannot open any disk"); 301 } 302 303 /* (abu)use mboot.bootinst to probe for the sector size */ 304 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) 305 err(1, "cannot allocate buffer to determine disk sector size"); 306 read_disk(0, mboot.bootinst); 307 free(mboot.bootinst); 308 mboot.bootinst = NULL; 309 310 if (s_flag) 311 { 312 int i; 313 struct dos_partition *partp; 314 315 if (read_s0()) 316 err(1, "read_s0"); 317 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, 318 dos_sectors); 319 printf("Part %11s %11s Type Flags\n", "Start", "Size"); 320 for (i = 0; i < NDOSPART; i++) { 321 partp = ((struct dos_partition *) &mboot.parts) + i; 322 if (partp->dp_start == 0 && partp->dp_size == 0) 323 continue; 324 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, 325 (u_long) partp->dp_start, 326 (u_long) partp->dp_size, partp->dp_typ, 327 partp->dp_flag); 328 } 329 exit(0); 330 } 331 332 printf("******* Working on device %s *******\n",disk); 333 334 if (I_flag) 335 { 336 struct dos_partition *partp; 337 338 read_s0(); 339 reset_boot(); 340 partp = (struct dos_partition *) (&mboot.parts[0]); 341 partp->dp_typ = DOSPTYP_386BSD; 342 partp->dp_flag = ACTIVE; 343 partp->dp_start = dos_sectors; 344 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - 345 dos_sectors; 346 347 dos(partp->dp_start, partp->dp_size, 348 &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); 349 dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, 350 &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); 351 if (v_flag) 352 print_s0(-1); 353 write_s0(); 354 exit(0); 355 } 356 if (f_flag) 357 { 358 if (read_s0() || i_flag) 359 { 360 reset_boot(); 361 } 362 363 if (!read_config(f_flag)) 364 { 365 exit(1); 366 } 367 if (v_flag) 368 { 369 print_s0(-1); 370 } 371 if (!t_flag) 372 { 373 write_s0(); 374 } 375 } 376 else 377 { 378 if(u_flag) 379 { 380 get_params_to_use(); 381 } 382 else 383 { 384 print_params(); 385 } 386 387 if (read_s0()) 388 init_sector0(dos_sectors); 389 390 printf("Media sector size is %d\n", secsize); 391 printf("Warning: BIOS sector numbering starts with sector 1\n"); 392 printf("Information from DOS bootblock is:\n"); 393 if (partition == -1) 394 for (i = 1; i <= NDOSPART; i++) 395 change_part(i); 396 else 397 change_part(partition); 398 399 if (u_flag || a_flag) 400 change_active(partition); 401 402 if (B_flag) 403 change_code(); 404 405 if (u_flag || a_flag || B_flag) { 406 if (!t_flag) 407 { 408 printf("\nWe haven't changed the partition table yet. "); 409 printf("This is your last chance.\n"); 410 } 411 print_s0(-1); 412 if (!t_flag) 413 { 414 if (ok("Should we write new partition table?")) 415 write_s0(); 416 } 417 else 418 { 419 printf("\n-t flag specified -- partition table not written.\n"); 420 } 421 } 422 } 423 424 exit(0); 425} 426 427static void 428usage() 429{ 430 fprintf(stderr, "%s%s", 431 "usage: fdisk [-BIaistu] [-b bootcode] [-1234] [disk]\n", 432 " fdisk -f configfile [-itv] [disk]\n"); 433 exit(1); 434} 435 436static void 437print_s0(int which) 438{ 439int i; 440 441 print_params(); 442 printf("Information from DOS bootblock is:\n"); 443 if (which == -1) 444 for (i = 1; i <= NDOSPART; i++) 445 printf("%d: ", i), print_part(i); 446 else 447 print_part(which); 448} 449 450static struct dos_partition mtpart = { 0 }; 451 452static void 453print_part(int i) 454{ 455 struct dos_partition *partp; 456 u_int64_t part_mb; 457 458 partp = ((struct dos_partition *) &mboot.parts) + i - 1; 459 460 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { 461 printf("<UNUSED>\n"); 462 return; 463 } 464 /* 465 * Be careful not to overflow. 466 */ 467 part_mb = partp->dp_size; 468 part_mb *= secsize; 469 part_mb /= (1024 * 1024); 470 printf("sysid %d,(%s)\n", partp->dp_typ, get_type(partp->dp_typ)); 471 printf(" start %lu, size %lu (%qd Meg), flag %x%s\n", 472 (u_long)partp->dp_start, 473 (u_long)partp->dp_size, 474 part_mb, 475 partp->dp_flag, 476 partp->dp_flag == ACTIVE ? " (active)" : ""); 477 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" 478 ,DPCYL(partp->dp_scyl, partp->dp_ssect) 479 ,partp->dp_shd 480 ,DPSECT(partp->dp_ssect) 481 ,DPCYL(partp->dp_ecyl, partp->dp_esect) 482 ,partp->dp_ehd 483 ,DPSECT(partp->dp_esect)); 484} 485 486 487static void 488init_boot(void) 489{ 490 const char *fname; 491 int fd, n; 492 struct stat sb; 493 494 fname = b_flag ? b_flag : "/boot/mbr"; 495 if ((fd = open(fname, O_RDONLY)) == -1 || 496 fstat(fd, &sb) == -1) 497 err(1, "%s", fname); 498 if ((mboot.bootinst_size = sb.st_size) % secsize != 0) 499 errx(1, "%s: length must be a multiple of sector size", fname); 500 if (mboot.bootinst != NULL) 501 free(mboot.bootinst); 502 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) 503 errx(1, "%s: unable to allocate read buffer", fname); 504 if ((n = read(fd, mboot.bootinst, mboot.bootinst_size)) == -1 || 505 close(fd)) 506 err(1, "%s", fname); 507 if (n != mboot.bootinst_size) 508 errx(1, "%s: short read", fname); 509} 510 511 512static void 513init_sector0(unsigned long start) 514{ 515struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[3]); 516 517 init_boot(); 518 519 partp->dp_typ = DOSPTYP_386BSD; 520 partp->dp_flag = ACTIVE; 521 start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors; 522 if(start == 0) 523 start = dos_sectors; 524 partp->dp_start = start; 525 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start; 526 527 dos(partp->dp_start, partp->dp_size, 528 &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); 529 dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, 530 &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); 531} 532 533static void 534change_part(int i) 535{ 536struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1; 537 538 printf("The data for partition %d is:\n", i); 539 print_part(i); 540 541 if (u_flag && ok("Do you want to change it?")) { 542 int tmp; 543 544 if (i_flag) { 545 bzero((char *)partp, sizeof (struct dos_partition)); 546 if (i == 4) { 547 init_sector0(1); 548 printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n"); 549 print_part(i); 550 } 551 } 552 553 do { 554 Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp); 555 Decimal("start", partp->dp_start, tmp); 556 Decimal("size", partp->dp_size, tmp); 557 558 if (ok("Explicitly specify beg/end address ?")) 559 { 560 int tsec,tcyl,thd; 561 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); 562 thd = partp->dp_shd; 563 tsec = DPSECT(partp->dp_ssect); 564 Decimal("beginning cylinder", tcyl, tmp); 565 Decimal("beginning head", thd, tmp); 566 Decimal("beginning sector", tsec, tmp); 567 partp->dp_scyl = DOSCYL(tcyl); 568 partp->dp_ssect = DOSSECT(tsec,tcyl); 569 partp->dp_shd = thd; 570 571 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); 572 thd = partp->dp_ehd; 573 tsec = DPSECT(partp->dp_esect); 574 Decimal("ending cylinder", tcyl, tmp); 575 Decimal("ending head", thd, tmp); 576 Decimal("ending sector", tsec, tmp); 577 partp->dp_ecyl = DOSCYL(tcyl); 578 partp->dp_esect = DOSSECT(tsec,tcyl); 579 partp->dp_ehd = thd; 580 } else { 581 if (!sanitize_partition(partp)) 582 partp->dp_typ = 0; 583 dos(partp->dp_start, partp->dp_size, 584 &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); 585 dos(partp->dp_start + partp->dp_size - 1, partp->dp_size, 586 &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); 587 } 588 589 print_part(i); 590 } while (!ok("Are we happy with this entry?")); 591 } 592} 593 594static void 595print_params() 596{ 597 printf("parameters extracted from in-core disklabel are:\n"); 598 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 599 ,cyls,heads,sectors,cylsecs); 600 if((dos_sectors > 63) || (dos_cyls > 1023) || (dos_heads > 255)) 601 printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); 602 printf("parameters to be used for BIOS calculations are:\n"); 603 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 604 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); 605} 606 607static void 608change_active(int which) 609{ 610int i; 611int active = 4, tmp; 612struct dos_partition *partp = ((struct dos_partition *) &mboot.parts); 613 614 if (a_flag && which != -1) 615 active = which; 616 if (!ok("Do you want to change the active partition?")) 617 return; 618setactive: 619 active = 4; 620 do { 621 Decimal("active partition", active, tmp); 622 if (active < 1 || 4 < active) { 623 printf("Active partition number must be in range 1-4." 624 " Try again.\n"); 625 goto setactive; 626 } 627 } while (!ok("Are you happy with this choice")); 628 for (i = 0; i < NDOSPART; i++) 629 partp[i].dp_flag = 0; 630 if (active > 0 && active <= NDOSPART) 631 partp[active-1].dp_flag = ACTIVE; 632} 633 634static void 635change_code() 636{ 637 if (ok("Do you want to change the boot code?")) 638 init_boot(); 639} 640 641void 642get_params_to_use() 643{ 644 int tmp; 645 print_params(); 646 if (ok("Do you want to change our idea of what BIOS thinks ?")) 647 { 648 do 649 { 650 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); 651 Decimal("BIOS's idea of #heads", dos_heads, tmp); 652 Decimal("BIOS's idea of #sectors", dos_sectors, tmp); 653 dos_cylsecs = dos_heads * dos_sectors; 654 print_params(); 655 } 656 while(!ok("Are you happy with this choice")); 657 } 658} 659 660 661/***********************************************\ 662* Change real numbers into strange dos numbers * 663\***********************************************/ 664static void 665dos(sec, size, c, s, h) 666int sec, size; 667unsigned char *c, *s, *h; 668{ 669int cy; 670int hd; 671 672 if (sec == 0 && size == 0) { 673 *s = *c = *h = 0; 674 return; 675 } 676 677 cy = sec / ( dos_cylsecs ); 678 sec = sec - cy * ( dos_cylsecs ); 679 680 hd = sec / dos_sectors; 681 sec = (sec - hd * dos_sectors) + 1; 682 683 *h = hd; 684 *c = cy & 0xff; 685 *s = (sec & 0x3f) | ( (cy & 0x300) >> 2); 686} 687 688int fd; 689 690 /* Getting device status */ 691 692static int 693open_disk(int u_flag) 694{ 695 struct stat st; 696 697 if (stat(disk, &st) == -1) { 698 if (errno == ENOENT) 699 return -2; 700 warnx("can't get file status of %s", disk); 701 return -1; 702 } 703 if ( !(st.st_mode & S_IFCHR) ) 704 warnx("device %s is not character special", disk); 705 if ((fd = open(disk, 706 a_flag || I_flag || B_flag || u_flag ? O_RDWR : O_RDONLY)) == -1) { 707 if(errno == ENXIO) 708 return -2; 709 warnx("can't open device %s", disk); 710 return -1; 711 } 712 if (get_params(0) == -1) { 713 warnx("can't get disk parameters on %s", disk); 714 return -1; 715 } 716 return fd; 717} 718 719static ssize_t 720read_disk(off_t sector, void *buf) 721{ 722 lseek(fd,(sector * 512), 0); 723 if( secsize == 0 ) 724 for( secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; secsize *= 2 ) 725 { 726 /* try the read */ 727 int size = read(fd, buf, secsize); 728 if( size == secsize ) 729 /* it worked so return */ 730 return secsize; 731 } 732 else 733 return read( fd, buf, secsize ); 734 735 /* we failed to read at any of the sizes */ 736 return -1; 737} 738 739static ssize_t 740write_disk(off_t sector, void *buf) 741{ 742 lseek(fd,(sector * 512), 0); 743 /* write out in the size that the read_disk found worked */ 744 return write(fd, buf, secsize); 745} 746 747static int 748get_params() 749{ 750 751 if (ioctl(fd, DIOCGDINFO, &disklabel) == -1) { 752 warnx("can't get disk parameters on %s; supplying dummy ones", disk); 753 dos_cyls = cyls = 1; 754 dos_heads = heads = 1; 755 dos_sectors = sectors = 1; 756 dos_cylsecs = cylsecs = heads * sectors; 757 disksecs = cyls * heads * sectors; 758 return disksecs; 759 } 760 761 dos_cyls = cyls = disklabel.d_ncylinders; 762 dos_heads = heads = disklabel.d_ntracks; 763 dos_sectors = sectors = disklabel.d_nsectors; 764 dos_cylsecs = cylsecs = heads * sectors; 765 disksecs = cyls * heads * sectors; 766 767 return (disksecs); 768} 769 770 771static int 772read_s0() 773{ 774 mboot.bootinst_size = secsize; 775 if (mboot.bootinst != NULL) 776 free(mboot.bootinst); 777 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { 778 warnx("unable to allocate buffer to read fdisk " 779 "partition table"); 780 return -1; 781 } 782 if (read_disk(0, mboot.bootinst) == -1) { 783 warnx("can't read fdisk partition table"); 784 return -1; 785 } 786 if (*(uint16_t *)&mboot.bootinst[MBRSIGOFF] != BOOT_MAGIC) { 787 warnx("invalid fdisk partition table found"); 788 /* So should we initialize things */ 789 return -1; 790 } 791 memcpy(mboot.parts, &mboot.bootinst[DOSPARTOFF], sizeof(mboot.parts)); 792 return 0; 793} 794 795static int 796write_s0() 797{ 798#ifdef NOT_NOW 799 int flag; 800#endif 801 int sector; 802 803 if (iotest) { 804 print_s0(-1); 805 return 0; 806 } 807 memcpy(&mboot.bootinst[DOSPARTOFF], mboot.parts, sizeof(mboot.parts)); 808 /* 809 * write enable label sector before write (if necessary), 810 * disable after writing. 811 * needed if the disklabel protected area also protects 812 * sector 0. (e.g. empty disk) 813 */ 814#ifdef NOT_NOW 815 flag = 1; 816 if (ioctl(fd, DIOCWLABEL, &flag) < 0) 817 warn("ioctl DIOCWLABEL"); 818#endif 819 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) 820 if (write_disk(sector, 821 &mboot.bootinst[sector * secsize]) == -1) { 822 warn("can't write fdisk partition table"); 823 return -1; 824#ifdef NOT_NOW 825 flag = 0; 826 (void) ioctl(fd, DIOCWLABEL, &flag); 827#endif 828 } 829#ifdef NOT_NOW 830 flag = 0; 831 (void) ioctl(fd, DIOCWLABEL, &flag); 832#endif 833 return(0); 834} 835 836 837static int 838ok(str) 839char *str; 840{ 841 printf("%s [n] ", str); 842 fgets(lbuf, LBUF, stdin); 843 lbuf[strlen(lbuf)-1] = 0; 844 845 if (*lbuf && 846 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || 847 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) 848 return 1; 849 else 850 return 0; 851} 852 853static int 854decimal(char *str, int *num, int deflt) 855{ 856int acc = 0, c; 857char *cp; 858 859 while (1) { 860 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); 861 fgets(lbuf, LBUF, stdin); 862 lbuf[strlen(lbuf)-1] = 0; 863 864 if (!*lbuf) 865 return 0; 866 867 cp = lbuf; 868 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 869 if (!c) 870 return 0; 871 while ((c = *cp++)) { 872 if (c <= '9' && c >= '0') 873 acc = acc * 10 + c - '0'; 874 else 875 break; 876 } 877 if (c == ' ' || c == '\t') 878 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 879 if (!c) { 880 *num = acc; 881 return 1; 882 } else 883 printf("%s is an invalid decimal number. Try again.\n", 884 lbuf); 885 } 886 887} 888 889#if 0 890static int 891hex(char *str, int *num, int deflt) 892{ 893int acc = 0, c; 894char *cp; 895 896 while (1) { 897 printf("Supply a hex value for \"%s\" [%x] ", str, deflt); 898 fgets(lbuf, LBUF, stdin); 899 lbuf[strlen(lbuf)-1] = 0; 900 901 if (!*lbuf) 902 return 0; 903 904 cp = lbuf; 905 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 906 if (!c) 907 return 0; 908 while ((c = *cp++)) { 909 if (c <= '9' && c >= '0') 910 acc = (acc << 4) + c - '0'; 911 else if (c <= 'f' && c >= 'a') 912 acc = (acc << 4) + c - 'a' + 10; 913 else if (c <= 'F' && c >= 'A') 914 acc = (acc << 4) + c - 'A' + 10; 915 else 916 break; 917 } 918 if (c == ' ' || c == '\t') 919 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 920 if (!c) { 921 *num = acc; 922 return 1; 923 } else 924 printf("%s is an invalid hex number. Try again.\n", 925 lbuf); 926 } 927 928} 929 930static int 931string(char *str, char **ans) 932{ 933int c; 934char *cp = lbuf; 935 936 while (1) { 937 printf("Supply a string value for \"%s\" [%s] ", str, *ans); 938 fgets(lbuf, LBUF, stdin); 939 lbuf[strlen(lbuf)-1] = 0; 940 941 if (!*lbuf) 942 return 0; 943 944 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 945 if (c == '"') { 946 c = *++cp; 947 *ans = cp; 948 while ((c = *cp) && c != '"') cp++; 949 } else { 950 *ans = cp; 951 while ((c = *cp) && c != ' ' && c != '\t') cp++; 952 } 953 954 if (c) 955 *cp = 0; 956 return 1; 957 } 958} 959#endif 960 961static char * 962get_type(int type) 963{ 964 int numentries = (sizeof(part_types)/sizeof(struct part_type)); 965 int counter = 0; 966 struct part_type *ptr = part_types; 967 968 969 while(counter < numentries) 970 { 971 if(ptr->type == type) 972 { 973 return(ptr->name); 974 } 975 ptr++; 976 counter++; 977 } 978 return("unknown"); 979} 980 981 982static void 983parse_config_line(line, command) 984 char *line; 985 CMD *command; 986{ 987 char *cp, *end; 988 989 cp = line; 990 while (1) /* dirty trick used to insure one exit point for this 991 function */ 992 { 993 memset(command, 0, sizeof(*command)); 994 995 while (isspace(*cp)) ++cp; 996 if (*cp == '\0' || *cp == '#') 997 { 998 break; 999 } 1000 command->cmd = *cp++; 1001 1002 /* 1003 * Parse args 1004 */ 1005 while (1) 1006 { 1007 while (isspace(*cp)) ++cp; 1008 if (*cp == '#') 1009 { 1010 break; /* found comment */ 1011 } 1012 if (isalpha(*cp)) 1013 { 1014 command->args[command->n_args].argtype = *cp++; 1015 } 1016 if (!isdigit(*cp)) 1017 { 1018 break; /* assume end of line */ 1019 } 1020 end = NULL; 1021 command->args[command->n_args].arg_val = strtol(cp, &end, 0); 1022 if (cp == end) 1023 { 1024 break; /* couldn't parse number */ 1025 } 1026 cp = end; 1027 command->n_args++; 1028 } 1029 break; 1030 } 1031} 1032 1033 1034static int 1035process_geometry(command) 1036 CMD *command; 1037{ 1038 int status = 1, i; 1039 1040 while (1) 1041 { 1042 geom_processed = 1; 1043 if (part_processed) 1044 { 1045 warnx( 1046 "ERROR line %d: the geometry specification line must occur before\n\ 1047 all partition specifications", 1048 current_line_number); 1049 status = 0; 1050 break; 1051 } 1052 if (command->n_args != 3) 1053 { 1054 warnx("ERROR line %d: incorrect number of geometry args", 1055 current_line_number); 1056 status = 0; 1057 break; 1058 } 1059 dos_cyls = -1; 1060 dos_heads = -1; 1061 dos_sectors = -1; 1062 for (i = 0; i < 3; ++i) 1063 { 1064 switch (command->args[i].argtype) 1065 { 1066 case 'c': 1067 dos_cyls = command->args[i].arg_val; 1068 break; 1069 case 'h': 1070 dos_heads = command->args[i].arg_val; 1071 break; 1072 case 's': 1073 dos_sectors = command->args[i].arg_val; 1074 break; 1075 default: 1076 warnx( 1077 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)", 1078 current_line_number, command->args[i].argtype, 1079 command->args[i].argtype); 1080 status = 0; 1081 break; 1082 } 1083 } 1084 if (status == 0) 1085 { 1086 break; 1087 } 1088 1089 dos_cylsecs = dos_heads * dos_sectors; 1090 1091 /* 1092 * Do sanity checks on parameter values 1093 */ 1094 if (dos_cyls < 0) 1095 { 1096 warnx("ERROR line %d: number of cylinders not specified", 1097 current_line_number); 1098 status = 0; 1099 } 1100 if (dos_cyls == 0 || dos_cyls > 1024) 1101 { 1102 warnx( 1103 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ 1104 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ 1105 is dedicated to FreeBSD)", 1106 current_line_number, dos_cyls); 1107 } 1108 1109 if (dos_heads < 0) 1110 { 1111 warnx("ERROR line %d: number of heads not specified", 1112 current_line_number); 1113 status = 0; 1114 } 1115 else if (dos_heads < 1 || dos_heads > 256) 1116 { 1117 warnx("ERROR line %d: number of heads must be within (1-256)", 1118 current_line_number); 1119 status = 0; 1120 } 1121 1122 if (dos_sectors < 0) 1123 { 1124 warnx("ERROR line %d: number of sectors not specified", 1125 current_line_number); 1126 status = 0; 1127 } 1128 else if (dos_sectors < 1 || dos_sectors > 63) 1129 { 1130 warnx("ERROR line %d: number of sectors must be within (1-63)", 1131 current_line_number); 1132 status = 0; 1133 } 1134 1135 break; 1136 } 1137 return (status); 1138} 1139 1140 1141static int 1142process_partition(command) 1143 CMD *command; 1144{ 1145 int status = 0, partition; 1146 u_int32_t prev_head_boundary, prev_cyl_boundary; 1147 u_int32_t adj_size, max_end; 1148 struct dos_partition *partp; 1149 1150 while (1) 1151 { 1152 part_processed = 1; 1153 if (command->n_args != 4) 1154 { 1155 warnx("ERROR line %d: incorrect number of partition args", 1156 current_line_number); 1157 break; 1158 } 1159 partition = command->args[0].arg_val; 1160 if (partition < 1 || partition > 4) 1161 { 1162 warnx("ERROR line %d: invalid partition number %d", 1163 current_line_number, partition); 1164 break; 1165 } 1166 partp = ((struct dos_partition *) &mboot.parts) + partition - 1; 1167 bzero((char *)partp, sizeof (struct dos_partition)); 1168 partp->dp_typ = command->args[1].arg_val; 1169 partp->dp_start = command->args[2].arg_val; 1170 partp->dp_size = command->args[3].arg_val; 1171 max_end = partp->dp_start + partp->dp_size; 1172 1173 if (partp->dp_typ == 0) 1174 { 1175 /* 1176 * Get out, the partition is marked as unused. 1177 */ 1178 /* 1179 * Insure that it's unused. 1180 */ 1181 bzero((char *)partp, sizeof (struct dos_partition)); 1182 status = 1; 1183 break; 1184 } 1185 1186 /* 1187 * Adjust start upwards, if necessary, to fall on an head boundary. 1188 */ 1189 if (partp->dp_start % dos_sectors != 0) 1190 { 1191 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; 1192 if (max_end < dos_sectors || 1193 prev_head_boundary > max_end - dos_sectors) 1194 { 1195 /* 1196 * Can't go past end of partition 1197 */ 1198 warnx( 1199 "ERROR line %d: unable to adjust start of partition %d to fall on\n\ 1200 a head boundary", 1201 current_line_number, partition); 1202 break; 1203 } 1204 warnx( 1205 "WARNING: adjusting start offset of partition %d\n\ 1206 from %u to %u, to fall on a head boundary", 1207 partition, (u_int)partp->dp_start, 1208 (u_int)(prev_head_boundary + dos_sectors)); 1209 partp->dp_start = prev_head_boundary + dos_sectors; 1210 } 1211 1212 /* 1213 * Adjust size downwards, if necessary, to fall on a cylinder 1214 * boundary. 1215 */ 1216 prev_cyl_boundary = 1217 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; 1218 if (prev_cyl_boundary > partp->dp_start) 1219 adj_size = prev_cyl_boundary - partp->dp_start; 1220 else 1221 { 1222 warnx( 1223 "ERROR: could not adjust partition to start on a head boundary\n\ 1224 and end on a cylinder boundary."); 1225 return (0); 1226 } 1227 if (adj_size != partp->dp_size) 1228 { 1229 warnx( 1230 "WARNING: adjusting size of partition %d from %u to %u\n\ 1231 to end on a cylinder boundary", 1232 partition, (u_int)partp->dp_size, (u_int)adj_size); 1233 partp->dp_size = adj_size; 1234 } 1235 if (partp->dp_size == 0) 1236 { 1237 warnx("ERROR line %d: size for partition %d is zero", 1238 current_line_number, partition); 1239 break; 1240 } 1241 1242 dos(partp->dp_start, partp->dp_size, 1243 &partp->dp_scyl, &partp->dp_ssect, &partp->dp_shd); 1244 dos(partp->dp_start+partp->dp_size - 1, partp->dp_size, 1245 &partp->dp_ecyl, &partp->dp_esect, &partp->dp_ehd); 1246 status = 1; 1247 break; 1248 } 1249 return (status); 1250} 1251 1252 1253static int 1254process_active(command) 1255 CMD *command; 1256{ 1257 int status = 0, partition, i; 1258 struct dos_partition *partp; 1259 1260 while (1) 1261 { 1262 active_processed = 1; 1263 if (command->n_args != 1) 1264 { 1265 warnx("ERROR line %d: incorrect number of active args", 1266 current_line_number); 1267 status = 0; 1268 break; 1269 } 1270 partition = command->args[0].arg_val; 1271 if (partition < 1 || partition > 4) 1272 { 1273 warnx("ERROR line %d: invalid partition number %d", 1274 current_line_number, partition); 1275 break; 1276 } 1277 /* 1278 * Reset active partition 1279 */ 1280 partp = ((struct dos_partition *) &mboot.parts); 1281 for (i = 0; i < NDOSPART; i++) 1282 partp[i].dp_flag = 0; 1283 partp[partition-1].dp_flag = ACTIVE; 1284 1285 status = 1; 1286 break; 1287 } 1288 return (status); 1289} 1290 1291 1292static int 1293process_line(line) 1294 char *line; 1295{ 1296 CMD command; 1297 int status = 1; 1298 1299 while (1) 1300 { 1301 parse_config_line(line, &command); 1302 switch (command.cmd) 1303 { 1304 case 0: 1305 /* 1306 * Comment or blank line 1307 */ 1308 break; 1309 case 'g': 1310 /* 1311 * Set geometry 1312 */ 1313 status = process_geometry(&command); 1314 break; 1315 case 'p': 1316 status = process_partition(&command); 1317 break; 1318 case 'a': 1319 status = process_active(&command); 1320 break; 1321 default: 1322 status = 0; 1323 break; 1324 } 1325 break; 1326 } 1327 return (status); 1328} 1329 1330 1331static int 1332read_config(config_file) 1333 char *config_file; 1334{ 1335 FILE *fp = NULL; 1336 int status = 1; 1337 char buf[1010]; 1338 1339 while (1) /* dirty trick used to insure one exit point for this 1340 function */ 1341 { 1342 if (strcmp(config_file, "-") != 0) 1343 { 1344 /* 1345 * We're not reading from stdin 1346 */ 1347 if ((fp = fopen(config_file, "r")) == NULL) 1348 { 1349 status = 0; 1350 break; 1351 } 1352 } 1353 else 1354 { 1355 fp = stdin; 1356 } 1357 current_line_number = 0; 1358 while (!feof(fp)) 1359 { 1360 if (fgets(buf, sizeof(buf), fp) == NULL) 1361 { 1362 break; 1363 } 1364 ++current_line_number; 1365 status = process_line(buf); 1366 if (status == 0) 1367 { 1368 break; 1369 } 1370 } 1371 break; 1372 } 1373 if (fp) 1374 { 1375 /* 1376 * It doesn't matter if we're reading from stdin, as we've reached EOF 1377 */ 1378 fclose(fp); 1379 } 1380 return (status); 1381} 1382 1383 1384static void 1385reset_boot(void) 1386{ 1387 int i; 1388 struct dos_partition *partp; 1389 1390 init_boot(); 1391 for (i = 0; i < 4; ++i) 1392 { 1393 partp = ((struct dos_partition *) &mboot.parts) + i; 1394 bzero((char *)partp, sizeof (struct dos_partition)); 1395 } 1396} 1397 1398static int 1399sanitize_partition(partp) 1400 struct dos_partition *partp; 1401{ 1402 u_int32_t prev_head_boundary, prev_cyl_boundary; 1403 u_int32_t adj_size, max_end; 1404 1405 max_end = partp->dp_start + partp->dp_size; 1406 1407 /* 1408 * Adjust start upwards, if necessary, to fall on an head boundary. 1409 */ 1410 if (partp->dp_start % dos_sectors != 0) { 1411 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; 1412 if (max_end < dos_sectors || 1413 prev_head_boundary > max_end - dos_sectors) { 1414 /* 1415 * Can't go past end of partition 1416 */ 1417 warnx( 1418 "ERROR: unable to adjust start of partition to fall on a head boundary"); 1419 return (0); 1420 } 1421 warnx( 1422 "WARNING: adjusting start offset of partition\n\ 1423 to %u to fall on a head boundary", 1424 (u_int)(prev_head_boundary + dos_sectors)); 1425 partp->dp_start = prev_head_boundary + dos_sectors; 1426 } 1427 1428 /* 1429 * Adjust size downwards, if necessary, to fall on a cylinder 1430 * boundary. 1431 */ 1432 prev_cyl_boundary = ((partp->dp_start + partp->dp_size) / dos_cylsecs) * 1433 dos_cylsecs; 1434 if (prev_cyl_boundary > partp->dp_start) 1435 adj_size = prev_cyl_boundary - partp->dp_start; 1436 else 1437 { 1438 warnx("ERROR: could not adjust partition to start on a head boundary\n\ 1439 and end on a cylinder boundary."); 1440 return (0); 1441 } 1442 if (adj_size != partp->dp_size) { 1443 warnx( 1444 "WARNING: adjusting size of partition to %u to end on a\n\ 1445 cylinder boundary", 1446 (u_int)adj_size); 1447 partp->dp_size = adj_size; 1448 } 1449 if (partp->dp_size == 0) { 1450 warnx("ERROR: size for partition is zero"); 1451 return (0); 1452 } 1453 1454 return (1); 1455} 1456