1 /* 2 * Mach Operating System 3 * Copyright (c) 1992 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/disk.h> 31 #include <sys/disklabel.h> 32 #include <sys/diskmbr.h> 33 #include <sys/endian.h> 34 #include <sys/param.h> 35 #include <sys/stat.h> 36 #include <sys/mount.h> 37 #include <ctype.h> 38 #include <fcntl.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <libgeom.h> 42 #include <paths.h> 43 #include <regex.h> 44 #include <stdint.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 int iotest; 51 52 #define NOSECTORS ((u_int32_t)-1) 53 #define LBUF 100 54 static char lbuf[LBUF]; 55 56 /* 57 * 58 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992 59 * 60 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University 61 * Copyright (c) 1989 Robert. V. Baron 62 * Created. 63 */ 64 65 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp 66 67 #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs) 68 69 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */ 70 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */ 71 static int secsize = 0; /* the sensed sector size */ 72 73 static char *disk; 74 75 static int cyls, sectors, heads, cylsecs, disksecs; 76 77 struct mboot { 78 unsigned char *bootinst; /* boot code */ 79 off_t bootinst_size; 80 struct dos_partition parts[NDOSPART]; 81 }; 82 83 static struct mboot mboot; 84 static int fd; 85 86 #define ACTIVE 0x80 87 88 static uint dos_cyls; 89 static uint dos_heads; 90 static uint dos_sectors; 91 static uint dos_cylsecs; 92 93 #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0)) 94 #define DOSCYL(c) (c & 0xff) 95 96 #define MAX_ARGS 10 97 98 static int current_line_number; 99 100 static int geom_processed = 0; 101 static int part_processed = 0; 102 static int active_processed = 0; 103 104 typedef struct cmd { 105 char cmd; 106 int n_args; 107 struct arg { 108 char argtype; 109 int arg_val; 110 char *arg_str; 111 } args[MAX_ARGS]; 112 } CMD; 113 114 static int B_flag = 0; /* replace boot code */ 115 static int I_flag = 0; /* use entire disk for FreeBSD */ 116 static int a_flag = 0; /* set active partition */ 117 static char *b_flag = NULL; /* path to boot code */ 118 static int i_flag = 0; /* replace partition data */ 119 static int q_flag = 0; /* Be quiet */ 120 static int u_flag = 0; /* update partition data */ 121 static int s_flag = 0; /* Print a summary and exit */ 122 static int t_flag = 0; /* test only */ 123 static char *f_flag = NULL; /* Read config info from file */ 124 static int v_flag = 0; /* Be verbose */ 125 static int print_config_flag = 0; 126 127 /* 128 * A list of partition types, probably outdated. 129 */ 130 static const char *const part_types[256] = { 131 [0x00] = "unused", 132 [0x01] = "Primary DOS with 12 bit FAT", 133 [0x02] = "XENIX / file system", 134 [0x03] = "XENIX /usr file system", 135 [0x04] = "Primary DOS with 16 bit FAT (< 32MB)", 136 [0x05] = "Extended DOS", 137 [0x06] = "Primary DOS, 16 bit FAT (>= 32MB)", 138 [0x07] = "NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX", 139 [0x08] = "AIX file system or SplitDrive", 140 [0x09] = "AIX boot partition or Coherent", 141 [0x0A] = "OS/2 Boot Manager, OPUS or Coherent swap", 142 [0x0B] = "DOS or Windows 95 with 32 bit FAT", 143 [0x0C] = "DOS or Windows 95 with 32 bit FAT (LBA)", 144 [0x0E] = "Primary 'big' DOS (>= 32MB, LBA)", 145 [0x0F] = "Extended DOS (LBA)", 146 [0x10] = "OPUS", 147 [0x11] = "OS/2 BM: hidden DOS with 12-bit FAT", 148 [0x12] = "Compaq diagnostics", 149 [0x14] = "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)", 150 [0x16] = "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)", 151 [0x17] = "OS/2 BM: hidden IFS (e.g. HPFS)", 152 [0x18] = "AST Windows swapfile", 153 [0x1b] = "ASUS Recovery partition (NTFS)", 154 [0x24] = "NEC DOS", 155 [0x3C] = "PartitionMagic recovery", 156 [0x39] = "plan9", 157 [0x40] = "VENIX 286", 158 [0x41] = "Linux/MINIX (sharing disk with DRDOS)", 159 [0x42] = "SFS or Linux swap (sharing disk with DRDOS)", 160 [0x43] = "Linux native (sharing disk with DRDOS)", 161 [0x4D] = "QNX 4.2 Primary", 162 [0x4E] = "QNX 4.2 Secondary", 163 [0x4F] = "QNX 4.2 Tertiary", 164 [0x50] = "DM (disk manager)", 165 [0x51] = "DM6 Aux1 (or Novell)", 166 [0x52] = "CP/M or Microport SysV/AT", 167 [0x53] = "DM6 Aux3", 168 [0x54] = "DM6", 169 [0x55] = "EZ-Drive (disk manager)", 170 [0x56] = "Golden Bow (disk manager)", 171 [0x5c] = "Priam Edisk (disk manager)", /* according to S. Widlake */ 172 [0x61] = "SpeedStor", 173 [0x63] = "System V/386 (such as ISC UNIX), GNU HURD or Mach", 174 [0x64] = "Novell Netware/286 2.xx", 175 [0x65] = "Novell Netware/386 3.xx", 176 [0x70] = "DiskSecure Multi-Boot", 177 [0x75] = "PCIX", 178 [0x77] = "QNX4.x", 179 [0x78] = "QNX4.x 2nd part", 180 [0x79] = "QNX4.x 3rd part", 181 [0x80] = "Minix until 1.4a", 182 [0x81] = "Minix since 1.4b, early Linux partition or Mitac disk manager", 183 [0x82] = "Linux swap or Solaris x86", 184 [0x83] = "Linux native", 185 [0x84] = "OS/2 hidden C: drive", 186 [0x85] = "Linux extended", 187 [0x86] = "NTFS volume set??", 188 [0x87] = "NTFS volume set??", 189 [0x93] = "Amoeba file system", 190 [0x94] = "Amoeba bad block table", 191 [0x9F] = "BSD/OS", 192 [0xA0] = "Suspend to Disk", 193 [0xA5] = "FreeBSD/NetBSD/386BSD", 194 [0xA6] = "OpenBSD", 195 [0xA7] = "NeXTSTEP", 196 [0xA9] = "NetBSD", 197 [0xAC] = "IBM JFS", 198 [0xAF] = "HFS+", 199 [0xB7] = "BSDI BSD/386 file system", 200 [0xB8] = "BSDI BSD/386 swap", 201 [0xBE] = "Solaris x86 boot", 202 [0xBF] = "Solaris x86 (new)", 203 [0xC1] = "DRDOS/sec with 12-bit FAT", 204 [0xC4] = "DRDOS/sec with 16-bit FAT (< 32MB)", 205 [0xC6] = "DRDOS/sec with 16-bit FAT (>= 32MB)", 206 [0xC7] = "Syrinx", 207 [0xDB] = "CP/M, Concurrent CP/M, Concurrent DOS or CTOS", 208 [0xDE] = "DELL Utilities - FAT filesystem", 209 [0xE1] = "DOS access or SpeedStor with 12-bit FAT extended partition", 210 [0xE3] = "DOS R/O or SpeedStor", 211 [0xE4] = "SpeedStor with 16-bit FAT extended partition < 1024 cyl.", 212 [0xEB] = "BeOS file system", 213 [0xEE] = "EFI GPT", 214 [0xEF] = "EFI System Partition", 215 [0xF1] = "SpeedStor", 216 [0xF2] = "DOS 3.3+ Secondary", 217 [0xF4] = "SpeedStor large partition", 218 [0xFE] = "SpeedStor >1024 cyl. or LANstep", 219 [0xFF] = "Xenix bad blocks table", 220 }; 221 222 static const char * 223 get_type(int t) 224 { 225 const char *ret; 226 227 ret = (t >= 0 && t <= 255) ? part_types[t] : NULL; 228 return ret ? ret : "unknown"; 229 } 230 231 232 static void print_s0(void); 233 static void print_part(const struct dos_partition *); 234 static void init_sector0(unsigned long start); 235 static void init_boot(void); 236 static void change_part(int i); 237 static void print_params(void); 238 static void change_active(int which); 239 static void change_code(void); 240 static void get_params_to_use(void); 241 static char *get_rootdisk(void); 242 static void dos(struct dos_partition *partp); 243 static int open_disk(int flag); 244 static ssize_t read_disk(off_t sector, void *buf); 245 static int write_disk(off_t sector, void *buf); 246 static int get_params(void); 247 static int read_s0(void); 248 static int write_s0(void); 249 static int ok(const char *str); 250 static int decimal(const char *str, int *num, int deflt); 251 static int read_config(char *config_file); 252 static void reset_boot(void); 253 static int sanitize_partition(struct dos_partition *); 254 static void usage(void); 255 256 int 257 main(int argc, char *argv[]) 258 { 259 int c, i; 260 int partition = -1; 261 struct dos_partition *partp; 262 263 while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1) 264 switch (c) { 265 case 'B': 266 B_flag = 1; 267 break; 268 case 'I': 269 I_flag = 1; 270 break; 271 case 'a': 272 a_flag = 1; 273 break; 274 case 'b': 275 b_flag = optarg; 276 break; 277 case 'f': 278 f_flag = optarg; 279 break; 280 case 'i': 281 i_flag = 1; 282 break; 283 case 'p': 284 print_config_flag = 1; 285 break; 286 case 'q': 287 q_flag = 1; 288 break; 289 case 's': 290 s_flag = 1; 291 break; 292 case 't': 293 t_flag = 1; 294 break; 295 case 'u': 296 u_flag = 1; 297 break; 298 case 'v': 299 v_flag = 1; 300 break; 301 case '1': 302 case '2': 303 case '3': 304 case '4': 305 partition = c - '0'; 306 break; 307 default: 308 usage(); 309 } 310 if (f_flag || i_flag) 311 u_flag = 1; 312 if (t_flag) 313 v_flag = 1; 314 argc -= optind; 315 argv += optind; 316 317 if (argc == 0) { 318 disk = get_rootdisk(); 319 } else { 320 disk = g_device_path(argv[0]); 321 if (disk == NULL) 322 err(1, "unable to get correct path for %s", argv[0]); 323 } 324 if (open_disk(u_flag) < 0) 325 err(1, "cannot open disk %s", disk); 326 327 /* (abu)use mboot.bootinst to probe for the sector size */ 328 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL) 329 err(1, "cannot allocate buffer to determine disk sector size"); 330 if (read_disk(0, mboot.bootinst) == -1) 331 errx(1, "could not detect sector size"); 332 free(mboot.bootinst); 333 mboot.bootinst = NULL; 334 335 if (print_config_flag) { 336 if (read_s0()) 337 err(1, "read_s0"); 338 339 printf("# %s\n", disk); 340 printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors); 341 342 for (i = 0; i < NDOSPART; i++) { 343 partp = &mboot.parts[i]; 344 345 if (partp->dp_start == 0 && partp->dp_size == 0) 346 continue; 347 348 printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ, 349 (u_long)partp->dp_start, (u_long)partp->dp_size); 350 351 /* Fill flags for the partition. */ 352 if (partp->dp_flag & 0x80) 353 printf("a %d\n", i + 1); 354 } 355 exit(0); 356 } 357 if (s_flag) { 358 if (read_s0()) 359 err(1, "read_s0"); 360 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads, 361 dos_sectors); 362 printf("Part %11s %11s Type Flags\n", "Start", "Size"); 363 for (i = 0; i < NDOSPART; i++) { 364 partp = &mboot.parts[i]; 365 if (partp->dp_start == 0 && partp->dp_size == 0) 366 continue; 367 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1, 368 (u_long) partp->dp_start, 369 (u_long) partp->dp_size, partp->dp_typ, 370 partp->dp_flag); 371 } 372 exit(0); 373 } 374 375 printf("******* Working on device %s *******\n",disk); 376 377 if (I_flag) { 378 read_s0(); 379 reset_boot(); 380 partp = &mboot.parts[0]; 381 partp->dp_typ = DOSPTYP_386BSD; 382 partp->dp_flag = ACTIVE; 383 partp->dp_start = dos_sectors; 384 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - 385 dos_sectors; 386 dos(partp); 387 if (v_flag) 388 print_s0(); 389 if (!t_flag) 390 write_s0(); 391 exit(0); 392 } 393 if (f_flag) { 394 if (read_s0() || i_flag) 395 reset_boot(); 396 if (!read_config(f_flag)) 397 exit(1); 398 if (v_flag) 399 print_s0(); 400 if (!t_flag) 401 write_s0(); 402 } else { 403 if(u_flag) 404 get_params_to_use(); 405 else 406 print_params(); 407 408 if (read_s0()) 409 init_sector0(dos_sectors); 410 411 printf("Media sector size is %d\n", secsize); 412 printf("Warning: BIOS sector numbering starts with sector 1\n"); 413 printf("Information from DOS bootblock is:\n"); 414 if (partition == -1) 415 for (i = 1; i <= NDOSPART; i++) 416 change_part(i); 417 else 418 change_part(partition); 419 420 if (u_flag || a_flag) 421 change_active(partition); 422 423 if (B_flag) 424 change_code(); 425 426 if (u_flag || a_flag || B_flag) { 427 if (!t_flag) { 428 printf("\nWe haven't changed the partition table yet. "); 429 printf("This is your last chance.\n"); 430 } 431 print_s0(); 432 if (!t_flag) { 433 if (ok("Should we write new partition table?")) 434 write_s0(); 435 } else { 436 printf("\n-t flag specified -- partition table not written.\n"); 437 } 438 } 439 } 440 441 exit(0); 442 } 443 444 static void 445 usage() 446 { 447 fprintf(stderr, "%s%s", 448 "usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n", 449 " fdisk -f configfile [-itv] [disk]\n"); 450 exit(1); 451 } 452 453 static void 454 print_s0(void) 455 { 456 int i; 457 458 print_params(); 459 printf("Information from DOS bootblock is:\n"); 460 for (i = 1; i <= NDOSPART; i++) { 461 printf("%d: ", i); 462 print_part(&mboot.parts[i - 1]); 463 } 464 } 465 466 static struct dos_partition mtpart; 467 468 static void 469 print_part(const struct dos_partition *partp) 470 { 471 u_int64_t part_mb; 472 473 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) { 474 printf("<UNUSED>\n"); 475 return; 476 } 477 /* 478 * Be careful not to overflow. 479 */ 480 part_mb = partp->dp_size; 481 part_mb *= secsize; 482 part_mb /= (1024 * 1024); 483 printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ, 484 get_type(partp->dp_typ)); 485 printf(" start %lu, size %lu (%ju Meg), flag %x%s\n", 486 (u_long)partp->dp_start, 487 (u_long)partp->dp_size, 488 (uintmax_t)part_mb, 489 partp->dp_flag, 490 partp->dp_flag == ACTIVE ? " (active)" : ""); 491 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n" 492 ,DPCYL(partp->dp_scyl, partp->dp_ssect) 493 ,partp->dp_shd 494 ,DPSECT(partp->dp_ssect) 495 ,DPCYL(partp->dp_ecyl, partp->dp_esect) 496 ,partp->dp_ehd 497 ,DPSECT(partp->dp_esect)); 498 } 499 500 501 static void 502 init_boot(void) 503 { 504 #ifndef __ia64__ 505 const char *fname; 506 int fdesc, n; 507 struct stat sb; 508 509 fname = b_flag ? b_flag : "/boot/mbr"; 510 if ((fdesc = open(fname, O_RDONLY)) == -1 || 511 fstat(fdesc, &sb) == -1) 512 err(1, "%s", fname); 513 if ((mboot.bootinst_size = sb.st_size) % secsize != 0) 514 errx(1, "%s: length must be a multiple of sector size", fname); 515 if (mboot.bootinst != NULL) 516 free(mboot.bootinst); 517 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL) 518 errx(1, "%s: unable to allocate read buffer", fname); 519 if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 || 520 close(fdesc)) 521 err(1, "%s", fname); 522 if (n != mboot.bootinst_size) 523 errx(1, "%s: short read", fname); 524 #else 525 if (mboot.bootinst != NULL) 526 free(mboot.bootinst); 527 mboot.bootinst_size = secsize; 528 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) 529 errx(1, "unable to allocate boot block buffer"); 530 memset(mboot.bootinst, 0, mboot.bootinst_size); 531 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC); 532 #endif 533 } 534 535 536 static void 537 init_sector0(unsigned long start) 538 { 539 struct dos_partition *partp = &mboot.parts[0]; 540 541 init_boot(); 542 543 partp->dp_typ = DOSPTYP_386BSD; 544 partp->dp_flag = ACTIVE; 545 start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors; 546 if(start == 0) 547 start = dos_sectors; 548 partp->dp_start = start; 549 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start; 550 551 dos(partp); 552 } 553 554 static void 555 change_part(int i) 556 { 557 struct dos_partition *partp = &mboot.parts[i - 1]; 558 559 printf("The data for partition %d is:\n", i); 560 print_part(partp); 561 562 if (u_flag && ok("Do you want to change it?")) { 563 int tmp; 564 565 if (i_flag) { 566 bzero(partp, sizeof (*partp)); 567 if (i == 1) { 568 init_sector0(1); 569 printf("\nThe static data for the slice 1 has been reinitialized to:\n"); 570 print_part(partp); 571 } 572 } 573 574 do { 575 Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp); 576 Decimal("start", partp->dp_start, tmp); 577 Decimal("size", partp->dp_size, tmp); 578 if (!sanitize_partition(partp)) { 579 warnx("ERROR: failed to adjust; setting sysid to 0"); 580 partp->dp_typ = 0; 581 } 582 583 if (ok("Explicitly specify beg/end address ?")) 584 { 585 int tsec,tcyl,thd; 586 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect); 587 thd = partp->dp_shd; 588 tsec = DPSECT(partp->dp_ssect); 589 Decimal("beginning cylinder", tcyl, tmp); 590 Decimal("beginning head", thd, tmp); 591 Decimal("beginning sector", tsec, tmp); 592 partp->dp_scyl = DOSCYL(tcyl); 593 partp->dp_ssect = DOSSECT(tsec,tcyl); 594 partp->dp_shd = thd; 595 596 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect); 597 thd = partp->dp_ehd; 598 tsec = DPSECT(partp->dp_esect); 599 Decimal("ending cylinder", tcyl, tmp); 600 Decimal("ending head", thd, tmp); 601 Decimal("ending sector", tsec, tmp); 602 partp->dp_ecyl = DOSCYL(tcyl); 603 partp->dp_esect = DOSSECT(tsec,tcyl); 604 partp->dp_ehd = thd; 605 } else 606 dos(partp); 607 608 print_part(partp); 609 } while (!ok("Are we happy with this entry?")); 610 } 611 } 612 613 static void 614 print_params() 615 { 616 printf("parameters extracted from in-core disklabel are:\n"); 617 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 618 ,cyls,heads,sectors,cylsecs); 619 if (dos_cyls > 1023 || dos_heads > 255 || dos_sectors > 63) 620 printf("Figures below won't work with BIOS for partitions not in cyl 1\n"); 621 printf("parameters to be used for BIOS calculations are:\n"); 622 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n" 623 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs); 624 } 625 626 static void 627 change_active(int which) 628 { 629 struct dos_partition *partp = &mboot.parts[0]; 630 int active, i, new, tmp; 631 632 active = -1; 633 for (i = 0; i < NDOSPART; i++) { 634 if ((partp[i].dp_flag & ACTIVE) == 0) 635 continue; 636 printf("Partition %d is marked active\n", i + 1); 637 if (active == -1) 638 active = i + 1; 639 } 640 if (a_flag && which != -1) 641 active = which; 642 else if (active == -1) 643 active = 1; 644 645 if (!ok("Do you want to change the active partition?")) 646 return; 647 setactive: 648 do { 649 new = active; 650 Decimal("active partition", new, tmp); 651 if (new < 1 || new > 4) { 652 printf("Active partition number must be in range 1-4." 653 " Try again.\n"); 654 goto setactive; 655 } 656 active = new; 657 } while (!ok("Are you happy with this choice")); 658 for (i = 0; i < NDOSPART; i++) 659 partp[i].dp_flag = 0; 660 if (active > 0 && active <= NDOSPART) 661 partp[active-1].dp_flag = ACTIVE; 662 } 663 664 static void 665 change_code() 666 { 667 if (ok("Do you want to change the boot code?")) 668 init_boot(); 669 } 670 671 void 672 get_params_to_use() 673 { 674 int tmp; 675 print_params(); 676 if (ok("Do you want to change our idea of what BIOS thinks ?")) 677 { 678 do 679 { 680 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp); 681 Decimal("BIOS's idea of #heads", dos_heads, tmp); 682 Decimal("BIOS's idea of #sectors", dos_sectors, tmp); 683 dos_cylsecs = dos_heads * dos_sectors; 684 print_params(); 685 } 686 while(!ok("Are you happy with this choice")); 687 } 688 } 689 690 691 /***********************************************\ 692 * Change real numbers into strange dos numbers * 693 \***********************************************/ 694 static void 695 dos(struct dos_partition *partp) 696 { 697 int cy, sec; 698 u_int32_t end; 699 700 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) { 701 memcpy(partp, &mtpart, sizeof(*partp)); 702 return; 703 } 704 705 /* Start c/h/s. */ 706 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors; 707 cy = partp->dp_start / dos_cylsecs; 708 sec = partp->dp_start % dos_sectors + 1; 709 partp->dp_scyl = DOSCYL(cy); 710 partp->dp_ssect = DOSSECT(sec, cy); 711 712 /* End c/h/s. */ 713 end = partp->dp_start + partp->dp_size - 1; 714 partp->dp_ehd = end % dos_cylsecs / dos_sectors; 715 cy = end / dos_cylsecs; 716 sec = end % dos_sectors + 1; 717 partp->dp_ecyl = DOSCYL(cy); 718 partp->dp_esect = DOSSECT(sec, cy); 719 } 720 721 static int 722 open_disk(int flag) 723 { 724 int rwmode; 725 726 /* Write mode if one of these flags are set. */ 727 rwmode = (a_flag || I_flag || B_flag || flag); 728 fd = g_open(disk, rwmode); 729 /* If the mode fails, try read-only if we didn't. */ 730 if (fd == -1 && errno == EPERM && rwmode) 731 fd = g_open(disk, 0); 732 if (fd == -1 && errno == ENXIO) 733 return -2; 734 if (fd == -1) { 735 warnx("can't open device %s", disk); 736 return -1; 737 } 738 if (get_params() == -1) { 739 warnx("can't get disk parameters on %s", disk); 740 return -1; 741 } 742 return fd; 743 } 744 745 static ssize_t 746 read_disk(off_t sector, void *buf) 747 { 748 749 lseek(fd, (sector * 512), 0); 750 if (secsize == 0) 751 for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE; 752 secsize *= 2) { 753 /* try the read */ 754 int size = read(fd, buf, secsize); 755 if (size == secsize) 756 /* it worked so return */ 757 return secsize; 758 } 759 else 760 return read(fd, buf, secsize); 761 762 /* we failed to read at any of the sizes */ 763 return -1; 764 } 765 766 static int 767 write_disk(off_t sector, void *buf) 768 { 769 int error; 770 struct gctl_req *grq; 771 const char *errmsg; 772 char fbuf[BUFSIZ], *pname; 773 int i, fdw; 774 775 grq = gctl_get_handle(); 776 gctl_ro_param(grq, "verb", -1, "write MBR"); 777 gctl_ro_param(grq, "class", -1, "MBR"); 778 pname = g_providername(fd); 779 if (pname == NULL) { 780 warn("Error getting providername for %s", disk); 781 return (-1); 782 } 783 gctl_ro_param(grq, "geom", -1, pname); 784 gctl_ro_param(grq, "data", secsize, buf); 785 errmsg = gctl_issue(grq); 786 free(pname); 787 if (errmsg == NULL) { 788 gctl_free(grq); 789 return(0); 790 } 791 if (!q_flag) /* GEOM errors are benign, not all devices supported */ 792 warnx("%s", errmsg); 793 gctl_free(grq); 794 795 error = pwrite(fd, buf, secsize, (sector * 512)); 796 if (error == secsize) 797 return (0); 798 799 for (i = 1; i < 5; i++) { 800 sprintf(fbuf, "%ss%d", disk, i); 801 fdw = open(fbuf, O_RDWR, 0); 802 if (fdw < 0) 803 continue; 804 error = ioctl(fdw, DIOCSMBR, buf); 805 close(fdw); 806 if (error == 0) 807 return (0); 808 } 809 warnx("Failed to write sector zero"); 810 return(EINVAL); 811 } 812 813 static int 814 get_params() 815 { 816 int error; 817 u_int u; 818 off_t o; 819 820 error = ioctl(fd, DIOCGFWSECTORS, &u); 821 if (error == 0) 822 sectors = dos_sectors = u; 823 else 824 sectors = dos_sectors = 63; 825 826 error = ioctl(fd, DIOCGFWHEADS, &u); 827 if (error == 0) 828 heads = dos_heads = u; 829 else 830 heads = dos_heads = 255; 831 832 dos_cylsecs = cylsecs = heads * sectors; 833 disksecs = cyls * heads * sectors; 834 835 u = g_sectorsize(fd); 836 if (u <= 0) 837 return (-1); 838 839 o = g_mediasize(fd); 840 if (o < 0) 841 return (-1); 842 disksecs = o / u; 843 cyls = dos_cyls = o / (u * dos_heads * dos_sectors); 844 845 return (disksecs); 846 } 847 848 static int 849 read_s0() 850 { 851 int i; 852 853 mboot.bootinst_size = secsize; 854 if (mboot.bootinst != NULL) 855 free(mboot.bootinst); 856 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) { 857 warnx("unable to allocate buffer to read fdisk " 858 "partition table"); 859 return -1; 860 } 861 if (read_disk(0, mboot.bootinst) == -1) { 862 warnx("can't read fdisk partition table"); 863 return -1; 864 } 865 if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) { 866 warnx("invalid fdisk partition table found"); 867 /* So should we initialize things */ 868 return -1; 869 } 870 for (i = 0; i < NDOSPART; i++) 871 dos_partition_dec( 872 &mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE], 873 &mboot.parts[i]); 874 return 0; 875 } 876 877 static int 878 write_s0() 879 { 880 int sector, i; 881 882 if (iotest) { 883 print_s0(); 884 return 0; 885 } 886 for(i = 0; i < NDOSPART; i++) 887 dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE], 888 &mboot.parts[i]); 889 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC); 890 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++) 891 if (write_disk(sector, 892 &mboot.bootinst[sector * secsize]) == -1) { 893 warn("can't write fdisk partition table"); 894 return -1; 895 } 896 return(0); 897 } 898 899 900 static int 901 ok(const char *str) 902 { 903 printf("%s [n] ", str); 904 fflush(stdout); 905 if (fgets(lbuf, LBUF, stdin) == NULL) 906 exit(1); 907 lbuf[strlen(lbuf)-1] = 0; 908 909 if (*lbuf && 910 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") || 911 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y"))) 912 return 1; 913 else 914 return 0; 915 } 916 917 static int 918 decimal(const char *str, int *num, int deflt) 919 { 920 int acc = 0, c; 921 char *cp; 922 923 while (1) { 924 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt); 925 fflush(stdout); 926 if (fgets(lbuf, LBUF, stdin) == NULL) 927 exit(1); 928 lbuf[strlen(lbuf)-1] = 0; 929 930 if (!*lbuf) 931 return 0; 932 933 cp = lbuf; 934 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 935 if (!c) 936 return 0; 937 while ((c = *cp++)) { 938 if (c <= '9' && c >= '0') 939 acc = acc * 10 + c - '0'; 940 else 941 break; 942 } 943 if (c == ' ' || c == '\t') 944 while ((c = *cp) && (c == ' ' || c == '\t')) cp++; 945 if (!c) { 946 *num = acc; 947 return 1; 948 } else 949 printf("%s is an invalid decimal number. Try again.\n", 950 lbuf); 951 } 952 953 } 954 955 956 static void 957 parse_config_line(char *line, CMD *command) 958 { 959 char *cp, *end; 960 961 cp = line; 962 while (1) { 963 memset(command, 0, sizeof(*command)); 964 965 while (isspace(*cp)) ++cp; 966 if (*cp == '\0' || *cp == '#') 967 break; 968 command->cmd = *cp++; 969 970 /* 971 * Parse args 972 */ 973 while (1) { 974 while (isspace(*cp)) ++cp; 975 if (*cp == '\0') 976 break; /* eol */ 977 if (*cp == '#') 978 break; /* found comment */ 979 if (isalpha(*cp)) 980 command->args[command->n_args].argtype = *cp++; 981 end = NULL; 982 command->args[command->n_args].arg_val = strtol(cp, &end, 0); 983 if (cp == end || (!isspace(*end) && *end != '\0')) { 984 char ch; 985 end = cp; 986 while (!isspace(*end) && *end != '\0') ++end; 987 ch = *end; *end = '\0'; 988 command->args[command->n_args].arg_str = strdup(cp); 989 *end = ch; 990 } else 991 command->args[command->n_args].arg_str = NULL; 992 cp = end; 993 command->n_args++; 994 } 995 break; 996 } 997 } 998 999 1000 static int 1001 process_geometry(CMD *command) 1002 { 1003 int status = 1, i; 1004 1005 while (1) { 1006 geom_processed = 1; 1007 if (part_processed) { 1008 warnx( 1009 "ERROR line %d: the geometry specification line must occur before\n\ 1010 all partition specifications", 1011 current_line_number); 1012 status = 0; 1013 break; 1014 } 1015 if (command->n_args != 3) { 1016 warnx("ERROR line %d: incorrect number of geometry args", 1017 current_line_number); 1018 status = 0; 1019 break; 1020 } 1021 dos_cyls = 0; 1022 dos_heads = 0; 1023 dos_sectors = 0; 1024 for (i = 0; i < 3; ++i) { 1025 switch (command->args[i].argtype) { 1026 case 'c': 1027 dos_cyls = command->args[i].arg_val; 1028 break; 1029 case 'h': 1030 dos_heads = command->args[i].arg_val; 1031 break; 1032 case 's': 1033 dos_sectors = command->args[i].arg_val; 1034 break; 1035 default: 1036 warnx( 1037 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)", 1038 current_line_number, command->args[i].argtype, 1039 command->args[i].argtype); 1040 status = 0; 1041 break; 1042 } 1043 } 1044 if (status == 0) 1045 break; 1046 1047 dos_cylsecs = dos_heads * dos_sectors; 1048 1049 /* 1050 * Do sanity checks on parameter values 1051 */ 1052 if (dos_cyls == 0) { 1053 warnx("ERROR line %d: number of cylinders not specified", 1054 current_line_number); 1055 status = 0; 1056 } 1057 if (dos_cyls > 1024) { 1058 warnx( 1059 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\ 1060 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\ 1061 is dedicated to FreeBSD)", 1062 current_line_number, dos_cyls); 1063 } 1064 1065 if (dos_heads == 0) { 1066 warnx("ERROR line %d: number of heads not specified", 1067 current_line_number); 1068 status = 0; 1069 } else if (dos_heads > 256) { 1070 warnx("ERROR line %d: number of heads must be within (1-256)", 1071 current_line_number); 1072 status = 0; 1073 } 1074 1075 if (dos_sectors == 0) { 1076 warnx("ERROR line %d: number of sectors not specified", 1077 current_line_number); 1078 status = 0; 1079 } else if (dos_sectors > 63) { 1080 warnx("ERROR line %d: number of sectors must be within (1-63)", 1081 current_line_number); 1082 status = 0; 1083 } 1084 1085 break; 1086 } 1087 return (status); 1088 } 1089 1090 static u_int32_t 1091 str2sectors(const char *str) 1092 { 1093 char *end; 1094 unsigned long val; 1095 1096 val = strtoul(str, &end, 0); 1097 if (str == end || *end == '\0') { 1098 warnx("ERROR line %d: unexpected size: \'%s\'", 1099 current_line_number, str); 1100 return NOSECTORS; 1101 } 1102 1103 if (*end == 'K') 1104 val *= 1024UL / secsize; 1105 else if (*end == 'M') 1106 val *= 1024UL * 1024UL / secsize; 1107 else if (*end == 'G') 1108 val *= 1024UL * 1024UL * 1024UL / secsize; 1109 else { 1110 warnx("ERROR line %d: unexpected modifier: %c " 1111 "(not K/M/G)", current_line_number, *end); 1112 return NOSECTORS; 1113 } 1114 1115 return val; 1116 } 1117 1118 static int 1119 process_partition(CMD *command) 1120 { 1121 int status = 0, partition; 1122 u_int32_t prev_head_boundary, prev_cyl_boundary; 1123 u_int32_t adj_size, max_end; 1124 struct dos_partition *partp; 1125 1126 while (1) { 1127 part_processed = 1; 1128 if (command->n_args != 4) { 1129 warnx("ERROR line %d: incorrect number of partition args", 1130 current_line_number); 1131 break; 1132 } 1133 partition = command->args[0].arg_val; 1134 if (partition < 1 || partition > 4) { 1135 warnx("ERROR line %d: invalid partition number %d", 1136 current_line_number, partition); 1137 break; 1138 } 1139 partp = &mboot.parts[partition - 1]; 1140 bzero(partp, sizeof (*partp)); 1141 partp->dp_typ = command->args[1].arg_val; 1142 if (command->args[2].arg_str != NULL) { 1143 if (strcmp(command->args[2].arg_str, "*") == 0) { 1144 int i; 1145 partp->dp_start = dos_sectors; 1146 for (i = 1; i < partition; i++) { 1147 struct dos_partition *prev_partp; 1148 prev_partp = ((struct dos_partition *) 1149 &mboot.parts) + i - 1; 1150 if (prev_partp->dp_typ != 0) 1151 partp->dp_start = prev_partp->dp_start + 1152 prev_partp->dp_size; 1153 } 1154 if (partp->dp_start % dos_sectors != 0) { 1155 prev_head_boundary = partp->dp_start / 1156 dos_sectors * dos_sectors; 1157 partp->dp_start = prev_head_boundary + 1158 dos_sectors; 1159 } 1160 } else { 1161 partp->dp_start = str2sectors(command->args[2].arg_str); 1162 if (partp->dp_start == NOSECTORS) 1163 break; 1164 } 1165 } else 1166 partp->dp_start = command->args[2].arg_val; 1167 1168 if (command->args[3].arg_str != NULL) { 1169 if (strcmp(command->args[3].arg_str, "*") == 0) 1170 partp->dp_size = ((disksecs / dos_cylsecs) * 1171 dos_cylsecs) - partp->dp_start; 1172 else { 1173 partp->dp_size = str2sectors(command->args[3].arg_str); 1174 if (partp->dp_size == NOSECTORS) 1175 break; 1176 } 1177 prev_cyl_boundary = ((partp->dp_start + partp->dp_size) / 1178 dos_cylsecs) * dos_cylsecs; 1179 if (prev_cyl_boundary > partp->dp_start) 1180 partp->dp_size = prev_cyl_boundary - partp->dp_start; 1181 } else 1182 partp->dp_size = command->args[3].arg_val; 1183 1184 max_end = partp->dp_start + partp->dp_size; 1185 1186 if (partp->dp_typ == 0) { 1187 /* 1188 * Get out, the partition is marked as unused. 1189 */ 1190 /* 1191 * Insure that it's unused. 1192 */ 1193 bzero(partp, sizeof(*partp)); 1194 status = 1; 1195 break; 1196 } 1197 1198 /* 1199 * Adjust start upwards, if necessary, to fall on a head boundary. 1200 */ 1201 if (partp->dp_start % dos_sectors != 0) { 1202 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors; 1203 if (max_end < dos_sectors || 1204 prev_head_boundary > max_end - dos_sectors) { 1205 /* 1206 * Can't go past end of partition 1207 */ 1208 warnx( 1209 "ERROR line %d: unable to adjust start of partition %d to fall on\n\ 1210 a head boundary", 1211 current_line_number, partition); 1212 break; 1213 } 1214 warnx( 1215 "WARNING: adjusting start offset of partition %d\n\ 1216 from %u to %u, to fall on a head boundary", 1217 partition, (u_int)partp->dp_start, 1218 (u_int)(prev_head_boundary + dos_sectors)); 1219 partp->dp_start = prev_head_boundary + dos_sectors; 1220 } 1221 1222 /* 1223 * Adjust size downwards, if necessary, to fall on a cylinder 1224 * boundary. 1225 */ 1226 prev_cyl_boundary = 1227 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs; 1228 if (prev_cyl_boundary > partp->dp_start) 1229 adj_size = prev_cyl_boundary - partp->dp_start; 1230 else { 1231 warnx( 1232 "ERROR: could not adjust partition to start on a head boundary\n\ 1233 and end on a cylinder boundary."); 1234 return (0); 1235 } 1236 if (adj_size != partp->dp_size) { 1237 warnx( 1238 "WARNING: adjusting size of partition %d from %u to %u\n\ 1239 to end on a cylinder boundary", 1240 partition, (u_int)partp->dp_size, (u_int)adj_size); 1241 partp->dp_size = adj_size; 1242 } 1243 if (partp->dp_size == 0) { 1244 warnx("ERROR line %d: size of partition %d is zero", 1245 current_line_number, partition); 1246 break; 1247 } 1248 1249 dos(partp); 1250 status = 1; 1251 break; 1252 } 1253 return (status); 1254 } 1255 1256 1257 static int 1258 process_active(CMD *command) 1259 { 1260 int status = 0, partition, i; 1261 struct dos_partition *partp; 1262 1263 while (1) { 1264 active_processed = 1; 1265 if (command->n_args != 1) { 1266 warnx("ERROR line %d: incorrect number of active args", 1267 current_line_number); 1268 status = 0; 1269 break; 1270 } 1271 partition = command->args[0].arg_val; 1272 if (partition < 1 || partition > 4) { 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 = 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 1292 static int 1293 process_line(char *line) 1294 { 1295 CMD command; 1296 int status = 1; 1297 1298 while (1) { 1299 parse_config_line(line, &command); 1300 switch (command.cmd) { 1301 case 0: 1302 /* 1303 * Comment or blank line 1304 */ 1305 break; 1306 case 'g': 1307 /* 1308 * Set geometry 1309 */ 1310 status = process_geometry(&command); 1311 break; 1312 case 'p': 1313 status = process_partition(&command); 1314 break; 1315 case 'a': 1316 status = process_active(&command); 1317 break; 1318 default: 1319 status = 0; 1320 break; 1321 } 1322 break; 1323 } 1324 return (status); 1325 } 1326 1327 1328 static int 1329 read_config(char *config_file) 1330 { 1331 FILE *fp = NULL; 1332 int status = 1; 1333 char buf[1010]; 1334 1335 while (1) { 1336 if (strcmp(config_file, "-") != 0) { 1337 /* 1338 * We're not reading from stdin 1339 */ 1340 if ((fp = fopen(config_file, "r")) == NULL) { 1341 status = 0; 1342 break; 1343 } 1344 } else { 1345 fp = stdin; 1346 } 1347 current_line_number = 0; 1348 while (!feof(fp)) { 1349 if (fgets(buf, sizeof(buf), fp) == NULL) 1350 break; 1351 ++current_line_number; 1352 status = process_line(buf); 1353 if (status == 0) 1354 break; 1355 } 1356 break; 1357 } 1358 if (fp) { 1359 /* 1360 * It doesn't matter if we're reading from stdin, as we've reached EOF 1361 */ 1362 fclose(fp); 1363 } 1364 return (status); 1365 } 1366 1367 1368 static void 1369 reset_boot(void) 1370 { 1371 int i; 1372 struct dos_partition *partp; 1373 1374 init_boot(); 1375 for (i = 0; i < 4; ++i) { 1376 partp = &mboot.parts[i]; 1377 bzero(partp, sizeof(*partp)); 1378 } 1379 } 1380 1381 static int 1382 sanitize_partition(struct dos_partition *partp) 1383 { 1384 u_int32_t prev_head_boundary, prev_cyl_boundary; 1385 u_int32_t max_end, size, start; 1386 1387 start = partp->dp_start; 1388 size = partp->dp_size; 1389 max_end = start + size; 1390 /* Only allow a zero size if the partition is being marked unused. */ 1391 if (size == 0) { 1392 if (start == 0 && partp->dp_typ == 0) 1393 return (1); 1394 warnx("ERROR: size of partition is zero"); 1395 return (0); 1396 } 1397 /* Return if no adjustment is necessary. */ 1398 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0) 1399 return (1); 1400 1401 if (start == 0) { 1402 warnx("WARNING: partition overlaps with partition table"); 1403 if (ok("Correct this automatically?")) 1404 start = dos_sectors; 1405 } 1406 if (start % dos_sectors != 0) 1407 warnx("WARNING: partition does not start on a head boundary"); 1408 if ((start +size) % dos_sectors != 0) 1409 warnx("WARNING: partition does not end on a cylinder boundary"); 1410 warnx("WARNING: this may confuse the BIOS or some operating systems"); 1411 if (!ok("Correct this automatically?")) 1412 return (1); 1413 1414 /* 1415 * Adjust start upwards, if necessary, to fall on a head boundary. 1416 */ 1417 if (start % dos_sectors != 0) { 1418 prev_head_boundary = start / dos_sectors * dos_sectors; 1419 if (max_end < dos_sectors || 1420 prev_head_boundary >= max_end - dos_sectors) { 1421 /* 1422 * Can't go past end of partition 1423 */ 1424 warnx( 1425 "ERROR: unable to adjust start of partition to fall on a head boundary"); 1426 return (0); 1427 } 1428 start = prev_head_boundary + dos_sectors; 1429 } 1430 1431 /* 1432 * Adjust size downwards, if necessary, to fall on a cylinder 1433 * boundary. 1434 */ 1435 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs; 1436 if (prev_cyl_boundary > start) 1437 size = prev_cyl_boundary - start; 1438 else { 1439 warnx("ERROR: could not adjust partition to start on a head boundary\n\ 1440 and end on a cylinder boundary."); 1441 return (0); 1442 } 1443 1444 /* Finally, commit any changes to partp and return. */ 1445 if (start != partp->dp_start) { 1446 warnx("WARNING: adjusting start offset of partition to %u", 1447 (u_int)start); 1448 partp->dp_start = start; 1449 } 1450 if (size != partp->dp_size) { 1451 warnx("WARNING: adjusting size of partition to %u", (u_int)size); 1452 partp->dp_size = size; 1453 } 1454 1455 return (1); 1456 } 1457 1458 /* 1459 * Try figuring out the root device's canonical disk name. 1460 * The following choices are considered: 1461 * /dev/ad0s1a => /dev/ad0 1462 * /dev/da0a => /dev/da0 1463 * /dev/vinum/root => /dev/vinum/root 1464 */ 1465 static char * 1466 get_rootdisk(void) 1467 { 1468 struct statfs rootfs; 1469 regex_t re; 1470 #define NMATCHES 2 1471 regmatch_t rm[NMATCHES]; 1472 char *s; 1473 int rv; 1474 1475 if (statfs("/", &rootfs) == -1) 1476 err(1, "statfs(\"/\")"); 1477 1478 if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]+)([sp][0-9]+)?[a-h]?$", 1479 REG_EXTENDED)) != 0) 1480 errx(1, "regcomp() failed (%d)", rv); 1481 if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0) 1482 errx(1, 1483 "mounted root fs resource doesn't match expectations (regexec returned %d)", 1484 rv); 1485 if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL) 1486 errx(1, "out of memory"); 1487 memcpy(s, rootfs.f_mntfromname + rm[1].rm_so, 1488 rm[1].rm_eo - rm[1].rm_so); 1489 s[rm[1].rm_eo - rm[1].rm_so] = 0; 1490 1491 return s; 1492 } 1493