1 /* 2 * Copyright (c) 1994, 1995 Gordon W. Ross 3 * Copyright (c) 1994 Theo de Raadt 4 * All rights reserved. 5 * Copyright (c) 1987, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Symmetric Computer Systems. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * This product includes software developed by Theo de Raadt. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $ 41 */ 42 43 #if 0 44 #ifndef lint 45 static const char copyright[] = 46 "@(#) Copyright (c) 1987, 1993\n\ 47 The Regents of the University of California. All rights reserved.\n"; 48 #endif /* not lint */ 49 50 #ifndef lint 51 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94"; 52 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ 53 #endif /* not lint */ 54 #endif 55 #include <sys/cdefs.h> 56 __FBSDID("$FreeBSD$"); 57 58 #include <sys/param.h> 59 #include <stdint.h> 60 #include <sys/file.h> 61 #include <sys/stat.h> 62 #include <sys/wait.h> 63 #include <sys/disk.h> 64 #define DKTYPENAMES 65 #define FSTYPENAMES 66 #define MAXPARTITIONS 26 67 #include <sys/disklabel.h> 68 69 #include <unistd.h> 70 #include <string.h> 71 #include <stdio.h> 72 #include <libgeom.h> 73 #include <stdlib.h> 74 #include <signal.h> 75 #include <stdarg.h> 76 #include <ctype.h> 77 #include <err.h> 78 #include <errno.h> 79 80 #include "pathnames.h" 81 82 static void makelabel(const char *, struct disklabel *); 83 static int writelabel(void); 84 static int readlabel(int flag); 85 static void display(FILE *, const struct disklabel *); 86 static int edit(void); 87 static int editit(void); 88 static void fixlabel(struct disklabel *); 89 static char *skip(char *); 90 static char *word(char *); 91 static int getasciilabel(FILE *, struct disklabel *); 92 static int getasciipartspec(char *, struct disklabel *, int, int); 93 static int checklabel(struct disklabel *); 94 static void usage(void); 95 static struct disklabel *getvirginlabel(void); 96 97 #define DEFEDITOR _PATH_VI 98 #define DEFPARTITIONS 8 99 100 static char *specname; 101 static char *pname; 102 static char tmpfil[] = PATH_TMPFILE; 103 104 static struct disklabel lab; 105 static u_char bootarea[BBSIZE]; 106 static off_t mediasize; 107 static u_int secsize; 108 static char blank[] = ""; 109 static char unknown[] = "unknown"; 110 111 #define MAX_PART ('z') 112 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 113 static char part_size_type[MAX_NUM_PARTS]; 114 static char part_offset_type[MAX_NUM_PARTS]; 115 static int part_set[MAX_NUM_PARTS]; 116 117 static int installboot; /* non-zero if we should install a boot program */ 118 static int allfields; /* present all fields in edit */ 119 static char const *xxboot; /* primary boot */ 120 121 static uint32_t lba_offset; 122 #ifndef LABELSECTOR 123 #define LABELSECTOR -1 124 #endif 125 #ifndef LABELOFFSET 126 #define LABELOFFSET -1 127 #endif 128 static int labelsoffset = LABELSECTOR; 129 static int labeloffset = LABELOFFSET; 130 static int bbsize = BBSIZE; 131 static int alphacksum = 132 #if defined(__alpha__) 133 1; 134 #else 135 0; 136 #endif 137 138 enum { 139 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 140 } op = UNSPEC; 141 142 143 static int disable_write; /* set to disable writing to disk label */ 144 static int is_file; /* work on a file (abs. pathname), "-f" opt. */ 145 146 int 147 main(int argc, char *argv[]) 148 { 149 FILE *t; 150 int ch, error, fd; 151 const char *name; 152 153 error = 0; 154 name = NULL; 155 156 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1) 157 switch (ch) { 158 case 'A': 159 allfields = 1; 160 break; 161 case 'B': 162 ++installboot; 163 break; 164 case 'b': 165 xxboot = optarg; 166 break; 167 case 'f': 168 is_file=1; 169 break; 170 case 'm': 171 if (!strcmp(optarg, "i386") || 172 !strcmp(optarg, "amd64") || 173 !strcmp(optarg, "ia64") || 174 !strcmp(optarg, "pc98")) { 175 labelsoffset = 1; 176 labeloffset = 0; 177 bbsize = 8192; 178 alphacksum = 0; 179 } else if (!strcmp(optarg, "alpha")) { 180 labelsoffset = 0; 181 labeloffset = 64; 182 bbsize = 8192; 183 alphacksum = 1; 184 } else { 185 errx(1, "Unsupported architecture"); 186 } 187 break; 188 case 'n': 189 disable_write = 1; 190 break; 191 case 'R': 192 if (op != UNSPEC) 193 usage(); 194 op = RESTORE; 195 break; 196 case 'e': 197 if (op != UNSPEC) 198 usage(); 199 op = EDIT; 200 break; 201 case 'r': 202 /* 203 * We accept and ignode -r for compatibility with 204 * historically disklabel usage. 205 */ 206 break; 207 case 'w': 208 if (op != UNSPEC) 209 usage(); 210 op = WRITE; 211 break; 212 case '?': 213 default: 214 usage(); 215 } 216 argc -= optind; 217 argv += optind; 218 219 if (argc < 1) 220 usage(); 221 if (labelsoffset < 0 || labeloffset < 0) 222 errx(1, "a -m <architecture> option must be specified"); 223 224 /* Figure out the names of the thing we're working on */ 225 if (is_file) { 226 specname = argv[0]; 227 } else { 228 specname = g_device_path(argv[0]); 229 if (specname == NULL) { 230 warn("unable to get correct path for %s", argv[0]); 231 return(1); 232 } 233 fd = open(specname, O_RDONLY); 234 if (fd < 0) { 235 warn("error opening %s", specname); 236 return(1); 237 } 238 pname = g_providername(fd); 239 if (pname == NULL) { 240 warn("error getting providername for %s", specname); 241 close(fd); 242 return(1); 243 } 244 close(fd); 245 } 246 247 if (installboot && op == UNSPEC) 248 op = WRITEBOOT; 249 else if (op == UNSPEC) 250 op = READ; 251 252 switch(op) { 253 254 case UNSPEC: 255 break; 256 257 case EDIT: 258 if (argc != 1) 259 usage(); 260 readlabel(1); 261 fixlabel(&lab); 262 error = edit(); 263 break; 264 265 case READ: 266 if (argc != 1) 267 usage(); 268 readlabel(1); 269 display(stdout, NULL); 270 error = checklabel(NULL); 271 break; 272 273 case RESTORE: 274 if (argc != 2) 275 usage(); 276 if (!(t = fopen(argv[1], "r"))) 277 err(4, "fopen %s", argv[1]); 278 readlabel(0); 279 if (!getasciilabel(t, &lab)) 280 exit(1); 281 error = writelabel(); 282 break; 283 284 case WRITE: 285 if (argc == 2) 286 name = argv[1]; 287 else if (argc == 1) 288 name = "auto"; 289 else 290 usage(); 291 readlabel(0); 292 makelabel(name, &lab); 293 fixlabel(&lab); 294 if (checklabel(NULL) == 0) 295 error = writelabel(); 296 break; 297 298 case WRITEBOOT: 299 300 readlabel(1); 301 fixlabel(&lab); 302 if (argc == 2) 303 makelabel(argv[1], &lab); 304 if (checklabel(NULL) == 0) 305 error = writelabel(); 306 break; 307 } 308 exit(error); 309 } 310 311 static void 312 fixlabel(struct disklabel *lp) 313 { 314 struct partition *dp; 315 int i; 316 317 for (i = 0; i < lp->d_npartitions; i++) { 318 if (i == RAW_PART) 319 continue; 320 if (lp->d_partitions[i].p_size) 321 return; 322 } 323 324 dp = &lp->d_partitions[0]; 325 dp->p_offset = BBSIZE / secsize; 326 dp->p_size = lp->d_secperunit - dp->p_offset; 327 } 328 329 /* 330 * Construct a prototype disklabel from /etc/disktab. 331 */ 332 static void 333 makelabel(const char *type, struct disklabel *lp) 334 { 335 struct disklabel *dp; 336 337 if (strcmp(type, "auto") == 0) 338 dp = getvirginlabel(); 339 else 340 dp = getdiskbyname(type); 341 if (dp == NULL) 342 errx(1, "%s: unknown disk type", type); 343 *lp = *dp; 344 bzero(lp->d_packname, sizeof(lp->d_packname)); 345 } 346 347 static void 348 readboot(void) 349 { 350 int fd, i; 351 struct stat st; 352 uint64_t *p; 353 354 if (xxboot == NULL) 355 xxboot = "/boot/boot"; 356 fd = open(xxboot, O_RDONLY); 357 if (fd < 0) 358 err(1, "cannot open %s", xxboot); 359 fstat(fd, &st); 360 if (alphacksum && st.st_size <= BBSIZE - 512) { 361 i = read(fd, bootarea + 512, st.st_size); 362 if (i != st.st_size) 363 err(1, "read error %s", xxboot); 364 365 /* 366 * Set the location and length so SRM can find the 367 * boot blocks. 368 */ 369 p = (uint64_t *)bootarea; 370 p[60] = (st.st_size + secsize - 1) / secsize; 371 p[61] = 1; 372 p[62] = 0; 373 return; 374 } else if ((!alphacksum) && st.st_size <= BBSIZE) { 375 i = read(fd, bootarea, st.st_size); 376 if (i != st.st_size) 377 err(1, "read error %s", xxboot); 378 return; 379 } 380 errx(1, "boot code %s is wrong size", xxboot); 381 } 382 383 static int 384 writelabel(void) 385 { 386 uint64_t *p, sum; 387 int i, fd; 388 struct gctl_req *grq; 389 char const *errstr; 390 struct disklabel *lp = &lab; 391 392 if (disable_write) { 393 warnx("write to disk label supressed - label was as follows:"); 394 display(stdout, NULL); 395 return (0); 396 } 397 398 lp->d_magic = DISKMAGIC; 399 lp->d_magic2 = DISKMAGIC; 400 lp->d_checksum = 0; 401 lp->d_checksum = dkcksum(lp); 402 if (installboot) 403 readboot(); 404 for (i = 0; i < lab.d_npartitions; i++) 405 if (lab.d_partitions[i].p_size) 406 lab.d_partitions[i].p_offset += lba_offset; 407 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 408 lp); 409 if (alphacksum) { 410 /* Generate the bootblock checksum for the SRM console. */ 411 for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++) 412 sum += p[i]; 413 p[63] = sum; 414 } 415 416 fd = open(specname, O_RDWR); 417 if (fd < 0) { 418 if (is_file) { 419 warn("cannot open file %s for writing label", specname); 420 return(1); 421 } 422 423 grq = gctl_get_handle(); 424 gctl_ro_param(grq, "verb", -1, "write label"); 425 gctl_ro_param(grq, "class", -1, "BSD"); 426 gctl_ro_param(grq, "geom", -1, pname); 427 gctl_ro_param(grq, "label", 148+16*8, 428 bootarea + labeloffset + labelsoffset * secsize); 429 errstr = gctl_issue(grq); 430 if (errstr != NULL) { 431 warnx("%s", errstr); 432 gctl_free(grq); 433 return(1); 434 } 435 gctl_free(grq); 436 if (installboot) { 437 grq = gctl_get_handle(); 438 gctl_ro_param(grq, "verb", -1, "write bootcode"); 439 gctl_ro_param(grq, "class", -1, "BSD"); 440 gctl_ro_param(grq, "geom", -1, pname); 441 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 442 errstr = gctl_issue(grq); 443 if (errstr != NULL) { 444 warnx("%s", errstr); 445 gctl_free(grq); 446 return (1); 447 } 448 gctl_free(grq); 449 } 450 } else { 451 if (write(fd, bootarea, bbsize) != bbsize) { 452 warn("write %s", specname); 453 close (fd); 454 return (1); 455 } 456 close (fd); 457 } 458 return (0); 459 } 460 461 static void 462 get_file_parms(int f) 463 { 464 int i; 465 struct stat sb; 466 467 if (fstat(f, &sb) != 0) 468 err(4, "fstat failed"); 469 i = sb.st_mode & S_IFMT; 470 if (i != S_IFREG && i != S_IFLNK) 471 errx(4, "%s is not a valid file or link", specname); 472 secsize = DEV_BSIZE; 473 mediasize = sb.st_size; 474 } 475 476 /* 477 * Fetch disklabel for disk. 478 */ 479 static int 480 readlabel(int flag) 481 { 482 uint32_t lba; 483 int f, i; 484 int error; 485 486 f = open(specname, O_RDONLY); 487 if (f < 0) 488 err(1, specname); 489 if (is_file) 490 get_file_parms(f); 491 else { 492 mediasize = g_mediasize(f); 493 secsize = g_sectorsize(f); 494 if (secsize < 0 || mediasize < 0) 495 err(4, "cannot get disk geometry"); 496 } 497 if (mediasize > (off_t)0xffffffff * secsize) 498 errx(1, 499 "disks with more than 2^32-1 sectors are not supported"); 500 (void)lseek(f, (off_t)0, SEEK_SET); 501 if (read(f, bootarea, BBSIZE) != BBSIZE) 502 err(4, "%s read", specname); 503 close (f); 504 error = bsd_disklabel_le_dec( 505 bootarea + (labeloffset + labelsoffset * secsize), 506 &lab, MAXPARTITIONS); 507 if (flag && error) 508 errx(1, "%s: no valid label found", specname); 509 510 if (is_file) 511 return(0); 512 513 /* 514 * Compensate for absolute block addressing by finding the 515 * smallest partition offset and if the offset of the 'c' 516 * partition is equal to that, subtract it from all offsets. 517 */ 518 lba = ~0; 519 for (i = 0; i < lab.d_npartitions; i++) { 520 if (lab.d_partitions[i].p_size) 521 lba = MIN(lba, lab.d_partitions[i].p_offset); 522 } 523 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 524 for (i = 0; i < lab.d_npartitions; i++) { 525 if (lab.d_partitions[i].p_size) 526 lab.d_partitions[i].p_offset -= lba; 527 } 528 /* 529 * Save the offset so that we can write the label 530 * back with absolute block addresses. 531 */ 532 lba_offset = lba; 533 } 534 return (error); 535 } 536 537 538 static void 539 display(FILE *f, const struct disklabel *lp) 540 { 541 int i, j; 542 const struct partition *pp; 543 544 if (lp == NULL) 545 lp = &lab; 546 547 fprintf(f, "# %s:\n", specname); 548 if (allfields) { 549 if (lp->d_type < DKMAXTYPES) 550 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 551 else 552 fprintf(f, "type: %u\n", lp->d_type); 553 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 554 lp->d_typename); 555 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 556 lp->d_packname); 557 fprintf(f, "flags:"); 558 if (lp->d_flags & D_REMOVABLE) 559 fprintf(f, " removeable"); 560 if (lp->d_flags & D_ECC) 561 fprintf(f, " ecc"); 562 if (lp->d_flags & D_BADSECT) 563 fprintf(f, " badsect"); 564 fprintf(f, "\n"); 565 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 566 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 567 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 568 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 569 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 570 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 571 fprintf(f, "rpm: %u\n", lp->d_rpm); 572 fprintf(f, "interleave: %u\n", lp->d_interleave); 573 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 574 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 575 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 576 (u_long)lp->d_headswitch); 577 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 578 (u_long)lp->d_trkseek); 579 fprintf(f, "drivedata: "); 580 for (i = NDDATA - 1; i >= 0; i--) 581 if (lp->d_drivedata[i]) 582 break; 583 if (i < 0) 584 i = 0; 585 for (j = 0; j <= i; j++) 586 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 587 fprintf(f, "\n\n"); 588 } 589 fprintf(f, "%u partitions:\n", lp->d_npartitions); 590 fprintf(f, 591 "# size offset fstype [fsize bsize bps/cpg]\n"); 592 pp = lp->d_partitions; 593 for (i = 0; i < lp->d_npartitions; i++, pp++) { 594 if (pp->p_size) { 595 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 596 (u_long)pp->p_size, (u_long)pp->p_offset); 597 if (pp->p_fstype < FSMAXTYPES) 598 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 599 else 600 fprintf(f, "%8d", pp->p_fstype); 601 switch (pp->p_fstype) { 602 603 case FS_UNUSED: /* XXX */ 604 fprintf(f, " %5lu %5lu %5.5s ", 605 (u_long)pp->p_fsize, 606 (u_long)(pp->p_fsize * pp->p_frag), ""); 607 break; 608 609 case FS_BSDFFS: 610 fprintf(f, " %5lu %5lu %5u ", 611 (u_long)pp->p_fsize, 612 (u_long)(pp->p_fsize * pp->p_frag), 613 pp->p_cpg); 614 break; 615 616 case FS_BSDLFS: 617 fprintf(f, " %5lu %5lu %5d", 618 (u_long)pp->p_fsize, 619 (u_long)(pp->p_fsize * pp->p_frag), 620 pp->p_cpg); 621 break; 622 623 default: 624 fprintf(f, "%20.20s", ""); 625 break; 626 } 627 if (i == RAW_PART) { 628 fprintf(f, " # \"raw\" part, don't edit"); 629 } 630 fprintf(f, "\n"); 631 } 632 } 633 fflush(f); 634 } 635 636 static int 637 edit(void) 638 { 639 int c, fd; 640 struct disklabel label; 641 FILE *fp; 642 643 if ((fd = mkstemp(tmpfil)) == -1 || 644 (fp = fdopen(fd, "w")) == NULL) { 645 warnx("can't create %s", tmpfil); 646 return (1); 647 } 648 display(fp, NULL); 649 fclose(fp); 650 for (;;) { 651 if (!editit()) 652 break; 653 fp = fopen(tmpfil, "r"); 654 if (fp == NULL) { 655 warnx("can't reopen %s for reading", tmpfil); 656 break; 657 } 658 bzero((char *)&label, sizeof(label)); 659 c = getasciilabel(fp, &label); 660 fclose(fp); 661 if (c) { 662 lab = label; 663 if (writelabel() == 0) { 664 (void) unlink(tmpfil); 665 return (0); 666 } 667 } 668 printf("re-edit the label? [y]: "); 669 fflush(stdout); 670 c = getchar(); 671 if (c != EOF && c != (int)'\n') 672 while (getchar() != (int)'\n') 673 ; 674 if (c == (int)'n') 675 break; 676 } 677 (void) unlink(tmpfil); 678 return (1); 679 } 680 681 static int 682 editit(void) 683 { 684 int pid, xpid; 685 int locstat, omask; 686 const char *ed; 687 688 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 689 while ((pid = fork()) < 0) { 690 if (errno == EPROCLIM) { 691 warnx("you have too many processes"); 692 return(0); 693 } 694 if (errno != EAGAIN) { 695 warn("fork"); 696 return(0); 697 } 698 sleep(1); 699 } 700 if (pid == 0) { 701 sigsetmask(omask); 702 setgid(getgid()); 703 setuid(getuid()); 704 if ((ed = getenv("EDITOR")) == (char *)0) 705 ed = DEFEDITOR; 706 execlp(ed, ed, tmpfil, (char *)0); 707 err(1, "%s", ed); 708 } 709 while ((xpid = wait(&locstat)) >= 0) 710 if (xpid == pid) 711 break; 712 sigsetmask(omask); 713 return(!locstat); 714 } 715 716 static char * 717 skip(char *cp) 718 { 719 720 while (*cp != '\0' && isspace(*cp)) 721 cp++; 722 if (*cp == '\0' || *cp == '#') 723 return (NULL); 724 return (cp); 725 } 726 727 static char * 728 word(char *cp) 729 { 730 char c; 731 732 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 733 cp++; 734 if ((c = *cp) != '\0') { 735 *cp++ = '\0'; 736 if (c != '#') 737 return (skip(cp)); 738 } 739 return (NULL); 740 } 741 742 /* 743 * Read an ascii label in from fd f, 744 * in the same format as that put out by display(), 745 * and fill in lp. 746 */ 747 static int 748 getasciilabel(FILE *f, struct disklabel *lp) 749 { 750 char *cp; 751 const char **cpp; 752 u_int part; 753 char *tp, line[BUFSIZ]; 754 u_long v; 755 int lineno = 0, errors = 0; 756 int i; 757 758 makelabel("auto", lp); 759 bzero(&part_set, sizeof(part_set)); 760 bzero(&part_size_type, sizeof(part_size_type)); 761 bzero(&part_offset_type, sizeof(part_offset_type)); 762 lp->d_bbsize = BBSIZE; /* XXX */ 763 lp->d_sbsize = 0; /* XXX */ 764 while (fgets(line, sizeof(line) - 1, f)) { 765 lineno++; 766 if ((cp = index(line,'\n')) != 0) 767 *cp = '\0'; 768 cp = skip(line); 769 if (cp == NULL) 770 continue; 771 tp = index(cp, ':'); 772 if (tp == NULL) { 773 fprintf(stderr, "line %d: syntax error\n", lineno); 774 errors++; 775 continue; 776 } 777 *tp++ = '\0', tp = skip(tp); 778 if (!strcmp(cp, "type")) { 779 if (tp == NULL) 780 tp = unknown; 781 cpp = dktypenames; 782 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 783 if (*cpp && !strcmp(*cpp, tp)) { 784 lp->d_type = cpp - dktypenames; 785 break; 786 } 787 if (cpp < &dktypenames[DKMAXTYPES]) 788 continue; 789 v = strtoul(tp, NULL, 10); 790 if (v >= DKMAXTYPES) 791 fprintf(stderr, "line %d:%s %lu\n", lineno, 792 "Warning, unknown disk type", v); 793 lp->d_type = v; 794 continue; 795 } 796 if (!strcmp(cp, "flags")) { 797 for (v = 0; (cp = tp) && *cp != '\0';) { 798 tp = word(cp); 799 if (!strcmp(cp, "removeable")) 800 v |= D_REMOVABLE; 801 else if (!strcmp(cp, "ecc")) 802 v |= D_ECC; 803 else if (!strcmp(cp, "badsect")) 804 v |= D_BADSECT; 805 else { 806 fprintf(stderr, 807 "line %d: %s: bad flag\n", 808 lineno, cp); 809 errors++; 810 } 811 } 812 lp->d_flags = v; 813 continue; 814 } 815 if (!strcmp(cp, "drivedata")) { 816 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 817 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 818 tp = word(cp); 819 } 820 continue; 821 } 822 if (sscanf(cp, "%lu partitions", &v) == 1) { 823 if (v == 0 || v > MAXPARTITIONS) { 824 fprintf(stderr, 825 "line %d: bad # of partitions\n", lineno); 826 lp->d_npartitions = MAXPARTITIONS; 827 errors++; 828 } else 829 lp->d_npartitions = v; 830 continue; 831 } 832 if (tp == NULL) 833 tp = blank; 834 if (!strcmp(cp, "disk")) { 835 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 836 continue; 837 } 838 if (!strcmp(cp, "label")) { 839 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 840 continue; 841 } 842 if (!strcmp(cp, "bytes/sector")) { 843 v = strtoul(tp, NULL, 10); 844 if (v == 0 || (v % DEV_BSIZE) != 0) { 845 fprintf(stderr, 846 "line %d: %s: bad sector size\n", 847 lineno, tp); 848 errors++; 849 } else 850 lp->d_secsize = v; 851 continue; 852 } 853 if (!strcmp(cp, "sectors/track")) { 854 v = strtoul(tp, NULL, 10); 855 #if (ULONG_MAX != 0xffffffffUL) 856 if (v == 0 || v > 0xffffffff) 857 #else 858 if (v == 0) 859 #endif 860 { 861 fprintf(stderr, "line %d: %s: bad %s\n", 862 lineno, tp, cp); 863 errors++; 864 } else 865 lp->d_nsectors = v; 866 continue; 867 } 868 if (!strcmp(cp, "sectors/cylinder")) { 869 v = strtoul(tp, NULL, 10); 870 if (v == 0) { 871 fprintf(stderr, "line %d: %s: bad %s\n", 872 lineno, tp, cp); 873 errors++; 874 } else 875 lp->d_secpercyl = v; 876 continue; 877 } 878 if (!strcmp(cp, "tracks/cylinder")) { 879 v = strtoul(tp, NULL, 10); 880 if (v == 0) { 881 fprintf(stderr, "line %d: %s: bad %s\n", 882 lineno, tp, cp); 883 errors++; 884 } else 885 lp->d_ntracks = v; 886 continue; 887 } 888 if (!strcmp(cp, "cylinders")) { 889 v = strtoul(tp, NULL, 10); 890 if (v == 0) { 891 fprintf(stderr, "line %d: %s: bad %s\n", 892 lineno, tp, cp); 893 errors++; 894 } else 895 lp->d_ncylinders = v; 896 continue; 897 } 898 if (!strcmp(cp, "sectors/unit")) { 899 v = strtoul(tp, NULL, 10); 900 if (v == 0) { 901 fprintf(stderr, "line %d: %s: bad %s\n", 902 lineno, tp, cp); 903 errors++; 904 } else 905 lp->d_secperunit = v; 906 continue; 907 } 908 if (!strcmp(cp, "rpm")) { 909 v = strtoul(tp, NULL, 10); 910 if (v == 0 || v > USHRT_MAX) { 911 fprintf(stderr, "line %d: %s: bad %s\n", 912 lineno, tp, cp); 913 errors++; 914 } else 915 lp->d_rpm = v; 916 continue; 917 } 918 if (!strcmp(cp, "interleave")) { 919 v = strtoul(tp, NULL, 10); 920 if (v == 0 || v > USHRT_MAX) { 921 fprintf(stderr, "line %d: %s: bad %s\n", 922 lineno, tp, cp); 923 errors++; 924 } else 925 lp->d_interleave = v; 926 continue; 927 } 928 if (!strcmp(cp, "trackskew")) { 929 v = strtoul(tp, NULL, 10); 930 if (v > USHRT_MAX) { 931 fprintf(stderr, "line %d: %s: bad %s\n", 932 lineno, tp, cp); 933 errors++; 934 } else 935 lp->d_trackskew = v; 936 continue; 937 } 938 if (!strcmp(cp, "cylinderskew")) { 939 v = strtoul(tp, NULL, 10); 940 if (v > USHRT_MAX) { 941 fprintf(stderr, "line %d: %s: bad %s\n", 942 lineno, tp, cp); 943 errors++; 944 } else 945 lp->d_cylskew = v; 946 continue; 947 } 948 if (!strcmp(cp, "headswitch")) { 949 v = strtoul(tp, NULL, 10); 950 lp->d_headswitch = v; 951 continue; 952 } 953 if (!strcmp(cp, "track-to-track seek")) { 954 v = strtoul(tp, NULL, 10); 955 lp->d_trkseek = v; 956 continue; 957 } 958 /* the ':' was removed above */ 959 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 960 fprintf(stderr, 961 "line %d: %s: Unknown disklabel field\n", lineno, 962 cp); 963 errors++; 964 continue; 965 } 966 967 /* Process a partition specification line. */ 968 part = *cp - 'a'; 969 if (part >= lp->d_npartitions) { 970 fprintf(stderr, 971 "line %d: partition name out of range a-%c: %s\n", 972 lineno, 'a' + lp->d_npartitions - 1, cp); 973 errors++; 974 continue; 975 } 976 part_set[part] = 1; 977 978 if (getasciipartspec(tp, lp, part, lineno) != 0) { 979 errors++; 980 break; 981 } 982 } 983 errors += checklabel(lp); 984 return (errors == 0); 985 } 986 987 #define NXTNUM(n) do { \ 988 if (tp == NULL) { \ 989 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 990 return (1); \ 991 } else { \ 992 cp = tp, tp = word(cp); \ 993 (n) = strtoul(cp, NULL, 10); \ 994 } \ 995 } while (0) 996 997 /* retain 1 character following number */ 998 #define NXTWORD(w,n) do { \ 999 if (tp == NULL) { \ 1000 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1001 return (1); \ 1002 } else { \ 1003 char *tmp; \ 1004 cp = tp, tp = word(cp); \ 1005 (n) = strtoul(cp, &tmp, 10); \ 1006 if (tmp) (w) = *tmp; \ 1007 } \ 1008 } while (0) 1009 1010 /* 1011 * Read a partition line into partition `part' in the specified disklabel. 1012 * Return 0 on success, 1 on failure. 1013 */ 1014 static int 1015 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1016 { 1017 struct partition *pp; 1018 char *cp; 1019 const char **cpp; 1020 u_long v; 1021 1022 pp = &lp->d_partitions[part]; 1023 cp = NULL; 1024 1025 v = 0; 1026 NXTWORD(part_size_type[part],v); 1027 if (v == 0 && part_size_type[part] != '*') { 1028 fprintf(stderr, 1029 "line %d: %s: bad partition size\n", lineno, cp); 1030 return (1); 1031 } 1032 pp->p_size = v; 1033 1034 v = 0; 1035 NXTWORD(part_offset_type[part],v); 1036 if (v == 0 && part_offset_type[part] != '*' && 1037 part_offset_type[part] != '\0') { 1038 fprintf(stderr, 1039 "line %d: %s: bad partition offset\n", lineno, cp); 1040 return (1); 1041 } 1042 pp->p_offset = v; 1043 if (tp == NULL) { 1044 fprintf(stderr, "line %d: missing file system type\n", lineno); 1045 return (1); 1046 } 1047 cp = tp, tp = word(cp); 1048 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1049 if (*cpp && !strcmp(*cpp, cp)) 1050 break; 1051 if (*cpp != NULL) { 1052 pp->p_fstype = cpp - fstypenames; 1053 } else { 1054 if (isdigit(*cp)) 1055 v = strtoul(cp, NULL, 10); 1056 else 1057 v = FSMAXTYPES; 1058 if (v >= FSMAXTYPES) { 1059 fprintf(stderr, 1060 "line %d: Warning, unknown file system type %s\n", 1061 lineno, cp); 1062 v = FS_UNUSED; 1063 } 1064 pp->p_fstype = v; 1065 } 1066 1067 switch (pp->p_fstype) { 1068 case FS_UNUSED: 1069 case FS_BSDFFS: 1070 case FS_BSDLFS: 1071 /* accept defaults for fsize/frag/cpg */ 1072 if (tp) { 1073 NXTNUM(pp->p_fsize); 1074 if (pp->p_fsize == 0) 1075 break; 1076 NXTNUM(v); 1077 pp->p_frag = v / pp->p_fsize; 1078 if (tp != NULL) 1079 NXTNUM(pp->p_cpg); 1080 } 1081 /* else default to 0's */ 1082 break; 1083 default: 1084 break; 1085 } 1086 return (0); 1087 } 1088 1089 /* 1090 * Check disklabel for errors and fill in 1091 * derived fields according to supplied values. 1092 */ 1093 static int 1094 checklabel(struct disklabel *lp) 1095 { 1096 struct partition *pp; 1097 int i, errors = 0; 1098 char part; 1099 u_long base_offset, needed, total_size, total_percent, current_offset; 1100 long free_space; 1101 int seen_default_offset; 1102 int hog_part; 1103 int j; 1104 struct partition *pp2; 1105 1106 if (lp == NULL) 1107 lp = &lab; 1108 1109 if (allfields) { 1110 1111 if (lp->d_secsize == 0) { 1112 fprintf(stderr, "sector size 0\n"); 1113 return (1); 1114 } 1115 if (lp->d_nsectors == 0) { 1116 fprintf(stderr, "sectors/track 0\n"); 1117 return (1); 1118 } 1119 if (lp->d_ntracks == 0) { 1120 fprintf(stderr, "tracks/cylinder 0\n"); 1121 return (1); 1122 } 1123 if (lp->d_ncylinders == 0) { 1124 fprintf(stderr, "cylinders/unit 0\n"); 1125 errors++; 1126 } 1127 if (lp->d_rpm == 0) 1128 warnx("revolutions/minute 0"); 1129 if (lp->d_secpercyl == 0) 1130 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1131 if (lp->d_secperunit == 0) 1132 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1133 if (lp->d_bbsize == 0) { 1134 fprintf(stderr, "boot block size 0\n"); 1135 errors++; 1136 } else if (lp->d_bbsize % lp->d_secsize) 1137 warnx("boot block size %% sector-size != 0"); 1138 if (lp->d_npartitions > MAXPARTITIONS) 1139 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1140 (u_long)lp->d_npartitions, MAXPARTITIONS); 1141 } else { 1142 struct disklabel *vl; 1143 1144 vl = getvirginlabel(); 1145 lp->d_secsize = vl->d_secsize; 1146 lp->d_nsectors = vl->d_nsectors; 1147 lp->d_ntracks = vl->d_ntracks; 1148 lp->d_ncylinders = vl->d_ncylinders; 1149 lp->d_rpm = vl->d_rpm; 1150 lp->d_interleave = vl->d_interleave; 1151 lp->d_secpercyl = vl->d_secpercyl; 1152 lp->d_secperunit = vl->d_secperunit; 1153 lp->d_bbsize = vl->d_bbsize; 1154 lp->d_npartitions = vl->d_npartitions; 1155 } 1156 1157 1158 /* first allocate space to the partitions, then offsets */ 1159 total_size = 0; /* in sectors */ 1160 total_percent = 0; /* in percent */ 1161 hog_part = -1; 1162 /* find all fixed partitions */ 1163 for (i = 0; i < lp->d_npartitions; i++) { 1164 pp = &lp->d_partitions[i]; 1165 if (part_set[i]) { 1166 if (part_size_type[i] == '*') { 1167 if (i == RAW_PART) { 1168 pp->p_size = lp->d_secperunit; 1169 } else { 1170 if (hog_part != -1) 1171 warnx("Too many '*' partitions (%c and %c)", 1172 hog_part + 'a',i + 'a'); 1173 else 1174 hog_part = i; 1175 } 1176 } else { 1177 off_t size; 1178 1179 size = pp->p_size; 1180 switch (part_size_type[i]) { 1181 case '%': 1182 total_percent += size; 1183 break; 1184 case 't': 1185 case 'T': 1186 size *= 1024ULL; 1187 /* FALLTHROUGH */ 1188 case 'g': 1189 case 'G': 1190 size *= 1024ULL; 1191 /* FALLTHROUGH */ 1192 case 'm': 1193 case 'M': 1194 size *= 1024ULL; 1195 /* FALLTHROUGH */ 1196 case 'k': 1197 case 'K': 1198 size *= 1024ULL; 1199 break; 1200 case '\0': 1201 break; 1202 default: 1203 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1204 part_size_type[i], i + 'a'); 1205 break; 1206 } 1207 /* don't count %'s yet */ 1208 if (part_size_type[i] != '%') { 1209 /* 1210 * for all not in sectors, convert to 1211 * sectors 1212 */ 1213 if (part_size_type[i] != '\0') { 1214 if (size % lp->d_secsize != 0) 1215 warnx("partition %c not an integer number of sectors", 1216 i + 'a'); 1217 size /= lp->d_secsize; 1218 pp->p_size = size; 1219 } 1220 /* else already in sectors */ 1221 if (i != RAW_PART) 1222 total_size += size; 1223 } 1224 } 1225 } 1226 } 1227 1228 /* Find out the total free space, excluding the boot block area. */ 1229 base_offset = BBSIZE / secsize; 1230 free_space = 0; 1231 for (i = 0; i < lp->d_npartitions; i++) { 1232 pp = &lp->d_partitions[i]; 1233 if (!part_set[i] || i == RAW_PART || 1234 part_size_type[i] == '%' || part_size_type[i] == '*') 1235 continue; 1236 if (pp->p_offset > base_offset) 1237 free_space += pp->p_offset - base_offset; 1238 if (pp->p_offset + pp->p_size > base_offset) 1239 base_offset = pp->p_offset + pp->p_size; 1240 } 1241 if (base_offset < lp->d_secperunit) 1242 free_space += lp->d_secperunit - base_offset; 1243 1244 /* handle % partitions - note %'s don't need to add up to 100! */ 1245 if (total_percent != 0) { 1246 if (total_percent > 100) { 1247 fprintf(stderr,"total percentage %lu is greater than 100\n", 1248 total_percent); 1249 errors++; 1250 } 1251 1252 if (free_space > 0) { 1253 for (i = 0; i < lp->d_npartitions; i++) { 1254 pp = &lp->d_partitions[i]; 1255 if (part_set[i] && part_size_type[i] == '%') { 1256 /* careful of overflows! and integer roundoff */ 1257 pp->p_size = ((double)pp->p_size/100) * free_space; 1258 total_size += pp->p_size; 1259 1260 /* FIX we can lose a sector or so due to roundoff per 1261 partition. A more complex algorithm could avoid that */ 1262 } 1263 } 1264 } else { 1265 fprintf(stderr, 1266 "%ld sectors available to give to '*' and '%%' partitions\n", 1267 free_space); 1268 errors++; 1269 /* fix? set all % partitions to size 0? */ 1270 } 1271 } 1272 /* give anything remaining to the hog partition */ 1273 if (hog_part != -1) { 1274 /* 1275 * Find the range of offsets usable by '*' partitions around 1276 * the hog partition and how much space they need. 1277 */ 1278 needed = 0; 1279 base_offset = BBSIZE / secsize; 1280 for (i = hog_part - 1; i >= 0; i--) { 1281 pp = &lp->d_partitions[i]; 1282 if (!part_set[i] || i == RAW_PART) 1283 continue; 1284 if (part_offset_type[i] == '*') { 1285 needed += pp->p_size; 1286 continue; 1287 } 1288 base_offset = pp->p_offset + pp->p_size; 1289 break; 1290 } 1291 current_offset = lp->d_secperunit; 1292 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1293 pp = &lp->d_partitions[i]; 1294 if (!part_set[i] || i == RAW_PART) 1295 continue; 1296 if (part_offset_type[i] == '*') { 1297 needed += pp->p_size; 1298 continue; 1299 } 1300 current_offset = pp->p_offset; 1301 } 1302 1303 if (current_offset - base_offset <= needed) { 1304 fprintf(stderr, "Cannot find space for partition %c\n", 1305 hog_part + 'a'); 1306 fprintf(stderr, 1307 "Need more than %lu sectors between %lu and %lu\n", 1308 needed, base_offset, current_offset); 1309 errors++; 1310 lp->d_partitions[hog_part].p_size = 0; 1311 } else { 1312 lp->d_partitions[hog_part].p_size = current_offset - 1313 base_offset - needed; 1314 total_size += lp->d_partitions[hog_part].p_size; 1315 } 1316 } 1317 1318 /* Now set the offsets for each partition */ 1319 current_offset = BBSIZE / secsize; /* in sectors */ 1320 seen_default_offset = 0; 1321 for (i = 0; i < lp->d_npartitions; i++) { 1322 part = 'a' + i; 1323 pp = &lp->d_partitions[i]; 1324 if (part_set[i]) { 1325 if (part_offset_type[i] == '*') { 1326 if (i == RAW_PART) { 1327 pp->p_offset = 0; 1328 } else { 1329 pp->p_offset = current_offset; 1330 seen_default_offset = 1; 1331 } 1332 } else { 1333 /* allow them to be out of order for old-style tables */ 1334 if (pp->p_offset < current_offset && 1335 seen_default_offset && i != RAW_PART && 1336 pp->p_fstype != FS_VINUM) { 1337 fprintf(stderr, 1338 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1339 (long)pp->p_offset,i+'a',current_offset); 1340 fprintf(stderr, 1341 "Labels with any *'s for offset must be in ascending order by sector\n"); 1342 errors++; 1343 } else if (pp->p_offset != current_offset && 1344 i != RAW_PART && seen_default_offset) { 1345 /* 1346 * this may give unneeded warnings if 1347 * partitions are out-of-order 1348 */ 1349 warnx( 1350 "Offset %ld for partition %c doesn't match expected value %ld", 1351 (long)pp->p_offset, i + 'a', current_offset); 1352 } 1353 } 1354 if (i != RAW_PART) 1355 current_offset = pp->p_offset + pp->p_size; 1356 } 1357 } 1358 1359 for (i = 0; i < lp->d_npartitions; i++) { 1360 part = 'a' + i; 1361 pp = &lp->d_partitions[i]; 1362 if (pp->p_size == 0 && pp->p_offset != 0) 1363 warnx("partition %c: size 0, but offset %lu", 1364 part, (u_long)pp->p_offset); 1365 #ifdef notdef 1366 if (pp->p_size % lp->d_secpercyl) 1367 warnx("partition %c: size %% cylinder-size != 0", 1368 part); 1369 if (pp->p_offset % lp->d_secpercyl) 1370 warnx("partition %c: offset %% cylinder-size != 0", 1371 part); 1372 #endif 1373 if (pp->p_offset > lp->d_secperunit) { 1374 fprintf(stderr, 1375 "partition %c: offset past end of unit\n", part); 1376 errors++; 1377 } 1378 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1379 fprintf(stderr, 1380 "partition %c: partition extends past end of unit\n", 1381 part); 1382 errors++; 1383 } 1384 if (i == RAW_PART) { 1385 if (pp->p_fstype != FS_UNUSED) 1386 warnx("partition %c is not marked as unused!",part); 1387 if (pp->p_offset != 0) 1388 warnx("partition %c doesn't start at 0!",part); 1389 if (pp->p_size != lp->d_secperunit) 1390 warnx("partition %c doesn't cover the whole unit!",part); 1391 1392 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1393 (pp->p_size != lp->d_secperunit)) { 1394 warnx("An incorrect partition %c may cause problems for " 1395 "standard system utilities",part); 1396 } 1397 } 1398 1399 /* check for overlaps */ 1400 /* this will check for all possible overlaps once and only once */ 1401 for (j = 0; j < i; j++) { 1402 pp2 = &lp->d_partitions[j]; 1403 if (j != RAW_PART && i != RAW_PART && 1404 pp->p_fstype != FS_VINUM && 1405 pp2->p_fstype != FS_VINUM && 1406 part_set[i] && part_set[j]) { 1407 if (pp2->p_offset < pp->p_offset + pp->p_size && 1408 (pp2->p_offset + pp2->p_size > pp->p_offset || 1409 pp2->p_offset >= pp->p_offset)) { 1410 fprintf(stderr,"partitions %c and %c overlap!\n", 1411 j + 'a', i + 'a'); 1412 errors++; 1413 } 1414 } 1415 } 1416 } 1417 for (; i < lp->d_npartitions; i++) { 1418 part = 'a' + i; 1419 pp = &lp->d_partitions[i]; 1420 if (pp->p_size || pp->p_offset) 1421 warnx("unused partition %c: size %d offset %lu", 1422 'a' + i, pp->p_size, (u_long)pp->p_offset); 1423 } 1424 return (errors); 1425 } 1426 1427 /* 1428 * When operating on a "virgin" disk, try getting an initial label 1429 * from the associated device driver. This might work for all device 1430 * drivers that are able to fetch some initial device parameters 1431 * without even having access to a (BSD) disklabel, like SCSI disks, 1432 * most IDE drives, or vn devices. 1433 * 1434 * The device name must be given in its "canonical" form. 1435 */ 1436 static struct disklabel * 1437 getvirginlabel(void) 1438 { 1439 static struct disklabel loclab; 1440 struct partition *dp; 1441 int f; 1442 u_int u; 1443 1444 if ((f = open(specname, O_RDONLY)) == -1) { 1445 warn("cannot open %s", specname); 1446 return (NULL); 1447 } 1448 1449 if (is_file) 1450 get_file_parms(f); 1451 else { 1452 mediasize = g_mediasize(f); 1453 secsize = g_sectorsize(f); 1454 if (secsize < 0 || mediasize < 0) { 1455 close (f); 1456 return (NULL); 1457 } 1458 } 1459 memset(&loclab, 0, sizeof loclab); 1460 loclab.d_magic = DISKMAGIC; 1461 loclab.d_magic2 = DISKMAGIC; 1462 loclab.d_secsize = secsize; 1463 loclab.d_secperunit = mediasize / secsize; 1464 1465 /* 1466 * Nobody in these enligthened days uses the CHS geometry for 1467 * anything, but nontheless try to get it right. If we fail 1468 * to get any good ideas from the device, construct something 1469 * which is IBM-PC friendly. 1470 */ 1471 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1472 loclab.d_nsectors = u; 1473 else 1474 loclab.d_nsectors = 63; 1475 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1476 loclab.d_ntracks = u; 1477 else if (loclab.d_secperunit <= 63*1*1024) 1478 loclab.d_ntracks = 1; 1479 else if (loclab.d_secperunit <= 63*16*1024) 1480 loclab.d_ntracks = 16; 1481 else 1482 loclab.d_ntracks = 255; 1483 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1484 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1485 loclab.d_npartitions = DEFPARTITIONS; 1486 1487 /* Various (unneeded) compat stuff */ 1488 loclab.d_rpm = 3600; 1489 loclab.d_bbsize = BBSIZE; 1490 loclab.d_interleave = 1; 1491 strncpy(loclab.d_typename, "amnesiac", 1492 sizeof(loclab.d_typename)); 1493 1494 dp = &loclab.d_partitions[RAW_PART]; 1495 dp->p_size = loclab.d_secperunit; 1496 loclab.d_checksum = dkcksum(&loclab); 1497 close (f); 1498 return (&loclab); 1499 } 1500 1501 static void 1502 usage(void) 1503 { 1504 1505 fprintf(stderr, 1506 "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1507 "usage: bsdlabel disk", 1508 "\t\t(to read label)", 1509 " bsdlabel -w [-n] [-m machine] disk [type]", 1510 "\t\t(to write label with existing boot program)", 1511 " bsdlabel -e [-n] [-m machine] disk", 1512 "\t\t(to edit label)", 1513 " bsdlabel -R [-n] [-m machine] disk protofile", 1514 "\t\t(to restore label with existing boot program)", 1515 " bsdlabel -B [-b boot] [-m machine] disk", 1516 "\t\t(to install boot program with existing on-disk label)", 1517 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1518 "\t\t(to write label and install boot program)", 1519 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1520 "\t\t(to restore label and install boot program)" 1521 ); 1522 exit(1); 1523 } 1524