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