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