1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1994, 1995 Gordon W. Ross 5 * Copyright (c) 1994 Theo de Raadt 6 * All rights reserved. 7 * Copyright (c) 1987, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Symmetric Computer Systems. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * This product includes software developed by Theo de Raadt. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $ 43 */ 44 45 #include <sys/param.h> 46 #include <stdint.h> 47 #include <sys/file.h> 48 #include <sys/stat.h> 49 #include <sys/wait.h> 50 #include <sys/disk.h> 51 #define DKTYPENAMES 52 #define FSTYPENAMES 53 #define MAXPARTITIONS 8 /* XXX should be 20, but see PR276517 */ 54 #include <sys/disklabel.h> 55 56 #include <unistd.h> 57 #include <string.h> 58 #include <stdio.h> 59 #include <libgeom.h> 60 #include <stdlib.h> 61 #include <signal.h> 62 #include <stdarg.h> 63 #include <ctype.h> 64 #include <err.h> 65 #include <errno.h> 66 67 #include "pathnames.h" 68 69 static void makelabel(const char *, struct disklabel *); 70 static int geom_class_available(const char *); 71 static int writelabel(void); 72 static int readlabel(int flag); 73 static void display(FILE *, const struct disklabel *); 74 static int edit(void); 75 static int editit(void); 76 static void fixlabel(struct disklabel *); 77 static char *skip(char *); 78 static char *word(char *); 79 static int getasciilabel(FILE *, struct disklabel *); 80 static int getasciipartspec(char *, struct disklabel *, int, int); 81 static int checklabel(struct disklabel *); 82 static void usage(void); 83 static struct disklabel *getvirginlabel(void); 84 85 #define DEFEDITOR _PATH_VI 86 #define DEFPARTITIONS 8 87 88 static char *specname; 89 static char *pname; 90 static char tmpfil[] = PATH_TMPFILE; 91 92 static struct disklabel lab; 93 static u_char bootarea[BBSIZE]; 94 static off_t mediasize; 95 static ssize_t secsize; 96 static char blank[] = ""; 97 static char unknown[] = "unknown"; 98 99 #define MAX_PART ('z') 100 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 101 static char part_size_type[MAX_NUM_PARTS]; 102 static char part_offset_type[MAX_NUM_PARTS]; 103 static int part_set[MAX_NUM_PARTS]; 104 105 static int installboot; /* non-zero if we should install a boot program */ 106 static int allfields; /* present all fields in edit */ 107 static char const *xxboot; /* primary boot */ 108 109 static uint32_t lba_offset; 110 #ifndef LABELSECTOR 111 #define LABELSECTOR -1 112 #endif 113 #ifndef LABELOFFSET 114 #define LABELOFFSET -1 115 #endif 116 static int labelsoffset = LABELSECTOR; 117 static int labeloffset = LABELOFFSET; 118 static int bbsize = BBSIZE; 119 120 static enum { 121 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 122 } op = UNSPEC; 123 124 125 static int disable_write; /* set to disable writing to disk label */ 126 static int is_file; /* work on a file (abs. pathname), "-f" opt. */ 127 128 int 129 main(int argc, char *argv[]) 130 { 131 FILE *t; 132 int ch, error, fd; 133 const char *name; 134 135 error = 0; 136 name = NULL; 137 138 fprintf(stderr, 139 "WARNING: bsdlabel is deprecated and is not available in FreeBSD 15 or later.\n" 140 "Please use gpart instead.\n\n"); 141 142 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1) 143 switch (ch) { 144 case 'A': 145 allfields = 1; 146 break; 147 case 'B': 148 ++installboot; 149 break; 150 case 'b': 151 xxboot = optarg; 152 break; 153 case 'f': 154 is_file=1; 155 break; 156 case 'm': 157 if (!strcmp(optarg, "i386") || 158 !strcmp(optarg, "amd64")) { 159 labelsoffset = 1; 160 labeloffset = 0; 161 bbsize = 8192; 162 } else { 163 errx(1, "Unsupported architecture"); 164 } 165 break; 166 case 'n': 167 disable_write = 1; 168 break; 169 case 'R': 170 if (op != UNSPEC) 171 usage(); 172 op = RESTORE; 173 break; 174 case 'e': 175 if (op != UNSPEC) 176 usage(); 177 op = EDIT; 178 break; 179 case 'r': 180 /* 181 * We accept and ignore -r for compatibility with 182 * historical disklabel usage. 183 */ 184 break; 185 case 'w': 186 if (op != UNSPEC) 187 usage(); 188 op = WRITE; 189 break; 190 case '?': 191 default: 192 usage(); 193 } 194 argc -= optind; 195 argv += optind; 196 197 if (argc < 1) 198 usage(); 199 if (labelsoffset < 0 || labeloffset < 0) 200 errx(1, "a -m <architecture> option must be specified"); 201 202 /* Figure out the names of the thing we're working on */ 203 if (is_file) { 204 specname = argv[0]; 205 } else { 206 specname = g_device_path(argv[0]); 207 if (specname == NULL) { 208 warn("unable to get correct path for %s", argv[0]); 209 return(1); 210 } 211 fd = open(specname, O_RDONLY); 212 if (fd < 0) { 213 warn("error opening %s", specname); 214 return(1); 215 } 216 pname = g_providername(fd); 217 if (pname == NULL) { 218 warn("error getting providername for %s", specname); 219 close(fd); 220 return(1); 221 } 222 close(fd); 223 } 224 225 if (installboot && op == UNSPEC) 226 op = WRITEBOOT; 227 else if (op == UNSPEC) 228 op = READ; 229 230 switch(op) { 231 232 case UNSPEC: 233 break; 234 235 case EDIT: 236 if (argc != 1) 237 usage(); 238 readlabel(1); 239 fixlabel(&lab); 240 error = edit(); 241 break; 242 243 case READ: 244 if (argc != 1) 245 usage(); 246 readlabel(1); 247 display(stdout, NULL); 248 error = checklabel(NULL); 249 break; 250 251 case RESTORE: 252 if (argc != 2) 253 usage(); 254 if (!(t = fopen(argv[1], "r"))) 255 err(4, "fopen %s", argv[1]); 256 readlabel(0); 257 if (!getasciilabel(t, &lab)) 258 exit(1); 259 error = writelabel(); 260 break; 261 262 case WRITE: 263 if (argc == 2) 264 name = argv[1]; 265 else if (argc == 1) 266 name = "auto"; 267 else 268 usage(); 269 readlabel(0); 270 makelabel(name, &lab); 271 fixlabel(&lab); 272 if (checklabel(NULL) == 0) 273 error = writelabel(); 274 break; 275 276 case WRITEBOOT: 277 278 readlabel(1); 279 fixlabel(&lab); 280 if (argc == 2) 281 makelabel(argv[1], &lab); 282 if (checklabel(NULL) == 0) 283 error = writelabel(); 284 break; 285 } 286 exit(error); 287 } 288 289 static void 290 fixlabel(struct disklabel *lp) 291 { 292 struct partition *dp; 293 int i; 294 295 for (i = 0; i < lp->d_npartitions; i++) { 296 if (i == RAW_PART) 297 continue; 298 if (lp->d_partitions[i].p_size) 299 return; 300 } 301 302 dp = &lp->d_partitions[0]; 303 dp->p_offset = BBSIZE / secsize; 304 dp->p_size = lp->d_secperunit - dp->p_offset; 305 } 306 307 /* 308 * Construct a prototype disklabel from /etc/disktab. 309 */ 310 static void 311 makelabel(const char *type, struct disklabel *lp) 312 { 313 struct disklabel *dp; 314 315 if (strcmp(type, "auto") == 0) 316 dp = getvirginlabel(); 317 else 318 dp = getdiskbyname(type); 319 if (dp == NULL) 320 errx(1, "%s: unknown disk type", type); 321 *lp = *dp; 322 bzero(lp->d_packname, sizeof(lp->d_packname)); 323 } 324 325 static void 326 readboot(void) 327 { 328 int fd; 329 struct stat st; 330 331 if (xxboot == NULL) 332 xxboot = "/boot/boot"; 333 fd = open(xxboot, O_RDONLY); 334 if (fd < 0) 335 err(1, "cannot open %s", xxboot); 336 fstat(fd, &st); 337 if (st.st_size <= BBSIZE) { 338 if (read(fd, bootarea, st.st_size) != st.st_size) 339 err(1, "read error %s", xxboot); 340 close(fd); 341 return; 342 } 343 errx(1, "boot code %s is wrong size", xxboot); 344 } 345 346 static int 347 geom_class_available(const char *name) 348 { 349 struct gclass *class; 350 struct gmesh mesh; 351 int error; 352 353 error = geom_gettree(&mesh); 354 if (error != 0) 355 errc(1, error, "Cannot get GEOM tree"); 356 357 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 358 if (strcmp(class->lg_name, name) == 0) { 359 geom_deletetree(&mesh); 360 return (1); 361 } 362 } 363 364 geom_deletetree(&mesh); 365 366 return (0); 367 } 368 369 static int 370 writelabel(void) 371 { 372 int i, fd, serrno; 373 struct disklabel *lp = &lab; 374 375 if (disable_write) { 376 warnx("write to disk label suppressed - label was as follows:"); 377 display(stdout, NULL); 378 return (0); 379 } 380 381 lp->d_magic = DISKMAGIC; 382 lp->d_magic2 = DISKMAGIC; 383 lp->d_checksum = 0; 384 lp->d_checksum = dkcksum(lp); 385 if (installboot) 386 readboot(); 387 for (i = 0; i < lab.d_npartitions; i++) 388 if (lab.d_partitions[i].p_size) 389 lab.d_partitions[i].p_offset += lba_offset; 390 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize, 391 lp); 392 393 fd = open(specname, O_RDWR); 394 if (fd < 0) { 395 if (is_file) { 396 warn("cannot open file %s for writing label", specname); 397 return(1); 398 } else 399 serrno = errno; 400 401 if (geom_class_available("PART") != 0) { 402 /* 403 * Since we weren't able open provider for 404 * writing, then recommend user to use gpart(8). 405 */ 406 warnc(serrno, 407 "cannot open provider %s for writing label", 408 specname); 409 warnx("Try to use gpart(8)."); 410 return (1); 411 } 412 413 warnc(serrno, "%s", specname); 414 return (1); 415 } else { 416 if (write(fd, bootarea, bbsize) != bbsize) { 417 warn("write %s", specname); 418 close (fd); 419 return (1); 420 } 421 close (fd); 422 } 423 return (0); 424 } 425 426 static void 427 get_file_parms(int f) 428 { 429 int i; 430 struct stat sb; 431 432 if (fstat(f, &sb) != 0) 433 err(4, "fstat failed"); 434 i = sb.st_mode & S_IFMT; 435 if (i != S_IFREG && i != S_IFLNK) 436 errx(4, "%s is not a valid file or link", specname); 437 secsize = DEV_BSIZE; 438 mediasize = sb.st_size; 439 } 440 441 /* 442 * Fetch disklabel for disk. 443 */ 444 static int 445 readlabel(int flag) 446 { 447 ssize_t nbytes; 448 uint32_t lba; 449 int f, i; 450 int error; 451 452 f = open(specname, O_RDONLY); 453 if (f < 0) 454 err(1, "%s", specname); 455 if (is_file) 456 get_file_parms(f); 457 else { 458 mediasize = g_mediasize(f); 459 secsize = g_sectorsize(f); 460 if (secsize < 0 || mediasize < 0) 461 err(4, "cannot get disk geometry"); 462 } 463 if (mediasize > (off_t)0xffffffff * secsize) 464 errx(1, 465 "disks with more than 2^32-1 sectors are not supported"); 466 (void)lseek(f, (off_t)0, SEEK_SET); 467 nbytes = read(f, bootarea, BBSIZE); 468 if (nbytes == -1) 469 err(4, "%s read", specname); 470 if (nbytes != BBSIZE) 471 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 472 close (f); 473 error = bsd_disklabel_le_dec( 474 bootarea + (labeloffset + labelsoffset * secsize), 475 &lab, MAXPARTITIONS); 476 if (flag && error) 477 errx(1, "%s: no valid label found", specname); 478 479 if (is_file) 480 return(0); 481 482 /* 483 * Compensate for absolute block addressing by finding the 484 * smallest partition offset and if the offset of the 'c' 485 * partition is equal to that, subtract it from all offsets. 486 */ 487 lba = ~0; 488 for (i = 0; i < lab.d_npartitions; i++) { 489 if (lab.d_partitions[i].p_size) 490 lba = MIN(lba, lab.d_partitions[i].p_offset); 491 } 492 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 493 for (i = 0; i < lab.d_npartitions; i++) { 494 if (lab.d_partitions[i].p_size) 495 lab.d_partitions[i].p_offset -= lba; 496 } 497 /* 498 * Save the offset so that we can write the label 499 * back with absolute block addresses. 500 */ 501 lba_offset = lba; 502 } 503 return (error); 504 } 505 506 507 static void 508 display(FILE *f, const struct disklabel *lp) 509 { 510 int i, j; 511 const struct partition *pp; 512 513 if (lp == NULL) 514 lp = &lab; 515 516 fprintf(f, "# %s:\n", specname); 517 if (allfields) { 518 if (lp->d_type < DKMAXTYPES) 519 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 520 else 521 fprintf(f, "type: %u\n", lp->d_type); 522 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 523 lp->d_typename); 524 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 525 lp->d_packname); 526 fprintf(f, "flags:"); 527 if (lp->d_flags & D_REMOVABLE) 528 fprintf(f, " removeable"); 529 if (lp->d_flags & D_ECC) 530 fprintf(f, " ecc"); 531 if (lp->d_flags & D_BADSECT) 532 fprintf(f, " badsect"); 533 fprintf(f, "\n"); 534 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 535 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 536 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 537 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 538 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 539 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 540 fprintf(f, "rpm: %u\n", lp->d_rpm); 541 fprintf(f, "interleave: %u\n", lp->d_interleave); 542 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 543 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 544 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 545 (u_long)lp->d_headswitch); 546 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 547 (u_long)lp->d_trkseek); 548 fprintf(f, "drivedata: "); 549 for (i = NDDATA - 1; i >= 0; i--) 550 if (lp->d_drivedata[i]) 551 break; 552 if (i < 0) 553 i = 0; 554 for (j = 0; j <= i; j++) 555 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 556 fprintf(f, "\n\n"); 557 } 558 fprintf(f, "%u partitions:\n", lp->d_npartitions); 559 fprintf(f, 560 "# size offset fstype [fsize bsize bps/cpg]\n"); 561 pp = lp->d_partitions; 562 for (i = 0; i < lp->d_npartitions; i++, pp++) { 563 if (pp->p_size) { 564 fprintf(f, " %c: %10lu %10lu ", 'a' + i, 565 (u_long)pp->p_size, (u_long)pp->p_offset); 566 if (pp->p_fstype < FSMAXTYPES) 567 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 568 else 569 fprintf(f, "%8d", pp->p_fstype); 570 switch (pp->p_fstype) { 571 572 case FS_UNUSED: /* XXX */ 573 fprintf(f, " %5lu %5lu %2s", 574 (u_long)pp->p_fsize, 575 (u_long)(pp->p_fsize * pp->p_frag), ""); 576 break; 577 578 case FS_BSDFFS: 579 fprintf(f, " %5lu %5lu %5u", 580 (u_long)pp->p_fsize, 581 (u_long)(pp->p_fsize * pp->p_frag), 582 pp->p_cpg); 583 break; 584 585 case FS_BSDLFS: 586 fprintf(f, " %5lu %5lu %5d", 587 (u_long)pp->p_fsize, 588 (u_long)(pp->p_fsize * pp->p_frag), 589 pp->p_cpg); 590 break; 591 592 default: 593 fprintf(f, "%20.20s", ""); 594 break; 595 } 596 if (i == RAW_PART) { 597 fprintf(f, " # \"raw\" part, don't edit"); 598 } 599 fprintf(f, "\n"); 600 } 601 } 602 fflush(f); 603 } 604 605 static int 606 edit(void) 607 { 608 int c, fd; 609 struct disklabel label; 610 FILE *fp; 611 612 if ((fd = mkstemp(tmpfil)) == -1 || 613 (fp = fdopen(fd, "w")) == NULL) { 614 warnx("can't create %s", tmpfil); 615 return (1); 616 } 617 display(fp, NULL); 618 fclose(fp); 619 for (;;) { 620 if (!editit()) 621 break; 622 fp = fopen(tmpfil, "r"); 623 if (fp == NULL) { 624 warnx("can't reopen %s for reading", tmpfil); 625 break; 626 } 627 bzero((char *)&label, sizeof(label)); 628 c = getasciilabel(fp, &label); 629 fclose(fp); 630 if (c) { 631 lab = label; 632 if (writelabel() == 0) { 633 (void) unlink(tmpfil); 634 return (0); 635 } 636 } 637 printf("re-edit the label? [y]: "); 638 fflush(stdout); 639 c = getchar(); 640 if (c != EOF && c != (int)'\n') 641 while (getchar() != (int)'\n') 642 ; 643 if (c == (int)'n') 644 break; 645 } 646 (void) unlink(tmpfil); 647 return (1); 648 } 649 650 static int 651 editit(void) 652 { 653 int pid, xpid; 654 int locstat, omask; 655 const char *ed; 656 uid_t uid; 657 gid_t gid; 658 659 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 660 while ((pid = fork()) < 0) { 661 if (errno == EPROCLIM) { 662 warnx("you have too many processes"); 663 return(0); 664 } 665 if (errno != EAGAIN) { 666 warn("fork"); 667 return(0); 668 } 669 sleep(1); 670 } 671 if (pid == 0) { 672 sigsetmask(omask); 673 gid = getgid(); 674 if (setresgid(gid, gid, gid) == -1) 675 err(1, "setresgid"); 676 uid = getuid(); 677 if (setresuid(uid, uid, uid) == -1) 678 err(1, "setresuid"); 679 if ((ed = getenv("EDITOR")) == (char *)0) 680 ed = DEFEDITOR; 681 execlp(ed, ed, tmpfil, (char *)0); 682 err(1, "%s", ed); 683 } 684 while ((xpid = wait(&locstat)) >= 0) 685 if (xpid == pid) 686 break; 687 sigsetmask(omask); 688 return(!locstat); 689 } 690 691 static char * 692 skip(char *cp) 693 { 694 695 while (*cp != '\0' && isspace(*cp)) 696 cp++; 697 if (*cp == '\0' || *cp == '#') 698 return (NULL); 699 return (cp); 700 } 701 702 static char * 703 word(char *cp) 704 { 705 char c; 706 707 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 708 cp++; 709 if ((c = *cp) != '\0') { 710 *cp++ = '\0'; 711 if (c != '#') 712 return (skip(cp)); 713 } 714 return (NULL); 715 } 716 717 /* 718 * Read an ascii label in from fd f, 719 * in the same format as that put out by display(), 720 * and fill in lp. 721 */ 722 static int 723 getasciilabel(FILE *f, struct disklabel *lp) 724 { 725 char *cp, *endp; 726 const char **cpp; 727 u_int part; 728 char *tp, line[BUFSIZ]; 729 u_long v; 730 int lineno = 0, errors = 0; 731 int i; 732 733 makelabel("auto", lp); 734 bzero(&part_set, sizeof(part_set)); 735 bzero(&part_size_type, sizeof(part_size_type)); 736 bzero(&part_offset_type, sizeof(part_offset_type)); 737 lp->d_bbsize = BBSIZE; /* XXX */ 738 lp->d_sbsize = 0; /* XXX */ 739 while (fgets(line, sizeof(line) - 1, f)) { 740 lineno++; 741 if ((cp = strchr(line,'\n')) != NULL) 742 *cp = '\0'; 743 cp = skip(line); 744 if (cp == NULL) 745 continue; 746 tp = strchr(cp, ':'); 747 if (tp == NULL) { 748 fprintf(stderr, "line %d: syntax error\n", lineno); 749 errors++; 750 continue; 751 } 752 *tp++ = '\0', tp = skip(tp); 753 if (!strcmp(cp, "type")) { 754 if (tp == NULL) 755 tp = unknown; 756 cpp = dktypenames; 757 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 758 if (*cpp && !strcmp(*cpp, tp)) { 759 lp->d_type = cpp - dktypenames; 760 break; 761 } 762 if (cpp < &dktypenames[DKMAXTYPES]) 763 continue; 764 errno = 0; 765 v = strtoul(tp, &endp, 10); 766 if (errno != 0 || *endp != '\0') 767 v = DKMAXTYPES; 768 if (v >= DKMAXTYPES) 769 fprintf(stderr, "line %d:%s %lu\n", lineno, 770 "Warning, unknown disk type", v); 771 else 772 lp->d_type = v; 773 continue; 774 } 775 if (!strcmp(cp, "flags")) { 776 for (v = 0; (cp = tp) && *cp != '\0';) { 777 tp = word(cp); 778 if (!strcmp(cp, "removeable")) 779 v |= D_REMOVABLE; 780 else if (!strcmp(cp, "ecc")) 781 v |= D_ECC; 782 else if (!strcmp(cp, "badsect")) 783 v |= D_BADSECT; 784 else { 785 fprintf(stderr, 786 "line %d: %s: bad flag\n", 787 lineno, cp); 788 errors++; 789 } 790 } 791 lp->d_flags = v; 792 continue; 793 } 794 if (!strcmp(cp, "drivedata")) { 795 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 796 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 797 tp = word(cp); 798 } 799 continue; 800 } 801 if (sscanf(cp, "%lu partitions", &v) == 1) { 802 if (v > MAXPARTITIONS) { 803 fprintf(stderr, 804 "line %d: bad # of partitions\n", lineno); 805 lp->d_npartitions = MAXPARTITIONS; 806 errors++; 807 } else if (v < DEFPARTITIONS) { 808 fprintf(stderr, 809 "line %d: bad # of partitions\n", lineno); 810 lp->d_npartitions = DEFPARTITIONS; 811 errors++; 812 } else 813 lp->d_npartitions = v; 814 continue; 815 } 816 if (tp == NULL) 817 tp = blank; 818 if (!strcmp(cp, "disk")) { 819 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 820 continue; 821 } 822 if (!strcmp(cp, "label")) { 823 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 824 continue; 825 } 826 if (!strcmp(cp, "bytes/sector")) { 827 v = strtoul(tp, NULL, 10); 828 if (v == 0 || (v % DEV_BSIZE) != 0) { 829 fprintf(stderr, 830 "line %d: %s: bad sector size\n", 831 lineno, tp); 832 errors++; 833 } else 834 lp->d_secsize = v; 835 continue; 836 } 837 if (!strcmp(cp, "sectors/track")) { 838 v = strtoul(tp, NULL, 10); 839 #if (ULONG_MAX != 0xffffffffUL) 840 if (v == 0 || v > 0xffffffff) 841 #else 842 if (v == 0) 843 #endif 844 { 845 fprintf(stderr, "line %d: %s: bad %s\n", 846 lineno, tp, cp); 847 errors++; 848 } else 849 lp->d_nsectors = v; 850 continue; 851 } 852 if (!strcmp(cp, "sectors/cylinder")) { 853 v = strtoul(tp, NULL, 10); 854 if (v == 0) { 855 fprintf(stderr, "line %d: %s: bad %s\n", 856 lineno, tp, cp); 857 errors++; 858 } else 859 lp->d_secpercyl = v; 860 continue; 861 } 862 if (!strcmp(cp, "tracks/cylinder")) { 863 v = strtoul(tp, NULL, 10); 864 if (v == 0) { 865 fprintf(stderr, "line %d: %s: bad %s\n", 866 lineno, tp, cp); 867 errors++; 868 } else 869 lp->d_ntracks = v; 870 continue; 871 } 872 if (!strcmp(cp, "cylinders")) { 873 v = strtoul(tp, NULL, 10); 874 if (v == 0) { 875 fprintf(stderr, "line %d: %s: bad %s\n", 876 lineno, tp, cp); 877 errors++; 878 } else 879 lp->d_ncylinders = v; 880 continue; 881 } 882 if (!strcmp(cp, "sectors/unit")) { 883 v = strtoul(tp, NULL, 10); 884 if (v == 0) { 885 fprintf(stderr, "line %d: %s: bad %s\n", 886 lineno, tp, cp); 887 errors++; 888 } else 889 lp->d_secperunit = v; 890 continue; 891 } 892 if (!strcmp(cp, "rpm")) { 893 v = strtoul(tp, NULL, 10); 894 if (v == 0 || v > USHRT_MAX) { 895 fprintf(stderr, "line %d: %s: bad %s\n", 896 lineno, tp, cp); 897 errors++; 898 } else 899 lp->d_rpm = v; 900 continue; 901 } 902 if (!strcmp(cp, "interleave")) { 903 v = strtoul(tp, NULL, 10); 904 if (v == 0 || v > USHRT_MAX) { 905 fprintf(stderr, "line %d: %s: bad %s\n", 906 lineno, tp, cp); 907 errors++; 908 } else 909 lp->d_interleave = v; 910 continue; 911 } 912 if (!strcmp(cp, "trackskew")) { 913 v = strtoul(tp, NULL, 10); 914 if (v > USHRT_MAX) { 915 fprintf(stderr, "line %d: %s: bad %s\n", 916 lineno, tp, cp); 917 errors++; 918 } else 919 lp->d_trackskew = v; 920 continue; 921 } 922 if (!strcmp(cp, "cylinderskew")) { 923 v = strtoul(tp, NULL, 10); 924 if (v > USHRT_MAX) { 925 fprintf(stderr, "line %d: %s: bad %s\n", 926 lineno, tp, cp); 927 errors++; 928 } else 929 lp->d_cylskew = v; 930 continue; 931 } 932 if (!strcmp(cp, "headswitch")) { 933 v = strtoul(tp, NULL, 10); 934 lp->d_headswitch = v; 935 continue; 936 } 937 if (!strcmp(cp, "track-to-track seek")) { 938 v = strtoul(tp, NULL, 10); 939 lp->d_trkseek = v; 940 continue; 941 } 942 /* the ':' was removed above */ 943 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 944 fprintf(stderr, 945 "line %d: %s: Unknown disklabel field\n", lineno, 946 cp); 947 errors++; 948 continue; 949 } 950 951 /* Process a partition specification line. */ 952 part = *cp - 'a'; 953 if (part >= lp->d_npartitions) { 954 fprintf(stderr, 955 "line %d: partition name out of range a-%c: %s\n", 956 lineno, 'a' + lp->d_npartitions - 1, cp); 957 errors++; 958 continue; 959 } 960 part_set[part] = 1; 961 962 if (getasciipartspec(tp, lp, part, lineno) != 0) { 963 errors++; 964 break; 965 } 966 } 967 errors += checklabel(lp); 968 return (errors == 0); 969 } 970 971 #define NXTNUM(n) do { \ 972 if (tp == NULL) { \ 973 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 974 return (1); \ 975 } else { \ 976 cp = tp, tp = word(cp); \ 977 (n) = strtoul(cp, NULL, 10); \ 978 } \ 979 } while (0) 980 981 /* retain 1 character following number */ 982 #define NXTWORD(w,n) do { \ 983 if (tp == NULL) { \ 984 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 985 return (1); \ 986 } else { \ 987 char *tmp; \ 988 cp = tp, tp = word(cp); \ 989 (n) = strtoul(cp, &tmp, 10); \ 990 if (tmp) (w) = *tmp; \ 991 } \ 992 } while (0) 993 994 /* 995 * Read a partition line into partition `part' in the specified disklabel. 996 * Return 0 on success, 1 on failure. 997 */ 998 static int 999 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1000 { 1001 struct partition *pp; 1002 char *cp, *endp; 1003 const char **cpp; 1004 u_long v; 1005 1006 pp = &lp->d_partitions[part]; 1007 cp = NULL; 1008 1009 v = 0; 1010 NXTWORD(part_size_type[part],v); 1011 if (v == 0 && part_size_type[part] != '*') { 1012 fprintf(stderr, 1013 "line %d: %s: bad partition size\n", lineno, cp); 1014 return (1); 1015 } 1016 pp->p_size = v; 1017 1018 v = 0; 1019 NXTWORD(part_offset_type[part],v); 1020 if (v == 0 && part_offset_type[part] != '*' && 1021 part_offset_type[part] != '\0') { 1022 fprintf(stderr, 1023 "line %d: %s: bad partition offset\n", lineno, cp); 1024 return (1); 1025 } 1026 pp->p_offset = v; 1027 if (tp == NULL) { 1028 fprintf(stderr, "line %d: missing file system type\n", lineno); 1029 return (1); 1030 } 1031 cp = tp, tp = word(cp); 1032 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1033 if (*cpp && !strcmp(*cpp, cp)) 1034 break; 1035 if (*cpp != NULL) { 1036 pp->p_fstype = cpp - fstypenames; 1037 } else { 1038 if (isdigit(*cp)) { 1039 errno = 0; 1040 v = strtoul(cp, &endp, 10); 1041 if (errno != 0 || *endp != '\0') 1042 v = FSMAXTYPES; 1043 } else 1044 v = FSMAXTYPES; 1045 if (v >= FSMAXTYPES) { 1046 fprintf(stderr, 1047 "line %d: Warning, unknown file system type %s\n", 1048 lineno, cp); 1049 v = FS_UNUSED; 1050 } 1051 pp->p_fstype = v; 1052 } 1053 1054 switch (pp->p_fstype) { 1055 case FS_UNUSED: 1056 case FS_BSDFFS: 1057 case FS_BSDLFS: 1058 /* accept defaults for fsize/frag/cpg */ 1059 if (tp) { 1060 NXTNUM(pp->p_fsize); 1061 if (pp->p_fsize == 0) 1062 break; 1063 NXTNUM(v); 1064 pp->p_frag = v / pp->p_fsize; 1065 if (tp != NULL) 1066 NXTNUM(pp->p_cpg); 1067 } 1068 /* else default to 0's */ 1069 break; 1070 default: 1071 break; 1072 } 1073 return (0); 1074 } 1075 1076 /* 1077 * Check disklabel for errors and fill in 1078 * derived fields according to supplied values. 1079 */ 1080 static int 1081 checklabel(struct disklabel *lp) 1082 { 1083 struct partition *pp; 1084 int i, errors = 0; 1085 char part; 1086 u_long base_offset, needed, total_percent, current_offset; 1087 long free_space; 1088 int seen_default_offset; 1089 int hog_part; 1090 int j; 1091 struct partition *pp2; 1092 1093 if (lp == NULL) 1094 lp = &lab; 1095 1096 if (allfields) { 1097 1098 if (lp->d_secsize == 0) { 1099 fprintf(stderr, "sector size 0\n"); 1100 return (1); 1101 } 1102 if (lp->d_nsectors == 0) { 1103 fprintf(stderr, "sectors/track 0\n"); 1104 return (1); 1105 } 1106 if (lp->d_ntracks == 0) { 1107 fprintf(stderr, "tracks/cylinder 0\n"); 1108 return (1); 1109 } 1110 if (lp->d_ncylinders == 0) { 1111 fprintf(stderr, "cylinders/unit 0\n"); 1112 errors++; 1113 } 1114 if (lp->d_rpm == 0) 1115 warnx("revolutions/minute 0"); 1116 if (lp->d_secpercyl == 0) 1117 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1118 if (lp->d_secperunit == 0) 1119 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1120 if (lp->d_bbsize == 0) { 1121 fprintf(stderr, "boot block size 0\n"); 1122 errors++; 1123 } else if (lp->d_bbsize % lp->d_secsize) 1124 warnx("boot block size %% sector-size != 0"); 1125 if (lp->d_npartitions > MAXPARTITIONS) { 1126 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1127 (u_long)lp->d_npartitions, MAXPARTITIONS); 1128 errors++; 1129 } 1130 if (lp->d_npartitions < DEFPARTITIONS) { 1131 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)", 1132 (u_long)lp->d_npartitions, DEFPARTITIONS); 1133 errors++; 1134 } 1135 } else { 1136 struct disklabel *vl; 1137 1138 vl = getvirginlabel(); 1139 if (lp->d_secsize == 0) 1140 lp->d_secsize = vl->d_secsize; 1141 if (lp->d_nsectors == 0) 1142 lp->d_nsectors = vl->d_nsectors; 1143 if (lp->d_ntracks == 0) 1144 lp->d_ntracks = vl->d_ntracks; 1145 if (lp->d_ncylinders == 0) 1146 lp->d_ncylinders = vl->d_ncylinders; 1147 if (lp->d_rpm == 0) 1148 lp->d_rpm = vl->d_rpm; 1149 if (lp->d_interleave == 0) 1150 lp->d_interleave = vl->d_interleave; 1151 if (lp->d_secpercyl == 0) 1152 lp->d_secpercyl = vl->d_secpercyl; 1153 if (lp->d_secperunit == 0 || 1154 lp->d_secperunit > vl->d_secperunit) 1155 lp->d_secperunit = vl->d_secperunit; 1156 if (lp->d_bbsize == 0) 1157 lp->d_bbsize = vl->d_bbsize; 1158 if (lp->d_npartitions < DEFPARTITIONS || 1159 lp->d_npartitions > MAXPARTITIONS) 1160 lp->d_npartitions = vl->d_npartitions; 1161 } 1162 1163 1164 /* first allocate space to the partitions, then offsets */ 1165 total_percent = 0; /* in percent */ 1166 hog_part = -1; 1167 /* find all fixed partitions */ 1168 for (i = 0; i < lp->d_npartitions; i++) { 1169 pp = &lp->d_partitions[i]; 1170 if (part_set[i]) { 1171 if (part_size_type[i] == '*') { 1172 if (i == RAW_PART) { 1173 pp->p_size = lp->d_secperunit; 1174 } else { 1175 if (hog_part != -1) 1176 warnx("Too many '*' partitions (%c and %c)", 1177 hog_part + 'a',i + 'a'); 1178 else 1179 hog_part = i; 1180 } 1181 } else { 1182 off_t size; 1183 1184 size = pp->p_size; 1185 switch (part_size_type[i]) { 1186 case '%': 1187 total_percent += size; 1188 break; 1189 case 't': 1190 case 'T': 1191 size *= 1024ULL; 1192 /* FALLTHROUGH */ 1193 case 'g': 1194 case 'G': 1195 size *= 1024ULL; 1196 /* FALLTHROUGH */ 1197 case 'm': 1198 case 'M': 1199 size *= 1024ULL; 1200 /* FALLTHROUGH */ 1201 case 'k': 1202 case 'K': 1203 size *= 1024ULL; 1204 break; 1205 case '\0': 1206 break; 1207 default: 1208 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1209 part_size_type[i], i + 'a'); 1210 break; 1211 } 1212 /* don't count %'s yet */ 1213 if (part_size_type[i] != '%') { 1214 /* 1215 * for all not in sectors, convert to 1216 * sectors 1217 */ 1218 if (part_size_type[i] != '\0') { 1219 if (size % lp->d_secsize != 0) 1220 warnx("partition %c not an integer number of sectors", 1221 i + 'a'); 1222 size /= lp->d_secsize; 1223 pp->p_size = size; 1224 } 1225 } 1226 } 1227 } 1228 } 1229 1230 /* Find out the total free space, excluding the boot block area. */ 1231 base_offset = BBSIZE / secsize; 1232 free_space = 0; 1233 for (i = 0; i < lp->d_npartitions; i++) { 1234 pp = &lp->d_partitions[i]; 1235 if (!part_set[i] || i == RAW_PART || 1236 part_size_type[i] == '%' || part_size_type[i] == '*') 1237 continue; 1238 if (pp->p_offset > base_offset) 1239 free_space += pp->p_offset - base_offset; 1240 if (pp->p_offset + pp->p_size > base_offset) 1241 base_offset = pp->p_offset + pp->p_size; 1242 } 1243 if (base_offset < lp->d_secperunit) 1244 free_space += lp->d_secperunit - base_offset; 1245 1246 /* handle % partitions - note %'s don't need to add up to 100! */ 1247 if (total_percent != 0) { 1248 if (total_percent > 100) { 1249 fprintf(stderr,"total percentage %lu is greater than 100\n", 1250 total_percent); 1251 errors++; 1252 } 1253 1254 if (free_space > 0) { 1255 for (i = 0; i < lp->d_npartitions; i++) { 1256 pp = &lp->d_partitions[i]; 1257 if (part_set[i] && part_size_type[i] == '%') { 1258 /* careful of overflows! and integer roundoff */ 1259 pp->p_size = ((double)pp->p_size/100) * free_space; 1260 1261 /* FIX we can lose a sector or so due to roundoff per 1262 partition. A more complex algorithm could avoid that */ 1263 } 1264 } 1265 } else { 1266 fprintf(stderr, 1267 "%ld sectors available to give to '*' and '%%' partitions\n", 1268 free_space); 1269 errors++; 1270 /* fix? set all % partitions to size 0? */ 1271 } 1272 } 1273 /* give anything remaining to the hog partition */ 1274 if (hog_part != -1) { 1275 /* 1276 * Find the range of offsets usable by '*' partitions around 1277 * the hog partition and how much space they need. 1278 */ 1279 needed = 0; 1280 base_offset = BBSIZE / secsize; 1281 for (i = hog_part - 1; i >= 0; i--) { 1282 pp = &lp->d_partitions[i]; 1283 if (!part_set[i] || i == RAW_PART) 1284 continue; 1285 if (part_offset_type[i] == '*') { 1286 needed += pp->p_size; 1287 continue; 1288 } 1289 base_offset = pp->p_offset + pp->p_size; 1290 break; 1291 } 1292 current_offset = lp->d_secperunit; 1293 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1294 pp = &lp->d_partitions[i]; 1295 if (!part_set[i] || i == RAW_PART) 1296 continue; 1297 if (part_offset_type[i] == '*') { 1298 needed += pp->p_size; 1299 continue; 1300 } 1301 current_offset = pp->p_offset; 1302 } 1303 1304 if (current_offset - base_offset <= needed) { 1305 fprintf(stderr, "Cannot find space for partition %c\n", 1306 hog_part + 'a'); 1307 fprintf(stderr, 1308 "Need more than %lu sectors between %lu and %lu\n", 1309 needed, base_offset, current_offset); 1310 errors++; 1311 lp->d_partitions[hog_part].p_size = 0; 1312 } else { 1313 lp->d_partitions[hog_part].p_size = current_offset - 1314 base_offset - needed; 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 enlightened days uses the CHS geometry for 1467 * anything, but nonetheless 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