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 geom_bsd_available(void); 84 static int writelabel(void); 85 static int readlabel(int flag); 86 static void display(FILE *, const struct disklabel *); 87 static int edit(void); 88 static int editit(void); 89 static void fixlabel(struct disklabel *); 90 static char *skip(char *); 91 static char *word(char *); 92 static int getasciilabel(FILE *, struct disklabel *); 93 static int getasciipartspec(char *, struct disklabel *, int, int); 94 static int checklabel(struct disklabel *); 95 static void usage(void); 96 static struct disklabel *getvirginlabel(void); 97 98 #define DEFEDITOR _PATH_VI 99 #define DEFPARTITIONS 8 100 101 static char *specname; 102 static char *pname; 103 static char tmpfil[] = PATH_TMPFILE; 104 105 static struct disklabel lab; 106 static u_char bootarea[BBSIZE]; 107 static off_t mediasize; 108 static ssize_t secsize; 109 static char blank[] = ""; 110 static char unknown[] = "unknown"; 111 112 #define MAX_PART ('z') 113 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 114 static char part_size_type[MAX_NUM_PARTS]; 115 static char part_offset_type[MAX_NUM_PARTS]; 116 static int part_set[MAX_NUM_PARTS]; 117 118 static int installboot; /* non-zero if we should install a boot program */ 119 static int allfields; /* present all fields in edit */ 120 static char const *xxboot; /* primary boot */ 121 122 static uint32_t lba_offset; 123 #ifndef LABELSECTOR 124 #define LABELSECTOR -1 125 #endif 126 #ifndef LABELOFFSET 127 #define LABELOFFSET -1 128 #endif 129 static int labelsoffset = LABELSECTOR; 130 static int labeloffset = LABELOFFSET; 131 static int bbsize = BBSIZE; 132 133 enum { 134 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 135 } op = UNSPEC; 136 137 138 static int disable_write; /* set to disable writing to disk label */ 139 static int is_file; /* work on a file (abs. pathname), "-f" opt. */ 140 141 int 142 main(int argc, char *argv[]) 143 { 144 FILE *t; 145 int ch, error, fd; 146 const char *name; 147 148 error = 0; 149 name = NULL; 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 } else { 174 errx(1, "Unsupported architecture"); 175 } 176 break; 177 case 'n': 178 disable_write = 1; 179 break; 180 case 'R': 181 if (op != UNSPEC) 182 usage(); 183 op = RESTORE; 184 break; 185 case 'e': 186 if (op != UNSPEC) 187 usage(); 188 op = EDIT; 189 break; 190 case 'r': 191 /* 192 * We accept and ignode -r for compatibility with 193 * historically disklabel usage. 194 */ 195 break; 196 case 'w': 197 if (op != UNSPEC) 198 usage(); 199 op = WRITE; 200 break; 201 case '?': 202 default: 203 usage(); 204 } 205 argc -= optind; 206 argv += optind; 207 208 if (argc < 1) 209 usage(); 210 if (labelsoffset < 0 || labeloffset < 0) 211 errx(1, "a -m <architecture> option must be specified"); 212 213 /* Figure out the names of the thing we're working on */ 214 if (is_file) { 215 specname = argv[0]; 216 } else { 217 specname = g_device_path(argv[0]); 218 if (specname == NULL) { 219 warn("unable to get correct path for %s", argv[0]); 220 return(1); 221 } 222 fd = open(specname, O_RDONLY); 223 if (fd < 0) { 224 warn("error opening %s", specname); 225 return(1); 226 } 227 pname = g_providername(fd); 228 if (pname == NULL) { 229 warn("error getting providername for %s", specname); 230 close(fd); 231 return(1); 232 } 233 close(fd); 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; 340 struct stat st; 341 342 if (xxboot == NULL) 343 xxboot = "/boot/boot"; 344 fd = open(xxboot, O_RDONLY); 345 if (fd < 0) 346 err(1, "cannot open %s", xxboot); 347 fstat(fd, &st); 348 if (st.st_size <= BBSIZE) { 349 if (read(fd, bootarea, st.st_size) != st.st_size) 350 err(1, "read error %s", xxboot); 351 close(fd); 352 return; 353 } 354 errx(1, "boot code %s is wrong size", xxboot); 355 } 356 357 static int 358 geom_bsd_available(void) 359 { 360 struct gclass *class; 361 struct gmesh mesh; 362 int error; 363 364 error = geom_gettree(&mesh); 365 if (error != 0) 366 errc(1, error, "Cannot get GEOM tree"); 367 368 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 369 if (strcmp(class->lg_name, "BSD") == 0) { 370 geom_deletetree(&mesh); 371 return (1); 372 } 373 } 374 375 geom_deletetree(&mesh); 376 377 return (0); 378 } 379 380 static int 381 writelabel(void) 382 { 383 int i, fd, serrno; 384 struct gctl_req *grq; 385 char const *errstr; 386 struct disklabel *lp = &lab; 387 388 if (disable_write) { 389 warnx("write to disk label supressed - label was as follows:"); 390 display(stdout, NULL); 391 return (0); 392 } 393 394 lp->d_magic = DISKMAGIC; 395 lp->d_magic2 = DISKMAGIC; 396 lp->d_checksum = 0; 397 lp->d_checksum = dkcksum(lp); 398 if (installboot) 399 readboot(); 400 for (i = 0; i < lab.d_npartitions; i++) 401 if (lab.d_partitions[i].p_size) 402 lab.d_partitions[i].p_offset += lba_offset; 403 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 404 lp); 405 406 fd = open(specname, O_RDWR); 407 if (fd < 0) { 408 if (is_file) { 409 warn("cannot open file %s for writing label", specname); 410 return(1); 411 } else 412 serrno = errno; 413 414 /* Give up if GEOM_BSD is not available. */ 415 if (geom_bsd_available() == 0) { 416 warnc(serrno, "%s", specname); 417 return (1); 418 } 419 420 grq = gctl_get_handle(); 421 gctl_ro_param(grq, "verb", -1, "write label"); 422 gctl_ro_param(grq, "class", -1, "BSD"); 423 gctl_ro_param(grq, "geom", -1, pname); 424 gctl_ro_param(grq, "label", 148+16*8, 425 bootarea + labeloffset + labelsoffset * secsize); 426 errstr = gctl_issue(grq); 427 if (errstr != NULL) { 428 warnx("%s", errstr); 429 gctl_free(grq); 430 return(1); 431 } 432 gctl_free(grq); 433 if (installboot) { 434 grq = gctl_get_handle(); 435 gctl_ro_param(grq, "verb", -1, "write bootcode"); 436 gctl_ro_param(grq, "class", -1, "BSD"); 437 gctl_ro_param(grq, "geom", -1, pname); 438 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 439 errstr = gctl_issue(grq); 440 if (errstr != NULL) { 441 warnx("%s", errstr); 442 gctl_free(grq); 443 return (1); 444 } 445 gctl_free(grq); 446 } 447 } else { 448 if (write(fd, bootarea, bbsize) != bbsize) { 449 warn("write %s", specname); 450 close (fd); 451 return (1); 452 } 453 close (fd); 454 } 455 return (0); 456 } 457 458 static void 459 get_file_parms(int f) 460 { 461 int i; 462 struct stat sb; 463 464 if (fstat(f, &sb) != 0) 465 err(4, "fstat failed"); 466 i = sb.st_mode & S_IFMT; 467 if (i != S_IFREG && i != S_IFLNK) 468 errx(4, "%s is not a valid file or link", specname); 469 secsize = DEV_BSIZE; 470 mediasize = sb.st_size; 471 } 472 473 /* 474 * Fetch disklabel for disk. 475 */ 476 static int 477 readlabel(int flag) 478 { 479 ssize_t nbytes; 480 uint32_t lba; 481 int f, i; 482 int error; 483 484 f = open(specname, O_RDONLY); 485 if (f < 0) 486 err(1, "%s", specname); 487 if (is_file) 488 get_file_parms(f); 489 else { 490 mediasize = g_mediasize(f); 491 secsize = g_sectorsize(f); 492 if (secsize < 0 || mediasize < 0) 493 err(4, "cannot get disk geometry"); 494 } 495 if (mediasize > (off_t)0xffffffff * secsize) 496 errx(1, 497 "disks with more than 2^32-1 sectors are not supported"); 498 (void)lseek(f, (off_t)0, SEEK_SET); 499 nbytes = read(f, bootarea, BBSIZE); 500 if (nbytes == -1) 501 err(4, "%s read", specname); 502 if (nbytes != BBSIZE) 503 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 504 close (f); 505 error = bsd_disklabel_le_dec( 506 bootarea + (labeloffset + labelsoffset * secsize), 507 &lab, MAXPARTITIONS); 508 if (flag && error) 509 errx(1, "%s: no valid label found", specname); 510 511 if (is_file) 512 return(0); 513 514 /* 515 * Compensate for absolute block addressing by finding the 516 * smallest partition offset and if the offset of the 'c' 517 * partition is equal to that, subtract it from all offsets. 518 */ 519 lba = ~0; 520 for (i = 0; i < lab.d_npartitions; i++) { 521 if (lab.d_partitions[i].p_size) 522 lba = MIN(lba, lab.d_partitions[i].p_offset); 523 } 524 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 525 for (i = 0; i < lab.d_npartitions; i++) { 526 if (lab.d_partitions[i].p_size) 527 lab.d_partitions[i].p_offset -= lba; 528 } 529 /* 530 * Save the offset so that we can write the label 531 * back with absolute block addresses. 532 */ 533 lba_offset = lba; 534 } 535 return (error); 536 } 537 538 539 static void 540 display(FILE *f, const struct disklabel *lp) 541 { 542 int i, j; 543 const struct partition *pp; 544 545 if (lp == NULL) 546 lp = &lab; 547 548 fprintf(f, "# %s:\n", specname); 549 if (allfields) { 550 if (lp->d_type < DKMAXTYPES) 551 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 552 else 553 fprintf(f, "type: %u\n", lp->d_type); 554 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 555 lp->d_typename); 556 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 557 lp->d_packname); 558 fprintf(f, "flags:"); 559 if (lp->d_flags & D_REMOVABLE) 560 fprintf(f, " removeable"); 561 if (lp->d_flags & D_ECC) 562 fprintf(f, " ecc"); 563 if (lp->d_flags & D_BADSECT) 564 fprintf(f, " badsect"); 565 fprintf(f, "\n"); 566 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 567 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 568 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 569 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 570 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 571 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 572 fprintf(f, "rpm: %u\n", lp->d_rpm); 573 fprintf(f, "interleave: %u\n", lp->d_interleave); 574 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 575 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 576 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 577 (u_long)lp->d_headswitch); 578 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 579 (u_long)lp->d_trkseek); 580 fprintf(f, "drivedata: "); 581 for (i = NDDATA - 1; i >= 0; i--) 582 if (lp->d_drivedata[i]) 583 break; 584 if (i < 0) 585 i = 0; 586 for (j = 0; j <= i; j++) 587 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 588 fprintf(f, "\n\n"); 589 } 590 fprintf(f, "%u partitions:\n", lp->d_npartitions); 591 fprintf(f, 592 "# size offset fstype [fsize bsize bps/cpg]\n"); 593 pp = lp->d_partitions; 594 for (i = 0; i < lp->d_npartitions; i++, pp++) { 595 if (pp->p_size) { 596 fprintf(f, " %c: %10lu %10lu ", 'a' + i, 597 (u_long)pp->p_size, (u_long)pp->p_offset); 598 if (pp->p_fstype < FSMAXTYPES) 599 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 600 else 601 fprintf(f, "%8d", pp->p_fstype); 602 switch (pp->p_fstype) { 603 604 case FS_UNUSED: /* XXX */ 605 fprintf(f, " %5lu %5lu %2s", 606 (u_long)pp->p_fsize, 607 (u_long)(pp->p_fsize * pp->p_frag), ""); 608 break; 609 610 case FS_BSDFFS: 611 fprintf(f, " %5lu %5lu %5u", 612 (u_long)pp->p_fsize, 613 (u_long)(pp->p_fsize * pp->p_frag), 614 pp->p_cpg); 615 break; 616 617 case FS_BSDLFS: 618 fprintf(f, " %5lu %5lu %5d", 619 (u_long)pp->p_fsize, 620 (u_long)(pp->p_fsize * pp->p_frag), 621 pp->p_cpg); 622 break; 623 624 default: 625 fprintf(f, "%20.20s", ""); 626 break; 627 } 628 if (i == RAW_PART) { 629 fprintf(f, " # \"raw\" part, don't edit"); 630 } 631 fprintf(f, "\n"); 632 } 633 } 634 fflush(f); 635 } 636 637 static int 638 edit(void) 639 { 640 int c, fd; 641 struct disklabel label; 642 FILE *fp; 643 644 if ((fd = mkstemp(tmpfil)) == -1 || 645 (fp = fdopen(fd, "w")) == NULL) { 646 warnx("can't create %s", tmpfil); 647 return (1); 648 } 649 display(fp, NULL); 650 fclose(fp); 651 for (;;) { 652 if (!editit()) 653 break; 654 fp = fopen(tmpfil, "r"); 655 if (fp == NULL) { 656 warnx("can't reopen %s for reading", tmpfil); 657 break; 658 } 659 bzero((char *)&label, sizeof(label)); 660 c = getasciilabel(fp, &label); 661 fclose(fp); 662 if (c) { 663 lab = label; 664 if (writelabel() == 0) { 665 (void) unlink(tmpfil); 666 return (0); 667 } 668 } 669 printf("re-edit the label? [y]: "); 670 fflush(stdout); 671 c = getchar(); 672 if (c != EOF && c != (int)'\n') 673 while (getchar() != (int)'\n') 674 ; 675 if (c == (int)'n') 676 break; 677 } 678 (void) unlink(tmpfil); 679 return (1); 680 } 681 682 static int 683 editit(void) 684 { 685 int pid, xpid; 686 int locstat, omask; 687 const char *ed; 688 uid_t uid; 689 gid_t gid; 690 691 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 692 while ((pid = fork()) < 0) { 693 if (errno == EPROCLIM) { 694 warnx("you have too many processes"); 695 return(0); 696 } 697 if (errno != EAGAIN) { 698 warn("fork"); 699 return(0); 700 } 701 sleep(1); 702 } 703 if (pid == 0) { 704 sigsetmask(omask); 705 gid = getgid(); 706 if (setresgid(gid, gid, gid) == -1) 707 err(1, "setresgid"); 708 uid = getuid(); 709 if (setresuid(uid, uid, uid) == -1) 710 err(1, "setresuid"); 711 if ((ed = getenv("EDITOR")) == (char *)0) 712 ed = DEFEDITOR; 713 execlp(ed, ed, tmpfil, (char *)0); 714 err(1, "%s", ed); 715 } 716 while ((xpid = wait(&locstat)) >= 0) 717 if (xpid == pid) 718 break; 719 sigsetmask(omask); 720 return(!locstat); 721 } 722 723 static char * 724 skip(char *cp) 725 { 726 727 while (*cp != '\0' && isspace(*cp)) 728 cp++; 729 if (*cp == '\0' || *cp == '#') 730 return (NULL); 731 return (cp); 732 } 733 734 static char * 735 word(char *cp) 736 { 737 char c; 738 739 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 740 cp++; 741 if ((c = *cp) != '\0') { 742 *cp++ = '\0'; 743 if (c != '#') 744 return (skip(cp)); 745 } 746 return (NULL); 747 } 748 749 /* 750 * Read an ascii label in from fd f, 751 * in the same format as that put out by display(), 752 * and fill in lp. 753 */ 754 static int 755 getasciilabel(FILE *f, struct disklabel *lp) 756 { 757 char *cp, *endp; 758 const char **cpp; 759 u_int part; 760 char *tp, line[BUFSIZ]; 761 u_long v; 762 int lineno = 0, errors = 0; 763 int i; 764 765 makelabel("auto", lp); 766 bzero(&part_set, sizeof(part_set)); 767 bzero(&part_size_type, sizeof(part_size_type)); 768 bzero(&part_offset_type, sizeof(part_offset_type)); 769 lp->d_bbsize = BBSIZE; /* XXX */ 770 lp->d_sbsize = 0; /* XXX */ 771 while (fgets(line, sizeof(line) - 1, f)) { 772 lineno++; 773 if ((cp = index(line,'\n')) != 0) 774 *cp = '\0'; 775 cp = skip(line); 776 if (cp == NULL) 777 continue; 778 tp = index(cp, ':'); 779 if (tp == NULL) { 780 fprintf(stderr, "line %d: syntax error\n", lineno); 781 errors++; 782 continue; 783 } 784 *tp++ = '\0', tp = skip(tp); 785 if (!strcmp(cp, "type")) { 786 if (tp == NULL) 787 tp = unknown; 788 cpp = dktypenames; 789 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 790 if (*cpp && !strcmp(*cpp, tp)) { 791 lp->d_type = cpp - dktypenames; 792 break; 793 } 794 if (cpp < &dktypenames[DKMAXTYPES]) 795 continue; 796 errno = 0; 797 v = strtoul(tp, &endp, 10); 798 if (errno != 0 || *endp != '\0') 799 v = DKMAXTYPES; 800 if (v >= DKMAXTYPES) 801 fprintf(stderr, "line %d:%s %lu\n", lineno, 802 "Warning, unknown disk type", v); 803 else 804 lp->d_type = v; 805 continue; 806 } 807 if (!strcmp(cp, "flags")) { 808 for (v = 0; (cp = tp) && *cp != '\0';) { 809 tp = word(cp); 810 if (!strcmp(cp, "removeable")) 811 v |= D_REMOVABLE; 812 else if (!strcmp(cp, "ecc")) 813 v |= D_ECC; 814 else if (!strcmp(cp, "badsect")) 815 v |= D_BADSECT; 816 else { 817 fprintf(stderr, 818 "line %d: %s: bad flag\n", 819 lineno, cp); 820 errors++; 821 } 822 } 823 lp->d_flags = v; 824 continue; 825 } 826 if (!strcmp(cp, "drivedata")) { 827 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 828 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 829 tp = word(cp); 830 } 831 continue; 832 } 833 if (sscanf(cp, "%lu partitions", &v) == 1) { 834 if (v == 0 || v > MAXPARTITIONS) { 835 fprintf(stderr, 836 "line %d: bad # of partitions\n", lineno); 837 lp->d_npartitions = MAXPARTITIONS; 838 errors++; 839 } else 840 lp->d_npartitions = v; 841 continue; 842 } 843 if (tp == NULL) 844 tp = blank; 845 if (!strcmp(cp, "disk")) { 846 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 847 continue; 848 } 849 if (!strcmp(cp, "label")) { 850 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 851 continue; 852 } 853 if (!strcmp(cp, "bytes/sector")) { 854 v = strtoul(tp, NULL, 10); 855 if (v == 0 || (v % DEV_BSIZE) != 0) { 856 fprintf(stderr, 857 "line %d: %s: bad sector size\n", 858 lineno, tp); 859 errors++; 860 } else 861 lp->d_secsize = v; 862 continue; 863 } 864 if (!strcmp(cp, "sectors/track")) { 865 v = strtoul(tp, NULL, 10); 866 #if (ULONG_MAX != 0xffffffffUL) 867 if (v == 0 || v > 0xffffffff) 868 #else 869 if (v == 0) 870 #endif 871 { 872 fprintf(stderr, "line %d: %s: bad %s\n", 873 lineno, tp, cp); 874 errors++; 875 } else 876 lp->d_nsectors = v; 877 continue; 878 } 879 if (!strcmp(cp, "sectors/cylinder")) { 880 v = strtoul(tp, NULL, 10); 881 if (v == 0) { 882 fprintf(stderr, "line %d: %s: bad %s\n", 883 lineno, tp, cp); 884 errors++; 885 } else 886 lp->d_secpercyl = v; 887 continue; 888 } 889 if (!strcmp(cp, "tracks/cylinder")) { 890 v = strtoul(tp, NULL, 10); 891 if (v == 0) { 892 fprintf(stderr, "line %d: %s: bad %s\n", 893 lineno, tp, cp); 894 errors++; 895 } else 896 lp->d_ntracks = v; 897 continue; 898 } 899 if (!strcmp(cp, "cylinders")) { 900 v = strtoul(tp, NULL, 10); 901 if (v == 0) { 902 fprintf(stderr, "line %d: %s: bad %s\n", 903 lineno, tp, cp); 904 errors++; 905 } else 906 lp->d_ncylinders = v; 907 continue; 908 } 909 if (!strcmp(cp, "sectors/unit")) { 910 v = strtoul(tp, NULL, 10); 911 if (v == 0) { 912 fprintf(stderr, "line %d: %s: bad %s\n", 913 lineno, tp, cp); 914 errors++; 915 } else 916 lp->d_secperunit = v; 917 continue; 918 } 919 if (!strcmp(cp, "rpm")) { 920 v = strtoul(tp, NULL, 10); 921 if (v == 0 || v > USHRT_MAX) { 922 fprintf(stderr, "line %d: %s: bad %s\n", 923 lineno, tp, cp); 924 errors++; 925 } else 926 lp->d_rpm = v; 927 continue; 928 } 929 if (!strcmp(cp, "interleave")) { 930 v = strtoul(tp, NULL, 10); 931 if (v == 0 || v > USHRT_MAX) { 932 fprintf(stderr, "line %d: %s: bad %s\n", 933 lineno, tp, cp); 934 errors++; 935 } else 936 lp->d_interleave = v; 937 continue; 938 } 939 if (!strcmp(cp, "trackskew")) { 940 v = strtoul(tp, NULL, 10); 941 if (v > USHRT_MAX) { 942 fprintf(stderr, "line %d: %s: bad %s\n", 943 lineno, tp, cp); 944 errors++; 945 } else 946 lp->d_trackskew = v; 947 continue; 948 } 949 if (!strcmp(cp, "cylinderskew")) { 950 v = strtoul(tp, NULL, 10); 951 if (v > USHRT_MAX) { 952 fprintf(stderr, "line %d: %s: bad %s\n", 953 lineno, tp, cp); 954 errors++; 955 } else 956 lp->d_cylskew = v; 957 continue; 958 } 959 if (!strcmp(cp, "headswitch")) { 960 v = strtoul(tp, NULL, 10); 961 lp->d_headswitch = v; 962 continue; 963 } 964 if (!strcmp(cp, "track-to-track seek")) { 965 v = strtoul(tp, NULL, 10); 966 lp->d_trkseek = v; 967 continue; 968 } 969 /* the ':' was removed above */ 970 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 971 fprintf(stderr, 972 "line %d: %s: Unknown disklabel field\n", lineno, 973 cp); 974 errors++; 975 continue; 976 } 977 978 /* Process a partition specification line. */ 979 part = *cp - 'a'; 980 if (part >= lp->d_npartitions) { 981 fprintf(stderr, 982 "line %d: partition name out of range a-%c: %s\n", 983 lineno, 'a' + lp->d_npartitions - 1, cp); 984 errors++; 985 continue; 986 } 987 part_set[part] = 1; 988 989 if (getasciipartspec(tp, lp, part, lineno) != 0) { 990 errors++; 991 break; 992 } 993 } 994 errors += checklabel(lp); 995 return (errors == 0); 996 } 997 998 #define NXTNUM(n) do { \ 999 if (tp == NULL) { \ 1000 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1001 return (1); \ 1002 } else { \ 1003 cp = tp, tp = word(cp); \ 1004 (n) = strtoul(cp, NULL, 10); \ 1005 } \ 1006 } while (0) 1007 1008 /* retain 1 character following number */ 1009 #define NXTWORD(w,n) do { \ 1010 if (tp == NULL) { \ 1011 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1012 return (1); \ 1013 } else { \ 1014 char *tmp; \ 1015 cp = tp, tp = word(cp); \ 1016 (n) = strtoul(cp, &tmp, 10); \ 1017 if (tmp) (w) = *tmp; \ 1018 } \ 1019 } while (0) 1020 1021 /* 1022 * Read a partition line into partition `part' in the specified disklabel. 1023 * Return 0 on success, 1 on failure. 1024 */ 1025 static int 1026 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1027 { 1028 struct partition *pp; 1029 char *cp, *endp; 1030 const char **cpp; 1031 u_long v; 1032 1033 pp = &lp->d_partitions[part]; 1034 cp = NULL; 1035 1036 v = 0; 1037 NXTWORD(part_size_type[part],v); 1038 if (v == 0 && part_size_type[part] != '*') { 1039 fprintf(stderr, 1040 "line %d: %s: bad partition size\n", lineno, cp); 1041 return (1); 1042 } 1043 pp->p_size = v; 1044 1045 v = 0; 1046 NXTWORD(part_offset_type[part],v); 1047 if (v == 0 && part_offset_type[part] != '*' && 1048 part_offset_type[part] != '\0') { 1049 fprintf(stderr, 1050 "line %d: %s: bad partition offset\n", lineno, cp); 1051 return (1); 1052 } 1053 pp->p_offset = v; 1054 if (tp == NULL) { 1055 fprintf(stderr, "line %d: missing file system type\n", lineno); 1056 return (1); 1057 } 1058 cp = tp, tp = word(cp); 1059 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1060 if (*cpp && !strcmp(*cpp, cp)) 1061 break; 1062 if (*cpp != NULL) { 1063 pp->p_fstype = cpp - fstypenames; 1064 } else { 1065 if (isdigit(*cp)) { 1066 errno = 0; 1067 v = strtoul(cp, &endp, 10); 1068 if (errno != 0 || *endp != '\0') 1069 v = FSMAXTYPES; 1070 } else 1071 v = FSMAXTYPES; 1072 if (v >= FSMAXTYPES) { 1073 fprintf(stderr, 1074 "line %d: Warning, unknown file system type %s\n", 1075 lineno, cp); 1076 v = FS_UNUSED; 1077 } 1078 pp->p_fstype = v; 1079 } 1080 1081 switch (pp->p_fstype) { 1082 case FS_UNUSED: 1083 case FS_BSDFFS: 1084 case FS_BSDLFS: 1085 /* accept defaults for fsize/frag/cpg */ 1086 if (tp) { 1087 NXTNUM(pp->p_fsize); 1088 if (pp->p_fsize == 0) 1089 break; 1090 NXTNUM(v); 1091 pp->p_frag = v / pp->p_fsize; 1092 if (tp != NULL) 1093 NXTNUM(pp->p_cpg); 1094 } 1095 /* else default to 0's */ 1096 break; 1097 default: 1098 break; 1099 } 1100 return (0); 1101 } 1102 1103 /* 1104 * Check disklabel for errors and fill in 1105 * derived fields according to supplied values. 1106 */ 1107 static int 1108 checklabel(struct disklabel *lp) 1109 { 1110 struct partition *pp; 1111 int i, errors = 0; 1112 char part; 1113 u_long base_offset, needed, total_size, total_percent, current_offset; 1114 long free_space; 1115 int seen_default_offset; 1116 int hog_part; 1117 int j; 1118 struct partition *pp2; 1119 1120 if (lp == NULL) 1121 lp = &lab; 1122 1123 if (allfields) { 1124 1125 if (lp->d_secsize == 0) { 1126 fprintf(stderr, "sector size 0\n"); 1127 return (1); 1128 } 1129 if (lp->d_nsectors == 0) { 1130 fprintf(stderr, "sectors/track 0\n"); 1131 return (1); 1132 } 1133 if (lp->d_ntracks == 0) { 1134 fprintf(stderr, "tracks/cylinder 0\n"); 1135 return (1); 1136 } 1137 if (lp->d_ncylinders == 0) { 1138 fprintf(stderr, "cylinders/unit 0\n"); 1139 errors++; 1140 } 1141 if (lp->d_rpm == 0) 1142 warnx("revolutions/minute 0"); 1143 if (lp->d_secpercyl == 0) 1144 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1145 if (lp->d_secperunit == 0) 1146 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1147 if (lp->d_bbsize == 0) { 1148 fprintf(stderr, "boot block size 0\n"); 1149 errors++; 1150 } else if (lp->d_bbsize % lp->d_secsize) 1151 warnx("boot block size %% sector-size != 0"); 1152 if (lp->d_npartitions > MAXPARTITIONS) 1153 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1154 (u_long)lp->d_npartitions, MAXPARTITIONS); 1155 } else { 1156 struct disklabel *vl; 1157 1158 vl = getvirginlabel(); 1159 lp->d_secsize = vl->d_secsize; 1160 lp->d_nsectors = vl->d_nsectors; 1161 lp->d_ntracks = vl->d_ntracks; 1162 lp->d_ncylinders = vl->d_ncylinders; 1163 lp->d_rpm = vl->d_rpm; 1164 lp->d_interleave = vl->d_interleave; 1165 lp->d_secpercyl = vl->d_secpercyl; 1166 lp->d_secperunit = vl->d_secperunit; 1167 lp->d_bbsize = vl->d_bbsize; 1168 lp->d_npartitions = vl->d_npartitions; 1169 } 1170 1171 1172 /* first allocate space to the partitions, then offsets */ 1173 total_size = 0; /* in sectors */ 1174 total_percent = 0; /* in percent */ 1175 hog_part = -1; 1176 /* find all fixed partitions */ 1177 for (i = 0; i < lp->d_npartitions; i++) { 1178 pp = &lp->d_partitions[i]; 1179 if (part_set[i]) { 1180 if (part_size_type[i] == '*') { 1181 if (i == RAW_PART) { 1182 pp->p_size = lp->d_secperunit; 1183 } else { 1184 if (hog_part != -1) 1185 warnx("Too many '*' partitions (%c and %c)", 1186 hog_part + 'a',i + 'a'); 1187 else 1188 hog_part = i; 1189 } 1190 } else { 1191 off_t size; 1192 1193 size = pp->p_size; 1194 switch (part_size_type[i]) { 1195 case '%': 1196 total_percent += size; 1197 break; 1198 case 't': 1199 case 'T': 1200 size *= 1024ULL; 1201 /* FALLTHROUGH */ 1202 case 'g': 1203 case 'G': 1204 size *= 1024ULL; 1205 /* FALLTHROUGH */ 1206 case 'm': 1207 case 'M': 1208 size *= 1024ULL; 1209 /* FALLTHROUGH */ 1210 case 'k': 1211 case 'K': 1212 size *= 1024ULL; 1213 break; 1214 case '\0': 1215 break; 1216 default: 1217 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1218 part_size_type[i], i + 'a'); 1219 break; 1220 } 1221 /* don't count %'s yet */ 1222 if (part_size_type[i] != '%') { 1223 /* 1224 * for all not in sectors, convert to 1225 * sectors 1226 */ 1227 if (part_size_type[i] != '\0') { 1228 if (size % lp->d_secsize != 0) 1229 warnx("partition %c not an integer number of sectors", 1230 i + 'a'); 1231 size /= lp->d_secsize; 1232 pp->p_size = size; 1233 } 1234 /* else already in sectors */ 1235 if (i != RAW_PART) 1236 total_size += size; 1237 } 1238 } 1239 } 1240 } 1241 1242 /* Find out the total free space, excluding the boot block area. */ 1243 base_offset = BBSIZE / secsize; 1244 free_space = 0; 1245 for (i = 0; i < lp->d_npartitions; i++) { 1246 pp = &lp->d_partitions[i]; 1247 if (!part_set[i] || i == RAW_PART || 1248 part_size_type[i] == '%' || part_size_type[i] == '*') 1249 continue; 1250 if (pp->p_offset > base_offset) 1251 free_space += pp->p_offset - base_offset; 1252 if (pp->p_offset + pp->p_size > base_offset) 1253 base_offset = pp->p_offset + pp->p_size; 1254 } 1255 if (base_offset < lp->d_secperunit) 1256 free_space += lp->d_secperunit - base_offset; 1257 1258 /* handle % partitions - note %'s don't need to add up to 100! */ 1259 if (total_percent != 0) { 1260 if (total_percent > 100) { 1261 fprintf(stderr,"total percentage %lu is greater than 100\n", 1262 total_percent); 1263 errors++; 1264 } 1265 1266 if (free_space > 0) { 1267 for (i = 0; i < lp->d_npartitions; i++) { 1268 pp = &lp->d_partitions[i]; 1269 if (part_set[i] && part_size_type[i] == '%') { 1270 /* careful of overflows! and integer roundoff */ 1271 pp->p_size = ((double)pp->p_size/100) * free_space; 1272 total_size += pp->p_size; 1273 1274 /* FIX we can lose a sector or so due to roundoff per 1275 partition. A more complex algorithm could avoid that */ 1276 } 1277 } 1278 } else { 1279 fprintf(stderr, 1280 "%ld sectors available to give to '*' and '%%' partitions\n", 1281 free_space); 1282 errors++; 1283 /* fix? set all % partitions to size 0? */ 1284 } 1285 } 1286 /* give anything remaining to the hog partition */ 1287 if (hog_part != -1) { 1288 /* 1289 * Find the range of offsets usable by '*' partitions around 1290 * the hog partition and how much space they need. 1291 */ 1292 needed = 0; 1293 base_offset = BBSIZE / secsize; 1294 for (i = hog_part - 1; i >= 0; i--) { 1295 pp = &lp->d_partitions[i]; 1296 if (!part_set[i] || i == RAW_PART) 1297 continue; 1298 if (part_offset_type[i] == '*') { 1299 needed += pp->p_size; 1300 continue; 1301 } 1302 base_offset = pp->p_offset + pp->p_size; 1303 break; 1304 } 1305 current_offset = lp->d_secperunit; 1306 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1307 pp = &lp->d_partitions[i]; 1308 if (!part_set[i] || i == RAW_PART) 1309 continue; 1310 if (part_offset_type[i] == '*') { 1311 needed += pp->p_size; 1312 continue; 1313 } 1314 current_offset = pp->p_offset; 1315 } 1316 1317 if (current_offset - base_offset <= needed) { 1318 fprintf(stderr, "Cannot find space for partition %c\n", 1319 hog_part + 'a'); 1320 fprintf(stderr, 1321 "Need more than %lu sectors between %lu and %lu\n", 1322 needed, base_offset, current_offset); 1323 errors++; 1324 lp->d_partitions[hog_part].p_size = 0; 1325 } else { 1326 lp->d_partitions[hog_part].p_size = current_offset - 1327 base_offset - needed; 1328 total_size += lp->d_partitions[hog_part].p_size; 1329 } 1330 } 1331 1332 /* Now set the offsets for each partition */ 1333 current_offset = BBSIZE / secsize; /* in sectors */ 1334 seen_default_offset = 0; 1335 for (i = 0; i < lp->d_npartitions; i++) { 1336 part = 'a' + i; 1337 pp = &lp->d_partitions[i]; 1338 if (part_set[i]) { 1339 if (part_offset_type[i] == '*') { 1340 if (i == RAW_PART) { 1341 pp->p_offset = 0; 1342 } else { 1343 pp->p_offset = current_offset; 1344 seen_default_offset = 1; 1345 } 1346 } else { 1347 /* allow them to be out of order for old-style tables */ 1348 if (pp->p_offset < current_offset && 1349 seen_default_offset && i != RAW_PART && 1350 pp->p_fstype != FS_VINUM) { 1351 fprintf(stderr, 1352 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1353 (long)pp->p_offset,i+'a',current_offset); 1354 fprintf(stderr, 1355 "Labels with any *'s for offset must be in ascending order by sector\n"); 1356 errors++; 1357 } else if (pp->p_offset != current_offset && 1358 i != RAW_PART && seen_default_offset) { 1359 /* 1360 * this may give unneeded warnings if 1361 * partitions are out-of-order 1362 */ 1363 warnx( 1364 "Offset %ld for partition %c doesn't match expected value %ld", 1365 (long)pp->p_offset, i + 'a', current_offset); 1366 } 1367 } 1368 if (i != RAW_PART) 1369 current_offset = pp->p_offset + pp->p_size; 1370 } 1371 } 1372 1373 for (i = 0; i < lp->d_npartitions; i++) { 1374 part = 'a' + i; 1375 pp = &lp->d_partitions[i]; 1376 if (pp->p_size == 0 && pp->p_offset != 0) 1377 warnx("partition %c: size 0, but offset %lu", 1378 part, (u_long)pp->p_offset); 1379 #ifdef notdef 1380 if (pp->p_size % lp->d_secpercyl) 1381 warnx("partition %c: size %% cylinder-size != 0", 1382 part); 1383 if (pp->p_offset % lp->d_secpercyl) 1384 warnx("partition %c: offset %% cylinder-size != 0", 1385 part); 1386 #endif 1387 if (pp->p_offset > lp->d_secperunit) { 1388 fprintf(stderr, 1389 "partition %c: offset past end of unit\n", part); 1390 errors++; 1391 } 1392 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1393 fprintf(stderr, 1394 "partition %c: partition extends past end of unit\n", 1395 part); 1396 errors++; 1397 } 1398 if (i == RAW_PART) { 1399 if (pp->p_fstype != FS_UNUSED) 1400 warnx("partition %c is not marked as unused!",part); 1401 if (pp->p_offset != 0) 1402 warnx("partition %c doesn't start at 0!",part); 1403 if (pp->p_size != lp->d_secperunit) 1404 warnx("partition %c doesn't cover the whole unit!",part); 1405 1406 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1407 (pp->p_size != lp->d_secperunit)) { 1408 warnx("An incorrect partition %c may cause problems for " 1409 "standard system utilities",part); 1410 } 1411 } 1412 1413 /* check for overlaps */ 1414 /* this will check for all possible overlaps once and only once */ 1415 for (j = 0; j < i; j++) { 1416 pp2 = &lp->d_partitions[j]; 1417 if (j != RAW_PART && i != RAW_PART && 1418 pp->p_fstype != FS_VINUM && 1419 pp2->p_fstype != FS_VINUM && 1420 part_set[i] && part_set[j]) { 1421 if (pp2->p_offset < pp->p_offset + pp->p_size && 1422 (pp2->p_offset + pp2->p_size > pp->p_offset || 1423 pp2->p_offset >= pp->p_offset)) { 1424 fprintf(stderr,"partitions %c and %c overlap!\n", 1425 j + 'a', i + 'a'); 1426 errors++; 1427 } 1428 } 1429 } 1430 } 1431 for (; i < lp->d_npartitions; i++) { 1432 part = 'a' + i; 1433 pp = &lp->d_partitions[i]; 1434 if (pp->p_size || pp->p_offset) 1435 warnx("unused partition %c: size %d offset %lu", 1436 'a' + i, pp->p_size, (u_long)pp->p_offset); 1437 } 1438 return (errors); 1439 } 1440 1441 /* 1442 * When operating on a "virgin" disk, try getting an initial label 1443 * from the associated device driver. This might work for all device 1444 * drivers that are able to fetch some initial device parameters 1445 * without even having access to a (BSD) disklabel, like SCSI disks, 1446 * most IDE drives, or vn devices. 1447 * 1448 * The device name must be given in its "canonical" form. 1449 */ 1450 static struct disklabel * 1451 getvirginlabel(void) 1452 { 1453 static struct disklabel loclab; 1454 struct partition *dp; 1455 int f; 1456 u_int u; 1457 1458 if ((f = open(specname, O_RDONLY)) == -1) { 1459 warn("cannot open %s", specname); 1460 return (NULL); 1461 } 1462 1463 if (is_file) 1464 get_file_parms(f); 1465 else { 1466 mediasize = g_mediasize(f); 1467 secsize = g_sectorsize(f); 1468 if (secsize < 0 || mediasize < 0) { 1469 close (f); 1470 return (NULL); 1471 } 1472 } 1473 memset(&loclab, 0, sizeof loclab); 1474 loclab.d_magic = DISKMAGIC; 1475 loclab.d_magic2 = DISKMAGIC; 1476 loclab.d_secsize = secsize; 1477 loclab.d_secperunit = mediasize / secsize; 1478 1479 /* 1480 * Nobody in these enligthened days uses the CHS geometry for 1481 * anything, but nontheless try to get it right. If we fail 1482 * to get any good ideas from the device, construct something 1483 * which is IBM-PC friendly. 1484 */ 1485 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1486 loclab.d_nsectors = u; 1487 else 1488 loclab.d_nsectors = 63; 1489 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1490 loclab.d_ntracks = u; 1491 else if (loclab.d_secperunit <= 63*1*1024) 1492 loclab.d_ntracks = 1; 1493 else if (loclab.d_secperunit <= 63*16*1024) 1494 loclab.d_ntracks = 16; 1495 else 1496 loclab.d_ntracks = 255; 1497 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1498 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1499 loclab.d_npartitions = DEFPARTITIONS; 1500 1501 /* Various (unneeded) compat stuff */ 1502 loclab.d_rpm = 3600; 1503 loclab.d_bbsize = BBSIZE; 1504 loclab.d_interleave = 1; 1505 strncpy(loclab.d_typename, "amnesiac", 1506 sizeof(loclab.d_typename)); 1507 1508 dp = &loclab.d_partitions[RAW_PART]; 1509 dp->p_size = loclab.d_secperunit; 1510 loclab.d_checksum = dkcksum(&loclab); 1511 close (f); 1512 return (&loclab); 1513 } 1514 1515 static void 1516 usage(void) 1517 { 1518 1519 fprintf(stderr, 1520 "%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", 1521 "usage: bsdlabel disk", 1522 "\t\t(to read label)", 1523 " bsdlabel -w [-n] [-m machine] disk [type]", 1524 "\t\t(to write label with existing boot program)", 1525 " bsdlabel -e [-n] [-m machine] disk", 1526 "\t\t(to edit label)", 1527 " bsdlabel -R [-n] [-m machine] disk protofile", 1528 "\t\t(to restore label with existing boot program)", 1529 " bsdlabel -B [-b boot] [-m machine] disk", 1530 "\t\t(to install boot program with existing on-disk label)", 1531 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1532 "\t\t(to write label and install boot program)", 1533 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1534 "\t\t(to restore label and install boot program)" 1535 ); 1536 exit(1); 1537 } 1538