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 u_int 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 static int alphacksum = 133 #if defined(__alpha__) 134 1; 135 #else 136 0; 137 #endif 138 139 enum { 140 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 141 } op = UNSPEC; 142 143 144 static int disable_write; /* set to disable writing to disk label */ 145 static int is_file; /* work on a file (abs. pathname), "-f" opt. */ 146 147 int 148 main(int argc, char *argv[]) 149 { 150 FILE *t; 151 int ch, error, fd; 152 const char *name; 153 154 error = 0; 155 name = NULL; 156 157 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1) 158 switch (ch) { 159 case 'A': 160 allfields = 1; 161 break; 162 case 'B': 163 ++installboot; 164 break; 165 case 'b': 166 xxboot = optarg; 167 break; 168 case 'f': 169 is_file=1; 170 break; 171 case 'm': 172 if (!strcmp(optarg, "i386") || 173 !strcmp(optarg, "amd64") || 174 !strcmp(optarg, "ia64") || 175 !strcmp(optarg, "pc98")) { 176 labelsoffset = 1; 177 labeloffset = 0; 178 bbsize = 8192; 179 alphacksum = 0; 180 } else if (!strcmp(optarg, "alpha")) { 181 labelsoffset = 0; 182 labeloffset = 64; 183 bbsize = 8192; 184 alphacksum = 1; 185 } else { 186 errx(1, "Unsupported architecture"); 187 } 188 break; 189 case 'n': 190 disable_write = 1; 191 break; 192 case 'R': 193 if (op != UNSPEC) 194 usage(); 195 op = RESTORE; 196 break; 197 case 'e': 198 if (op != UNSPEC) 199 usage(); 200 op = EDIT; 201 break; 202 case 'r': 203 /* 204 * We accept and ignode -r for compatibility with 205 * historically disklabel usage. 206 */ 207 break; 208 case 'w': 209 if (op != UNSPEC) 210 usage(); 211 op = WRITE; 212 break; 213 case '?': 214 default: 215 usage(); 216 } 217 argc -= optind; 218 argv += optind; 219 220 if (argc < 1) 221 usage(); 222 if (labelsoffset < 0 || labeloffset < 0) 223 errx(1, "a -m <architecture> option must be specified"); 224 225 /* Figure out the names of the thing we're working on */ 226 if (is_file) { 227 specname = argv[0]; 228 } else { 229 specname = g_device_path(argv[0]); 230 if (specname == NULL) { 231 warn("unable to get correct path for %s", argv[0]); 232 return(1); 233 } 234 fd = open(specname, O_RDONLY); 235 if (fd < 0) { 236 warn("error opening %s", specname); 237 return(1); 238 } 239 pname = g_providername(fd); 240 if (pname == NULL) { 241 warn("error getting providername for %s", specname); 242 close(fd); 243 return(1); 244 } 245 close(fd); 246 } 247 248 if (installboot && op == UNSPEC) 249 op = WRITEBOOT; 250 else if (op == UNSPEC) 251 op = READ; 252 253 switch(op) { 254 255 case UNSPEC: 256 break; 257 258 case EDIT: 259 if (argc != 1) 260 usage(); 261 readlabel(1); 262 fixlabel(&lab); 263 error = edit(); 264 break; 265 266 case READ: 267 if (argc != 1) 268 usage(); 269 readlabel(1); 270 display(stdout, NULL); 271 error = checklabel(NULL); 272 break; 273 274 case RESTORE: 275 if (argc != 2) 276 usage(); 277 if (!(t = fopen(argv[1], "r"))) 278 err(4, "fopen %s", argv[1]); 279 readlabel(0); 280 if (!getasciilabel(t, &lab)) 281 exit(1); 282 error = writelabel(); 283 break; 284 285 case WRITE: 286 if (argc == 2) 287 name = argv[1]; 288 else if (argc == 1) 289 name = "auto"; 290 else 291 usage(); 292 readlabel(0); 293 makelabel(name, &lab); 294 fixlabel(&lab); 295 if (checklabel(NULL) == 0) 296 error = writelabel(); 297 break; 298 299 case WRITEBOOT: 300 301 readlabel(1); 302 fixlabel(&lab); 303 if (argc == 2) 304 makelabel(argv[1], &lab); 305 if (checklabel(NULL) == 0) 306 error = writelabel(); 307 break; 308 } 309 exit(error); 310 } 311 312 static void 313 fixlabel(struct disklabel *lp) 314 { 315 struct partition *dp; 316 int i; 317 318 for (i = 0; i < lp->d_npartitions; i++) { 319 if (i == RAW_PART) 320 continue; 321 if (lp->d_partitions[i].p_size) 322 return; 323 } 324 325 dp = &lp->d_partitions[0]; 326 dp->p_offset = BBSIZE / secsize; 327 dp->p_size = lp->d_secperunit - dp->p_offset; 328 } 329 330 /* 331 * Construct a prototype disklabel from /etc/disktab. 332 */ 333 static void 334 makelabel(const char *type, struct disklabel *lp) 335 { 336 struct disklabel *dp; 337 338 if (strcmp(type, "auto") == 0) 339 dp = getvirginlabel(); 340 else 341 dp = getdiskbyname(type); 342 if (dp == NULL) 343 errx(1, "%s: unknown disk type", type); 344 *lp = *dp; 345 bzero(lp->d_packname, sizeof(lp->d_packname)); 346 } 347 348 static void 349 readboot(void) 350 { 351 int fd; 352 struct stat st; 353 uint64_t *p; 354 355 if (xxboot == NULL) 356 xxboot = "/boot/boot"; 357 fd = open(xxboot, O_RDONLY); 358 if (fd < 0) 359 err(1, "cannot open %s", xxboot); 360 fstat(fd, &st); 361 if (alphacksum && st.st_size <= BBSIZE - 512) { 362 if (read(fd, bootarea + 512, st.st_size) != st.st_size) 363 err(1, "read error %s", xxboot); 364 365 /* 366 * Set the location and length so SRM can find the 367 * boot blocks. 368 */ 369 p = (uint64_t *)bootarea; 370 p[60] = (st.st_size + secsize - 1) / secsize; 371 p[61] = 1; 372 p[62] = 0; 373 return; 374 } else if ((!alphacksum) && st.st_size <= BBSIZE) { 375 if (read(fd, bootarea, st.st_size) != st.st_size) 376 err(1, "read error %s", xxboot); 377 return; 378 } 379 errx(1, "boot code %s is wrong size", xxboot); 380 } 381 382 static int 383 geom_bsd_available(void) 384 { 385 struct gclass *class; 386 struct gmesh mesh; 387 int error; 388 389 error = geom_gettree(&mesh); 390 if (error != 0) 391 errc(1, error, "Cannot get GEOM tree"); 392 393 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 394 if (strcmp(class->lg_name, "BSD") == 0) { 395 geom_deletetree(&mesh); 396 return (1); 397 } 398 } 399 400 geom_deletetree(&mesh); 401 402 return (0); 403 } 404 405 static int 406 writelabel(void) 407 { 408 uint64_t *p, sum; 409 int i, fd, serrno; 410 struct gctl_req *grq; 411 char const *errstr; 412 struct disklabel *lp = &lab; 413 414 if (disable_write) { 415 warnx("write to disk label supressed - label was as follows:"); 416 display(stdout, NULL); 417 return (0); 418 } 419 420 lp->d_magic = DISKMAGIC; 421 lp->d_magic2 = DISKMAGIC; 422 lp->d_checksum = 0; 423 lp->d_checksum = dkcksum(lp); 424 if (installboot) 425 readboot(); 426 for (i = 0; i < lab.d_npartitions; i++) 427 if (lab.d_partitions[i].p_size) 428 lab.d_partitions[i].p_offset += lba_offset; 429 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 430 lp); 431 if (alphacksum) { 432 /* Generate the bootblock checksum for the SRM console. */ 433 for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++) 434 sum += p[i]; 435 p[63] = sum; 436 } 437 438 fd = open(specname, O_RDWR); 439 if (fd < 0) { 440 if (is_file) { 441 warn("cannot open file %s for writing label", specname); 442 return(1); 443 } else 444 serrno = errno; 445 446 /* Give up if GEOM_BSD is not available. */ 447 if (geom_bsd_available() == 0) { 448 warnc(serrno, "%s", specname); 449 return (1); 450 } 451 452 grq = gctl_get_handle(); 453 gctl_ro_param(grq, "verb", -1, "write label"); 454 gctl_ro_param(grq, "class", -1, "BSD"); 455 gctl_ro_param(grq, "geom", -1, pname); 456 gctl_ro_param(grq, "label", 148+16*8, 457 bootarea + labeloffset + labelsoffset * secsize); 458 errstr = gctl_issue(grq); 459 if (errstr != NULL) { 460 warnx("%s", errstr); 461 gctl_free(grq); 462 return(1); 463 } 464 gctl_free(grq); 465 if (installboot) { 466 grq = gctl_get_handle(); 467 gctl_ro_param(grq, "verb", -1, "write bootcode"); 468 gctl_ro_param(grq, "class", -1, "BSD"); 469 gctl_ro_param(grq, "geom", -1, pname); 470 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 471 errstr = gctl_issue(grq); 472 if (errstr != NULL) { 473 warnx("%s", errstr); 474 gctl_free(grq); 475 return (1); 476 } 477 gctl_free(grq); 478 } 479 } else { 480 if (write(fd, bootarea, bbsize) != bbsize) { 481 warn("write %s", specname); 482 close (fd); 483 return (1); 484 } 485 close (fd); 486 } 487 return (0); 488 } 489 490 static void 491 get_file_parms(int f) 492 { 493 int i; 494 struct stat sb; 495 496 if (fstat(f, &sb) != 0) 497 err(4, "fstat failed"); 498 i = sb.st_mode & S_IFMT; 499 if (i != S_IFREG && i != S_IFLNK) 500 errx(4, "%s is not a valid file or link", specname); 501 secsize = DEV_BSIZE; 502 mediasize = sb.st_size; 503 } 504 505 /* 506 * Fetch disklabel for disk. 507 */ 508 static int 509 readlabel(int flag) 510 { 511 ssize_t nbytes; 512 uint32_t lba; 513 int f, i; 514 int error; 515 516 f = open(specname, O_RDONLY); 517 if (f < 0) 518 err(1, specname); 519 if (is_file) 520 get_file_parms(f); 521 else { 522 mediasize = g_mediasize(f); 523 secsize = g_sectorsize(f); 524 if (secsize < 0 || mediasize < 0) 525 err(4, "cannot get disk geometry"); 526 } 527 if (mediasize > (off_t)0xffffffff * secsize) 528 errx(1, 529 "disks with more than 2^32-1 sectors are not supported"); 530 (void)lseek(f, (off_t)0, SEEK_SET); 531 nbytes = read(f, bootarea, BBSIZE); 532 if (nbytes == -1) 533 err(4, "%s read", specname); 534 if (nbytes != BBSIZE) 535 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 536 close (f); 537 error = bsd_disklabel_le_dec( 538 bootarea + (labeloffset + labelsoffset * secsize), 539 &lab, MAXPARTITIONS); 540 if (flag && error) 541 errx(1, "%s: no valid label found", specname); 542 543 if (is_file) 544 return(0); 545 546 /* 547 * Compensate for absolute block addressing by finding the 548 * smallest partition offset and if the offset of the 'c' 549 * partition is equal to that, subtract it from all offsets. 550 */ 551 lba = ~0; 552 for (i = 0; i < lab.d_npartitions; i++) { 553 if (lab.d_partitions[i].p_size) 554 lba = MIN(lba, lab.d_partitions[i].p_offset); 555 } 556 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 557 for (i = 0; i < lab.d_npartitions; i++) { 558 if (lab.d_partitions[i].p_size) 559 lab.d_partitions[i].p_offset -= lba; 560 } 561 /* 562 * Save the offset so that we can write the label 563 * back with absolute block addresses. 564 */ 565 lba_offset = lba; 566 } 567 return (error); 568 } 569 570 571 static void 572 display(FILE *f, const struct disklabel *lp) 573 { 574 int i, j; 575 const struct partition *pp; 576 577 if (lp == NULL) 578 lp = &lab; 579 580 fprintf(f, "# %s:\n", specname); 581 if (allfields) { 582 if (lp->d_type < DKMAXTYPES) 583 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 584 else 585 fprintf(f, "type: %u\n", lp->d_type); 586 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 587 lp->d_typename); 588 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 589 lp->d_packname); 590 fprintf(f, "flags:"); 591 if (lp->d_flags & D_REMOVABLE) 592 fprintf(f, " removeable"); 593 if (lp->d_flags & D_ECC) 594 fprintf(f, " ecc"); 595 if (lp->d_flags & D_BADSECT) 596 fprintf(f, " badsect"); 597 fprintf(f, "\n"); 598 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 599 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 600 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 601 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 602 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 603 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 604 fprintf(f, "rpm: %u\n", lp->d_rpm); 605 fprintf(f, "interleave: %u\n", lp->d_interleave); 606 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 607 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 608 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 609 (u_long)lp->d_headswitch); 610 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 611 (u_long)lp->d_trkseek); 612 fprintf(f, "drivedata: "); 613 for (i = NDDATA - 1; i >= 0; i--) 614 if (lp->d_drivedata[i]) 615 break; 616 if (i < 0) 617 i = 0; 618 for (j = 0; j <= i; j++) 619 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 620 fprintf(f, "\n\n"); 621 } 622 fprintf(f, "%u partitions:\n", lp->d_npartitions); 623 fprintf(f, 624 "# size offset fstype [fsize bsize bps/cpg]\n"); 625 pp = lp->d_partitions; 626 for (i = 0; i < lp->d_npartitions; i++, pp++) { 627 if (pp->p_size) { 628 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 629 (u_long)pp->p_size, (u_long)pp->p_offset); 630 if (pp->p_fstype < FSMAXTYPES) 631 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 632 else 633 fprintf(f, "%8d", pp->p_fstype); 634 switch (pp->p_fstype) { 635 636 case FS_UNUSED: /* XXX */ 637 fprintf(f, " %5lu %5lu %5.5s ", 638 (u_long)pp->p_fsize, 639 (u_long)(pp->p_fsize * pp->p_frag), ""); 640 break; 641 642 case FS_BSDFFS: 643 fprintf(f, " %5lu %5lu %5u ", 644 (u_long)pp->p_fsize, 645 (u_long)(pp->p_fsize * pp->p_frag), 646 pp->p_cpg); 647 break; 648 649 case FS_BSDLFS: 650 fprintf(f, " %5lu %5lu %5d", 651 (u_long)pp->p_fsize, 652 (u_long)(pp->p_fsize * pp->p_frag), 653 pp->p_cpg); 654 break; 655 656 default: 657 fprintf(f, "%20.20s", ""); 658 break; 659 } 660 if (i == RAW_PART) { 661 fprintf(f, " # \"raw\" part, don't edit"); 662 } 663 fprintf(f, "\n"); 664 } 665 } 666 fflush(f); 667 } 668 669 static int 670 edit(void) 671 { 672 int c, fd; 673 struct disklabel label; 674 FILE *fp; 675 676 if ((fd = mkstemp(tmpfil)) == -1 || 677 (fp = fdopen(fd, "w")) == NULL) { 678 warnx("can't create %s", tmpfil); 679 return (1); 680 } 681 display(fp, NULL); 682 fclose(fp); 683 for (;;) { 684 if (!editit()) 685 break; 686 fp = fopen(tmpfil, "r"); 687 if (fp == NULL) { 688 warnx("can't reopen %s for reading", tmpfil); 689 break; 690 } 691 bzero((char *)&label, sizeof(label)); 692 c = getasciilabel(fp, &label); 693 fclose(fp); 694 if (c) { 695 lab = label; 696 if (writelabel() == 0) { 697 (void) unlink(tmpfil); 698 return (0); 699 } 700 } 701 printf("re-edit the label? [y]: "); 702 fflush(stdout); 703 c = getchar(); 704 if (c != EOF && c != (int)'\n') 705 while (getchar() != (int)'\n') 706 ; 707 if (c == (int)'n') 708 break; 709 } 710 (void) unlink(tmpfil); 711 return (1); 712 } 713 714 static int 715 editit(void) 716 { 717 int pid, xpid; 718 int locstat, omask; 719 const char *ed; 720 uid_t uid; 721 gid_t gid; 722 723 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 724 while ((pid = fork()) < 0) { 725 if (errno == EPROCLIM) { 726 warnx("you have too many processes"); 727 return(0); 728 } 729 if (errno != EAGAIN) { 730 warn("fork"); 731 return(0); 732 } 733 sleep(1); 734 } 735 if (pid == 0) { 736 sigsetmask(omask); 737 gid = getgid(); 738 if (setresgid(gid, gid, gid) == -1) 739 err(1, "setresgid"); 740 uid = getuid(); 741 if (setresuid(uid, uid, uid) == -1) 742 err(1, "setresuid"); 743 if ((ed = getenv("EDITOR")) == (char *)0) 744 ed = DEFEDITOR; 745 execlp(ed, ed, tmpfil, (char *)0); 746 err(1, "%s", ed); 747 } 748 while ((xpid = wait(&locstat)) >= 0) 749 if (xpid == pid) 750 break; 751 sigsetmask(omask); 752 return(!locstat); 753 } 754 755 static char * 756 skip(char *cp) 757 { 758 759 while (*cp != '\0' && isspace(*cp)) 760 cp++; 761 if (*cp == '\0' || *cp == '#') 762 return (NULL); 763 return (cp); 764 } 765 766 static char * 767 word(char *cp) 768 { 769 char c; 770 771 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 772 cp++; 773 if ((c = *cp) != '\0') { 774 *cp++ = '\0'; 775 if (c != '#') 776 return (skip(cp)); 777 } 778 return (NULL); 779 } 780 781 /* 782 * Read an ascii label in from fd f, 783 * in the same format as that put out by display(), 784 * and fill in lp. 785 */ 786 static int 787 getasciilabel(FILE *f, struct disklabel *lp) 788 { 789 char *cp, *endp; 790 const char **cpp; 791 u_int part; 792 char *tp, line[BUFSIZ]; 793 u_long v; 794 int lineno = 0, errors = 0; 795 int i; 796 797 makelabel("auto", lp); 798 bzero(&part_set, sizeof(part_set)); 799 bzero(&part_size_type, sizeof(part_size_type)); 800 bzero(&part_offset_type, sizeof(part_offset_type)); 801 lp->d_bbsize = BBSIZE; /* XXX */ 802 lp->d_sbsize = 0; /* XXX */ 803 while (fgets(line, sizeof(line) - 1, f)) { 804 lineno++; 805 if ((cp = index(line,'\n')) != 0) 806 *cp = '\0'; 807 cp = skip(line); 808 if (cp == NULL) 809 continue; 810 tp = index(cp, ':'); 811 if (tp == NULL) { 812 fprintf(stderr, "line %d: syntax error\n", lineno); 813 errors++; 814 continue; 815 } 816 *tp++ = '\0', tp = skip(tp); 817 if (!strcmp(cp, "type")) { 818 if (tp == NULL) 819 tp = unknown; 820 cpp = dktypenames; 821 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 822 if (*cpp && !strcmp(*cpp, tp)) { 823 lp->d_type = cpp - dktypenames; 824 break; 825 } 826 if (cpp < &dktypenames[DKMAXTYPES]) 827 continue; 828 errno = 0; 829 v = strtoul(tp, &endp, 10); 830 if (errno != 0 || *endp != '\0') 831 v = DKMAXTYPES; 832 if (v >= DKMAXTYPES) 833 fprintf(stderr, "line %d:%s %lu\n", lineno, 834 "Warning, unknown disk type", v); 835 else 836 lp->d_type = v; 837 continue; 838 } 839 if (!strcmp(cp, "flags")) { 840 for (v = 0; (cp = tp) && *cp != '\0';) { 841 tp = word(cp); 842 if (!strcmp(cp, "removeable")) 843 v |= D_REMOVABLE; 844 else if (!strcmp(cp, "ecc")) 845 v |= D_ECC; 846 else if (!strcmp(cp, "badsect")) 847 v |= D_BADSECT; 848 else { 849 fprintf(stderr, 850 "line %d: %s: bad flag\n", 851 lineno, cp); 852 errors++; 853 } 854 } 855 lp->d_flags = v; 856 continue; 857 } 858 if (!strcmp(cp, "drivedata")) { 859 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 860 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 861 tp = word(cp); 862 } 863 continue; 864 } 865 if (sscanf(cp, "%lu partitions", &v) == 1) { 866 if (v == 0 || v > MAXPARTITIONS) { 867 fprintf(stderr, 868 "line %d: bad # of partitions\n", lineno); 869 lp->d_npartitions = MAXPARTITIONS; 870 errors++; 871 } else 872 lp->d_npartitions = v; 873 continue; 874 } 875 if (tp == NULL) 876 tp = blank; 877 if (!strcmp(cp, "disk")) { 878 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 879 continue; 880 } 881 if (!strcmp(cp, "label")) { 882 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 883 continue; 884 } 885 if (!strcmp(cp, "bytes/sector")) { 886 v = strtoul(tp, NULL, 10); 887 if (v == 0 || (v % DEV_BSIZE) != 0) { 888 fprintf(stderr, 889 "line %d: %s: bad sector size\n", 890 lineno, tp); 891 errors++; 892 } else 893 lp->d_secsize = v; 894 continue; 895 } 896 if (!strcmp(cp, "sectors/track")) { 897 v = strtoul(tp, NULL, 10); 898 #if (ULONG_MAX != 0xffffffffUL) 899 if (v == 0 || v > 0xffffffff) 900 #else 901 if (v == 0) 902 #endif 903 { 904 fprintf(stderr, "line %d: %s: bad %s\n", 905 lineno, tp, cp); 906 errors++; 907 } else 908 lp->d_nsectors = v; 909 continue; 910 } 911 if (!strcmp(cp, "sectors/cylinder")) { 912 v = strtoul(tp, NULL, 10); 913 if (v == 0) { 914 fprintf(stderr, "line %d: %s: bad %s\n", 915 lineno, tp, cp); 916 errors++; 917 } else 918 lp->d_secpercyl = v; 919 continue; 920 } 921 if (!strcmp(cp, "tracks/cylinder")) { 922 v = strtoul(tp, NULL, 10); 923 if (v == 0) { 924 fprintf(stderr, "line %d: %s: bad %s\n", 925 lineno, tp, cp); 926 errors++; 927 } else 928 lp->d_ntracks = v; 929 continue; 930 } 931 if (!strcmp(cp, "cylinders")) { 932 v = strtoul(tp, NULL, 10); 933 if (v == 0) { 934 fprintf(stderr, "line %d: %s: bad %s\n", 935 lineno, tp, cp); 936 errors++; 937 } else 938 lp->d_ncylinders = v; 939 continue; 940 } 941 if (!strcmp(cp, "sectors/unit")) { 942 v = strtoul(tp, NULL, 10); 943 if (v == 0) { 944 fprintf(stderr, "line %d: %s: bad %s\n", 945 lineno, tp, cp); 946 errors++; 947 } else 948 lp->d_secperunit = v; 949 continue; 950 } 951 if (!strcmp(cp, "rpm")) { 952 v = strtoul(tp, NULL, 10); 953 if (v == 0 || v > USHRT_MAX) { 954 fprintf(stderr, "line %d: %s: bad %s\n", 955 lineno, tp, cp); 956 errors++; 957 } else 958 lp->d_rpm = v; 959 continue; 960 } 961 if (!strcmp(cp, "interleave")) { 962 v = strtoul(tp, NULL, 10); 963 if (v == 0 || v > USHRT_MAX) { 964 fprintf(stderr, "line %d: %s: bad %s\n", 965 lineno, tp, cp); 966 errors++; 967 } else 968 lp->d_interleave = v; 969 continue; 970 } 971 if (!strcmp(cp, "trackskew")) { 972 v = strtoul(tp, NULL, 10); 973 if (v > USHRT_MAX) { 974 fprintf(stderr, "line %d: %s: bad %s\n", 975 lineno, tp, cp); 976 errors++; 977 } else 978 lp->d_trackskew = v; 979 continue; 980 } 981 if (!strcmp(cp, "cylinderskew")) { 982 v = strtoul(tp, NULL, 10); 983 if (v > USHRT_MAX) { 984 fprintf(stderr, "line %d: %s: bad %s\n", 985 lineno, tp, cp); 986 errors++; 987 } else 988 lp->d_cylskew = v; 989 continue; 990 } 991 if (!strcmp(cp, "headswitch")) { 992 v = strtoul(tp, NULL, 10); 993 lp->d_headswitch = v; 994 continue; 995 } 996 if (!strcmp(cp, "track-to-track seek")) { 997 v = strtoul(tp, NULL, 10); 998 lp->d_trkseek = v; 999 continue; 1000 } 1001 /* the ':' was removed above */ 1002 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 1003 fprintf(stderr, 1004 "line %d: %s: Unknown disklabel field\n", lineno, 1005 cp); 1006 errors++; 1007 continue; 1008 } 1009 1010 /* Process a partition specification line. */ 1011 part = *cp - 'a'; 1012 if (part >= lp->d_npartitions) { 1013 fprintf(stderr, 1014 "line %d: partition name out of range a-%c: %s\n", 1015 lineno, 'a' + lp->d_npartitions - 1, cp); 1016 errors++; 1017 continue; 1018 } 1019 part_set[part] = 1; 1020 1021 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1022 errors++; 1023 break; 1024 } 1025 } 1026 errors += checklabel(lp); 1027 return (errors == 0); 1028 } 1029 1030 #define NXTNUM(n) do { \ 1031 if (tp == NULL) { \ 1032 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1033 return (1); \ 1034 } else { \ 1035 cp = tp, tp = word(cp); \ 1036 (n) = strtoul(cp, NULL, 10); \ 1037 } \ 1038 } while (0) 1039 1040 /* retain 1 character following number */ 1041 #define NXTWORD(w,n) do { \ 1042 if (tp == NULL) { \ 1043 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1044 return (1); \ 1045 } else { \ 1046 char *tmp; \ 1047 cp = tp, tp = word(cp); \ 1048 (n) = strtoul(cp, &tmp, 10); \ 1049 if (tmp) (w) = *tmp; \ 1050 } \ 1051 } while (0) 1052 1053 /* 1054 * Read a partition line into partition `part' in the specified disklabel. 1055 * Return 0 on success, 1 on failure. 1056 */ 1057 static int 1058 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1059 { 1060 struct partition *pp; 1061 char *cp, *endp; 1062 const char **cpp; 1063 u_long v; 1064 1065 pp = &lp->d_partitions[part]; 1066 cp = NULL; 1067 1068 v = 0; 1069 NXTWORD(part_size_type[part],v); 1070 if (v == 0 && part_size_type[part] != '*') { 1071 fprintf(stderr, 1072 "line %d: %s: bad partition size\n", lineno, cp); 1073 return (1); 1074 } 1075 pp->p_size = v; 1076 1077 v = 0; 1078 NXTWORD(part_offset_type[part],v); 1079 if (v == 0 && part_offset_type[part] != '*' && 1080 part_offset_type[part] != '\0') { 1081 fprintf(stderr, 1082 "line %d: %s: bad partition offset\n", lineno, cp); 1083 return (1); 1084 } 1085 pp->p_offset = v; 1086 if (tp == NULL) { 1087 fprintf(stderr, "line %d: missing file system type\n", lineno); 1088 return (1); 1089 } 1090 cp = tp, tp = word(cp); 1091 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1092 if (*cpp && !strcmp(*cpp, cp)) 1093 break; 1094 if (*cpp != NULL) { 1095 pp->p_fstype = cpp - fstypenames; 1096 } else { 1097 if (isdigit(*cp)) { 1098 errno = 0; 1099 v = strtoul(cp, &endp, 10); 1100 if (errno != 0 || *endp != '\0') 1101 v = FSMAXTYPES; 1102 } else 1103 v = FSMAXTYPES; 1104 if (v >= FSMAXTYPES) { 1105 fprintf(stderr, 1106 "line %d: Warning, unknown file system type %s\n", 1107 lineno, cp); 1108 v = FS_UNUSED; 1109 } 1110 pp->p_fstype = v; 1111 } 1112 1113 switch (pp->p_fstype) { 1114 case FS_UNUSED: 1115 case FS_BSDFFS: 1116 case FS_BSDLFS: 1117 /* accept defaults for fsize/frag/cpg */ 1118 if (tp) { 1119 NXTNUM(pp->p_fsize); 1120 if (pp->p_fsize == 0) 1121 break; 1122 NXTNUM(v); 1123 pp->p_frag = v / pp->p_fsize; 1124 if (tp != NULL) 1125 NXTNUM(pp->p_cpg); 1126 } 1127 /* else default to 0's */ 1128 break; 1129 default: 1130 break; 1131 } 1132 return (0); 1133 } 1134 1135 /* 1136 * Check disklabel for errors and fill in 1137 * derived fields according to supplied values. 1138 */ 1139 static int 1140 checklabel(struct disklabel *lp) 1141 { 1142 struct partition *pp; 1143 int i, errors = 0; 1144 char part; 1145 u_long base_offset, needed, total_size, total_percent, current_offset; 1146 long free_space; 1147 int seen_default_offset; 1148 int hog_part; 1149 int j; 1150 struct partition *pp2; 1151 1152 if (lp == NULL) 1153 lp = &lab; 1154 1155 if (allfields) { 1156 1157 if (lp->d_secsize == 0) { 1158 fprintf(stderr, "sector size 0\n"); 1159 return (1); 1160 } 1161 if (lp->d_nsectors == 0) { 1162 fprintf(stderr, "sectors/track 0\n"); 1163 return (1); 1164 } 1165 if (lp->d_ntracks == 0) { 1166 fprintf(stderr, "tracks/cylinder 0\n"); 1167 return (1); 1168 } 1169 if (lp->d_ncylinders == 0) { 1170 fprintf(stderr, "cylinders/unit 0\n"); 1171 errors++; 1172 } 1173 if (lp->d_rpm == 0) 1174 warnx("revolutions/minute 0"); 1175 if (lp->d_secpercyl == 0) 1176 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1177 if (lp->d_secperunit == 0) 1178 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1179 if (lp->d_bbsize == 0) { 1180 fprintf(stderr, "boot block size 0\n"); 1181 errors++; 1182 } else if (lp->d_bbsize % lp->d_secsize) 1183 warnx("boot block size %% sector-size != 0"); 1184 if (lp->d_npartitions > MAXPARTITIONS) 1185 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1186 (u_long)lp->d_npartitions, MAXPARTITIONS); 1187 } else { 1188 struct disklabel *vl; 1189 1190 vl = getvirginlabel(); 1191 lp->d_secsize = vl->d_secsize; 1192 lp->d_nsectors = vl->d_nsectors; 1193 lp->d_ntracks = vl->d_ntracks; 1194 lp->d_ncylinders = vl->d_ncylinders; 1195 lp->d_rpm = vl->d_rpm; 1196 lp->d_interleave = vl->d_interleave; 1197 lp->d_secpercyl = vl->d_secpercyl; 1198 lp->d_secperunit = vl->d_secperunit; 1199 lp->d_bbsize = vl->d_bbsize; 1200 lp->d_npartitions = vl->d_npartitions; 1201 } 1202 1203 1204 /* first allocate space to the partitions, then offsets */ 1205 total_size = 0; /* in sectors */ 1206 total_percent = 0; /* in percent */ 1207 hog_part = -1; 1208 /* find all fixed partitions */ 1209 for (i = 0; i < lp->d_npartitions; i++) { 1210 pp = &lp->d_partitions[i]; 1211 if (part_set[i]) { 1212 if (part_size_type[i] == '*') { 1213 if (i == RAW_PART) { 1214 pp->p_size = lp->d_secperunit; 1215 } else { 1216 if (hog_part != -1) 1217 warnx("Too many '*' partitions (%c and %c)", 1218 hog_part + 'a',i + 'a'); 1219 else 1220 hog_part = i; 1221 } 1222 } else { 1223 off_t size; 1224 1225 size = pp->p_size; 1226 switch (part_size_type[i]) { 1227 case '%': 1228 total_percent += size; 1229 break; 1230 case 't': 1231 case 'T': 1232 size *= 1024ULL; 1233 /* FALLTHROUGH */ 1234 case 'g': 1235 case 'G': 1236 size *= 1024ULL; 1237 /* FALLTHROUGH */ 1238 case 'm': 1239 case 'M': 1240 size *= 1024ULL; 1241 /* FALLTHROUGH */ 1242 case 'k': 1243 case 'K': 1244 size *= 1024ULL; 1245 break; 1246 case '\0': 1247 break; 1248 default: 1249 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1250 part_size_type[i], i + 'a'); 1251 break; 1252 } 1253 /* don't count %'s yet */ 1254 if (part_size_type[i] != '%') { 1255 /* 1256 * for all not in sectors, convert to 1257 * sectors 1258 */ 1259 if (part_size_type[i] != '\0') { 1260 if (size % lp->d_secsize != 0) 1261 warnx("partition %c not an integer number of sectors", 1262 i + 'a'); 1263 size /= lp->d_secsize; 1264 pp->p_size = size; 1265 } 1266 /* else already in sectors */ 1267 if (i != RAW_PART) 1268 total_size += size; 1269 } 1270 } 1271 } 1272 } 1273 1274 /* Find out the total free space, excluding the boot block area. */ 1275 base_offset = BBSIZE / secsize; 1276 free_space = 0; 1277 for (i = 0; i < lp->d_npartitions; i++) { 1278 pp = &lp->d_partitions[i]; 1279 if (!part_set[i] || i == RAW_PART || 1280 part_size_type[i] == '%' || part_size_type[i] == '*') 1281 continue; 1282 if (pp->p_offset > base_offset) 1283 free_space += pp->p_offset - base_offset; 1284 if (pp->p_offset + pp->p_size > base_offset) 1285 base_offset = pp->p_offset + pp->p_size; 1286 } 1287 if (base_offset < lp->d_secperunit) 1288 free_space += lp->d_secperunit - base_offset; 1289 1290 /* handle % partitions - note %'s don't need to add up to 100! */ 1291 if (total_percent != 0) { 1292 if (total_percent > 100) { 1293 fprintf(stderr,"total percentage %lu is greater than 100\n", 1294 total_percent); 1295 errors++; 1296 } 1297 1298 if (free_space > 0) { 1299 for (i = 0; i < lp->d_npartitions; i++) { 1300 pp = &lp->d_partitions[i]; 1301 if (part_set[i] && part_size_type[i] == '%') { 1302 /* careful of overflows! and integer roundoff */ 1303 pp->p_size = ((double)pp->p_size/100) * free_space; 1304 total_size += pp->p_size; 1305 1306 /* FIX we can lose a sector or so due to roundoff per 1307 partition. A more complex algorithm could avoid that */ 1308 } 1309 } 1310 } else { 1311 fprintf(stderr, 1312 "%ld sectors available to give to '*' and '%%' partitions\n", 1313 free_space); 1314 errors++; 1315 /* fix? set all % partitions to size 0? */ 1316 } 1317 } 1318 /* give anything remaining to the hog partition */ 1319 if (hog_part != -1) { 1320 /* 1321 * Find the range of offsets usable by '*' partitions around 1322 * the hog partition and how much space they need. 1323 */ 1324 needed = 0; 1325 base_offset = BBSIZE / secsize; 1326 for (i = hog_part - 1; i >= 0; i--) { 1327 pp = &lp->d_partitions[i]; 1328 if (!part_set[i] || i == RAW_PART) 1329 continue; 1330 if (part_offset_type[i] == '*') { 1331 needed += pp->p_size; 1332 continue; 1333 } 1334 base_offset = pp->p_offset + pp->p_size; 1335 break; 1336 } 1337 current_offset = lp->d_secperunit; 1338 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1339 pp = &lp->d_partitions[i]; 1340 if (!part_set[i] || i == RAW_PART) 1341 continue; 1342 if (part_offset_type[i] == '*') { 1343 needed += pp->p_size; 1344 continue; 1345 } 1346 current_offset = pp->p_offset; 1347 } 1348 1349 if (current_offset - base_offset <= needed) { 1350 fprintf(stderr, "Cannot find space for partition %c\n", 1351 hog_part + 'a'); 1352 fprintf(stderr, 1353 "Need more than %lu sectors between %lu and %lu\n", 1354 needed, base_offset, current_offset); 1355 errors++; 1356 lp->d_partitions[hog_part].p_size = 0; 1357 } else { 1358 lp->d_partitions[hog_part].p_size = current_offset - 1359 base_offset - needed; 1360 total_size += lp->d_partitions[hog_part].p_size; 1361 } 1362 } 1363 1364 /* Now set the offsets for each partition */ 1365 current_offset = BBSIZE / secsize; /* in sectors */ 1366 seen_default_offset = 0; 1367 for (i = 0; i < lp->d_npartitions; i++) { 1368 part = 'a' + i; 1369 pp = &lp->d_partitions[i]; 1370 if (part_set[i]) { 1371 if (part_offset_type[i] == '*') { 1372 if (i == RAW_PART) { 1373 pp->p_offset = 0; 1374 } else { 1375 pp->p_offset = current_offset; 1376 seen_default_offset = 1; 1377 } 1378 } else { 1379 /* allow them to be out of order for old-style tables */ 1380 if (pp->p_offset < current_offset && 1381 seen_default_offset && i != RAW_PART && 1382 pp->p_fstype != FS_VINUM) { 1383 fprintf(stderr, 1384 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1385 (long)pp->p_offset,i+'a',current_offset); 1386 fprintf(stderr, 1387 "Labels with any *'s for offset must be in ascending order by sector\n"); 1388 errors++; 1389 } else if (pp->p_offset != current_offset && 1390 i != RAW_PART && seen_default_offset) { 1391 /* 1392 * this may give unneeded warnings if 1393 * partitions are out-of-order 1394 */ 1395 warnx( 1396 "Offset %ld for partition %c doesn't match expected value %ld", 1397 (long)pp->p_offset, i + 'a', current_offset); 1398 } 1399 } 1400 if (i != RAW_PART) 1401 current_offset = pp->p_offset + pp->p_size; 1402 } 1403 } 1404 1405 for (i = 0; i < lp->d_npartitions; i++) { 1406 part = 'a' + i; 1407 pp = &lp->d_partitions[i]; 1408 if (pp->p_size == 0 && pp->p_offset != 0) 1409 warnx("partition %c: size 0, but offset %lu", 1410 part, (u_long)pp->p_offset); 1411 #ifdef notdef 1412 if (pp->p_size % lp->d_secpercyl) 1413 warnx("partition %c: size %% cylinder-size != 0", 1414 part); 1415 if (pp->p_offset % lp->d_secpercyl) 1416 warnx("partition %c: offset %% cylinder-size != 0", 1417 part); 1418 #endif 1419 if (pp->p_offset > lp->d_secperunit) { 1420 fprintf(stderr, 1421 "partition %c: offset past end of unit\n", part); 1422 errors++; 1423 } 1424 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1425 fprintf(stderr, 1426 "partition %c: partition extends past end of unit\n", 1427 part); 1428 errors++; 1429 } 1430 if (i == RAW_PART) { 1431 if (pp->p_fstype != FS_UNUSED) 1432 warnx("partition %c is not marked as unused!",part); 1433 if (pp->p_offset != 0) 1434 warnx("partition %c doesn't start at 0!",part); 1435 if (pp->p_size != lp->d_secperunit) 1436 warnx("partition %c doesn't cover the whole unit!",part); 1437 1438 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1439 (pp->p_size != lp->d_secperunit)) { 1440 warnx("An incorrect partition %c may cause problems for " 1441 "standard system utilities",part); 1442 } 1443 } 1444 1445 /* check for overlaps */ 1446 /* this will check for all possible overlaps once and only once */ 1447 for (j = 0; j < i; j++) { 1448 pp2 = &lp->d_partitions[j]; 1449 if (j != RAW_PART && i != RAW_PART && 1450 pp->p_fstype != FS_VINUM && 1451 pp2->p_fstype != FS_VINUM && 1452 part_set[i] && part_set[j]) { 1453 if (pp2->p_offset < pp->p_offset + pp->p_size && 1454 (pp2->p_offset + pp2->p_size > pp->p_offset || 1455 pp2->p_offset >= pp->p_offset)) { 1456 fprintf(stderr,"partitions %c and %c overlap!\n", 1457 j + 'a', i + 'a'); 1458 errors++; 1459 } 1460 } 1461 } 1462 } 1463 for (; i < lp->d_npartitions; i++) { 1464 part = 'a' + i; 1465 pp = &lp->d_partitions[i]; 1466 if (pp->p_size || pp->p_offset) 1467 warnx("unused partition %c: size %d offset %lu", 1468 'a' + i, pp->p_size, (u_long)pp->p_offset); 1469 } 1470 return (errors); 1471 } 1472 1473 /* 1474 * When operating on a "virgin" disk, try getting an initial label 1475 * from the associated device driver. This might work for all device 1476 * drivers that are able to fetch some initial device parameters 1477 * without even having access to a (BSD) disklabel, like SCSI disks, 1478 * most IDE drives, or vn devices. 1479 * 1480 * The device name must be given in its "canonical" form. 1481 */ 1482 static struct disklabel * 1483 getvirginlabel(void) 1484 { 1485 static struct disklabel loclab; 1486 struct partition *dp; 1487 int f; 1488 u_int u; 1489 1490 if ((f = open(specname, O_RDONLY)) == -1) { 1491 warn("cannot open %s", specname); 1492 return (NULL); 1493 } 1494 1495 if (is_file) 1496 get_file_parms(f); 1497 else { 1498 mediasize = g_mediasize(f); 1499 secsize = g_sectorsize(f); 1500 if (secsize < 0 || mediasize < 0) { 1501 close (f); 1502 return (NULL); 1503 } 1504 } 1505 memset(&loclab, 0, sizeof loclab); 1506 loclab.d_magic = DISKMAGIC; 1507 loclab.d_magic2 = DISKMAGIC; 1508 loclab.d_secsize = secsize; 1509 loclab.d_secperunit = mediasize / secsize; 1510 1511 /* 1512 * Nobody in these enligthened days uses the CHS geometry for 1513 * anything, but nontheless try to get it right. If we fail 1514 * to get any good ideas from the device, construct something 1515 * which is IBM-PC friendly. 1516 */ 1517 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1518 loclab.d_nsectors = u; 1519 else 1520 loclab.d_nsectors = 63; 1521 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1522 loclab.d_ntracks = u; 1523 else if (loclab.d_secperunit <= 63*1*1024) 1524 loclab.d_ntracks = 1; 1525 else if (loclab.d_secperunit <= 63*16*1024) 1526 loclab.d_ntracks = 16; 1527 else 1528 loclab.d_ntracks = 255; 1529 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1530 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1531 loclab.d_npartitions = DEFPARTITIONS; 1532 1533 /* Various (unneeded) compat stuff */ 1534 loclab.d_rpm = 3600; 1535 loclab.d_bbsize = BBSIZE; 1536 loclab.d_interleave = 1; 1537 strncpy(loclab.d_typename, "amnesiac", 1538 sizeof(loclab.d_typename)); 1539 1540 dp = &loclab.d_partitions[RAW_PART]; 1541 dp->p_size = loclab.d_secperunit; 1542 loclab.d_checksum = dkcksum(&loclab); 1543 close (f); 1544 return (&loclab); 1545 } 1546 1547 static void 1548 usage(void) 1549 { 1550 1551 fprintf(stderr, 1552 "%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", 1553 "usage: bsdlabel disk", 1554 "\t\t(to read label)", 1555 " bsdlabel -w [-n] [-m machine] disk [type]", 1556 "\t\t(to write label with existing boot program)", 1557 " bsdlabel -e [-n] [-m machine] disk", 1558 "\t\t(to edit label)", 1559 " bsdlabel -R [-n] [-m machine] disk protofile", 1560 "\t\t(to restore label with existing boot program)", 1561 " bsdlabel -B [-b boot] [-m machine] disk", 1562 "\t\t(to install boot program with existing on-disk label)", 1563 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1564 "\t\t(to write label and install boot program)", 1565 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1566 "\t\t(to restore label and install boot program)" 1567 ); 1568 exit(1); 1569 } 1570