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 close(fd); 374 return; 375 } else if ((!alphacksum) && st.st_size <= BBSIZE) { 376 if (read(fd, bootarea, st.st_size) != st.st_size) 377 err(1, "read error %s", xxboot); 378 close(fd); 379 return; 380 } 381 errx(1, "boot code %s is wrong size", xxboot); 382 } 383 384 static int 385 geom_bsd_available(void) 386 { 387 struct gclass *class; 388 struct gmesh mesh; 389 int error; 390 391 error = geom_gettree(&mesh); 392 if (error != 0) 393 errc(1, error, "Cannot get GEOM tree"); 394 395 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 396 if (strcmp(class->lg_name, "BSD") == 0) { 397 geom_deletetree(&mesh); 398 return (1); 399 } 400 } 401 402 geom_deletetree(&mesh); 403 404 return (0); 405 } 406 407 static int 408 writelabel(void) 409 { 410 uint64_t *p, sum; 411 int i, fd, serrno; 412 struct gctl_req *grq; 413 char const *errstr; 414 struct disklabel *lp = &lab; 415 416 if (disable_write) { 417 warnx("write to disk label supressed - label was as follows:"); 418 display(stdout, NULL); 419 return (0); 420 } 421 422 lp->d_magic = DISKMAGIC; 423 lp->d_magic2 = DISKMAGIC; 424 lp->d_checksum = 0; 425 lp->d_checksum = dkcksum(lp); 426 if (installboot) 427 readboot(); 428 for (i = 0; i < lab.d_npartitions; i++) 429 if (lab.d_partitions[i].p_size) 430 lab.d_partitions[i].p_offset += lba_offset; 431 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 432 lp); 433 if (alphacksum) { 434 /* Generate the bootblock checksum for the SRM console. */ 435 for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++) 436 sum += p[i]; 437 p[63] = sum; 438 } 439 440 fd = open(specname, O_RDWR); 441 if (fd < 0) { 442 if (is_file) { 443 warn("cannot open file %s for writing label", specname); 444 return(1); 445 } else 446 serrno = errno; 447 448 /* Give up if GEOM_BSD is not available. */ 449 if (geom_bsd_available() == 0) { 450 warnc(serrno, "%s", specname); 451 return (1); 452 } 453 454 grq = gctl_get_handle(); 455 gctl_ro_param(grq, "verb", -1, "write label"); 456 gctl_ro_param(grq, "class", -1, "BSD"); 457 gctl_ro_param(grq, "geom", -1, pname); 458 gctl_ro_param(grq, "label", 148+16*8, 459 bootarea + labeloffset + labelsoffset * secsize); 460 errstr = gctl_issue(grq); 461 if (errstr != NULL) { 462 warnx("%s", errstr); 463 gctl_free(grq); 464 return(1); 465 } 466 gctl_free(grq); 467 if (installboot) { 468 grq = gctl_get_handle(); 469 gctl_ro_param(grq, "verb", -1, "write bootcode"); 470 gctl_ro_param(grq, "class", -1, "BSD"); 471 gctl_ro_param(grq, "geom", -1, pname); 472 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 473 errstr = gctl_issue(grq); 474 if (errstr != NULL) { 475 warnx("%s", errstr); 476 gctl_free(grq); 477 return (1); 478 } 479 gctl_free(grq); 480 } 481 } else { 482 if (write(fd, bootarea, bbsize) != bbsize) { 483 warn("write %s", specname); 484 close (fd); 485 return (1); 486 } 487 close (fd); 488 } 489 return (0); 490 } 491 492 static void 493 get_file_parms(int f) 494 { 495 int i; 496 struct stat sb; 497 498 if (fstat(f, &sb) != 0) 499 err(4, "fstat failed"); 500 i = sb.st_mode & S_IFMT; 501 if (i != S_IFREG && i != S_IFLNK) 502 errx(4, "%s is not a valid file or link", specname); 503 secsize = DEV_BSIZE; 504 mediasize = sb.st_size; 505 } 506 507 /* 508 * Fetch disklabel for disk. 509 */ 510 static int 511 readlabel(int flag) 512 { 513 ssize_t nbytes; 514 uint32_t lba; 515 int f, i; 516 int error; 517 518 f = open(specname, O_RDONLY); 519 if (f < 0) 520 err(1, "%s", specname); 521 if (is_file) 522 get_file_parms(f); 523 else { 524 mediasize = g_mediasize(f); 525 secsize = g_sectorsize(f); 526 if (secsize < 0 || mediasize < 0) 527 err(4, "cannot get disk geometry"); 528 } 529 if (mediasize > (off_t)0xffffffff * secsize) 530 errx(1, 531 "disks with more than 2^32-1 sectors are not supported"); 532 (void)lseek(f, (off_t)0, SEEK_SET); 533 nbytes = read(f, bootarea, BBSIZE); 534 if (nbytes == -1) 535 err(4, "%s read", specname); 536 if (nbytes != BBSIZE) 537 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 538 close (f); 539 error = bsd_disklabel_le_dec( 540 bootarea + (labeloffset + labelsoffset * secsize), 541 &lab, MAXPARTITIONS); 542 if (flag && error) 543 errx(1, "%s: no valid label found", specname); 544 545 if (is_file) 546 return(0); 547 548 /* 549 * Compensate for absolute block addressing by finding the 550 * smallest partition offset and if the offset of the 'c' 551 * partition is equal to that, subtract it from all offsets. 552 */ 553 lba = ~0; 554 for (i = 0; i < lab.d_npartitions; i++) { 555 if (lab.d_partitions[i].p_size) 556 lba = MIN(lba, lab.d_partitions[i].p_offset); 557 } 558 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 559 for (i = 0; i < lab.d_npartitions; i++) { 560 if (lab.d_partitions[i].p_size) 561 lab.d_partitions[i].p_offset -= lba; 562 } 563 /* 564 * Save the offset so that we can write the label 565 * back with absolute block addresses. 566 */ 567 lba_offset = lba; 568 } 569 return (error); 570 } 571 572 573 static void 574 display(FILE *f, const struct disklabel *lp) 575 { 576 int i, j; 577 const struct partition *pp; 578 579 if (lp == NULL) 580 lp = &lab; 581 582 fprintf(f, "# %s:\n", specname); 583 if (allfields) { 584 if (lp->d_type < DKMAXTYPES) 585 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 586 else 587 fprintf(f, "type: %u\n", lp->d_type); 588 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 589 lp->d_typename); 590 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 591 lp->d_packname); 592 fprintf(f, "flags:"); 593 if (lp->d_flags & D_REMOVABLE) 594 fprintf(f, " removeable"); 595 if (lp->d_flags & D_ECC) 596 fprintf(f, " ecc"); 597 if (lp->d_flags & D_BADSECT) 598 fprintf(f, " badsect"); 599 fprintf(f, "\n"); 600 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 601 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 602 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 603 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 604 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 605 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 606 fprintf(f, "rpm: %u\n", lp->d_rpm); 607 fprintf(f, "interleave: %u\n", lp->d_interleave); 608 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 609 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 610 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 611 (u_long)lp->d_headswitch); 612 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 613 (u_long)lp->d_trkseek); 614 fprintf(f, "drivedata: "); 615 for (i = NDDATA - 1; i >= 0; i--) 616 if (lp->d_drivedata[i]) 617 break; 618 if (i < 0) 619 i = 0; 620 for (j = 0; j <= i; j++) 621 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 622 fprintf(f, "\n\n"); 623 } 624 fprintf(f, "%u partitions:\n", lp->d_npartitions); 625 fprintf(f, 626 "# size offset fstype [fsize bsize bps/cpg]\n"); 627 pp = lp->d_partitions; 628 for (i = 0; i < lp->d_npartitions; i++, pp++) { 629 if (pp->p_size) { 630 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 631 (u_long)pp->p_size, (u_long)pp->p_offset); 632 if (pp->p_fstype < FSMAXTYPES) 633 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 634 else 635 fprintf(f, "%8d", pp->p_fstype); 636 switch (pp->p_fstype) { 637 638 case FS_UNUSED: /* XXX */ 639 fprintf(f, " %5lu %5lu %5.5s ", 640 (u_long)pp->p_fsize, 641 (u_long)(pp->p_fsize * pp->p_frag), ""); 642 break; 643 644 case FS_BSDFFS: 645 fprintf(f, " %5lu %5lu %5u ", 646 (u_long)pp->p_fsize, 647 (u_long)(pp->p_fsize * pp->p_frag), 648 pp->p_cpg); 649 break; 650 651 case FS_BSDLFS: 652 fprintf(f, " %5lu %5lu %5d", 653 (u_long)pp->p_fsize, 654 (u_long)(pp->p_fsize * pp->p_frag), 655 pp->p_cpg); 656 break; 657 658 default: 659 fprintf(f, "%20.20s", ""); 660 break; 661 } 662 if (i == RAW_PART) { 663 fprintf(f, " # \"raw\" part, don't edit"); 664 } 665 fprintf(f, "\n"); 666 } 667 } 668 fflush(f); 669 } 670 671 static int 672 edit(void) 673 { 674 int c, fd; 675 struct disklabel label; 676 FILE *fp; 677 678 if ((fd = mkstemp(tmpfil)) == -1 || 679 (fp = fdopen(fd, "w")) == NULL) { 680 warnx("can't create %s", tmpfil); 681 return (1); 682 } 683 display(fp, NULL); 684 fclose(fp); 685 for (;;) { 686 if (!editit()) 687 break; 688 fp = fopen(tmpfil, "r"); 689 if (fp == NULL) { 690 warnx("can't reopen %s for reading", tmpfil); 691 break; 692 } 693 bzero((char *)&label, sizeof(label)); 694 c = getasciilabel(fp, &label); 695 fclose(fp); 696 if (c) { 697 lab = label; 698 if (writelabel() == 0) { 699 (void) unlink(tmpfil); 700 return (0); 701 } 702 } 703 printf("re-edit the label? [y]: "); 704 fflush(stdout); 705 c = getchar(); 706 if (c != EOF && c != (int)'\n') 707 while (getchar() != (int)'\n') 708 ; 709 if (c == (int)'n') 710 break; 711 } 712 (void) unlink(tmpfil); 713 return (1); 714 } 715 716 static int 717 editit(void) 718 { 719 int pid, xpid; 720 int locstat, omask; 721 const char *ed; 722 uid_t uid; 723 gid_t gid; 724 725 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 726 while ((pid = fork()) < 0) { 727 if (errno == EPROCLIM) { 728 warnx("you have too many processes"); 729 return(0); 730 } 731 if (errno != EAGAIN) { 732 warn("fork"); 733 return(0); 734 } 735 sleep(1); 736 } 737 if (pid == 0) { 738 sigsetmask(omask); 739 gid = getgid(); 740 if (setresgid(gid, gid, gid) == -1) 741 err(1, "setresgid"); 742 uid = getuid(); 743 if (setresuid(uid, uid, uid) == -1) 744 err(1, "setresuid"); 745 if ((ed = getenv("EDITOR")) == (char *)0) 746 ed = DEFEDITOR; 747 execlp(ed, ed, tmpfil, (char *)0); 748 err(1, "%s", ed); 749 } 750 while ((xpid = wait(&locstat)) >= 0) 751 if (xpid == pid) 752 break; 753 sigsetmask(omask); 754 return(!locstat); 755 } 756 757 static char * 758 skip(char *cp) 759 { 760 761 while (*cp != '\0' && isspace(*cp)) 762 cp++; 763 if (*cp == '\0' || *cp == '#') 764 return (NULL); 765 return (cp); 766 } 767 768 static char * 769 word(char *cp) 770 { 771 char c; 772 773 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 774 cp++; 775 if ((c = *cp) != '\0') { 776 *cp++ = '\0'; 777 if (c != '#') 778 return (skip(cp)); 779 } 780 return (NULL); 781 } 782 783 /* 784 * Read an ascii label in from fd f, 785 * in the same format as that put out by display(), 786 * and fill in lp. 787 */ 788 static int 789 getasciilabel(FILE *f, struct disklabel *lp) 790 { 791 char *cp, *endp; 792 const char **cpp; 793 u_int part; 794 char *tp, line[BUFSIZ]; 795 u_long v; 796 int lineno = 0, errors = 0; 797 int i; 798 799 makelabel("auto", lp); 800 bzero(&part_set, sizeof(part_set)); 801 bzero(&part_size_type, sizeof(part_size_type)); 802 bzero(&part_offset_type, sizeof(part_offset_type)); 803 lp->d_bbsize = BBSIZE; /* XXX */ 804 lp->d_sbsize = 0; /* XXX */ 805 while (fgets(line, sizeof(line) - 1, f)) { 806 lineno++; 807 if ((cp = index(line,'\n')) != 0) 808 *cp = '\0'; 809 cp = skip(line); 810 if (cp == NULL) 811 continue; 812 tp = index(cp, ':'); 813 if (tp == NULL) { 814 fprintf(stderr, "line %d: syntax error\n", lineno); 815 errors++; 816 continue; 817 } 818 *tp++ = '\0', tp = skip(tp); 819 if (!strcmp(cp, "type")) { 820 if (tp == NULL) 821 tp = unknown; 822 cpp = dktypenames; 823 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 824 if (*cpp && !strcmp(*cpp, tp)) { 825 lp->d_type = cpp - dktypenames; 826 break; 827 } 828 if (cpp < &dktypenames[DKMAXTYPES]) 829 continue; 830 errno = 0; 831 v = strtoul(tp, &endp, 10); 832 if (errno != 0 || *endp != '\0') 833 v = DKMAXTYPES; 834 if (v >= DKMAXTYPES) 835 fprintf(stderr, "line %d:%s %lu\n", lineno, 836 "Warning, unknown disk type", v); 837 else 838 lp->d_type = v; 839 continue; 840 } 841 if (!strcmp(cp, "flags")) { 842 for (v = 0; (cp = tp) && *cp != '\0';) { 843 tp = word(cp); 844 if (!strcmp(cp, "removeable")) 845 v |= D_REMOVABLE; 846 else if (!strcmp(cp, "ecc")) 847 v |= D_ECC; 848 else if (!strcmp(cp, "badsect")) 849 v |= D_BADSECT; 850 else { 851 fprintf(stderr, 852 "line %d: %s: bad flag\n", 853 lineno, cp); 854 errors++; 855 } 856 } 857 lp->d_flags = v; 858 continue; 859 } 860 if (!strcmp(cp, "drivedata")) { 861 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 862 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 863 tp = word(cp); 864 } 865 continue; 866 } 867 if (sscanf(cp, "%lu partitions", &v) == 1) { 868 if (v == 0 || v > MAXPARTITIONS) { 869 fprintf(stderr, 870 "line %d: bad # of partitions\n", lineno); 871 lp->d_npartitions = MAXPARTITIONS; 872 errors++; 873 } else 874 lp->d_npartitions = v; 875 continue; 876 } 877 if (tp == NULL) 878 tp = blank; 879 if (!strcmp(cp, "disk")) { 880 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 881 continue; 882 } 883 if (!strcmp(cp, "label")) { 884 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 885 continue; 886 } 887 if (!strcmp(cp, "bytes/sector")) { 888 v = strtoul(tp, NULL, 10); 889 if (v == 0 || (v % DEV_BSIZE) != 0) { 890 fprintf(stderr, 891 "line %d: %s: bad sector size\n", 892 lineno, tp); 893 errors++; 894 } else 895 lp->d_secsize = v; 896 continue; 897 } 898 if (!strcmp(cp, "sectors/track")) { 899 v = strtoul(tp, NULL, 10); 900 #if (ULONG_MAX != 0xffffffffUL) 901 if (v == 0 || v > 0xffffffff) 902 #else 903 if (v == 0) 904 #endif 905 { 906 fprintf(stderr, "line %d: %s: bad %s\n", 907 lineno, tp, cp); 908 errors++; 909 } else 910 lp->d_nsectors = v; 911 continue; 912 } 913 if (!strcmp(cp, "sectors/cylinder")) { 914 v = strtoul(tp, NULL, 10); 915 if (v == 0) { 916 fprintf(stderr, "line %d: %s: bad %s\n", 917 lineno, tp, cp); 918 errors++; 919 } else 920 lp->d_secpercyl = v; 921 continue; 922 } 923 if (!strcmp(cp, "tracks/cylinder")) { 924 v = strtoul(tp, NULL, 10); 925 if (v == 0) { 926 fprintf(stderr, "line %d: %s: bad %s\n", 927 lineno, tp, cp); 928 errors++; 929 } else 930 lp->d_ntracks = v; 931 continue; 932 } 933 if (!strcmp(cp, "cylinders")) { 934 v = strtoul(tp, NULL, 10); 935 if (v == 0) { 936 fprintf(stderr, "line %d: %s: bad %s\n", 937 lineno, tp, cp); 938 errors++; 939 } else 940 lp->d_ncylinders = v; 941 continue; 942 } 943 if (!strcmp(cp, "sectors/unit")) { 944 v = strtoul(tp, NULL, 10); 945 if (v == 0) { 946 fprintf(stderr, "line %d: %s: bad %s\n", 947 lineno, tp, cp); 948 errors++; 949 } else 950 lp->d_secperunit = v; 951 continue; 952 } 953 if (!strcmp(cp, "rpm")) { 954 v = strtoul(tp, NULL, 10); 955 if (v == 0 || v > USHRT_MAX) { 956 fprintf(stderr, "line %d: %s: bad %s\n", 957 lineno, tp, cp); 958 errors++; 959 } else 960 lp->d_rpm = v; 961 continue; 962 } 963 if (!strcmp(cp, "interleave")) { 964 v = strtoul(tp, NULL, 10); 965 if (v == 0 || v > USHRT_MAX) { 966 fprintf(stderr, "line %d: %s: bad %s\n", 967 lineno, tp, cp); 968 errors++; 969 } else 970 lp->d_interleave = v; 971 continue; 972 } 973 if (!strcmp(cp, "trackskew")) { 974 v = strtoul(tp, NULL, 10); 975 if (v > USHRT_MAX) { 976 fprintf(stderr, "line %d: %s: bad %s\n", 977 lineno, tp, cp); 978 errors++; 979 } else 980 lp->d_trackskew = v; 981 continue; 982 } 983 if (!strcmp(cp, "cylinderskew")) { 984 v = strtoul(tp, NULL, 10); 985 if (v > USHRT_MAX) { 986 fprintf(stderr, "line %d: %s: bad %s\n", 987 lineno, tp, cp); 988 errors++; 989 } else 990 lp->d_cylskew = v; 991 continue; 992 } 993 if (!strcmp(cp, "headswitch")) { 994 v = strtoul(tp, NULL, 10); 995 lp->d_headswitch = v; 996 continue; 997 } 998 if (!strcmp(cp, "track-to-track seek")) { 999 v = strtoul(tp, NULL, 10); 1000 lp->d_trkseek = v; 1001 continue; 1002 } 1003 /* the ':' was removed above */ 1004 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 1005 fprintf(stderr, 1006 "line %d: %s: Unknown disklabel field\n", lineno, 1007 cp); 1008 errors++; 1009 continue; 1010 } 1011 1012 /* Process a partition specification line. */ 1013 part = *cp - 'a'; 1014 if (part >= lp->d_npartitions) { 1015 fprintf(stderr, 1016 "line %d: partition name out of range a-%c: %s\n", 1017 lineno, 'a' + lp->d_npartitions - 1, cp); 1018 errors++; 1019 continue; 1020 } 1021 part_set[part] = 1; 1022 1023 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1024 errors++; 1025 break; 1026 } 1027 } 1028 errors += checklabel(lp); 1029 return (errors == 0); 1030 } 1031 1032 #define NXTNUM(n) do { \ 1033 if (tp == NULL) { \ 1034 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1035 return (1); \ 1036 } else { \ 1037 cp = tp, tp = word(cp); \ 1038 (n) = strtoul(cp, NULL, 10); \ 1039 } \ 1040 } while (0) 1041 1042 /* retain 1 character following number */ 1043 #define NXTWORD(w,n) do { \ 1044 if (tp == NULL) { \ 1045 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1046 return (1); \ 1047 } else { \ 1048 char *tmp; \ 1049 cp = tp, tp = word(cp); \ 1050 (n) = strtoul(cp, &tmp, 10); \ 1051 if (tmp) (w) = *tmp; \ 1052 } \ 1053 } while (0) 1054 1055 /* 1056 * Read a partition line into partition `part' in the specified disklabel. 1057 * Return 0 on success, 1 on failure. 1058 */ 1059 static int 1060 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1061 { 1062 struct partition *pp; 1063 char *cp, *endp; 1064 const char **cpp; 1065 u_long v; 1066 1067 pp = &lp->d_partitions[part]; 1068 cp = NULL; 1069 1070 v = 0; 1071 NXTWORD(part_size_type[part],v); 1072 if (v == 0 && part_size_type[part] != '*') { 1073 fprintf(stderr, 1074 "line %d: %s: bad partition size\n", lineno, cp); 1075 return (1); 1076 } 1077 pp->p_size = v; 1078 1079 v = 0; 1080 NXTWORD(part_offset_type[part],v); 1081 if (v == 0 && part_offset_type[part] != '*' && 1082 part_offset_type[part] != '\0') { 1083 fprintf(stderr, 1084 "line %d: %s: bad partition offset\n", lineno, cp); 1085 return (1); 1086 } 1087 pp->p_offset = v; 1088 if (tp == NULL) { 1089 fprintf(stderr, "line %d: missing file system type\n", lineno); 1090 return (1); 1091 } 1092 cp = tp, tp = word(cp); 1093 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1094 if (*cpp && !strcmp(*cpp, cp)) 1095 break; 1096 if (*cpp != NULL) { 1097 pp->p_fstype = cpp - fstypenames; 1098 } else { 1099 if (isdigit(*cp)) { 1100 errno = 0; 1101 v = strtoul(cp, &endp, 10); 1102 if (errno != 0 || *endp != '\0') 1103 v = FSMAXTYPES; 1104 } else 1105 v = FSMAXTYPES; 1106 if (v >= FSMAXTYPES) { 1107 fprintf(stderr, 1108 "line %d: Warning, unknown file system type %s\n", 1109 lineno, cp); 1110 v = FS_UNUSED; 1111 } 1112 pp->p_fstype = v; 1113 } 1114 1115 switch (pp->p_fstype) { 1116 case FS_UNUSED: 1117 case FS_BSDFFS: 1118 case FS_BSDLFS: 1119 /* accept defaults for fsize/frag/cpg */ 1120 if (tp) { 1121 NXTNUM(pp->p_fsize); 1122 if (pp->p_fsize == 0) 1123 break; 1124 NXTNUM(v); 1125 pp->p_frag = v / pp->p_fsize; 1126 if (tp != NULL) 1127 NXTNUM(pp->p_cpg); 1128 } 1129 /* else default to 0's */ 1130 break; 1131 default: 1132 break; 1133 } 1134 return (0); 1135 } 1136 1137 /* 1138 * Check disklabel for errors and fill in 1139 * derived fields according to supplied values. 1140 */ 1141 static int 1142 checklabel(struct disklabel *lp) 1143 { 1144 struct partition *pp; 1145 int i, errors = 0; 1146 char part; 1147 u_long base_offset, needed, total_size, total_percent, current_offset; 1148 long free_space; 1149 int seen_default_offset; 1150 int hog_part; 1151 int j; 1152 struct partition *pp2; 1153 1154 if (lp == NULL) 1155 lp = &lab; 1156 1157 if (allfields) { 1158 1159 if (lp->d_secsize == 0) { 1160 fprintf(stderr, "sector size 0\n"); 1161 return (1); 1162 } 1163 if (lp->d_nsectors == 0) { 1164 fprintf(stderr, "sectors/track 0\n"); 1165 return (1); 1166 } 1167 if (lp->d_ntracks == 0) { 1168 fprintf(stderr, "tracks/cylinder 0\n"); 1169 return (1); 1170 } 1171 if (lp->d_ncylinders == 0) { 1172 fprintf(stderr, "cylinders/unit 0\n"); 1173 errors++; 1174 } 1175 if (lp->d_rpm == 0) 1176 warnx("revolutions/minute 0"); 1177 if (lp->d_secpercyl == 0) 1178 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1179 if (lp->d_secperunit == 0) 1180 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1181 if (lp->d_bbsize == 0) { 1182 fprintf(stderr, "boot block size 0\n"); 1183 errors++; 1184 } else if (lp->d_bbsize % lp->d_secsize) 1185 warnx("boot block size %% sector-size != 0"); 1186 if (lp->d_npartitions > MAXPARTITIONS) 1187 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1188 (u_long)lp->d_npartitions, MAXPARTITIONS); 1189 } else { 1190 struct disklabel *vl; 1191 1192 vl = getvirginlabel(); 1193 lp->d_secsize = vl->d_secsize; 1194 lp->d_nsectors = vl->d_nsectors; 1195 lp->d_ntracks = vl->d_ntracks; 1196 lp->d_ncylinders = vl->d_ncylinders; 1197 lp->d_rpm = vl->d_rpm; 1198 lp->d_interleave = vl->d_interleave; 1199 lp->d_secpercyl = vl->d_secpercyl; 1200 lp->d_secperunit = vl->d_secperunit; 1201 lp->d_bbsize = vl->d_bbsize; 1202 lp->d_npartitions = vl->d_npartitions; 1203 } 1204 1205 1206 /* first allocate space to the partitions, then offsets */ 1207 total_size = 0; /* in sectors */ 1208 total_percent = 0; /* in percent */ 1209 hog_part = -1; 1210 /* find all fixed partitions */ 1211 for (i = 0; i < lp->d_npartitions; i++) { 1212 pp = &lp->d_partitions[i]; 1213 if (part_set[i]) { 1214 if (part_size_type[i] == '*') { 1215 if (i == RAW_PART) { 1216 pp->p_size = lp->d_secperunit; 1217 } else { 1218 if (hog_part != -1) 1219 warnx("Too many '*' partitions (%c and %c)", 1220 hog_part + 'a',i + 'a'); 1221 else 1222 hog_part = i; 1223 } 1224 } else { 1225 off_t size; 1226 1227 size = pp->p_size; 1228 switch (part_size_type[i]) { 1229 case '%': 1230 total_percent += size; 1231 break; 1232 case 't': 1233 case 'T': 1234 size *= 1024ULL; 1235 /* FALLTHROUGH */ 1236 case 'g': 1237 case 'G': 1238 size *= 1024ULL; 1239 /* FALLTHROUGH */ 1240 case 'm': 1241 case 'M': 1242 size *= 1024ULL; 1243 /* FALLTHROUGH */ 1244 case 'k': 1245 case 'K': 1246 size *= 1024ULL; 1247 break; 1248 case '\0': 1249 break; 1250 default: 1251 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1252 part_size_type[i], i + 'a'); 1253 break; 1254 } 1255 /* don't count %'s yet */ 1256 if (part_size_type[i] != '%') { 1257 /* 1258 * for all not in sectors, convert to 1259 * sectors 1260 */ 1261 if (part_size_type[i] != '\0') { 1262 if (size % lp->d_secsize != 0) 1263 warnx("partition %c not an integer number of sectors", 1264 i + 'a'); 1265 size /= lp->d_secsize; 1266 pp->p_size = size; 1267 } 1268 /* else already in sectors */ 1269 if (i != RAW_PART) 1270 total_size += size; 1271 } 1272 } 1273 } 1274 } 1275 1276 /* Find out the total free space, excluding the boot block area. */ 1277 base_offset = BBSIZE / secsize; 1278 free_space = 0; 1279 for (i = 0; i < lp->d_npartitions; i++) { 1280 pp = &lp->d_partitions[i]; 1281 if (!part_set[i] || i == RAW_PART || 1282 part_size_type[i] == '%' || part_size_type[i] == '*') 1283 continue; 1284 if (pp->p_offset > base_offset) 1285 free_space += pp->p_offset - base_offset; 1286 if (pp->p_offset + pp->p_size > base_offset) 1287 base_offset = pp->p_offset + pp->p_size; 1288 } 1289 if (base_offset < lp->d_secperunit) 1290 free_space += lp->d_secperunit - base_offset; 1291 1292 /* handle % partitions - note %'s don't need to add up to 100! */ 1293 if (total_percent != 0) { 1294 if (total_percent > 100) { 1295 fprintf(stderr,"total percentage %lu is greater than 100\n", 1296 total_percent); 1297 errors++; 1298 } 1299 1300 if (free_space > 0) { 1301 for (i = 0; i < lp->d_npartitions; i++) { 1302 pp = &lp->d_partitions[i]; 1303 if (part_set[i] && part_size_type[i] == '%') { 1304 /* careful of overflows! and integer roundoff */ 1305 pp->p_size = ((double)pp->p_size/100) * free_space; 1306 total_size += pp->p_size; 1307 1308 /* FIX we can lose a sector or so due to roundoff per 1309 partition. A more complex algorithm could avoid that */ 1310 } 1311 } 1312 } else { 1313 fprintf(stderr, 1314 "%ld sectors available to give to '*' and '%%' partitions\n", 1315 free_space); 1316 errors++; 1317 /* fix? set all % partitions to size 0? */ 1318 } 1319 } 1320 /* give anything remaining to the hog partition */ 1321 if (hog_part != -1) { 1322 /* 1323 * Find the range of offsets usable by '*' partitions around 1324 * the hog partition and how much space they need. 1325 */ 1326 needed = 0; 1327 base_offset = BBSIZE / secsize; 1328 for (i = hog_part - 1; i >= 0; i--) { 1329 pp = &lp->d_partitions[i]; 1330 if (!part_set[i] || i == RAW_PART) 1331 continue; 1332 if (part_offset_type[i] == '*') { 1333 needed += pp->p_size; 1334 continue; 1335 } 1336 base_offset = pp->p_offset + pp->p_size; 1337 break; 1338 } 1339 current_offset = lp->d_secperunit; 1340 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1341 pp = &lp->d_partitions[i]; 1342 if (!part_set[i] || i == RAW_PART) 1343 continue; 1344 if (part_offset_type[i] == '*') { 1345 needed += pp->p_size; 1346 continue; 1347 } 1348 current_offset = pp->p_offset; 1349 } 1350 1351 if (current_offset - base_offset <= needed) { 1352 fprintf(stderr, "Cannot find space for partition %c\n", 1353 hog_part + 'a'); 1354 fprintf(stderr, 1355 "Need more than %lu sectors between %lu and %lu\n", 1356 needed, base_offset, current_offset); 1357 errors++; 1358 lp->d_partitions[hog_part].p_size = 0; 1359 } else { 1360 lp->d_partitions[hog_part].p_size = current_offset - 1361 base_offset - needed; 1362 total_size += lp->d_partitions[hog_part].p_size; 1363 } 1364 } 1365 1366 /* Now set the offsets for each partition */ 1367 current_offset = BBSIZE / secsize; /* in sectors */ 1368 seen_default_offset = 0; 1369 for (i = 0; i < lp->d_npartitions; i++) { 1370 part = 'a' + i; 1371 pp = &lp->d_partitions[i]; 1372 if (part_set[i]) { 1373 if (part_offset_type[i] == '*') { 1374 if (i == RAW_PART) { 1375 pp->p_offset = 0; 1376 } else { 1377 pp->p_offset = current_offset; 1378 seen_default_offset = 1; 1379 } 1380 } else { 1381 /* allow them to be out of order for old-style tables */ 1382 if (pp->p_offset < current_offset && 1383 seen_default_offset && i != RAW_PART && 1384 pp->p_fstype != FS_VINUM) { 1385 fprintf(stderr, 1386 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1387 (long)pp->p_offset,i+'a',current_offset); 1388 fprintf(stderr, 1389 "Labels with any *'s for offset must be in ascending order by sector\n"); 1390 errors++; 1391 } else if (pp->p_offset != current_offset && 1392 i != RAW_PART && seen_default_offset) { 1393 /* 1394 * this may give unneeded warnings if 1395 * partitions are out-of-order 1396 */ 1397 warnx( 1398 "Offset %ld for partition %c doesn't match expected value %ld", 1399 (long)pp->p_offset, i + 'a', current_offset); 1400 } 1401 } 1402 if (i != RAW_PART) 1403 current_offset = pp->p_offset + pp->p_size; 1404 } 1405 } 1406 1407 for (i = 0; i < lp->d_npartitions; i++) { 1408 part = 'a' + i; 1409 pp = &lp->d_partitions[i]; 1410 if (pp->p_size == 0 && pp->p_offset != 0) 1411 warnx("partition %c: size 0, but offset %lu", 1412 part, (u_long)pp->p_offset); 1413 #ifdef notdef 1414 if (pp->p_size % lp->d_secpercyl) 1415 warnx("partition %c: size %% cylinder-size != 0", 1416 part); 1417 if (pp->p_offset % lp->d_secpercyl) 1418 warnx("partition %c: offset %% cylinder-size != 0", 1419 part); 1420 #endif 1421 if (pp->p_offset > lp->d_secperunit) { 1422 fprintf(stderr, 1423 "partition %c: offset past end of unit\n", part); 1424 errors++; 1425 } 1426 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1427 fprintf(stderr, 1428 "partition %c: partition extends past end of unit\n", 1429 part); 1430 errors++; 1431 } 1432 if (i == RAW_PART) { 1433 if (pp->p_fstype != FS_UNUSED) 1434 warnx("partition %c is not marked as unused!",part); 1435 if (pp->p_offset != 0) 1436 warnx("partition %c doesn't start at 0!",part); 1437 if (pp->p_size != lp->d_secperunit) 1438 warnx("partition %c doesn't cover the whole unit!",part); 1439 1440 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1441 (pp->p_size != lp->d_secperunit)) { 1442 warnx("An incorrect partition %c may cause problems for " 1443 "standard system utilities",part); 1444 } 1445 } 1446 1447 /* check for overlaps */ 1448 /* this will check for all possible overlaps once and only once */ 1449 for (j = 0; j < i; j++) { 1450 pp2 = &lp->d_partitions[j]; 1451 if (j != RAW_PART && i != RAW_PART && 1452 pp->p_fstype != FS_VINUM && 1453 pp2->p_fstype != FS_VINUM && 1454 part_set[i] && part_set[j]) { 1455 if (pp2->p_offset < pp->p_offset + pp->p_size && 1456 (pp2->p_offset + pp2->p_size > pp->p_offset || 1457 pp2->p_offset >= pp->p_offset)) { 1458 fprintf(stderr,"partitions %c and %c overlap!\n", 1459 j + 'a', i + 'a'); 1460 errors++; 1461 } 1462 } 1463 } 1464 } 1465 for (; i < lp->d_npartitions; i++) { 1466 part = 'a' + i; 1467 pp = &lp->d_partitions[i]; 1468 if (pp->p_size || pp->p_offset) 1469 warnx("unused partition %c: size %d offset %lu", 1470 'a' + i, pp->p_size, (u_long)pp->p_offset); 1471 } 1472 return (errors); 1473 } 1474 1475 /* 1476 * When operating on a "virgin" disk, try getting an initial label 1477 * from the associated device driver. This might work for all device 1478 * drivers that are able to fetch some initial device parameters 1479 * without even having access to a (BSD) disklabel, like SCSI disks, 1480 * most IDE drives, or vn devices. 1481 * 1482 * The device name must be given in its "canonical" form. 1483 */ 1484 static struct disklabel * 1485 getvirginlabel(void) 1486 { 1487 static struct disklabel loclab; 1488 struct partition *dp; 1489 int f; 1490 u_int u; 1491 1492 if ((f = open(specname, O_RDONLY)) == -1) { 1493 warn("cannot open %s", specname); 1494 return (NULL); 1495 } 1496 1497 if (is_file) 1498 get_file_parms(f); 1499 else { 1500 mediasize = g_mediasize(f); 1501 secsize = g_sectorsize(f); 1502 if (secsize < 0 || mediasize < 0) { 1503 close (f); 1504 return (NULL); 1505 } 1506 } 1507 memset(&loclab, 0, sizeof loclab); 1508 loclab.d_magic = DISKMAGIC; 1509 loclab.d_magic2 = DISKMAGIC; 1510 loclab.d_secsize = secsize; 1511 loclab.d_secperunit = mediasize / secsize; 1512 1513 /* 1514 * Nobody in these enligthened days uses the CHS geometry for 1515 * anything, but nontheless try to get it right. If we fail 1516 * to get any good ideas from the device, construct something 1517 * which is IBM-PC friendly. 1518 */ 1519 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1520 loclab.d_nsectors = u; 1521 else 1522 loclab.d_nsectors = 63; 1523 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1524 loclab.d_ntracks = u; 1525 else if (loclab.d_secperunit <= 63*1*1024) 1526 loclab.d_ntracks = 1; 1527 else if (loclab.d_secperunit <= 63*16*1024) 1528 loclab.d_ntracks = 16; 1529 else 1530 loclab.d_ntracks = 255; 1531 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1532 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1533 loclab.d_npartitions = DEFPARTITIONS; 1534 1535 /* Various (unneeded) compat stuff */ 1536 loclab.d_rpm = 3600; 1537 loclab.d_bbsize = BBSIZE; 1538 loclab.d_interleave = 1; 1539 strncpy(loclab.d_typename, "amnesiac", 1540 sizeof(loclab.d_typename)); 1541 1542 dp = &loclab.d_partitions[RAW_PART]; 1543 dp->p_size = loclab.d_secperunit; 1544 loclab.d_checksum = dkcksum(&loclab); 1545 close (f); 1546 return (&loclab); 1547 } 1548 1549 static void 1550 usage(void) 1551 { 1552 1553 fprintf(stderr, 1554 "%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", 1555 "usage: bsdlabel disk", 1556 "\t\t(to read label)", 1557 " bsdlabel -w [-n] [-m machine] disk [type]", 1558 "\t\t(to write label with existing boot program)", 1559 " bsdlabel -e [-n] [-m machine] disk", 1560 "\t\t(to edit label)", 1561 " bsdlabel -R [-n] [-m machine] disk protofile", 1562 "\t\t(to restore label with existing boot program)", 1563 " bsdlabel -B [-b boot] [-m machine] disk", 1564 "\t\t(to install boot program with existing on-disk label)", 1565 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1566 "\t\t(to write label and install boot program)", 1567 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1568 "\t\t(to restore label and install boot program)" 1569 ); 1570 exit(1); 1571 } 1572