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 20 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_class_available(const char *); 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 static 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 labelsoffset = 1; 169 labeloffset = 0; 170 bbsize = 8192; 171 } else { 172 errx(1, "Unsupported architecture"); 173 } 174 break; 175 case 'n': 176 disable_write = 1; 177 break; 178 case 'R': 179 if (op != UNSPEC) 180 usage(); 181 op = RESTORE; 182 break; 183 case 'e': 184 if (op != UNSPEC) 185 usage(); 186 op = EDIT; 187 break; 188 case 'r': 189 /* 190 * We accept and ignore -r for compatibility with 191 * historical disklabel usage. 192 */ 193 break; 194 case 'w': 195 if (op != UNSPEC) 196 usage(); 197 op = WRITE; 198 break; 199 case '?': 200 default: 201 usage(); 202 } 203 argc -= optind; 204 argv += optind; 205 206 if (argc < 1) 207 usage(); 208 if (labelsoffset < 0 || labeloffset < 0) 209 errx(1, "a -m <architecture> option must be specified"); 210 211 /* Figure out the names of the thing we're working on */ 212 if (is_file) { 213 specname = argv[0]; 214 } else { 215 specname = g_device_path(argv[0]); 216 if (specname == NULL) { 217 warn("unable to get correct path for %s", argv[0]); 218 return(1); 219 } 220 fd = open(specname, O_RDONLY); 221 if (fd < 0) { 222 warn("error opening %s", specname); 223 return(1); 224 } 225 pname = g_providername(fd); 226 if (pname == NULL) { 227 warn("error getting providername for %s", specname); 228 close(fd); 229 return(1); 230 } 231 close(fd); 232 } 233 234 if (installboot && op == UNSPEC) 235 op = WRITEBOOT; 236 else if (op == UNSPEC) 237 op = READ; 238 239 switch(op) { 240 241 case UNSPEC: 242 break; 243 244 case EDIT: 245 if (argc != 1) 246 usage(); 247 readlabel(1); 248 fixlabel(&lab); 249 error = edit(); 250 break; 251 252 case READ: 253 if (argc != 1) 254 usage(); 255 readlabel(1); 256 display(stdout, NULL); 257 error = checklabel(NULL); 258 break; 259 260 case RESTORE: 261 if (argc != 2) 262 usage(); 263 if (!(t = fopen(argv[1], "r"))) 264 err(4, "fopen %s", argv[1]); 265 readlabel(0); 266 if (!getasciilabel(t, &lab)) 267 exit(1); 268 error = writelabel(); 269 break; 270 271 case WRITE: 272 if (argc == 2) 273 name = argv[1]; 274 else if (argc == 1) 275 name = "auto"; 276 else 277 usage(); 278 readlabel(0); 279 makelabel(name, &lab); 280 fixlabel(&lab); 281 if (checklabel(NULL) == 0) 282 error = writelabel(); 283 break; 284 285 case WRITEBOOT: 286 287 readlabel(1); 288 fixlabel(&lab); 289 if (argc == 2) 290 makelabel(argv[1], &lab); 291 if (checklabel(NULL) == 0) 292 error = writelabel(); 293 break; 294 } 295 exit(error); 296 } 297 298 static void 299 fixlabel(struct disklabel *lp) 300 { 301 struct partition *dp; 302 int i; 303 304 for (i = 0; i < lp->d_npartitions; i++) { 305 if (i == RAW_PART) 306 continue; 307 if (lp->d_partitions[i].p_size) 308 return; 309 } 310 311 dp = &lp->d_partitions[0]; 312 dp->p_offset = BBSIZE / secsize; 313 dp->p_size = lp->d_secperunit - dp->p_offset; 314 } 315 316 /* 317 * Construct a prototype disklabel from /etc/disktab. 318 */ 319 static void 320 makelabel(const char *type, struct disklabel *lp) 321 { 322 struct disklabel *dp; 323 324 if (strcmp(type, "auto") == 0) 325 dp = getvirginlabel(); 326 else 327 dp = getdiskbyname(type); 328 if (dp == NULL) 329 errx(1, "%s: unknown disk type", type); 330 *lp = *dp; 331 bzero(lp->d_packname, sizeof(lp->d_packname)); 332 } 333 334 static void 335 readboot(void) 336 { 337 int fd; 338 struct stat st; 339 340 if (xxboot == NULL) 341 xxboot = "/boot/boot"; 342 fd = open(xxboot, O_RDONLY); 343 if (fd < 0) 344 err(1, "cannot open %s", xxboot); 345 fstat(fd, &st); 346 if (st.st_size <= BBSIZE) { 347 if (read(fd, bootarea, st.st_size) != st.st_size) 348 err(1, "read error %s", xxboot); 349 close(fd); 350 return; 351 } 352 errx(1, "boot code %s is wrong size", xxboot); 353 } 354 355 static int 356 geom_class_available(const char *name) 357 { 358 struct gclass *class; 359 struct gmesh mesh; 360 int error; 361 362 error = geom_gettree(&mesh); 363 if (error != 0) 364 errc(1, error, "Cannot get GEOM tree"); 365 366 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 367 if (strcmp(class->lg_name, name) == 0) { 368 geom_deletetree(&mesh); 369 return (1); 370 } 371 } 372 373 geom_deletetree(&mesh); 374 375 return (0); 376 } 377 378 static int 379 writelabel(void) 380 { 381 int i, fd, serrno; 382 struct gctl_req *grq; 383 char const *errstr; 384 struct disklabel *lp = &lab; 385 386 if (disable_write) { 387 warnx("write to disk label suppressed - label was as follows:"); 388 display(stdout, NULL); 389 return (0); 390 } 391 392 lp->d_magic = DISKMAGIC; 393 lp->d_magic2 = DISKMAGIC; 394 lp->d_checksum = 0; 395 lp->d_checksum = dkcksum(lp); 396 if (installboot) 397 readboot(); 398 for (i = 0; i < lab.d_npartitions; i++) 399 if (lab.d_partitions[i].p_size) 400 lab.d_partitions[i].p_offset += lba_offset; 401 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize, 402 lp); 403 404 fd = open(specname, O_RDWR); 405 if (fd < 0) { 406 if (is_file) { 407 warn("cannot open file %s for writing label", specname); 408 return(1); 409 } else 410 serrno = errno; 411 412 if (geom_class_available("PART") != 0) { 413 /* 414 * Since we weren't able open provider for 415 * writing, then recommend user to use gpart(8). 416 */ 417 warnc(serrno, 418 "cannot open provider %s for writing label", 419 specname); 420 warnx("Try to use gpart(8)."); 421 return (1); 422 } 423 424 /* Give up if GEOM_BSD is not available. */ 425 if (geom_class_available("BSD") == 0) { 426 warnc(serrno, "%s", specname); 427 return (1); 428 } 429 430 grq = gctl_get_handle(); 431 gctl_ro_param(grq, "verb", -1, "write label"); 432 gctl_ro_param(grq, "class", -1, "BSD"); 433 gctl_ro_param(grq, "geom", -1, pname); 434 gctl_ro_param(grq, "label", 148+16*8, 435 bootarea + labeloffset + labelsoffset * lab.d_secsize); 436 errstr = gctl_issue(grq); 437 if (errstr != NULL) { 438 warnx("%s", errstr); 439 gctl_free(grq); 440 return(1); 441 } 442 gctl_free(grq); 443 if (installboot) { 444 grq = gctl_get_handle(); 445 gctl_ro_param(grq, "verb", -1, "write bootcode"); 446 gctl_ro_param(grq, "class", -1, "BSD"); 447 gctl_ro_param(grq, "geom", -1, pname); 448 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 449 errstr = gctl_issue(grq); 450 if (errstr != NULL) { 451 warnx("%s", errstr); 452 gctl_free(grq); 453 return (1); 454 } 455 gctl_free(grq); 456 } 457 } else { 458 if (write(fd, bootarea, bbsize) != bbsize) { 459 warn("write %s", specname); 460 close (fd); 461 return (1); 462 } 463 close (fd); 464 } 465 return (0); 466 } 467 468 static void 469 get_file_parms(int f) 470 { 471 int i; 472 struct stat sb; 473 474 if (fstat(f, &sb) != 0) 475 err(4, "fstat failed"); 476 i = sb.st_mode & S_IFMT; 477 if (i != S_IFREG && i != S_IFLNK) 478 errx(4, "%s is not a valid file or link", specname); 479 secsize = DEV_BSIZE; 480 mediasize = sb.st_size; 481 } 482 483 /* 484 * Fetch disklabel for disk. 485 */ 486 static int 487 readlabel(int flag) 488 { 489 ssize_t nbytes; 490 uint32_t lba; 491 int f, i; 492 int error; 493 494 f = open(specname, O_RDONLY); 495 if (f < 0) 496 err(1, "%s", specname); 497 if (is_file) 498 get_file_parms(f); 499 else { 500 mediasize = g_mediasize(f); 501 secsize = g_sectorsize(f); 502 if (secsize < 0 || mediasize < 0) 503 err(4, "cannot get disk geometry"); 504 } 505 if (mediasize > (off_t)0xffffffff * secsize) 506 errx(1, 507 "disks with more than 2^32-1 sectors are not supported"); 508 (void)lseek(f, (off_t)0, SEEK_SET); 509 nbytes = read(f, bootarea, BBSIZE); 510 if (nbytes == -1) 511 err(4, "%s read", specname); 512 if (nbytes != BBSIZE) 513 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 514 close (f); 515 error = bsd_disklabel_le_dec( 516 bootarea + (labeloffset + labelsoffset * secsize), 517 &lab, MAXPARTITIONS); 518 if (flag && error) 519 errx(1, "%s: no valid label found", specname); 520 521 if (is_file) 522 return(0); 523 524 /* 525 * Compensate for absolute block addressing by finding the 526 * smallest partition offset and if the offset of the 'c' 527 * partition is equal to that, subtract it from all offsets. 528 */ 529 lba = ~0; 530 for (i = 0; i < lab.d_npartitions; i++) { 531 if (lab.d_partitions[i].p_size) 532 lba = MIN(lba, lab.d_partitions[i].p_offset); 533 } 534 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 535 for (i = 0; i < lab.d_npartitions; i++) { 536 if (lab.d_partitions[i].p_size) 537 lab.d_partitions[i].p_offset -= lba; 538 } 539 /* 540 * Save the offset so that we can write the label 541 * back with absolute block addresses. 542 */ 543 lba_offset = lba; 544 } 545 return (error); 546 } 547 548 549 static void 550 display(FILE *f, const struct disklabel *lp) 551 { 552 int i, j; 553 const struct partition *pp; 554 555 if (lp == NULL) 556 lp = &lab; 557 558 fprintf(f, "# %s:\n", specname); 559 if (allfields) { 560 if (lp->d_type < DKMAXTYPES) 561 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 562 else 563 fprintf(f, "type: %u\n", lp->d_type); 564 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 565 lp->d_typename); 566 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 567 lp->d_packname); 568 fprintf(f, "flags:"); 569 if (lp->d_flags & D_REMOVABLE) 570 fprintf(f, " removeable"); 571 if (lp->d_flags & D_ECC) 572 fprintf(f, " ecc"); 573 if (lp->d_flags & D_BADSECT) 574 fprintf(f, " badsect"); 575 fprintf(f, "\n"); 576 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 577 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 578 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 579 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 580 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 581 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 582 fprintf(f, "rpm: %u\n", lp->d_rpm); 583 fprintf(f, "interleave: %u\n", lp->d_interleave); 584 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 585 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 586 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 587 (u_long)lp->d_headswitch); 588 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 589 (u_long)lp->d_trkseek); 590 fprintf(f, "drivedata: "); 591 for (i = NDDATA - 1; i >= 0; i--) 592 if (lp->d_drivedata[i]) 593 break; 594 if (i < 0) 595 i = 0; 596 for (j = 0; j <= i; j++) 597 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 598 fprintf(f, "\n\n"); 599 } 600 fprintf(f, "%u partitions:\n", lp->d_npartitions); 601 fprintf(f, 602 "# size offset fstype [fsize bsize bps/cpg]\n"); 603 pp = lp->d_partitions; 604 for (i = 0; i < lp->d_npartitions; i++, pp++) { 605 if (pp->p_size) { 606 fprintf(f, " %c: %10lu %10lu ", 'a' + i, 607 (u_long)pp->p_size, (u_long)pp->p_offset); 608 if (pp->p_fstype < FSMAXTYPES) 609 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 610 else 611 fprintf(f, "%8d", pp->p_fstype); 612 switch (pp->p_fstype) { 613 614 case FS_UNUSED: /* XXX */ 615 fprintf(f, " %5lu %5lu %2s", 616 (u_long)pp->p_fsize, 617 (u_long)(pp->p_fsize * pp->p_frag), ""); 618 break; 619 620 case FS_BSDFFS: 621 fprintf(f, " %5lu %5lu %5u", 622 (u_long)pp->p_fsize, 623 (u_long)(pp->p_fsize * pp->p_frag), 624 pp->p_cpg); 625 break; 626 627 case FS_BSDLFS: 628 fprintf(f, " %5lu %5lu %5d", 629 (u_long)pp->p_fsize, 630 (u_long)(pp->p_fsize * pp->p_frag), 631 pp->p_cpg); 632 break; 633 634 default: 635 fprintf(f, "%20.20s", ""); 636 break; 637 } 638 if (i == RAW_PART) { 639 fprintf(f, " # \"raw\" part, don't edit"); 640 } 641 fprintf(f, "\n"); 642 } 643 } 644 fflush(f); 645 } 646 647 static int 648 edit(void) 649 { 650 int c, fd; 651 struct disklabel label; 652 FILE *fp; 653 654 if ((fd = mkstemp(tmpfil)) == -1 || 655 (fp = fdopen(fd, "w")) == NULL) { 656 warnx("can't create %s", tmpfil); 657 return (1); 658 } 659 display(fp, NULL); 660 fclose(fp); 661 for (;;) { 662 if (!editit()) 663 break; 664 fp = fopen(tmpfil, "r"); 665 if (fp == NULL) { 666 warnx("can't reopen %s for reading", tmpfil); 667 break; 668 } 669 bzero((char *)&label, sizeof(label)); 670 c = getasciilabel(fp, &label); 671 fclose(fp); 672 if (c) { 673 lab = label; 674 if (writelabel() == 0) { 675 (void) unlink(tmpfil); 676 return (0); 677 } 678 } 679 printf("re-edit the label? [y]: "); 680 fflush(stdout); 681 c = getchar(); 682 if (c != EOF && c != (int)'\n') 683 while (getchar() != (int)'\n') 684 ; 685 if (c == (int)'n') 686 break; 687 } 688 (void) unlink(tmpfil); 689 return (1); 690 } 691 692 static int 693 editit(void) 694 { 695 int pid, xpid; 696 int locstat, omask; 697 const char *ed; 698 uid_t uid; 699 gid_t gid; 700 701 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 702 while ((pid = fork()) < 0) { 703 if (errno == EPROCLIM) { 704 warnx("you have too many processes"); 705 return(0); 706 } 707 if (errno != EAGAIN) { 708 warn("fork"); 709 return(0); 710 } 711 sleep(1); 712 } 713 if (pid == 0) { 714 sigsetmask(omask); 715 gid = getgid(); 716 if (setresgid(gid, gid, gid) == -1) 717 err(1, "setresgid"); 718 uid = getuid(); 719 if (setresuid(uid, uid, uid) == -1) 720 err(1, "setresuid"); 721 if ((ed = getenv("EDITOR")) == (char *)0) 722 ed = DEFEDITOR; 723 execlp(ed, ed, tmpfil, (char *)0); 724 err(1, "%s", ed); 725 } 726 while ((xpid = wait(&locstat)) >= 0) 727 if (xpid == pid) 728 break; 729 sigsetmask(omask); 730 return(!locstat); 731 } 732 733 static char * 734 skip(char *cp) 735 { 736 737 while (*cp != '\0' && isspace(*cp)) 738 cp++; 739 if (*cp == '\0' || *cp == '#') 740 return (NULL); 741 return (cp); 742 } 743 744 static char * 745 word(char *cp) 746 { 747 char c; 748 749 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 750 cp++; 751 if ((c = *cp) != '\0') { 752 *cp++ = '\0'; 753 if (c != '#') 754 return (skip(cp)); 755 } 756 return (NULL); 757 } 758 759 /* 760 * Read an ascii label in from fd f, 761 * in the same format as that put out by display(), 762 * and fill in lp. 763 */ 764 static int 765 getasciilabel(FILE *f, struct disklabel *lp) 766 { 767 char *cp, *endp; 768 const char **cpp; 769 u_int part; 770 char *tp, line[BUFSIZ]; 771 u_long v; 772 int lineno = 0, errors = 0; 773 int i; 774 775 makelabel("auto", lp); 776 bzero(&part_set, sizeof(part_set)); 777 bzero(&part_size_type, sizeof(part_size_type)); 778 bzero(&part_offset_type, sizeof(part_offset_type)); 779 lp->d_bbsize = BBSIZE; /* XXX */ 780 lp->d_sbsize = 0; /* XXX */ 781 while (fgets(line, sizeof(line) - 1, f)) { 782 lineno++; 783 if ((cp = strchr(line,'\n')) != NULL) 784 *cp = '\0'; 785 cp = skip(line); 786 if (cp == NULL) 787 continue; 788 tp = strchr(cp, ':'); 789 if (tp == NULL) { 790 fprintf(stderr, "line %d: syntax error\n", lineno); 791 errors++; 792 continue; 793 } 794 *tp++ = '\0', tp = skip(tp); 795 if (!strcmp(cp, "type")) { 796 if (tp == NULL) 797 tp = unknown; 798 cpp = dktypenames; 799 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 800 if (*cpp && !strcmp(*cpp, tp)) { 801 lp->d_type = cpp - dktypenames; 802 break; 803 } 804 if (cpp < &dktypenames[DKMAXTYPES]) 805 continue; 806 errno = 0; 807 v = strtoul(tp, &endp, 10); 808 if (errno != 0 || *endp != '\0') 809 v = DKMAXTYPES; 810 if (v >= DKMAXTYPES) 811 fprintf(stderr, "line %d:%s %lu\n", lineno, 812 "Warning, unknown disk type", v); 813 else 814 lp->d_type = v; 815 continue; 816 } 817 if (!strcmp(cp, "flags")) { 818 for (v = 0; (cp = tp) && *cp != '\0';) { 819 tp = word(cp); 820 if (!strcmp(cp, "removeable")) 821 v |= D_REMOVABLE; 822 else if (!strcmp(cp, "ecc")) 823 v |= D_ECC; 824 else if (!strcmp(cp, "badsect")) 825 v |= D_BADSECT; 826 else { 827 fprintf(stderr, 828 "line %d: %s: bad flag\n", 829 lineno, cp); 830 errors++; 831 } 832 } 833 lp->d_flags = v; 834 continue; 835 } 836 if (!strcmp(cp, "drivedata")) { 837 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 838 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 839 tp = word(cp); 840 } 841 continue; 842 } 843 if (sscanf(cp, "%lu partitions", &v) == 1) { 844 if (v > MAXPARTITIONS) { 845 fprintf(stderr, 846 "line %d: bad # of partitions\n", lineno); 847 lp->d_npartitions = MAXPARTITIONS; 848 errors++; 849 } else if (v < DEFPARTITIONS) { 850 fprintf(stderr, 851 "line %d: bad # of partitions\n", lineno); 852 lp->d_npartitions = DEFPARTITIONS; 853 errors++; 854 } else 855 lp->d_npartitions = v; 856 continue; 857 } 858 if (tp == NULL) 859 tp = blank; 860 if (!strcmp(cp, "disk")) { 861 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 862 continue; 863 } 864 if (!strcmp(cp, "label")) { 865 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 866 continue; 867 } 868 if (!strcmp(cp, "bytes/sector")) { 869 v = strtoul(tp, NULL, 10); 870 if (v == 0 || (v % DEV_BSIZE) != 0) { 871 fprintf(stderr, 872 "line %d: %s: bad sector size\n", 873 lineno, tp); 874 errors++; 875 } else 876 lp->d_secsize = v; 877 continue; 878 } 879 if (!strcmp(cp, "sectors/track")) { 880 v = strtoul(tp, NULL, 10); 881 #if (ULONG_MAX != 0xffffffffUL) 882 if (v == 0 || v > 0xffffffff) 883 #else 884 if (v == 0) 885 #endif 886 { 887 fprintf(stderr, "line %d: %s: bad %s\n", 888 lineno, tp, cp); 889 errors++; 890 } else 891 lp->d_nsectors = v; 892 continue; 893 } 894 if (!strcmp(cp, "sectors/cylinder")) { 895 v = strtoul(tp, NULL, 10); 896 if (v == 0) { 897 fprintf(stderr, "line %d: %s: bad %s\n", 898 lineno, tp, cp); 899 errors++; 900 } else 901 lp->d_secpercyl = v; 902 continue; 903 } 904 if (!strcmp(cp, "tracks/cylinder")) { 905 v = strtoul(tp, NULL, 10); 906 if (v == 0) { 907 fprintf(stderr, "line %d: %s: bad %s\n", 908 lineno, tp, cp); 909 errors++; 910 } else 911 lp->d_ntracks = v; 912 continue; 913 } 914 if (!strcmp(cp, "cylinders")) { 915 v = strtoul(tp, NULL, 10); 916 if (v == 0) { 917 fprintf(stderr, "line %d: %s: bad %s\n", 918 lineno, tp, cp); 919 errors++; 920 } else 921 lp->d_ncylinders = v; 922 continue; 923 } 924 if (!strcmp(cp, "sectors/unit")) { 925 v = strtoul(tp, NULL, 10); 926 if (v == 0) { 927 fprintf(stderr, "line %d: %s: bad %s\n", 928 lineno, tp, cp); 929 errors++; 930 } else 931 lp->d_secperunit = v; 932 continue; 933 } 934 if (!strcmp(cp, "rpm")) { 935 v = strtoul(tp, NULL, 10); 936 if (v == 0 || v > USHRT_MAX) { 937 fprintf(stderr, "line %d: %s: bad %s\n", 938 lineno, tp, cp); 939 errors++; 940 } else 941 lp->d_rpm = v; 942 continue; 943 } 944 if (!strcmp(cp, "interleave")) { 945 v = strtoul(tp, NULL, 10); 946 if (v == 0 || v > USHRT_MAX) { 947 fprintf(stderr, "line %d: %s: bad %s\n", 948 lineno, tp, cp); 949 errors++; 950 } else 951 lp->d_interleave = v; 952 continue; 953 } 954 if (!strcmp(cp, "trackskew")) { 955 v = strtoul(tp, NULL, 10); 956 if (v > USHRT_MAX) { 957 fprintf(stderr, "line %d: %s: bad %s\n", 958 lineno, tp, cp); 959 errors++; 960 } else 961 lp->d_trackskew = v; 962 continue; 963 } 964 if (!strcmp(cp, "cylinderskew")) { 965 v = strtoul(tp, NULL, 10); 966 if (v > USHRT_MAX) { 967 fprintf(stderr, "line %d: %s: bad %s\n", 968 lineno, tp, cp); 969 errors++; 970 } else 971 lp->d_cylskew = v; 972 continue; 973 } 974 if (!strcmp(cp, "headswitch")) { 975 v = strtoul(tp, NULL, 10); 976 lp->d_headswitch = v; 977 continue; 978 } 979 if (!strcmp(cp, "track-to-track seek")) { 980 v = strtoul(tp, NULL, 10); 981 lp->d_trkseek = v; 982 continue; 983 } 984 /* the ':' was removed above */ 985 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 986 fprintf(stderr, 987 "line %d: %s: Unknown disklabel field\n", lineno, 988 cp); 989 errors++; 990 continue; 991 } 992 993 /* Process a partition specification line. */ 994 part = *cp - 'a'; 995 if (part >= lp->d_npartitions) { 996 fprintf(stderr, 997 "line %d: partition name out of range a-%c: %s\n", 998 lineno, 'a' + lp->d_npartitions - 1, cp); 999 errors++; 1000 continue; 1001 } 1002 part_set[part] = 1; 1003 1004 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1005 errors++; 1006 break; 1007 } 1008 } 1009 errors += checklabel(lp); 1010 return (errors == 0); 1011 } 1012 1013 #define NXTNUM(n) do { \ 1014 if (tp == NULL) { \ 1015 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1016 return (1); \ 1017 } else { \ 1018 cp = tp, tp = word(cp); \ 1019 (n) = strtoul(cp, NULL, 10); \ 1020 } \ 1021 } while (0) 1022 1023 /* retain 1 character following number */ 1024 #define NXTWORD(w,n) do { \ 1025 if (tp == NULL) { \ 1026 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1027 return (1); \ 1028 } else { \ 1029 char *tmp; \ 1030 cp = tp, tp = word(cp); \ 1031 (n) = strtoul(cp, &tmp, 10); \ 1032 if (tmp) (w) = *tmp; \ 1033 } \ 1034 } while (0) 1035 1036 /* 1037 * Read a partition line into partition `part' in the specified disklabel. 1038 * Return 0 on success, 1 on failure. 1039 */ 1040 static int 1041 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1042 { 1043 struct partition *pp; 1044 char *cp, *endp; 1045 const char **cpp; 1046 u_long v; 1047 1048 pp = &lp->d_partitions[part]; 1049 cp = NULL; 1050 1051 v = 0; 1052 NXTWORD(part_size_type[part],v); 1053 if (v == 0 && part_size_type[part] != '*') { 1054 fprintf(stderr, 1055 "line %d: %s: bad partition size\n", lineno, cp); 1056 return (1); 1057 } 1058 pp->p_size = v; 1059 1060 v = 0; 1061 NXTWORD(part_offset_type[part],v); 1062 if (v == 0 && part_offset_type[part] != '*' && 1063 part_offset_type[part] != '\0') { 1064 fprintf(stderr, 1065 "line %d: %s: bad partition offset\n", lineno, cp); 1066 return (1); 1067 } 1068 pp->p_offset = v; 1069 if (tp == NULL) { 1070 fprintf(stderr, "line %d: missing file system type\n", lineno); 1071 return (1); 1072 } 1073 cp = tp, tp = word(cp); 1074 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1075 if (*cpp && !strcmp(*cpp, cp)) 1076 break; 1077 if (*cpp != NULL) { 1078 pp->p_fstype = cpp - fstypenames; 1079 } else { 1080 if (isdigit(*cp)) { 1081 errno = 0; 1082 v = strtoul(cp, &endp, 10); 1083 if (errno != 0 || *endp != '\0') 1084 v = FSMAXTYPES; 1085 } else 1086 v = FSMAXTYPES; 1087 if (v >= FSMAXTYPES) { 1088 fprintf(stderr, 1089 "line %d: Warning, unknown file system type %s\n", 1090 lineno, cp); 1091 v = FS_UNUSED; 1092 } 1093 pp->p_fstype = v; 1094 } 1095 1096 switch (pp->p_fstype) { 1097 case FS_UNUSED: 1098 case FS_BSDFFS: 1099 case FS_BSDLFS: 1100 /* accept defaults for fsize/frag/cpg */ 1101 if (tp) { 1102 NXTNUM(pp->p_fsize); 1103 if (pp->p_fsize == 0) 1104 break; 1105 NXTNUM(v); 1106 pp->p_frag = v / pp->p_fsize; 1107 if (tp != NULL) 1108 NXTNUM(pp->p_cpg); 1109 } 1110 /* else default to 0's */ 1111 break; 1112 default: 1113 break; 1114 } 1115 return (0); 1116 } 1117 1118 /* 1119 * Check disklabel for errors and fill in 1120 * derived fields according to supplied values. 1121 */ 1122 static int 1123 checklabel(struct disklabel *lp) 1124 { 1125 struct partition *pp; 1126 int i, errors = 0; 1127 char part; 1128 u_long base_offset, needed, total_size, total_percent, current_offset; 1129 long free_space; 1130 int seen_default_offset; 1131 int hog_part; 1132 int j; 1133 struct partition *pp2; 1134 1135 if (lp == NULL) 1136 lp = &lab; 1137 1138 if (allfields) { 1139 1140 if (lp->d_secsize == 0) { 1141 fprintf(stderr, "sector size 0\n"); 1142 return (1); 1143 } 1144 if (lp->d_nsectors == 0) { 1145 fprintf(stderr, "sectors/track 0\n"); 1146 return (1); 1147 } 1148 if (lp->d_ntracks == 0) { 1149 fprintf(stderr, "tracks/cylinder 0\n"); 1150 return (1); 1151 } 1152 if (lp->d_ncylinders == 0) { 1153 fprintf(stderr, "cylinders/unit 0\n"); 1154 errors++; 1155 } 1156 if (lp->d_rpm == 0) 1157 warnx("revolutions/minute 0"); 1158 if (lp->d_secpercyl == 0) 1159 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1160 if (lp->d_secperunit == 0) 1161 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1162 if (lp->d_bbsize == 0) { 1163 fprintf(stderr, "boot block size 0\n"); 1164 errors++; 1165 } else if (lp->d_bbsize % lp->d_secsize) 1166 warnx("boot block size %% sector-size != 0"); 1167 if (lp->d_npartitions > MAXPARTITIONS) { 1168 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1169 (u_long)lp->d_npartitions, MAXPARTITIONS); 1170 errors++; 1171 } 1172 if (lp->d_npartitions < DEFPARTITIONS) { 1173 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)", 1174 (u_long)lp->d_npartitions, DEFPARTITIONS); 1175 errors++; 1176 } 1177 } else { 1178 struct disklabel *vl; 1179 1180 vl = getvirginlabel(); 1181 if (lp->d_secsize == 0) 1182 lp->d_secsize = vl->d_secsize; 1183 if (lp->d_nsectors == 0) 1184 lp->d_nsectors = vl->d_nsectors; 1185 if (lp->d_ntracks == 0) 1186 lp->d_ntracks = vl->d_ntracks; 1187 if (lp->d_ncylinders == 0) 1188 lp->d_ncylinders = vl->d_ncylinders; 1189 if (lp->d_rpm == 0) 1190 lp->d_rpm = vl->d_rpm; 1191 if (lp->d_interleave == 0) 1192 lp->d_interleave = vl->d_interleave; 1193 if (lp->d_secpercyl == 0) 1194 lp->d_secpercyl = vl->d_secpercyl; 1195 if (lp->d_secperunit == 0 || 1196 lp->d_secperunit > vl->d_secperunit) 1197 lp->d_secperunit = vl->d_secperunit; 1198 if (lp->d_bbsize == 0) 1199 lp->d_bbsize = vl->d_bbsize; 1200 if (lp->d_npartitions < DEFPARTITIONS || 1201 lp->d_npartitions > MAXPARTITIONS) 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 enlightened days uses the CHS geometry for 1515 * anything, but nonetheless 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