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 !strcmp(optarg, "pc98")) { 169 labelsoffset = 1; 170 labeloffset = 0; 171 bbsize = 8192; 172 } else { 173 errx(1, "Unsupported architecture"); 174 } 175 break; 176 case 'n': 177 disable_write = 1; 178 break; 179 case 'R': 180 if (op != UNSPEC) 181 usage(); 182 op = RESTORE; 183 break; 184 case 'e': 185 if (op != UNSPEC) 186 usage(); 187 op = EDIT; 188 break; 189 case 'r': 190 /* 191 * We accept and ignore -r for compatibility with 192 * historical disklabel usage. 193 */ 194 break; 195 case 'w': 196 if (op != UNSPEC) 197 usage(); 198 op = WRITE; 199 break; 200 case '?': 201 default: 202 usage(); 203 } 204 argc -= optind; 205 argv += optind; 206 207 if (argc < 1) 208 usage(); 209 if (labelsoffset < 0 || labeloffset < 0) 210 errx(1, "a -m <architecture> option must be specified"); 211 212 /* Figure out the names of the thing we're working on */ 213 if (is_file) { 214 specname = argv[0]; 215 } else { 216 specname = g_device_path(argv[0]); 217 if (specname == NULL) { 218 warn("unable to get correct path for %s", argv[0]); 219 return(1); 220 } 221 fd = open(specname, O_RDONLY); 222 if (fd < 0) { 223 warn("error opening %s", specname); 224 return(1); 225 } 226 pname = g_providername(fd); 227 if (pname == NULL) { 228 warn("error getting providername for %s", specname); 229 close(fd); 230 return(1); 231 } 232 close(fd); 233 } 234 235 if (installboot && op == UNSPEC) 236 op = WRITEBOOT; 237 else if (op == UNSPEC) 238 op = READ; 239 240 switch(op) { 241 242 case UNSPEC: 243 break; 244 245 case EDIT: 246 if (argc != 1) 247 usage(); 248 readlabel(1); 249 fixlabel(&lab); 250 error = edit(); 251 break; 252 253 case READ: 254 if (argc != 1) 255 usage(); 256 readlabel(1); 257 display(stdout, NULL); 258 error = checklabel(NULL); 259 break; 260 261 case RESTORE: 262 if (argc != 2) 263 usage(); 264 if (!(t = fopen(argv[1], "r"))) 265 err(4, "fopen %s", argv[1]); 266 readlabel(0); 267 if (!getasciilabel(t, &lab)) 268 exit(1); 269 error = writelabel(); 270 break; 271 272 case WRITE: 273 if (argc == 2) 274 name = argv[1]; 275 else if (argc == 1) 276 name = "auto"; 277 else 278 usage(); 279 readlabel(0); 280 makelabel(name, &lab); 281 fixlabel(&lab); 282 if (checklabel(NULL) == 0) 283 error = writelabel(); 284 break; 285 286 case WRITEBOOT: 287 288 readlabel(1); 289 fixlabel(&lab); 290 if (argc == 2) 291 makelabel(argv[1], &lab); 292 if (checklabel(NULL) == 0) 293 error = writelabel(); 294 break; 295 } 296 exit(error); 297 } 298 299 static void 300 fixlabel(struct disklabel *lp) 301 { 302 struct partition *dp; 303 int i; 304 305 for (i = 0; i < lp->d_npartitions; i++) { 306 if (i == RAW_PART) 307 continue; 308 if (lp->d_partitions[i].p_size) 309 return; 310 } 311 312 dp = &lp->d_partitions[0]; 313 dp->p_offset = BBSIZE / secsize; 314 dp->p_size = lp->d_secperunit - dp->p_offset; 315 } 316 317 /* 318 * Construct a prototype disklabel from /etc/disktab. 319 */ 320 static void 321 makelabel(const char *type, struct disklabel *lp) 322 { 323 struct disklabel *dp; 324 325 if (strcmp(type, "auto") == 0) 326 dp = getvirginlabel(); 327 else 328 dp = getdiskbyname(type); 329 if (dp == NULL) 330 errx(1, "%s: unknown disk type", type); 331 *lp = *dp; 332 bzero(lp->d_packname, sizeof(lp->d_packname)); 333 } 334 335 static void 336 readboot(void) 337 { 338 int fd; 339 struct stat st; 340 341 if (xxboot == NULL) 342 xxboot = "/boot/boot"; 343 fd = open(xxboot, O_RDONLY); 344 if (fd < 0) 345 err(1, "cannot open %s", xxboot); 346 fstat(fd, &st); 347 if (st.st_size <= BBSIZE) { 348 if (read(fd, bootarea, st.st_size) != st.st_size) 349 err(1, "read error %s", xxboot); 350 close(fd); 351 return; 352 } 353 errx(1, "boot code %s is wrong size", xxboot); 354 } 355 356 static int 357 geom_class_available(const char *name) 358 { 359 struct gclass *class; 360 struct gmesh mesh; 361 int error; 362 363 error = geom_gettree(&mesh); 364 if (error != 0) 365 errc(1, error, "Cannot get GEOM tree"); 366 367 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 368 if (strcmp(class->lg_name, name) == 0) { 369 geom_deletetree(&mesh); 370 return (1); 371 } 372 } 373 374 geom_deletetree(&mesh); 375 376 return (0); 377 } 378 379 static int 380 writelabel(void) 381 { 382 int i, fd, serrno; 383 struct gctl_req *grq; 384 char const *errstr; 385 struct disklabel *lp = &lab; 386 387 if (disable_write) { 388 warnx("write to disk label suppressed - label was as follows:"); 389 display(stdout, NULL); 390 return (0); 391 } 392 393 lp->d_magic = DISKMAGIC; 394 lp->d_magic2 = DISKMAGIC; 395 lp->d_checksum = 0; 396 lp->d_checksum = dkcksum(lp); 397 if (installboot) 398 readboot(); 399 for (i = 0; i < lab.d_npartitions; i++) 400 if (lab.d_partitions[i].p_size) 401 lab.d_partitions[i].p_offset += lba_offset; 402 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize, 403 lp); 404 405 fd = open(specname, O_RDWR); 406 if (fd < 0) { 407 if (is_file) { 408 warn("cannot open file %s for writing label", specname); 409 return(1); 410 } else 411 serrno = errno; 412 413 if (geom_class_available("PART") != 0) { 414 /* 415 * Since we weren't able open provider for 416 * writing, then recommend user to use gpart(8). 417 */ 418 warnc(serrno, 419 "cannot open provider %s for writing label", 420 specname); 421 warnx("Try to use gpart(8)."); 422 return (1); 423 } 424 425 /* Give up if GEOM_BSD is not available. */ 426 if (geom_class_available("BSD") == 0) { 427 warnc(serrno, "%s", specname); 428 return (1); 429 } 430 431 grq = gctl_get_handle(); 432 gctl_ro_param(grq, "verb", -1, "write label"); 433 gctl_ro_param(grq, "class", -1, "BSD"); 434 gctl_ro_param(grq, "geom", -1, pname); 435 gctl_ro_param(grq, "label", 148+16*8, 436 bootarea + labeloffset + labelsoffset * lab.d_secsize); 437 errstr = gctl_issue(grq); 438 if (errstr != NULL) { 439 warnx("%s", errstr); 440 gctl_free(grq); 441 return(1); 442 } 443 gctl_free(grq); 444 if (installboot) { 445 grq = gctl_get_handle(); 446 gctl_ro_param(grq, "verb", -1, "write bootcode"); 447 gctl_ro_param(grq, "class", -1, "BSD"); 448 gctl_ro_param(grq, "geom", -1, pname); 449 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 450 errstr = gctl_issue(grq); 451 if (errstr != NULL) { 452 warnx("%s", errstr); 453 gctl_free(grq); 454 return (1); 455 } 456 gctl_free(grq); 457 } 458 } else { 459 if (write(fd, bootarea, bbsize) != bbsize) { 460 warn("write %s", specname); 461 close (fd); 462 return (1); 463 } 464 close (fd); 465 } 466 return (0); 467 } 468 469 static void 470 get_file_parms(int f) 471 { 472 int i; 473 struct stat sb; 474 475 if (fstat(f, &sb) != 0) 476 err(4, "fstat failed"); 477 i = sb.st_mode & S_IFMT; 478 if (i != S_IFREG && i != S_IFLNK) 479 errx(4, "%s is not a valid file or link", specname); 480 secsize = DEV_BSIZE; 481 mediasize = sb.st_size; 482 } 483 484 /* 485 * Fetch disklabel for disk. 486 */ 487 static int 488 readlabel(int flag) 489 { 490 ssize_t nbytes; 491 uint32_t lba; 492 int f, i; 493 int error; 494 495 f = open(specname, O_RDONLY); 496 if (f < 0) 497 err(1, "%s", specname); 498 if (is_file) 499 get_file_parms(f); 500 else { 501 mediasize = g_mediasize(f); 502 secsize = g_sectorsize(f); 503 if (secsize < 0 || mediasize < 0) 504 err(4, "cannot get disk geometry"); 505 } 506 if (mediasize > (off_t)0xffffffff * secsize) 507 errx(1, 508 "disks with more than 2^32-1 sectors are not supported"); 509 (void)lseek(f, (off_t)0, SEEK_SET); 510 nbytes = read(f, bootarea, BBSIZE); 511 if (nbytes == -1) 512 err(4, "%s read", specname); 513 if (nbytes != BBSIZE) 514 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 515 close (f); 516 error = bsd_disklabel_le_dec( 517 bootarea + (labeloffset + labelsoffset * secsize), 518 &lab, MAXPARTITIONS); 519 if (flag && error) 520 errx(1, "%s: no valid label found", specname); 521 522 if (is_file) 523 return(0); 524 525 /* 526 * Compensate for absolute block addressing by finding the 527 * smallest partition offset and if the offset of the 'c' 528 * partition is equal to that, subtract it from all offsets. 529 */ 530 lba = ~0; 531 for (i = 0; i < lab.d_npartitions; i++) { 532 if (lab.d_partitions[i].p_size) 533 lba = MIN(lba, lab.d_partitions[i].p_offset); 534 } 535 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 536 for (i = 0; i < lab.d_npartitions; i++) { 537 if (lab.d_partitions[i].p_size) 538 lab.d_partitions[i].p_offset -= lba; 539 } 540 /* 541 * Save the offset so that we can write the label 542 * back with absolute block addresses. 543 */ 544 lba_offset = lba; 545 } 546 return (error); 547 } 548 549 550 static void 551 display(FILE *f, const struct disklabel *lp) 552 { 553 int i, j; 554 const struct partition *pp; 555 556 if (lp == NULL) 557 lp = &lab; 558 559 fprintf(f, "# %s:\n", specname); 560 if (allfields) { 561 if (lp->d_type < DKMAXTYPES) 562 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 563 else 564 fprintf(f, "type: %u\n", lp->d_type); 565 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 566 lp->d_typename); 567 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 568 lp->d_packname); 569 fprintf(f, "flags:"); 570 if (lp->d_flags & D_REMOVABLE) 571 fprintf(f, " removeable"); 572 if (lp->d_flags & D_ECC) 573 fprintf(f, " ecc"); 574 if (lp->d_flags & D_BADSECT) 575 fprintf(f, " badsect"); 576 fprintf(f, "\n"); 577 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 578 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 579 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 580 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 581 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 582 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 583 fprintf(f, "rpm: %u\n", lp->d_rpm); 584 fprintf(f, "interleave: %u\n", lp->d_interleave); 585 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 586 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 587 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 588 (u_long)lp->d_headswitch); 589 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 590 (u_long)lp->d_trkseek); 591 fprintf(f, "drivedata: "); 592 for (i = NDDATA - 1; i >= 0; i--) 593 if (lp->d_drivedata[i]) 594 break; 595 if (i < 0) 596 i = 0; 597 for (j = 0; j <= i; j++) 598 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 599 fprintf(f, "\n\n"); 600 } 601 fprintf(f, "%u partitions:\n", lp->d_npartitions); 602 fprintf(f, 603 "# size offset fstype [fsize bsize bps/cpg]\n"); 604 pp = lp->d_partitions; 605 for (i = 0; i < lp->d_npartitions; i++, pp++) { 606 if (pp->p_size) { 607 fprintf(f, " %c: %10lu %10lu ", 'a' + i, 608 (u_long)pp->p_size, (u_long)pp->p_offset); 609 if (pp->p_fstype < FSMAXTYPES) 610 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 611 else 612 fprintf(f, "%8d", pp->p_fstype); 613 switch (pp->p_fstype) { 614 615 case FS_UNUSED: /* XXX */ 616 fprintf(f, " %5lu %5lu %2s", 617 (u_long)pp->p_fsize, 618 (u_long)(pp->p_fsize * pp->p_frag), ""); 619 break; 620 621 case FS_BSDFFS: 622 fprintf(f, " %5lu %5lu %5u", 623 (u_long)pp->p_fsize, 624 (u_long)(pp->p_fsize * pp->p_frag), 625 pp->p_cpg); 626 break; 627 628 case FS_BSDLFS: 629 fprintf(f, " %5lu %5lu %5d", 630 (u_long)pp->p_fsize, 631 (u_long)(pp->p_fsize * pp->p_frag), 632 pp->p_cpg); 633 break; 634 635 default: 636 fprintf(f, "%20.20s", ""); 637 break; 638 } 639 if (i == RAW_PART) { 640 fprintf(f, " # \"raw\" part, don't edit"); 641 } 642 fprintf(f, "\n"); 643 } 644 } 645 fflush(f); 646 } 647 648 static int 649 edit(void) 650 { 651 int c, fd; 652 struct disklabel label; 653 FILE *fp; 654 655 if ((fd = mkstemp(tmpfil)) == -1 || 656 (fp = fdopen(fd, "w")) == NULL) { 657 warnx("can't create %s", tmpfil); 658 return (1); 659 } 660 display(fp, NULL); 661 fclose(fp); 662 for (;;) { 663 if (!editit()) 664 break; 665 fp = fopen(tmpfil, "r"); 666 if (fp == NULL) { 667 warnx("can't reopen %s for reading", tmpfil); 668 break; 669 } 670 bzero((char *)&label, sizeof(label)); 671 c = getasciilabel(fp, &label); 672 fclose(fp); 673 if (c) { 674 lab = label; 675 if (writelabel() == 0) { 676 (void) unlink(tmpfil); 677 return (0); 678 } 679 } 680 printf("re-edit the label? [y]: "); 681 fflush(stdout); 682 c = getchar(); 683 if (c != EOF && c != (int)'\n') 684 while (getchar() != (int)'\n') 685 ; 686 if (c == (int)'n') 687 break; 688 } 689 (void) unlink(tmpfil); 690 return (1); 691 } 692 693 static int 694 editit(void) 695 { 696 int pid, xpid; 697 int locstat, omask; 698 const char *ed; 699 uid_t uid; 700 gid_t gid; 701 702 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 703 while ((pid = fork()) < 0) { 704 if (errno == EPROCLIM) { 705 warnx("you have too many processes"); 706 return(0); 707 } 708 if (errno != EAGAIN) { 709 warn("fork"); 710 return(0); 711 } 712 sleep(1); 713 } 714 if (pid == 0) { 715 sigsetmask(omask); 716 gid = getgid(); 717 if (setresgid(gid, gid, gid) == -1) 718 err(1, "setresgid"); 719 uid = getuid(); 720 if (setresuid(uid, uid, uid) == -1) 721 err(1, "setresuid"); 722 if ((ed = getenv("EDITOR")) == (char *)0) 723 ed = DEFEDITOR; 724 execlp(ed, ed, tmpfil, (char *)0); 725 err(1, "%s", ed); 726 } 727 while ((xpid = wait(&locstat)) >= 0) 728 if (xpid == pid) 729 break; 730 sigsetmask(omask); 731 return(!locstat); 732 } 733 734 static char * 735 skip(char *cp) 736 { 737 738 while (*cp != '\0' && isspace(*cp)) 739 cp++; 740 if (*cp == '\0' || *cp == '#') 741 return (NULL); 742 return (cp); 743 } 744 745 static char * 746 word(char *cp) 747 { 748 char c; 749 750 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 751 cp++; 752 if ((c = *cp) != '\0') { 753 *cp++ = '\0'; 754 if (c != '#') 755 return (skip(cp)); 756 } 757 return (NULL); 758 } 759 760 /* 761 * Read an ascii label in from fd f, 762 * in the same format as that put out by display(), 763 * and fill in lp. 764 */ 765 static int 766 getasciilabel(FILE *f, struct disklabel *lp) 767 { 768 char *cp, *endp; 769 const char **cpp; 770 u_int part; 771 char *tp, line[BUFSIZ]; 772 u_long v; 773 int lineno = 0, errors = 0; 774 int i; 775 776 makelabel("auto", lp); 777 bzero(&part_set, sizeof(part_set)); 778 bzero(&part_size_type, sizeof(part_size_type)); 779 bzero(&part_offset_type, sizeof(part_offset_type)); 780 lp->d_bbsize = BBSIZE; /* XXX */ 781 lp->d_sbsize = 0; /* XXX */ 782 while (fgets(line, sizeof(line) - 1, f)) { 783 lineno++; 784 if ((cp = strchr(line,'\n')) != NULL) 785 *cp = '\0'; 786 cp = skip(line); 787 if (cp == NULL) 788 continue; 789 tp = strchr(cp, ':'); 790 if (tp == NULL) { 791 fprintf(stderr, "line %d: syntax error\n", lineno); 792 errors++; 793 continue; 794 } 795 *tp++ = '\0', tp = skip(tp); 796 if (!strcmp(cp, "type")) { 797 if (tp == NULL) 798 tp = unknown; 799 cpp = dktypenames; 800 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 801 if (*cpp && !strcmp(*cpp, tp)) { 802 lp->d_type = cpp - dktypenames; 803 break; 804 } 805 if (cpp < &dktypenames[DKMAXTYPES]) 806 continue; 807 errno = 0; 808 v = strtoul(tp, &endp, 10); 809 if (errno != 0 || *endp != '\0') 810 v = DKMAXTYPES; 811 if (v >= DKMAXTYPES) 812 fprintf(stderr, "line %d:%s %lu\n", lineno, 813 "Warning, unknown disk type", v); 814 else 815 lp->d_type = v; 816 continue; 817 } 818 if (!strcmp(cp, "flags")) { 819 for (v = 0; (cp = tp) && *cp != '\0';) { 820 tp = word(cp); 821 if (!strcmp(cp, "removeable")) 822 v |= D_REMOVABLE; 823 else if (!strcmp(cp, "ecc")) 824 v |= D_ECC; 825 else if (!strcmp(cp, "badsect")) 826 v |= D_BADSECT; 827 else { 828 fprintf(stderr, 829 "line %d: %s: bad flag\n", 830 lineno, cp); 831 errors++; 832 } 833 } 834 lp->d_flags = v; 835 continue; 836 } 837 if (!strcmp(cp, "drivedata")) { 838 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 839 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 840 tp = word(cp); 841 } 842 continue; 843 } 844 if (sscanf(cp, "%lu partitions", &v) == 1) { 845 if (v > MAXPARTITIONS) { 846 fprintf(stderr, 847 "line %d: bad # of partitions\n", lineno); 848 lp->d_npartitions = MAXPARTITIONS; 849 errors++; 850 } else if (v < DEFPARTITIONS) { 851 fprintf(stderr, 852 "line %d: bad # of partitions\n", lineno); 853 lp->d_npartitions = DEFPARTITIONS; 854 errors++; 855 } else 856 lp->d_npartitions = v; 857 continue; 858 } 859 if (tp == NULL) 860 tp = blank; 861 if (!strcmp(cp, "disk")) { 862 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 863 continue; 864 } 865 if (!strcmp(cp, "label")) { 866 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 867 continue; 868 } 869 if (!strcmp(cp, "bytes/sector")) { 870 v = strtoul(tp, NULL, 10); 871 if (v == 0 || (v % DEV_BSIZE) != 0) { 872 fprintf(stderr, 873 "line %d: %s: bad sector size\n", 874 lineno, tp); 875 errors++; 876 } else 877 lp->d_secsize = v; 878 continue; 879 } 880 if (!strcmp(cp, "sectors/track")) { 881 v = strtoul(tp, NULL, 10); 882 #if (ULONG_MAX != 0xffffffffUL) 883 if (v == 0 || v > 0xffffffff) 884 #else 885 if (v == 0) 886 #endif 887 { 888 fprintf(stderr, "line %d: %s: bad %s\n", 889 lineno, tp, cp); 890 errors++; 891 } else 892 lp->d_nsectors = v; 893 continue; 894 } 895 if (!strcmp(cp, "sectors/cylinder")) { 896 v = strtoul(tp, NULL, 10); 897 if (v == 0) { 898 fprintf(stderr, "line %d: %s: bad %s\n", 899 lineno, tp, cp); 900 errors++; 901 } else 902 lp->d_secpercyl = v; 903 continue; 904 } 905 if (!strcmp(cp, "tracks/cylinder")) { 906 v = strtoul(tp, NULL, 10); 907 if (v == 0) { 908 fprintf(stderr, "line %d: %s: bad %s\n", 909 lineno, tp, cp); 910 errors++; 911 } else 912 lp->d_ntracks = v; 913 continue; 914 } 915 if (!strcmp(cp, "cylinders")) { 916 v = strtoul(tp, NULL, 10); 917 if (v == 0) { 918 fprintf(stderr, "line %d: %s: bad %s\n", 919 lineno, tp, cp); 920 errors++; 921 } else 922 lp->d_ncylinders = v; 923 continue; 924 } 925 if (!strcmp(cp, "sectors/unit")) { 926 v = strtoul(tp, NULL, 10); 927 if (v == 0) { 928 fprintf(stderr, "line %d: %s: bad %s\n", 929 lineno, tp, cp); 930 errors++; 931 } else 932 lp->d_secperunit = v; 933 continue; 934 } 935 if (!strcmp(cp, "rpm")) { 936 v = strtoul(tp, NULL, 10); 937 if (v == 0 || v > USHRT_MAX) { 938 fprintf(stderr, "line %d: %s: bad %s\n", 939 lineno, tp, cp); 940 errors++; 941 } else 942 lp->d_rpm = v; 943 continue; 944 } 945 if (!strcmp(cp, "interleave")) { 946 v = strtoul(tp, NULL, 10); 947 if (v == 0 || v > USHRT_MAX) { 948 fprintf(stderr, "line %d: %s: bad %s\n", 949 lineno, tp, cp); 950 errors++; 951 } else 952 lp->d_interleave = v; 953 continue; 954 } 955 if (!strcmp(cp, "trackskew")) { 956 v = strtoul(tp, NULL, 10); 957 if (v > USHRT_MAX) { 958 fprintf(stderr, "line %d: %s: bad %s\n", 959 lineno, tp, cp); 960 errors++; 961 } else 962 lp->d_trackskew = v; 963 continue; 964 } 965 if (!strcmp(cp, "cylinderskew")) { 966 v = strtoul(tp, NULL, 10); 967 if (v > USHRT_MAX) { 968 fprintf(stderr, "line %d: %s: bad %s\n", 969 lineno, tp, cp); 970 errors++; 971 } else 972 lp->d_cylskew = v; 973 continue; 974 } 975 if (!strcmp(cp, "headswitch")) { 976 v = strtoul(tp, NULL, 10); 977 lp->d_headswitch = v; 978 continue; 979 } 980 if (!strcmp(cp, "track-to-track seek")) { 981 v = strtoul(tp, NULL, 10); 982 lp->d_trkseek = v; 983 continue; 984 } 985 /* the ':' was removed above */ 986 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 987 fprintf(stderr, 988 "line %d: %s: Unknown disklabel field\n", lineno, 989 cp); 990 errors++; 991 continue; 992 } 993 994 /* Process a partition specification line. */ 995 part = *cp - 'a'; 996 if (part >= lp->d_npartitions) { 997 fprintf(stderr, 998 "line %d: partition name out of range a-%c: %s\n", 999 lineno, 'a' + lp->d_npartitions - 1, cp); 1000 errors++; 1001 continue; 1002 } 1003 part_set[part] = 1; 1004 1005 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1006 errors++; 1007 break; 1008 } 1009 } 1010 errors += checklabel(lp); 1011 return (errors == 0); 1012 } 1013 1014 #define NXTNUM(n) do { \ 1015 if (tp == NULL) { \ 1016 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1017 return (1); \ 1018 } else { \ 1019 cp = tp, tp = word(cp); \ 1020 (n) = strtoul(cp, NULL, 10); \ 1021 } \ 1022 } while (0) 1023 1024 /* retain 1 character following number */ 1025 #define NXTWORD(w,n) do { \ 1026 if (tp == NULL) { \ 1027 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1028 return (1); \ 1029 } else { \ 1030 char *tmp; \ 1031 cp = tp, tp = word(cp); \ 1032 (n) = strtoul(cp, &tmp, 10); \ 1033 if (tmp) (w) = *tmp; \ 1034 } \ 1035 } while (0) 1036 1037 /* 1038 * Read a partition line into partition `part' in the specified disklabel. 1039 * Return 0 on success, 1 on failure. 1040 */ 1041 static int 1042 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1043 { 1044 struct partition *pp; 1045 char *cp, *endp; 1046 const char **cpp; 1047 u_long v; 1048 1049 pp = &lp->d_partitions[part]; 1050 cp = NULL; 1051 1052 v = 0; 1053 NXTWORD(part_size_type[part],v); 1054 if (v == 0 && part_size_type[part] != '*') { 1055 fprintf(stderr, 1056 "line %d: %s: bad partition size\n", lineno, cp); 1057 return (1); 1058 } 1059 pp->p_size = v; 1060 1061 v = 0; 1062 NXTWORD(part_offset_type[part],v); 1063 if (v == 0 && part_offset_type[part] != '*' && 1064 part_offset_type[part] != '\0') { 1065 fprintf(stderr, 1066 "line %d: %s: bad partition offset\n", lineno, cp); 1067 return (1); 1068 } 1069 pp->p_offset = v; 1070 if (tp == NULL) { 1071 fprintf(stderr, "line %d: missing file system type\n", lineno); 1072 return (1); 1073 } 1074 cp = tp, tp = word(cp); 1075 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1076 if (*cpp && !strcmp(*cpp, cp)) 1077 break; 1078 if (*cpp != NULL) { 1079 pp->p_fstype = cpp - fstypenames; 1080 } else { 1081 if (isdigit(*cp)) { 1082 errno = 0; 1083 v = strtoul(cp, &endp, 10); 1084 if (errno != 0 || *endp != '\0') 1085 v = FSMAXTYPES; 1086 } else 1087 v = FSMAXTYPES; 1088 if (v >= FSMAXTYPES) { 1089 fprintf(stderr, 1090 "line %d: Warning, unknown file system type %s\n", 1091 lineno, cp); 1092 v = FS_UNUSED; 1093 } 1094 pp->p_fstype = v; 1095 } 1096 1097 switch (pp->p_fstype) { 1098 case FS_UNUSED: 1099 case FS_BSDFFS: 1100 case FS_BSDLFS: 1101 /* accept defaults for fsize/frag/cpg */ 1102 if (tp) { 1103 NXTNUM(pp->p_fsize); 1104 if (pp->p_fsize == 0) 1105 break; 1106 NXTNUM(v); 1107 pp->p_frag = v / pp->p_fsize; 1108 if (tp != NULL) 1109 NXTNUM(pp->p_cpg); 1110 } 1111 /* else default to 0's */ 1112 break; 1113 default: 1114 break; 1115 } 1116 return (0); 1117 } 1118 1119 /* 1120 * Check disklabel for errors and fill in 1121 * derived fields according to supplied values. 1122 */ 1123 static int 1124 checklabel(struct disklabel *lp) 1125 { 1126 struct partition *pp; 1127 int i, errors = 0; 1128 char part; 1129 u_long base_offset, needed, total_size, total_percent, current_offset; 1130 long free_space; 1131 int seen_default_offset; 1132 int hog_part; 1133 int j; 1134 struct partition *pp2; 1135 1136 if (lp == NULL) 1137 lp = &lab; 1138 1139 if (allfields) { 1140 1141 if (lp->d_secsize == 0) { 1142 fprintf(stderr, "sector size 0\n"); 1143 return (1); 1144 } 1145 if (lp->d_nsectors == 0) { 1146 fprintf(stderr, "sectors/track 0\n"); 1147 return (1); 1148 } 1149 if (lp->d_ntracks == 0) { 1150 fprintf(stderr, "tracks/cylinder 0\n"); 1151 return (1); 1152 } 1153 if (lp->d_ncylinders == 0) { 1154 fprintf(stderr, "cylinders/unit 0\n"); 1155 errors++; 1156 } 1157 if (lp->d_rpm == 0) 1158 warnx("revolutions/minute 0"); 1159 if (lp->d_secpercyl == 0) 1160 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1161 if (lp->d_secperunit == 0) 1162 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1163 if (lp->d_bbsize == 0) { 1164 fprintf(stderr, "boot block size 0\n"); 1165 errors++; 1166 } else if (lp->d_bbsize % lp->d_secsize) 1167 warnx("boot block size %% sector-size != 0"); 1168 if (lp->d_npartitions > MAXPARTITIONS) { 1169 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1170 (u_long)lp->d_npartitions, MAXPARTITIONS); 1171 errors++; 1172 } 1173 if (lp->d_npartitions < DEFPARTITIONS) { 1174 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)", 1175 (u_long)lp->d_npartitions, DEFPARTITIONS); 1176 errors++; 1177 } 1178 } else { 1179 struct disklabel *vl; 1180 1181 vl = getvirginlabel(); 1182 if (lp->d_secsize == 0) 1183 lp->d_secsize = vl->d_secsize; 1184 if (lp->d_nsectors == 0) 1185 lp->d_nsectors = vl->d_nsectors; 1186 if (lp->d_ntracks == 0) 1187 lp->d_ntracks = vl->d_ntracks; 1188 if (lp->d_ncylinders == 0) 1189 lp->d_ncylinders = vl->d_ncylinders; 1190 if (lp->d_rpm == 0) 1191 lp->d_rpm = vl->d_rpm; 1192 if (lp->d_interleave == 0) 1193 lp->d_interleave = vl->d_interleave; 1194 if (lp->d_secpercyl == 0) 1195 lp->d_secpercyl = vl->d_secpercyl; 1196 if (lp->d_secperunit == 0 || 1197 lp->d_secperunit > vl->d_secperunit) 1198 lp->d_secperunit = vl->d_secperunit; 1199 if (lp->d_bbsize == 0) 1200 lp->d_bbsize = vl->d_bbsize; 1201 if (lp->d_npartitions < DEFPARTITIONS || 1202 lp->d_npartitions > MAXPARTITIONS) 1203 lp->d_npartitions = vl->d_npartitions; 1204 } 1205 1206 1207 /* first allocate space to the partitions, then offsets */ 1208 total_size = 0; /* in sectors */ 1209 total_percent = 0; /* in percent */ 1210 hog_part = -1; 1211 /* find all fixed partitions */ 1212 for (i = 0; i < lp->d_npartitions; i++) { 1213 pp = &lp->d_partitions[i]; 1214 if (part_set[i]) { 1215 if (part_size_type[i] == '*') { 1216 if (i == RAW_PART) { 1217 pp->p_size = lp->d_secperunit; 1218 } else { 1219 if (hog_part != -1) 1220 warnx("Too many '*' partitions (%c and %c)", 1221 hog_part + 'a',i + 'a'); 1222 else 1223 hog_part = i; 1224 } 1225 } else { 1226 off_t size; 1227 1228 size = pp->p_size; 1229 switch (part_size_type[i]) { 1230 case '%': 1231 total_percent += size; 1232 break; 1233 case 't': 1234 case 'T': 1235 size *= 1024ULL; 1236 /* FALLTHROUGH */ 1237 case 'g': 1238 case 'G': 1239 size *= 1024ULL; 1240 /* FALLTHROUGH */ 1241 case 'm': 1242 case 'M': 1243 size *= 1024ULL; 1244 /* FALLTHROUGH */ 1245 case 'k': 1246 case 'K': 1247 size *= 1024ULL; 1248 break; 1249 case '\0': 1250 break; 1251 default: 1252 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1253 part_size_type[i], i + 'a'); 1254 break; 1255 } 1256 /* don't count %'s yet */ 1257 if (part_size_type[i] != '%') { 1258 /* 1259 * for all not in sectors, convert to 1260 * sectors 1261 */ 1262 if (part_size_type[i] != '\0') { 1263 if (size % lp->d_secsize != 0) 1264 warnx("partition %c not an integer number of sectors", 1265 i + 'a'); 1266 size /= lp->d_secsize; 1267 pp->p_size = size; 1268 } 1269 /* else already in sectors */ 1270 if (i != RAW_PART) 1271 total_size += size; 1272 } 1273 } 1274 } 1275 } 1276 1277 /* Find out the total free space, excluding the boot block area. */ 1278 base_offset = BBSIZE / secsize; 1279 free_space = 0; 1280 for (i = 0; i < lp->d_npartitions; i++) { 1281 pp = &lp->d_partitions[i]; 1282 if (!part_set[i] || i == RAW_PART || 1283 part_size_type[i] == '%' || part_size_type[i] == '*') 1284 continue; 1285 if (pp->p_offset > base_offset) 1286 free_space += pp->p_offset - base_offset; 1287 if (pp->p_offset + pp->p_size > base_offset) 1288 base_offset = pp->p_offset + pp->p_size; 1289 } 1290 if (base_offset < lp->d_secperunit) 1291 free_space += lp->d_secperunit - base_offset; 1292 1293 /* handle % partitions - note %'s don't need to add up to 100! */ 1294 if (total_percent != 0) { 1295 if (total_percent > 100) { 1296 fprintf(stderr,"total percentage %lu is greater than 100\n", 1297 total_percent); 1298 errors++; 1299 } 1300 1301 if (free_space > 0) { 1302 for (i = 0; i < lp->d_npartitions; i++) { 1303 pp = &lp->d_partitions[i]; 1304 if (part_set[i] && part_size_type[i] == '%') { 1305 /* careful of overflows! and integer roundoff */ 1306 pp->p_size = ((double)pp->p_size/100) * free_space; 1307 total_size += pp->p_size; 1308 1309 /* FIX we can lose a sector or so due to roundoff per 1310 partition. A more complex algorithm could avoid that */ 1311 } 1312 } 1313 } else { 1314 fprintf(stderr, 1315 "%ld sectors available to give to '*' and '%%' partitions\n", 1316 free_space); 1317 errors++; 1318 /* fix? set all % partitions to size 0? */ 1319 } 1320 } 1321 /* give anything remaining to the hog partition */ 1322 if (hog_part != -1) { 1323 /* 1324 * Find the range of offsets usable by '*' partitions around 1325 * the hog partition and how much space they need. 1326 */ 1327 needed = 0; 1328 base_offset = BBSIZE / secsize; 1329 for (i = hog_part - 1; i >= 0; i--) { 1330 pp = &lp->d_partitions[i]; 1331 if (!part_set[i] || i == RAW_PART) 1332 continue; 1333 if (part_offset_type[i] == '*') { 1334 needed += pp->p_size; 1335 continue; 1336 } 1337 base_offset = pp->p_offset + pp->p_size; 1338 break; 1339 } 1340 current_offset = lp->d_secperunit; 1341 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1342 pp = &lp->d_partitions[i]; 1343 if (!part_set[i] || i == RAW_PART) 1344 continue; 1345 if (part_offset_type[i] == '*') { 1346 needed += pp->p_size; 1347 continue; 1348 } 1349 current_offset = pp->p_offset; 1350 } 1351 1352 if (current_offset - base_offset <= needed) { 1353 fprintf(stderr, "Cannot find space for partition %c\n", 1354 hog_part + 'a'); 1355 fprintf(stderr, 1356 "Need more than %lu sectors between %lu and %lu\n", 1357 needed, base_offset, current_offset); 1358 errors++; 1359 lp->d_partitions[hog_part].p_size = 0; 1360 } else { 1361 lp->d_partitions[hog_part].p_size = current_offset - 1362 base_offset - needed; 1363 total_size += lp->d_partitions[hog_part].p_size; 1364 } 1365 } 1366 1367 /* Now set the offsets for each partition */ 1368 current_offset = BBSIZE / secsize; /* in sectors */ 1369 seen_default_offset = 0; 1370 for (i = 0; i < lp->d_npartitions; i++) { 1371 part = 'a' + i; 1372 pp = &lp->d_partitions[i]; 1373 if (part_set[i]) { 1374 if (part_offset_type[i] == '*') { 1375 if (i == RAW_PART) { 1376 pp->p_offset = 0; 1377 } else { 1378 pp->p_offset = current_offset; 1379 seen_default_offset = 1; 1380 } 1381 } else { 1382 /* allow them to be out of order for old-style tables */ 1383 if (pp->p_offset < current_offset && 1384 seen_default_offset && i != RAW_PART && 1385 pp->p_fstype != FS_VINUM) { 1386 fprintf(stderr, 1387 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1388 (long)pp->p_offset,i+'a',current_offset); 1389 fprintf(stderr, 1390 "Labels with any *'s for offset must be in ascending order by sector\n"); 1391 errors++; 1392 } else if (pp->p_offset != current_offset && 1393 i != RAW_PART && seen_default_offset) { 1394 /* 1395 * this may give unneeded warnings if 1396 * partitions are out-of-order 1397 */ 1398 warnx( 1399 "Offset %ld for partition %c doesn't match expected value %ld", 1400 (long)pp->p_offset, i + 'a', current_offset); 1401 } 1402 } 1403 if (i != RAW_PART) 1404 current_offset = pp->p_offset + pp->p_size; 1405 } 1406 } 1407 1408 for (i = 0; i < lp->d_npartitions; i++) { 1409 part = 'a' + i; 1410 pp = &lp->d_partitions[i]; 1411 if (pp->p_size == 0 && pp->p_offset != 0) 1412 warnx("partition %c: size 0, but offset %lu", 1413 part, (u_long)pp->p_offset); 1414 #ifdef notdef 1415 if (pp->p_size % lp->d_secpercyl) 1416 warnx("partition %c: size %% cylinder-size != 0", 1417 part); 1418 if (pp->p_offset % lp->d_secpercyl) 1419 warnx("partition %c: offset %% cylinder-size != 0", 1420 part); 1421 #endif 1422 if (pp->p_offset > lp->d_secperunit) { 1423 fprintf(stderr, 1424 "partition %c: offset past end of unit\n", part); 1425 errors++; 1426 } 1427 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1428 fprintf(stderr, 1429 "partition %c: partition extends past end of unit\n", 1430 part); 1431 errors++; 1432 } 1433 if (i == RAW_PART) { 1434 if (pp->p_fstype != FS_UNUSED) 1435 warnx("partition %c is not marked as unused!",part); 1436 if (pp->p_offset != 0) 1437 warnx("partition %c doesn't start at 0!",part); 1438 if (pp->p_size != lp->d_secperunit) 1439 warnx("partition %c doesn't cover the whole unit!",part); 1440 1441 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1442 (pp->p_size != lp->d_secperunit)) { 1443 warnx("An incorrect partition %c may cause problems for " 1444 "standard system utilities",part); 1445 } 1446 } 1447 1448 /* check for overlaps */ 1449 /* this will check for all possible overlaps once and only once */ 1450 for (j = 0; j < i; j++) { 1451 pp2 = &lp->d_partitions[j]; 1452 if (j != RAW_PART && i != RAW_PART && 1453 pp->p_fstype != FS_VINUM && 1454 pp2->p_fstype != FS_VINUM && 1455 part_set[i] && part_set[j]) { 1456 if (pp2->p_offset < pp->p_offset + pp->p_size && 1457 (pp2->p_offset + pp2->p_size > pp->p_offset || 1458 pp2->p_offset >= pp->p_offset)) { 1459 fprintf(stderr,"partitions %c and %c overlap!\n", 1460 j + 'a', i + 'a'); 1461 errors++; 1462 } 1463 } 1464 } 1465 } 1466 for (; i < lp->d_npartitions; i++) { 1467 part = 'a' + i; 1468 pp = &lp->d_partitions[i]; 1469 if (pp->p_size || pp->p_offset) 1470 warnx("unused partition %c: size %d offset %lu", 1471 'a' + i, pp->p_size, (u_long)pp->p_offset); 1472 } 1473 return (errors); 1474 } 1475 1476 /* 1477 * When operating on a "virgin" disk, try getting an initial label 1478 * from the associated device driver. This might work for all device 1479 * drivers that are able to fetch some initial device parameters 1480 * without even having access to a (BSD) disklabel, like SCSI disks, 1481 * most IDE drives, or vn devices. 1482 * 1483 * The device name must be given in its "canonical" form. 1484 */ 1485 static struct disklabel * 1486 getvirginlabel(void) 1487 { 1488 static struct disklabel loclab; 1489 struct partition *dp; 1490 int f; 1491 u_int u; 1492 1493 if ((f = open(specname, O_RDONLY)) == -1) { 1494 warn("cannot open %s", specname); 1495 return (NULL); 1496 } 1497 1498 if (is_file) 1499 get_file_parms(f); 1500 else { 1501 mediasize = g_mediasize(f); 1502 secsize = g_sectorsize(f); 1503 if (secsize < 0 || mediasize < 0) { 1504 close (f); 1505 return (NULL); 1506 } 1507 } 1508 memset(&loclab, 0, sizeof loclab); 1509 loclab.d_magic = DISKMAGIC; 1510 loclab.d_magic2 = DISKMAGIC; 1511 loclab.d_secsize = secsize; 1512 loclab.d_secperunit = mediasize / secsize; 1513 1514 /* 1515 * Nobody in these enlightened days uses the CHS geometry for 1516 * anything, but nonetheless try to get it right. If we fail 1517 * to get any good ideas from the device, construct something 1518 * which is IBM-PC friendly. 1519 */ 1520 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1521 loclab.d_nsectors = u; 1522 else 1523 loclab.d_nsectors = 63; 1524 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1525 loclab.d_ntracks = u; 1526 else if (loclab.d_secperunit <= 63*1*1024) 1527 loclab.d_ntracks = 1; 1528 else if (loclab.d_secperunit <= 63*16*1024) 1529 loclab.d_ntracks = 16; 1530 else 1531 loclab.d_ntracks = 255; 1532 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1533 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1534 loclab.d_npartitions = DEFPARTITIONS; 1535 1536 /* Various (unneeded) compat stuff */ 1537 loclab.d_rpm = 3600; 1538 loclab.d_bbsize = BBSIZE; 1539 loclab.d_interleave = 1; 1540 strncpy(loclab.d_typename, "amnesiac", 1541 sizeof(loclab.d_typename)); 1542 1543 dp = &loclab.d_partitions[RAW_PART]; 1544 dp->p_size = loclab.d_secperunit; 1545 loclab.d_checksum = dkcksum(&loclab); 1546 close (f); 1547 return (&loclab); 1548 } 1549 1550 static void 1551 usage(void) 1552 { 1553 1554 fprintf(stderr, 1555 "%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", 1556 "usage: bsdlabel disk", 1557 "\t\t(to read label)", 1558 " bsdlabel -w [-n] [-m machine] disk [type]", 1559 "\t\t(to write label with existing boot program)", 1560 " bsdlabel -e [-n] [-m machine] disk", 1561 "\t\t(to edit label)", 1562 " bsdlabel -R [-n] [-m machine] disk protofile", 1563 "\t\t(to restore label with existing boot program)", 1564 " bsdlabel -B [-b boot] [-m machine] disk", 1565 "\t\t(to install boot program with existing on-disk label)", 1566 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1567 "\t\t(to write label and install boot program)", 1568 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1569 "\t\t(to restore label and install boot program)" 1570 ); 1571 exit(1); 1572 } 1573