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, "ia64") || 169 !strcmp(optarg, "pc98")) { 170 labelsoffset = 1; 171 labeloffset = 0; 172 bbsize = 8192; 173 } else { 174 errx(1, "Unsupported architecture"); 175 } 176 break; 177 case 'n': 178 disable_write = 1; 179 break; 180 case 'R': 181 if (op != UNSPEC) 182 usage(); 183 op = RESTORE; 184 break; 185 case 'e': 186 if (op != UNSPEC) 187 usage(); 188 op = EDIT; 189 break; 190 case 'r': 191 /* 192 * We accept and ignode -r for compatibility with 193 * historically disklabel usage. 194 */ 195 break; 196 case 'w': 197 if (op != UNSPEC) 198 usage(); 199 op = WRITE; 200 break; 201 case '?': 202 default: 203 usage(); 204 } 205 argc -= optind; 206 argv += optind; 207 208 if (argc < 1) 209 usage(); 210 if (labelsoffset < 0 || labeloffset < 0) 211 errx(1, "a -m <architecture> option must be specified"); 212 213 /* Figure out the names of the thing we're working on */ 214 if (is_file) { 215 specname = argv[0]; 216 } else { 217 specname = g_device_path(argv[0]); 218 if (specname == NULL) { 219 warn("unable to get correct path for %s", argv[0]); 220 return(1); 221 } 222 fd = open(specname, O_RDONLY); 223 if (fd < 0) { 224 warn("error opening %s", specname); 225 return(1); 226 } 227 pname = g_providername(fd); 228 if (pname == NULL) { 229 warn("error getting providername for %s", specname); 230 close(fd); 231 return(1); 232 } 233 close(fd); 234 } 235 236 if (installboot && op == UNSPEC) 237 op = WRITEBOOT; 238 else if (op == UNSPEC) 239 op = READ; 240 241 switch(op) { 242 243 case UNSPEC: 244 break; 245 246 case EDIT: 247 if (argc != 1) 248 usage(); 249 readlabel(1); 250 fixlabel(&lab); 251 error = edit(); 252 break; 253 254 case READ: 255 if (argc != 1) 256 usage(); 257 readlabel(1); 258 display(stdout, NULL); 259 error = checklabel(NULL); 260 break; 261 262 case RESTORE: 263 if (argc != 2) 264 usage(); 265 if (!(t = fopen(argv[1], "r"))) 266 err(4, "fopen %s", argv[1]); 267 readlabel(0); 268 if (!getasciilabel(t, &lab)) 269 exit(1); 270 error = writelabel(); 271 break; 272 273 case WRITE: 274 if (argc == 2) 275 name = argv[1]; 276 else if (argc == 1) 277 name = "auto"; 278 else 279 usage(); 280 readlabel(0); 281 makelabel(name, &lab); 282 fixlabel(&lab); 283 if (checklabel(NULL) == 0) 284 error = writelabel(); 285 break; 286 287 case WRITEBOOT: 288 289 readlabel(1); 290 fixlabel(&lab); 291 if (argc == 2) 292 makelabel(argv[1], &lab); 293 if (checklabel(NULL) == 0) 294 error = writelabel(); 295 break; 296 } 297 exit(error); 298 } 299 300 static void 301 fixlabel(struct disklabel *lp) 302 { 303 struct partition *dp; 304 int i; 305 306 for (i = 0; i < lp->d_npartitions; i++) { 307 if (i == RAW_PART) 308 continue; 309 if (lp->d_partitions[i].p_size) 310 return; 311 } 312 313 dp = &lp->d_partitions[0]; 314 dp->p_offset = BBSIZE / secsize; 315 dp->p_size = lp->d_secperunit - dp->p_offset; 316 } 317 318 /* 319 * Construct a prototype disklabel from /etc/disktab. 320 */ 321 static void 322 makelabel(const char *type, struct disklabel *lp) 323 { 324 struct disklabel *dp; 325 326 if (strcmp(type, "auto") == 0) 327 dp = getvirginlabel(); 328 else 329 dp = getdiskbyname(type); 330 if (dp == NULL) 331 errx(1, "%s: unknown disk type", type); 332 *lp = *dp; 333 bzero(lp->d_packname, sizeof(lp->d_packname)); 334 } 335 336 static void 337 readboot(void) 338 { 339 int fd; 340 struct stat st; 341 342 if (xxboot == NULL) 343 xxboot = "/boot/boot"; 344 fd = open(xxboot, O_RDONLY); 345 if (fd < 0) 346 err(1, "cannot open %s", xxboot); 347 fstat(fd, &st); 348 if (st.st_size <= BBSIZE) { 349 if (read(fd, bootarea, st.st_size) != st.st_size) 350 err(1, "read error %s", xxboot); 351 close(fd); 352 return; 353 } 354 errx(1, "boot code %s is wrong size", xxboot); 355 } 356 357 static int 358 geom_class_available(const char *name) 359 { 360 struct gclass *class; 361 struct gmesh mesh; 362 int error; 363 364 error = geom_gettree(&mesh); 365 if (error != 0) 366 errc(1, error, "Cannot get GEOM tree"); 367 368 LIST_FOREACH(class, &mesh.lg_class, lg_class) { 369 if (strcmp(class->lg_name, name) == 0) { 370 geom_deletetree(&mesh); 371 return (1); 372 } 373 } 374 375 geom_deletetree(&mesh); 376 377 return (0); 378 } 379 380 static int 381 writelabel(void) 382 { 383 int i, fd, serrno; 384 struct gctl_req *grq; 385 char const *errstr; 386 struct disklabel *lp = &lab; 387 388 if (disable_write) { 389 warnx("write to disk label supressed - label was as follows:"); 390 display(stdout, NULL); 391 return (0); 392 } 393 394 lp->d_magic = DISKMAGIC; 395 lp->d_magic2 = DISKMAGIC; 396 lp->d_checksum = 0; 397 lp->d_checksum = dkcksum(lp); 398 if (installboot) 399 readboot(); 400 for (i = 0; i < lab.d_npartitions; i++) 401 if (lab.d_partitions[i].p_size) 402 lab.d_partitions[i].p_offset += lba_offset; 403 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 404 lp); 405 406 fd = open(specname, O_RDWR); 407 if (fd < 0) { 408 if (is_file) { 409 warn("cannot open file %s for writing label", specname); 410 return(1); 411 } else 412 serrno = errno; 413 414 if (geom_class_available("PART") != 0) { 415 /* 416 * Since we weren't able open provider for 417 * writing, then recommend user to use gpart(8). 418 */ 419 warnc(serrno, 420 "cannot open provider %s for writing label", 421 specname); 422 warnx("Try to use gpart(8)."); 423 return (1); 424 } 425 426 /* Give up if GEOM_BSD is not available. */ 427 if (geom_class_available("BSD") == 0) { 428 warnc(serrno, "%s", specname); 429 return (1); 430 } 431 432 grq = gctl_get_handle(); 433 gctl_ro_param(grq, "verb", -1, "write label"); 434 gctl_ro_param(grq, "class", -1, "BSD"); 435 gctl_ro_param(grq, "geom", -1, pname); 436 gctl_ro_param(grq, "label", 148+16*8, 437 bootarea + labeloffset + labelsoffset * secsize); 438 errstr = gctl_issue(grq); 439 if (errstr != NULL) { 440 warnx("%s", errstr); 441 gctl_free(grq); 442 return(1); 443 } 444 gctl_free(grq); 445 if (installboot) { 446 grq = gctl_get_handle(); 447 gctl_ro_param(grq, "verb", -1, "write bootcode"); 448 gctl_ro_param(grq, "class", -1, "BSD"); 449 gctl_ro_param(grq, "geom", -1, pname); 450 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 451 errstr = gctl_issue(grq); 452 if (errstr != NULL) { 453 warnx("%s", errstr); 454 gctl_free(grq); 455 return (1); 456 } 457 gctl_free(grq); 458 } 459 } else { 460 if (write(fd, bootarea, bbsize) != bbsize) { 461 warn("write %s", specname); 462 close (fd); 463 return (1); 464 } 465 close (fd); 466 } 467 return (0); 468 } 469 470 static void 471 get_file_parms(int f) 472 { 473 int i; 474 struct stat sb; 475 476 if (fstat(f, &sb) != 0) 477 err(4, "fstat failed"); 478 i = sb.st_mode & S_IFMT; 479 if (i != S_IFREG && i != S_IFLNK) 480 errx(4, "%s is not a valid file or link", specname); 481 secsize = DEV_BSIZE; 482 mediasize = sb.st_size; 483 } 484 485 /* 486 * Fetch disklabel for disk. 487 */ 488 static int 489 readlabel(int flag) 490 { 491 ssize_t nbytes; 492 uint32_t lba; 493 int f, i; 494 int error; 495 496 f = open(specname, O_RDONLY); 497 if (f < 0) 498 err(1, "%s", specname); 499 if (is_file) 500 get_file_parms(f); 501 else { 502 mediasize = g_mediasize(f); 503 secsize = g_sectorsize(f); 504 if (secsize < 0 || mediasize < 0) 505 err(4, "cannot get disk geometry"); 506 } 507 if (mediasize > (off_t)0xffffffff * secsize) 508 errx(1, 509 "disks with more than 2^32-1 sectors are not supported"); 510 (void)lseek(f, (off_t)0, SEEK_SET); 511 nbytes = read(f, bootarea, BBSIZE); 512 if (nbytes == -1) 513 err(4, "%s read", specname); 514 if (nbytes != BBSIZE) 515 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 516 close (f); 517 error = bsd_disklabel_le_dec( 518 bootarea + (labeloffset + labelsoffset * secsize), 519 &lab, MAXPARTITIONS); 520 if (flag && error) 521 errx(1, "%s: no valid label found", specname); 522 523 if (is_file) 524 return(0); 525 526 /* 527 * Compensate for absolute block addressing by finding the 528 * smallest partition offset and if the offset of the 'c' 529 * partition is equal to that, subtract it from all offsets. 530 */ 531 lba = ~0; 532 for (i = 0; i < lab.d_npartitions; i++) { 533 if (lab.d_partitions[i].p_size) 534 lba = MIN(lba, lab.d_partitions[i].p_offset); 535 } 536 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 537 for (i = 0; i < lab.d_npartitions; i++) { 538 if (lab.d_partitions[i].p_size) 539 lab.d_partitions[i].p_offset -= lba; 540 } 541 /* 542 * Save the offset so that we can write the label 543 * back with absolute block addresses. 544 */ 545 lba_offset = lba; 546 } 547 return (error); 548 } 549 550 551 static void 552 display(FILE *f, const struct disklabel *lp) 553 { 554 int i, j; 555 const struct partition *pp; 556 557 if (lp == NULL) 558 lp = &lab; 559 560 fprintf(f, "# %s:\n", specname); 561 if (allfields) { 562 if (lp->d_type < DKMAXTYPES) 563 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 564 else 565 fprintf(f, "type: %u\n", lp->d_type); 566 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 567 lp->d_typename); 568 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 569 lp->d_packname); 570 fprintf(f, "flags:"); 571 if (lp->d_flags & D_REMOVABLE) 572 fprintf(f, " removeable"); 573 if (lp->d_flags & D_ECC) 574 fprintf(f, " ecc"); 575 if (lp->d_flags & D_BADSECT) 576 fprintf(f, " badsect"); 577 fprintf(f, "\n"); 578 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 579 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 580 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 581 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 582 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 583 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 584 fprintf(f, "rpm: %u\n", lp->d_rpm); 585 fprintf(f, "interleave: %u\n", lp->d_interleave); 586 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 587 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 588 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 589 (u_long)lp->d_headswitch); 590 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 591 (u_long)lp->d_trkseek); 592 fprintf(f, "drivedata: "); 593 for (i = NDDATA - 1; i >= 0; i--) 594 if (lp->d_drivedata[i]) 595 break; 596 if (i < 0) 597 i = 0; 598 for (j = 0; j <= i; j++) 599 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 600 fprintf(f, "\n\n"); 601 } 602 fprintf(f, "%u partitions:\n", lp->d_npartitions); 603 fprintf(f, 604 "# size offset fstype [fsize bsize bps/cpg]\n"); 605 pp = lp->d_partitions; 606 for (i = 0; i < lp->d_npartitions; i++, pp++) { 607 if (pp->p_size) { 608 fprintf(f, " %c: %10lu %10lu ", 'a' + i, 609 (u_long)pp->p_size, (u_long)pp->p_offset); 610 if (pp->p_fstype < FSMAXTYPES) 611 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 612 else 613 fprintf(f, "%8d", pp->p_fstype); 614 switch (pp->p_fstype) { 615 616 case FS_UNUSED: /* XXX */ 617 fprintf(f, " %5lu %5lu %2s", 618 (u_long)pp->p_fsize, 619 (u_long)(pp->p_fsize * pp->p_frag), ""); 620 break; 621 622 case FS_BSDFFS: 623 fprintf(f, " %5lu %5lu %5u", 624 (u_long)pp->p_fsize, 625 (u_long)(pp->p_fsize * pp->p_frag), 626 pp->p_cpg); 627 break; 628 629 case FS_BSDLFS: 630 fprintf(f, " %5lu %5lu %5d", 631 (u_long)pp->p_fsize, 632 (u_long)(pp->p_fsize * pp->p_frag), 633 pp->p_cpg); 634 break; 635 636 default: 637 fprintf(f, "%20.20s", ""); 638 break; 639 } 640 if (i == RAW_PART) { 641 fprintf(f, " # \"raw\" part, don't edit"); 642 } 643 fprintf(f, "\n"); 644 } 645 } 646 fflush(f); 647 } 648 649 static int 650 edit(void) 651 { 652 int c, fd; 653 struct disklabel label; 654 FILE *fp; 655 656 if ((fd = mkstemp(tmpfil)) == -1 || 657 (fp = fdopen(fd, "w")) == NULL) { 658 warnx("can't create %s", tmpfil); 659 return (1); 660 } 661 display(fp, NULL); 662 fclose(fp); 663 for (;;) { 664 if (!editit()) 665 break; 666 fp = fopen(tmpfil, "r"); 667 if (fp == NULL) { 668 warnx("can't reopen %s for reading", tmpfil); 669 break; 670 } 671 bzero((char *)&label, sizeof(label)); 672 c = getasciilabel(fp, &label); 673 fclose(fp); 674 if (c) { 675 lab = label; 676 if (writelabel() == 0) { 677 (void) unlink(tmpfil); 678 return (0); 679 } 680 } 681 printf("re-edit the label? [y]: "); 682 fflush(stdout); 683 c = getchar(); 684 if (c != EOF && c != (int)'\n') 685 while (getchar() != (int)'\n') 686 ; 687 if (c == (int)'n') 688 break; 689 } 690 (void) unlink(tmpfil); 691 return (1); 692 } 693 694 static int 695 editit(void) 696 { 697 int pid, xpid; 698 int locstat, omask; 699 const char *ed; 700 uid_t uid; 701 gid_t gid; 702 703 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 704 while ((pid = fork()) < 0) { 705 if (errno == EPROCLIM) { 706 warnx("you have too many processes"); 707 return(0); 708 } 709 if (errno != EAGAIN) { 710 warn("fork"); 711 return(0); 712 } 713 sleep(1); 714 } 715 if (pid == 0) { 716 sigsetmask(omask); 717 gid = getgid(); 718 if (setresgid(gid, gid, gid) == -1) 719 err(1, "setresgid"); 720 uid = getuid(); 721 if (setresuid(uid, uid, uid) == -1) 722 err(1, "setresuid"); 723 if ((ed = getenv("EDITOR")) == (char *)0) 724 ed = DEFEDITOR; 725 execlp(ed, ed, tmpfil, (char *)0); 726 err(1, "%s", ed); 727 } 728 while ((xpid = wait(&locstat)) >= 0) 729 if (xpid == pid) 730 break; 731 sigsetmask(omask); 732 return(!locstat); 733 } 734 735 static char * 736 skip(char *cp) 737 { 738 739 while (*cp != '\0' && isspace(*cp)) 740 cp++; 741 if (*cp == '\0' || *cp == '#') 742 return (NULL); 743 return (cp); 744 } 745 746 static char * 747 word(char *cp) 748 { 749 char c; 750 751 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 752 cp++; 753 if ((c = *cp) != '\0') { 754 *cp++ = '\0'; 755 if (c != '#') 756 return (skip(cp)); 757 } 758 return (NULL); 759 } 760 761 /* 762 * Read an ascii label in from fd f, 763 * in the same format as that put out by display(), 764 * and fill in lp. 765 */ 766 static int 767 getasciilabel(FILE *f, struct disklabel *lp) 768 { 769 char *cp, *endp; 770 const char **cpp; 771 u_int part; 772 char *tp, line[BUFSIZ]; 773 u_long v; 774 int lineno = 0, errors = 0; 775 int i; 776 777 makelabel("auto", lp); 778 bzero(&part_set, sizeof(part_set)); 779 bzero(&part_size_type, sizeof(part_size_type)); 780 bzero(&part_offset_type, sizeof(part_offset_type)); 781 lp->d_bbsize = BBSIZE; /* XXX */ 782 lp->d_sbsize = 0; /* XXX */ 783 while (fgets(line, sizeof(line) - 1, f)) { 784 lineno++; 785 if ((cp = index(line,'\n')) != 0) 786 *cp = '\0'; 787 cp = skip(line); 788 if (cp == NULL) 789 continue; 790 tp = index(cp, ':'); 791 if (tp == NULL) { 792 fprintf(stderr, "line %d: syntax error\n", lineno); 793 errors++; 794 continue; 795 } 796 *tp++ = '\0', tp = skip(tp); 797 if (!strcmp(cp, "type")) { 798 if (tp == NULL) 799 tp = unknown; 800 cpp = dktypenames; 801 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 802 if (*cpp && !strcmp(*cpp, tp)) { 803 lp->d_type = cpp - dktypenames; 804 break; 805 } 806 if (cpp < &dktypenames[DKMAXTYPES]) 807 continue; 808 errno = 0; 809 v = strtoul(tp, &endp, 10); 810 if (errno != 0 || *endp != '\0') 811 v = DKMAXTYPES; 812 if (v >= DKMAXTYPES) 813 fprintf(stderr, "line %d:%s %lu\n", lineno, 814 "Warning, unknown disk type", v); 815 else 816 lp->d_type = v; 817 continue; 818 } 819 if (!strcmp(cp, "flags")) { 820 for (v = 0; (cp = tp) && *cp != '\0';) { 821 tp = word(cp); 822 if (!strcmp(cp, "removeable")) 823 v |= D_REMOVABLE; 824 else if (!strcmp(cp, "ecc")) 825 v |= D_ECC; 826 else if (!strcmp(cp, "badsect")) 827 v |= D_BADSECT; 828 else { 829 fprintf(stderr, 830 "line %d: %s: bad flag\n", 831 lineno, cp); 832 errors++; 833 } 834 } 835 lp->d_flags = v; 836 continue; 837 } 838 if (!strcmp(cp, "drivedata")) { 839 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 840 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 841 tp = word(cp); 842 } 843 continue; 844 } 845 if (sscanf(cp, "%lu partitions", &v) == 1) { 846 if (v > MAXPARTITIONS) { 847 fprintf(stderr, 848 "line %d: bad # of partitions\n", lineno); 849 lp->d_npartitions = MAXPARTITIONS; 850 errors++; 851 } else if (v < DEFPARTITIONS) { 852 fprintf(stderr, 853 "line %d: bad # of partitions\n", lineno); 854 lp->d_npartitions = DEFPARTITIONS; 855 errors++; 856 } else 857 lp->d_npartitions = v; 858 continue; 859 } 860 if (tp == NULL) 861 tp = blank; 862 if (!strcmp(cp, "disk")) { 863 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 864 continue; 865 } 866 if (!strcmp(cp, "label")) { 867 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 868 continue; 869 } 870 if (!strcmp(cp, "bytes/sector")) { 871 v = strtoul(tp, NULL, 10); 872 if (v == 0 || (v % DEV_BSIZE) != 0) { 873 fprintf(stderr, 874 "line %d: %s: bad sector size\n", 875 lineno, tp); 876 errors++; 877 } else 878 lp->d_secsize = v; 879 continue; 880 } 881 if (!strcmp(cp, "sectors/track")) { 882 v = strtoul(tp, NULL, 10); 883 #if (ULONG_MAX != 0xffffffffUL) 884 if (v == 0 || v > 0xffffffff) 885 #else 886 if (v == 0) 887 #endif 888 { 889 fprintf(stderr, "line %d: %s: bad %s\n", 890 lineno, tp, cp); 891 errors++; 892 } else 893 lp->d_nsectors = v; 894 continue; 895 } 896 if (!strcmp(cp, "sectors/cylinder")) { 897 v = strtoul(tp, NULL, 10); 898 if (v == 0) { 899 fprintf(stderr, "line %d: %s: bad %s\n", 900 lineno, tp, cp); 901 errors++; 902 } else 903 lp->d_secpercyl = v; 904 continue; 905 } 906 if (!strcmp(cp, "tracks/cylinder")) { 907 v = strtoul(tp, NULL, 10); 908 if (v == 0) { 909 fprintf(stderr, "line %d: %s: bad %s\n", 910 lineno, tp, cp); 911 errors++; 912 } else 913 lp->d_ntracks = v; 914 continue; 915 } 916 if (!strcmp(cp, "cylinders")) { 917 v = strtoul(tp, NULL, 10); 918 if (v == 0) { 919 fprintf(stderr, "line %d: %s: bad %s\n", 920 lineno, tp, cp); 921 errors++; 922 } else 923 lp->d_ncylinders = v; 924 continue; 925 } 926 if (!strcmp(cp, "sectors/unit")) { 927 v = strtoul(tp, NULL, 10); 928 if (v == 0) { 929 fprintf(stderr, "line %d: %s: bad %s\n", 930 lineno, tp, cp); 931 errors++; 932 } else 933 lp->d_secperunit = v; 934 continue; 935 } 936 if (!strcmp(cp, "rpm")) { 937 v = strtoul(tp, NULL, 10); 938 if (v == 0 || v > USHRT_MAX) { 939 fprintf(stderr, "line %d: %s: bad %s\n", 940 lineno, tp, cp); 941 errors++; 942 } else 943 lp->d_rpm = v; 944 continue; 945 } 946 if (!strcmp(cp, "interleave")) { 947 v = strtoul(tp, NULL, 10); 948 if (v == 0 || v > USHRT_MAX) { 949 fprintf(stderr, "line %d: %s: bad %s\n", 950 lineno, tp, cp); 951 errors++; 952 } else 953 lp->d_interleave = v; 954 continue; 955 } 956 if (!strcmp(cp, "trackskew")) { 957 v = strtoul(tp, NULL, 10); 958 if (v > USHRT_MAX) { 959 fprintf(stderr, "line %d: %s: bad %s\n", 960 lineno, tp, cp); 961 errors++; 962 } else 963 lp->d_trackskew = v; 964 continue; 965 } 966 if (!strcmp(cp, "cylinderskew")) { 967 v = strtoul(tp, NULL, 10); 968 if (v > USHRT_MAX) { 969 fprintf(stderr, "line %d: %s: bad %s\n", 970 lineno, tp, cp); 971 errors++; 972 } else 973 lp->d_cylskew = v; 974 continue; 975 } 976 if (!strcmp(cp, "headswitch")) { 977 v = strtoul(tp, NULL, 10); 978 lp->d_headswitch = v; 979 continue; 980 } 981 if (!strcmp(cp, "track-to-track seek")) { 982 v = strtoul(tp, NULL, 10); 983 lp->d_trkseek = v; 984 continue; 985 } 986 /* the ':' was removed above */ 987 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 988 fprintf(stderr, 989 "line %d: %s: Unknown disklabel field\n", lineno, 990 cp); 991 errors++; 992 continue; 993 } 994 995 /* Process a partition specification line. */ 996 part = *cp - 'a'; 997 if (part >= lp->d_npartitions) { 998 fprintf(stderr, 999 "line %d: partition name out of range a-%c: %s\n", 1000 lineno, 'a' + lp->d_npartitions - 1, cp); 1001 errors++; 1002 continue; 1003 } 1004 part_set[part] = 1; 1005 1006 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1007 errors++; 1008 break; 1009 } 1010 } 1011 errors += checklabel(lp); 1012 return (errors == 0); 1013 } 1014 1015 #define NXTNUM(n) do { \ 1016 if (tp == NULL) { \ 1017 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1018 return (1); \ 1019 } else { \ 1020 cp = tp, tp = word(cp); \ 1021 (n) = strtoul(cp, NULL, 10); \ 1022 } \ 1023 } while (0) 1024 1025 /* retain 1 character following number */ 1026 #define NXTWORD(w,n) do { \ 1027 if (tp == NULL) { \ 1028 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1029 return (1); \ 1030 } else { \ 1031 char *tmp; \ 1032 cp = tp, tp = word(cp); \ 1033 (n) = strtoul(cp, &tmp, 10); \ 1034 if (tmp) (w) = *tmp; \ 1035 } \ 1036 } while (0) 1037 1038 /* 1039 * Read a partition line into partition `part' in the specified disklabel. 1040 * Return 0 on success, 1 on failure. 1041 */ 1042 static int 1043 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1044 { 1045 struct partition *pp; 1046 char *cp, *endp; 1047 const char **cpp; 1048 u_long v; 1049 1050 pp = &lp->d_partitions[part]; 1051 cp = NULL; 1052 1053 v = 0; 1054 NXTWORD(part_size_type[part],v); 1055 if (v == 0 && part_size_type[part] != '*') { 1056 fprintf(stderr, 1057 "line %d: %s: bad partition size\n", lineno, cp); 1058 return (1); 1059 } 1060 pp->p_size = v; 1061 1062 v = 0; 1063 NXTWORD(part_offset_type[part],v); 1064 if (v == 0 && part_offset_type[part] != '*' && 1065 part_offset_type[part] != '\0') { 1066 fprintf(stderr, 1067 "line %d: %s: bad partition offset\n", lineno, cp); 1068 return (1); 1069 } 1070 pp->p_offset = v; 1071 if (tp == NULL) { 1072 fprintf(stderr, "line %d: missing file system type\n", lineno); 1073 return (1); 1074 } 1075 cp = tp, tp = word(cp); 1076 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1077 if (*cpp && !strcmp(*cpp, cp)) 1078 break; 1079 if (*cpp != NULL) { 1080 pp->p_fstype = cpp - fstypenames; 1081 } else { 1082 if (isdigit(*cp)) { 1083 errno = 0; 1084 v = strtoul(cp, &endp, 10); 1085 if (errno != 0 || *endp != '\0') 1086 v = FSMAXTYPES; 1087 } else 1088 v = FSMAXTYPES; 1089 if (v >= FSMAXTYPES) { 1090 fprintf(stderr, 1091 "line %d: Warning, unknown file system type %s\n", 1092 lineno, cp); 1093 v = FS_UNUSED; 1094 } 1095 pp->p_fstype = v; 1096 } 1097 1098 switch (pp->p_fstype) { 1099 case FS_UNUSED: 1100 case FS_BSDFFS: 1101 case FS_BSDLFS: 1102 /* accept defaults for fsize/frag/cpg */ 1103 if (tp) { 1104 NXTNUM(pp->p_fsize); 1105 if (pp->p_fsize == 0) 1106 break; 1107 NXTNUM(v); 1108 pp->p_frag = v / pp->p_fsize; 1109 if (tp != NULL) 1110 NXTNUM(pp->p_cpg); 1111 } 1112 /* else default to 0's */ 1113 break; 1114 default: 1115 break; 1116 } 1117 return (0); 1118 } 1119 1120 /* 1121 * Check disklabel for errors and fill in 1122 * derived fields according to supplied values. 1123 */ 1124 static int 1125 checklabel(struct disklabel *lp) 1126 { 1127 struct partition *pp; 1128 int i, errors = 0; 1129 char part; 1130 u_long base_offset, needed, total_size, total_percent, current_offset; 1131 long free_space; 1132 int seen_default_offset; 1133 int hog_part; 1134 int j; 1135 struct partition *pp2; 1136 1137 if (lp == NULL) 1138 lp = &lab; 1139 1140 if (allfields) { 1141 1142 if (lp->d_secsize == 0) { 1143 fprintf(stderr, "sector size 0\n"); 1144 return (1); 1145 } 1146 if (lp->d_nsectors == 0) { 1147 fprintf(stderr, "sectors/track 0\n"); 1148 return (1); 1149 } 1150 if (lp->d_ntracks == 0) { 1151 fprintf(stderr, "tracks/cylinder 0\n"); 1152 return (1); 1153 } 1154 if (lp->d_ncylinders == 0) { 1155 fprintf(stderr, "cylinders/unit 0\n"); 1156 errors++; 1157 } 1158 if (lp->d_rpm == 0) 1159 warnx("revolutions/minute 0"); 1160 if (lp->d_secpercyl == 0) 1161 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1162 if (lp->d_secperunit == 0) 1163 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1164 if (lp->d_bbsize == 0) { 1165 fprintf(stderr, "boot block size 0\n"); 1166 errors++; 1167 } else if (lp->d_bbsize % lp->d_secsize) 1168 warnx("boot block size %% sector-size != 0"); 1169 if (lp->d_npartitions > MAXPARTITIONS) { 1170 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1171 (u_long)lp->d_npartitions, MAXPARTITIONS); 1172 errors++; 1173 } 1174 if (lp->d_npartitions < DEFPARTITIONS) { 1175 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)", 1176 (u_long)lp->d_npartitions, DEFPARTITIONS); 1177 errors++; 1178 } 1179 } else { 1180 struct disklabel *vl; 1181 1182 vl = getvirginlabel(); 1183 if (lp->d_secsize == 0) 1184 lp->d_secsize = vl->d_secsize; 1185 if (lp->d_nsectors == 0) 1186 lp->d_nsectors = vl->d_nsectors; 1187 if (lp->d_ntracks == 0) 1188 lp->d_ntracks = vl->d_ntracks; 1189 if (lp->d_ncylinders == 0) 1190 lp->d_ncylinders = vl->d_ncylinders; 1191 if (lp->d_rpm == 0) 1192 lp->d_rpm = vl->d_rpm; 1193 if (lp->d_interleave == 0) 1194 lp->d_interleave = vl->d_interleave; 1195 if (lp->d_secpercyl == 0) 1196 lp->d_secpercyl = vl->d_secpercyl; 1197 if (lp->d_secperunit == 0) 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 enligthened days uses the CHS geometry for 1516 * anything, but nontheless 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