1 /* 2 * Copyright (c) 1994, 1995 Gordon W. Ross 3 * Copyright (c) 1994 Theo de Raadt 4 * All rights reserved. 5 * Copyright (c) 1987, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Symmetric Computer Systems. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * This product includes software developed by Theo de Raadt. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $ 41 */ 42 43 #if 0 44 #ifndef lint 45 static const char copyright[] = 46 "@(#) Copyright (c) 1987, 1993\n\ 47 The Regents of the University of California. All rights reserved.\n"; 48 #endif /* not lint */ 49 50 #ifndef lint 51 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94"; 52 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ 53 #endif /* not lint */ 54 #endif 55 #include <sys/cdefs.h> 56 __FBSDID("$FreeBSD$"); 57 58 #include <sys/param.h> 59 #include <stdint.h> 60 #include <sys/file.h> 61 #include <sys/stat.h> 62 #include <sys/wait.h> 63 #include <sys/disk.h> 64 #define DKTYPENAMES 65 #define FSTYPENAMES 66 #define MAXPARTITIONS 26 67 #include <sys/disklabel.h> 68 69 #include <unistd.h> 70 #include <string.h> 71 #include <stdio.h> 72 #include <libgeom.h> 73 #include <stdlib.h> 74 #include <signal.h> 75 #include <stdarg.h> 76 #include <ctype.h> 77 #include <err.h> 78 #include <errno.h> 79 80 #include "pathnames.h" 81 82 static void makelabel(const char *, struct disklabel *); 83 static int writelabel(void); 84 static int readlabel(int flag); 85 static void display(FILE *, const struct disklabel *); 86 static int edit(void); 87 static int editit(void); 88 static void fixlabel(struct disklabel *); 89 static char *skip(char *); 90 static char *word(char *); 91 static int getasciilabel(FILE *, struct disklabel *); 92 static int getasciipartspec(char *, struct disklabel *, int, int); 93 static int checklabel(struct disklabel *); 94 static void usage(void); 95 static struct disklabel *getvirginlabel(void); 96 97 #define DEFEDITOR _PATH_VI 98 #define DEFPARTITIONS 8 99 100 static char *specname; 101 static char *pname; 102 static char tmpfil[] = PATH_TMPFILE; 103 104 static struct disklabel lab; 105 static u_char bootarea[BBSIZE]; 106 static off_t mediasize; 107 static u_int secsize; 108 static char blank[] = ""; 109 static char unknown[] = "unknown"; 110 111 #define MAX_PART ('z') 112 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 113 static char part_size_type[MAX_NUM_PARTS]; 114 static char part_offset_type[MAX_NUM_PARTS]; 115 static int part_set[MAX_NUM_PARTS]; 116 117 static int installboot; /* non-zero if we should install a boot program */ 118 static int allfields; /* present all fields in edit */ 119 static char const *xxboot; /* primary boot */ 120 121 static uint32_t lba_offset; 122 #ifndef LABELSECTOR 123 #define LABELSECTOR -1 124 #endif 125 #ifndef LABELOFFSET 126 #define LABELOFFSET -1 127 #endif 128 static int labelsoffset = LABELSECTOR; 129 static int labeloffset = LABELOFFSET; 130 static int bbsize = BBSIZE; 131 static int alphacksum = 132 #if defined(__alpha__) 133 1; 134 #else 135 0; 136 #endif 137 138 enum { 139 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 140 } op = UNSPEC; 141 142 143 static int disable_write; /* set to disable writing to disk label */ 144 static int is_file; /* work on a file (abs. pathname), "-f" opt. */ 145 146 int 147 main(int argc, char *argv[]) 148 { 149 FILE *t; 150 int ch, error, fd; 151 const char *name; 152 153 error = 0; 154 name = NULL; 155 156 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1) 157 switch (ch) { 158 case 'A': 159 allfields = 1; 160 break; 161 case 'B': 162 ++installboot; 163 break; 164 case 'b': 165 xxboot = optarg; 166 break; 167 case 'f': 168 is_file=1; 169 break; 170 case 'm': 171 if (!strcmp(optarg, "i386") || 172 !strcmp(optarg, "amd64") || 173 !strcmp(optarg, "ia64") || 174 !strcmp(optarg, "pc98")) { 175 labelsoffset = 1; 176 labeloffset = 0; 177 bbsize = 8192; 178 alphacksum = 0; 179 } else if (!strcmp(optarg, "alpha")) { 180 labelsoffset = 0; 181 labeloffset = 64; 182 bbsize = 8192; 183 alphacksum = 1; 184 } else { 185 errx(1, "Unsupported architecture"); 186 } 187 break; 188 case 'n': 189 disable_write = 1; 190 break; 191 case 'R': 192 if (op != UNSPEC) 193 usage(); 194 op = RESTORE; 195 break; 196 case 'e': 197 if (op != UNSPEC) 198 usage(); 199 op = EDIT; 200 break; 201 case 'r': 202 /* 203 * We accept and ignode -r for compatibility with 204 * historically disklabel usage. 205 */ 206 break; 207 case 'w': 208 if (op != UNSPEC) 209 usage(); 210 op = WRITE; 211 break; 212 case '?': 213 default: 214 usage(); 215 } 216 argc -= optind; 217 argv += optind; 218 219 if (argc < 1) 220 usage(); 221 if (labelsoffset < 0 || labeloffset < 0) 222 errx(1, "a -m <architecture> option must be specified"); 223 224 /* Figure out the names of the thing we're working on */ 225 if (is_file) { 226 specname = argv[0]; 227 } else { 228 specname = g_device_path(argv[0]); 229 if (specname == NULL) { 230 warn("unable to get correct path for %s", argv[0]); 231 return(1); 232 } 233 fd = open(specname, O_RDONLY); 234 if (fd < 0) { 235 warn("error opening %s", specname); 236 return(1); 237 } 238 pname = g_providername(fd); 239 if (pname == NULL) { 240 warn("error getting providername for %s", specname); 241 close(fd); 242 return(1); 243 } 244 close(fd); 245 } 246 247 if (installboot && op == UNSPEC) 248 op = WRITEBOOT; 249 else if (op == UNSPEC) 250 op = READ; 251 252 switch(op) { 253 254 case UNSPEC: 255 break; 256 257 case EDIT: 258 if (argc != 1) 259 usage(); 260 readlabel(1); 261 fixlabel(&lab); 262 error = edit(); 263 break; 264 265 case READ: 266 if (argc != 1) 267 usage(); 268 readlabel(1); 269 display(stdout, NULL); 270 error = checklabel(NULL); 271 break; 272 273 case RESTORE: 274 if (argc != 2) 275 usage(); 276 if (!(t = fopen(argv[1], "r"))) 277 err(4, "fopen %s", argv[1]); 278 readlabel(0); 279 if (!getasciilabel(t, &lab)) 280 exit(1); 281 error = writelabel(); 282 break; 283 284 case WRITE: 285 if (argc == 2) 286 name = argv[1]; 287 else if (argc == 1) 288 name = "auto"; 289 else 290 usage(); 291 readlabel(0); 292 makelabel(name, &lab); 293 fixlabel(&lab); 294 if (checklabel(NULL) == 0) 295 error = writelabel(); 296 break; 297 298 case WRITEBOOT: 299 300 readlabel(1); 301 fixlabel(&lab); 302 if (argc == 2) 303 makelabel(argv[1], &lab); 304 if (checklabel(NULL) == 0) 305 error = writelabel(); 306 break; 307 } 308 exit(error); 309 } 310 311 static void 312 fixlabel(struct disklabel *lp) 313 { 314 struct partition *dp; 315 int i; 316 317 for (i = 0; i < lp->d_npartitions; i++) { 318 if (i == RAW_PART) 319 continue; 320 if (lp->d_partitions[i].p_size) 321 return; 322 } 323 324 dp = &lp->d_partitions[0]; 325 dp->p_offset = BBSIZE / secsize; 326 dp->p_size = lp->d_secperunit - dp->p_offset; 327 } 328 329 /* 330 * Construct a prototype disklabel from /etc/disktab. 331 */ 332 static void 333 makelabel(const char *type, struct disklabel *lp) 334 { 335 struct disklabel *dp; 336 337 if (strcmp(type, "auto") == 0) 338 dp = getvirginlabel(); 339 else 340 dp = getdiskbyname(type); 341 if (dp == NULL) 342 errx(1, "%s: unknown disk type", type); 343 *lp = *dp; 344 bzero(lp->d_packname, sizeof(lp->d_packname)); 345 } 346 347 static void 348 readboot(void) 349 { 350 int fd; 351 struct stat st; 352 uint64_t *p; 353 354 if (xxboot == NULL) 355 xxboot = "/boot/boot"; 356 fd = open(xxboot, O_RDONLY); 357 if (fd < 0) 358 err(1, "cannot open %s", xxboot); 359 fstat(fd, &st); 360 if (alphacksum && st.st_size <= BBSIZE - 512) { 361 if (read(fd, bootarea + 512, st.st_size) != st.st_size) 362 err(1, "read error %s", xxboot); 363 364 /* 365 * Set the location and length so SRM can find the 366 * boot blocks. 367 */ 368 p = (uint64_t *)bootarea; 369 p[60] = (st.st_size + secsize - 1) / secsize; 370 p[61] = 1; 371 p[62] = 0; 372 return; 373 } else if ((!alphacksum) && st.st_size <= BBSIZE) { 374 if (read(fd, bootarea, st.st_size) != st.st_size) 375 err(1, "read error %s", xxboot); 376 return; 377 } 378 errx(1, "boot code %s is wrong size", xxboot); 379 } 380 381 static int 382 writelabel(void) 383 { 384 uint64_t *p, sum; 385 int i, fd; 386 struct gctl_req *grq; 387 char const *errstr; 388 struct disklabel *lp = &lab; 389 390 if (disable_write) { 391 warnx("write to disk label supressed - label was as follows:"); 392 display(stdout, NULL); 393 return (0); 394 } 395 396 lp->d_magic = DISKMAGIC; 397 lp->d_magic2 = DISKMAGIC; 398 lp->d_checksum = 0; 399 lp->d_checksum = dkcksum(lp); 400 if (installboot) 401 readboot(); 402 for (i = 0; i < lab.d_npartitions; i++) 403 if (lab.d_partitions[i].p_size) 404 lab.d_partitions[i].p_offset += lba_offset; 405 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 406 lp); 407 if (alphacksum) { 408 /* Generate the bootblock checksum for the SRM console. */ 409 for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++) 410 sum += p[i]; 411 p[63] = sum; 412 } 413 414 fd = open(specname, O_RDWR); 415 if (fd < 0) { 416 if (is_file) { 417 warn("cannot open file %s for writing label", specname); 418 return(1); 419 } 420 421 grq = gctl_get_handle(); 422 gctl_ro_param(grq, "verb", -1, "write label"); 423 gctl_ro_param(grq, "class", -1, "BSD"); 424 gctl_ro_param(grq, "geom", -1, pname); 425 gctl_ro_param(grq, "label", 148+16*8, 426 bootarea + labeloffset + labelsoffset * secsize); 427 errstr = gctl_issue(grq); 428 if (errstr != NULL) { 429 warnx("%s", errstr); 430 gctl_free(grq); 431 return(1); 432 } 433 gctl_free(grq); 434 if (installboot) { 435 grq = gctl_get_handle(); 436 gctl_ro_param(grq, "verb", -1, "write bootcode"); 437 gctl_ro_param(grq, "class", -1, "BSD"); 438 gctl_ro_param(grq, "geom", -1, pname); 439 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 440 errstr = gctl_issue(grq); 441 if (errstr != NULL) { 442 warnx("%s", errstr); 443 gctl_free(grq); 444 return (1); 445 } 446 gctl_free(grq); 447 } 448 } else { 449 if (write(fd, bootarea, bbsize) != bbsize) { 450 warn("write %s", specname); 451 close (fd); 452 return (1); 453 } 454 close (fd); 455 } 456 return (0); 457 } 458 459 static void 460 get_file_parms(int f) 461 { 462 int i; 463 struct stat sb; 464 465 if (fstat(f, &sb) != 0) 466 err(4, "fstat failed"); 467 i = sb.st_mode & S_IFMT; 468 if (i != S_IFREG && i != S_IFLNK) 469 errx(4, "%s is not a valid file or link", specname); 470 secsize = DEV_BSIZE; 471 mediasize = sb.st_size; 472 } 473 474 /* 475 * Fetch disklabel for disk. 476 */ 477 static int 478 readlabel(int flag) 479 { 480 ssize_t nbytes; 481 uint32_t lba; 482 int f, i; 483 int error; 484 485 f = open(specname, O_RDONLY); 486 if (f < 0) 487 err(1, specname); 488 if (is_file) 489 get_file_parms(f); 490 else { 491 mediasize = g_mediasize(f); 492 secsize = g_sectorsize(f); 493 if (secsize < 0 || mediasize < 0) 494 err(4, "cannot get disk geometry"); 495 } 496 if (mediasize > (off_t)0xffffffff * secsize) 497 errx(1, 498 "disks with more than 2^32-1 sectors are not supported"); 499 (void)lseek(f, (off_t)0, SEEK_SET); 500 nbytes = read(f, bootarea, BBSIZE); 501 if (nbytes == -1) 502 err(4, "%s read", specname); 503 if (nbytes != BBSIZE) 504 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 505 close (f); 506 error = bsd_disklabel_le_dec( 507 bootarea + (labeloffset + labelsoffset * secsize), 508 &lab, MAXPARTITIONS); 509 if (flag && error) 510 errx(1, "%s: no valid label found", specname); 511 512 if (is_file) 513 return(0); 514 515 /* 516 * Compensate for absolute block addressing by finding the 517 * smallest partition offset and if the offset of the 'c' 518 * partition is equal to that, subtract it from all offsets. 519 */ 520 lba = ~0; 521 for (i = 0; i < lab.d_npartitions; i++) { 522 if (lab.d_partitions[i].p_size) 523 lba = MIN(lba, lab.d_partitions[i].p_offset); 524 } 525 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 526 for (i = 0; i < lab.d_npartitions; i++) { 527 if (lab.d_partitions[i].p_size) 528 lab.d_partitions[i].p_offset -= lba; 529 } 530 /* 531 * Save the offset so that we can write the label 532 * back with absolute block addresses. 533 */ 534 lba_offset = lba; 535 } 536 return (error); 537 } 538 539 540 static void 541 display(FILE *f, const struct disklabel *lp) 542 { 543 int i, j; 544 const struct partition *pp; 545 546 if (lp == NULL) 547 lp = &lab; 548 549 fprintf(f, "# %s:\n", specname); 550 if (allfields) { 551 if (lp->d_type < DKMAXTYPES) 552 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 553 else 554 fprintf(f, "type: %u\n", lp->d_type); 555 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 556 lp->d_typename); 557 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 558 lp->d_packname); 559 fprintf(f, "flags:"); 560 if (lp->d_flags & D_REMOVABLE) 561 fprintf(f, " removeable"); 562 if (lp->d_flags & D_ECC) 563 fprintf(f, " ecc"); 564 if (lp->d_flags & D_BADSECT) 565 fprintf(f, " badsect"); 566 fprintf(f, "\n"); 567 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 568 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 569 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 570 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 571 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 572 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 573 fprintf(f, "rpm: %u\n", lp->d_rpm); 574 fprintf(f, "interleave: %u\n", lp->d_interleave); 575 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 576 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 577 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 578 (u_long)lp->d_headswitch); 579 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 580 (u_long)lp->d_trkseek); 581 fprintf(f, "drivedata: "); 582 for (i = NDDATA - 1; i >= 0; i--) 583 if (lp->d_drivedata[i]) 584 break; 585 if (i < 0) 586 i = 0; 587 for (j = 0; j <= i; j++) 588 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 589 fprintf(f, "\n\n"); 590 } 591 fprintf(f, "%u partitions:\n", lp->d_npartitions); 592 fprintf(f, 593 "# size offset fstype [fsize bsize bps/cpg]\n"); 594 pp = lp->d_partitions; 595 for (i = 0; i < lp->d_npartitions; i++, pp++) { 596 if (pp->p_size) { 597 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 598 (u_long)pp->p_size, (u_long)pp->p_offset); 599 if (pp->p_fstype < FSMAXTYPES) 600 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 601 else 602 fprintf(f, "%8d", pp->p_fstype); 603 switch (pp->p_fstype) { 604 605 case FS_UNUSED: /* XXX */ 606 fprintf(f, " %5lu %5lu %5.5s ", 607 (u_long)pp->p_fsize, 608 (u_long)(pp->p_fsize * pp->p_frag), ""); 609 break; 610 611 case FS_BSDFFS: 612 fprintf(f, " %5lu %5lu %5u ", 613 (u_long)pp->p_fsize, 614 (u_long)(pp->p_fsize * pp->p_frag), 615 pp->p_cpg); 616 break; 617 618 case FS_BSDLFS: 619 fprintf(f, " %5lu %5lu %5d", 620 (u_long)pp->p_fsize, 621 (u_long)(pp->p_fsize * pp->p_frag), 622 pp->p_cpg); 623 break; 624 625 default: 626 fprintf(f, "%20.20s", ""); 627 break; 628 } 629 if (i == RAW_PART) { 630 fprintf(f, " # \"raw\" part, don't edit"); 631 } 632 fprintf(f, "\n"); 633 } 634 } 635 fflush(f); 636 } 637 638 static int 639 edit(void) 640 { 641 int c, fd; 642 struct disklabel label; 643 FILE *fp; 644 645 if ((fd = mkstemp(tmpfil)) == -1 || 646 (fp = fdopen(fd, "w")) == NULL) { 647 warnx("can't create %s", tmpfil); 648 return (1); 649 } 650 display(fp, NULL); 651 fclose(fp); 652 for (;;) { 653 if (!editit()) 654 break; 655 fp = fopen(tmpfil, "r"); 656 if (fp == NULL) { 657 warnx("can't reopen %s for reading", tmpfil); 658 break; 659 } 660 bzero((char *)&label, sizeof(label)); 661 c = getasciilabel(fp, &label); 662 fclose(fp); 663 if (c) { 664 lab = label; 665 if (writelabel() == 0) { 666 (void) unlink(tmpfil); 667 return (0); 668 } 669 } 670 printf("re-edit the label? [y]: "); 671 fflush(stdout); 672 c = getchar(); 673 if (c != EOF && c != (int)'\n') 674 while (getchar() != (int)'\n') 675 ; 676 if (c == (int)'n') 677 break; 678 } 679 (void) unlink(tmpfil); 680 return (1); 681 } 682 683 static int 684 editit(void) 685 { 686 int pid, xpid; 687 int locstat, omask; 688 const char *ed; 689 uid_t uid; 690 gid_t gid; 691 692 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 693 while ((pid = fork()) < 0) { 694 if (errno == EPROCLIM) { 695 warnx("you have too many processes"); 696 return(0); 697 } 698 if (errno != EAGAIN) { 699 warn("fork"); 700 return(0); 701 } 702 sleep(1); 703 } 704 if (pid == 0) { 705 sigsetmask(omask); 706 gid = getgid(); 707 if (setresgid(gid, gid, gid) == -1) 708 err(1, "setresgid"); 709 uid = getuid(); 710 if (setresuid(uid, uid, uid) == -1) 711 err(1, "setresuid"); 712 if ((ed = getenv("EDITOR")) == (char *)0) 713 ed = DEFEDITOR; 714 execlp(ed, ed, tmpfil, (char *)0); 715 err(1, "%s", ed); 716 } 717 while ((xpid = wait(&locstat)) >= 0) 718 if (xpid == pid) 719 break; 720 sigsetmask(omask); 721 return(!locstat); 722 } 723 724 static char * 725 skip(char *cp) 726 { 727 728 while (*cp != '\0' && isspace(*cp)) 729 cp++; 730 if (*cp == '\0' || *cp == '#') 731 return (NULL); 732 return (cp); 733 } 734 735 static char * 736 word(char *cp) 737 { 738 char c; 739 740 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 741 cp++; 742 if ((c = *cp) != '\0') { 743 *cp++ = '\0'; 744 if (c != '#') 745 return (skip(cp)); 746 } 747 return (NULL); 748 } 749 750 /* 751 * Read an ascii label in from fd f, 752 * in the same format as that put out by display(), 753 * and fill in lp. 754 */ 755 static int 756 getasciilabel(FILE *f, struct disklabel *lp) 757 { 758 char *cp, *endp; 759 const char **cpp; 760 u_int part; 761 char *tp, line[BUFSIZ]; 762 u_long v; 763 int lineno = 0, errors = 0; 764 int i; 765 766 makelabel("auto", lp); 767 bzero(&part_set, sizeof(part_set)); 768 bzero(&part_size_type, sizeof(part_size_type)); 769 bzero(&part_offset_type, sizeof(part_offset_type)); 770 lp->d_bbsize = BBSIZE; /* XXX */ 771 lp->d_sbsize = 0; /* XXX */ 772 while (fgets(line, sizeof(line) - 1, f)) { 773 lineno++; 774 if ((cp = index(line,'\n')) != 0) 775 *cp = '\0'; 776 cp = skip(line); 777 if (cp == NULL) 778 continue; 779 tp = index(cp, ':'); 780 if (tp == NULL) { 781 fprintf(stderr, "line %d: syntax error\n", lineno); 782 errors++; 783 continue; 784 } 785 *tp++ = '\0', tp = skip(tp); 786 if (!strcmp(cp, "type")) { 787 if (tp == NULL) 788 tp = unknown; 789 cpp = dktypenames; 790 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 791 if (*cpp && !strcmp(*cpp, tp)) { 792 lp->d_type = cpp - dktypenames; 793 break; 794 } 795 if (cpp < &dktypenames[DKMAXTYPES]) 796 continue; 797 errno = 0; 798 v = strtoul(tp, &endp, 10); 799 if (errno != 0 || *endp != '\0') 800 v = DKMAXTYPES; 801 if (v >= DKMAXTYPES) 802 fprintf(stderr, "line %d:%s %lu\n", lineno, 803 "Warning, unknown disk type", v); 804 else 805 lp->d_type = v; 806 continue; 807 } 808 if (!strcmp(cp, "flags")) { 809 for (v = 0; (cp = tp) && *cp != '\0';) { 810 tp = word(cp); 811 if (!strcmp(cp, "removeable")) 812 v |= D_REMOVABLE; 813 else if (!strcmp(cp, "ecc")) 814 v |= D_ECC; 815 else if (!strcmp(cp, "badsect")) 816 v |= D_BADSECT; 817 else { 818 fprintf(stderr, 819 "line %d: %s: bad flag\n", 820 lineno, cp); 821 errors++; 822 } 823 } 824 lp->d_flags = v; 825 continue; 826 } 827 if (!strcmp(cp, "drivedata")) { 828 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 829 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 830 tp = word(cp); 831 } 832 continue; 833 } 834 if (sscanf(cp, "%lu partitions", &v) == 1) { 835 if (v == 0 || v > MAXPARTITIONS) { 836 fprintf(stderr, 837 "line %d: bad # of partitions\n", lineno); 838 lp->d_npartitions = MAXPARTITIONS; 839 errors++; 840 } else 841 lp->d_npartitions = v; 842 continue; 843 } 844 if (tp == NULL) 845 tp = blank; 846 if (!strcmp(cp, "disk")) { 847 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 848 continue; 849 } 850 if (!strcmp(cp, "label")) { 851 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 852 continue; 853 } 854 if (!strcmp(cp, "bytes/sector")) { 855 v = strtoul(tp, NULL, 10); 856 if (v == 0 || (v % DEV_BSIZE) != 0) { 857 fprintf(stderr, 858 "line %d: %s: bad sector size\n", 859 lineno, tp); 860 errors++; 861 } else 862 lp->d_secsize = v; 863 continue; 864 } 865 if (!strcmp(cp, "sectors/track")) { 866 v = strtoul(tp, NULL, 10); 867 #if (ULONG_MAX != 0xffffffffUL) 868 if (v == 0 || v > 0xffffffff) 869 #else 870 if (v == 0) 871 #endif 872 { 873 fprintf(stderr, "line %d: %s: bad %s\n", 874 lineno, tp, cp); 875 errors++; 876 } else 877 lp->d_nsectors = v; 878 continue; 879 } 880 if (!strcmp(cp, "sectors/cylinder")) { 881 v = strtoul(tp, NULL, 10); 882 if (v == 0) { 883 fprintf(stderr, "line %d: %s: bad %s\n", 884 lineno, tp, cp); 885 errors++; 886 } else 887 lp->d_secpercyl = v; 888 continue; 889 } 890 if (!strcmp(cp, "tracks/cylinder")) { 891 v = strtoul(tp, NULL, 10); 892 if (v == 0) { 893 fprintf(stderr, "line %d: %s: bad %s\n", 894 lineno, tp, cp); 895 errors++; 896 } else 897 lp->d_ntracks = v; 898 continue; 899 } 900 if (!strcmp(cp, "cylinders")) { 901 v = strtoul(tp, NULL, 10); 902 if (v == 0) { 903 fprintf(stderr, "line %d: %s: bad %s\n", 904 lineno, tp, cp); 905 errors++; 906 } else 907 lp->d_ncylinders = v; 908 continue; 909 } 910 if (!strcmp(cp, "sectors/unit")) { 911 v = strtoul(tp, NULL, 10); 912 if (v == 0) { 913 fprintf(stderr, "line %d: %s: bad %s\n", 914 lineno, tp, cp); 915 errors++; 916 } else 917 lp->d_secperunit = v; 918 continue; 919 } 920 if (!strcmp(cp, "rpm")) { 921 v = strtoul(tp, NULL, 10); 922 if (v == 0 || v > USHRT_MAX) { 923 fprintf(stderr, "line %d: %s: bad %s\n", 924 lineno, tp, cp); 925 errors++; 926 } else 927 lp->d_rpm = v; 928 continue; 929 } 930 if (!strcmp(cp, "interleave")) { 931 v = strtoul(tp, NULL, 10); 932 if (v == 0 || v > USHRT_MAX) { 933 fprintf(stderr, "line %d: %s: bad %s\n", 934 lineno, tp, cp); 935 errors++; 936 } else 937 lp->d_interleave = v; 938 continue; 939 } 940 if (!strcmp(cp, "trackskew")) { 941 v = strtoul(tp, NULL, 10); 942 if (v > USHRT_MAX) { 943 fprintf(stderr, "line %d: %s: bad %s\n", 944 lineno, tp, cp); 945 errors++; 946 } else 947 lp->d_trackskew = v; 948 continue; 949 } 950 if (!strcmp(cp, "cylinderskew")) { 951 v = strtoul(tp, NULL, 10); 952 if (v > USHRT_MAX) { 953 fprintf(stderr, "line %d: %s: bad %s\n", 954 lineno, tp, cp); 955 errors++; 956 } else 957 lp->d_cylskew = v; 958 continue; 959 } 960 if (!strcmp(cp, "headswitch")) { 961 v = strtoul(tp, NULL, 10); 962 lp->d_headswitch = v; 963 continue; 964 } 965 if (!strcmp(cp, "track-to-track seek")) { 966 v = strtoul(tp, NULL, 10); 967 lp->d_trkseek = v; 968 continue; 969 } 970 /* the ':' was removed above */ 971 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 972 fprintf(stderr, 973 "line %d: %s: Unknown disklabel field\n", lineno, 974 cp); 975 errors++; 976 continue; 977 } 978 979 /* Process a partition specification line. */ 980 part = *cp - 'a'; 981 if (part >= lp->d_npartitions) { 982 fprintf(stderr, 983 "line %d: partition name out of range a-%c: %s\n", 984 lineno, 'a' + lp->d_npartitions - 1, cp); 985 errors++; 986 continue; 987 } 988 part_set[part] = 1; 989 990 if (getasciipartspec(tp, lp, part, lineno) != 0) { 991 errors++; 992 break; 993 } 994 } 995 errors += checklabel(lp); 996 return (errors == 0); 997 } 998 999 #define NXTNUM(n) do { \ 1000 if (tp == NULL) { \ 1001 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1002 return (1); \ 1003 } else { \ 1004 cp = tp, tp = word(cp); \ 1005 (n) = strtoul(cp, NULL, 10); \ 1006 } \ 1007 } while (0) 1008 1009 /* retain 1 character following number */ 1010 #define NXTWORD(w,n) do { \ 1011 if (tp == NULL) { \ 1012 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1013 return (1); \ 1014 } else { \ 1015 char *tmp; \ 1016 cp = tp, tp = word(cp); \ 1017 (n) = strtoul(cp, &tmp, 10); \ 1018 if (tmp) (w) = *tmp; \ 1019 } \ 1020 } while (0) 1021 1022 /* 1023 * Read a partition line into partition `part' in the specified disklabel. 1024 * Return 0 on success, 1 on failure. 1025 */ 1026 static int 1027 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1028 { 1029 struct partition *pp; 1030 char *cp, *endp; 1031 const char **cpp; 1032 u_long v; 1033 1034 pp = &lp->d_partitions[part]; 1035 cp = NULL; 1036 1037 v = 0; 1038 NXTWORD(part_size_type[part],v); 1039 if (v == 0 && part_size_type[part] != '*') { 1040 fprintf(stderr, 1041 "line %d: %s: bad partition size\n", lineno, cp); 1042 return (1); 1043 } 1044 pp->p_size = v; 1045 1046 v = 0; 1047 NXTWORD(part_offset_type[part],v); 1048 if (v == 0 && part_offset_type[part] != '*' && 1049 part_offset_type[part] != '\0') { 1050 fprintf(stderr, 1051 "line %d: %s: bad partition offset\n", lineno, cp); 1052 return (1); 1053 } 1054 pp->p_offset = v; 1055 if (tp == NULL) { 1056 fprintf(stderr, "line %d: missing file system type\n", lineno); 1057 return (1); 1058 } 1059 cp = tp, tp = word(cp); 1060 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1061 if (*cpp && !strcmp(*cpp, cp)) 1062 break; 1063 if (*cpp != NULL) { 1064 pp->p_fstype = cpp - fstypenames; 1065 } else { 1066 if (isdigit(*cp)) { 1067 errno = 0; 1068 v = strtoul(cp, &endp, 10); 1069 if (errno != 0 || *endp != '\0') 1070 v = FSMAXTYPES; 1071 } else 1072 v = FSMAXTYPES; 1073 if (v >= FSMAXTYPES) { 1074 fprintf(stderr, 1075 "line %d: Warning, unknown file system type %s\n", 1076 lineno, cp); 1077 v = FS_UNUSED; 1078 } 1079 pp->p_fstype = v; 1080 } 1081 1082 switch (pp->p_fstype) { 1083 case FS_UNUSED: 1084 case FS_BSDFFS: 1085 case FS_BSDLFS: 1086 /* accept defaults for fsize/frag/cpg */ 1087 if (tp) { 1088 NXTNUM(pp->p_fsize); 1089 if (pp->p_fsize == 0) 1090 break; 1091 NXTNUM(v); 1092 pp->p_frag = v / pp->p_fsize; 1093 if (tp != NULL) 1094 NXTNUM(pp->p_cpg); 1095 } 1096 /* else default to 0's */ 1097 break; 1098 default: 1099 break; 1100 } 1101 return (0); 1102 } 1103 1104 /* 1105 * Check disklabel for errors and fill in 1106 * derived fields according to supplied values. 1107 */ 1108 static int 1109 checklabel(struct disklabel *lp) 1110 { 1111 struct partition *pp; 1112 int i, errors = 0; 1113 char part; 1114 u_long base_offset, needed, total_size, total_percent, current_offset; 1115 long free_space; 1116 int seen_default_offset; 1117 int hog_part; 1118 int j; 1119 struct partition *pp2; 1120 1121 if (lp == NULL) 1122 lp = &lab; 1123 1124 if (allfields) { 1125 1126 if (lp->d_secsize == 0) { 1127 fprintf(stderr, "sector size 0\n"); 1128 return (1); 1129 } 1130 if (lp->d_nsectors == 0) { 1131 fprintf(stderr, "sectors/track 0\n"); 1132 return (1); 1133 } 1134 if (lp->d_ntracks == 0) { 1135 fprintf(stderr, "tracks/cylinder 0\n"); 1136 return (1); 1137 } 1138 if (lp->d_ncylinders == 0) { 1139 fprintf(stderr, "cylinders/unit 0\n"); 1140 errors++; 1141 } 1142 if (lp->d_rpm == 0) 1143 warnx("revolutions/minute 0"); 1144 if (lp->d_secpercyl == 0) 1145 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1146 if (lp->d_secperunit == 0) 1147 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1148 if (lp->d_bbsize == 0) { 1149 fprintf(stderr, "boot block size 0\n"); 1150 errors++; 1151 } else if (lp->d_bbsize % lp->d_secsize) 1152 warnx("boot block size %% sector-size != 0"); 1153 if (lp->d_npartitions > MAXPARTITIONS) 1154 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1155 (u_long)lp->d_npartitions, MAXPARTITIONS); 1156 } else { 1157 struct disklabel *vl; 1158 1159 vl = getvirginlabel(); 1160 lp->d_secsize = vl->d_secsize; 1161 lp->d_nsectors = vl->d_nsectors; 1162 lp->d_ntracks = vl->d_ntracks; 1163 lp->d_ncylinders = vl->d_ncylinders; 1164 lp->d_rpm = vl->d_rpm; 1165 lp->d_interleave = vl->d_interleave; 1166 lp->d_secpercyl = vl->d_secpercyl; 1167 lp->d_secperunit = vl->d_secperunit; 1168 lp->d_bbsize = vl->d_bbsize; 1169 lp->d_npartitions = vl->d_npartitions; 1170 } 1171 1172 1173 /* first allocate space to the partitions, then offsets */ 1174 total_size = 0; /* in sectors */ 1175 total_percent = 0; /* in percent */ 1176 hog_part = -1; 1177 /* find all fixed partitions */ 1178 for (i = 0; i < lp->d_npartitions; i++) { 1179 pp = &lp->d_partitions[i]; 1180 if (part_set[i]) { 1181 if (part_size_type[i] == '*') { 1182 if (i == RAW_PART) { 1183 pp->p_size = lp->d_secperunit; 1184 } else { 1185 if (hog_part != -1) 1186 warnx("Too many '*' partitions (%c and %c)", 1187 hog_part + 'a',i + 'a'); 1188 else 1189 hog_part = i; 1190 } 1191 } else { 1192 off_t size; 1193 1194 size = pp->p_size; 1195 switch (part_size_type[i]) { 1196 case '%': 1197 total_percent += size; 1198 break; 1199 case 't': 1200 case 'T': 1201 size *= 1024ULL; 1202 /* FALLTHROUGH */ 1203 case 'g': 1204 case 'G': 1205 size *= 1024ULL; 1206 /* FALLTHROUGH */ 1207 case 'm': 1208 case 'M': 1209 size *= 1024ULL; 1210 /* FALLTHROUGH */ 1211 case 'k': 1212 case 'K': 1213 size *= 1024ULL; 1214 break; 1215 case '\0': 1216 break; 1217 default: 1218 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1219 part_size_type[i], i + 'a'); 1220 break; 1221 } 1222 /* don't count %'s yet */ 1223 if (part_size_type[i] != '%') { 1224 /* 1225 * for all not in sectors, convert to 1226 * sectors 1227 */ 1228 if (part_size_type[i] != '\0') { 1229 if (size % lp->d_secsize != 0) 1230 warnx("partition %c not an integer number of sectors", 1231 i + 'a'); 1232 size /= lp->d_secsize; 1233 pp->p_size = size; 1234 } 1235 /* else already in sectors */ 1236 if (i != RAW_PART) 1237 total_size += size; 1238 } 1239 } 1240 } 1241 } 1242 1243 /* Find out the total free space, excluding the boot block area. */ 1244 base_offset = BBSIZE / secsize; 1245 free_space = 0; 1246 for (i = 0; i < lp->d_npartitions; i++) { 1247 pp = &lp->d_partitions[i]; 1248 if (!part_set[i] || i == RAW_PART || 1249 part_size_type[i] == '%' || part_size_type[i] == '*') 1250 continue; 1251 if (pp->p_offset > base_offset) 1252 free_space += pp->p_offset - base_offset; 1253 if (pp->p_offset + pp->p_size > base_offset) 1254 base_offset = pp->p_offset + pp->p_size; 1255 } 1256 if (base_offset < lp->d_secperunit) 1257 free_space += lp->d_secperunit - base_offset; 1258 1259 /* handle % partitions - note %'s don't need to add up to 100! */ 1260 if (total_percent != 0) { 1261 if (total_percent > 100) { 1262 fprintf(stderr,"total percentage %lu is greater than 100\n", 1263 total_percent); 1264 errors++; 1265 } 1266 1267 if (free_space > 0) { 1268 for (i = 0; i < lp->d_npartitions; i++) { 1269 pp = &lp->d_partitions[i]; 1270 if (part_set[i] && part_size_type[i] == '%') { 1271 /* careful of overflows! and integer roundoff */ 1272 pp->p_size = ((double)pp->p_size/100) * free_space; 1273 total_size += pp->p_size; 1274 1275 /* FIX we can lose a sector or so due to roundoff per 1276 partition. A more complex algorithm could avoid that */ 1277 } 1278 } 1279 } else { 1280 fprintf(stderr, 1281 "%ld sectors available to give to '*' and '%%' partitions\n", 1282 free_space); 1283 errors++; 1284 /* fix? set all % partitions to size 0? */ 1285 } 1286 } 1287 /* give anything remaining to the hog partition */ 1288 if (hog_part != -1) { 1289 /* 1290 * Find the range of offsets usable by '*' partitions around 1291 * the hog partition and how much space they need. 1292 */ 1293 needed = 0; 1294 base_offset = BBSIZE / secsize; 1295 for (i = hog_part - 1; i >= 0; i--) { 1296 pp = &lp->d_partitions[i]; 1297 if (!part_set[i] || i == RAW_PART) 1298 continue; 1299 if (part_offset_type[i] == '*') { 1300 needed += pp->p_size; 1301 continue; 1302 } 1303 base_offset = pp->p_offset + pp->p_size; 1304 break; 1305 } 1306 current_offset = lp->d_secperunit; 1307 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1308 pp = &lp->d_partitions[i]; 1309 if (!part_set[i] || i == RAW_PART) 1310 continue; 1311 if (part_offset_type[i] == '*') { 1312 needed += pp->p_size; 1313 continue; 1314 } 1315 current_offset = pp->p_offset; 1316 } 1317 1318 if (current_offset - base_offset <= needed) { 1319 fprintf(stderr, "Cannot find space for partition %c\n", 1320 hog_part + 'a'); 1321 fprintf(stderr, 1322 "Need more than %lu sectors between %lu and %lu\n", 1323 needed, base_offset, current_offset); 1324 errors++; 1325 lp->d_partitions[hog_part].p_size = 0; 1326 } else { 1327 lp->d_partitions[hog_part].p_size = current_offset - 1328 base_offset - needed; 1329 total_size += lp->d_partitions[hog_part].p_size; 1330 } 1331 } 1332 1333 /* Now set the offsets for each partition */ 1334 current_offset = BBSIZE / secsize; /* in sectors */ 1335 seen_default_offset = 0; 1336 for (i = 0; i < lp->d_npartitions; i++) { 1337 part = 'a' + i; 1338 pp = &lp->d_partitions[i]; 1339 if (part_set[i]) { 1340 if (part_offset_type[i] == '*') { 1341 if (i == RAW_PART) { 1342 pp->p_offset = 0; 1343 } else { 1344 pp->p_offset = current_offset; 1345 seen_default_offset = 1; 1346 } 1347 } else { 1348 /* allow them to be out of order for old-style tables */ 1349 if (pp->p_offset < current_offset && 1350 seen_default_offset && i != RAW_PART && 1351 pp->p_fstype != FS_VINUM) { 1352 fprintf(stderr, 1353 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1354 (long)pp->p_offset,i+'a',current_offset); 1355 fprintf(stderr, 1356 "Labels with any *'s for offset must be in ascending order by sector\n"); 1357 errors++; 1358 } else if (pp->p_offset != current_offset && 1359 i != RAW_PART && seen_default_offset) { 1360 /* 1361 * this may give unneeded warnings if 1362 * partitions are out-of-order 1363 */ 1364 warnx( 1365 "Offset %ld for partition %c doesn't match expected value %ld", 1366 (long)pp->p_offset, i + 'a', current_offset); 1367 } 1368 } 1369 if (i != RAW_PART) 1370 current_offset = pp->p_offset + pp->p_size; 1371 } 1372 } 1373 1374 for (i = 0; i < lp->d_npartitions; i++) { 1375 part = 'a' + i; 1376 pp = &lp->d_partitions[i]; 1377 if (pp->p_size == 0 && pp->p_offset != 0) 1378 warnx("partition %c: size 0, but offset %lu", 1379 part, (u_long)pp->p_offset); 1380 #ifdef notdef 1381 if (pp->p_size % lp->d_secpercyl) 1382 warnx("partition %c: size %% cylinder-size != 0", 1383 part); 1384 if (pp->p_offset % lp->d_secpercyl) 1385 warnx("partition %c: offset %% cylinder-size != 0", 1386 part); 1387 #endif 1388 if (pp->p_offset > lp->d_secperunit) { 1389 fprintf(stderr, 1390 "partition %c: offset past end of unit\n", part); 1391 errors++; 1392 } 1393 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1394 fprintf(stderr, 1395 "partition %c: partition extends past end of unit\n", 1396 part); 1397 errors++; 1398 } 1399 if (i == RAW_PART) { 1400 if (pp->p_fstype != FS_UNUSED) 1401 warnx("partition %c is not marked as unused!",part); 1402 if (pp->p_offset != 0) 1403 warnx("partition %c doesn't start at 0!",part); 1404 if (pp->p_size != lp->d_secperunit) 1405 warnx("partition %c doesn't cover the whole unit!",part); 1406 1407 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1408 (pp->p_size != lp->d_secperunit)) { 1409 warnx("An incorrect partition %c may cause problems for " 1410 "standard system utilities",part); 1411 } 1412 } 1413 1414 /* check for overlaps */ 1415 /* this will check for all possible overlaps once and only once */ 1416 for (j = 0; j < i; j++) { 1417 pp2 = &lp->d_partitions[j]; 1418 if (j != RAW_PART && i != RAW_PART && 1419 pp->p_fstype != FS_VINUM && 1420 pp2->p_fstype != FS_VINUM && 1421 part_set[i] && part_set[j]) { 1422 if (pp2->p_offset < pp->p_offset + pp->p_size && 1423 (pp2->p_offset + pp2->p_size > pp->p_offset || 1424 pp2->p_offset >= pp->p_offset)) { 1425 fprintf(stderr,"partitions %c and %c overlap!\n", 1426 j + 'a', i + 'a'); 1427 errors++; 1428 } 1429 } 1430 } 1431 } 1432 for (; i < lp->d_npartitions; i++) { 1433 part = 'a' + i; 1434 pp = &lp->d_partitions[i]; 1435 if (pp->p_size || pp->p_offset) 1436 warnx("unused partition %c: size %d offset %lu", 1437 'a' + i, pp->p_size, (u_long)pp->p_offset); 1438 } 1439 return (errors); 1440 } 1441 1442 /* 1443 * When operating on a "virgin" disk, try getting an initial label 1444 * from the associated device driver. This might work for all device 1445 * drivers that are able to fetch some initial device parameters 1446 * without even having access to a (BSD) disklabel, like SCSI disks, 1447 * most IDE drives, or vn devices. 1448 * 1449 * The device name must be given in its "canonical" form. 1450 */ 1451 static struct disklabel * 1452 getvirginlabel(void) 1453 { 1454 static struct disklabel loclab; 1455 struct partition *dp; 1456 int f; 1457 u_int u; 1458 1459 if ((f = open(specname, O_RDONLY)) == -1) { 1460 warn("cannot open %s", specname); 1461 return (NULL); 1462 } 1463 1464 if (is_file) 1465 get_file_parms(f); 1466 else { 1467 mediasize = g_mediasize(f); 1468 secsize = g_sectorsize(f); 1469 if (secsize < 0 || mediasize < 0) { 1470 close (f); 1471 return (NULL); 1472 } 1473 } 1474 memset(&loclab, 0, sizeof loclab); 1475 loclab.d_magic = DISKMAGIC; 1476 loclab.d_magic2 = DISKMAGIC; 1477 loclab.d_secsize = secsize; 1478 loclab.d_secperunit = mediasize / secsize; 1479 1480 /* 1481 * Nobody in these enligthened days uses the CHS geometry for 1482 * anything, but nontheless try to get it right. If we fail 1483 * to get any good ideas from the device, construct something 1484 * which is IBM-PC friendly. 1485 */ 1486 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1487 loclab.d_nsectors = u; 1488 else 1489 loclab.d_nsectors = 63; 1490 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1491 loclab.d_ntracks = u; 1492 else if (loclab.d_secperunit <= 63*1*1024) 1493 loclab.d_ntracks = 1; 1494 else if (loclab.d_secperunit <= 63*16*1024) 1495 loclab.d_ntracks = 16; 1496 else 1497 loclab.d_ntracks = 255; 1498 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1499 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1500 loclab.d_npartitions = DEFPARTITIONS; 1501 1502 /* Various (unneeded) compat stuff */ 1503 loclab.d_rpm = 3600; 1504 loclab.d_bbsize = BBSIZE; 1505 loclab.d_interleave = 1; 1506 strncpy(loclab.d_typename, "amnesiac", 1507 sizeof(loclab.d_typename)); 1508 1509 dp = &loclab.d_partitions[RAW_PART]; 1510 dp->p_size = loclab.d_secperunit; 1511 loclab.d_checksum = dkcksum(&loclab); 1512 close (f); 1513 return (&loclab); 1514 } 1515 1516 static void 1517 usage(void) 1518 { 1519 1520 fprintf(stderr, 1521 "%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", 1522 "usage: bsdlabel disk", 1523 "\t\t(to read label)", 1524 " bsdlabel -w [-n] [-m machine] disk [type]", 1525 "\t\t(to write label with existing boot program)", 1526 " bsdlabel -e [-n] [-m machine] disk", 1527 "\t\t(to edit label)", 1528 " bsdlabel -R [-n] [-m machine] disk protofile", 1529 "\t\t(to restore label with existing boot program)", 1530 " bsdlabel -B [-b boot] [-m machine] disk", 1531 "\t\t(to install boot program with existing on-disk label)", 1532 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1533 "\t\t(to write label and install boot program)", 1534 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1535 "\t\t(to restore label and install boot program)" 1536 ); 1537 exit(1); 1538 } 1539