1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1994, 1995 Gordon W. Ross 5 * Copyright (c) 1994 Theo de Raadt 6 * All rights reserved. 7 * Copyright (c) 1987, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Symmetric Computer Systems. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * This product includes software developed by Theo de Raadt. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $ 43 */ 44 45 #if 0 46 #ifndef lint 47 static const char copyright[] = 48 "@(#) Copyright (c) 1987, 1993\n\ 49 The Regents of the University of California. All rights reserved.\n"; 50 #endif /* not lint */ 51 52 #ifndef lint 53 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94"; 54 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ 55 #endif /* not lint */ 56 #endif 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD$"); 59 60 #include <sys/param.h> 61 #include <stdint.h> 62 #include <sys/file.h> 63 #include <sys/stat.h> 64 #include <sys/wait.h> 65 #include <sys/disk.h> 66 #define DKTYPENAMES 67 #define FSTYPENAMES 68 #define MAXPARTITIONS 20 69 #include <sys/disklabel.h> 70 71 #include <unistd.h> 72 #include <string.h> 73 #include <stdio.h> 74 #include <libgeom.h> 75 #include <stdlib.h> 76 #include <signal.h> 77 #include <stdarg.h> 78 #include <ctype.h> 79 #include <err.h> 80 #include <errno.h> 81 82 #include "pathnames.h" 83 84 static void makelabel(const char *, struct disklabel *); 85 static int geom_class_available(const char *); 86 static int writelabel(void); 87 static int readlabel(int flag); 88 static void display(FILE *, const struct disklabel *); 89 static int edit(void); 90 static int editit(void); 91 static void fixlabel(struct disklabel *); 92 static char *skip(char *); 93 static char *word(char *); 94 static int getasciilabel(FILE *, struct disklabel *); 95 static int getasciipartspec(char *, struct disklabel *, int, int); 96 static int checklabel(struct disklabel *); 97 static void usage(void); 98 static struct disklabel *getvirginlabel(void); 99 100 #define DEFEDITOR _PATH_VI 101 #define DEFPARTITIONS 8 102 103 static char *specname; 104 static char *pname; 105 static char tmpfil[] = PATH_TMPFILE; 106 107 static struct disklabel lab; 108 static u_char bootarea[BBSIZE]; 109 static off_t mediasize; 110 static ssize_t secsize; 111 static char blank[] = ""; 112 static char unknown[] = "unknown"; 113 114 #define MAX_PART ('z') 115 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 116 static char part_size_type[MAX_NUM_PARTS]; 117 static char part_offset_type[MAX_NUM_PARTS]; 118 static int part_set[MAX_NUM_PARTS]; 119 120 static int installboot; /* non-zero if we should install a boot program */ 121 static int allfields; /* present all fields in edit */ 122 static char const *xxboot; /* primary boot */ 123 124 static uint32_t lba_offset; 125 #ifndef LABELSECTOR 126 #define LABELSECTOR -1 127 #endif 128 #ifndef LABELOFFSET 129 #define LABELOFFSET -1 130 #endif 131 static int labelsoffset = LABELSECTOR; 132 static int labeloffset = LABELOFFSET; 133 static int bbsize = BBSIZE; 134 135 static enum { 136 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 137 } op = UNSPEC; 138 139 140 static int disable_write; /* set to disable writing to disk label */ 141 static int is_file; /* work on a file (abs. pathname), "-f" opt. */ 142 143 int 144 main(int argc, char *argv[]) 145 { 146 FILE *t; 147 int ch, error, fd; 148 const char *name; 149 150 error = 0; 151 name = NULL; 152 153 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1) 154 switch (ch) { 155 case 'A': 156 allfields = 1; 157 break; 158 case 'B': 159 ++installboot; 160 break; 161 case 'b': 162 xxboot = optarg; 163 break; 164 case 'f': 165 is_file=1; 166 break; 167 case 'm': 168 if (!strcmp(optarg, "i386") || 169 !strcmp(optarg, "amd64")) { 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 ignore -r for compatibility with 193 * historical 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 disklabel *lp = &lab; 385 386 if (disable_write) { 387 warnx("write to disk label suppressed - label was as follows:"); 388 display(stdout, NULL); 389 return (0); 390 } 391 392 lp->d_magic = DISKMAGIC; 393 lp->d_magic2 = DISKMAGIC; 394 lp->d_checksum = 0; 395 lp->d_checksum = dkcksum(lp); 396 if (installboot) 397 readboot(); 398 for (i = 0; i < lab.d_npartitions; i++) 399 if (lab.d_partitions[i].p_size) 400 lab.d_partitions[i].p_offset += lba_offset; 401 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize, 402 lp); 403 404 fd = open(specname, O_RDWR); 405 if (fd < 0) { 406 if (is_file) { 407 warn("cannot open file %s for writing label", specname); 408 return(1); 409 } else 410 serrno = errno; 411 412 if (geom_class_available("PART") != 0) { 413 /* 414 * Since we weren't able open provider for 415 * writing, then recommend user to use gpart(8). 416 */ 417 warnc(serrno, 418 "cannot open provider %s for writing label", 419 specname); 420 warnx("Try to use gpart(8)."); 421 return (1); 422 } 423 424 warnc(serrno, "%s", specname); 425 return (1); 426 } else { 427 if (write(fd, bootarea, bbsize) != bbsize) { 428 warn("write %s", specname); 429 close (fd); 430 return (1); 431 } 432 close (fd); 433 } 434 return (0); 435 } 436 437 static void 438 get_file_parms(int f) 439 { 440 int i; 441 struct stat sb; 442 443 if (fstat(f, &sb) != 0) 444 err(4, "fstat failed"); 445 i = sb.st_mode & S_IFMT; 446 if (i != S_IFREG && i != S_IFLNK) 447 errx(4, "%s is not a valid file or link", specname); 448 secsize = DEV_BSIZE; 449 mediasize = sb.st_size; 450 } 451 452 /* 453 * Fetch disklabel for disk. 454 */ 455 static int 456 readlabel(int flag) 457 { 458 ssize_t nbytes; 459 uint32_t lba; 460 int f, i; 461 int error; 462 463 f = open(specname, O_RDONLY); 464 if (f < 0) 465 err(1, "%s", specname); 466 if (is_file) 467 get_file_parms(f); 468 else { 469 mediasize = g_mediasize(f); 470 secsize = g_sectorsize(f); 471 if (secsize < 0 || mediasize < 0) 472 err(4, "cannot get disk geometry"); 473 } 474 if (mediasize > (off_t)0xffffffff * secsize) 475 errx(1, 476 "disks with more than 2^32-1 sectors are not supported"); 477 (void)lseek(f, (off_t)0, SEEK_SET); 478 nbytes = read(f, bootarea, BBSIZE); 479 if (nbytes == -1) 480 err(4, "%s read", specname); 481 if (nbytes != BBSIZE) 482 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname); 483 close (f); 484 error = bsd_disklabel_le_dec( 485 bootarea + (labeloffset + labelsoffset * secsize), 486 &lab, MAXPARTITIONS); 487 if (flag && error) 488 errx(1, "%s: no valid label found", specname); 489 490 if (is_file) 491 return(0); 492 493 /* 494 * Compensate for absolute block addressing by finding the 495 * smallest partition offset and if the offset of the 'c' 496 * partition is equal to that, subtract it from all offsets. 497 */ 498 lba = ~0; 499 for (i = 0; i < lab.d_npartitions; i++) { 500 if (lab.d_partitions[i].p_size) 501 lba = MIN(lba, lab.d_partitions[i].p_offset); 502 } 503 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) { 504 for (i = 0; i < lab.d_npartitions; i++) { 505 if (lab.d_partitions[i].p_size) 506 lab.d_partitions[i].p_offset -= lba; 507 } 508 /* 509 * Save the offset so that we can write the label 510 * back with absolute block addresses. 511 */ 512 lba_offset = lba; 513 } 514 return (error); 515 } 516 517 518 static void 519 display(FILE *f, const struct disklabel *lp) 520 { 521 int i, j; 522 const struct partition *pp; 523 524 if (lp == NULL) 525 lp = &lab; 526 527 fprintf(f, "# %s:\n", specname); 528 if (allfields) { 529 if (lp->d_type < DKMAXTYPES) 530 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 531 else 532 fprintf(f, "type: %u\n", lp->d_type); 533 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 534 lp->d_typename); 535 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 536 lp->d_packname); 537 fprintf(f, "flags:"); 538 if (lp->d_flags & D_REMOVABLE) 539 fprintf(f, " removeable"); 540 if (lp->d_flags & D_ECC) 541 fprintf(f, " ecc"); 542 if (lp->d_flags & D_BADSECT) 543 fprintf(f, " badsect"); 544 fprintf(f, "\n"); 545 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 546 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 547 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 548 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 549 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 550 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 551 fprintf(f, "rpm: %u\n", lp->d_rpm); 552 fprintf(f, "interleave: %u\n", lp->d_interleave); 553 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 554 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 555 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 556 (u_long)lp->d_headswitch); 557 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 558 (u_long)lp->d_trkseek); 559 fprintf(f, "drivedata: "); 560 for (i = NDDATA - 1; i >= 0; i--) 561 if (lp->d_drivedata[i]) 562 break; 563 if (i < 0) 564 i = 0; 565 for (j = 0; j <= i; j++) 566 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 567 fprintf(f, "\n\n"); 568 } 569 fprintf(f, "%u partitions:\n", lp->d_npartitions); 570 fprintf(f, 571 "# size offset fstype [fsize bsize bps/cpg]\n"); 572 pp = lp->d_partitions; 573 for (i = 0; i < lp->d_npartitions; i++, pp++) { 574 if (pp->p_size) { 575 fprintf(f, " %c: %10lu %10lu ", 'a' + i, 576 (u_long)pp->p_size, (u_long)pp->p_offset); 577 if (pp->p_fstype < FSMAXTYPES) 578 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 579 else 580 fprintf(f, "%8d", pp->p_fstype); 581 switch (pp->p_fstype) { 582 583 case FS_UNUSED: /* XXX */ 584 fprintf(f, " %5lu %5lu %2s", 585 (u_long)pp->p_fsize, 586 (u_long)(pp->p_fsize * pp->p_frag), ""); 587 break; 588 589 case FS_BSDFFS: 590 fprintf(f, " %5lu %5lu %5u", 591 (u_long)pp->p_fsize, 592 (u_long)(pp->p_fsize * pp->p_frag), 593 pp->p_cpg); 594 break; 595 596 case FS_BSDLFS: 597 fprintf(f, " %5lu %5lu %5d", 598 (u_long)pp->p_fsize, 599 (u_long)(pp->p_fsize * pp->p_frag), 600 pp->p_cpg); 601 break; 602 603 default: 604 fprintf(f, "%20.20s", ""); 605 break; 606 } 607 if (i == RAW_PART) { 608 fprintf(f, " # \"raw\" part, don't edit"); 609 } 610 fprintf(f, "\n"); 611 } 612 } 613 fflush(f); 614 } 615 616 static int 617 edit(void) 618 { 619 int c, fd; 620 struct disklabel label; 621 FILE *fp; 622 623 if ((fd = mkstemp(tmpfil)) == -1 || 624 (fp = fdopen(fd, "w")) == NULL) { 625 warnx("can't create %s", tmpfil); 626 return (1); 627 } 628 display(fp, NULL); 629 fclose(fp); 630 for (;;) { 631 if (!editit()) 632 break; 633 fp = fopen(tmpfil, "r"); 634 if (fp == NULL) { 635 warnx("can't reopen %s for reading", tmpfil); 636 break; 637 } 638 bzero((char *)&label, sizeof(label)); 639 c = getasciilabel(fp, &label); 640 fclose(fp); 641 if (c) { 642 lab = label; 643 if (writelabel() == 0) { 644 (void) unlink(tmpfil); 645 return (0); 646 } 647 } 648 printf("re-edit the label? [y]: "); 649 fflush(stdout); 650 c = getchar(); 651 if (c != EOF && c != (int)'\n') 652 while (getchar() != (int)'\n') 653 ; 654 if (c == (int)'n') 655 break; 656 } 657 (void) unlink(tmpfil); 658 return (1); 659 } 660 661 static int 662 editit(void) 663 { 664 int pid, xpid; 665 int locstat, omask; 666 const char *ed; 667 uid_t uid; 668 gid_t gid; 669 670 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 671 while ((pid = fork()) < 0) { 672 if (errno == EPROCLIM) { 673 warnx("you have too many processes"); 674 return(0); 675 } 676 if (errno != EAGAIN) { 677 warn("fork"); 678 return(0); 679 } 680 sleep(1); 681 } 682 if (pid == 0) { 683 sigsetmask(omask); 684 gid = getgid(); 685 if (setresgid(gid, gid, gid) == -1) 686 err(1, "setresgid"); 687 uid = getuid(); 688 if (setresuid(uid, uid, uid) == -1) 689 err(1, "setresuid"); 690 if ((ed = getenv("EDITOR")) == (char *)0) 691 ed = DEFEDITOR; 692 execlp(ed, ed, tmpfil, (char *)0); 693 err(1, "%s", ed); 694 } 695 while ((xpid = wait(&locstat)) >= 0) 696 if (xpid == pid) 697 break; 698 sigsetmask(omask); 699 return(!locstat); 700 } 701 702 static char * 703 skip(char *cp) 704 { 705 706 while (*cp != '\0' && isspace(*cp)) 707 cp++; 708 if (*cp == '\0' || *cp == '#') 709 return (NULL); 710 return (cp); 711 } 712 713 static char * 714 word(char *cp) 715 { 716 char c; 717 718 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 719 cp++; 720 if ((c = *cp) != '\0') { 721 *cp++ = '\0'; 722 if (c != '#') 723 return (skip(cp)); 724 } 725 return (NULL); 726 } 727 728 /* 729 * Read an ascii label in from fd f, 730 * in the same format as that put out by display(), 731 * and fill in lp. 732 */ 733 static int 734 getasciilabel(FILE *f, struct disklabel *lp) 735 { 736 char *cp, *endp; 737 const char **cpp; 738 u_int part; 739 char *tp, line[BUFSIZ]; 740 u_long v; 741 int lineno = 0, errors = 0; 742 int i; 743 744 makelabel("auto", lp); 745 bzero(&part_set, sizeof(part_set)); 746 bzero(&part_size_type, sizeof(part_size_type)); 747 bzero(&part_offset_type, sizeof(part_offset_type)); 748 lp->d_bbsize = BBSIZE; /* XXX */ 749 lp->d_sbsize = 0; /* XXX */ 750 while (fgets(line, sizeof(line) - 1, f)) { 751 lineno++; 752 if ((cp = strchr(line,'\n')) != NULL) 753 *cp = '\0'; 754 cp = skip(line); 755 if (cp == NULL) 756 continue; 757 tp = strchr(cp, ':'); 758 if (tp == NULL) { 759 fprintf(stderr, "line %d: syntax error\n", lineno); 760 errors++; 761 continue; 762 } 763 *tp++ = '\0', tp = skip(tp); 764 if (!strcmp(cp, "type")) { 765 if (tp == NULL) 766 tp = unknown; 767 cpp = dktypenames; 768 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 769 if (*cpp && !strcmp(*cpp, tp)) { 770 lp->d_type = cpp - dktypenames; 771 break; 772 } 773 if (cpp < &dktypenames[DKMAXTYPES]) 774 continue; 775 errno = 0; 776 v = strtoul(tp, &endp, 10); 777 if (errno != 0 || *endp != '\0') 778 v = DKMAXTYPES; 779 if (v >= DKMAXTYPES) 780 fprintf(stderr, "line %d:%s %lu\n", lineno, 781 "Warning, unknown disk type", v); 782 else 783 lp->d_type = v; 784 continue; 785 } 786 if (!strcmp(cp, "flags")) { 787 for (v = 0; (cp = tp) && *cp != '\0';) { 788 tp = word(cp); 789 if (!strcmp(cp, "removeable")) 790 v |= D_REMOVABLE; 791 else if (!strcmp(cp, "ecc")) 792 v |= D_ECC; 793 else if (!strcmp(cp, "badsect")) 794 v |= D_BADSECT; 795 else { 796 fprintf(stderr, 797 "line %d: %s: bad flag\n", 798 lineno, cp); 799 errors++; 800 } 801 } 802 lp->d_flags = v; 803 continue; 804 } 805 if (!strcmp(cp, "drivedata")) { 806 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 807 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 808 tp = word(cp); 809 } 810 continue; 811 } 812 if (sscanf(cp, "%lu partitions", &v) == 1) { 813 if (v > MAXPARTITIONS) { 814 fprintf(stderr, 815 "line %d: bad # of partitions\n", lineno); 816 lp->d_npartitions = MAXPARTITIONS; 817 errors++; 818 } else if (v < DEFPARTITIONS) { 819 fprintf(stderr, 820 "line %d: bad # of partitions\n", lineno); 821 lp->d_npartitions = DEFPARTITIONS; 822 errors++; 823 } else 824 lp->d_npartitions = v; 825 continue; 826 } 827 if (tp == NULL) 828 tp = blank; 829 if (!strcmp(cp, "disk")) { 830 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 831 continue; 832 } 833 if (!strcmp(cp, "label")) { 834 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 835 continue; 836 } 837 if (!strcmp(cp, "bytes/sector")) { 838 v = strtoul(tp, NULL, 10); 839 if (v == 0 || (v % DEV_BSIZE) != 0) { 840 fprintf(stderr, 841 "line %d: %s: bad sector size\n", 842 lineno, tp); 843 errors++; 844 } else 845 lp->d_secsize = v; 846 continue; 847 } 848 if (!strcmp(cp, "sectors/track")) { 849 v = strtoul(tp, NULL, 10); 850 #if (ULONG_MAX != 0xffffffffUL) 851 if (v == 0 || v > 0xffffffff) 852 #else 853 if (v == 0) 854 #endif 855 { 856 fprintf(stderr, "line %d: %s: bad %s\n", 857 lineno, tp, cp); 858 errors++; 859 } else 860 lp->d_nsectors = v; 861 continue; 862 } 863 if (!strcmp(cp, "sectors/cylinder")) { 864 v = strtoul(tp, NULL, 10); 865 if (v == 0) { 866 fprintf(stderr, "line %d: %s: bad %s\n", 867 lineno, tp, cp); 868 errors++; 869 } else 870 lp->d_secpercyl = v; 871 continue; 872 } 873 if (!strcmp(cp, "tracks/cylinder")) { 874 v = strtoul(tp, NULL, 10); 875 if (v == 0) { 876 fprintf(stderr, "line %d: %s: bad %s\n", 877 lineno, tp, cp); 878 errors++; 879 } else 880 lp->d_ntracks = v; 881 continue; 882 } 883 if (!strcmp(cp, "cylinders")) { 884 v = strtoul(tp, NULL, 10); 885 if (v == 0) { 886 fprintf(stderr, "line %d: %s: bad %s\n", 887 lineno, tp, cp); 888 errors++; 889 } else 890 lp->d_ncylinders = v; 891 continue; 892 } 893 if (!strcmp(cp, "sectors/unit")) { 894 v = strtoul(tp, NULL, 10); 895 if (v == 0) { 896 fprintf(stderr, "line %d: %s: bad %s\n", 897 lineno, tp, cp); 898 errors++; 899 } else 900 lp->d_secperunit = v; 901 continue; 902 } 903 if (!strcmp(cp, "rpm")) { 904 v = strtoul(tp, NULL, 10); 905 if (v == 0 || v > USHRT_MAX) { 906 fprintf(stderr, "line %d: %s: bad %s\n", 907 lineno, tp, cp); 908 errors++; 909 } else 910 lp->d_rpm = v; 911 continue; 912 } 913 if (!strcmp(cp, "interleave")) { 914 v = strtoul(tp, NULL, 10); 915 if (v == 0 || v > USHRT_MAX) { 916 fprintf(stderr, "line %d: %s: bad %s\n", 917 lineno, tp, cp); 918 errors++; 919 } else 920 lp->d_interleave = v; 921 continue; 922 } 923 if (!strcmp(cp, "trackskew")) { 924 v = strtoul(tp, NULL, 10); 925 if (v > USHRT_MAX) { 926 fprintf(stderr, "line %d: %s: bad %s\n", 927 lineno, tp, cp); 928 errors++; 929 } else 930 lp->d_trackskew = v; 931 continue; 932 } 933 if (!strcmp(cp, "cylinderskew")) { 934 v = strtoul(tp, NULL, 10); 935 if (v > USHRT_MAX) { 936 fprintf(stderr, "line %d: %s: bad %s\n", 937 lineno, tp, cp); 938 errors++; 939 } else 940 lp->d_cylskew = v; 941 continue; 942 } 943 if (!strcmp(cp, "headswitch")) { 944 v = strtoul(tp, NULL, 10); 945 lp->d_headswitch = v; 946 continue; 947 } 948 if (!strcmp(cp, "track-to-track seek")) { 949 v = strtoul(tp, NULL, 10); 950 lp->d_trkseek = v; 951 continue; 952 } 953 /* the ':' was removed above */ 954 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 955 fprintf(stderr, 956 "line %d: %s: Unknown disklabel field\n", lineno, 957 cp); 958 errors++; 959 continue; 960 } 961 962 /* Process a partition specification line. */ 963 part = *cp - 'a'; 964 if (part >= lp->d_npartitions) { 965 fprintf(stderr, 966 "line %d: partition name out of range a-%c: %s\n", 967 lineno, 'a' + lp->d_npartitions - 1, cp); 968 errors++; 969 continue; 970 } 971 part_set[part] = 1; 972 973 if (getasciipartspec(tp, lp, part, lineno) != 0) { 974 errors++; 975 break; 976 } 977 } 978 errors += checklabel(lp); 979 return (errors == 0); 980 } 981 982 #define NXTNUM(n) do { \ 983 if (tp == NULL) { \ 984 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 985 return (1); \ 986 } else { \ 987 cp = tp, tp = word(cp); \ 988 (n) = strtoul(cp, NULL, 10); \ 989 } \ 990 } while (0) 991 992 /* retain 1 character following number */ 993 #define NXTWORD(w,n) do { \ 994 if (tp == NULL) { \ 995 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 996 return (1); \ 997 } else { \ 998 char *tmp; \ 999 cp = tp, tp = word(cp); \ 1000 (n) = strtoul(cp, &tmp, 10); \ 1001 if (tmp) (w) = *tmp; \ 1002 } \ 1003 } while (0) 1004 1005 /* 1006 * Read a partition line into partition `part' in the specified disklabel. 1007 * Return 0 on success, 1 on failure. 1008 */ 1009 static int 1010 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1011 { 1012 struct partition *pp; 1013 char *cp, *endp; 1014 const char **cpp; 1015 u_long v; 1016 1017 pp = &lp->d_partitions[part]; 1018 cp = NULL; 1019 1020 v = 0; 1021 NXTWORD(part_size_type[part],v); 1022 if (v == 0 && part_size_type[part] != '*') { 1023 fprintf(stderr, 1024 "line %d: %s: bad partition size\n", lineno, cp); 1025 return (1); 1026 } 1027 pp->p_size = v; 1028 1029 v = 0; 1030 NXTWORD(part_offset_type[part],v); 1031 if (v == 0 && part_offset_type[part] != '*' && 1032 part_offset_type[part] != '\0') { 1033 fprintf(stderr, 1034 "line %d: %s: bad partition offset\n", lineno, cp); 1035 return (1); 1036 } 1037 pp->p_offset = v; 1038 if (tp == NULL) { 1039 fprintf(stderr, "line %d: missing file system type\n", lineno); 1040 return (1); 1041 } 1042 cp = tp, tp = word(cp); 1043 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1044 if (*cpp && !strcmp(*cpp, cp)) 1045 break; 1046 if (*cpp != NULL) { 1047 pp->p_fstype = cpp - fstypenames; 1048 } else { 1049 if (isdigit(*cp)) { 1050 errno = 0; 1051 v = strtoul(cp, &endp, 10); 1052 if (errno != 0 || *endp != '\0') 1053 v = FSMAXTYPES; 1054 } else 1055 v = FSMAXTYPES; 1056 if (v >= FSMAXTYPES) { 1057 fprintf(stderr, 1058 "line %d: Warning, unknown file system type %s\n", 1059 lineno, cp); 1060 v = FS_UNUSED; 1061 } 1062 pp->p_fstype = v; 1063 } 1064 1065 switch (pp->p_fstype) { 1066 case FS_UNUSED: 1067 case FS_BSDFFS: 1068 case FS_BSDLFS: 1069 /* accept defaults for fsize/frag/cpg */ 1070 if (tp) { 1071 NXTNUM(pp->p_fsize); 1072 if (pp->p_fsize == 0) 1073 break; 1074 NXTNUM(v); 1075 pp->p_frag = v / pp->p_fsize; 1076 if (tp != NULL) 1077 NXTNUM(pp->p_cpg); 1078 } 1079 /* else default to 0's */ 1080 break; 1081 default: 1082 break; 1083 } 1084 return (0); 1085 } 1086 1087 /* 1088 * Check disklabel for errors and fill in 1089 * derived fields according to supplied values. 1090 */ 1091 static int 1092 checklabel(struct disklabel *lp) 1093 { 1094 struct partition *pp; 1095 int i, errors = 0; 1096 char part; 1097 u_long base_offset, needed, total_size, total_percent, current_offset; 1098 long free_space; 1099 int seen_default_offset; 1100 int hog_part; 1101 int j; 1102 struct partition *pp2; 1103 1104 if (lp == NULL) 1105 lp = &lab; 1106 1107 if (allfields) { 1108 1109 if (lp->d_secsize == 0) { 1110 fprintf(stderr, "sector size 0\n"); 1111 return (1); 1112 } 1113 if (lp->d_nsectors == 0) { 1114 fprintf(stderr, "sectors/track 0\n"); 1115 return (1); 1116 } 1117 if (lp->d_ntracks == 0) { 1118 fprintf(stderr, "tracks/cylinder 0\n"); 1119 return (1); 1120 } 1121 if (lp->d_ncylinders == 0) { 1122 fprintf(stderr, "cylinders/unit 0\n"); 1123 errors++; 1124 } 1125 if (lp->d_rpm == 0) 1126 warnx("revolutions/minute 0"); 1127 if (lp->d_secpercyl == 0) 1128 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1129 if (lp->d_secperunit == 0) 1130 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1131 if (lp->d_bbsize == 0) { 1132 fprintf(stderr, "boot block size 0\n"); 1133 errors++; 1134 } else if (lp->d_bbsize % lp->d_secsize) 1135 warnx("boot block size %% sector-size != 0"); 1136 if (lp->d_npartitions > MAXPARTITIONS) { 1137 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1138 (u_long)lp->d_npartitions, MAXPARTITIONS); 1139 errors++; 1140 } 1141 if (lp->d_npartitions < DEFPARTITIONS) { 1142 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)", 1143 (u_long)lp->d_npartitions, DEFPARTITIONS); 1144 errors++; 1145 } 1146 } else { 1147 struct disklabel *vl; 1148 1149 vl = getvirginlabel(); 1150 if (lp->d_secsize == 0) 1151 lp->d_secsize = vl->d_secsize; 1152 if (lp->d_nsectors == 0) 1153 lp->d_nsectors = vl->d_nsectors; 1154 if (lp->d_ntracks == 0) 1155 lp->d_ntracks = vl->d_ntracks; 1156 if (lp->d_ncylinders == 0) 1157 lp->d_ncylinders = vl->d_ncylinders; 1158 if (lp->d_rpm == 0) 1159 lp->d_rpm = vl->d_rpm; 1160 if (lp->d_interleave == 0) 1161 lp->d_interleave = vl->d_interleave; 1162 if (lp->d_secpercyl == 0) 1163 lp->d_secpercyl = vl->d_secpercyl; 1164 if (lp->d_secperunit == 0 || 1165 lp->d_secperunit > vl->d_secperunit) 1166 lp->d_secperunit = vl->d_secperunit; 1167 if (lp->d_bbsize == 0) 1168 lp->d_bbsize = vl->d_bbsize; 1169 if (lp->d_npartitions < DEFPARTITIONS || 1170 lp->d_npartitions > MAXPARTITIONS) 1171 lp->d_npartitions = vl->d_npartitions; 1172 } 1173 1174 1175 /* first allocate space to the partitions, then offsets */ 1176 total_size = 0; /* in sectors */ 1177 total_percent = 0; /* in percent */ 1178 hog_part = -1; 1179 /* find all fixed partitions */ 1180 for (i = 0; i < lp->d_npartitions; i++) { 1181 pp = &lp->d_partitions[i]; 1182 if (part_set[i]) { 1183 if (part_size_type[i] == '*') { 1184 if (i == RAW_PART) { 1185 pp->p_size = lp->d_secperunit; 1186 } else { 1187 if (hog_part != -1) 1188 warnx("Too many '*' partitions (%c and %c)", 1189 hog_part + 'a',i + 'a'); 1190 else 1191 hog_part = i; 1192 } 1193 } else { 1194 off_t size; 1195 1196 size = pp->p_size; 1197 switch (part_size_type[i]) { 1198 case '%': 1199 total_percent += size; 1200 break; 1201 case 't': 1202 case 'T': 1203 size *= 1024ULL; 1204 /* FALLTHROUGH */ 1205 case 'g': 1206 case 'G': 1207 size *= 1024ULL; 1208 /* FALLTHROUGH */ 1209 case 'm': 1210 case 'M': 1211 size *= 1024ULL; 1212 /* FALLTHROUGH */ 1213 case 'k': 1214 case 'K': 1215 size *= 1024ULL; 1216 break; 1217 case '\0': 1218 break; 1219 default: 1220 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)", 1221 part_size_type[i], i + 'a'); 1222 break; 1223 } 1224 /* don't count %'s yet */ 1225 if (part_size_type[i] != '%') { 1226 /* 1227 * for all not in sectors, convert to 1228 * sectors 1229 */ 1230 if (part_size_type[i] != '\0') { 1231 if (size % lp->d_secsize != 0) 1232 warnx("partition %c not an integer number of sectors", 1233 i + 'a'); 1234 size /= lp->d_secsize; 1235 pp->p_size = size; 1236 } 1237 /* else already in sectors */ 1238 if (i != RAW_PART) 1239 total_size += size; 1240 } 1241 } 1242 } 1243 } 1244 1245 /* Find out the total free space, excluding the boot block area. */ 1246 base_offset = BBSIZE / secsize; 1247 free_space = 0; 1248 for (i = 0; i < lp->d_npartitions; i++) { 1249 pp = &lp->d_partitions[i]; 1250 if (!part_set[i] || i == RAW_PART || 1251 part_size_type[i] == '%' || part_size_type[i] == '*') 1252 continue; 1253 if (pp->p_offset > base_offset) 1254 free_space += pp->p_offset - base_offset; 1255 if (pp->p_offset + pp->p_size > base_offset) 1256 base_offset = pp->p_offset + pp->p_size; 1257 } 1258 if (base_offset < lp->d_secperunit) 1259 free_space += lp->d_secperunit - base_offset; 1260 1261 /* handle % partitions - note %'s don't need to add up to 100! */ 1262 if (total_percent != 0) { 1263 if (total_percent > 100) { 1264 fprintf(stderr,"total percentage %lu is greater than 100\n", 1265 total_percent); 1266 errors++; 1267 } 1268 1269 if (free_space > 0) { 1270 for (i = 0; i < lp->d_npartitions; i++) { 1271 pp = &lp->d_partitions[i]; 1272 if (part_set[i] && part_size_type[i] == '%') { 1273 /* careful of overflows! and integer roundoff */ 1274 pp->p_size = ((double)pp->p_size/100) * free_space; 1275 total_size += pp->p_size; 1276 1277 /* FIX we can lose a sector or so due to roundoff per 1278 partition. A more complex algorithm could avoid that */ 1279 } 1280 } 1281 } else { 1282 fprintf(stderr, 1283 "%ld sectors available to give to '*' and '%%' partitions\n", 1284 free_space); 1285 errors++; 1286 /* fix? set all % partitions to size 0? */ 1287 } 1288 } 1289 /* give anything remaining to the hog partition */ 1290 if (hog_part != -1) { 1291 /* 1292 * Find the range of offsets usable by '*' partitions around 1293 * the hog partition and how much space they need. 1294 */ 1295 needed = 0; 1296 base_offset = BBSIZE / secsize; 1297 for (i = hog_part - 1; i >= 0; i--) { 1298 pp = &lp->d_partitions[i]; 1299 if (!part_set[i] || i == RAW_PART) 1300 continue; 1301 if (part_offset_type[i] == '*') { 1302 needed += pp->p_size; 1303 continue; 1304 } 1305 base_offset = pp->p_offset + pp->p_size; 1306 break; 1307 } 1308 current_offset = lp->d_secperunit; 1309 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1310 pp = &lp->d_partitions[i]; 1311 if (!part_set[i] || i == RAW_PART) 1312 continue; 1313 if (part_offset_type[i] == '*') { 1314 needed += pp->p_size; 1315 continue; 1316 } 1317 current_offset = pp->p_offset; 1318 } 1319 1320 if (current_offset - base_offset <= needed) { 1321 fprintf(stderr, "Cannot find space for partition %c\n", 1322 hog_part + 'a'); 1323 fprintf(stderr, 1324 "Need more than %lu sectors between %lu and %lu\n", 1325 needed, base_offset, current_offset); 1326 errors++; 1327 lp->d_partitions[hog_part].p_size = 0; 1328 } else { 1329 lp->d_partitions[hog_part].p_size = current_offset - 1330 base_offset - needed; 1331 total_size += lp->d_partitions[hog_part].p_size; 1332 } 1333 } 1334 1335 /* Now set the offsets for each partition */ 1336 current_offset = BBSIZE / secsize; /* in sectors */ 1337 seen_default_offset = 0; 1338 for (i = 0; i < lp->d_npartitions; i++) { 1339 part = 'a' + i; 1340 pp = &lp->d_partitions[i]; 1341 if (part_set[i]) { 1342 if (part_offset_type[i] == '*') { 1343 if (i == RAW_PART) { 1344 pp->p_offset = 0; 1345 } else { 1346 pp->p_offset = current_offset; 1347 seen_default_offset = 1; 1348 } 1349 } else { 1350 /* allow them to be out of order for old-style tables */ 1351 if (pp->p_offset < current_offset && 1352 seen_default_offset && i != RAW_PART && 1353 pp->p_fstype != FS_VINUM) { 1354 fprintf(stderr, 1355 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1356 (long)pp->p_offset,i+'a',current_offset); 1357 fprintf(stderr, 1358 "Labels with any *'s for offset must be in ascending order by sector\n"); 1359 errors++; 1360 } else if (pp->p_offset != current_offset && 1361 i != RAW_PART && seen_default_offset) { 1362 /* 1363 * this may give unneeded warnings if 1364 * partitions are out-of-order 1365 */ 1366 warnx( 1367 "Offset %ld for partition %c doesn't match expected value %ld", 1368 (long)pp->p_offset, i + 'a', current_offset); 1369 } 1370 } 1371 if (i != RAW_PART) 1372 current_offset = pp->p_offset + pp->p_size; 1373 } 1374 } 1375 1376 for (i = 0; i < lp->d_npartitions; i++) { 1377 part = 'a' + i; 1378 pp = &lp->d_partitions[i]; 1379 if (pp->p_size == 0 && pp->p_offset != 0) 1380 warnx("partition %c: size 0, but offset %lu", 1381 part, (u_long)pp->p_offset); 1382 #ifdef notdef 1383 if (pp->p_size % lp->d_secpercyl) 1384 warnx("partition %c: size %% cylinder-size != 0", 1385 part); 1386 if (pp->p_offset % lp->d_secpercyl) 1387 warnx("partition %c: offset %% cylinder-size != 0", 1388 part); 1389 #endif 1390 if (pp->p_offset > lp->d_secperunit) { 1391 fprintf(stderr, 1392 "partition %c: offset past end of unit\n", part); 1393 errors++; 1394 } 1395 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1396 fprintf(stderr, 1397 "partition %c: partition extends past end of unit\n", 1398 part); 1399 errors++; 1400 } 1401 if (i == RAW_PART) { 1402 if (pp->p_fstype != FS_UNUSED) 1403 warnx("partition %c is not marked as unused!",part); 1404 if (pp->p_offset != 0) 1405 warnx("partition %c doesn't start at 0!",part); 1406 if (pp->p_size != lp->d_secperunit) 1407 warnx("partition %c doesn't cover the whole unit!",part); 1408 1409 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1410 (pp->p_size != lp->d_secperunit)) { 1411 warnx("An incorrect partition %c may cause problems for " 1412 "standard system utilities",part); 1413 } 1414 } 1415 1416 /* check for overlaps */ 1417 /* this will check for all possible overlaps once and only once */ 1418 for (j = 0; j < i; j++) { 1419 pp2 = &lp->d_partitions[j]; 1420 if (j != RAW_PART && i != RAW_PART && 1421 pp->p_fstype != FS_VINUM && 1422 pp2->p_fstype != FS_VINUM && 1423 part_set[i] && part_set[j]) { 1424 if (pp2->p_offset < pp->p_offset + pp->p_size && 1425 (pp2->p_offset + pp2->p_size > pp->p_offset || 1426 pp2->p_offset >= pp->p_offset)) { 1427 fprintf(stderr,"partitions %c and %c overlap!\n", 1428 j + 'a', i + 'a'); 1429 errors++; 1430 } 1431 } 1432 } 1433 } 1434 for (; i < lp->d_npartitions; i++) { 1435 part = 'a' + i; 1436 pp = &lp->d_partitions[i]; 1437 if (pp->p_size || pp->p_offset) 1438 warnx("unused partition %c: size %d offset %lu", 1439 'a' + i, pp->p_size, (u_long)pp->p_offset); 1440 } 1441 return (errors); 1442 } 1443 1444 /* 1445 * When operating on a "virgin" disk, try getting an initial label 1446 * from the associated device driver. This might work for all device 1447 * drivers that are able to fetch some initial device parameters 1448 * without even having access to a (BSD) disklabel, like SCSI disks, 1449 * most IDE drives, or vn devices. 1450 * 1451 * The device name must be given in its "canonical" form. 1452 */ 1453 static struct disklabel * 1454 getvirginlabel(void) 1455 { 1456 static struct disklabel loclab; 1457 struct partition *dp; 1458 int f; 1459 u_int u; 1460 1461 if ((f = open(specname, O_RDONLY)) == -1) { 1462 warn("cannot open %s", specname); 1463 return (NULL); 1464 } 1465 1466 if (is_file) 1467 get_file_parms(f); 1468 else { 1469 mediasize = g_mediasize(f); 1470 secsize = g_sectorsize(f); 1471 if (secsize < 0 || mediasize < 0) { 1472 close (f); 1473 return (NULL); 1474 } 1475 } 1476 memset(&loclab, 0, sizeof loclab); 1477 loclab.d_magic = DISKMAGIC; 1478 loclab.d_magic2 = DISKMAGIC; 1479 loclab.d_secsize = secsize; 1480 loclab.d_secperunit = mediasize / secsize; 1481 1482 /* 1483 * Nobody in these enlightened days uses the CHS geometry for 1484 * anything, but nonetheless try to get it right. If we fail 1485 * to get any good ideas from the device, construct something 1486 * which is IBM-PC friendly. 1487 */ 1488 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1489 loclab.d_nsectors = u; 1490 else 1491 loclab.d_nsectors = 63; 1492 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1493 loclab.d_ntracks = u; 1494 else if (loclab.d_secperunit <= 63*1*1024) 1495 loclab.d_ntracks = 1; 1496 else if (loclab.d_secperunit <= 63*16*1024) 1497 loclab.d_ntracks = 16; 1498 else 1499 loclab.d_ntracks = 255; 1500 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1501 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1502 loclab.d_npartitions = DEFPARTITIONS; 1503 1504 /* Various (unneeded) compat stuff */ 1505 loclab.d_rpm = 3600; 1506 loclab.d_bbsize = BBSIZE; 1507 loclab.d_interleave = 1; 1508 strncpy(loclab.d_typename, "amnesiac", 1509 sizeof(loclab.d_typename)); 1510 1511 dp = &loclab.d_partitions[RAW_PART]; 1512 dp->p_size = loclab.d_secperunit; 1513 loclab.d_checksum = dkcksum(&loclab); 1514 close (f); 1515 return (&loclab); 1516 } 1517 1518 static void 1519 usage(void) 1520 { 1521 1522 fprintf(stderr, 1523 "%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", 1524 "usage: bsdlabel disk", 1525 "\t\t(to read label)", 1526 " bsdlabel -w [-n] [-m machine] disk [type]", 1527 "\t\t(to write label with existing boot program)", 1528 " bsdlabel -e [-n] [-m machine] disk", 1529 "\t\t(to edit label)", 1530 " bsdlabel -R [-n] [-m machine] disk protofile", 1531 "\t\t(to restore label with existing boot program)", 1532 " bsdlabel -B [-b boot] [-m machine] disk", 1533 "\t\t(to install boot program with existing on-disk label)", 1534 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1535 "\t\t(to write label and install boot program)", 1536 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1537 "\t\t(to restore label and install boot program)" 1538 ); 1539 exit(1); 1540 } 1541