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