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 /* FIX! These are too low, but are traditional */ 82 #define DEFAULT_NEWFS_BLOCK 8192U 83 #define DEFAULT_NEWFS_FRAG 1024U 84 #define DEFAULT_NEWFS_CPG 16U 85 86 #define BIG_NEWFS_BLOCK 16384U 87 #define BIG_NEWFS_FRAG 2048U 88 #define BIG_NEWFS_CPG 64U 89 90 static void makelabel(const char *, struct disklabel *); 91 static int writelabel(void); 92 static int readlabel(int flag); 93 static void display(FILE *, const struct disklabel *); 94 static int edit(void); 95 static int editit(void); 96 static char *skip(char *); 97 static char *word(char *); 98 static int getasciilabel(FILE *, struct disklabel *); 99 static int getasciipartspec(char *, struct disklabel *, int, int); 100 static int checklabel(struct disklabel *); 101 static void usage(void); 102 static struct disklabel *getvirginlabel(void); 103 104 #define DEFEDITOR _PATH_VI 105 106 static char *dkname; 107 static char *specname; 108 static char tmpfil[] = PATH_TMPFILE; 109 110 static struct disklabel lab; 111 static u_char bootarea[BBSIZE]; 112 static off_t mediasize; 113 static u_int secsize; 114 static char blank[] = ""; 115 static char unknown[] = "unknown"; 116 117 #define MAX_PART ('z') 118 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 119 static char part_size_type[MAX_NUM_PARTS]; 120 static char part_offset_type[MAX_NUM_PARTS]; 121 static int part_set[MAX_NUM_PARTS]; 122 123 static int installboot; /* non-zero if we should install a boot program */ 124 static int allfields; /* present all fields in edit */ 125 static char const *xxboot; /* primary boot */ 126 127 static off_t mbroffset; 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 */ 144 145 int 146 main(int argc, char *argv[]) 147 { 148 FILE *t; 149 int ch, error = 0; 150 char const *name = 0; 151 152 while ((ch = getopt(argc, argv, "ABb:em:nRrs:w")) != -1) 153 switch (ch) { 154 case 'A': 155 allfields = 1; 156 break; 157 case 'B': 158 ++installboot; 159 break; 160 case 'b': 161 xxboot = optarg; 162 break; 163 case 'm': 164 if (!strcmp(optarg, "i386")) { 165 labelsoffset = 1; 166 labeloffset = 0; 167 bbsize = 8192; 168 alphacksum = 0; 169 } else if (!strcmp(optarg, "pc98")) { 170 labelsoffset = 1; 171 labeloffset = 0; 172 bbsize = 8192; 173 alphacksum = 0; 174 } else if (!strcmp(optarg, "alpha")) { 175 labelsoffset = 0; 176 labeloffset = 64; 177 bbsize = 8192; 178 alphacksum = 1; 179 } else if (!strcmp(optarg, "ia64")) { 180 labelsoffset = 1; 181 labeloffset = 0; 182 bbsize = 8192; 183 alphacksum = 0; 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(); 221 222 /* Figure out the names of the thing we're working on */ 223 if (argv[0][0] != '/') { 224 dkname = argv[0]; 225 asprintf(&specname, "%s%s", _PATH_DEV, argv[0]); 226 } else { 227 dkname = strrchr(argv[0], '/'); 228 dkname++; 229 specname = argv[0]; 230 } 231 232 if (installboot && op == UNSPEC) 233 op = WRITEBOOT; 234 else if (op == UNSPEC) 235 op = READ; 236 237 switch(op) { 238 239 case UNSPEC: 240 break; 241 242 case EDIT: 243 if (argc != 1) 244 usage(); 245 readlabel(1); 246 error = edit(); 247 break; 248 249 case READ: 250 if (argc != 1) 251 usage(); 252 readlabel(1); 253 display(stdout, NULL); 254 error = checklabel(NULL); 255 break; 256 257 case RESTORE: 258 if (argc != 2) 259 usage(); 260 if (!(t = fopen(argv[1], "r"))) 261 err(4, "fopen %s", argv[1]); 262 readlabel(0); 263 if (!getasciilabel(t, &lab)) 264 exit(1); 265 error = writelabel(); 266 break; 267 268 case WRITE: 269 if (argc == 2) 270 name = argv[1]; 271 else if (argc == 1) 272 name = "auto"; 273 else 274 usage(); 275 readlabel(0); 276 makelabel(name, &lab); 277 if (checklabel(NULL) == 0) 278 error = writelabel(); 279 break; 280 281 case WRITEBOOT: 282 283 readlabel(1); 284 if (argc == 2) 285 makelabel(argv[1], &lab); 286 if (checklabel(NULL) == 0) 287 error = writelabel(); 288 break; 289 } 290 exit(error); 291 } 292 293 /* 294 * Construct a prototype disklabel from /etc/disktab. 295 */ 296 static void 297 makelabel(const char *type, struct disklabel *lp) 298 { 299 struct disklabel *dp; 300 301 if (strcmp(type, "auto") == 0) 302 dp = getvirginlabel(); 303 else 304 dp = getdiskbyname(type); 305 if (dp == NULL) 306 errx(1, "%s: unknown disk type", type); 307 *lp = *dp; 308 bzero(lp->d_packname, sizeof(lp->d_packname)); 309 } 310 311 static void 312 readboot(void) 313 { 314 int fd, i; 315 struct stat st; 316 317 if (xxboot == NULL) 318 xxboot = "/boot/boot"; 319 fd = open(xxboot, O_RDONLY); 320 if (fd < 0) 321 err(1, "cannot open %s", xxboot); 322 fstat(fd, &st); 323 if (alphacksum && st.st_size <= BBSIZE - 512) { 324 i = read(fd, bootarea + 512, st.st_size); 325 if (i != st.st_size) 326 err(1, "read error %s", xxboot); 327 return; 328 } else if ((!alphacksum) && st.st_size <= BBSIZE) { 329 i = read(fd, bootarea, st.st_size); 330 if (i != st.st_size) 331 err(1, "read error %s", xxboot); 332 return; 333 } 334 errx(1, "boot code %s is wrong size", xxboot); 335 } 336 337 static int 338 writelabel(void) 339 { 340 uint64_t *p, sum; 341 int i, fd; 342 struct gctl_req *grq; 343 char const *errstr; 344 struct disklabel *lp = &lab; 345 346 if (disable_write) { 347 warnx("write to disk label supressed - label was as follows:"); 348 display(stdout, NULL); 349 return (0); 350 } 351 352 lp->d_magic = DISKMAGIC; 353 lp->d_magic2 = DISKMAGIC; 354 lp->d_checksum = 0; 355 lp->d_checksum = dkcksum(lp); 356 if (installboot) 357 readboot(); 358 for (i = 0; i < lab.d_npartitions; i++) 359 if (lab.d_partitions[i].p_size) 360 lab.d_partitions[i].p_offset += mbroffset; 361 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * secsize, 362 lp); 363 if (alphacksum) { 364 /* Generate the bootblock checksum for the SRM console. */ 365 for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++) 366 sum += p[i]; 367 p[63] = sum; 368 } 369 370 fd = open(specname, O_RDWR); 371 if (fd < 0) { 372 grq = gctl_get_handle(); 373 gctl_ro_param(grq, "verb", -1, "write label"); 374 gctl_ro_param(grq, "class", -1, "BSD"); 375 gctl_ro_param(grq, "geom", -1, dkname); 376 gctl_ro_param(grq, "label", 148+16*8, 377 bootarea + labeloffset + labelsoffset * secsize); 378 errstr = gctl_issue(grq); 379 if (errstr != NULL) { 380 warnx("%s", errstr); 381 gctl_free(grq); 382 return(1); 383 } 384 gctl_free(grq); 385 if (installboot) { 386 grq = gctl_get_handle(); 387 gctl_ro_param(grq, "verb", -1, "write bootcode"); 388 gctl_ro_param(grq, "class", -1, "BSD"); 389 gctl_ro_param(grq, "geom", -1, dkname); 390 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 391 errstr = gctl_issue(grq); 392 if (errstr != NULL) { 393 warnx("%s", errstr); 394 gctl_free(grq); 395 return (1); 396 } 397 gctl_free(grq); 398 } 399 } else { 400 if (write(fd, bootarea, bbsize) != bbsize) { 401 warn("write %s", specname); 402 close (fd); 403 return (1); 404 } 405 close (fd); 406 } 407 return (0); 408 } 409 410 /* 411 * Fetch disklabel for disk. 412 * Use ioctl to get label unless -r flag is given. 413 */ 414 static int 415 readlabel(int flag) 416 { 417 int f, i; 418 int error; 419 struct gctl_req *grq; 420 char const *errstr; 421 422 f = open(specname, O_RDONLY); 423 if (f < 0) 424 err(1, specname); 425 /* New world order */ 426 if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || 427 (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { 428 err(4, "cannot get disk geometry"); 429 } 430 (void)lseek(f, (off_t)0, SEEK_SET); 431 if (read(f, bootarea, BBSIZE) != BBSIZE) 432 err(4, "%s read", specname); 433 close (f); 434 error = bsd_disklabel_le_dec( 435 bootarea + (labeloffset + labelsoffset * secsize), 436 &lab, MAXPARTITIONS); 437 if (flag && error) 438 errx(1, "%s: no valid label found", specname); 439 440 grq = gctl_get_handle(); 441 gctl_ro_param(grq, "verb", -1, "read mbroffset"); 442 gctl_ro_param(grq, "class", -1, "BSD"); 443 gctl_ro_param(grq, "geom", -1, dkname); 444 gctl_rw_param(grq, "mbroffset", sizeof(mbroffset), &mbroffset); 445 errstr = gctl_issue(grq); 446 if (errstr != NULL) { 447 mbroffset = 0; 448 gctl_free(grq); 449 return (error); 450 } 451 mbroffset /= lab.d_secsize; 452 if (lab.d_partitions[RAW_PART].p_offset == mbroffset) 453 for (i = 0; i < lab.d_npartitions; i++) 454 if (lab.d_partitions[i].p_size) 455 lab.d_partitions[i].p_offset -= mbroffset; 456 return (error); 457 } 458 459 460 static void 461 display(FILE *f, const struct disklabel *lp) 462 { 463 int i, j; 464 const struct partition *pp; 465 466 if (lp == NULL) 467 lp = &lab; 468 469 fprintf(f, "# %s:\n", specname); 470 if (allfields) { 471 if (lp->d_type < DKMAXTYPES) 472 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 473 else 474 fprintf(f, "type: %u\n", lp->d_type); 475 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 476 lp->d_typename); 477 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 478 lp->d_packname); 479 fprintf(f, "flags:"); 480 if (lp->d_flags & D_REMOVABLE) 481 fprintf(f, " removeable"); 482 if (lp->d_flags & D_ECC) 483 fprintf(f, " ecc"); 484 if (lp->d_flags & D_BADSECT) 485 fprintf(f, " badsect"); 486 fprintf(f, "\n"); 487 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 488 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 489 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 490 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 491 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 492 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 493 fprintf(f, "rpm: %u\n", lp->d_rpm); 494 fprintf(f, "interleave: %u\n", lp->d_interleave); 495 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 496 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 497 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 498 (u_long)lp->d_headswitch); 499 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 500 (u_long)lp->d_trkseek); 501 fprintf(f, "drivedata: "); 502 for (i = NDDATA - 1; i >= 0; i--) 503 if (lp->d_drivedata[i]) 504 break; 505 if (i < 0) 506 i = 0; 507 for (j = 0; j <= i; j++) 508 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 509 fprintf(f, "\n\n"); 510 } 511 fprintf(f, "%u partitions:\n", lp->d_npartitions); 512 fprintf(f, 513 "# size offset fstype [fsize bsize bps/cpg]\n"); 514 pp = lp->d_partitions; 515 for (i = 0; i < lp->d_npartitions; i++, pp++) { 516 if (pp->p_size) { 517 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 518 (u_long)pp->p_size, (u_long)pp->p_offset); 519 if (pp->p_fstype < FSMAXTYPES) 520 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 521 else 522 fprintf(f, "%8d", pp->p_fstype); 523 switch (pp->p_fstype) { 524 525 case FS_UNUSED: /* XXX */ 526 fprintf(f, " %5lu %5lu %5.5s ", 527 (u_long)pp->p_fsize, 528 (u_long)(pp->p_fsize * pp->p_frag), ""); 529 break; 530 531 case FS_BSDFFS: 532 fprintf(f, " %5lu %5lu %5u ", 533 (u_long)pp->p_fsize, 534 (u_long)(pp->p_fsize * pp->p_frag), 535 pp->p_cpg); 536 break; 537 538 case FS_BSDLFS: 539 fprintf(f, " %5lu %5lu %5d", 540 (u_long)pp->p_fsize, 541 (u_long)(pp->p_fsize * pp->p_frag), 542 pp->p_cpg); 543 break; 544 545 default: 546 fprintf(f, "%20.20s", ""); 547 break; 548 } 549 if (i == RAW_PART) { 550 fprintf(f, " # \"raw\" part, don't edit"); 551 } 552 fprintf(f, "\n"); 553 } 554 } 555 fflush(f); 556 } 557 558 static int 559 edit(void) 560 { 561 int c, fd; 562 struct disklabel label; 563 FILE *fp; 564 565 if ((fd = mkstemp(tmpfil)) == -1 || 566 (fp = fdopen(fd, "w")) == NULL) { 567 warnx("can't create %s", tmpfil); 568 return (1); 569 } 570 display(fp, NULL); 571 fclose(fp); 572 for (;;) { 573 if (!editit()) 574 break; 575 fp = fopen(tmpfil, "r"); 576 if (fp == NULL) { 577 warnx("can't reopen %s for reading", tmpfil); 578 break; 579 } 580 bzero((char *)&label, sizeof(label)); 581 c = getasciilabel(fp, &label); 582 fclose(fp); 583 if (c) { 584 lab = label; 585 if (writelabel() == 0) { 586 (void) unlink(tmpfil); 587 return (0); 588 } 589 } 590 printf("re-edit the label? [y]: "); 591 fflush(stdout); 592 c = getchar(); 593 if (c != EOF && c != (int)'\n') 594 while (getchar() != (int)'\n') 595 ; 596 if (c == (int)'n') 597 break; 598 } 599 (void) unlink(tmpfil); 600 return (1); 601 } 602 603 static int 604 editit(void) 605 { 606 int pid, xpid; 607 int locstat, omask; 608 const char *ed; 609 610 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 611 while ((pid = fork()) < 0) { 612 if (errno == EPROCLIM) { 613 warnx("you have too many processes"); 614 return(0); 615 } 616 if (errno != EAGAIN) { 617 warn("fork"); 618 return(0); 619 } 620 sleep(1); 621 } 622 if (pid == 0) { 623 sigsetmask(omask); 624 setgid(getgid()); 625 setuid(getuid()); 626 if ((ed = getenv("EDITOR")) == (char *)0) 627 ed = DEFEDITOR; 628 execlp(ed, ed, tmpfil, (char *)0); 629 err(1, "%s", ed); 630 } 631 while ((xpid = wait(&locstat)) >= 0) 632 if (xpid == pid) 633 break; 634 sigsetmask(omask); 635 return(!locstat); 636 } 637 638 static char * 639 skip(char *cp) 640 { 641 642 while (*cp != '\0' && isspace(*cp)) 643 cp++; 644 if (*cp == '\0' || *cp == '#') 645 return (NULL); 646 return (cp); 647 } 648 649 static char * 650 word(char *cp) 651 { 652 char c; 653 654 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 655 cp++; 656 if ((c = *cp) != '\0') { 657 *cp++ = '\0'; 658 if (c != '#') 659 return (skip(cp)); 660 } 661 return (NULL); 662 } 663 664 /* 665 * Read an ascii label in from fd f, 666 * in the same format as that put out by display(), 667 * and fill in lp. 668 */ 669 static int 670 getasciilabel(FILE *f, struct disklabel *lp) 671 { 672 char *cp; 673 const char **cpp; 674 u_int part; 675 char *tp, line[BUFSIZ]; 676 u_long v; 677 int lineno = 0, errors = 0; 678 int i; 679 680 makelabel("auto", lp); 681 bzero(&part_set, sizeof(part_set)); 682 bzero(&part_size_type, sizeof(part_size_type)); 683 bzero(&part_offset_type, sizeof(part_offset_type)); 684 lp->d_bbsize = BBSIZE; /* XXX */ 685 lp->d_sbsize = 0; /* XXX */ 686 while (fgets(line, sizeof(line) - 1, f)) { 687 lineno++; 688 if ((cp = index(line,'\n')) != 0) 689 *cp = '\0'; 690 cp = skip(line); 691 if (cp == NULL) 692 continue; 693 tp = index(cp, ':'); 694 if (tp == NULL) { 695 fprintf(stderr, "line %d: syntax error\n", lineno); 696 errors++; 697 continue; 698 } 699 *tp++ = '\0', tp = skip(tp); 700 if (!strcmp(cp, "type")) { 701 if (tp == NULL) 702 tp = unknown; 703 cpp = dktypenames; 704 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 705 if (*cpp && !strcmp(*cpp, tp)) { 706 lp->d_type = cpp - dktypenames; 707 break; 708 } 709 if (cpp < &dktypenames[DKMAXTYPES]) 710 continue; 711 v = strtoul(tp, NULL, 10); 712 if (v >= DKMAXTYPES) 713 fprintf(stderr, "line %d:%s %lu\n", lineno, 714 "Warning, unknown disk type", v); 715 lp->d_type = v; 716 continue; 717 } 718 if (!strcmp(cp, "flags")) { 719 for (v = 0; (cp = tp) && *cp != '\0';) { 720 tp = word(cp); 721 if (!strcmp(cp, "removeable")) 722 v |= D_REMOVABLE; 723 else if (!strcmp(cp, "ecc")) 724 v |= D_ECC; 725 else if (!strcmp(cp, "badsect")) 726 v |= D_BADSECT; 727 else { 728 fprintf(stderr, 729 "line %d: %s: bad flag\n", 730 lineno, cp); 731 errors++; 732 } 733 } 734 lp->d_flags = v; 735 continue; 736 } 737 if (!strcmp(cp, "drivedata")) { 738 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 739 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 740 tp = word(cp); 741 } 742 continue; 743 } 744 if (sscanf(cp, "%lu partitions", &v) == 1) { 745 if (v == 0 || v > MAXPARTITIONS) { 746 fprintf(stderr, 747 "line %d: bad # of partitions\n", lineno); 748 lp->d_npartitions = MAXPARTITIONS; 749 errors++; 750 } else 751 lp->d_npartitions = v; 752 continue; 753 } 754 if (tp == NULL) 755 tp = blank; 756 if (!strcmp(cp, "disk")) { 757 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 758 continue; 759 } 760 if (!strcmp(cp, "label")) { 761 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 762 continue; 763 } 764 if (!strcmp(cp, "bytes/sector")) { 765 v = strtoul(tp, NULL, 10); 766 if (v == 0 || (v % DEV_BSIZE) != 0) { 767 fprintf(stderr, 768 "line %d: %s: bad sector size\n", 769 lineno, tp); 770 errors++; 771 } else 772 lp->d_secsize = v; 773 continue; 774 } 775 if (!strcmp(cp, "sectors/track")) { 776 v = strtoul(tp, NULL, 10); 777 #if (ULONG_MAX != 0xffffffffUL) 778 if (v == 0 || v > 0xffffffff) { 779 #else 780 if (v == 0) { 781 #endif 782 fprintf(stderr, "line %d: %s: bad %s\n", 783 lineno, tp, cp); 784 errors++; 785 } else 786 lp->d_nsectors = v; 787 continue; 788 } 789 if (!strcmp(cp, "sectors/cylinder")) { 790 v = strtoul(tp, NULL, 10); 791 if (v == 0) { 792 fprintf(stderr, "line %d: %s: bad %s\n", 793 lineno, tp, cp); 794 errors++; 795 } else 796 lp->d_secpercyl = v; 797 continue; 798 } 799 if (!strcmp(cp, "tracks/cylinder")) { 800 v = strtoul(tp, NULL, 10); 801 if (v == 0) { 802 fprintf(stderr, "line %d: %s: bad %s\n", 803 lineno, tp, cp); 804 errors++; 805 } else 806 lp->d_ntracks = v; 807 continue; 808 } 809 if (!strcmp(cp, "cylinders")) { 810 v = strtoul(tp, NULL, 10); 811 if (v == 0) { 812 fprintf(stderr, "line %d: %s: bad %s\n", 813 lineno, tp, cp); 814 errors++; 815 } else 816 lp->d_ncylinders = v; 817 continue; 818 } 819 if (!strcmp(cp, "sectors/unit")) { 820 v = strtoul(tp, NULL, 10); 821 if (v == 0) { 822 fprintf(stderr, "line %d: %s: bad %s\n", 823 lineno, tp, cp); 824 errors++; 825 } else 826 lp->d_secperunit = v; 827 continue; 828 } 829 if (!strcmp(cp, "rpm")) { 830 v = strtoul(tp, NULL, 10); 831 if (v == 0 || v > USHRT_MAX) { 832 fprintf(stderr, "line %d: %s: bad %s\n", 833 lineno, tp, cp); 834 errors++; 835 } else 836 lp->d_rpm = v; 837 continue; 838 } 839 if (!strcmp(cp, "interleave")) { 840 v = strtoul(tp, NULL, 10); 841 if (v == 0 || v > USHRT_MAX) { 842 fprintf(stderr, "line %d: %s: bad %s\n", 843 lineno, tp, cp); 844 errors++; 845 } else 846 lp->d_interleave = v; 847 continue; 848 } 849 if (!strcmp(cp, "trackskew")) { 850 v = strtoul(tp, NULL, 10); 851 if (v > USHRT_MAX) { 852 fprintf(stderr, "line %d: %s: bad %s\n", 853 lineno, tp, cp); 854 errors++; 855 } else 856 lp->d_trackskew = v; 857 continue; 858 } 859 if (!strcmp(cp, "cylinderskew")) { 860 v = strtoul(tp, NULL, 10); 861 if (v > USHRT_MAX) { 862 fprintf(stderr, "line %d: %s: bad %s\n", 863 lineno, tp, cp); 864 errors++; 865 } else 866 lp->d_cylskew = v; 867 continue; 868 } 869 if (!strcmp(cp, "headswitch")) { 870 v = strtoul(tp, NULL, 10); 871 lp->d_headswitch = v; 872 continue; 873 } 874 if (!strcmp(cp, "track-to-track seek")) { 875 v = strtoul(tp, NULL, 10); 876 lp->d_trkseek = v; 877 continue; 878 } 879 /* the ':' was removed above */ 880 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 881 fprintf(stderr, 882 "line %d: %s: Unknown disklabel field\n", lineno, 883 cp); 884 errors++; 885 continue; 886 } 887 888 /* Process a partition specification line. */ 889 part = *cp - 'a'; 890 if (part >= lp->d_npartitions) { 891 fprintf(stderr, 892 "line %d: partition name out of range a-%c: %s\n", 893 lineno, 'a' + lp->d_npartitions - 1, cp); 894 errors++; 895 continue; 896 } 897 part_set[part] = 1; 898 899 if (getasciipartspec(tp, lp, part, lineno) != 0) { 900 errors++; 901 break; 902 } 903 } 904 errors += checklabel(lp); 905 return (errors == 0); 906 } 907 908 #define NXTNUM(n) do { \ 909 if (tp == NULL) { \ 910 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 911 return (1); \ 912 } else { \ 913 cp = tp, tp = word(cp); \ 914 (n) = strtoul(cp, NULL, 10); \ 915 } \ 916 } while (0) 917 918 /* retain 1 character following number */ 919 #define NXTWORD(w,n) do { \ 920 if (tp == NULL) { \ 921 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 922 return (1); \ 923 } else { \ 924 char *tmp; \ 925 cp = tp, tp = word(cp); \ 926 (n) = strtoul(cp, &tmp, 10); \ 927 if (tmp) (w) = *tmp; \ 928 } \ 929 } while (0) 930 931 /* 932 * Read a partition line into partition `part' in the specified disklabel. 933 * Return 0 on success, 1 on failure. 934 */ 935 static int 936 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 937 { 938 struct partition *pp; 939 char *cp; 940 const char **cpp; 941 u_long v; 942 943 pp = &lp->d_partitions[part]; 944 cp = NULL; 945 946 v = 0; 947 NXTWORD(part_size_type[part],v); 948 if (v == 0 && part_size_type[part] != '*') { 949 fprintf(stderr, 950 "line %d: %s: bad partition size\n", lineno, cp); 951 return (1); 952 } 953 pp->p_size = v; 954 955 v = 0; 956 NXTWORD(part_offset_type[part],v); 957 if (v == 0 && part_offset_type[part] != '*' && 958 part_offset_type[part] != '\0') { 959 fprintf(stderr, 960 "line %d: %s: bad partition offset\n", lineno, cp); 961 return (1); 962 } 963 pp->p_offset = v; 964 if (tp == NULL) { 965 fprintf(stderr, "line %d: missing file system type\n", lineno); 966 return (1); 967 } 968 cp = tp, tp = word(cp); 969 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 970 if (*cpp && !strcmp(*cpp, cp)) 971 break; 972 if (*cpp != NULL) { 973 pp->p_fstype = cpp - fstypenames; 974 } else { 975 if (isdigit(*cp)) 976 v = strtoul(cp, NULL, 10); 977 else 978 v = FSMAXTYPES; 979 if (v >= FSMAXTYPES) { 980 fprintf(stderr, 981 "line %d: Warning, unknown file system type %s\n", 982 lineno, cp); 983 v = FS_UNUSED; 984 } 985 pp->p_fstype = v; 986 } 987 988 switch (pp->p_fstype) { 989 case FS_UNUSED: 990 /* 991 * allow us to accept defaults for 992 * fsize/frag/cpg 993 */ 994 if (tp) { 995 NXTNUM(pp->p_fsize); 996 if (pp->p_fsize == 0) 997 break; 998 NXTNUM(v); 999 pp->p_frag = v / pp->p_fsize; 1000 } 1001 /* else default to 0's */ 1002 break; 1003 1004 /* These happen to be the same */ 1005 case FS_BSDFFS: 1006 case FS_BSDLFS: 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 NXTNUM(pp->p_cpg); 1014 } else { 1015 /* 1016 * FIX! poor attempt at adaptive 1017 */ 1018 /* 1 GB */ 1019 if (pp->p_size < 1024*1024*1024 / lp->d_secsize) { 1020 /* 1021 * FIX! These are too low, but are traditional 1022 */ 1023 pp->p_fsize = DEFAULT_NEWFS_FRAG; 1024 pp->p_frag = DEFAULT_NEWFS_BLOCK / 1025 DEFAULT_NEWFS_FRAG; 1026 pp->p_cpg = DEFAULT_NEWFS_CPG; 1027 } else { 1028 pp->p_fsize = BIG_NEWFS_FRAG; 1029 pp->p_frag = BIG_NEWFS_BLOCK / 1030 BIG_NEWFS_FRAG; 1031 pp->p_cpg = BIG_NEWFS_CPG; 1032 } 1033 } 1034 default: 1035 break; 1036 } 1037 return (0); 1038 } 1039 1040 /* 1041 * Check disklabel for errors and fill in 1042 * derived fields according to supplied values. 1043 */ 1044 static int 1045 checklabel(struct disklabel *lp) 1046 { 1047 struct partition *pp; 1048 int i, errors = 0; 1049 char part; 1050 u_long total_size, total_percent, current_offset; 1051 int seen_default_offset; 1052 int hog_part; 1053 int j; 1054 struct partition *pp2; 1055 1056 if (lp == NULL) 1057 lp = &lab; 1058 1059 if (allfields) { 1060 1061 if (lp->d_secsize == 0) { 1062 fprintf(stderr, "sector size 0\n"); 1063 return (1); 1064 } 1065 if (lp->d_nsectors == 0) { 1066 fprintf(stderr, "sectors/track 0\n"); 1067 return (1); 1068 } 1069 if (lp->d_ntracks == 0) { 1070 fprintf(stderr, "tracks/cylinder 0\n"); 1071 return (1); 1072 } 1073 if (lp->d_ncylinders == 0) { 1074 fprintf(stderr, "cylinders/unit 0\n"); 1075 errors++; 1076 } 1077 if (lp->d_rpm == 0) 1078 warnx("revolutions/minute 0"); 1079 if (lp->d_secpercyl == 0) 1080 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1081 if (lp->d_secperunit == 0) 1082 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1083 if (lp->d_bbsize == 0) { 1084 fprintf(stderr, "boot block size 0\n"); 1085 errors++; 1086 } else if (lp->d_bbsize % lp->d_secsize) 1087 warnx("boot block size %% sector-size != 0"); 1088 if (lp->d_npartitions > MAXPARTITIONS) 1089 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1090 (u_long)lp->d_npartitions, MAXPARTITIONS); 1091 } else { 1092 struct disklabel *vl; 1093 1094 vl = getvirginlabel(); 1095 lp->d_secsize = vl->d_secsize; 1096 lp->d_nsectors = vl->d_nsectors; 1097 lp->d_ntracks = vl->d_ntracks; 1098 lp->d_ncylinders = vl->d_ncylinders; 1099 lp->d_rpm = vl->d_rpm; 1100 lp->d_interleave = vl->d_interleave; 1101 lp->d_secpercyl = vl->d_secpercyl; 1102 lp->d_secperunit = vl->d_secperunit; 1103 lp->d_bbsize = vl->d_bbsize; 1104 lp->d_npartitions = vl->d_npartitions; 1105 } 1106 1107 1108 /* first allocate space to the partitions, then offsets */ 1109 total_size = 0; /* in sectors */ 1110 total_percent = 0; /* in percent */ 1111 hog_part = -1; 1112 /* find all fixed partitions */ 1113 for (i = 0; i < lp->d_npartitions; i++) { 1114 pp = &lp->d_partitions[i]; 1115 if (part_set[i]) { 1116 if (part_size_type[i] == '*') { 1117 if (i == RAW_PART) { 1118 pp->p_size = lp->d_secperunit; 1119 } else { 1120 if (hog_part != -1) 1121 warnx("Too many '*' partitions (%c and %c)", 1122 hog_part + 'a',i + 'a'); 1123 else 1124 hog_part = i; 1125 } 1126 } else { 1127 off_t size; 1128 1129 size = pp->p_size; 1130 switch (part_size_type[i]) { 1131 case '%': 1132 total_percent += size; 1133 break; 1134 case 'k': 1135 case 'K': 1136 size *= 1024ULL; 1137 break; 1138 case 'm': 1139 case 'M': 1140 size *= 1024ULL * 1024ULL; 1141 break; 1142 case 'g': 1143 case 'G': 1144 size *= 1024ULL * 1024ULL * 1024ULL; 1145 break; 1146 case '\0': 1147 break; 1148 default: 1149 warnx("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1150 break; 1151 } 1152 /* don't count %'s yet */ 1153 if (part_size_type[i] != '%') { 1154 /* 1155 * for all not in sectors, convert to 1156 * sectors 1157 */ 1158 if (part_size_type[i] != '\0') { 1159 if (size % lp->d_secsize != 0) 1160 warnx("partition %c not an integer number of sectors", 1161 i + 'a'); 1162 size /= lp->d_secsize; 1163 pp->p_size = size; 1164 } 1165 /* else already in sectors */ 1166 if (i != RAW_PART) 1167 total_size += size; 1168 } 1169 } 1170 } 1171 } 1172 /* handle % partitions - note %'s don't need to add up to 100! */ 1173 if (total_percent != 0) { 1174 long free_space = lp->d_secperunit - total_size; 1175 if (total_percent > 100) { 1176 fprintf(stderr,"total percentage %lu is greater than 100\n", 1177 total_percent); 1178 errors++; 1179 } 1180 1181 if (free_space > 0) { 1182 for (i = 0; i < lp->d_npartitions; i++) { 1183 pp = &lp->d_partitions[i]; 1184 if (part_set[i] && part_size_type[i] == '%') { 1185 /* careful of overflows! and integer roundoff */ 1186 pp->p_size = ((double)pp->p_size/100) * free_space; 1187 total_size += pp->p_size; 1188 1189 /* FIX we can lose a sector or so due to roundoff per 1190 partition. A more complex algorithm could avoid that */ 1191 } 1192 } 1193 } else { 1194 fprintf(stderr, 1195 "%ld sectors available to give to '*' and '%%' partitions\n", 1196 free_space); 1197 errors++; 1198 /* fix? set all % partitions to size 0? */ 1199 } 1200 } 1201 /* give anything remaining to the hog partition */ 1202 if (hog_part != -1) { 1203 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; 1204 total_size = lp->d_secperunit; 1205 } 1206 1207 /* Now set the offsets for each partition */ 1208 current_offset = 0; /* in sectors */ 1209 seen_default_offset = 0; 1210 for (i = 0; i < lp->d_npartitions; i++) { 1211 part = 'a' + i; 1212 pp = &lp->d_partitions[i]; 1213 if (part_set[i]) { 1214 if (part_offset_type[i] == '*') { 1215 if (i == RAW_PART) { 1216 pp->p_offset = 0; 1217 } else { 1218 pp->p_offset = current_offset; 1219 seen_default_offset = 1; 1220 } 1221 } else { 1222 /* allow them to be out of order for old-style tables */ 1223 if (pp->p_offset < current_offset && 1224 seen_default_offset && i != RAW_PART && 1225 pp->p_fstype != FS_VINUM) { 1226 fprintf(stderr, 1227 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1228 (long)pp->p_offset,i+'a',current_offset); 1229 fprintf(stderr, 1230 "Labels with any *'s for offset must be in ascending order by sector\n"); 1231 errors++; 1232 } else if (pp->p_offset != current_offset && 1233 i != RAW_PART && seen_default_offset) { 1234 /* 1235 * this may give unneeded warnings if 1236 * partitions are out-of-order 1237 */ 1238 warnx( 1239 "Offset %ld for partition %c doesn't match expected value %ld", 1240 (long)pp->p_offset, i + 'a', current_offset); 1241 } 1242 } 1243 if (i != RAW_PART) 1244 current_offset = pp->p_offset + pp->p_size; 1245 } 1246 } 1247 1248 for (i = 0; i < lp->d_npartitions; i++) { 1249 part = 'a' + i; 1250 pp = &lp->d_partitions[i]; 1251 if (pp->p_size == 0 && pp->p_offset != 0) 1252 warnx("partition %c: size 0, but offset %lu", 1253 part, (u_long)pp->p_offset); 1254 #ifdef notdef 1255 if (pp->p_size % lp->d_secpercyl) 1256 warnx("partition %c: size %% cylinder-size != 0", 1257 part); 1258 if (pp->p_offset % lp->d_secpercyl) 1259 warnx("partition %c: offset %% cylinder-size != 0", 1260 part); 1261 #endif 1262 if (pp->p_offset > lp->d_secperunit) { 1263 fprintf(stderr, 1264 "partition %c: offset past end of unit\n", part); 1265 errors++; 1266 } 1267 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1268 fprintf(stderr, 1269 "partition %c: partition extends past end of unit\n", 1270 part); 1271 errors++; 1272 } 1273 if (i == RAW_PART) { 1274 if (pp->p_fstype != FS_UNUSED) 1275 warnx("partition %c is not marked as unused!",part); 1276 if (pp->p_offset != 0) 1277 warnx("partition %c doesn't start at 0!",part); 1278 if (pp->p_size != lp->d_secperunit) 1279 warnx("partition %c doesn't cover the whole unit!",part); 1280 1281 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1282 (pp->p_size != lp->d_secperunit)) { 1283 warnx("An incorrect partition %c may cause problems for " 1284 "standard system utilities",part); 1285 } 1286 } 1287 1288 /* check for overlaps */ 1289 /* this will check for all possible overlaps once and only once */ 1290 for (j = 0; j < i; j++) { 1291 pp2 = &lp->d_partitions[j]; 1292 if (j != RAW_PART && i != RAW_PART && 1293 pp->p_fstype != FS_VINUM && 1294 pp2->p_fstype != FS_VINUM && 1295 part_set[i] && part_set[j]) { 1296 if (pp2->p_offset < pp->p_offset + pp->p_size && 1297 (pp2->p_offset + pp2->p_size > pp->p_offset || 1298 pp2->p_offset >= pp->p_offset)) { 1299 fprintf(stderr,"partitions %c and %c overlap!\n", 1300 j + 'a', i + 'a'); 1301 errors++; 1302 } 1303 } 1304 } 1305 } 1306 for (; i < MAXPARTITIONS; i++) { 1307 part = 'a' + i; 1308 pp = &lp->d_partitions[i]; 1309 if (pp->p_size || pp->p_offset) 1310 warnx("unused partition %c: size %d offset %lu", 1311 'a' + i, pp->p_size, (u_long)pp->p_offset); 1312 } 1313 return (errors); 1314 } 1315 1316 /* 1317 * When operating on a "virgin" disk, try getting an initial label 1318 * from the associated device driver. This might work for all device 1319 * drivers that are able to fetch some initial device parameters 1320 * without even having access to a (BSD) disklabel, like SCSI disks, 1321 * most IDE drives, or vn devices. 1322 * 1323 * The device name must be given in its "canonical" form. 1324 */ 1325 static struct disklabel * 1326 getvirginlabel(void) 1327 { 1328 static struct disklabel loclab; 1329 struct partition *dp; 1330 int f; 1331 u_int u; 1332 1333 if ((f = open(specname, O_RDONLY)) == -1) { 1334 warn("cannot open %s", specname); 1335 return (NULL); 1336 } 1337 1338 /* New world order */ 1339 if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || 1340 (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { 1341 close (f); 1342 return (NULL); 1343 } 1344 memset(&loclab, 0, sizeof loclab); 1345 loclab.d_magic = DISKMAGIC; 1346 loclab.d_magic2 = DISKMAGIC; 1347 loclab.d_secsize = secsize; 1348 loclab.d_secperunit = mediasize / secsize; 1349 1350 /* 1351 * Nobody in these enligthened days uses the CHS geometry for 1352 * anything, but nontheless try to get it right. If we fail 1353 * to get any good ideas from the device, construct something 1354 * which is IBM-PC friendly. 1355 */ 1356 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1357 loclab.d_nsectors = u; 1358 else 1359 loclab.d_nsectors = 63; 1360 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1361 loclab.d_ntracks = u; 1362 else if (loclab.d_secperunit <= 63*1*1024) 1363 loclab.d_ntracks = 1; 1364 else if (loclab.d_secperunit <= 63*16*1024) 1365 loclab.d_ntracks = 16; 1366 else 1367 loclab.d_ntracks = 255; 1368 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1369 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1370 loclab.d_npartitions = MAXPARTITIONS; 1371 1372 /* Various (unneeded) compat stuff */ 1373 loclab.d_rpm = 3600; 1374 loclab.d_bbsize = BBSIZE; 1375 loclab.d_interleave = 1; 1376 strncpy(loclab.d_typename, "amnesiac", 1377 sizeof(loclab.d_typename)); 1378 1379 dp = &loclab.d_partitions[RAW_PART]; 1380 dp->p_size = loclab.d_secperunit; 1381 loclab.d_checksum = dkcksum(&loclab); 1382 close (f); 1383 return (&loclab); 1384 } 1385 1386 static void 1387 usage(void) 1388 { 1389 1390 fprintf(stderr, 1391 "%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", 1392 "usage: bsdlabel disk", 1393 "\t\t(to read label)", 1394 " bsdlabel -w [-n] [-m machine] disk [type]", 1395 "\t\t(to write label with existing boot program)", 1396 " bsdlabel -e [-n] [-m machine] disk", 1397 "\t\t(to edit label)", 1398 " bsdlabel -R [-n] [-m machine] disk protofile", 1399 "\t\t(to restore label with existing boot program)", 1400 " bsdlabel -B [-b boot] [-m machine] disk", 1401 "\t\t(to install boot program with existing on-disk label)", 1402 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1403 "\t\t(to write label and install boot program)", 1404 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1405 "\t\t(to restore label and install boot program)" 1406 ); 1407 exit(1); 1408 } 1409