bsdlabel.c revision 115624
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 45static 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 51static 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: head/sbin/bsdlabel/bsdlabel.c 115624 2003-06-01 13:47:51Z phk $"); 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 90static void makelabel(const char *, struct disklabel *); 91static int writelabel(void); 92static int readlabel(int flag); 93static void display(FILE *, const struct disklabel *); 94static int edit(void); 95static int editit(void); 96static char *skip(char *); 97static char *word(char *); 98static int getasciilabel(FILE *, struct disklabel *); 99static int getasciipartspec(char *, struct disklabel *, int, int); 100static int checklabel(struct disklabel *); 101static void usage(void); 102static struct disklabel *getvirginlabel(void); 103 104#define DEFEDITOR _PATH_VI 105 106static char *dkname; 107static char *specname; 108static char tmpfil[] = PATH_TMPFILE; 109 110static struct disklabel lab; 111static u_char bootarea[BBSIZE]; 112static off_t mediasize; 113static u_int secsize; 114static char blank[] = ""; 115static char unknown[] = "unknown"; 116 117#define MAX_PART ('z') 118#define MAX_NUM_PARTS (1 + MAX_PART - 'a') 119static char part_size_type[MAX_NUM_PARTS]; 120static char part_offset_type[MAX_NUM_PARTS]; 121static int part_set[MAX_NUM_PARTS]; 122 123static int installboot; /* non-zero if we should install a boot program */ 124static int allfields; /* present all fields in edit */ 125static char const *xxboot; /* primary boot */ 126 127static off_t mbroffset; 128static int labeloffset = LABELOFFSET + LABELSECTOR * DEV_BSIZE; 129static int bbsize = BBSIZE; 130static int alphacksum = 131#if defined(__alpha__) 132 1; 133#else 134 0; 135#endif 136 137enum { 138 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 139} op = UNSPEC; 140 141 142static int disable_write; /* set to disable writing to disk label */ 143 144int 145main(int argc, char *argv[]) 146{ 147 FILE *t; 148 int ch, error = 0; 149 char const *name = 0; 150 151 while ((ch = getopt(argc, argv, "ABb:em:nRrs:w")) != -1) 152 switch (ch) { 153 case 'A': 154 allfields = 1; 155 break; 156 case 'B': 157 ++installboot; 158 break; 159 case 'b': 160 xxboot = optarg; 161 break; 162 case 'm': 163 if (!strcmp(optarg, "i386")) { 164 labeloffset = 512; 165 bbsize = 8192; 166 alphacksum = 0; 167 } else if (!strcmp(optarg, "pc98")) { 168 labeloffset = 512; 169 bbsize = 8192; 170 alphacksum = 0; 171 } else if (!strcmp(optarg, "alpha")) { 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(); 212 213 /* Figure out the names of the thing we're working on */ 214 if (argv[0][0] != '/') { 215 dkname = argv[0]; 216 asprintf(&specname, "%s%s", _PATH_DEV, argv[0]); 217 } else { 218 dkname = strrchr(argv[0], '/'); 219 dkname++; 220 specname = argv[0]; 221 } 222 223 if (installboot && op == UNSPEC) 224 op = WRITEBOOT; 225 else if (op == UNSPEC) 226 op = READ; 227 228 switch(op) { 229 230 case UNSPEC: 231 break; 232 233 case EDIT: 234 if (argc != 1) 235 usage(); 236 readlabel(1); 237 error = edit(); 238 break; 239 240 case READ: 241 if (argc != 1) 242 usage(); 243 readlabel(1); 244 display(stdout, NULL); 245 error = checklabel(NULL); 246 break; 247 248 case RESTORE: 249 if (argc != 2) 250 usage(); 251 if (!(t = fopen(argv[1], "r"))) 252 err(4, "fopen %s", argv[1]); 253 readlabel(0); 254 if (!getasciilabel(t, &lab)) 255 exit(1); 256 error = writelabel(); 257 break; 258 259 case WRITE: 260 if (argc == 2) 261 name = argv[1]; 262 else if (argc == 1) 263 name = "auto"; 264 else 265 usage(); 266 readlabel(0); 267 makelabel(name, &lab); 268 if (checklabel(NULL) == 0) 269 error = writelabel(); 270 break; 271 272 case WRITEBOOT: 273 274 readlabel(1); 275 if (argc == 2) 276 makelabel(argv[1], &lab); 277 if (checklabel(NULL) == 0) 278 error = writelabel(); 279 break; 280 } 281 exit(error); 282} 283 284/* 285 * Construct a prototype disklabel from /etc/disktab. 286 */ 287static void 288makelabel(const char *type, struct disklabel *lp) 289{ 290 struct disklabel *dp; 291 292 if (strcmp(type, "auto") == 0) 293 dp = getvirginlabel(); 294 else 295 dp = getdiskbyname(type); 296 if (dp == NULL) 297 errx(1, "%s: unknown disk type", type); 298 *lp = *dp; 299 bzero(lp->d_packname, sizeof(lp->d_packname)); 300} 301 302static void 303readboot(void) 304{ 305 int fd, i; 306 struct stat st; 307 308 if (xxboot == NULL) 309 xxboot = "/boot/boot"; 310 fd = open(xxboot, O_RDONLY); 311 if (fd < 0) 312 err(1, "cannot open %s", xxboot); 313 fstat(fd, &st); 314 if (alphacksum && st.st_size <= BBSIZE - 512) { 315 i = read(fd, bootarea + 512, st.st_size); 316 if (i != st.st_size) 317 err(1, "read error %s", xxboot); 318 return; 319 } else if ((!alphacksum) && st.st_size <= BBSIZE) { 320 i = read(fd, bootarea, st.st_size); 321 if (i != st.st_size) 322 err(1, "read error %s", xxboot); 323 return; 324 } 325 errx(1, "boot code %s is wrong size", xxboot); 326} 327 328static int 329writelabel(void) 330{ 331 uint64_t *p, sum; 332 int i, fd; 333 struct gctl_req *grq; 334 char const *errstr; 335 struct disklabel *lp = &lab; 336 337 if (disable_write) { 338 warnx("write to disk label supressed - label was as follows:"); 339 display(stdout, NULL); 340 return (0); 341 } 342 343 lp->d_magic = DISKMAGIC; 344 lp->d_magic2 = DISKMAGIC; 345 lp->d_checksum = 0; 346 lp->d_checksum = dkcksum(lp); 347 if (installboot) 348 readboot(); 349 for (i = 0; i < lab.d_npartitions; i++) 350 if (lab.d_partitions[i].p_size) 351 lab.d_partitions[i].p_offset += mbroffset; 352 bsd_disklabel_le_enc(bootarea + labeloffset, lp); 353 if (alphacksum) { 354 /* Generate the bootblock checksum for the SRM console. */ 355 for (p = (uint64_t *)bootarea, i = 0, sum = 0; i < 63; i++) 356 sum += p[i]; 357 p[63] = sum; 358 } 359 360 fd = open(specname, O_RDWR); 361 if (fd < 0) { 362 grq = gctl_get_handle(); 363 gctl_ro_param(grq, "verb", -1, "write label"); 364 gctl_ro_param(grq, "class", -1, "BSD"); 365 gctl_ro_param(grq, "geom", -1, dkname); 366 gctl_ro_param(grq, "label", 148+16*8, bootarea + labeloffset); 367 errstr = gctl_issue(grq); 368 if (errstr != NULL) { 369 warnx("%s", errstr); 370 gctl_free(grq); 371 return(1); 372 } 373 gctl_free(grq); 374 if (installboot) { 375 grq = gctl_get_handle(); 376 gctl_ro_param(grq, "verb", -1, "write bootcode"); 377 gctl_ro_param(grq, "class", -1, "BSD"); 378 gctl_ro_param(grq, "geom", -1, dkname); 379 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea); 380 errstr = gctl_issue(grq); 381 if (errstr != NULL) { 382 warnx("%s", errstr); 383 gctl_free(grq); 384 return (1); 385 } 386 gctl_free(grq); 387 } 388 } else { 389 if (write(fd, bootarea, bbsize) != bbsize) { 390 warn("write %s", specname); 391 close (fd); 392 return (1); 393 } 394 close (fd); 395 } 396 return (0); 397} 398 399/* 400 * Fetch disklabel for disk. 401 * Use ioctl to get label unless -r flag is given. 402 */ 403static int 404readlabel(int flag) 405{ 406 int f, i; 407 int error; 408 struct gctl_req *grq; 409 char const *errstr; 410 411 f = open(specname, O_RDONLY); 412 if (f < 0) 413 err(1, specname); 414 (void)lseek(f, (off_t)0, SEEK_SET); 415 if (read(f, bootarea, BBSIZE) != BBSIZE) 416 err(4, "%s read", specname); 417 close (f); 418 error = bsd_disklabel_le_dec(bootarea + labeloffset, &lab, MAXPARTITIONS); 419 if (flag && error) 420 errx(1, "%s: no valid label found", specname); 421 422 grq = gctl_get_handle(); 423 gctl_ro_param(grq, "verb", -1, "read mbroffset"); 424 gctl_ro_param(grq, "class", -1, "BSD"); 425 gctl_ro_param(grq, "geom", -1, dkname); 426 gctl_rw_param(grq, "mbroffset", sizeof(mbroffset), &mbroffset); 427 errstr = gctl_issue(grq); 428 if (errstr != NULL) { 429 mbroffset = 0; 430 gctl_free(grq); 431 return (error); 432 } 433 mbroffset /= lab.d_secsize; 434 if (lab.d_partitions[RAW_PART].p_offset == mbroffset) 435 for (i = 0; i < lab.d_npartitions; i++) 436 if (lab.d_partitions[i].p_size) 437 lab.d_partitions[i].p_offset -= mbroffset; 438 return (error); 439} 440 441 442static void 443display(FILE *f, const struct disklabel *lp) 444{ 445 int i, j; 446 const struct partition *pp; 447 448 if (lp == NULL) 449 lp = &lab; 450 451 fprintf(f, "# %s:\n", specname); 452 if (allfields) { 453 if (lp->d_type < DKMAXTYPES) 454 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 455 else 456 fprintf(f, "type: %u\n", lp->d_type); 457 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 458 lp->d_typename); 459 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 460 lp->d_packname); 461 fprintf(f, "flags:"); 462 if (lp->d_flags & D_REMOVABLE) 463 fprintf(f, " removeable"); 464 if (lp->d_flags & D_ECC) 465 fprintf(f, " ecc"); 466 if (lp->d_flags & D_BADSECT) 467 fprintf(f, " badsect"); 468 fprintf(f, "\n"); 469 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 470 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 471 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 472 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 473 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 474 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 475 fprintf(f, "rpm: %u\n", lp->d_rpm); 476 fprintf(f, "interleave: %u\n", lp->d_interleave); 477 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 478 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 479 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 480 (u_long)lp->d_headswitch); 481 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 482 (u_long)lp->d_trkseek); 483 fprintf(f, "drivedata: "); 484 for (i = NDDATA - 1; i >= 0; i--) 485 if (lp->d_drivedata[i]) 486 break; 487 if (i < 0) 488 i = 0; 489 for (j = 0; j <= i; j++) 490 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 491 fprintf(f, "\n\n"); 492 } 493 fprintf(f, "%u partitions:\n", lp->d_npartitions); 494 fprintf(f, 495 "# size offset fstype [fsize bsize bps/cpg]\n"); 496 pp = lp->d_partitions; 497 for (i = 0; i < lp->d_npartitions; i++, pp++) { 498 if (pp->p_size) { 499 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 500 (u_long)pp->p_size, (u_long)pp->p_offset); 501 if (pp->p_fstype < FSMAXTYPES) 502 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 503 else 504 fprintf(f, "%8d", pp->p_fstype); 505 switch (pp->p_fstype) { 506 507 case FS_UNUSED: /* XXX */ 508 fprintf(f, " %5lu %5lu %5.5s ", 509 (u_long)pp->p_fsize, 510 (u_long)(pp->p_fsize * pp->p_frag), ""); 511 break; 512 513 case FS_BSDFFS: 514 fprintf(f, " %5lu %5lu %5u ", 515 (u_long)pp->p_fsize, 516 (u_long)(pp->p_fsize * pp->p_frag), 517 pp->p_cpg); 518 break; 519 520 case FS_BSDLFS: 521 fprintf(f, " %5lu %5lu %5d", 522 (u_long)pp->p_fsize, 523 (u_long)(pp->p_fsize * pp->p_frag), 524 pp->p_cpg); 525 break; 526 527 default: 528 fprintf(f, "%20.20s", ""); 529 break; 530 } 531 if (i == RAW_PART) { 532 fprintf(f, " # \"raw\" part, don't edit"); 533 } 534 fprintf(f, "\n"); 535 } 536 } 537 fflush(f); 538} 539 540static int 541edit(void) 542{ 543 int c, fd; 544 struct disklabel label; 545 FILE *fp; 546 547 if ((fd = mkstemp(tmpfil)) == -1 || 548 (fp = fdopen(fd, "w")) == NULL) { 549 warnx("can't create %s", tmpfil); 550 return (1); 551 } 552 display(fp, NULL); 553 fclose(fp); 554 for (;;) { 555 if (!editit()) 556 break; 557 fp = fopen(tmpfil, "r"); 558 if (fp == NULL) { 559 warnx("can't reopen %s for reading", tmpfil); 560 break; 561 } 562 bzero((char *)&label, sizeof(label)); 563 c = getasciilabel(fp, &label); 564 fclose(fp); 565 if (c) { 566 lab = label; 567 if (writelabel() == 0) { 568 (void) unlink(tmpfil); 569 return (0); 570 } 571 } 572 printf("re-edit the label? [y]: "); 573 fflush(stdout); 574 c = getchar(); 575 if (c != EOF && c != (int)'\n') 576 while (getchar() != (int)'\n') 577 ; 578 if (c == (int)'n') 579 break; 580 } 581 (void) unlink(tmpfil); 582 return (1); 583} 584 585static int 586editit(void) 587{ 588 int pid, xpid; 589 int locstat, omask; 590 const char *ed; 591 592 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 593 while ((pid = fork()) < 0) { 594 if (errno == EPROCLIM) { 595 warnx("you have too many processes"); 596 return(0); 597 } 598 if (errno != EAGAIN) { 599 warn("fork"); 600 return(0); 601 } 602 sleep(1); 603 } 604 if (pid == 0) { 605 sigsetmask(omask); 606 setgid(getgid()); 607 setuid(getuid()); 608 if ((ed = getenv("EDITOR")) == (char *)0) 609 ed = DEFEDITOR; 610 execlp(ed, ed, tmpfil, (char *)0); 611 err(1, "%s", ed); 612 } 613 while ((xpid = wait(&locstat)) >= 0) 614 if (xpid == pid) 615 break; 616 sigsetmask(omask); 617 return(!locstat); 618} 619 620static char * 621skip(char *cp) 622{ 623 624 while (*cp != '\0' && isspace(*cp)) 625 cp++; 626 if (*cp == '\0' || *cp == '#') 627 return (NULL); 628 return (cp); 629} 630 631static char * 632word(char *cp) 633{ 634 char c; 635 636 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 637 cp++; 638 if ((c = *cp) != '\0') { 639 *cp++ = '\0'; 640 if (c != '#') 641 return (skip(cp)); 642 } 643 return (NULL); 644} 645 646/* 647 * Read an ascii label in from fd f, 648 * in the same format as that put out by display(), 649 * and fill in lp. 650 */ 651static int 652getasciilabel(FILE *f, struct disklabel *lp) 653{ 654 char *cp; 655 const char **cpp; 656 u_int part; 657 char *tp, line[BUFSIZ]; 658 u_long v; 659 int lineno = 0, errors = 0; 660 int i; 661 662 makelabel("auto", lp); 663 bzero(&part_set, sizeof(part_set)); 664 bzero(&part_size_type, sizeof(part_size_type)); 665 bzero(&part_offset_type, sizeof(part_offset_type)); 666 lp->d_bbsize = BBSIZE; /* XXX */ 667 lp->d_sbsize = 0; /* XXX */ 668 while (fgets(line, sizeof(line) - 1, f)) { 669 lineno++; 670 if ((cp = index(line,'\n')) != 0) 671 *cp = '\0'; 672 cp = skip(line); 673 if (cp == NULL) 674 continue; 675 tp = index(cp, ':'); 676 if (tp == NULL) { 677 fprintf(stderr, "line %d: syntax error\n", lineno); 678 errors++; 679 continue; 680 } 681 *tp++ = '\0', tp = skip(tp); 682 if (!strcmp(cp, "type")) { 683 if (tp == NULL) 684 tp = unknown; 685 cpp = dktypenames; 686 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 687 if (*cpp && !strcmp(*cpp, tp)) { 688 lp->d_type = cpp - dktypenames; 689 break; 690 } 691 if (cpp < &dktypenames[DKMAXTYPES]) 692 continue; 693 v = strtoul(tp, NULL, 10); 694 if (v >= DKMAXTYPES) 695 fprintf(stderr, "line %d:%s %lu\n", lineno, 696 "Warning, unknown disk type", v); 697 lp->d_type = v; 698 continue; 699 } 700 if (!strcmp(cp, "flags")) { 701 for (v = 0; (cp = tp) && *cp != '\0';) { 702 tp = word(cp); 703 if (!strcmp(cp, "removeable")) 704 v |= D_REMOVABLE; 705 else if (!strcmp(cp, "ecc")) 706 v |= D_ECC; 707 else if (!strcmp(cp, "badsect")) 708 v |= D_BADSECT; 709 else { 710 fprintf(stderr, 711 "line %d: %s: bad flag\n", 712 lineno, cp); 713 errors++; 714 } 715 } 716 lp->d_flags = v; 717 continue; 718 } 719 if (!strcmp(cp, "drivedata")) { 720 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 721 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 722 tp = word(cp); 723 } 724 continue; 725 } 726 if (sscanf(cp, "%lu partitions", &v) == 1) { 727 if (v == 0 || v > MAXPARTITIONS) { 728 fprintf(stderr, 729 "line %d: bad # of partitions\n", lineno); 730 lp->d_npartitions = MAXPARTITIONS; 731 errors++; 732 } else 733 lp->d_npartitions = v; 734 continue; 735 } 736 if (tp == NULL) 737 tp = blank; 738 if (!strcmp(cp, "disk")) { 739 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 740 continue; 741 } 742 if (!strcmp(cp, "label")) { 743 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 744 continue; 745 } 746 if (!strcmp(cp, "bytes/sector")) { 747 v = strtoul(tp, NULL, 10); 748 if (v == 0 || (v % DEV_BSIZE) != 0) { 749 fprintf(stderr, 750 "line %d: %s: bad sector size\n", 751 lineno, tp); 752 errors++; 753 } else 754 lp->d_secsize = v; 755 continue; 756 } 757 if (!strcmp(cp, "sectors/track")) { 758 v = strtoul(tp, NULL, 10); 759#if (ULONG_MAX != 0xffffffffUL) 760 if (v == 0 || v > 0xffffffff) { 761#else 762 if (v == 0) { 763#endif 764 fprintf(stderr, "line %d: %s: bad %s\n", 765 lineno, tp, cp); 766 errors++; 767 } else 768 lp->d_nsectors = v; 769 continue; 770 } 771 if (!strcmp(cp, "sectors/cylinder")) { 772 v = strtoul(tp, NULL, 10); 773 if (v == 0) { 774 fprintf(stderr, "line %d: %s: bad %s\n", 775 lineno, tp, cp); 776 errors++; 777 } else 778 lp->d_secpercyl = v; 779 continue; 780 } 781 if (!strcmp(cp, "tracks/cylinder")) { 782 v = strtoul(tp, NULL, 10); 783 if (v == 0) { 784 fprintf(stderr, "line %d: %s: bad %s\n", 785 lineno, tp, cp); 786 errors++; 787 } else 788 lp->d_ntracks = v; 789 continue; 790 } 791 if (!strcmp(cp, "cylinders")) { 792 v = strtoul(tp, NULL, 10); 793 if (v == 0) { 794 fprintf(stderr, "line %d: %s: bad %s\n", 795 lineno, tp, cp); 796 errors++; 797 } else 798 lp->d_ncylinders = v; 799 continue; 800 } 801 if (!strcmp(cp, "sectors/unit")) { 802 v = strtoul(tp, NULL, 10); 803 if (v == 0) { 804 fprintf(stderr, "line %d: %s: bad %s\n", 805 lineno, tp, cp); 806 errors++; 807 } else 808 lp->d_secperunit = v; 809 continue; 810 } 811 if (!strcmp(cp, "rpm")) { 812 v = strtoul(tp, NULL, 10); 813 if (v == 0 || v > USHRT_MAX) { 814 fprintf(stderr, "line %d: %s: bad %s\n", 815 lineno, tp, cp); 816 errors++; 817 } else 818 lp->d_rpm = v; 819 continue; 820 } 821 if (!strcmp(cp, "interleave")) { 822 v = strtoul(tp, NULL, 10); 823 if (v == 0 || v > USHRT_MAX) { 824 fprintf(stderr, "line %d: %s: bad %s\n", 825 lineno, tp, cp); 826 errors++; 827 } else 828 lp->d_interleave = v; 829 continue; 830 } 831 if (!strcmp(cp, "trackskew")) { 832 v = strtoul(tp, NULL, 10); 833 if (v > USHRT_MAX) { 834 fprintf(stderr, "line %d: %s: bad %s\n", 835 lineno, tp, cp); 836 errors++; 837 } else 838 lp->d_trackskew = v; 839 continue; 840 } 841 if (!strcmp(cp, "cylinderskew")) { 842 v = strtoul(tp, NULL, 10); 843 if (v > USHRT_MAX) { 844 fprintf(stderr, "line %d: %s: bad %s\n", 845 lineno, tp, cp); 846 errors++; 847 } else 848 lp->d_cylskew = v; 849 continue; 850 } 851 if (!strcmp(cp, "headswitch")) { 852 v = strtoul(tp, NULL, 10); 853 lp->d_headswitch = v; 854 continue; 855 } 856 if (!strcmp(cp, "track-to-track seek")) { 857 v = strtoul(tp, NULL, 10); 858 lp->d_trkseek = v; 859 continue; 860 } 861 /* the ':' was removed above */ 862 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 863 fprintf(stderr, 864 "line %d: %s: Unknown disklabel field\n", lineno, 865 cp); 866 errors++; 867 continue; 868 } 869 870 /* Process a partition specification line. */ 871 part = *cp - 'a'; 872 if (part >= lp->d_npartitions) { 873 fprintf(stderr, 874 "line %d: partition name out of range a-%c: %s\n", 875 lineno, 'a' + lp->d_npartitions - 1, cp); 876 errors++; 877 continue; 878 } 879 part_set[part] = 1; 880 881 if (getasciipartspec(tp, lp, part, lineno) != 0) { 882 errors++; 883 break; 884 } 885 } 886 errors += checklabel(lp); 887 return (errors == 0); 888} 889 890#define NXTNUM(n) do { \ 891 if (tp == NULL) { \ 892 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 893 return (1); \ 894 } else { \ 895 cp = tp, tp = word(cp); \ 896 (n) = strtoul(cp, NULL, 10); \ 897 } \ 898} while (0) 899 900/* retain 1 character following number */ 901#define NXTWORD(w,n) do { \ 902 if (tp == NULL) { \ 903 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 904 return (1); \ 905 } else { \ 906 char *tmp; \ 907 cp = tp, tp = word(cp); \ 908 (n) = strtoul(cp, &tmp, 10); \ 909 if (tmp) (w) = *tmp; \ 910 } \ 911} while (0) 912 913/* 914 * Read a partition line into partition `part' in the specified disklabel. 915 * Return 0 on success, 1 on failure. 916 */ 917static int 918getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 919{ 920 struct partition *pp; 921 char *cp; 922 const char **cpp; 923 u_long v; 924 925 pp = &lp->d_partitions[part]; 926 cp = NULL; 927 928 v = 0; 929 NXTWORD(part_size_type[part],v); 930 if (v == 0 && part_size_type[part] != '*') { 931 fprintf(stderr, 932 "line %d: %s: bad partition size\n", lineno, cp); 933 return (1); 934 } 935 pp->p_size = v; 936 937 v = 0; 938 NXTWORD(part_offset_type[part],v); 939 if (v == 0 && part_offset_type[part] != '*' && 940 part_offset_type[part] != '\0') { 941 fprintf(stderr, 942 "line %d: %s: bad partition offset\n", lineno, cp); 943 return (1); 944 } 945 pp->p_offset = v; 946 if (tp == NULL) { 947 fprintf(stderr, "line %d: missing file system type\n", lineno); 948 return (1); 949 } 950 cp = tp, tp = word(cp); 951 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 952 if (*cpp && !strcmp(*cpp, cp)) 953 break; 954 if (*cpp != NULL) { 955 pp->p_fstype = cpp - fstypenames; 956 } else { 957 if (isdigit(*cp)) 958 v = strtoul(cp, NULL, 10); 959 else 960 v = FSMAXTYPES; 961 if (v >= FSMAXTYPES) { 962 fprintf(stderr, 963 "line %d: Warning, unknown file system type %s\n", 964 lineno, cp); 965 v = FS_UNUSED; 966 } 967 pp->p_fstype = v; 968 } 969 970 switch (pp->p_fstype) { 971 case FS_UNUSED: 972 /* 973 * allow us to accept defaults for 974 * fsize/frag/cpg 975 */ 976 if (tp) { 977 NXTNUM(pp->p_fsize); 978 if (pp->p_fsize == 0) 979 break; 980 NXTNUM(v); 981 pp->p_frag = v / pp->p_fsize; 982 } 983 /* else default to 0's */ 984 break; 985 986 /* These happen to be the same */ 987 case FS_BSDFFS: 988 case FS_BSDLFS: 989 if (tp) { 990 NXTNUM(pp->p_fsize); 991 if (pp->p_fsize == 0) 992 break; 993 NXTNUM(v); 994 pp->p_frag = v / pp->p_fsize; 995 NXTNUM(pp->p_cpg); 996 } else { 997 /* 998 * FIX! poor attempt at adaptive 999 */ 1000 /* 1 GB */ 1001 if (pp->p_size < 1024*1024*1024 / lp->d_secsize) { 1002 /* 1003 * FIX! These are too low, but are traditional 1004 */ 1005 pp->p_fsize = DEFAULT_NEWFS_FRAG; 1006 pp->p_frag = DEFAULT_NEWFS_BLOCK / 1007 DEFAULT_NEWFS_FRAG; 1008 pp->p_cpg = DEFAULT_NEWFS_CPG; 1009 } else { 1010 pp->p_fsize = BIG_NEWFS_FRAG; 1011 pp->p_frag = BIG_NEWFS_BLOCK / 1012 BIG_NEWFS_FRAG; 1013 pp->p_cpg = BIG_NEWFS_CPG; 1014 } 1015 } 1016 default: 1017 break; 1018 } 1019 return (0); 1020} 1021 1022/* 1023 * Check disklabel for errors and fill in 1024 * derived fields according to supplied values. 1025 */ 1026static int 1027checklabel(struct disklabel *lp) 1028{ 1029 struct partition *pp; 1030 int i, errors = 0; 1031 char part; 1032 u_long total_size, total_percent, current_offset; 1033 int seen_default_offset; 1034 int hog_part; 1035 int j; 1036 struct partition *pp2; 1037 1038 if (lp == NULL) 1039 lp = &lab; 1040 1041 if (allfields) { 1042 1043 if (lp->d_secsize == 0) { 1044 fprintf(stderr, "sector size 0\n"); 1045 return (1); 1046 } 1047 if (lp->d_nsectors == 0) { 1048 fprintf(stderr, "sectors/track 0\n"); 1049 return (1); 1050 } 1051 if (lp->d_ntracks == 0) { 1052 fprintf(stderr, "tracks/cylinder 0\n"); 1053 return (1); 1054 } 1055 if (lp->d_ncylinders == 0) { 1056 fprintf(stderr, "cylinders/unit 0\n"); 1057 errors++; 1058 } 1059 if (lp->d_rpm == 0) 1060 warnx("revolutions/minute 0"); 1061 if (lp->d_secpercyl == 0) 1062 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1063 if (lp->d_secperunit == 0) 1064 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1065 if (lp->d_bbsize == 0) { 1066 fprintf(stderr, "boot block size 0\n"); 1067 errors++; 1068 } else if (lp->d_bbsize % lp->d_secsize) 1069 warnx("boot block size %% sector-size != 0"); 1070 if (lp->d_npartitions > MAXPARTITIONS) 1071 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)", 1072 (u_long)lp->d_npartitions, MAXPARTITIONS); 1073 } else { 1074 struct disklabel *vl; 1075 1076 vl = getvirginlabel(); 1077 lp->d_secsize = vl->d_secsize; 1078 lp->d_nsectors = vl->d_nsectors; 1079 lp->d_ntracks = vl->d_ntracks; 1080 lp->d_ncylinders = vl->d_ncylinders; 1081 lp->d_rpm = vl->d_rpm; 1082 lp->d_interleave = vl->d_interleave; 1083 lp->d_secpercyl = vl->d_secpercyl; 1084 lp->d_secperunit = vl->d_secperunit; 1085 lp->d_bbsize = vl->d_bbsize; 1086 lp->d_npartitions = vl->d_npartitions; 1087 } 1088 1089 1090 /* first allocate space to the partitions, then offsets */ 1091 total_size = 0; /* in sectors */ 1092 total_percent = 0; /* in percent */ 1093 hog_part = -1; 1094 /* find all fixed partitions */ 1095 for (i = 0; i < lp->d_npartitions; i++) { 1096 pp = &lp->d_partitions[i]; 1097 if (part_set[i]) { 1098 if (part_size_type[i] == '*') { 1099 if (i == RAW_PART) { 1100 pp->p_size = lp->d_secperunit; 1101 } else { 1102 if (hog_part != -1) 1103 warnx("Too many '*' partitions (%c and %c)", 1104 hog_part + 'a',i + 'a'); 1105 else 1106 hog_part = i; 1107 } 1108 } else { 1109 off_t size; 1110 1111 size = pp->p_size; 1112 switch (part_size_type[i]) { 1113 case '%': 1114 total_percent += size; 1115 break; 1116 case 'k': 1117 case 'K': 1118 size *= 1024ULL; 1119 break; 1120 case 'm': 1121 case 'M': 1122 size *= 1024ULL * 1024ULL; 1123 break; 1124 case 'g': 1125 case 'G': 1126 size *= 1024ULL * 1024ULL * 1024ULL; 1127 break; 1128 case '\0': 1129 break; 1130 default: 1131 warnx("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1132 break; 1133 } 1134 /* don't count %'s yet */ 1135 if (part_size_type[i] != '%') { 1136 /* 1137 * for all not in sectors, convert to 1138 * sectors 1139 */ 1140 if (part_size_type[i] != '\0') { 1141 if (size % lp->d_secsize != 0) 1142 warnx("partition %c not an integer number of sectors", 1143 i + 'a'); 1144 size /= lp->d_secsize; 1145 pp->p_size = size; 1146 } 1147 /* else already in sectors */ 1148 if (i != RAW_PART) 1149 total_size += size; 1150 } 1151 } 1152 } 1153 } 1154 /* handle % partitions - note %'s don't need to add up to 100! */ 1155 if (total_percent != 0) { 1156 long free_space = lp->d_secperunit - total_size; 1157 if (total_percent > 100) { 1158 fprintf(stderr,"total percentage %lu is greater than 100\n", 1159 total_percent); 1160 errors++; 1161 } 1162 1163 if (free_space > 0) { 1164 for (i = 0; i < lp->d_npartitions; i++) { 1165 pp = &lp->d_partitions[i]; 1166 if (part_set[i] && part_size_type[i] == '%') { 1167 /* careful of overflows! and integer roundoff */ 1168 pp->p_size = ((double)pp->p_size/100) * free_space; 1169 total_size += pp->p_size; 1170 1171 /* FIX we can lose a sector or so due to roundoff per 1172 partition. A more complex algorithm could avoid that */ 1173 } 1174 } 1175 } else { 1176 fprintf(stderr, 1177 "%ld sectors available to give to '*' and '%%' partitions\n", 1178 free_space); 1179 errors++; 1180 /* fix? set all % partitions to size 0? */ 1181 } 1182 } 1183 /* give anything remaining to the hog partition */ 1184 if (hog_part != -1) { 1185 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; 1186 total_size = lp->d_secperunit; 1187 } 1188 1189 /* Now set the offsets for each partition */ 1190 current_offset = 0; /* in sectors */ 1191 seen_default_offset = 0; 1192 for (i = 0; i < lp->d_npartitions; i++) { 1193 part = 'a' + i; 1194 pp = &lp->d_partitions[i]; 1195 if (part_set[i]) { 1196 if (part_offset_type[i] == '*') { 1197 if (i == RAW_PART) { 1198 pp->p_offset = 0; 1199 } else { 1200 pp->p_offset = current_offset; 1201 seen_default_offset = 1; 1202 } 1203 } else { 1204 /* allow them to be out of order for old-style tables */ 1205 if (pp->p_offset < current_offset && 1206 seen_default_offset && i != RAW_PART && 1207 pp->p_fstype != FS_VINUM) { 1208 fprintf(stderr, 1209"Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1210 (long)pp->p_offset,i+'a',current_offset); 1211 fprintf(stderr, 1212"Labels with any *'s for offset must be in ascending order by sector\n"); 1213 errors++; 1214 } else if (pp->p_offset != current_offset && 1215 i != RAW_PART && seen_default_offset) { 1216 /* 1217 * this may give unneeded warnings if 1218 * partitions are out-of-order 1219 */ 1220 warnx( 1221"Offset %ld for partition %c doesn't match expected value %ld", 1222 (long)pp->p_offset, i + 'a', current_offset); 1223 } 1224 } 1225 if (i != RAW_PART) 1226 current_offset = pp->p_offset + pp->p_size; 1227 } 1228 } 1229 1230 for (i = 0; i < lp->d_npartitions; i++) { 1231 part = 'a' + i; 1232 pp = &lp->d_partitions[i]; 1233 if (pp->p_size == 0 && pp->p_offset != 0) 1234 warnx("partition %c: size 0, but offset %lu", 1235 part, (u_long)pp->p_offset); 1236#ifdef notdef 1237 if (pp->p_size % lp->d_secpercyl) 1238 warnx("partition %c: size %% cylinder-size != 0", 1239 part); 1240 if (pp->p_offset % lp->d_secpercyl) 1241 warnx("partition %c: offset %% cylinder-size != 0", 1242 part); 1243#endif 1244 if (pp->p_offset > lp->d_secperunit) { 1245 fprintf(stderr, 1246 "partition %c: offset past end of unit\n", part); 1247 errors++; 1248 } 1249 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1250 fprintf(stderr, 1251 "partition %c: partition extends past end of unit\n", 1252 part); 1253 errors++; 1254 } 1255 if (i == RAW_PART) { 1256 if (pp->p_fstype != FS_UNUSED) 1257 warnx("partition %c is not marked as unused!",part); 1258 if (pp->p_offset != 0) 1259 warnx("partition %c doesn't start at 0!",part); 1260 if (pp->p_size != lp->d_secperunit) 1261 warnx("partition %c doesn't cover the whole unit!",part); 1262 1263 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1264 (pp->p_size != lp->d_secperunit)) { 1265 warnx("An incorrect partition %c may cause problems for " 1266 "standard system utilities",part); 1267 } 1268 } 1269 1270 /* check for overlaps */ 1271 /* this will check for all possible overlaps once and only once */ 1272 for (j = 0; j < i; j++) { 1273 pp2 = &lp->d_partitions[j]; 1274 if (j != RAW_PART && i != RAW_PART && 1275 pp->p_fstype != FS_VINUM && 1276 pp2->p_fstype != FS_VINUM && 1277 part_set[i] && part_set[j]) { 1278 if (pp2->p_offset < pp->p_offset + pp->p_size && 1279 (pp2->p_offset + pp2->p_size > pp->p_offset || 1280 pp2->p_offset >= pp->p_offset)) { 1281 fprintf(stderr,"partitions %c and %c overlap!\n", 1282 j + 'a', i + 'a'); 1283 errors++; 1284 } 1285 } 1286 } 1287 } 1288 for (; i < MAXPARTITIONS; i++) { 1289 part = 'a' + i; 1290 pp = &lp->d_partitions[i]; 1291 if (pp->p_size || pp->p_offset) 1292 warnx("unused partition %c: size %d offset %lu", 1293 'a' + i, pp->p_size, (u_long)pp->p_offset); 1294 } 1295 return (errors); 1296} 1297 1298/* 1299 * When operating on a "virgin" disk, try getting an initial label 1300 * from the associated device driver. This might work for all device 1301 * drivers that are able to fetch some initial device parameters 1302 * without even having access to a (BSD) disklabel, like SCSI disks, 1303 * most IDE drives, or vn devices. 1304 * 1305 * The device name must be given in its "canonical" form. 1306 */ 1307static struct disklabel * 1308getvirginlabel(void) 1309{ 1310 static struct disklabel loclab; 1311 struct partition *dp; 1312 int f; 1313 u_int u; 1314 1315 if ((f = open(specname, O_RDONLY)) == -1) { 1316 warn("cannot open %s", specname); 1317 return (NULL); 1318 } 1319 1320 /* New world order */ 1321 if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || 1322 (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { 1323 close (f); 1324 return (NULL); 1325 } 1326 memset(&loclab, 0, sizeof loclab); 1327 loclab.d_magic = DISKMAGIC; 1328 loclab.d_magic2 = DISKMAGIC; 1329 loclab.d_secsize = secsize; 1330 loclab.d_secperunit = mediasize / secsize; 1331 1332 /* 1333 * Nobody in these enligthened days uses the CHS geometry for 1334 * anything, but nontheless try to get it right. If we fail 1335 * to get any good ideas from the device, construct something 1336 * which is IBM-PC friendly. 1337 */ 1338 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1339 loclab.d_nsectors = u; 1340 else 1341 loclab.d_nsectors = 63; 1342 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1343 loclab.d_ntracks = u; 1344 else if (loclab.d_secperunit <= 63*1*1024) 1345 loclab.d_ntracks = 1; 1346 else if (loclab.d_secperunit <= 63*16*1024) 1347 loclab.d_ntracks = 16; 1348 else 1349 loclab.d_ntracks = 255; 1350 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1351 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1352 loclab.d_npartitions = MAXPARTITIONS; 1353 1354 /* Various (unneeded) compat stuff */ 1355 loclab.d_rpm = 3600; 1356 loclab.d_bbsize = BBSIZE; 1357 loclab.d_interleave = 1; 1358 strncpy(loclab.d_typename, "amnesiac", 1359 sizeof(loclab.d_typename)); 1360 1361 dp = &loclab.d_partitions[RAW_PART]; 1362 dp->p_size = loclab.d_secperunit; 1363 loclab.d_checksum = dkcksum(&loclab); 1364 close (f); 1365 return (&loclab); 1366} 1367 1368static void 1369usage(void) 1370{ 1371 1372 fprintf(stderr, 1373 "%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", 1374 "usage: bsdlabel disk", 1375 "\t\t(to read label)", 1376 " bsdlabel -w [-n] [-m machine] disk [type]", 1377 "\t\t(to write label with existing boot program)", 1378 " bsdlabel -e [-n] [-m machine] disk", 1379 "\t\t(to edit label)", 1380 " bsdlabel -R [-n] [-m machine] disk protofile", 1381 "\t\t(to restore label with existing boot program)", 1382 " bsdlabel -B [-b boot] [-m machine] disk", 1383 "\t\t(to install boot program with existing on-disk label)", 1384 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]", 1385 "\t\t(to write label and install boot program)", 1386 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile", 1387 "\t\t(to restore label and install boot program)" 1388 ); 1389 exit(1); 1390} 1391