bsdlabel.c revision 107534
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#ifndef lint 44static const char copyright[] = 45"@(#) Copyright (c) 1987, 1993\n\ 46 The Regents of the University of California. All rights reserved.\n"; 47#endif /* not lint */ 48 49#ifndef lint 50#if 0 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 54#endif /* not lint */ 55 56#include <sys/cdefs.h> 57__FBSDID("$FreeBSD: head/sbin/bsdlabel/bsdlabel.c 107534 2002-12-02 23:49:59Z grog $"); 58 59#include <sys/param.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#ifdef PC98 68#include <sys/diskpc98.h> 69#else 70#include <sys/diskmbr.h> 71#endif 72#ifdef __sparc64__ 73#include <sys/sun_disklabel.h> 74#endif 75 76#include <unistd.h> 77#include <string.h> 78#include <stdio.h> 79#include <stdlib.h> 80#include <signal.h> 81#include <stdarg.h> 82#include <ctype.h> 83#include <err.h> 84#include <errno.h> 85 86#include "pathnames.h" 87 88/* 89 * Disklabel: read and write disklabels. 90 * The label is usually placed on one of the first sectors of the disk. 91 * Many machines also place a bootstrap in the same area, 92 * in which case the label is embedded in the bootstrap. 93 * The bootstrap source must leave space at the proper offset 94 * for the label on such machines. 95 */ 96 97#ifndef BBSIZE 98#define BBSIZE 8192 /* size of boot area, with label */ 99#endif 100 101/* FIX! These are too low, but are traditional */ 102#define DEFAULT_NEWFS_BLOCK 8192U 103#define DEFAULT_NEWFS_FRAG 1024U 104#define DEFAULT_NEWFS_CPG 16U 105 106#define BIG_NEWFS_BLOCK 16384U 107#define BIG_NEWFS_FRAG 2048U 108#define BIG_NEWFS_CPG 64U 109 110#if defined(__i386__) || defined(__ia64__) 111#define NUMBOOT 2 112#elif defined(__alpha__) || defined(__sparc64__) || defined(__powerpc__) 113#define NUMBOOT 1 114#else 115#error I do not know about this architecture. 116#endif 117 118void makelabel(const char *, const char *, struct disklabel *); 119int writelabel(int, const char *, struct disklabel *); 120void l_perror(const char *); 121struct disklabel *readlabel(int); 122struct disklabel *makebootarea(char *, struct disklabel *, int); 123void display(FILE *, const struct disklabel *); 124int edit(struct disklabel *, int); 125int editit(void); 126char *skip(char *); 127char *word(char *); 128int getasciilabel(FILE *, struct disklabel *); 129int getasciipartspec(char *, struct disklabel *, int, int); 130int checklabel(struct disklabel *); 131void setbootflag(struct disklabel *); 132void Warning(const char *, ...) __printflike(1, 2); 133void usage(void); 134struct disklabel *getvirginlabel(void); 135 136#define DEFEDITOR _PATH_VI 137#define streq(a,b) (strcmp(a,b) == 0) 138 139char *dkname; 140char *specname; 141char tmpfil[] = PATH_TMPFILE; 142 143char namebuf[BBSIZE], *np = namebuf; 144struct disklabel lab; 145char bootarea[BBSIZE]; 146char blank[] = ""; 147char unknown[] = "unknown"; 148 149#define MAX_PART ('z') 150#define MAX_NUM_PARTS (1 + MAX_PART - 'a') 151char part_size_type[MAX_NUM_PARTS]; 152char part_offset_type[MAX_NUM_PARTS]; 153int part_set[MAX_NUM_PARTS]; 154 155#if NUMBOOT > 0 156int installboot; /* non-zero if we should install a boot program */ 157char *bootbuf; /* pointer to buffer with remainder of boot prog */ 158int bootsize; /* size of remaining boot program */ 159char *xxboot; /* primary boot */ 160char *bootxx; /* secondary boot */ 161char boot0[MAXPATHLEN]; 162char boot1[MAXPATHLEN]; 163#endif 164 165enum { 166 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT 167} op = UNSPEC; 168 169int rflag; 170int disable_write; /* set to disable writing to disk label */ 171 172#define OPTIONS "BNRWb:enrs:w" 173 174int 175main(int argc, char *argv[]) 176{ 177 struct disklabel *lp; 178 FILE *t; 179 int ch, f = 0, flag, error = 0; 180 char *name = 0; 181 182 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 183 switch (ch) { 184#if NUMBOOT > 0 185 case 'B': 186 ++installboot; 187 break; 188 case 'b': 189 xxboot = optarg; 190 break; 191#if NUMBOOT > 1 192 case 's': 193 bootxx = optarg; 194 break; 195#endif 196#endif 197 case 'N': 198 if (op != UNSPEC) 199 usage(); 200 op = NOWRITE; 201 break; 202 case 'n': 203 disable_write = 1; 204 break; 205 case 'R': 206 if (op != UNSPEC) 207 usage(); 208 op = RESTORE; 209 break; 210 case 'W': 211 if (op != UNSPEC) 212 usage(); 213 op = WRITEABLE; 214 break; 215 case 'e': 216 if (op != UNSPEC) 217 usage(); 218 op = EDIT; 219 break; 220 case 'r': 221 ++rflag; 222 break; 223 case 'w': 224 if (op != UNSPEC) 225 usage(); 226 op = WRITE; 227 break; 228 case '?': 229 default: 230 usage(); 231 } 232 argc -= optind; 233 argv += optind; 234#if NUMBOOT > 0 235 if (installboot) { 236 rflag++; 237 if (op == UNSPEC) 238 op = WRITEBOOT; 239 } else { 240 if (op == UNSPEC) 241 op = READ; 242 xxboot = bootxx = 0; 243 } 244#else 245 if (op == UNSPEC) 246 op = READ; 247#endif 248 if (argc < 1) 249 usage(); 250 251 dkname = argv[0]; 252 if (dkname[0] != '/') { 253 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART); 254 specname = np; 255 np += strlen(specname) + 1; 256 } else 257 specname = dkname; 258 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 259 if (f < 0 && errno == ENOENT && dkname[0] != '/') { 260 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname); 261 np = namebuf + strlen(specname) + 1; 262 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 263 } 264 if (f < 0) 265 err(4, "%s", specname); 266 267 switch(op) { 268 269 case UNSPEC: 270 break; 271 272 case EDIT: 273 if (argc != 1) 274 usage(); 275 lp = readlabel(f); 276 error = edit(lp, f); 277 break; 278 279 case NOWRITE: 280 flag = 0; 281 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 282 err(4, "ioctl DIOCWLABEL"); 283 break; 284 285 case READ: 286 if (argc != 1) 287 usage(); 288 lp = readlabel(f); 289 display(stdout, lp); 290 error = checklabel(lp); 291 break; 292 293 case RESTORE: 294#if NUMBOOT > 0 295 if (installboot && argc == 3) { 296 makelabel(argv[2], 0, &lab); 297 argc--; 298 299 /* 300 * We only called makelabel() for its side effect 301 * of setting the bootstrap file names. Discard 302 * all changes to `lab' so that all values in the 303 * final label come from the ASCII label. 304 */ 305 bzero((char *)&lab, sizeof(lab)); 306 } 307#endif 308 if (argc != 2) 309 usage(); 310 if (!(t = fopen(argv[1], "r"))) 311 err(4, "%s", argv[1]); 312 if (!getasciilabel(t, &lab)) 313 exit(1); 314 lp = makebootarea(bootarea, &lab, f); 315 *lp = lab; 316 error = writelabel(f, bootarea, lp); 317 break; 318 319 case WRITE: 320 if (argc == 3) { 321 name = argv[2]; 322 argc--; 323 } 324 if (argc != 2) 325 usage(); 326 makelabel(argv[1], name, &lab); 327 lp = makebootarea(bootarea, &lab, f); 328 *lp = lab; 329 if (checklabel(lp) == 0) 330 error = writelabel(f, bootarea, lp); 331 break; 332 333 case WRITEABLE: 334 flag = 1; 335 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 336 err(4, "ioctl DIOCWLABEL"); 337 break; 338 339#if NUMBOOT > 0 340 case WRITEBOOT: 341 { 342 struct disklabel tlab; 343 344 lp = readlabel(f); 345 tlab = *lp; 346 if (argc == 2) 347 makelabel(argv[1], 0, &lab); 348 lp = makebootarea(bootarea, &lab, f); 349 *lp = tlab; 350 if (checklabel(lp) == 0) 351 error = writelabel(f, bootarea, lp); 352 break; 353 } 354#endif 355 } 356 exit(error); 357} 358 359/* 360 * Construct a prototype disklabel from /etc/disktab. As a side 361 * effect, set the names of the primary and secondary boot files 362 * if specified. 363 */ 364void 365makelabel(const char *type, const char *name, struct disklabel *lp) 366{ 367 struct disklabel *dp; 368 369 if (strcmp(type, "auto") == 0) 370 dp = getvirginlabel(); 371 else 372 dp = getdiskbyname(type); 373 if (dp == NULL) 374 errx(1, "%s: unknown disk type", type); 375 *lp = *dp; 376 bzero(lp->d_packname, sizeof(lp->d_packname)); 377 if (name) 378 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 379} 380 381int 382writelabel(int f, const char *boot, struct disklabel *lp) 383{ 384 int flag; 385#ifdef __alpha__ 386 u_long *p, sum; 387 int i; 388#endif 389#ifdef __sparc64__ 390 struct sun_disklabel *sl; 391 u_short cksum, *sp1, *sp2; 392 struct partition *npp; 393 struct sun_dkpart *spp; 394 int i, secpercyl; 395#endif 396 397 if (disable_write) { 398 Warning("write to disk label supressed - label was as follows:"); 399 display(stdout, lp); 400 return (0); 401 } else { 402 setbootflag(lp); 403 lp->d_magic = DISKMAGIC; 404 lp->d_magic2 = DISKMAGIC; 405 lp->d_checksum = 0; 406 lp->d_checksum = dkcksum(lp); 407 if (rflag) { 408 /* 409 * First set the kernel disk label, 410 * then write a label to the raw disk. 411 * If the SDINFO ioctl fails because it is unimplemented, 412 * keep going; otherwise, the kernel consistency checks 413 * may prevent us from changing the current (in-core) 414 * label. 415 */ 416 if (ioctl(f, DIOCSDINFO, lp) < 0 && 417 errno != ENODEV && errno != ENOTTY) { 418 l_perror("ioctl DIOCSDINFO"); 419 return (1); 420 } 421 (void)lseek(f, (off_t)0, SEEK_SET); 422 423#ifdef __alpha__ 424 /* 425 * Generate the bootblock checksum for the SRM console. 426 */ 427 for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++) 428 sum += p[i]; 429 p[63] = sum; 430#endif 431#ifdef __sparc64__ 432 /* 433 * Generate a Sun disklabel around the BSD label for 434 * PROM compatability. 435 */ 436 sl = (struct sun_disklabel *)boot; 437 memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname)); 438 sl->sl_rpm = lp->d_rpm; 439 sl->sl_pcylinders = lp->d_ncylinders + 440 lp->d_acylinders; /* XXX */ 441 sl->sl_sparespercyl = lp->d_sparespercyl; 442 sl->sl_interleave = lp->d_interleave; 443 sl->sl_ncylinders = lp->d_ncylinders; 444 sl->sl_acylinders = lp->d_acylinders; 445 sl->sl_ntracks = lp->d_ntracks; 446 sl->sl_nsectors = lp->d_nsectors; 447 sl->sl_magic = SUN_DKMAGIC; 448 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 449 for (i = 0; i < 8; i++) { 450 spp = &sl->sl_part[i]; 451 npp = &lp->d_partitions[i]; 452 /* 453 * SunOS partitions must start on a cylinder 454 * boundary. Note this restriction is forced 455 * upon FreeBSD/sparc64 labels too, since we 456 * want to keep both labels synchronised. 457 */ 458 spp->sdkp_cyloffset = npp->p_offset / secpercyl; 459 spp->sdkp_nsectors = npp->p_size; 460 } 461 462 /* Compute the XOR checksum. */ 463 sp1 = (u_short *)sl; 464 sp2 = (u_short *)(sl + 1); 465 sl->sl_cksum = cksum = 0; 466 while (sp1 < sp2) 467 cksum ^= *sp1++; 468 sl->sl_cksum = cksum; 469#endif 470 /* 471 * write enable label sector before write (if necessary), 472 * disable after writing. 473 */ 474 flag = 1; 475 (void)ioctl(f, DIOCWLABEL, &flag); 476 if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) { 477 warn("write"); 478 return (1); 479 } 480#if NUMBOOT > 0 481 /* 482 * Output the remainder of the disklabel 483 */ 484 if (bootbuf && write(f, bootbuf, bootsize) != bootsize) { 485 warn("write"); 486 return(1); 487 } 488#endif 489 flag = 0; 490 (void) ioctl(f, DIOCWLABEL, &flag); 491 } else if (ioctl(f, DIOCWDINFO, lp) < 0) { 492 l_perror("ioctl DIOCWDINFO"); 493 return (1); 494 } 495 } 496 return (0); 497} 498 499void 500l_perror(const char *s) 501{ 502 switch (errno) { 503 504 case ESRCH: 505 warnx("%s: no disk label on disk;", s); 506 fprintf(stderr, "add \"-r\" to install initial label\n"); 507 break; 508 509 case EINVAL: 510 warnx("%s: label magic number or checksum is wrong!", s); 511 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 512 break; 513 514 case EBUSY: 515 warnx("%s: open partition would move or shrink", s); 516 break; 517 518 case EXDEV: 519 warnx("%s: '%c' partition must start at beginning of disk", 520 s, 'a' + RAW_PART); 521 break; 522 523 default: 524 warn((char *)NULL); 525 break; 526 } 527} 528 529/* 530 * Fetch disklabel for disk. 531 * Use ioctl to get label unless -r flag is given. 532 */ 533struct disklabel * 534readlabel(int f) 535{ 536 struct disklabel *lp; 537 538 if (rflag) { 539 if (read(f, bootarea, BBSIZE) < BBSIZE) 540 err(4, "%s", specname); 541 for (lp = (struct disklabel *)bootarea; 542 lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp)); 543 lp = (struct disklabel *)((char *)lp + 16)) 544 if (lp->d_magic == DISKMAGIC && 545 lp->d_magic2 == DISKMAGIC) 546 break; 547 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) || 548 lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC || 549 dkcksum(lp) != 0) 550 errx(1, 551 "bad pack magic number (label is damaged, or pack is unlabeled)"); 552 } else { 553 lp = &lab; 554 if (ioctl(f, DIOCGDINFO, lp) < 0) 555 err(4, "ioctl DIOCGDINFO"); 556 } 557 return (lp); 558} 559 560/* 561 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 562 * Returns a pointer to the disklabel portion of the bootarea. 563 */ 564struct disklabel * 565makebootarea(char *boot, struct disklabel *dp, int f) 566{ 567 struct disklabel *lp; 568 char *p; 569 int b; 570#if NUMBOOT > 0 571 char *dkbasename; 572 struct stat sb; 573#endif 574#ifdef __alpha__ 575 u_long *bootinfo; 576 int n; 577#endif 578#ifdef __i386__ 579 char *tmpbuf; 580 int i, found; 581#endif 582 583 /* XXX */ 584 if (dp->d_secsize == 0) { 585 dp->d_secsize = DEV_BSIZE; 586 dp->d_bbsize = BBSIZE; 587 } 588 lp = (struct disklabel *) 589 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET); 590 bzero((char *)lp, sizeof *lp); 591#if NUMBOOT > 0 592 /* 593 * If we are not installing a boot program but we are installing a 594 * label on disk then we must read the current bootarea so we don't 595 * clobber the existing boot. 596 */ 597 if (!installboot) { 598 if (rflag) { 599 if (read(f, boot, BBSIZE) < BBSIZE) 600 err(4, "%s", specname); 601 bzero((char *)lp, sizeof *lp); 602 } 603 return (lp); 604 } 605 /* 606 * We are installing a boot program. Determine the name(s) and 607 * read them into the appropriate places in the boot area. 608 */ 609 if (!xxboot || !bootxx) { 610 dkbasename = np; 611 if ((p = rindex(dkname, '/')) == NULL) 612 p = dkname; 613 else 614 p++; 615 while (*p && !isdigit(*p)) 616 *np++ = *p++; 617 *np++ = '\0'; 618 619 if (!xxboot) { 620 (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR); 621 xxboot = boot0; 622 } 623#if NUMBOOT > 1 624 if (!bootxx) { 625 (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR); 626 bootxx = boot1; 627 } 628#endif 629 } 630 631 /* 632 * Strange rules: 633 * 1. One-piece bootstrap (hp300/hp800) 634 * 1. One-piece bootstrap (alpha/sparc64) 635 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest 636 * is remembered and written later following the bootarea. 637 * 2. Two-piece bootstraps (i386/ia64) 638 * up to d_secsize bytes of ``xxboot'' go in first d_secsize 639 * bytes of bootarea, remaining d_bbsize-d_secsize filled 640 * from ``bootxx''. 641 */ 642 b = open(xxboot, O_RDONLY); 643 if (b < 0) 644 err(4, "%s", xxboot); 645#if NUMBOOT > 1 646#ifdef __i386__ 647 /* 648 * XXX Botch alert. 649 * The i386 has the so-called fdisk table embedded into the 650 * primary bootstrap. We take care to not clobber it, but 651 * only if it does already contain some data. (Otherwise, 652 * the xxboot provides a template.) 653 */ 654 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) 655 err(4, "%s", xxboot); 656 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 657#endif /* __i386__ */ 658 if (read(b, boot, (int)dp->d_secsize) < 0) 659 err(4, "%s", xxboot); 660 (void)close(b); 661#ifdef __i386__ 662 for (i = DOSPARTOFF, found = 0; 663 !found && i < (int)(DOSPARTOFF + NDOSPART*sizeof(struct dos_partition)); 664 i++) 665 found = tmpbuf[i] != 0; 666 if (found) 667 memcpy((void *)&boot[DOSPARTOFF], 668 (void *)&tmpbuf[DOSPARTOFF], 669 NDOSPART * sizeof(struct dos_partition)); 670 free(tmpbuf); 671#endif /* __i386__ */ 672 b = open(bootxx, O_RDONLY); 673 if (b < 0) 674 err(4, "%s", bootxx); 675 if (fstat(b, &sb) != 0) 676 err(4, "%s", bootxx); 677 if (dp->d_secsize + sb.st_size > dp->d_bbsize) 678 errx(4, "%s too large", bootxx); 679 if (read(b, &boot[dp->d_secsize], 680 (int)(dp->d_bbsize-dp->d_secsize)) < 0) 681 err(4, "%s", bootxx); 682#else /* !(NUMBOOT > 1) */ 683#ifdef __alpha__ 684 /* 685 * On the alpha, the primary bootstrap starts at the 686 * second sector of the boot area. The first sector 687 * contains the label and must be edited to contain the 688 * size and location of the primary bootstrap. 689 */ 690 n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize); 691 if (n < 0) 692 err(4, "%s", xxboot); 693 bootinfo = (u_long *)(boot + 480); 694 bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize; 695 bootinfo[1] = 1; /* start at sector 1 */ 696 bootinfo[2] = 0; /* flags (must be zero) */ 697#else /* !__alpha__ */ 698 if (read(b, boot, (int)dp->d_bbsize) < 0) 699 err(4, "%s", xxboot); 700#endif /* __alpha__ */ 701 if (fstat(b, &sb) != 0) 702 err(4, "%s", xxboot); 703 bootsize = (int)sb.st_size - dp->d_bbsize; 704 if (bootsize > 0) { 705 /* XXX assume d_secsize is a power of two */ 706 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1); 707 bootbuf = (char *)malloc((size_t)bootsize); 708 if (bootbuf == 0) 709 err(4, "%s", xxboot); 710 if (read(b, bootbuf, bootsize) < 0) { 711 free(bootbuf); 712 err(4, "%s", xxboot); 713 } 714 } 715#endif /* NUMBOOT > 1 */ 716 (void)close(b); 717#endif /* NUMBOOT > 0 */ 718 /* 719 * Make sure no part of the bootstrap is written in the area 720 * reserved for the label. 721 */ 722 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++) 723 if (*p) 724 errx(2, "bootstrap doesn't leave room for disk label"); 725 return (lp); 726} 727 728void 729display(FILE *f, const struct disklabel *lp) 730{ 731 int i, j; 732 const struct partition *pp; 733 734 fprintf(f, "# %s:\n", specname); 735 if (lp->d_type < DKMAXTYPES) 736 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 737 else 738 fprintf(f, "type: %u\n", lp->d_type); 739 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 740 lp->d_typename); 741 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 742 lp->d_packname); 743 fprintf(f, "flags:"); 744 if (lp->d_flags & D_REMOVABLE) 745 fprintf(f, " removeable"); 746 if (lp->d_flags & D_ECC) 747 fprintf(f, " ecc"); 748 if (lp->d_flags & D_BADSECT) 749 fprintf(f, " badsect"); 750 fprintf(f, "\n"); 751 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 752 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 753 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 754 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 755 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 756 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 757 fprintf(f, "rpm: %u\n", lp->d_rpm); 758 fprintf(f, "interleave: %u\n", lp->d_interleave); 759 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 760 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 761 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 762 (u_long)lp->d_headswitch); 763 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 764 (u_long)lp->d_trkseek); 765 fprintf(f, "drivedata: "); 766 for (i = NDDATA - 1; i >= 0; i--) 767 if (lp->d_drivedata[i]) 768 break; 769 if (i < 0) 770 i = 0; 771 for (j = 0; j <= i; j++) 772 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 773 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 774 fprintf(f, 775 "# size offset fstype [fsize bsize bps/cpg]\n"); 776 pp = lp->d_partitions; 777 for (i = 0; i < lp->d_npartitions; i++, pp++) { 778 if (pp->p_size) { 779 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 780 (u_long)pp->p_size, (u_long)pp->p_offset); 781 if (pp->p_fstype < FSMAXTYPES) 782 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 783 else 784 fprintf(f, "%8d", pp->p_fstype); 785 switch (pp->p_fstype) { 786 787 case FS_UNUSED: /* XXX */ 788 fprintf(f, " %5lu %5lu %5.5s ", 789 (u_long)pp->p_fsize, 790 (u_long)(pp->p_fsize * pp->p_frag), ""); 791 break; 792 793 case FS_BSDFFS: 794 fprintf(f, " %5lu %5lu %5u ", 795 (u_long)pp->p_fsize, 796 (u_long)(pp->p_fsize * pp->p_frag), 797 pp->p_cpg); 798 break; 799 800 case FS_BSDLFS: 801 fprintf(f, " %5lu %5lu %5d", 802 (u_long)pp->p_fsize, 803 (u_long)(pp->p_fsize * pp->p_frag), 804 pp->p_cpg); 805 break; 806 807 default: 808 fprintf(f, "%20.20s", ""); 809 break; 810 } 811 fprintf(f, "\t# (Cyl. %4lu", 812 (u_long)(pp->p_offset / lp->d_secpercyl)); 813 if (pp->p_offset % lp->d_secpercyl) 814 putc('*', f); 815 else 816 putc(' ', f); 817 fprintf(f, "- %lu", 818 (u_long)((pp->p_offset + pp->p_size + 819 lp->d_secpercyl - 1) / 820 lp->d_secpercyl - 1)); 821 if (pp->p_size % lp->d_secpercyl) 822 putc('*', f); 823 fprintf(f, ")\n"); 824 } 825 } 826 fflush(f); 827} 828 829int 830edit(struct disklabel *lp, int f) 831{ 832 int c, fd; 833 struct disklabel label; 834 FILE *fp; 835 836 if ((fd = mkstemp(tmpfil)) == -1 || 837 (fp = fdopen(fd, "w")) == NULL) { 838 warnx("can't create %s", tmpfil); 839 return (1); 840 } 841 display(fp, lp); 842 fclose(fp); 843 for (;;) { 844 if (!editit()) 845 break; 846 fp = fopen(tmpfil, "r"); 847 if (fp == NULL) { 848 warnx("can't reopen %s for reading", tmpfil); 849 break; 850 } 851 bzero((char *)&label, sizeof(label)); 852 if (getasciilabel(fp, &label)) { 853 *lp = label; 854 if (writelabel(f, bootarea, lp) == 0) { 855 fclose(fp); 856 (void) unlink(tmpfil); 857 return (0); 858 } 859 } 860 fclose(fp); 861 printf("re-edit the label? [y]: "); fflush(stdout); 862 c = getchar(); 863 if (c != EOF && c != (int)'\n') 864 while (getchar() != (int)'\n') 865 ; 866 if (c == (int)'n') 867 break; 868 } 869 (void) unlink(tmpfil); 870 return (1); 871} 872 873int 874editit(void) 875{ 876 int pid, xpid; 877 int locstat, omask; 878 const char *ed; 879 880 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 881 while ((pid = fork()) < 0) { 882 if (errno == EPROCLIM) { 883 warnx("you have too many processes"); 884 return(0); 885 } 886 if (errno != EAGAIN) { 887 warn("fork"); 888 return(0); 889 } 890 sleep(1); 891 } 892 if (pid == 0) { 893 sigsetmask(omask); 894 setgid(getgid()); 895 setuid(getuid()); 896 if ((ed = getenv("EDITOR")) == (char *)0) 897 ed = DEFEDITOR; 898 execlp(ed, ed, tmpfil, (char *)0); 899 err(1, "%s", ed); 900 } 901 while ((xpid = wait(&locstat)) >= 0) 902 if (xpid == pid) 903 break; 904 sigsetmask(omask); 905 return(!locstat); 906} 907 908char * 909skip(char *cp) 910{ 911 912 while (*cp != '\0' && isspace(*cp)) 913 cp++; 914 if (*cp == '\0' || *cp == '#') 915 return (NULL); 916 return (cp); 917} 918 919char * 920word(char *cp) 921{ 922 char c; 923 924 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 925 cp++; 926 if ((c = *cp) != '\0') { 927 *cp++ = '\0'; 928 if (c != '#') 929 return (skip(cp)); 930 } 931 return (NULL); 932} 933 934/* 935 * Read an ascii label in from fd f, 936 * in the same format as that put out by display(), 937 * and fill in lp. 938 */ 939int 940getasciilabel(FILE *f, struct disklabel *lp) 941{ 942 char *cp; 943 const char **cpp; 944 u_int part; 945 char *tp, line[BUFSIZ]; 946 u_long v; 947 int lineno = 0, errors = 0; 948 int i; 949 950 lp->d_bbsize = BBSIZE; /* XXX */ 951 lp->d_sbsize = 0; /* XXX */ 952 while (fgets(line, sizeof(line) - 1, f)) { 953 lineno++; 954 if ((cp = index(line,'\n')) != 0) 955 *cp = '\0'; 956 cp = skip(line); 957 if (cp == NULL) 958 continue; 959 tp = index(cp, ':'); 960 if (tp == NULL) { 961 fprintf(stderr, "line %d: syntax error\n", lineno); 962 errors++; 963 continue; 964 } 965 *tp++ = '\0', tp = skip(tp); 966 if (streq(cp, "type")) { 967 if (tp == NULL) 968 tp = unknown; 969 cpp = dktypenames; 970 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 971 if (*cpp && streq(*cpp, tp)) { 972 lp->d_type = cpp - dktypenames; 973 break; 974 } 975 if (cpp < &dktypenames[DKMAXTYPES]) 976 continue; 977 v = strtoul(tp, NULL, 10); 978 if (v >= DKMAXTYPES) 979 fprintf(stderr, "line %d:%s %lu\n", lineno, 980 "Warning, unknown disk type", v); 981 lp->d_type = v; 982 continue; 983 } 984 if (streq(cp, "flags")) { 985 for (v = 0; (cp = tp) && *cp != '\0';) { 986 tp = word(cp); 987 if (streq(cp, "removeable")) 988 v |= D_REMOVABLE; 989 else if (streq(cp, "ecc")) 990 v |= D_ECC; 991 else if (streq(cp, "badsect")) 992 v |= D_BADSECT; 993 else { 994 fprintf(stderr, 995 "line %d: %s: bad flag\n", 996 lineno, cp); 997 errors++; 998 } 999 } 1000 lp->d_flags = v; 1001 continue; 1002 } 1003 if (streq(cp, "drivedata")) { 1004 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 1005 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 1006 tp = word(cp); 1007 } 1008 continue; 1009 } 1010 if (sscanf(cp, "%lu partitions", &v) == 1) { 1011 if (v == 0 || v > MAXPARTITIONS) { 1012 fprintf(stderr, 1013 "line %d: bad # of partitions\n", lineno); 1014 lp->d_npartitions = MAXPARTITIONS; 1015 errors++; 1016 } else 1017 lp->d_npartitions = v; 1018 continue; 1019 } 1020 if (tp == NULL) 1021 tp = blank; 1022 if (streq(cp, "disk")) { 1023 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 1024 continue; 1025 } 1026 if (streq(cp, "label")) { 1027 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 1028 continue; 1029 } 1030 if (streq(cp, "bytes/sector")) { 1031 v = strtoul(tp, NULL, 10); 1032 if (v == 0 || (v % DEV_BSIZE) != 0) { 1033 fprintf(stderr, 1034 "line %d: %s: bad sector size\n", 1035 lineno, tp); 1036 errors++; 1037 } else 1038 lp->d_secsize = v; 1039 continue; 1040 } 1041 if (streq(cp, "sectors/track")) { 1042 v = strtoul(tp, NULL, 10); 1043#if (ULONG_MAX != 0xffffffffUL) 1044 if (v == 0 || v > 0xffffffff) { 1045#else 1046 if (v == 0) { 1047#endif 1048 fprintf(stderr, "line %d: %s: bad %s\n", 1049 lineno, tp, cp); 1050 errors++; 1051 } else 1052 lp->d_nsectors = v; 1053 continue; 1054 } 1055 if (streq(cp, "sectors/cylinder")) { 1056 v = strtoul(tp, NULL, 10); 1057 if (v == 0) { 1058 fprintf(stderr, "line %d: %s: bad %s\n", 1059 lineno, tp, cp); 1060 errors++; 1061 } else 1062 lp->d_secpercyl = v; 1063 continue; 1064 } 1065 if (streq(cp, "tracks/cylinder")) { 1066 v = strtoul(tp, NULL, 10); 1067 if (v == 0) { 1068 fprintf(stderr, "line %d: %s: bad %s\n", 1069 lineno, tp, cp); 1070 errors++; 1071 } else 1072 lp->d_ntracks = v; 1073 continue; 1074 } 1075 if (streq(cp, "cylinders")) { 1076 v = strtoul(tp, NULL, 10); 1077 if (v == 0) { 1078 fprintf(stderr, "line %d: %s: bad %s\n", 1079 lineno, tp, cp); 1080 errors++; 1081 } else 1082 lp->d_ncylinders = v; 1083 continue; 1084 } 1085 if (streq(cp, "sectors/unit")) { 1086 v = strtoul(tp, NULL, 10); 1087 if (v == 0) { 1088 fprintf(stderr, "line %d: %s: bad %s\n", 1089 lineno, tp, cp); 1090 errors++; 1091 } else 1092 lp->d_secperunit = v; 1093 continue; 1094 } 1095 if (streq(cp, "rpm")) { 1096 v = strtoul(tp, NULL, 10); 1097 if (v == 0 || v > USHRT_MAX) { 1098 fprintf(stderr, "line %d: %s: bad %s\n", 1099 lineno, tp, cp); 1100 errors++; 1101 } else 1102 lp->d_rpm = v; 1103 continue; 1104 } 1105 if (streq(cp, "interleave")) { 1106 v = strtoul(tp, NULL, 10); 1107 if (v == 0 || v > USHRT_MAX) { 1108 fprintf(stderr, "line %d: %s: bad %s\n", 1109 lineno, tp, cp); 1110 errors++; 1111 } else 1112 lp->d_interleave = v; 1113 continue; 1114 } 1115 if (streq(cp, "trackskew")) { 1116 v = strtoul(tp, NULL, 10); 1117 if (v > USHRT_MAX) { 1118 fprintf(stderr, "line %d: %s: bad %s\n", 1119 lineno, tp, cp); 1120 errors++; 1121 } else 1122 lp->d_trackskew = v; 1123 continue; 1124 } 1125 if (streq(cp, "cylinderskew")) { 1126 v = strtoul(tp, NULL, 10); 1127 if (v > USHRT_MAX) { 1128 fprintf(stderr, "line %d: %s: bad %s\n", 1129 lineno, tp, cp); 1130 errors++; 1131 } else 1132 lp->d_cylskew = v; 1133 continue; 1134 } 1135 if (streq(cp, "headswitch")) { 1136 v = strtoul(tp, NULL, 10); 1137 lp->d_headswitch = v; 1138 continue; 1139 } 1140 if (streq(cp, "track-to-track seek")) { 1141 v = strtoul(tp, NULL, 10); 1142 lp->d_trkseek = v; 1143 continue; 1144 } 1145 /* the ':' was removed above */ 1146 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 1147 fprintf(stderr, 1148 "line %d: %s: Unknown disklabel field\n", lineno, 1149 cp); 1150 errors++; 1151 continue; 1152 } 1153 1154 /* Process a partition specification line. */ 1155 part = *cp - 'a'; 1156 if (part >= lp->d_npartitions) { 1157 fprintf(stderr, 1158 "line %d: partition name out of range a-%c: %s\n", 1159 lineno, 'a' + lp->d_npartitions - 1, cp); 1160 errors++; 1161 continue; 1162 } 1163 part_set[part] = 1; 1164 1165 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1166 errors++; 1167 break; 1168 } 1169 } 1170 errors += checklabel(lp); 1171 return (errors == 0); 1172} 1173 1174#define NXTNUM(n) do { \ 1175 if (tp == NULL) { \ 1176 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1177 return (1); \ 1178 } else { \ 1179 cp = tp, tp = word(cp); \ 1180 (n) = strtoul(cp, NULL, 10); \ 1181 } \ 1182} while (0) 1183 1184/* retain 1 character following number */ 1185#define NXTWORD(w,n) do { \ 1186 if (tp == NULL) { \ 1187 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1188 return (1); \ 1189 } else { \ 1190 char *tmp; \ 1191 cp = tp, tp = word(cp); \ 1192 (n) = strtoul(cp, &tmp, 10); \ 1193 if (tmp) (w) = *tmp; \ 1194 } \ 1195} while (0) 1196 1197/* 1198 * Read a partition line into partition `part' in the specified disklabel. 1199 * Return 0 on success, 1 on failure. 1200 */ 1201int 1202getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1203{ 1204 struct partition *pp; 1205 char *cp; 1206 const char **cpp; 1207 u_long v; 1208 1209 pp = &lp->d_partitions[part]; 1210 cp = NULL; 1211 1212 v = 0; 1213 NXTWORD(part_size_type[part],v); 1214 if (v == 0 && part_size_type[part] != '*') { 1215 fprintf(stderr, 1216 "line %d: %s: bad partition size\n", lineno, cp); 1217 return (1); 1218 } 1219 pp->p_size = v; 1220 1221 v = 0; 1222 NXTWORD(part_offset_type[part],v); 1223 if (v == 0 && part_offset_type[part] != '*' && 1224 part_offset_type[part] != '\0') { 1225 fprintf(stderr, 1226 "line %d: %s: bad partition offset\n", lineno, cp); 1227 return (1); 1228 } 1229 pp->p_offset = v; 1230 cp = tp, tp = word(cp); 1231 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1232 if (*cpp && streq(*cpp, cp)) 1233 break; 1234 if (*cpp != NULL) { 1235 pp->p_fstype = cpp - fstypenames; 1236 } else { 1237 if (isdigit(*cp)) 1238 v = strtoul(cp, NULL, 10); 1239 else 1240 v = FSMAXTYPES; 1241 if (v >= FSMAXTYPES) { 1242 fprintf(stderr, 1243 "line %d: Warning, unknown file system type %s\n", 1244 lineno, cp); 1245 v = FS_UNUSED; 1246 } 1247 pp->p_fstype = v; 1248 } 1249 1250 switch (pp->p_fstype) { 1251 case FS_UNUSED: 1252 /* 1253 * allow us to accept defaults for 1254 * fsize/frag/cpg 1255 */ 1256 if (tp) { 1257 NXTNUM(pp->p_fsize); 1258 if (pp->p_fsize == 0) 1259 break; 1260 NXTNUM(v); 1261 pp->p_frag = v / pp->p_fsize; 1262 } 1263 /* else default to 0's */ 1264 break; 1265 1266 /* These happen to be the same */ 1267 case FS_BSDFFS: 1268 case FS_BSDLFS: 1269 if (tp) { 1270 NXTNUM(pp->p_fsize); 1271 if (pp->p_fsize == 0) 1272 break; 1273 NXTNUM(v); 1274 pp->p_frag = v / pp->p_fsize; 1275 NXTNUM(pp->p_cpg); 1276 } else { 1277 /* 1278 * FIX! poor attempt at adaptive 1279 */ 1280 /* 1 GB */ 1281 if (pp->p_size < 1024*1024*1024 / lp->d_secsize) { 1282 /* 1283 * FIX! These are too low, but are traditional 1284 */ 1285 pp->p_fsize = DEFAULT_NEWFS_FRAG; 1286 pp->p_frag = DEFAULT_NEWFS_BLOCK / 1287 DEFAULT_NEWFS_FRAG; 1288 pp->p_cpg = DEFAULT_NEWFS_CPG; 1289 } else { 1290 pp->p_fsize = BIG_NEWFS_FRAG; 1291 pp->p_frag = BIG_NEWFS_BLOCK / 1292 BIG_NEWFS_FRAG; 1293 pp->p_cpg = BIG_NEWFS_CPG; 1294 } 1295 } 1296 default: 1297 break; 1298 } 1299 return (0); 1300} 1301 1302/* 1303 * Check disklabel for errors and fill in 1304 * derived fields according to supplied values. 1305 */ 1306int 1307checklabel(struct disklabel *lp) 1308{ 1309 struct partition *pp; 1310 int i, errors = 0; 1311 char part; 1312 u_long total_size, total_percent, current_offset; 1313 int seen_default_offset; 1314 int hog_part; 1315 int j; 1316 struct partition *pp2; 1317 1318 if (lp->d_secsize == 0) { 1319 fprintf(stderr, "sector size 0\n"); 1320 return (1); 1321 } 1322 if (lp->d_nsectors == 0) { 1323 fprintf(stderr, "sectors/track 0\n"); 1324 return (1); 1325 } 1326 if (lp->d_ntracks == 0) { 1327 fprintf(stderr, "tracks/cylinder 0\n"); 1328 return (1); 1329 } 1330 if (lp->d_ncylinders == 0) { 1331 fprintf(stderr, "cylinders/unit 0\n"); 1332 errors++; 1333 } 1334 if (lp->d_rpm == 0) 1335 Warning("revolutions/minute 0"); 1336 if (lp->d_secpercyl == 0) 1337 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1338 if (lp->d_secperunit == 0) 1339 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1340 if (lp->d_bbsize == 0) { 1341 fprintf(stderr, "boot block size 0\n"); 1342 errors++; 1343 } else if (lp->d_bbsize % lp->d_secsize) 1344 Warning("boot block size %% sector-size != 0"); 1345 if (lp->d_npartitions > MAXPARTITIONS) 1346 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", 1347 (u_long)lp->d_npartitions, MAXPARTITIONS); 1348 1349 /* first allocate space to the partitions, then offsets */ 1350 total_size = 0; /* in sectors */ 1351 total_percent = 0; /* in percent */ 1352 hog_part = -1; 1353 /* find all fixed partitions */ 1354 for (i = 0; i < lp->d_npartitions; i++) { 1355 pp = &lp->d_partitions[i]; 1356 if (part_set[i]) { 1357 if (part_size_type[i] == '*') { 1358 if (i == RAW_PART) { 1359 pp->p_size = lp->d_secperunit; 1360 } else { 1361 if (hog_part != -1) 1362 Warning("Too many '*' partitions (%c and %c)", 1363 hog_part + 'a',i + 'a'); 1364 else 1365 hog_part = i; 1366 } 1367 } else { 1368 off_t size; 1369 1370 size = pp->p_size; 1371 switch (part_size_type[i]) { 1372 case '%': 1373 total_percent += size; 1374 break; 1375 case 'k': 1376 case 'K': 1377 size *= 1024ULL; 1378 break; 1379 case 'm': 1380 case 'M': 1381 size *= 1024ULL * 1024ULL; 1382 break; 1383 case 'g': 1384 case 'G': 1385 size *= 1024ULL * 1024ULL * 1024ULL; 1386 break; 1387 case '\0': 1388 break; 1389 default: 1390 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1391 break; 1392 } 1393 /* don't count %'s yet */ 1394 if (part_size_type[i] != '%') { 1395 /* 1396 * for all not in sectors, convert to 1397 * sectors 1398 */ 1399 if (part_size_type[i] != '\0') { 1400 if (size % lp->d_secsize != 0) 1401 Warning("partition %c not an integer number of sectors", 1402 i + 'a'); 1403 size /= lp->d_secsize; 1404 pp->p_size = size; 1405 } 1406 /* else already in sectors */ 1407 if (i != RAW_PART) 1408 total_size += size; 1409 } 1410 } 1411 } 1412 } 1413 /* handle % partitions - note %'s don't need to add up to 100! */ 1414 if (total_percent != 0) { 1415 long free_space = lp->d_secperunit - total_size; 1416 if (total_percent > 100) { 1417 fprintf(stderr,"total percentage %lu is greater than 100\n", 1418 total_percent); 1419 errors++; 1420 } 1421 1422 if (free_space > 0) { 1423 for (i = 0; i < lp->d_npartitions; i++) { 1424 pp = &lp->d_partitions[i]; 1425 if (part_set[i] && part_size_type[i] == '%') { 1426 /* careful of overflows! and integer roundoff */ 1427 pp->p_size = ((double)pp->p_size/100) * free_space; 1428 total_size += pp->p_size; 1429 1430 /* FIX we can lose a sector or so due to roundoff per 1431 partition. A more complex algorithm could avoid that */ 1432 } 1433 } 1434 } else { 1435 fprintf(stderr, 1436 "%ld sectors available to give to '*' and '%%' partitions\n", 1437 free_space); 1438 errors++; 1439 /* fix? set all % partitions to size 0? */ 1440 } 1441 } 1442 /* give anything remaining to the hog partition */ 1443 if (hog_part != -1) { 1444 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; 1445 total_size = lp->d_secperunit; 1446 } 1447 1448 /* Now set the offsets for each partition */ 1449 current_offset = 0; /* in sectors */ 1450 seen_default_offset = 0; 1451 for (i = 0; i < lp->d_npartitions; i++) { 1452 part = 'a' + i; 1453 pp = &lp->d_partitions[i]; 1454 if (part_set[i]) { 1455 if (part_offset_type[i] == '*') { 1456 if (i == RAW_PART) { 1457 pp->p_offset = 0; 1458 } else { 1459 pp->p_offset = current_offset; 1460 seen_default_offset = 1; 1461 } 1462 } else { 1463 /* allow them to be out of order for old-style tables */ 1464 if (pp->p_offset < current_offset && 1465 seen_default_offset && i != RAW_PART && 1466 pp->p_fstype != FS_VINUM) { 1467 fprintf(stderr, 1468"Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1469 (long)pp->p_offset,i+'a',current_offset); 1470 fprintf(stderr, 1471"Labels with any *'s for offset must be in ascending order by sector\n"); 1472 errors++; 1473 } else if (pp->p_offset != current_offset && 1474 i != RAW_PART && seen_default_offset) { 1475 /* 1476 * this may give unneeded warnings if 1477 * partitions are out-of-order 1478 */ 1479 Warning( 1480"Offset %ld for partition %c doesn't match expected value %ld", 1481 (long)pp->p_offset, i + 'a', current_offset); 1482 } 1483 } 1484 if (i != RAW_PART) 1485 current_offset = pp->p_offset + pp->p_size; 1486 } 1487 } 1488 1489 for (i = 0; i < lp->d_npartitions; i++) { 1490 part = 'a' + i; 1491 pp = &lp->d_partitions[i]; 1492 if (pp->p_size == 0 && pp->p_offset != 0) 1493 Warning("partition %c: size 0, but offset %lu", 1494 part, (u_long)pp->p_offset); 1495#ifdef __sparc64__ 1496 /* See comment in writelabel(). */ 1497 if (pp->p_offset % lp->d_secpercyl != 0) { 1498 fprintf(stderr, "partition %c: does not start on a " 1499 "cylinder boundary!\n", part); 1500 errors++; 1501 } 1502#endif 1503#ifdef notdef 1504 if (pp->p_size % lp->d_secpercyl) 1505 Warning("partition %c: size %% cylinder-size != 0", 1506 part); 1507 if (pp->p_offset % lp->d_secpercyl) 1508 Warning("partition %c: offset %% cylinder-size != 0", 1509 part); 1510#endif 1511 if (pp->p_offset > lp->d_secperunit) { 1512 fprintf(stderr, 1513 "partition %c: offset past end of unit\n", part); 1514 errors++; 1515 } 1516 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1517 fprintf(stderr, 1518 "partition %c: partition extends past end of unit\n", 1519 part); 1520 errors++; 1521 } 1522 if (i == RAW_PART) 1523 { 1524 if (pp->p_fstype != FS_UNUSED) 1525 Warning("partition %c is not marked as unused!",part); 1526 if (pp->p_offset != 0) 1527 Warning("partition %c doesn't start at 0!",part); 1528 if (pp->p_size != lp->d_secperunit) 1529 Warning("partition %c doesn't cover the whole unit!",part); 1530 1531 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1532 (pp->p_size != lp->d_secperunit)) { 1533 Warning("An incorrect partition %c may cause problems for " 1534 "standard system utilities",part); 1535 } 1536 } 1537 1538 /* check for overlaps */ 1539 /* this will check for all possible overlaps once and only once */ 1540 for (j = 0; j < i; j++) { 1541 pp2 = &lp->d_partitions[j]; 1542 if (j != RAW_PART && i != RAW_PART && 1543 pp->p_fstype != FS_VINUM && 1544 pp2->p_fstype != FS_VINUM && 1545 part_set[i] && part_set[j]) { 1546 if (pp2->p_offset < pp->p_offset + pp->p_size && 1547 (pp2->p_offset + pp2->p_size > pp->p_offset || 1548 pp2->p_offset >= pp->p_offset)) { 1549 fprintf(stderr,"partitions %c and %c overlap!\n", 1550 j + 'a', i + 'a'); 1551 errors++; 1552 } 1553 } 1554 } 1555 } 1556 for (; i < MAXPARTITIONS; i++) { 1557 part = 'a' + i; 1558 pp = &lp->d_partitions[i]; 1559 if (pp->p_size || pp->p_offset) 1560 Warning("unused partition %c: size %d offset %lu", 1561 'a' + i, pp->p_size, (u_long)pp->p_offset); 1562 } 1563 return (errors); 1564} 1565 1566/* 1567 * When operating on a "virgin" disk, try getting an initial label 1568 * from the associated device driver. This might work for all device 1569 * drivers that are able to fetch some initial device parameters 1570 * without even having access to a (BSD) disklabel, like SCSI disks, 1571 * most IDE drives, or vn devices. 1572 * 1573 * The device name must be given in its "canonical" form. 1574 */ 1575struct disklabel * 1576getvirginlabel(void) 1577{ 1578 static struct disklabel loclab; 1579 struct partition *dp; 1580 char lnamebuf[BBSIZE]; 1581 int f; 1582 u_int secsize, u; 1583 off_t mediasize; 1584 1585 if (dkname[0] == '/') { 1586 warnx("\"auto\" requires the usage of a canonical disk name"); 1587 return (NULL); 1588 } 1589 (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname); 1590 if ((f = open(lnamebuf, O_RDONLY)) == -1) { 1591 warn("cannot open %s", lnamebuf); 1592 return (NULL); 1593 } 1594 1595 /* New world order */ 1596 if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || 1597 (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { 1598 close (f); 1599 return (NULL); 1600 } 1601 memset(&loclab, 0, sizeof loclab); 1602 loclab.d_magic = DISKMAGIC; 1603 loclab.d_magic2 = DISKMAGIC; 1604 loclab.d_secsize = secsize; 1605 loclab.d_secperunit = mediasize / secsize; 1606 1607 /* 1608 * Nobody in these enligthened days uses the CHS geometry for 1609 * anything, but nontheless try to get it right. If we fail 1610 * to get any good ideas from the device, construct something 1611 * which is IBM-PC friendly. 1612 */ 1613 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1614 loclab.d_nsectors = u; 1615 else 1616 loclab.d_nsectors = 63; 1617 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1618 loclab.d_ntracks = u; 1619 else if (loclab.d_secperunit <= 63*1*1024) 1620 loclab.d_ntracks = 1; 1621 else if (loclab.d_secperunit <= 63*16*1024) 1622 loclab.d_ntracks = 16; 1623 else 1624 loclab.d_ntracks = 255; 1625 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1626 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1627 loclab.d_npartitions = MAXPARTITIONS; 1628 1629 /* Various (unneeded) compat stuff */ 1630 loclab.d_rpm = 3600; 1631 loclab.d_bbsize = BBSIZE; 1632 loclab.d_interleave = 1;; 1633 strncpy(loclab.d_typename, "amnesiac", 1634 sizeof(loclab.d_typename)); 1635 1636 dp = &loclab.d_partitions[RAW_PART]; 1637 dp->p_size = loclab.d_secperunit; 1638 loclab.d_checksum = dkcksum(&loclab); 1639 close (f); 1640 return (&loclab); 1641} 1642 1643/* 1644 * If we are installing a boot program that doesn't fit in d_bbsize 1645 * we need to mark those partitions that the boot overflows into. 1646 * This allows newfs to prevent creation of a file system where it might 1647 * clobber bootstrap code. 1648 */ 1649void 1650setbootflag(struct disklabel *lp) 1651{ 1652 struct partition *pp; 1653 int i, errors = 0; 1654 char part; 1655 u_long boffset; 1656 1657 if (bootbuf == 0) 1658 return; 1659 boffset = bootsize / lp->d_secsize; 1660 for (i = 0; i < lp->d_npartitions; i++) { 1661 part = 'a' + i; 1662 pp = &lp->d_partitions[i]; 1663 if (pp->p_size == 0) 1664 continue; 1665 if (boffset <= pp->p_offset) { 1666 if (pp->p_fstype == FS_BOOT) 1667 pp->p_fstype = FS_UNUSED; 1668 } else if (pp->p_fstype != FS_BOOT) { 1669 if (pp->p_fstype != FS_UNUSED) { 1670 fprintf(stderr, 1671 "boot overlaps used partition %c\n", 1672 part); 1673 errors++; 1674 } else { 1675 pp->p_fstype = FS_BOOT; 1676 Warning("boot overlaps partition %c, %s", 1677 part, "marked as FS_BOOT"); 1678 } 1679 } 1680 } 1681 if (errors) 1682 errx(4, "cannot install boot program"); 1683} 1684 1685/*VARARGS1*/ 1686void 1687Warning(const char *fmt, ...) 1688{ 1689 va_list ap; 1690 1691 fprintf(stderr, "Warning, "); 1692 va_start(ap, fmt); 1693 vfprintf(stderr, fmt, ap); 1694 fprintf(stderr, "\n"); 1695 va_end(ap); 1696} 1697 1698void 1699usage(void) 1700{ 1701#if NUMBOOT > 0 1702 fprintf(stderr, "%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%s\n%s\n", 1703 "usage: disklabel [-r] disk", 1704 "\t\t(to read label)", 1705 " disklabel -w [-r] [-n] disk type [ packid ]", 1706 "\t\t(to write label with existing boot program)", 1707 " disklabel -e [-r] [-n] disk", 1708 "\t\t(to edit label)", 1709 " disklabel -R [-r] [-n] disk protofile", 1710 "\t\t(to restore label with existing boot program)", 1711#if NUMBOOT > 1 1712 " disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]", 1713 "\t\t(to install boot program with existing label)", 1714 " disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]", 1715 "\t\t(to write label and boot program)", 1716 " disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]", 1717 "\t\t(to restore label and boot program)", 1718#else 1719 " disklabel -B [-n] [ -b bootprog ] disk [ type ]", 1720 "\t\t(to install boot program with existing on-disk label)", 1721 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]", 1722 "\t\t(to write label and install boot program)", 1723 " disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]", 1724 "\t\t(to restore label and install boot program)", 1725#endif 1726 " disklabel [-NW] disk", 1727 "\t\t(to write disable/enable label)"); 1728#else 1729 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1730 "usage: disklabel [-r] disk", "(to read label)", 1731 " disklabel -w [-r] [-n] disk type [ packid ]", 1732 "\t\t(to write label)", 1733 " disklabel -e [-r] [-n] disk", 1734 "\t\t(to edit label)", 1735 " disklabel -R [-r] [-n] disk protofile", 1736 "\t\t(to restore label)", 1737 " disklabel [-NW] disk", 1738 "\t\t(to write disable/enable label)"); 1739#endif 1740 exit(1); 1741} 1742