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 44 static 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 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 54 static const char rcsid[] = 55 "$FreeBSD$"; 56 #endif /* not lint */ 57 58 #include <sys/param.h> 59 #include <sys/file.h> 60 #include <sys/stat.h> 61 #include <sys/wait.h> 62 #define DKTYPENAMES 63 #include <sys/disklabel.h> 64 #ifdef __sparc64__ 65 #include <sys/sun_disklabel.h> 66 #endif 67 #include <ufs/ffs/fs.h> 68 #include <unistd.h> 69 #include <string.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <signal.h> 73 #include <stdarg.h> 74 #include <ctype.h> 75 #include <err.h> 76 #include <errno.h> 77 #include "pathnames.h" 78 79 /* 80 * Disklabel: read and write disklabels. 81 * The label is usually placed on one of the first sectors of the disk. 82 * Many machines also place a bootstrap in the same area, 83 * in which case the label is embedded in the bootstrap. 84 * The bootstrap source must leave space at the proper offset 85 * for the label on such machines. 86 */ 87 88 #ifndef BBSIZE 89 #define BBSIZE 8192 /* size of boot area, with label */ 90 #endif 91 92 /* FIX! These are too low, but are traditional */ 93 #define DEFAULT_NEWFS_BLOCK 8192U 94 #define DEFAULT_NEWFS_FRAG 1024U 95 #define DEFAULT_NEWFS_CPG 16U 96 97 #define BIG_NEWFS_BLOCK 16384U 98 #define BIG_NEWFS_FRAG 4096U 99 #define BIG_NEWFS_CPG 64U 100 101 #if defined(__i386__) || defined(__ia64__) 102 #define NUMBOOT 2 103 #elif defined(__alpha__) || defined(__sparc64__) 104 #define NUMBOOT 1 105 #else 106 #error I do not know about this architecture. 107 #endif 108 109 void makelabel(const char *, const char *, struct disklabel *); 110 int writelabel(int, const char *, struct disklabel *); 111 void l_perror(const char *); 112 struct disklabel *readlabel(int); 113 struct disklabel *makebootarea(char *, struct disklabel *, int); 114 void display(FILE *, const struct disklabel *); 115 int edit(struct disklabel *, int); 116 int editit(void); 117 char *skip(char *); 118 char *word(char *); 119 int getasciilabel(FILE *, struct disklabel *); 120 int checklabel(struct disklabel *); 121 void setbootflag(struct disklabel *); 122 void Warning(const char *, ...) __printflike(1, 2); 123 void usage(void); 124 struct disklabel *getvirginlabel(void); 125 126 #define DEFEDITOR _PATH_VI 127 #define streq(a,b) (strcmp(a,b) == 0) 128 129 char *dkname; 130 char *specname; 131 char tmpfil[] = PATH_TMPFILE; 132 133 char namebuf[BBSIZE], *np = namebuf; 134 struct disklabel lab; 135 char bootarea[BBSIZE]; 136 137 #define MAX_PART ('z') 138 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 139 char part_size_type[MAX_NUM_PARTS]; 140 char part_offset_type[MAX_NUM_PARTS]; 141 int part_set[MAX_NUM_PARTS]; 142 143 #if NUMBOOT > 0 144 int installboot; /* non-zero if we should install a boot program */ 145 char *bootbuf; /* pointer to buffer with remainder of boot prog */ 146 int bootsize; /* size of remaining boot program */ 147 char *xxboot; /* primary boot */ 148 char *bootxx; /* secondary boot */ 149 char boot0[MAXPATHLEN]; 150 char boot1[MAXPATHLEN]; 151 #endif 152 153 enum { 154 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT 155 } op = UNSPEC; 156 157 int rflag; 158 int disable_write; /* set to disable writing to disk label */ 159 160 #define OPTIONS "BNRWb:enrs:w" 161 162 int 163 main(int argc, char *argv[]) 164 { 165 struct disklabel *lp; 166 FILE *t; 167 int ch, f = 0, flag, error = 0; 168 char *name = 0; 169 170 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 171 switch (ch) { 172 #if NUMBOOT > 0 173 case 'B': 174 ++installboot; 175 break; 176 case 'b': 177 xxboot = optarg; 178 break; 179 #if NUMBOOT > 1 180 case 's': 181 bootxx = optarg; 182 break; 183 #endif 184 #endif 185 case 'N': 186 if (op != UNSPEC) 187 usage(); 188 op = NOWRITE; 189 break; 190 case 'n': 191 disable_write = 1; 192 break; 193 case 'R': 194 if (op != UNSPEC) 195 usage(); 196 op = RESTORE; 197 break; 198 case 'W': 199 if (op != UNSPEC) 200 usage(); 201 op = WRITEABLE; 202 break; 203 case 'e': 204 if (op != UNSPEC) 205 usage(); 206 op = EDIT; 207 break; 208 case 'r': 209 ++rflag; 210 break; 211 case 'w': 212 if (op != UNSPEC) 213 usage(); 214 op = WRITE; 215 break; 216 case '?': 217 default: 218 usage(); 219 } 220 argc -= optind; 221 argv += optind; 222 #if NUMBOOT > 0 223 if (installboot) { 224 rflag++; 225 if (op == UNSPEC) 226 op = WRITEBOOT; 227 } else { 228 if (op == UNSPEC) 229 op = READ; 230 xxboot = bootxx = 0; 231 } 232 #else 233 if (op == UNSPEC) 234 op = READ; 235 #endif 236 if (argc < 1) 237 usage(); 238 239 dkname = argv[0]; 240 if (dkname[0] != '/') { 241 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART); 242 specname = np; 243 np += strlen(specname) + 1; 244 } else 245 specname = dkname; 246 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 247 if (f < 0 && errno == ENOENT && dkname[0] != '/') { 248 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname); 249 np = namebuf + strlen(specname) + 1; 250 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 251 } 252 if (f < 0) 253 err(4, "%s", specname); 254 255 switch(op) { 256 257 case UNSPEC: 258 break; 259 260 case EDIT: 261 if (argc != 1) 262 usage(); 263 lp = readlabel(f); 264 error = edit(lp, f); 265 break; 266 267 case NOWRITE: 268 flag = 0; 269 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 270 err(4, "ioctl DIOCWLABEL"); 271 break; 272 273 case READ: 274 if (argc != 1) 275 usage(); 276 lp = readlabel(f); 277 display(stdout, lp); 278 error = checklabel(lp); 279 break; 280 281 case RESTORE: 282 #if NUMBOOT > 0 283 if (installboot && argc == 3) { 284 makelabel(argv[2], 0, &lab); 285 argc--; 286 287 /* 288 * We only called makelabel() for its side effect 289 * of setting the bootstrap file names. Discard 290 * all changes to `lab' so that all values in the 291 * final label come from the ASCII label. 292 */ 293 bzero((char *)&lab, sizeof(lab)); 294 } 295 #endif 296 if (argc != 2) 297 usage(); 298 if (!(t = fopen(argv[1], "r"))) 299 err(4, "%s", argv[1]); 300 if (!getasciilabel(t, &lab)) 301 exit(1); 302 lp = makebootarea(bootarea, &lab, f); 303 *lp = lab; 304 error = writelabel(f, bootarea, lp); 305 break; 306 307 case WRITE: 308 if (argc == 3) { 309 name = argv[2]; 310 argc--; 311 } 312 if (argc != 2) 313 usage(); 314 makelabel(argv[1], name, &lab); 315 lp = makebootarea(bootarea, &lab, f); 316 *lp = lab; 317 if (checklabel(lp) == 0) 318 error = writelabel(f, bootarea, lp); 319 break; 320 321 case WRITEABLE: 322 flag = 1; 323 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 324 err(4, "ioctl DIOCWLABEL"); 325 break; 326 327 #if NUMBOOT > 0 328 case WRITEBOOT: 329 { 330 struct disklabel tlab; 331 332 lp = readlabel(f); 333 tlab = *lp; 334 if (argc == 2) 335 makelabel(argv[1], 0, &lab); 336 lp = makebootarea(bootarea, &lab, f); 337 *lp = tlab; 338 if (checklabel(lp) == 0) 339 error = writelabel(f, bootarea, lp); 340 break; 341 } 342 #endif 343 } 344 exit(error); 345 } 346 347 /* 348 * Construct a prototype disklabel from /etc/disktab. As a side 349 * effect, set the names of the primary and secondary boot files 350 * if specified. 351 */ 352 void 353 makelabel(const char *type, const char *name, struct disklabel *lp) 354 { 355 struct disklabel *dp; 356 357 if (strcmp(type, "auto") == 0) 358 dp = getvirginlabel(); 359 else 360 dp = getdiskbyname(type); 361 if (dp == NULL) 362 errx(1, "%s: unknown disk type", type); 363 *lp = *dp; 364 bzero(lp->d_packname, sizeof(lp->d_packname)); 365 if (name) 366 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 367 } 368 369 int 370 writelabel(int f, const char *boot, struct disklabel *lp) 371 { 372 int flag; 373 #ifdef __alpha__ 374 u_long *p, sum; 375 int i; 376 #endif 377 #ifdef __sparc64__ 378 struct sun_disklabel *sl; 379 u_short cksum, *sp1, *sp2; 380 struct partition *npp; 381 struct sun_dkpart *spp; 382 int i, secpercyl; 383 #endif 384 385 if (disable_write) { 386 Warning("write to disk label supressed - label was as follows:"); 387 display(stdout, lp); 388 return (0); 389 } else { 390 setbootflag(lp); 391 lp->d_magic = DISKMAGIC; 392 lp->d_magic2 = DISKMAGIC; 393 lp->d_checksum = 0; 394 lp->d_checksum = dkcksum(lp); 395 if (rflag) { 396 /* 397 * First set the kernel disk label, 398 * then write a label to the raw disk. 399 * If the SDINFO ioctl fails because it is unimplemented, 400 * keep going; otherwise, the kernel consistency checks 401 * may prevent us from changing the current (in-core) 402 * label. 403 */ 404 if (ioctl(f, DIOCSDINFO, lp) < 0 && 405 errno != ENODEV && errno != ENOTTY) { 406 l_perror("ioctl DIOCSDINFO"); 407 return (1); 408 } 409 (void)lseek(f, (off_t)0, SEEK_SET); 410 411 #ifdef __alpha__ 412 /* 413 * Generate the bootblock checksum for the SRM console. 414 */ 415 for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++) 416 sum += p[i]; 417 p[63] = sum; 418 #endif 419 #ifdef __sparc64__ 420 /* 421 * Generate a Sun disklabel around the BSD label for 422 * PROM compatability. 423 */ 424 sl = (struct sun_disklabel *)boot; 425 memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname)); 426 sl->sl_rpm = lp->d_rpm; 427 sl->sl_pcylinders = lp->d_ncylinders + 428 lp->d_acylinders; /* XXX */ 429 sl->sl_sparespercyl = lp->d_sparespercyl; 430 sl->sl_interleave = lp->d_interleave; 431 sl->sl_ncylinders = lp->d_ncylinders; 432 sl->sl_acylinders = lp->d_acylinders; 433 sl->sl_ntracks = lp->d_ntracks; 434 sl->sl_nsectors = lp->d_nsectors; 435 sl->sl_magic = SUN_DKMAGIC; 436 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 437 for (i = 0; i < 8; i++) { 438 spp = &sl->sl_part[i]; 439 npp = &lp->d_partitions[i]; 440 /* 441 * SunOS partitions must start on a cylinder 442 * boundary. Note this restriction is forced 443 * upon FreeBSD/sparc64 labels too, since we 444 * want to keep both labels synchronised. 445 */ 446 spp->sdkp_cyloffset = npp->p_offset / secpercyl; 447 spp->sdkp_nsectors = npp->p_size; 448 } 449 450 /* Compute the XOR checksum. */ 451 sp1 = (u_short *)sl; 452 sp2 = (u_short *)(sl + 1); 453 sl->sl_cksum = cksum = 0; 454 while (sp1 < sp2) 455 cksum ^= *sp1++; 456 sl->sl_cksum = cksum; 457 #endif 458 /* 459 * write enable label sector before write (if necessary), 460 * disable after writing. 461 */ 462 flag = 1; 463 if (ioctl(f, DIOCWLABEL, &flag) < 0) 464 warn("ioctl DIOCWLABEL"); 465 if (write(f, boot, lp->d_bbsize) != lp->d_bbsize) { 466 warn("write"); 467 return (1); 468 } 469 #if NUMBOOT > 0 470 /* 471 * Output the remainder of the disklabel 472 */ 473 if (bootbuf && write(f, bootbuf, bootsize) != bootsize) { 474 warn("write"); 475 return(1); 476 } 477 #endif 478 flag = 0; 479 (void) ioctl(f, DIOCWLABEL, &flag); 480 } else if (ioctl(f, DIOCWDINFO, lp) < 0) { 481 l_perror("ioctl DIOCWDINFO"); 482 return (1); 483 } 484 } 485 return (0); 486 } 487 488 void 489 l_perror(const char *s) 490 { 491 switch (errno) { 492 493 case ESRCH: 494 warnx("%s: no disk label on disk;", s); 495 fprintf(stderr, "add \"-r\" to install initial label\n"); 496 break; 497 498 case EINVAL: 499 warnx("%s: label magic number or checksum is wrong!", s); 500 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 501 break; 502 503 case EBUSY: 504 warnx("%s: open partition would move or shrink", s); 505 break; 506 507 case EXDEV: 508 warnx("%s: '%c' partition must start at beginning of disk", 509 s, 'a' + RAW_PART); 510 break; 511 512 default: 513 warn((char *)NULL); 514 break; 515 } 516 } 517 518 /* 519 * Fetch disklabel for disk. 520 * Use ioctl to get label unless -r flag is given. 521 */ 522 struct disklabel * 523 readlabel(int f) 524 { 525 struct disklabel *lp; 526 527 if (rflag) { 528 if (read(f, bootarea, BBSIZE) < BBSIZE) 529 err(4, "%s", specname); 530 for (lp = (struct disklabel *)bootarea; 531 lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp)); 532 lp = (struct disklabel *)((char *)lp + 16)) 533 if (lp->d_magic == DISKMAGIC && 534 lp->d_magic2 == DISKMAGIC) 535 break; 536 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) || 537 lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC || 538 dkcksum(lp) != 0) 539 errx(1, 540 "bad pack magic number (label is damaged, or pack is unlabeled)"); 541 } else { 542 lp = &lab; 543 if (ioctl(f, DIOCGDINFO, lp) < 0) 544 err(4, "ioctl DIOCGDINFO"); 545 } 546 return (lp); 547 } 548 549 /* 550 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 551 * Returns a pointer to the disklabel portion of the bootarea. 552 */ 553 struct disklabel * 554 makebootarea(char *boot, struct disklabel *dp, int f) 555 { 556 struct disklabel *lp; 557 char *p; 558 int b; 559 #if NUMBOOT > 0 560 char *dkbasename; 561 struct stat sb; 562 #endif 563 #ifdef __alpha__ 564 u_long *bootinfo; 565 int n; 566 #endif 567 #ifdef __i386__ 568 char *tmpbuf; 569 int i, found; 570 #endif 571 572 /* XXX */ 573 if (dp->d_secsize == 0) { 574 dp->d_secsize = DEV_BSIZE; 575 dp->d_bbsize = BBSIZE; 576 } 577 lp = (struct disklabel *) 578 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET); 579 bzero((char *)lp, sizeof *lp); 580 #if NUMBOOT > 0 581 /* 582 * If we are not installing a boot program but we are installing a 583 * label on disk then we must read the current bootarea so we don't 584 * clobber the existing boot. 585 */ 586 if (!installboot) { 587 if (rflag) { 588 if (read(f, boot, BBSIZE) < BBSIZE) 589 err(4, "%s", specname); 590 bzero((char *)lp, sizeof *lp); 591 } 592 return (lp); 593 } 594 /* 595 * We are installing a boot program. Determine the name(s) and 596 * read them into the appropriate places in the boot area. 597 */ 598 if (!xxboot || !bootxx) { 599 dkbasename = np; 600 if ((p = rindex(dkname, '/')) == NULL) 601 p = dkname; 602 else 603 p++; 604 while (*p && !isdigit(*p)) 605 *np++ = *p++; 606 *np++ = '\0'; 607 608 if (!xxboot) { 609 (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR); 610 xxboot = boot0; 611 } 612 #if NUMBOOT > 1 613 if (!bootxx) { 614 (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR); 615 bootxx = boot1; 616 } 617 #endif 618 } 619 620 /* 621 * Strange rules: 622 * 1. One-piece bootstrap (hp300/hp800) 623 * 1. One-piece bootstrap (alpha/sparc64) 624 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest 625 * is remembered and written later following the bootarea. 626 * 2. Two-piece bootstraps (i386/ia64) 627 * up to d_secsize bytes of ``xxboot'' go in first d_secsize 628 * bytes of bootarea, remaining d_bbsize-d_secsize filled 629 * from ``bootxx''. 630 */ 631 b = open(xxboot, O_RDONLY); 632 if (b < 0) 633 err(4, "%s", xxboot); 634 #if NUMBOOT > 1 635 #ifdef __i386__ 636 /* 637 * XXX Botch alert. 638 * The i386 has the so-called fdisk table embedded into the 639 * primary bootstrap. We take care to not clobber it, but 640 * only if it does already contain some data. (Otherwise, 641 * the xxboot provides a template.) 642 */ 643 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) 644 err(4, "%s", xxboot); 645 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 646 #endif /* i386 */ 647 if (read(b, boot, (int)dp->d_secsize) < 0) 648 err(4, "%s", xxboot); 649 (void)close(b); 650 #ifdef __i386__ 651 for (i = DOSPARTOFF, found = 0; 652 !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition); 653 i++) 654 found = tmpbuf[i] != 0; 655 if (found) 656 memcpy((void *)&boot[DOSPARTOFF], 657 (void *)&tmpbuf[DOSPARTOFF], 658 NDOSPART * sizeof(struct dos_partition)); 659 free(tmpbuf); 660 #endif /* i386 */ 661 b = open(bootxx, O_RDONLY); 662 if (b < 0) 663 err(4, "%s", bootxx); 664 if (fstat(b, &sb) != 0) 665 err(4, "%s", bootxx); 666 if (dp->d_secsize + sb.st_size > dp->d_bbsize) 667 errx(4, "%s too large", bootxx); 668 if (read(b, &boot[dp->d_secsize], 669 (int)(dp->d_bbsize-dp->d_secsize)) < 0) 670 err(4, "%s", bootxx); 671 #else /* !(NUMBOOT > 1) */ 672 #ifdef __alpha__ 673 /* 674 * On the alpha, the primary bootstrap starts at the 675 * second sector of the boot area. The first sector 676 * contains the label and must be edited to contain the 677 * size and location of the primary bootstrap. 678 */ 679 n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize); 680 if (n < 0) 681 err(4, "%s", xxboot); 682 bootinfo = (u_long *)(boot + 480); 683 bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize; 684 bootinfo[1] = 1; /* start at sector 1 */ 685 bootinfo[2] = 0; /* flags (must be zero) */ 686 #else /* !__alpha__ */ 687 if (read(b, boot, (int)dp->d_bbsize) < 0) 688 err(4, "%s", xxboot); 689 #endif /* __alpha__ */ 690 if (fstat(b, &sb) != 0) 691 err(4, "%s", xxboot); 692 bootsize = (int)sb.st_size - dp->d_bbsize; 693 if (bootsize > 0) { 694 /* XXX assume d_secsize is a power of two */ 695 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1); 696 bootbuf = (char *)malloc((size_t)bootsize); 697 if (bootbuf == 0) 698 err(4, "%s", xxboot); 699 if (read(b, bootbuf, bootsize) < 0) { 700 free(bootbuf); 701 err(4, "%s", xxboot); 702 } 703 } 704 #endif /* NUMBOOT > 1 */ 705 (void)close(b); 706 #endif /* NUMBOOT > 0 */ 707 /* 708 * Make sure no part of the bootstrap is written in the area 709 * reserved for the label. 710 */ 711 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++) 712 if (*p) 713 errx(2, "bootstrap doesn't leave room for disk label"); 714 return (lp); 715 } 716 717 void 718 display(FILE *f, const struct disklabel *lp) 719 { 720 int i, j; 721 const struct partition *pp; 722 723 fprintf(f, "# %s:\n", specname); 724 if ((unsigned) lp->d_type < DKMAXTYPES) 725 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 726 else 727 fprintf(f, "type: %u\n", lp->d_type); 728 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 729 lp->d_typename); 730 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 731 lp->d_packname); 732 fprintf(f, "flags:"); 733 if (lp->d_flags & D_REMOVABLE) 734 fprintf(f, " removeable"); 735 if (lp->d_flags & D_ECC) 736 fprintf(f, " ecc"); 737 if (lp->d_flags & D_BADSECT) 738 fprintf(f, " badsect"); 739 fprintf(f, "\n"); 740 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 741 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 742 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 743 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 744 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 745 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 746 fprintf(f, "rpm: %u\n", lp->d_rpm); 747 fprintf(f, "interleave: %u\n", lp->d_interleave); 748 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 749 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 750 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 751 (u_long)lp->d_headswitch); 752 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 753 (u_long)lp->d_trkseek); 754 fprintf(f, "drivedata: "); 755 for (i = NDDATA - 1; i >= 0; i--) 756 if (lp->d_drivedata[i]) 757 break; 758 if (i < 0) 759 i = 0; 760 for (j = 0; j <= i; j++) 761 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 762 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 763 fprintf(f, 764 "# size offset fstype [fsize bsize bps/cpg]\n"); 765 pp = lp->d_partitions; 766 for (i = 0; i < lp->d_npartitions; i++, pp++) { 767 if (pp->p_size) { 768 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 769 (u_long)pp->p_size, (u_long)pp->p_offset); 770 if ((unsigned) pp->p_fstype < FSMAXTYPES) 771 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 772 else 773 fprintf(f, "%8d", pp->p_fstype); 774 switch (pp->p_fstype) { 775 776 case FS_UNUSED: /* XXX */ 777 fprintf(f, " %5lu %5lu %5.5s ", 778 (u_long)pp->p_fsize, 779 (u_long)(pp->p_fsize * pp->p_frag), ""); 780 break; 781 782 case FS_BSDFFS: 783 fprintf(f, " %5lu %5lu %5u ", 784 (u_long)pp->p_fsize, 785 (u_long)(pp->p_fsize * pp->p_frag), 786 pp->p_cpg); 787 break; 788 789 case FS_BSDLFS: 790 fprintf(f, " %5lu %5lu %5d", 791 (u_long)pp->p_fsize, 792 (u_long)(pp->p_fsize * pp->p_frag), 793 pp->p_cpg); 794 break; 795 796 default: 797 fprintf(f, "%20.20s", ""); 798 break; 799 } 800 fprintf(f, "\t# (Cyl. %4lu", 801 (u_long)(pp->p_offset / lp->d_secpercyl)); 802 if (pp->p_offset % lp->d_secpercyl) 803 putc('*', f); 804 else 805 putc(' ', f); 806 fprintf(f, "- %lu", 807 (u_long)((pp->p_offset + pp->p_size + 808 lp->d_secpercyl - 1) / 809 lp->d_secpercyl - 1)); 810 if (pp->p_size % lp->d_secpercyl) 811 putc('*', f); 812 fprintf(f, ")\n"); 813 } 814 } 815 fflush(f); 816 } 817 818 int 819 edit(struct disklabel *lp, int f) 820 { 821 int c, fd; 822 struct disklabel label; 823 FILE *fp; 824 825 if ((fd = mkstemp(tmpfil)) == -1 || 826 (fp = fdopen(fd, "w")) == NULL) { 827 warnx("can't create %s", tmpfil); 828 return (1); 829 } 830 display(fp, lp); 831 fclose(fp); 832 for (;;) { 833 if (!editit()) 834 break; 835 fp = fopen(tmpfil, "r"); 836 if (fp == NULL) { 837 warnx("can't reopen %s for reading", tmpfil); 838 break; 839 } 840 bzero((char *)&label, sizeof(label)); 841 if (getasciilabel(fp, &label)) { 842 *lp = label; 843 if (writelabel(f, bootarea, lp) == 0) { 844 fclose(fp); 845 (void) unlink(tmpfil); 846 return (0); 847 } 848 } 849 fclose(fp); 850 printf("re-edit the label? [y]: "); fflush(stdout); 851 c = getchar(); 852 if (c != EOF && c != (int)'\n') 853 while (getchar() != (int)'\n') 854 ; 855 if (c == (int)'n') 856 break; 857 } 858 (void) unlink(tmpfil); 859 return (1); 860 } 861 862 int 863 editit(void) 864 { 865 int pid, xpid; 866 int stat, omask; 867 char *ed; 868 869 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 870 while ((pid = fork()) < 0) { 871 if (errno == EPROCLIM) { 872 warnx("you have too many processes"); 873 return(0); 874 } 875 if (errno != EAGAIN) { 876 warn("fork"); 877 return(0); 878 } 879 sleep(1); 880 } 881 if (pid == 0) { 882 sigsetmask(omask); 883 setgid(getgid()); 884 setuid(getuid()); 885 if ((ed = getenv("EDITOR")) == (char *)0) 886 ed = DEFEDITOR; 887 execlp(ed, ed, tmpfil, (char *)0); 888 err(1, "%s", ed); 889 } 890 while ((xpid = wait(&stat)) >= 0) 891 if (xpid == pid) 892 break; 893 sigsetmask(omask); 894 return(!stat); 895 } 896 897 char * 898 skip(char *cp) 899 { 900 901 while (*cp != '\0' && isspace(*cp)) 902 cp++; 903 if (*cp == '\0' || *cp == '#') 904 return (NULL); 905 return (cp); 906 } 907 908 char * 909 word(char *cp) 910 { 911 char c; 912 913 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 914 cp++; 915 if ((c = *cp) != '\0') { 916 *cp++ = '\0'; 917 if (c != '#') 918 return (skip(cp)); 919 } 920 return (NULL); 921 } 922 923 /* 924 * Read an ascii label in from fd f, 925 * in the same format as that put out by display(), 926 * and fill in lp. 927 */ 928 int 929 getasciilabel(FILE *f, struct disklabel *lp) 930 { 931 char *cp; 932 const char **cpp; 933 struct partition *pp; 934 unsigned int part; 935 char *tp, line[BUFSIZ]; 936 int v, lineno = 0, errors = 0; 937 int i; 938 939 lp->d_bbsize = BBSIZE; /* XXX */ 940 lp->d_sbsize = SBSIZE; /* XXX */ 941 while (fgets(line, sizeof(line) - 1, f)) { 942 lineno++; 943 if ((cp = index(line,'\n')) != 0) 944 *cp = '\0'; 945 cp = skip(line); 946 if (cp == NULL) 947 continue; 948 tp = index(cp, ':'); 949 if (tp == NULL) { 950 fprintf(stderr, "line %d: syntax error\n", lineno); 951 errors++; 952 continue; 953 } 954 *tp++ = '\0', tp = skip(tp); 955 if (streq(cp, "type")) { 956 if (tp == NULL) 957 tp = "unknown"; 958 cpp = dktypenames; 959 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 960 if (*cpp && streq(*cpp, tp)) { 961 lp->d_type = cpp - dktypenames; 962 goto next; 963 } 964 v = atoi(tp); 965 if ((unsigned)v >= DKMAXTYPES) 966 fprintf(stderr, "line %d:%s %d\n", lineno, 967 "Warning, unknown disk type", v); 968 lp->d_type = v; 969 continue; 970 } 971 if (streq(cp, "flags")) { 972 for (v = 0; (cp = tp) && *cp != '\0';) { 973 tp = word(cp); 974 if (streq(cp, "removeable")) 975 v |= D_REMOVABLE; 976 else if (streq(cp, "ecc")) 977 v |= D_ECC; 978 else if (streq(cp, "badsect")) 979 v |= D_BADSECT; 980 else { 981 fprintf(stderr, 982 "line %d: %s: bad flag\n", 983 lineno, cp); 984 errors++; 985 } 986 } 987 lp->d_flags = v; 988 continue; 989 } 990 if (streq(cp, "drivedata")) { 991 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 992 lp->d_drivedata[i++] = atoi(cp); 993 tp = word(cp); 994 } 995 continue; 996 } 997 if (sscanf(cp, "%d partitions", &v) == 1) { 998 if (v == 0 || (unsigned)v > MAXPARTITIONS) { 999 fprintf(stderr, 1000 "line %d: bad # of partitions\n", lineno); 1001 lp->d_npartitions = MAXPARTITIONS; 1002 errors++; 1003 } else 1004 lp->d_npartitions = v; 1005 continue; 1006 } 1007 if (tp == NULL) 1008 tp = ""; 1009 if (streq(cp, "disk")) { 1010 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 1011 continue; 1012 } 1013 if (streq(cp, "label")) { 1014 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 1015 continue; 1016 } 1017 if (streq(cp, "bytes/sector")) { 1018 v = atoi(tp); 1019 if (v <= 0 || (v % DEV_BSIZE) != 0) { 1020 fprintf(stderr, 1021 "line %d: %s: bad sector size\n", 1022 lineno, tp); 1023 errors++; 1024 } else 1025 lp->d_secsize = v; 1026 continue; 1027 } 1028 if (streq(cp, "sectors/track")) { 1029 v = atoi(tp); 1030 if (v <= 0) { 1031 fprintf(stderr, "line %d: %s: bad %s\n", 1032 lineno, tp, cp); 1033 errors++; 1034 } else 1035 lp->d_nsectors = v; 1036 continue; 1037 } 1038 if (streq(cp, "sectors/cylinder")) { 1039 v = atoi(tp); 1040 if (v <= 0) { 1041 fprintf(stderr, "line %d: %s: bad %s\n", 1042 lineno, tp, cp); 1043 errors++; 1044 } else 1045 lp->d_secpercyl = v; 1046 continue; 1047 } 1048 if (streq(cp, "tracks/cylinder")) { 1049 v = atoi(tp); 1050 if (v <= 0) { 1051 fprintf(stderr, "line %d: %s: bad %s\n", 1052 lineno, tp, cp); 1053 errors++; 1054 } else 1055 lp->d_ntracks = v; 1056 continue; 1057 } 1058 if (streq(cp, "cylinders")) { 1059 v = atoi(tp); 1060 if (v <= 0) { 1061 fprintf(stderr, "line %d: %s: bad %s\n", 1062 lineno, tp, cp); 1063 errors++; 1064 } else 1065 lp->d_ncylinders = v; 1066 continue; 1067 } 1068 if (streq(cp, "sectors/unit")) { 1069 v = atoi(tp); 1070 if (v <= 0) { 1071 fprintf(stderr, "line %d: %s: bad %s\n", 1072 lineno, tp, cp); 1073 errors++; 1074 } else 1075 lp->d_secperunit = v; 1076 continue; 1077 } 1078 if (streq(cp, "rpm")) { 1079 v = atoi(tp); 1080 if (v <= 0) { 1081 fprintf(stderr, "line %d: %s: bad %s\n", 1082 lineno, tp, cp); 1083 errors++; 1084 } else 1085 lp->d_rpm = v; 1086 continue; 1087 } 1088 if (streq(cp, "interleave")) { 1089 v = atoi(tp); 1090 if (v <= 0) { 1091 fprintf(stderr, "line %d: %s: bad %s\n", 1092 lineno, tp, cp); 1093 errors++; 1094 } else 1095 lp->d_interleave = v; 1096 continue; 1097 } 1098 if (streq(cp, "trackskew")) { 1099 v = atoi(tp); 1100 if (v < 0) { 1101 fprintf(stderr, "line %d: %s: bad %s\n", 1102 lineno, tp, cp); 1103 errors++; 1104 } else 1105 lp->d_trackskew = v; 1106 continue; 1107 } 1108 if (streq(cp, "cylinderskew")) { 1109 v = atoi(tp); 1110 if (v < 0) { 1111 fprintf(stderr, "line %d: %s: bad %s\n", 1112 lineno, tp, cp); 1113 errors++; 1114 } else 1115 lp->d_cylskew = v; 1116 continue; 1117 } 1118 if (streq(cp, "headswitch")) { 1119 v = atoi(tp); 1120 if (v < 0) { 1121 fprintf(stderr, "line %d: %s: bad %s\n", 1122 lineno, tp, cp); 1123 errors++; 1124 } else 1125 lp->d_headswitch = v; 1126 continue; 1127 } 1128 if (streq(cp, "track-to-track seek")) { 1129 v = atoi(tp); 1130 if (v < 0) { 1131 fprintf(stderr, "line %d: %s: bad %s\n", 1132 lineno, tp, cp); 1133 errors++; 1134 } else 1135 lp->d_trkseek = v; 1136 continue; 1137 } 1138 /* the ':' was removed above */ 1139 if ('a' <= *cp && *cp <= MAX_PART && cp[1] == '\0') { 1140 part = *cp - 'a'; 1141 if (part >= lp->d_npartitions) { 1142 fprintf(stderr, 1143 "line %d: partition name out of range a-%c: %s\n", 1144 lineno, 'a' + lp->d_npartitions - 1, cp); 1145 errors++; 1146 continue; 1147 } 1148 pp = &lp->d_partitions[part]; 1149 part_set[part] = 1; 1150 #define NXTNUM(n) { \ 1151 if (tp == NULL) { \ 1152 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1153 errors++; \ 1154 break; \ 1155 } else { \ 1156 cp = tp, tp = word(cp); \ 1157 if (tp == NULL) \ 1158 tp = cp; \ 1159 (n) = atoi(cp); \ 1160 } \ 1161 } 1162 /* retain 1 character following number */ 1163 #define NXTWORD(w,n) { \ 1164 if (tp == NULL) { \ 1165 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1166 errors++; \ 1167 break; \ 1168 } else { \ 1169 char *tmp; \ 1170 cp = tp, tp = word(cp); \ 1171 if (tp == NULL) \ 1172 tp = cp; \ 1173 (n) = strtol(cp,&tmp,10); \ 1174 if (tmp) (w) = *tmp; \ 1175 } \ 1176 } 1177 v = 0; 1178 NXTWORD(part_size_type[part],v); 1179 if (v < 0 || (v == 0 && part_size_type[part] != '*')) { 1180 fprintf(stderr, 1181 "line %d: %s: bad partition size\n", 1182 lineno, cp); 1183 errors++; 1184 break; 1185 } else { 1186 pp->p_size = v; 1187 1188 v = 0; 1189 NXTWORD(part_offset_type[part],v); 1190 if (v < 0 || (v == 0 && 1191 part_offset_type[part] != '*' && 1192 part_offset_type[part] != '\0')) { 1193 fprintf(stderr, 1194 "line %d: %s: bad partition offset\n", 1195 lineno, cp); 1196 errors++; 1197 break; 1198 } else { 1199 pp->p_offset = v; 1200 cp = tp, tp = word(cp); 1201 cpp = fstypenames; 1202 for (; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1203 if (*cpp && streq(*cpp, cp)) { 1204 pp->p_fstype = cpp - 1205 fstypenames; 1206 goto gottype; 1207 } 1208 if (isdigit(*cp)) 1209 v = atoi(cp); 1210 else 1211 v = FSMAXTYPES; 1212 if ((unsigned)v >= FSMAXTYPES) { 1213 fprintf(stderr, 1214 "line %d: Warning, unknown " 1215 "filesystem type %s\n", 1216 lineno, cp); 1217 v = FS_UNUSED; 1218 } 1219 pp->p_fstype = v; 1220 gottype:; 1221 /* 1222 * Note: NXTNUM will break us out of the 1223 * switch only! 1224 */ 1225 switch (pp->p_fstype) { 1226 case FS_UNUSED: 1227 /* 1228 * allow us to accept defaults for 1229 * fsize/frag/cpg 1230 */ 1231 if (tp) { 1232 NXTNUM(pp->p_fsize); 1233 if (pp->p_fsize == 0) 1234 break; 1235 NXTNUM(v); 1236 pp->p_frag = v / pp->p_fsize; 1237 } 1238 /* else default to 0's */ 1239 break; 1240 1241 /* These happen to be the same */ 1242 case FS_BSDFFS: 1243 case FS_BSDLFS: 1244 if (tp) { 1245 NXTNUM(pp->p_fsize); 1246 if (pp->p_fsize == 0) 1247 break; 1248 NXTNUM(v); 1249 pp->p_frag = v / pp->p_fsize; 1250 NXTNUM(pp->p_cpg); 1251 } else { 1252 /* 1253 * FIX! poor attempt at 1254 * adaptive 1255 */ 1256 /* 1 GB */ 1257 if (pp->p_size < 1*1024*1024*1024/lp->d_secsize) { 1258 /* FIX! These are too low, but are traditional */ 1259 pp->p_fsize = DEFAULT_NEWFS_BLOCK; 1260 pp->p_frag = (unsigned char) DEFAULT_NEWFS_FRAG; 1261 pp->p_cpg = DEFAULT_NEWFS_CPG; 1262 } else { 1263 pp->p_fsize = BIG_NEWFS_BLOCK; 1264 pp->p_frag = (unsigned char) BIG_NEWFS_FRAG; 1265 pp->p_cpg = BIG_NEWFS_CPG; 1266 } 1267 } 1268 break; 1269 default: 1270 break; 1271 } 1272 1273 /* 1274 * note: we may not have 1275 * gotten all the entries for 1276 * the fs though if we didn't, 1277 * errors will be set. 1278 */ 1279 } 1280 } 1281 continue; 1282 } 1283 fprintf(stderr, "line %d: %s: Unknown disklabel field\n", 1284 lineno, cp); 1285 errors++; 1286 next:; 1287 } 1288 errors += checklabel(lp); 1289 return (errors == 0); 1290 } 1291 1292 /* 1293 * Check disklabel for errors and fill in 1294 * derived fields according to supplied values. 1295 */ 1296 int 1297 checklabel(struct disklabel *lp) 1298 { 1299 struct partition *pp; 1300 int i, errors = 0; 1301 char part; 1302 unsigned long total_size, total_percent, current_offset; 1303 int seen_default_offset; 1304 int hog_part; 1305 int j; 1306 struct partition *pp2; 1307 1308 if (lp->d_secsize == 0) { 1309 fprintf(stderr, "sector size 0\n"); 1310 return (1); 1311 } 1312 if (lp->d_nsectors == 0) { 1313 fprintf(stderr, "sectors/track 0\n"); 1314 return (1); 1315 } 1316 if (lp->d_ntracks == 0) { 1317 fprintf(stderr, "tracks/cylinder 0\n"); 1318 return (1); 1319 } 1320 if (lp->d_ncylinders == 0) { 1321 fprintf(stderr, "cylinders/unit 0\n"); 1322 errors++; 1323 } 1324 if (lp->d_rpm == 0) 1325 Warning("revolutions/minute 0"); 1326 if (lp->d_secpercyl == 0) 1327 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1328 if (lp->d_secperunit == 0) 1329 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1330 if (lp->d_bbsize == 0) { 1331 fprintf(stderr, "boot block size 0\n"); 1332 errors++; 1333 } else if (lp->d_bbsize % lp->d_secsize) 1334 Warning("boot block size %% sector-size != 0"); 1335 if (lp->d_sbsize == 0) { 1336 fprintf(stderr, "super block size 0\n"); 1337 errors++; 1338 } else if (lp->d_sbsize % lp->d_secsize) 1339 Warning("super block size %% sector-size != 0"); 1340 if (lp->d_npartitions > MAXPARTITIONS) 1341 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", 1342 (u_long)lp->d_npartitions, MAXPARTITIONS); 1343 1344 /* first allocate space to the partitions, then offsets */ 1345 total_size = 0; /* in sectors */ 1346 total_percent = 0; /* in percent */ 1347 hog_part = -1; 1348 /* find all fixed partitions */ 1349 for (i = 0; i < lp->d_npartitions; i++) { 1350 pp = &lp->d_partitions[i]; 1351 if (part_set[i]) { 1352 if (part_size_type[i] == '*') { 1353 if (i == RAW_PART) { 1354 pp->p_size = lp->d_secperunit; 1355 } else { 1356 if (hog_part != -1) 1357 Warning("Too many '*' partitions (%c and %c)", 1358 hog_part + 'a',i + 'a'); 1359 else 1360 hog_part = i; 1361 } 1362 } else { 1363 off_t size; 1364 1365 size = pp->p_size; 1366 switch (part_size_type[i]) { 1367 case '%': 1368 total_percent += size; 1369 break; 1370 case 'k': 1371 case 'K': 1372 size *= 1024ULL; 1373 break; 1374 case 'm': 1375 case 'M': 1376 size *= 1024ULL * 1024ULL; 1377 break; 1378 case 'g': 1379 case 'G': 1380 size *= 1024ULL * 1024ULL * 1024ULL; 1381 break; 1382 case '\0': 1383 break; 1384 default: 1385 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1386 break; 1387 } 1388 /* don't count %'s yet */ 1389 if (part_size_type[i] != '%') { 1390 /* 1391 * for all not in sectors, convert to 1392 * sectors 1393 */ 1394 if (part_size_type[i] != '\0') { 1395 if (size % lp->d_secsize != 0) 1396 Warning("partition %c not an integer number of sectors", 1397 i + 'a'); 1398 size /= lp->d_secsize; 1399 pp->p_size = size; 1400 } 1401 /* else already in sectors */ 1402 if (i != RAW_PART) 1403 total_size += size; 1404 } 1405 } 1406 } 1407 } 1408 /* handle % partitions - note %'s don't need to add up to 100! */ 1409 if (total_percent != 0) { 1410 long free_space = lp->d_secperunit - total_size; 1411 if (total_percent > 100) { 1412 fprintf(stderr,"total percentage %lu is greater than 100\n", 1413 total_percent); 1414 errors++; 1415 } 1416 1417 if (free_space > 0) { 1418 for (i = 0; i < lp->d_npartitions; i++) { 1419 pp = &lp->d_partitions[i]; 1420 if (part_set[i] && part_size_type[i] == '%') { 1421 /* careful of overflows! and integer roundoff */ 1422 pp->p_size = ((double)pp->p_size/100) * free_space; 1423 total_size += pp->p_size; 1424 1425 /* FIX we can lose a sector or so due to roundoff per 1426 partition. A more complex algorithm could avoid that */ 1427 } 1428 } 1429 } else { 1430 fprintf(stderr, 1431 "%ld sectors available to give to '*' and '%%' partitions\n", 1432 free_space); 1433 errors++; 1434 /* fix? set all % partitions to size 0? */ 1435 } 1436 } 1437 /* give anything remaining to the hog partition */ 1438 if (hog_part != -1) { 1439 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; 1440 total_size = lp->d_secperunit; 1441 } 1442 1443 /* Now set the offsets for each partition */ 1444 current_offset = 0; /* in sectors */ 1445 seen_default_offset = 0; 1446 for (i = 0; i < lp->d_npartitions; i++) { 1447 part = 'a' + i; 1448 pp = &lp->d_partitions[i]; 1449 if (part_set[i]) { 1450 if (part_offset_type[i] == '*') { 1451 if (i == RAW_PART) { 1452 pp->p_offset = 0; 1453 } else { 1454 pp->p_offset = current_offset; 1455 seen_default_offset = 1; 1456 } 1457 } else { 1458 /* allow them to be out of order for old-style tables */ 1459 if (pp->p_offset < current_offset && 1460 seen_default_offset && i != RAW_PART) { 1461 fprintf(stderr, 1462 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1463 (long)pp->p_offset,i+'a',current_offset); 1464 fprintf(stderr, 1465 "Labels with any *'s for offset must be in ascending order by sector\n"); 1466 errors++; 1467 } else if (pp->p_offset != current_offset && 1468 i != RAW_PART && seen_default_offset) { 1469 /* 1470 * this may give unneeded warnings if 1471 * partitions are out-of-order 1472 */ 1473 Warning( 1474 "Offset %ld for partition %c doesn't match expected value %ld", 1475 (long)pp->p_offset, i + 'a', current_offset); 1476 } 1477 } 1478 if (i != RAW_PART) 1479 current_offset = pp->p_offset + pp->p_size; 1480 } 1481 } 1482 1483 for (i = 0; i < lp->d_npartitions; i++) { 1484 part = 'a' + i; 1485 pp = &lp->d_partitions[i]; 1486 if (pp->p_size == 0 && pp->p_offset != 0) 1487 Warning("partition %c: size 0, but offset %lu", 1488 part, (u_long)pp->p_offset); 1489 #ifdef __sparc64__ 1490 /* See comment in writelabel(). */ 1491 if (pp->p_offset % lp->d_secpercyl != 0) { 1492 fprintf(stderr, "partition %c: does not start on a " 1493 "cylinder boundary!\n", part); 1494 errors++; 1495 } 1496 #endif 1497 #ifdef notdef 1498 if (pp->p_size % lp->d_secpercyl) 1499 Warning("partition %c: size %% cylinder-size != 0", 1500 part); 1501 if (pp->p_offset % lp->d_secpercyl) 1502 Warning("partition %c: offset %% cylinder-size != 0", 1503 part); 1504 #endif 1505 if (pp->p_offset > lp->d_secperunit) { 1506 fprintf(stderr, 1507 "partition %c: offset past end of unit\n", part); 1508 errors++; 1509 } 1510 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1511 fprintf(stderr, 1512 "partition %c: partition extends past end of unit\n", 1513 part); 1514 errors++; 1515 } 1516 if (i == RAW_PART) 1517 { 1518 if (pp->p_fstype != FS_UNUSED) 1519 Warning("partition %c is not marked as unused!",part); 1520 if (pp->p_offset != 0) 1521 Warning("partition %c doesn't start at 0!",part); 1522 if (pp->p_size != lp->d_secperunit) 1523 Warning("partition %c doesn't cover the whole unit!",part); 1524 1525 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1526 (pp->p_size != lp->d_secperunit)) { 1527 Warning("An incorrect partition %c may cause problems for " 1528 "standard system utilities",part); 1529 } 1530 } 1531 1532 /* check for overlaps */ 1533 /* this will check for all possible overlaps once and only once */ 1534 for (j = 0; j < i; j++) { 1535 if (j != RAW_PART && i != RAW_PART && 1536 part_set[i] && part_set[j]) { 1537 pp2 = &lp->d_partitions[j]; 1538 if (pp2->p_offset < pp->p_offset + pp->p_size && 1539 (pp2->p_offset + pp2->p_size > pp->p_offset || 1540 pp2->p_offset >= pp->p_offset)) { 1541 fprintf(stderr,"partitions %c and %c overlap!\n", 1542 j + 'a', i + 'a'); 1543 errors++; 1544 } 1545 } 1546 } 1547 } 1548 for (; i < MAXPARTITIONS; i++) { 1549 part = 'a' + i; 1550 pp = &lp->d_partitions[i]; 1551 if (pp->p_size || pp->p_offset) 1552 Warning("unused partition %c: size %d offset %lu", 1553 'a' + i, pp->p_size, (u_long)pp->p_offset); 1554 } 1555 return (errors); 1556 } 1557 1558 /* 1559 * When operating on a "virgin" disk, try getting an initial label 1560 * from the associated device driver. This might work for all device 1561 * drivers that are able to fetch some initial device parameters 1562 * without even having access to a (BSD) disklabel, like SCSI disks, 1563 * most IDE drives, or vn devices. 1564 * 1565 * The device name must be given in its "canonical" form. 1566 */ 1567 struct disklabel * 1568 getvirginlabel(void) 1569 { 1570 static struct disklabel lab; 1571 char namebuf[BBSIZE]; 1572 int f; 1573 1574 if (dkname[0] == '/') { 1575 warnx("\"auto\" requires the usage of a canonical disk name"); 1576 return (NULL); 1577 } 1578 (void)snprintf(namebuf, BBSIZE, "%s%s", _PATH_DEV, dkname); 1579 if ((f = open(namebuf, O_RDONLY)) == -1) { 1580 warn("cannot open %s", namebuf); 1581 return (NULL); 1582 } 1583 1584 /* 1585 * Try to use the new get-virgin-label ioctl. If it fails, 1586 * fallback to the old get-disdk-info ioctl. 1587 */ 1588 if (ioctl(f, DIOCGDVIRGIN, &lab) == 0) 1589 goto out; 1590 if (ioctl(f, DIOCGDINFO, &lab) == 0) 1591 goto out; 1592 close(f); 1593 (void)snprintf(namebuf, BBSIZE, "%s%s%c", _PATH_DEV, dkname, 1594 'a' + RAW_PART); 1595 if ((f = open(namebuf, O_RDONLY)) == -1) { 1596 warn("cannot open %s", namebuf); 1597 return (NULL); 1598 } 1599 if (ioctl(f, DIOCGDINFO, &lab) == 0) 1600 goto out; 1601 close(f); 1602 warn("No virgin disklabel found %s", namebuf); 1603 return (NULL); 1604 out: 1605 close(f); 1606 return (&lab); 1607 } 1608 1609 /* 1610 * If we are installing a boot program that doesn't fit in d_bbsize 1611 * we need to mark those partitions that the boot overflows into. 1612 * This allows newfs to prevent creation of a filesystem where it might 1613 * clobber bootstrap code. 1614 */ 1615 void 1616 setbootflag(struct disklabel *lp) 1617 { 1618 struct partition *pp; 1619 int i, errors = 0; 1620 char part; 1621 u_long boffset; 1622 1623 if (bootbuf == 0) 1624 return; 1625 boffset = bootsize / lp->d_secsize; 1626 for (i = 0; i < lp->d_npartitions; i++) { 1627 part = 'a' + i; 1628 pp = &lp->d_partitions[i]; 1629 if (pp->p_size == 0) 1630 continue; 1631 if (boffset <= pp->p_offset) { 1632 if (pp->p_fstype == FS_BOOT) 1633 pp->p_fstype = FS_UNUSED; 1634 } else if (pp->p_fstype != FS_BOOT) { 1635 if (pp->p_fstype != FS_UNUSED) { 1636 fprintf(stderr, 1637 "boot overlaps used partition %c\n", 1638 part); 1639 errors++; 1640 } else { 1641 pp->p_fstype = FS_BOOT; 1642 Warning("boot overlaps partition %c, %s", 1643 part, "marked as FS_BOOT"); 1644 } 1645 } 1646 } 1647 if (errors) 1648 errx(4, "cannot install boot program"); 1649 } 1650 1651 /*VARARGS1*/ 1652 void 1653 Warning(const char *fmt, ...) 1654 { 1655 va_list ap; 1656 1657 fprintf(stderr, "Warning, "); 1658 va_start(ap, fmt); 1659 vfprintf(stderr, fmt, ap); 1660 fprintf(stderr, "\n"); 1661 va_end(ap); 1662 } 1663 1664 void 1665 usage(void) 1666 { 1667 #if NUMBOOT > 0 1668 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", 1669 "usage: disklabel [-r] disk", 1670 "\t\t(to read label)", 1671 " disklabel -w [-r] [-n] disk type [ packid ]", 1672 "\t\t(to write label with existing boot program)", 1673 " disklabel -e [-r] [-n] disk", 1674 "\t\t(to edit label)", 1675 " disklabel -R [-r] [-n] disk protofile", 1676 "\t\t(to restore label with existing boot program)", 1677 #if NUMBOOT > 1 1678 " disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]", 1679 "\t\t(to install boot program with existing label)", 1680 " disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]", 1681 "\t\t(to write label and boot program)", 1682 " disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]", 1683 "\t\t(to restore label and boot program)", 1684 #else 1685 " disklabel -B [-n] [ -b bootprog ] disk [ type ]", 1686 "\t\t(to install boot program with existing on-disk label)", 1687 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]", 1688 "\t\t(to write label and install boot program)", 1689 " disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]", 1690 "\t\t(to restore label and install boot program)", 1691 #endif 1692 " disklabel [-NW] disk", 1693 "\t\t(to write disable/enable label)"); 1694 #else 1695 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1696 "usage: disklabel [-r] disk", "(to read label)", 1697 " disklabel -w [-r] [-n] disk type [ packid ]", 1698 "\t\t(to write label)", 1699 " disklabel -e [-r] [-n] disk", 1700 "\t\t(to edit label)", 1701 " disklabel -R [-r] [-n] disk protofile", 1702 "\t\t(to restore label)", 1703 " disklabel [-NW] disk", 1704 "\t\t(to write disable/enable label)"); 1705 #endif 1706 exit(1); 1707 } 1708