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 #endif /* not lint */ 55 56 #include <sys/cdefs.h> 57 __FBSDID("$FreeBSD$"); 58 59 #include <sys/param.h> 60 #include <sys/file.h> 61 #include <sys/stat.h> 62 #include <sys/wait.h> 63 #define DKTYPENAMES 64 #define FSTYPENAMES 65 #include <sys/disklabel.h> 66 #ifdef __sparc64__ 67 #include <sys/sun_disklabel.h> 68 #endif 69 70 #include <unistd.h> 71 #include <string.h> 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <signal.h> 75 #include <stdarg.h> 76 #include <ctype.h> 77 #include <err.h> 78 #include <errno.h> 79 80 #include "pathnames.h" 81 82 /* 83 * Disklabel: read and write disklabels. 84 * The label is usually placed on one of the first sectors of the disk. 85 * Many machines also place a bootstrap in the same area, 86 * in which case the label is embedded in the bootstrap. 87 * The bootstrap source must leave space at the proper offset 88 * for the label on such machines. 89 */ 90 91 #ifndef BBSIZE 92 #define BBSIZE 8192 /* size of boot area, with label */ 93 #endif 94 95 /* FIX! These are too low, but are traditional */ 96 #define DEFAULT_NEWFS_BLOCK 8192U 97 #define DEFAULT_NEWFS_FRAG 1024U 98 #define DEFAULT_NEWFS_CPG 16U 99 100 #define BIG_NEWFS_BLOCK 16384U 101 #define BIG_NEWFS_FRAG 2048U 102 #define BIG_NEWFS_CPG 64U 103 104 #if defined(__i386__) || defined(__ia64__) 105 #define NUMBOOT 2 106 #elif defined(__alpha__) || defined(__sparc64__) || defined(__powerpc__) 107 #define NUMBOOT 1 108 #else 109 #error I do not know about this architecture. 110 #endif 111 112 void makelabel(const char *, const char *, struct disklabel *); 113 int writelabel(int, const char *, struct disklabel *); 114 void l_perror(const char *); 115 struct disklabel *readlabel(int); 116 struct disklabel *makebootarea(char *, struct disklabel *, int); 117 void display(FILE *, const struct disklabel *); 118 int edit(struct disklabel *, int); 119 int editit(void); 120 char *skip(char *); 121 char *word(char *); 122 int getasciilabel(FILE *, struct disklabel *); 123 int getasciipartspec(char *, struct disklabel *, int, int); 124 int checklabel(struct disklabel *); 125 void setbootflag(struct disklabel *); 126 void Warning(const char *, ...) __printflike(1, 2); 127 void usage(void); 128 struct disklabel *getvirginlabel(void); 129 130 #define DEFEDITOR _PATH_VI 131 #define streq(a,b) (strcmp(a,b) == 0) 132 133 char *dkname; 134 char *specname; 135 char tmpfil[] = PATH_TMPFILE; 136 137 char namebuf[BBSIZE], *np = namebuf; 138 struct disklabel lab; 139 char bootarea[BBSIZE]; 140 char blank[] = ""; 141 char unknown[] = "unknown"; 142 143 #define MAX_PART ('z') 144 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 145 char part_size_type[MAX_NUM_PARTS]; 146 char part_offset_type[MAX_NUM_PARTS]; 147 int part_set[MAX_NUM_PARTS]; 148 149 #if NUMBOOT > 0 150 int installboot; /* non-zero if we should install a boot program */ 151 char *bootbuf; /* pointer to buffer with remainder of boot prog */ 152 int bootsize; /* size of remaining boot program */ 153 char *xxboot; /* primary boot */ 154 char *bootxx; /* secondary boot */ 155 char boot0[MAXPATHLEN]; 156 char boot1[MAXPATHLEN]; 157 #endif 158 159 enum { 160 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT 161 } op = UNSPEC; 162 163 int rflag; 164 int disable_write; /* set to disable writing to disk label */ 165 166 #define OPTIONS "BNRWb:enrs:w" 167 168 int 169 main(int argc, char *argv[]) 170 { 171 struct disklabel *lp; 172 FILE *t; 173 int ch, f = 0, flag, error = 0; 174 char *name = 0; 175 176 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 177 switch (ch) { 178 #if NUMBOOT > 0 179 case 'B': 180 ++installboot; 181 break; 182 case 'b': 183 xxboot = optarg; 184 break; 185 #if NUMBOOT > 1 186 case 's': 187 bootxx = optarg; 188 break; 189 #endif 190 #endif 191 case 'N': 192 if (op != UNSPEC) 193 usage(); 194 op = NOWRITE; 195 break; 196 case 'n': 197 disable_write = 1; 198 break; 199 case 'R': 200 if (op != UNSPEC) 201 usage(); 202 op = RESTORE; 203 break; 204 case 'W': 205 if (op != UNSPEC) 206 usage(); 207 op = WRITEABLE; 208 break; 209 case 'e': 210 if (op != UNSPEC) 211 usage(); 212 op = EDIT; 213 break; 214 case 'r': 215 ++rflag; 216 break; 217 case 'w': 218 if (op != UNSPEC) 219 usage(); 220 op = WRITE; 221 break; 222 case '?': 223 default: 224 usage(); 225 } 226 argc -= optind; 227 argv += optind; 228 #if NUMBOOT > 0 229 if (installboot) { 230 rflag++; 231 if (op == UNSPEC) 232 op = WRITEBOOT; 233 } else { 234 if (op == UNSPEC) 235 op = READ; 236 xxboot = bootxx = 0; 237 } 238 #else 239 if (op == UNSPEC) 240 op = READ; 241 #endif 242 if (argc < 1) 243 usage(); 244 245 dkname = argv[0]; 246 if (dkname[0] != '/') { 247 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART); 248 specname = np; 249 np += strlen(specname) + 1; 250 } else 251 specname = dkname; 252 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 253 if (f < 0 && errno == ENOENT && dkname[0] != '/') { 254 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname); 255 np = namebuf + strlen(specname) + 1; 256 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 257 } 258 if (f < 0) 259 err(4, "%s", specname); 260 261 switch(op) { 262 263 case UNSPEC: 264 break; 265 266 case EDIT: 267 if (argc != 1) 268 usage(); 269 lp = readlabel(f); 270 error = edit(lp, f); 271 break; 272 273 case NOWRITE: 274 flag = 0; 275 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 276 err(4, "ioctl DIOCWLABEL"); 277 break; 278 279 case READ: 280 if (argc != 1) 281 usage(); 282 lp = readlabel(f); 283 display(stdout, lp); 284 error = checklabel(lp); 285 break; 286 287 case RESTORE: 288 #if NUMBOOT > 0 289 if (installboot && argc == 3) { 290 makelabel(argv[2], 0, &lab); 291 argc--; 292 293 /* 294 * We only called makelabel() for its side effect 295 * of setting the bootstrap file names. Discard 296 * all changes to `lab' so that all values in the 297 * final label come from the ASCII label. 298 */ 299 bzero((char *)&lab, sizeof(lab)); 300 } 301 #endif 302 if (argc != 2) 303 usage(); 304 if (!(t = fopen(argv[1], "r"))) 305 err(4, "%s", argv[1]); 306 if (!getasciilabel(t, &lab)) 307 exit(1); 308 lp = makebootarea(bootarea, &lab, f); 309 *lp = lab; 310 error = writelabel(f, bootarea, lp); 311 break; 312 313 case WRITE: 314 if (argc == 3) { 315 name = argv[2]; 316 argc--; 317 } 318 if (argc != 2) 319 usage(); 320 makelabel(argv[1], name, &lab); 321 lp = makebootarea(bootarea, &lab, f); 322 *lp = lab; 323 if (checklabel(lp) == 0) 324 error = writelabel(f, bootarea, lp); 325 break; 326 327 case WRITEABLE: 328 flag = 1; 329 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 330 err(4, "ioctl DIOCWLABEL"); 331 break; 332 333 #if NUMBOOT > 0 334 case WRITEBOOT: 335 { 336 struct disklabel tlab; 337 338 lp = readlabel(f); 339 tlab = *lp; 340 if (argc == 2) 341 makelabel(argv[1], 0, &lab); 342 lp = makebootarea(bootarea, &lab, f); 343 *lp = tlab; 344 if (checklabel(lp) == 0) 345 error = writelabel(f, bootarea, lp); 346 break; 347 } 348 #endif 349 } 350 exit(error); 351 } 352 353 /* 354 * Construct a prototype disklabel from /etc/disktab. As a side 355 * effect, set the names of the primary and secondary boot files 356 * if specified. 357 */ 358 void 359 makelabel(const char *type, const char *name, struct disklabel *lp) 360 { 361 struct disklabel *dp; 362 363 if (strcmp(type, "auto") == 0) 364 dp = getvirginlabel(); 365 else 366 dp = getdiskbyname(type); 367 if (dp == NULL) 368 errx(1, "%s: unknown disk type", type); 369 *lp = *dp; 370 bzero(lp->d_packname, sizeof(lp->d_packname)); 371 if (name) 372 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 373 } 374 375 int 376 writelabel(int f, const char *boot, struct disklabel *lp) 377 { 378 int flag; 379 #ifdef __alpha__ 380 u_long *p, sum; 381 int i; 382 #endif 383 #ifdef __sparc64__ 384 struct sun_disklabel *sl; 385 u_short cksum, *sp1, *sp2; 386 struct partition *npp; 387 struct sun_dkpart *spp; 388 int i, secpercyl; 389 #endif 390 391 if (disable_write) { 392 Warning("write to disk label supressed - label was as follows:"); 393 display(stdout, lp); 394 return (0); 395 } else { 396 setbootflag(lp); 397 lp->d_magic = DISKMAGIC; 398 lp->d_magic2 = DISKMAGIC; 399 lp->d_checksum = 0; 400 lp->d_checksum = dkcksum(lp); 401 if (rflag) { 402 /* 403 * First set the kernel disk label, 404 * then write a label to the raw disk. 405 * If the SDINFO ioctl fails because it is unimplemented, 406 * keep going; otherwise, the kernel consistency checks 407 * may prevent us from changing the current (in-core) 408 * label. 409 */ 410 if (ioctl(f, DIOCSDINFO, lp) < 0 && 411 errno != ENODEV && errno != ENOTTY) { 412 l_perror("ioctl DIOCSDINFO"); 413 return (1); 414 } 415 (void)lseek(f, (off_t)0, SEEK_SET); 416 417 #ifdef __alpha__ 418 /* 419 * Generate the bootblock checksum for the SRM console. 420 */ 421 for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++) 422 sum += p[i]; 423 p[63] = sum; 424 #endif 425 #ifdef __sparc64__ 426 /* 427 * Generate a Sun disklabel around the BSD label for 428 * PROM compatability. 429 */ 430 sl = (struct sun_disklabel *)boot; 431 memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname)); 432 sl->sl_rpm = lp->d_rpm; 433 sl->sl_pcylinders = lp->d_ncylinders + 434 lp->d_acylinders; /* XXX */ 435 sl->sl_sparespercyl = lp->d_sparespercyl; 436 sl->sl_interleave = lp->d_interleave; 437 sl->sl_ncylinders = lp->d_ncylinders; 438 sl->sl_acylinders = lp->d_acylinders; 439 sl->sl_ntracks = lp->d_ntracks; 440 sl->sl_nsectors = lp->d_nsectors; 441 sl->sl_magic = SUN_DKMAGIC; 442 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 443 for (i = 0; i < 8; i++) { 444 spp = &sl->sl_part[i]; 445 npp = &lp->d_partitions[i]; 446 /* 447 * SunOS partitions must start on a cylinder 448 * boundary. Note this restriction is forced 449 * upon FreeBSD/sparc64 labels too, since we 450 * want to keep both labels synchronised. 451 */ 452 spp->sdkp_cyloffset = npp->p_offset / secpercyl; 453 spp->sdkp_nsectors = npp->p_size; 454 } 455 456 /* Compute the XOR checksum. */ 457 sp1 = (u_short *)sl; 458 sp2 = (u_short *)(sl + 1); 459 sl->sl_cksum = cksum = 0; 460 while (sp1 < sp2) 461 cksum ^= *sp1++; 462 sl->sl_cksum = cksum; 463 #endif 464 /* 465 * write enable label sector before write (if necessary), 466 * disable after writing. 467 */ 468 flag = 1; 469 if (ioctl(f, DIOCWLABEL, &flag) < 0) 470 warn("ioctl DIOCWLABEL"); 471 if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) { 472 warn("write"); 473 return (1); 474 } 475 #if NUMBOOT > 0 476 /* 477 * Output the remainder of the disklabel 478 */ 479 if (bootbuf && write(f, bootbuf, bootsize) != bootsize) { 480 warn("write"); 481 return(1); 482 } 483 #endif 484 flag = 0; 485 (void) ioctl(f, DIOCWLABEL, &flag); 486 } else if (ioctl(f, DIOCWDINFO, lp) < 0) { 487 l_perror("ioctl DIOCWDINFO"); 488 return (1); 489 } 490 } 491 return (0); 492 } 493 494 void 495 l_perror(const char *s) 496 { 497 switch (errno) { 498 499 case ESRCH: 500 warnx("%s: no disk label on disk;", s); 501 fprintf(stderr, "add \"-r\" to install initial label\n"); 502 break; 503 504 case EINVAL: 505 warnx("%s: label magic number or checksum is wrong!", s); 506 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 507 break; 508 509 case EBUSY: 510 warnx("%s: open partition would move or shrink", s); 511 break; 512 513 case EXDEV: 514 warnx("%s: '%c' partition must start at beginning of disk", 515 s, 'a' + RAW_PART); 516 break; 517 518 default: 519 warn((char *)NULL); 520 break; 521 } 522 } 523 524 /* 525 * Fetch disklabel for disk. 526 * Use ioctl to get label unless -r flag is given. 527 */ 528 struct disklabel * 529 readlabel(int f) 530 { 531 struct disklabel *lp; 532 533 if (rflag) { 534 if (read(f, bootarea, BBSIZE) < BBSIZE) 535 err(4, "%s", specname); 536 for (lp = (struct disklabel *)bootarea; 537 lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp)); 538 lp = (struct disklabel *)((char *)lp + 16)) 539 if (lp->d_magic == DISKMAGIC && 540 lp->d_magic2 == DISKMAGIC) 541 break; 542 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) || 543 lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC || 544 dkcksum(lp) != 0) 545 errx(1, 546 "bad pack magic number (label is damaged, or pack is unlabeled)"); 547 } else { 548 lp = &lab; 549 if (ioctl(f, DIOCGDINFO, lp) < 0) 550 err(4, "ioctl DIOCGDINFO"); 551 } 552 return (lp); 553 } 554 555 /* 556 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 557 * Returns a pointer to the disklabel portion of the bootarea. 558 */ 559 struct disklabel * 560 makebootarea(char *boot, struct disklabel *dp, int f) 561 { 562 struct disklabel *lp; 563 char *p; 564 int b; 565 #if NUMBOOT > 0 566 char *dkbasename; 567 struct stat sb; 568 #endif 569 #ifdef __alpha__ 570 u_long *bootinfo; 571 int n; 572 #endif 573 #ifdef __i386__ 574 char *tmpbuf; 575 int i, found; 576 #endif 577 578 /* XXX */ 579 if (dp->d_secsize == 0) { 580 dp->d_secsize = DEV_BSIZE; 581 dp->d_bbsize = BBSIZE; 582 } 583 lp = (struct disklabel *) 584 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET); 585 bzero((char *)lp, sizeof *lp); 586 #if NUMBOOT > 0 587 /* 588 * If we are not installing a boot program but we are installing a 589 * label on disk then we must read the current bootarea so we don't 590 * clobber the existing boot. 591 */ 592 if (!installboot) { 593 if (rflag) { 594 if (read(f, boot, BBSIZE) < BBSIZE) 595 err(4, "%s", specname); 596 bzero((char *)lp, sizeof *lp); 597 } 598 return (lp); 599 } 600 /* 601 * We are installing a boot program. Determine the name(s) and 602 * read them into the appropriate places in the boot area. 603 */ 604 if (!xxboot || !bootxx) { 605 dkbasename = np; 606 if ((p = rindex(dkname, '/')) == NULL) 607 p = dkname; 608 else 609 p++; 610 while (*p && !isdigit(*p)) 611 *np++ = *p++; 612 *np++ = '\0'; 613 614 if (!xxboot) { 615 (void)sprintf(boot0, "%s/boot1", _PATH_BOOTDIR); 616 xxboot = boot0; 617 } 618 #if NUMBOOT > 1 619 if (!bootxx) { 620 (void)sprintf(boot1, "%s/boot2", _PATH_BOOTDIR); 621 bootxx = boot1; 622 } 623 #endif 624 } 625 626 /* 627 * Strange rules: 628 * 1. One-piece bootstrap (hp300/hp800) 629 * 1. One-piece bootstrap (alpha/sparc64) 630 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest 631 * is remembered and written later following the bootarea. 632 * 2. Two-piece bootstraps (i386/ia64) 633 * up to d_secsize bytes of ``xxboot'' go in first d_secsize 634 * bytes of bootarea, remaining d_bbsize-d_secsize filled 635 * from ``bootxx''. 636 */ 637 b = open(xxboot, O_RDONLY); 638 if (b < 0) 639 err(4, "%s", xxboot); 640 #if NUMBOOT > 1 641 #ifdef __i386__ 642 /* 643 * XXX Botch alert. 644 * The i386 has the so-called fdisk table embedded into the 645 * primary bootstrap. We take care to not clobber it, but 646 * only if it does already contain some data. (Otherwise, 647 * the xxboot provides a template.) 648 */ 649 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) 650 err(4, "%s", xxboot); 651 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 652 #endif /* __i386__ */ 653 if (read(b, boot, (int)dp->d_secsize) < 0) 654 err(4, "%s", xxboot); 655 (void)close(b); 656 #ifdef __i386__ 657 for (i = DOSPARTOFF, found = 0; 658 !found && i < (int)(DOSPARTOFF + NDOSPART*sizeof(struct dos_partition)); 659 i++) 660 found = tmpbuf[i] != 0; 661 if (found) 662 memcpy((void *)&boot[DOSPARTOFF], 663 (void *)&tmpbuf[DOSPARTOFF], 664 NDOSPART * sizeof(struct dos_partition)); 665 free(tmpbuf); 666 #endif /* __i386__ */ 667 b = open(bootxx, O_RDONLY); 668 if (b < 0) 669 err(4, "%s", bootxx); 670 if (fstat(b, &sb) != 0) 671 err(4, "%s", bootxx); 672 if (dp->d_secsize + sb.st_size > dp->d_bbsize) 673 errx(4, "%s too large", bootxx); 674 if (read(b, &boot[dp->d_secsize], 675 (int)(dp->d_bbsize-dp->d_secsize)) < 0) 676 err(4, "%s", bootxx); 677 #else /* !(NUMBOOT > 1) */ 678 #ifdef __alpha__ 679 /* 680 * On the alpha, the primary bootstrap starts at the 681 * second sector of the boot area. The first sector 682 * contains the label and must be edited to contain the 683 * size and location of the primary bootstrap. 684 */ 685 n = read(b, boot + dp->d_secsize, (int)dp->d_bbsize); 686 if (n < 0) 687 err(4, "%s", xxboot); 688 bootinfo = (u_long *)(boot + 480); 689 bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize; 690 bootinfo[1] = 1; /* start at sector 1 */ 691 bootinfo[2] = 0; /* flags (must be zero) */ 692 #else /* !__alpha__ */ 693 if (read(b, boot, (int)dp->d_bbsize) < 0) 694 err(4, "%s", xxboot); 695 #endif /* __alpha__ */ 696 if (fstat(b, &sb) != 0) 697 err(4, "%s", xxboot); 698 bootsize = (int)sb.st_size - dp->d_bbsize; 699 if (bootsize > 0) { 700 /* XXX assume d_secsize is a power of two */ 701 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1); 702 bootbuf = (char *)malloc((size_t)bootsize); 703 if (bootbuf == 0) 704 err(4, "%s", xxboot); 705 if (read(b, bootbuf, bootsize) < 0) { 706 free(bootbuf); 707 err(4, "%s", xxboot); 708 } 709 } 710 #endif /* NUMBOOT > 1 */ 711 (void)close(b); 712 #endif /* NUMBOOT > 0 */ 713 /* 714 * Make sure no part of the bootstrap is written in the area 715 * reserved for the label. 716 */ 717 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++) 718 if (*p) 719 errx(2, "bootstrap doesn't leave room for disk label"); 720 return (lp); 721 } 722 723 void 724 display(FILE *f, const struct disklabel *lp) 725 { 726 int i, j; 727 const struct partition *pp; 728 729 fprintf(f, "# %s:\n", specname); 730 if ((unsigned) lp->d_type < DKMAXTYPES) 731 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 732 else 733 fprintf(f, "type: %u\n", lp->d_type); 734 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 735 lp->d_typename); 736 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 737 lp->d_packname); 738 fprintf(f, "flags:"); 739 if (lp->d_flags & D_REMOVABLE) 740 fprintf(f, " removeable"); 741 if (lp->d_flags & D_ECC) 742 fprintf(f, " ecc"); 743 if (lp->d_flags & D_BADSECT) 744 fprintf(f, " badsect"); 745 fprintf(f, "\n"); 746 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 747 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 748 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 749 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 750 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 751 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 752 fprintf(f, "rpm: %u\n", lp->d_rpm); 753 fprintf(f, "interleave: %u\n", lp->d_interleave); 754 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 755 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 756 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 757 (u_long)lp->d_headswitch); 758 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 759 (u_long)lp->d_trkseek); 760 fprintf(f, "drivedata: "); 761 for (i = NDDATA - 1; i >= 0; i--) 762 if (lp->d_drivedata[i]) 763 break; 764 if (i < 0) 765 i = 0; 766 for (j = 0; j <= i; j++) 767 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 768 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 769 fprintf(f, 770 "# size offset fstype [fsize bsize bps/cpg]\n"); 771 pp = lp->d_partitions; 772 for (i = 0; i < lp->d_npartitions; i++, pp++) { 773 if (pp->p_size) { 774 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 775 (u_long)pp->p_size, (u_long)pp->p_offset); 776 if ((unsigned) pp->p_fstype < FSMAXTYPES) 777 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 778 else 779 fprintf(f, "%8d", pp->p_fstype); 780 switch (pp->p_fstype) { 781 782 case FS_UNUSED: /* XXX */ 783 fprintf(f, " %5lu %5lu %5.5s ", 784 (u_long)pp->p_fsize, 785 (u_long)(pp->p_fsize * pp->p_frag), ""); 786 break; 787 788 case FS_BSDFFS: 789 fprintf(f, " %5lu %5lu %5u ", 790 (u_long)pp->p_fsize, 791 (u_long)(pp->p_fsize * pp->p_frag), 792 pp->p_cpg); 793 break; 794 795 case FS_BSDLFS: 796 fprintf(f, " %5lu %5lu %5d", 797 (u_long)pp->p_fsize, 798 (u_long)(pp->p_fsize * pp->p_frag), 799 pp->p_cpg); 800 break; 801 802 default: 803 fprintf(f, "%20.20s", ""); 804 break; 805 } 806 fprintf(f, "\t# (Cyl. %4lu", 807 (u_long)(pp->p_offset / lp->d_secpercyl)); 808 if (pp->p_offset % lp->d_secpercyl) 809 putc('*', f); 810 else 811 putc(' ', f); 812 fprintf(f, "- %lu", 813 (u_long)((pp->p_offset + pp->p_size + 814 lp->d_secpercyl - 1) / 815 lp->d_secpercyl - 1)); 816 if (pp->p_size % lp->d_secpercyl) 817 putc('*', f); 818 fprintf(f, ")\n"); 819 } 820 } 821 fflush(f); 822 } 823 824 int 825 edit(struct disklabel *lp, int f) 826 { 827 int c, fd; 828 struct disklabel label; 829 FILE *fp; 830 831 if ((fd = mkstemp(tmpfil)) == -1 || 832 (fp = fdopen(fd, "w")) == NULL) { 833 warnx("can't create %s", tmpfil); 834 return (1); 835 } 836 display(fp, lp); 837 fclose(fp); 838 for (;;) { 839 if (!editit()) 840 break; 841 fp = fopen(tmpfil, "r"); 842 if (fp == NULL) { 843 warnx("can't reopen %s for reading", tmpfil); 844 break; 845 } 846 bzero((char *)&label, sizeof(label)); 847 if (getasciilabel(fp, &label)) { 848 *lp = label; 849 if (writelabel(f, bootarea, lp) == 0) { 850 fclose(fp); 851 (void) unlink(tmpfil); 852 return (0); 853 } 854 } 855 fclose(fp); 856 printf("re-edit the label? [y]: "); fflush(stdout); 857 c = getchar(); 858 if (c != EOF && c != (int)'\n') 859 while (getchar() != (int)'\n') 860 ; 861 if (c == (int)'n') 862 break; 863 } 864 (void) unlink(tmpfil); 865 return (1); 866 } 867 868 int 869 editit(void) 870 { 871 int pid, xpid; 872 int locstat, omask; 873 const char *ed; 874 875 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 876 while ((pid = fork()) < 0) { 877 if (errno == EPROCLIM) { 878 warnx("you have too many processes"); 879 return(0); 880 } 881 if (errno != EAGAIN) { 882 warn("fork"); 883 return(0); 884 } 885 sleep(1); 886 } 887 if (pid == 0) { 888 sigsetmask(omask); 889 setgid(getgid()); 890 setuid(getuid()); 891 if ((ed = getenv("EDITOR")) == (char *)0) 892 ed = DEFEDITOR; 893 execlp(ed, ed, tmpfil, (char *)0); 894 err(1, "%s", ed); 895 } 896 while ((xpid = wait(&locstat)) >= 0) 897 if (xpid == pid) 898 break; 899 sigsetmask(omask); 900 return(!locstat); 901 } 902 903 char * 904 skip(char *cp) 905 { 906 907 while (*cp != '\0' && isspace(*cp)) 908 cp++; 909 if (*cp == '\0' || *cp == '#') 910 return (NULL); 911 return (cp); 912 } 913 914 char * 915 word(char *cp) 916 { 917 char c; 918 919 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 920 cp++; 921 if ((c = *cp) != '\0') { 922 *cp++ = '\0'; 923 if (c != '#') 924 return (skip(cp)); 925 } 926 return (NULL); 927 } 928 929 /* 930 * Read an ascii label in from fd f, 931 * in the same format as that put out by display(), 932 * and fill in lp. 933 */ 934 int 935 getasciilabel(FILE *f, struct disklabel *lp) 936 { 937 char *cp; 938 const char **cpp; 939 unsigned int part; 940 char *tp, line[BUFSIZ]; 941 int v, lineno = 0, errors = 0; 942 int i; 943 944 lp->d_bbsize = BBSIZE; /* XXX */ 945 lp->d_sbsize = 0; /* XXX */ 946 while (fgets(line, sizeof(line) - 1, f)) { 947 lineno++; 948 if ((cp = index(line,'\n')) != 0) 949 *cp = '\0'; 950 cp = skip(line); 951 if (cp == NULL) 952 continue; 953 tp = index(cp, ':'); 954 if (tp == NULL) { 955 fprintf(stderr, "line %d: syntax error\n", lineno); 956 errors++; 957 continue; 958 } 959 *tp++ = '\0', tp = skip(tp); 960 if (streq(cp, "type")) { 961 if (tp == NULL) 962 tp = unknown; 963 cpp = dktypenames; 964 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 965 if (*cpp && streq(*cpp, tp)) { 966 lp->d_type = cpp - dktypenames; 967 break; 968 } 969 if (cpp < &dktypenames[DKMAXTYPES]) 970 continue; 971 v = atoi(tp); 972 if ((unsigned)v >= DKMAXTYPES) 973 fprintf(stderr, "line %d:%s %d\n", lineno, 974 "Warning, unknown disk type", v); 975 lp->d_type = v; 976 continue; 977 } 978 if (streq(cp, "flags")) { 979 for (v = 0; (cp = tp) && *cp != '\0';) { 980 tp = word(cp); 981 if (streq(cp, "removeable")) 982 v |= D_REMOVABLE; 983 else if (streq(cp, "ecc")) 984 v |= D_ECC; 985 else if (streq(cp, "badsect")) 986 v |= D_BADSECT; 987 else { 988 fprintf(stderr, 989 "line %d: %s: bad flag\n", 990 lineno, cp); 991 errors++; 992 } 993 } 994 lp->d_flags = v; 995 continue; 996 } 997 if (streq(cp, "drivedata")) { 998 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 999 lp->d_drivedata[i++] = atoi(cp); 1000 tp = word(cp); 1001 } 1002 continue; 1003 } 1004 if (sscanf(cp, "%d partitions", &v) == 1) { 1005 if (v == 0 || (unsigned)v > MAXPARTITIONS) { 1006 fprintf(stderr, 1007 "line %d: bad # of partitions\n", lineno); 1008 lp->d_npartitions = MAXPARTITIONS; 1009 errors++; 1010 } else 1011 lp->d_npartitions = v; 1012 continue; 1013 } 1014 if (tp == NULL) 1015 tp = blank; 1016 if (streq(cp, "disk")) { 1017 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 1018 continue; 1019 } 1020 if (streq(cp, "label")) { 1021 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 1022 continue; 1023 } 1024 if (streq(cp, "bytes/sector")) { 1025 v = atoi(tp); 1026 if (v <= 0 || (v % DEV_BSIZE) != 0) { 1027 fprintf(stderr, 1028 "line %d: %s: bad sector size\n", 1029 lineno, tp); 1030 errors++; 1031 } else 1032 lp->d_secsize = v; 1033 continue; 1034 } 1035 if (streq(cp, "sectors/track")) { 1036 v = atoi(tp); 1037 if (v <= 0) { 1038 fprintf(stderr, "line %d: %s: bad %s\n", 1039 lineno, tp, cp); 1040 errors++; 1041 } else 1042 lp->d_nsectors = v; 1043 continue; 1044 } 1045 if (streq(cp, "sectors/cylinder")) { 1046 v = atoi(tp); 1047 if (v <= 0) { 1048 fprintf(stderr, "line %d: %s: bad %s\n", 1049 lineno, tp, cp); 1050 errors++; 1051 } else 1052 lp->d_secpercyl = v; 1053 continue; 1054 } 1055 if (streq(cp, "tracks/cylinder")) { 1056 v = atoi(tp); 1057 if (v <= 0) { 1058 fprintf(stderr, "line %d: %s: bad %s\n", 1059 lineno, tp, cp); 1060 errors++; 1061 } else 1062 lp->d_ntracks = v; 1063 continue; 1064 } 1065 if (streq(cp, "cylinders")) { 1066 v = atoi(tp); 1067 if (v <= 0) { 1068 fprintf(stderr, "line %d: %s: bad %s\n", 1069 lineno, tp, cp); 1070 errors++; 1071 } else 1072 lp->d_ncylinders = v; 1073 continue; 1074 } 1075 if (streq(cp, "sectors/unit")) { 1076 v = atoi(tp); 1077 if (v <= 0) { 1078 fprintf(stderr, "line %d: %s: bad %s\n", 1079 lineno, tp, cp); 1080 errors++; 1081 } else 1082 lp->d_secperunit = v; 1083 continue; 1084 } 1085 if (streq(cp, "rpm")) { 1086 v = atoi(tp); 1087 if (v <= 0) { 1088 fprintf(stderr, "line %d: %s: bad %s\n", 1089 lineno, tp, cp); 1090 errors++; 1091 } else 1092 lp->d_rpm = v; 1093 continue; 1094 } 1095 if (streq(cp, "interleave")) { 1096 v = atoi(tp); 1097 if (v <= 0) { 1098 fprintf(stderr, "line %d: %s: bad %s\n", 1099 lineno, tp, cp); 1100 errors++; 1101 } else 1102 lp->d_interleave = v; 1103 continue; 1104 } 1105 if (streq(cp, "trackskew")) { 1106 v = atoi(tp); 1107 if (v < 0) { 1108 fprintf(stderr, "line %d: %s: bad %s\n", 1109 lineno, tp, cp); 1110 errors++; 1111 } else 1112 lp->d_trackskew = v; 1113 continue; 1114 } 1115 if (streq(cp, "cylinderskew")) { 1116 v = atoi(tp); 1117 if (v < 0) { 1118 fprintf(stderr, "line %d: %s: bad %s\n", 1119 lineno, tp, cp); 1120 errors++; 1121 } else 1122 lp->d_cylskew = v; 1123 continue; 1124 } 1125 if (streq(cp, "headswitch")) { 1126 v = atoi(tp); 1127 if (v < 0) { 1128 fprintf(stderr, "line %d: %s: bad %s\n", 1129 lineno, tp, cp); 1130 errors++; 1131 } else 1132 lp->d_headswitch = v; 1133 continue; 1134 } 1135 if (streq(cp, "track-to-track seek")) { 1136 v = atoi(tp); 1137 if (v < 0) { 1138 fprintf(stderr, "line %d: %s: bad %s\n", 1139 lineno, tp, cp); 1140 errors++; 1141 } else 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) = atoi(cp); \ 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) = strtol(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 */ 1201 int 1202 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1203 { 1204 struct partition *pp; 1205 char *cp; 1206 const char **cpp; 1207 int 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 || (v == 0 && part_size_type[part] != '*')) { 1215 fprintf(stderr, "line %d: %s: bad partition size\n", lineno, 1216 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 || (v == 0 && part_offset_type[part] != '*' && 1224 part_offset_type[part] != '\0')) { 1225 fprintf(stderr, "line %d: %s: bad partition offset\n", lineno, 1226 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 = atoi(cp); 1239 else 1240 v = FSMAXTYPES; 1241 if ((unsigned)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 */ 1306 int 1307 checklabel(struct disklabel *lp) 1308 { 1309 struct partition *pp; 1310 int i, errors = 0; 1311 char part; 1312 unsigned 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 fprintf(stderr, 1467 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1468 (long)pp->p_offset,i+'a',current_offset); 1469 fprintf(stderr, 1470 "Labels with any *'s for offset must be in ascending order by sector\n"); 1471 errors++; 1472 } else if (pp->p_offset != current_offset && 1473 i != RAW_PART && seen_default_offset) { 1474 /* 1475 * this may give unneeded warnings if 1476 * partitions are out-of-order 1477 */ 1478 Warning( 1479 "Offset %ld for partition %c doesn't match expected value %ld", 1480 (long)pp->p_offset, i + 'a', current_offset); 1481 } 1482 } 1483 if (i != RAW_PART) 1484 current_offset = pp->p_offset + pp->p_size; 1485 } 1486 } 1487 1488 for (i = 0; i < lp->d_npartitions; i++) { 1489 part = 'a' + i; 1490 pp = &lp->d_partitions[i]; 1491 if (pp->p_size == 0 && pp->p_offset != 0) 1492 Warning("partition %c: size 0, but offset %lu", 1493 part, (u_long)pp->p_offset); 1494 #ifdef __sparc64__ 1495 /* See comment in writelabel(). */ 1496 if (pp->p_offset % lp->d_secpercyl != 0) { 1497 fprintf(stderr, "partition %c: does not start on a " 1498 "cylinder boundary!\n", part); 1499 errors++; 1500 } 1501 #endif 1502 #ifdef notdef 1503 if (pp->p_size % lp->d_secpercyl) 1504 Warning("partition %c: size %% cylinder-size != 0", 1505 part); 1506 if (pp->p_offset % lp->d_secpercyl) 1507 Warning("partition %c: offset %% cylinder-size != 0", 1508 part); 1509 #endif 1510 if (pp->p_offset > lp->d_secperunit) { 1511 fprintf(stderr, 1512 "partition %c: offset past end of unit\n", part); 1513 errors++; 1514 } 1515 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1516 fprintf(stderr, 1517 "partition %c: partition extends past end of unit\n", 1518 part); 1519 errors++; 1520 } 1521 if (i == RAW_PART) 1522 { 1523 if (pp->p_fstype != FS_UNUSED) 1524 Warning("partition %c is not marked as unused!",part); 1525 if (pp->p_offset != 0) 1526 Warning("partition %c doesn't start at 0!",part); 1527 if (pp->p_size != lp->d_secperunit) 1528 Warning("partition %c doesn't cover the whole unit!",part); 1529 1530 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1531 (pp->p_size != lp->d_secperunit)) { 1532 Warning("An incorrect partition %c may cause problems for " 1533 "standard system utilities",part); 1534 } 1535 } 1536 1537 /* check for overlaps */ 1538 /* this will check for all possible overlaps once and only once */ 1539 for (j = 0; j < i; j++) { 1540 if (j != RAW_PART && i != RAW_PART && 1541 part_set[i] && part_set[j]) { 1542 pp2 = &lp->d_partitions[j]; 1543 if (pp2->p_offset < pp->p_offset + pp->p_size && 1544 (pp2->p_offset + pp2->p_size > pp->p_offset || 1545 pp2->p_offset >= pp->p_offset)) { 1546 fprintf(stderr,"partitions %c and %c overlap!\n", 1547 j + 'a', i + 'a'); 1548 errors++; 1549 } 1550 } 1551 } 1552 } 1553 for (; i < MAXPARTITIONS; i++) { 1554 part = 'a' + i; 1555 pp = &lp->d_partitions[i]; 1556 if (pp->p_size || pp->p_offset) 1557 Warning("unused partition %c: size %d offset %lu", 1558 'a' + i, pp->p_size, (u_long)pp->p_offset); 1559 } 1560 return (errors); 1561 } 1562 1563 /* 1564 * When operating on a "virgin" disk, try getting an initial label 1565 * from the associated device driver. This might work for all device 1566 * drivers that are able to fetch some initial device parameters 1567 * without even having access to a (BSD) disklabel, like SCSI disks, 1568 * most IDE drives, or vn devices. 1569 * 1570 * The device name must be given in its "canonical" form. 1571 */ 1572 struct disklabel * 1573 getvirginlabel(void) 1574 { 1575 static struct disklabel loclab; 1576 char lnamebuf[BBSIZE]; 1577 int f; 1578 1579 if (dkname[0] == '/') { 1580 warnx("\"auto\" requires the usage of a canonical disk name"); 1581 return (NULL); 1582 } 1583 (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname); 1584 if ((f = open(lnamebuf, O_RDONLY)) == -1) { 1585 warn("cannot open %s", lnamebuf); 1586 return (NULL); 1587 } 1588 1589 /* 1590 * Try to use the new get-virgin-label ioctl. If it fails, 1591 * fallback to the old get-disdk-info ioctl. 1592 */ 1593 if (ioctl(f, DIOCGDVIRGIN, &loclab) == 0) 1594 goto out; 1595 if (ioctl(f, DIOCGDINFO, &loclab) == 0) 1596 goto out; 1597 close(f); 1598 (void)snprintf(lnamebuf, BBSIZE, "%s%s%c", _PATH_DEV, dkname, 1599 'a' + RAW_PART); 1600 if ((f = open(lnamebuf, O_RDONLY)) == -1) { 1601 warn("cannot open %s", lnamebuf); 1602 return (NULL); 1603 } 1604 if (ioctl(f, DIOCGDINFO, &loclab) == 0) 1605 goto out; 1606 close(f); 1607 warn("No virgin disklabel found %s", lnamebuf); 1608 return (NULL); 1609 out: 1610 close(f); 1611 return (&loclab); 1612 } 1613 1614 /* 1615 * If we are installing a boot program that doesn't fit in d_bbsize 1616 * we need to mark those partitions that the boot overflows into. 1617 * This allows newfs to prevent creation of a file system where it might 1618 * clobber bootstrap code. 1619 */ 1620 void 1621 setbootflag(struct disklabel *lp) 1622 { 1623 struct partition *pp; 1624 int i, errors = 0; 1625 char part; 1626 u_long boffset; 1627 1628 if (bootbuf == 0) 1629 return; 1630 boffset = bootsize / lp->d_secsize; 1631 for (i = 0; i < lp->d_npartitions; i++) { 1632 part = 'a' + i; 1633 pp = &lp->d_partitions[i]; 1634 if (pp->p_size == 0) 1635 continue; 1636 if (boffset <= pp->p_offset) { 1637 if (pp->p_fstype == FS_BOOT) 1638 pp->p_fstype = FS_UNUSED; 1639 } else if (pp->p_fstype != FS_BOOT) { 1640 if (pp->p_fstype != FS_UNUSED) { 1641 fprintf(stderr, 1642 "boot overlaps used partition %c\n", 1643 part); 1644 errors++; 1645 } else { 1646 pp->p_fstype = FS_BOOT; 1647 Warning("boot overlaps partition %c, %s", 1648 part, "marked as FS_BOOT"); 1649 } 1650 } 1651 } 1652 if (errors) 1653 errx(4, "cannot install boot program"); 1654 } 1655 1656 /*VARARGS1*/ 1657 void 1658 Warning(const char *fmt, ...) 1659 { 1660 va_list ap; 1661 1662 fprintf(stderr, "Warning, "); 1663 va_start(ap, fmt); 1664 vfprintf(stderr, fmt, ap); 1665 fprintf(stderr, "\n"); 1666 va_end(ap); 1667 } 1668 1669 void 1670 usage(void) 1671 { 1672 #if NUMBOOT > 0 1673 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", 1674 "usage: disklabel [-r] disk", 1675 "\t\t(to read label)", 1676 " disklabel -w [-r] [-n] disk type [ packid ]", 1677 "\t\t(to write label with existing boot program)", 1678 " disklabel -e [-r] [-n] disk", 1679 "\t\t(to edit label)", 1680 " disklabel -R [-r] [-n] disk protofile", 1681 "\t\t(to restore label with existing boot program)", 1682 #if NUMBOOT > 1 1683 " disklabel -B [-n] [ -b boot1 [ -s boot2 ] ] disk [ type ]", 1684 "\t\t(to install boot program with existing label)", 1685 " disklabel -w -B [-n] [ -b boot1 [ -s boot2 ] ] disk type [ packid ]", 1686 "\t\t(to write label and boot program)", 1687 " disklabel -R -B [-n] [ -b boot1 [ -s boot2 ] ] disk protofile [ type ]", 1688 "\t\t(to restore label and boot program)", 1689 #else 1690 " disklabel -B [-n] [ -b bootprog ] disk [ type ]", 1691 "\t\t(to install boot program with existing on-disk label)", 1692 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]", 1693 "\t\t(to write label and install boot program)", 1694 " disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]", 1695 "\t\t(to restore label and install boot program)", 1696 #endif 1697 " disklabel [-NW] disk", 1698 "\t\t(to write disable/enable label)"); 1699 #else 1700 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1701 "usage: disklabel [-r] disk", "(to read label)", 1702 " disklabel -w [-r] [-n] disk type [ packid ]", 1703 "\t\t(to write label)", 1704 " disklabel -e [-r] [-n] disk", 1705 "\t\t(to edit label)", 1706 " disklabel -R [-r] [-n] disk protofile", 1707 "\t\t(to restore label)", 1708 " disklabel [-NW] disk", 1709 "\t\t(to write disable/enable label)"); 1710 #endif 1711 exit(1); 1712 } 1713