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 #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 73 #include <unistd.h> 74 #include <string.h> 75 #include <stdio.h> 76 #include <stdlib.h> 77 #include <signal.h> 78 #include <stdarg.h> 79 #include <ctype.h> 80 #include <err.h> 81 #include <errno.h> 82 83 #include "pathnames.h" 84 85 /* 86 * Disklabel: read and write disklabels. 87 * The label is usually placed on one of the first sectors of the disk. 88 * Many machines also place a bootstrap in the same area, 89 * in which case the label is embedded in the bootstrap. 90 * The bootstrap source must leave space at the proper offset 91 * for the label on such machines. 92 */ 93 94 #ifndef BBSIZE 95 #define BBSIZE 8192 /* size of boot area, with label */ 96 #endif 97 98 /* FIX! These are too low, but are traditional */ 99 #define DEFAULT_NEWFS_BLOCK 8192U 100 #define DEFAULT_NEWFS_FRAG 1024U 101 #define DEFAULT_NEWFS_CPG 16U 102 103 #define BIG_NEWFS_BLOCK 16384U 104 #define BIG_NEWFS_FRAG 2048U 105 #define BIG_NEWFS_CPG 64U 106 107 #if defined(__i386__) 108 #elif defined(__alpha__) 109 #elif defined(__ia64__) 110 #else 111 #error I do not know about this architecture, and shall probably not be compiled for it. 112 #endif 113 114 void makelabel(const char *, const char *, struct disklabel *); 115 int writelabel(int, const char *, struct disklabel *); 116 void l_perror(const char *); 117 struct disklabel *readlabel(int); 118 struct disklabel *makebootarea(char *, struct disklabel *, int); 119 void display(FILE *, const struct disklabel *); 120 int edit(struct disklabel *, int); 121 int editit(void); 122 char *skip(char *); 123 char *word(char *); 124 int getasciilabel(FILE *, struct disklabel *); 125 int getasciipartspec(char *, struct disklabel *, int, int); 126 int checklabel(struct disklabel *); 127 void Warning(const char *, ...) __printflike(1, 2); 128 void usage(void); 129 struct disklabel *getvirginlabel(void); 130 131 #define DEFEDITOR _PATH_VI 132 #define streq(a,b) (strcmp(a,b) == 0) 133 134 char *dkname; 135 char *specname; 136 char tmpfil[] = PATH_TMPFILE; 137 138 char namebuf[BBSIZE], *np = namebuf; 139 struct disklabel lab; 140 char bootarea[BBSIZE]; 141 char blank[] = ""; 142 char unknown[] = "unknown"; 143 144 #define MAX_PART ('z') 145 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 146 char part_size_type[MAX_NUM_PARTS]; 147 char part_offset_type[MAX_NUM_PARTS]; 148 int part_set[MAX_NUM_PARTS]; 149 150 int installboot; /* non-zero if we should install a boot program */ 151 char *xxboot; /* primary boot */ 152 char boot0[MAXPATHLEN]; 153 154 enum { 155 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT 156 } op = UNSPEC; 157 158 int rflag; 159 int disable_write; /* set to disable writing to disk label */ 160 161 #define OPTIONS "BRb:enrs:w" 162 163 int 164 main(int argc, char *argv[]) 165 { 166 struct disklabel *lp; 167 FILE *t; 168 int ch, f = 0, error = 0; 169 char *name = 0; 170 171 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 172 switch (ch) { 173 case 'B': 174 ++installboot; 175 break; 176 case 'b': 177 xxboot = optarg; 178 break; 179 case 'n': 180 disable_write = 1; 181 break; 182 case 'R': 183 if (op != UNSPEC) 184 usage(); 185 op = RESTORE; 186 break; 187 case 'e': 188 if (op != UNSPEC) 189 usage(); 190 op = EDIT; 191 break; 192 case 'r': 193 ++rflag; 194 break; 195 case 'w': 196 if (op != UNSPEC) 197 usage(); 198 op = WRITE; 199 break; 200 case '?': 201 default: 202 usage(); 203 } 204 argc -= optind; 205 argv += optind; 206 if (installboot) { 207 rflag++; 208 if (op == UNSPEC) 209 op = WRITEBOOT; 210 } else { 211 if (op == UNSPEC) 212 op = READ; 213 xxboot = 0; 214 } 215 if (argc < 1) 216 usage(); 217 218 dkname = argv[0]; 219 if (dkname[0] != '/') { 220 (void)sprintf(np, "%s%s%c", _PATH_DEV, dkname, 'a' + RAW_PART); 221 specname = np; 222 np += strlen(specname) + 1; 223 } else 224 specname = dkname; 225 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 226 if (f < 0 && errno == ENOENT && dkname[0] != '/') { 227 (void)sprintf(specname, "%s%s", _PATH_DEV, dkname); 228 np = namebuf + strlen(specname) + 1; 229 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 230 } 231 if (f < 0 && errno == EBUSY) { 232 /* lets try to get by with ioctls */ 233 f = open(specname, O_RDONLY); 234 } 235 if (f < 0) 236 err(4, "%s", specname); 237 238 switch(op) { 239 240 case UNSPEC: 241 break; 242 243 case EDIT: 244 if (argc != 1) 245 usage(); 246 lp = readlabel(f); 247 error = edit(lp, f); 248 break; 249 250 case READ: 251 if (argc != 1) 252 usage(); 253 lp = readlabel(f); 254 display(stdout, lp); 255 error = checklabel(lp); 256 break; 257 258 case RESTORE: 259 if (argc != 2) 260 usage(); 261 if (!(t = fopen(argv[1], "r"))) 262 err(4, "%s", argv[1]); 263 if (!getasciilabel(t, &lab)) 264 exit(1); 265 lp = makebootarea(bootarea, &lab, f); 266 *lp = lab; 267 error = writelabel(f, bootarea, lp); 268 break; 269 270 case WRITE: 271 if (argc == 3) { 272 name = argv[2]; 273 argc--; 274 } 275 if (argc != 2) 276 usage(); 277 makelabel(argv[1], name, &lab); 278 lp = makebootarea(bootarea, &lab, f); 279 *lp = lab; 280 if (checklabel(lp) == 0) 281 error = writelabel(f, bootarea, lp); 282 break; 283 284 case WRITEBOOT: 285 { 286 struct disklabel tlab; 287 288 lp = readlabel(f); 289 tlab = *lp; 290 if (argc == 2) 291 makelabel(argv[1], 0, &lab); 292 lp = makebootarea(bootarea, &lab, f); 293 *lp = tlab; 294 if (checklabel(lp) == 0) 295 error = writelabel(f, bootarea, lp); 296 break; 297 } 298 } 299 exit(error); 300 } 301 302 /* 303 * Construct a prototype disklabel from /etc/disktab. 304 */ 305 void 306 makelabel(const char *type, const char *name, struct disklabel *lp) 307 { 308 struct disklabel *dp; 309 310 if (strcmp(type, "auto") == 0) 311 dp = getvirginlabel(); 312 else 313 dp = getdiskbyname(type); 314 if (dp == NULL) 315 errx(1, "%s: unknown disk type", type); 316 *lp = *dp; 317 bzero(lp->d_packname, sizeof(lp->d_packname)); 318 if (name) 319 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 320 } 321 322 int 323 writelabel(int f, const char *boot, struct disklabel *lp) 324 { 325 #ifdef __alpha__ 326 u_long *p, sum; 327 int i; 328 #endif 329 330 if (disable_write) { 331 Warning("write to disk label supressed - label was as follows:"); 332 display(stdout, lp); 333 return (0); 334 } 335 336 lp->d_magic = DISKMAGIC; 337 lp->d_magic2 = DISKMAGIC; 338 lp->d_checksum = 0; 339 lp->d_checksum = dkcksum(lp); 340 if (!rflag) { 341 if (ioctl(f, DIOCWDINFO, lp) < 0) { 342 l_perror("ioctl DIOCWDINFO"); 343 return (1); 344 } 345 return (0); 346 } 347 348 /* 349 * First set the kernel disk label, 350 * then write a label to the raw disk. 351 * If the SDINFO ioctl fails because it is unimplemented, 352 * keep going; otherwise, the kernel consistency checks 353 * may prevent us from changing the current (in-core) 354 * label. 355 */ 356 if (ioctl(f, DIOCSDINFO, lp) < 0 && 357 errno != ENODEV && errno != ENOTTY) { 358 l_perror("ioctl DIOCSDINFO"); 359 return (1); 360 } 361 (void)lseek(f, (off_t)0, SEEK_SET); 362 363 #ifdef __alpha__ 364 /* 365 * Generate the bootblock checksum for the SRM console. 366 */ 367 for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++) 368 sum += p[i]; 369 p[63] = sum; 370 #endif 371 if (ioctl(f, DIOCBSDBB, &boot) == 0) 372 return (0); 373 if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) { 374 warn("write"); 375 return (1); 376 } 377 return (0); 378 } 379 380 void 381 l_perror(const char *s) 382 { 383 switch (errno) { 384 385 case ESRCH: 386 warnx("%s: no disk label on disk;", s); 387 fprintf(stderr, "add \"-r\" to install initial label\n"); 388 break; 389 390 case EINVAL: 391 warnx("%s: label magic number or checksum is wrong!", s); 392 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 393 break; 394 395 case EBUSY: 396 warnx("%s: open partition would move or shrink", s); 397 break; 398 399 case EXDEV: 400 warnx("%s: '%c' partition must start at beginning of disk", 401 s, 'a' + RAW_PART); 402 break; 403 404 default: 405 warn((char *)NULL); 406 break; 407 } 408 } 409 410 /* 411 * Fetch disklabel for disk. 412 * Use ioctl to get label unless -r flag is given. 413 */ 414 struct disklabel * 415 readlabel(int f) 416 { 417 struct disklabel *lp; 418 419 if (rflag) { 420 if (read(f, bootarea, BBSIZE) < BBSIZE) 421 err(4, "%s", specname); 422 for (lp = (struct disklabel *)bootarea; 423 lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp)); 424 lp = (struct disklabel *)((char *)lp + 16)) 425 if (lp->d_magic == DISKMAGIC && 426 lp->d_magic2 == DISKMAGIC) 427 break; 428 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) || 429 lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC || 430 dkcksum(lp) != 0) 431 errx(1, 432 "bad pack magic number (label is damaged, or pack is unlabeled)"); 433 } else { 434 lp = &lab; 435 if (ioctl(f, DIOCGDINFO, lp) < 0) 436 err(4, "ioctl DIOCGDINFO"); 437 } 438 return (lp); 439 } 440 441 /* 442 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 443 * Returns a pointer to the disklabel portion of the bootarea. 444 */ 445 struct disklabel * 446 makebootarea(char *boot, struct disklabel *dp, int f) 447 { 448 struct disklabel *lp; 449 char *p; 450 int b; 451 char *dkbasename; 452 struct stat sb; 453 #ifdef __alpha__ 454 u_long *bootinfo; 455 int n; 456 #endif 457 #ifdef __i386__ 458 char *tmpbuf; 459 int i, found, dps; 460 #endif 461 462 /* XXX */ 463 if (dp->d_secsize == 0) { 464 dp->d_secsize = DEV_BSIZE; 465 dp->d_bbsize = BBSIZE; 466 } 467 lp = (struct disklabel *) 468 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET); 469 bzero((char *)lp, sizeof *lp); 470 /* 471 * If we are not installing a boot program but we are installing a 472 * label on disk then we must read the current bootarea so we don't 473 * clobber the existing boot. 474 */ 475 if (!installboot) { 476 if (rflag) { 477 if (read(f, boot, BBSIZE) < BBSIZE) 478 err(4, "%s", specname); 479 bzero((char *)lp, sizeof *lp); 480 } 481 return (lp); 482 } 483 /* 484 * We are installing a boot program. Determine the name(s) and 485 * read them into the appropriate places in the boot area. 486 */ 487 if (!xxboot) { 488 dkbasename = np; 489 if ((p = rindex(dkname, '/')) == NULL) 490 p = dkname; 491 else 492 p++; 493 while (*p && !isdigit(*p)) 494 *np++ = *p++; 495 *np++ = '\0'; 496 497 if (!xxboot) { 498 (void)sprintf(boot0, "%s/boot", _PATH_BOOTDIR); 499 xxboot = boot0; 500 } 501 } 502 503 b = open(xxboot, O_RDONLY); 504 if (b < 0) 505 err(4, "%s", xxboot); 506 if (fstat(b, &sb) != 0) 507 err(4, "%s", xxboot); 508 #ifdef __i386__ 509 if (sb.st_size > BBSIZE) 510 errx(4, "%s too large", xxboot); 511 /* 512 * XXX Botch alert. 513 * The i386/PC98 has the so-called fdisk table embedded into the 514 * primary bootstrap. We take care to not clobber it, but 515 * only if it does already contain some data. (Otherwise, 516 * the xxboot provides a template.) 517 */ 518 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) 519 err(4, "%s", xxboot); 520 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 521 522 if (read(b, boot, BBSIZE) < 0) 523 err(4, "%s", xxboot); 524 525 /* XXX: rely on some very precise overlaps in definitions */ 526 #ifdef PC98 527 dps = sizeof(struct pc98_partition); 528 #else 529 dps = sizeof(struct dos_partition); 530 #endif 531 for (i = DOSPARTOFF, found = 0; 532 !found && i < (int)(DOSPARTOFF + NDOSPART * dps); 533 i++) 534 found = tmpbuf[i] != 0; 535 if (found) 536 memcpy((void *)&boot[DOSPARTOFF], 537 (void *)&tmpbuf[DOSPARTOFF], 538 NDOSPART * dps); 539 free(tmpbuf); 540 #endif /* __i386__ */ 541 542 #ifdef __alpha__ 543 if (sb.st_size > BBSIZE - dp->d_secsize) 544 errx(4, "%s too large", xxboot); 545 /* 546 * On the alpha, the primary bootstrap starts at the 547 * second sector of the boot area. The first sector 548 * contains the label and must be edited to contain the 549 * size and location of the primary bootstrap. 550 */ 551 n = read(b, boot + dp->d_secsize, BBSIZE - dp->d_secsize); 552 if (n < 0) 553 err(4, "%s", xxboot); 554 bootinfo = (u_long *)(boot + 480); 555 bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize; 556 bootinfo[1] = 1; /* start at sector 1 */ 557 bootinfo[2] = 0; /* flags (must be zero) */ 558 #endif /* __alpha__ */ 559 560 (void)close(b); 561 /* 562 * Make sure no part of the bootstrap is written in the area 563 * reserved for the label. 564 */ 565 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++) 566 if (*p) 567 errx(2, "bootstrap doesn't leave room for disk label"); 568 return (lp); 569 } 570 571 void 572 display(FILE *f, const struct disklabel *lp) 573 { 574 int i, j; 575 const struct partition *pp; 576 577 fprintf(f, "# %s:\n", specname); 578 if (lp->d_type < DKMAXTYPES) 579 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 580 else 581 fprintf(f, "type: %u\n", lp->d_type); 582 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 583 lp->d_typename); 584 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 585 lp->d_packname); 586 fprintf(f, "flags:"); 587 if (lp->d_flags & D_REMOVABLE) 588 fprintf(f, " removeable"); 589 if (lp->d_flags & D_ECC) 590 fprintf(f, " ecc"); 591 if (lp->d_flags & D_BADSECT) 592 fprintf(f, " badsect"); 593 fprintf(f, "\n"); 594 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 595 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 596 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 597 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 598 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 599 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 600 fprintf(f, "rpm: %u\n", lp->d_rpm); 601 fprintf(f, "interleave: %u\n", lp->d_interleave); 602 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 603 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 604 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 605 (u_long)lp->d_headswitch); 606 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 607 (u_long)lp->d_trkseek); 608 fprintf(f, "drivedata: "); 609 for (i = NDDATA - 1; i >= 0; i--) 610 if (lp->d_drivedata[i]) 611 break; 612 if (i < 0) 613 i = 0; 614 for (j = 0; j <= i; j++) 615 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 616 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 617 fprintf(f, 618 "# size offset fstype [fsize bsize bps/cpg]\n"); 619 pp = lp->d_partitions; 620 for (i = 0; i < lp->d_npartitions; i++, pp++) { 621 if (pp->p_size) { 622 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 623 (u_long)pp->p_size, (u_long)pp->p_offset); 624 if (pp->p_fstype < FSMAXTYPES) 625 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 626 else 627 fprintf(f, "%8d", pp->p_fstype); 628 switch (pp->p_fstype) { 629 630 case FS_UNUSED: /* XXX */ 631 fprintf(f, " %5lu %5lu %5.5s ", 632 (u_long)pp->p_fsize, 633 (u_long)(pp->p_fsize * pp->p_frag), ""); 634 break; 635 636 case FS_BSDFFS: 637 fprintf(f, " %5lu %5lu %5u ", 638 (u_long)pp->p_fsize, 639 (u_long)(pp->p_fsize * pp->p_frag), 640 pp->p_cpg); 641 break; 642 643 case FS_BSDLFS: 644 fprintf(f, " %5lu %5lu %5d", 645 (u_long)pp->p_fsize, 646 (u_long)(pp->p_fsize * pp->p_frag), 647 pp->p_cpg); 648 break; 649 650 default: 651 fprintf(f, "%20.20s", ""); 652 break; 653 } 654 fprintf(f, "\t# (Cyl. %4lu", 655 (u_long)(pp->p_offset / lp->d_secpercyl)); 656 if (pp->p_offset % lp->d_secpercyl) 657 putc('*', f); 658 else 659 putc(' ', f); 660 fprintf(f, "- %lu", 661 (u_long)((pp->p_offset + pp->p_size + 662 lp->d_secpercyl - 1) / 663 lp->d_secpercyl - 1)); 664 if (pp->p_size % lp->d_secpercyl) 665 putc('*', f); 666 fprintf(f, ")\n"); 667 } 668 } 669 fflush(f); 670 } 671 672 int 673 edit(struct disklabel *lp, int f) 674 { 675 int c, fd; 676 struct disklabel label; 677 FILE *fp; 678 679 if ((fd = mkstemp(tmpfil)) == -1 || 680 (fp = fdopen(fd, "w")) == NULL) { 681 warnx("can't create %s", tmpfil); 682 return (1); 683 } 684 display(fp, lp); 685 fclose(fp); 686 for (;;) { 687 if (!editit()) 688 break; 689 fp = fopen(tmpfil, "r"); 690 if (fp == NULL) { 691 warnx("can't reopen %s for reading", tmpfil); 692 break; 693 } 694 bzero((char *)&label, sizeof(label)); 695 if (getasciilabel(fp, &label)) { 696 *lp = label; 697 if (writelabel(f, bootarea, lp) == 0) { 698 fclose(fp); 699 (void) unlink(tmpfil); 700 return (0); 701 } 702 } 703 fclose(fp); 704 printf("re-edit the label? [y]: "); fflush(stdout); 705 c = getchar(); 706 if (c != EOF && c != (int)'\n') 707 while (getchar() != (int)'\n') 708 ; 709 if (c == (int)'n') 710 break; 711 } 712 (void) unlink(tmpfil); 713 return (1); 714 } 715 716 int 717 editit(void) 718 { 719 int pid, xpid; 720 int locstat, omask; 721 const char *ed; 722 723 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 724 while ((pid = fork()) < 0) { 725 if (errno == EPROCLIM) { 726 warnx("you have too many processes"); 727 return(0); 728 } 729 if (errno != EAGAIN) { 730 warn("fork"); 731 return(0); 732 } 733 sleep(1); 734 } 735 if (pid == 0) { 736 sigsetmask(omask); 737 setgid(getgid()); 738 setuid(getuid()); 739 if ((ed = getenv("EDITOR")) == (char *)0) 740 ed = DEFEDITOR; 741 execlp(ed, ed, tmpfil, (char *)0); 742 err(1, "%s", ed); 743 } 744 while ((xpid = wait(&locstat)) >= 0) 745 if (xpid == pid) 746 break; 747 sigsetmask(omask); 748 return(!locstat); 749 } 750 751 char * 752 skip(char *cp) 753 { 754 755 while (*cp != '\0' && isspace(*cp)) 756 cp++; 757 if (*cp == '\0' || *cp == '#') 758 return (NULL); 759 return (cp); 760 } 761 762 char * 763 word(char *cp) 764 { 765 char c; 766 767 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 768 cp++; 769 if ((c = *cp) != '\0') { 770 *cp++ = '\0'; 771 if (c != '#') 772 return (skip(cp)); 773 } 774 return (NULL); 775 } 776 777 /* 778 * Read an ascii label in from fd f, 779 * in the same format as that put out by display(), 780 * and fill in lp. 781 */ 782 int 783 getasciilabel(FILE *f, struct disklabel *lp) 784 { 785 char *cp; 786 const char **cpp; 787 u_int part; 788 char *tp, line[BUFSIZ]; 789 u_long v; 790 int lineno = 0, errors = 0; 791 int i; 792 793 bzero(&part_set, sizeof(part_set)); 794 bzero(&part_size_type, sizeof(part_size_type)); 795 bzero(&part_offset_type, sizeof(part_offset_type)); 796 lp->d_bbsize = BBSIZE; /* XXX */ 797 lp->d_sbsize = 0; /* XXX */ 798 while (fgets(line, sizeof(line) - 1, f)) { 799 lineno++; 800 if ((cp = index(line,'\n')) != 0) 801 *cp = '\0'; 802 cp = skip(line); 803 if (cp == NULL) 804 continue; 805 tp = index(cp, ':'); 806 if (tp == NULL) { 807 fprintf(stderr, "line %d: syntax error\n", lineno); 808 errors++; 809 continue; 810 } 811 *tp++ = '\0', tp = skip(tp); 812 if (streq(cp, "type")) { 813 if (tp == NULL) 814 tp = unknown; 815 cpp = dktypenames; 816 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 817 if (*cpp && streq(*cpp, tp)) { 818 lp->d_type = cpp - dktypenames; 819 break; 820 } 821 if (cpp < &dktypenames[DKMAXTYPES]) 822 continue; 823 v = strtoul(tp, NULL, 10); 824 if (v >= DKMAXTYPES) 825 fprintf(stderr, "line %d:%s %lu\n", lineno, 826 "Warning, unknown disk type", v); 827 lp->d_type = v; 828 continue; 829 } 830 if (streq(cp, "flags")) { 831 for (v = 0; (cp = tp) && *cp != '\0';) { 832 tp = word(cp); 833 if (streq(cp, "removeable")) 834 v |= D_REMOVABLE; 835 else if (streq(cp, "ecc")) 836 v |= D_ECC; 837 else if (streq(cp, "badsect")) 838 v |= D_BADSECT; 839 else { 840 fprintf(stderr, 841 "line %d: %s: bad flag\n", 842 lineno, cp); 843 errors++; 844 } 845 } 846 lp->d_flags = v; 847 continue; 848 } 849 if (streq(cp, "drivedata")) { 850 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 851 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 852 tp = word(cp); 853 } 854 continue; 855 } 856 if (sscanf(cp, "%lu partitions", &v) == 1) { 857 if (v == 0 || v > MAXPARTITIONS) { 858 fprintf(stderr, 859 "line %d: bad # of partitions\n", lineno); 860 lp->d_npartitions = MAXPARTITIONS; 861 errors++; 862 } else 863 lp->d_npartitions = v; 864 continue; 865 } 866 if (tp == NULL) 867 tp = blank; 868 if (streq(cp, "disk")) { 869 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 870 continue; 871 } 872 if (streq(cp, "label")) { 873 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 874 continue; 875 } 876 if (streq(cp, "bytes/sector")) { 877 v = strtoul(tp, NULL, 10); 878 if (v == 0 || (v % DEV_BSIZE) != 0) { 879 fprintf(stderr, 880 "line %d: %s: bad sector size\n", 881 lineno, tp); 882 errors++; 883 } else 884 lp->d_secsize = v; 885 continue; 886 } 887 if (streq(cp, "sectors/track")) { 888 v = strtoul(tp, NULL, 10); 889 #if (ULONG_MAX != 0xffffffffUL) 890 if (v == 0 || v > 0xffffffff) { 891 #else 892 if (v == 0) { 893 #endif 894 fprintf(stderr, "line %d: %s: bad %s\n", 895 lineno, tp, cp); 896 errors++; 897 } else 898 lp->d_nsectors = v; 899 continue; 900 } 901 if (streq(cp, "sectors/cylinder")) { 902 v = strtoul(tp, NULL, 10); 903 if (v == 0) { 904 fprintf(stderr, "line %d: %s: bad %s\n", 905 lineno, tp, cp); 906 errors++; 907 } else 908 lp->d_secpercyl = v; 909 continue; 910 } 911 if (streq(cp, "tracks/cylinder")) { 912 v = strtoul(tp, NULL, 10); 913 if (v == 0) { 914 fprintf(stderr, "line %d: %s: bad %s\n", 915 lineno, tp, cp); 916 errors++; 917 } else 918 lp->d_ntracks = v; 919 continue; 920 } 921 if (streq(cp, "cylinders")) { 922 v = strtoul(tp, NULL, 10); 923 if (v == 0) { 924 fprintf(stderr, "line %d: %s: bad %s\n", 925 lineno, tp, cp); 926 errors++; 927 } else 928 lp->d_ncylinders = v; 929 continue; 930 } 931 if (streq(cp, "sectors/unit")) { 932 v = strtoul(tp, NULL, 10); 933 if (v == 0) { 934 fprintf(stderr, "line %d: %s: bad %s\n", 935 lineno, tp, cp); 936 errors++; 937 } else 938 lp->d_secperunit = v; 939 continue; 940 } 941 if (streq(cp, "rpm")) { 942 v = strtoul(tp, NULL, 10); 943 if (v == 0 || v > USHRT_MAX) { 944 fprintf(stderr, "line %d: %s: bad %s\n", 945 lineno, tp, cp); 946 errors++; 947 } else 948 lp->d_rpm = v; 949 continue; 950 } 951 if (streq(cp, "interleave")) { 952 v = strtoul(tp, NULL, 10); 953 if (v == 0 || v > USHRT_MAX) { 954 fprintf(stderr, "line %d: %s: bad %s\n", 955 lineno, tp, cp); 956 errors++; 957 } else 958 lp->d_interleave = v; 959 continue; 960 } 961 if (streq(cp, "trackskew")) { 962 v = strtoul(tp, NULL, 10); 963 if (v > USHRT_MAX) { 964 fprintf(stderr, "line %d: %s: bad %s\n", 965 lineno, tp, cp); 966 errors++; 967 } else 968 lp->d_trackskew = v; 969 continue; 970 } 971 if (streq(cp, "cylinderskew")) { 972 v = strtoul(tp, NULL, 10); 973 if (v > USHRT_MAX) { 974 fprintf(stderr, "line %d: %s: bad %s\n", 975 lineno, tp, cp); 976 errors++; 977 } else 978 lp->d_cylskew = v; 979 continue; 980 } 981 if (streq(cp, "headswitch")) { 982 v = strtoul(tp, NULL, 10); 983 lp->d_headswitch = v; 984 continue; 985 } 986 if (streq(cp, "track-to-track seek")) { 987 v = strtoul(tp, NULL, 10); 988 lp->d_trkseek = v; 989 continue; 990 } 991 /* the ':' was removed above */ 992 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 993 fprintf(stderr, 994 "line %d: %s: Unknown disklabel field\n", lineno, 995 cp); 996 errors++; 997 continue; 998 } 999 1000 /* Process a partition specification line. */ 1001 part = *cp - 'a'; 1002 if (part >= lp->d_npartitions) { 1003 fprintf(stderr, 1004 "line %d: partition name out of range a-%c: %s\n", 1005 lineno, 'a' + lp->d_npartitions - 1, cp); 1006 errors++; 1007 continue; 1008 } 1009 part_set[part] = 1; 1010 1011 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1012 errors++; 1013 break; 1014 } 1015 } 1016 errors += checklabel(lp); 1017 return (errors == 0); 1018 } 1019 1020 #define NXTNUM(n) do { \ 1021 if (tp == NULL) { \ 1022 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1023 return (1); \ 1024 } else { \ 1025 cp = tp, tp = word(cp); \ 1026 (n) = strtoul(cp, NULL, 10); \ 1027 } \ 1028 } while (0) 1029 1030 /* retain 1 character following number */ 1031 #define NXTWORD(w,n) do { \ 1032 if (tp == NULL) { \ 1033 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1034 return (1); \ 1035 } else { \ 1036 char *tmp; \ 1037 cp = tp, tp = word(cp); \ 1038 (n) = strtoul(cp, &tmp, 10); \ 1039 if (tmp) (w) = *tmp; \ 1040 } \ 1041 } while (0) 1042 1043 /* 1044 * Read a partition line into partition `part' in the specified disklabel. 1045 * Return 0 on success, 1 on failure. 1046 */ 1047 int 1048 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1049 { 1050 struct partition *pp; 1051 char *cp; 1052 const char **cpp; 1053 u_long v; 1054 1055 pp = &lp->d_partitions[part]; 1056 cp = NULL; 1057 1058 v = 0; 1059 NXTWORD(part_size_type[part],v); 1060 if (v == 0 && part_size_type[part] != '*') { 1061 fprintf(stderr, 1062 "line %d: %s: bad partition size\n", lineno, cp); 1063 return (1); 1064 } 1065 pp->p_size = v; 1066 1067 v = 0; 1068 NXTWORD(part_offset_type[part],v); 1069 if (v == 0 && part_offset_type[part] != '*' && 1070 part_offset_type[part] != '\0') { 1071 fprintf(stderr, 1072 "line %d: %s: bad partition offset\n", lineno, cp); 1073 return (1); 1074 } 1075 pp->p_offset = v; 1076 cp = tp, tp = word(cp); 1077 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1078 if (*cpp && streq(*cpp, cp)) 1079 break; 1080 if (*cpp != NULL) { 1081 pp->p_fstype = cpp - fstypenames; 1082 } else { 1083 if (isdigit(*cp)) 1084 v = strtoul(cp, NULL, 10); 1085 else 1086 v = FSMAXTYPES; 1087 if (v >= FSMAXTYPES) { 1088 fprintf(stderr, 1089 "line %d: Warning, unknown file system type %s\n", 1090 lineno, cp); 1091 v = FS_UNUSED; 1092 } 1093 pp->p_fstype = v; 1094 } 1095 1096 switch (pp->p_fstype) { 1097 case FS_UNUSED: 1098 /* 1099 * allow us to accept defaults for 1100 * fsize/frag/cpg 1101 */ 1102 if (tp) { 1103 NXTNUM(pp->p_fsize); 1104 if (pp->p_fsize == 0) 1105 break; 1106 NXTNUM(v); 1107 pp->p_frag = v / pp->p_fsize; 1108 } 1109 /* else default to 0's */ 1110 break; 1111 1112 /* These happen to be the same */ 1113 case FS_BSDFFS: 1114 case FS_BSDLFS: 1115 if (tp) { 1116 NXTNUM(pp->p_fsize); 1117 if (pp->p_fsize == 0) 1118 break; 1119 NXTNUM(v); 1120 pp->p_frag = v / pp->p_fsize; 1121 NXTNUM(pp->p_cpg); 1122 } else { 1123 /* 1124 * FIX! poor attempt at adaptive 1125 */ 1126 /* 1 GB */ 1127 if (pp->p_size < 1024*1024*1024 / lp->d_secsize) { 1128 /* 1129 * FIX! These are too low, but are traditional 1130 */ 1131 pp->p_fsize = DEFAULT_NEWFS_FRAG; 1132 pp->p_frag = DEFAULT_NEWFS_BLOCK / 1133 DEFAULT_NEWFS_FRAG; 1134 pp->p_cpg = DEFAULT_NEWFS_CPG; 1135 } else { 1136 pp->p_fsize = BIG_NEWFS_FRAG; 1137 pp->p_frag = BIG_NEWFS_BLOCK / 1138 BIG_NEWFS_FRAG; 1139 pp->p_cpg = BIG_NEWFS_CPG; 1140 } 1141 } 1142 default: 1143 break; 1144 } 1145 return (0); 1146 } 1147 1148 /* 1149 * Check disklabel for errors and fill in 1150 * derived fields according to supplied values. 1151 */ 1152 int 1153 checklabel(struct disklabel *lp) 1154 { 1155 struct partition *pp; 1156 int i, errors = 0; 1157 char part; 1158 u_long total_size, total_percent, current_offset; 1159 int seen_default_offset; 1160 int hog_part; 1161 int j; 1162 struct partition *pp2; 1163 1164 if (lp->d_secsize == 0) { 1165 fprintf(stderr, "sector size 0\n"); 1166 return (1); 1167 } 1168 if (lp->d_nsectors == 0) { 1169 fprintf(stderr, "sectors/track 0\n"); 1170 return (1); 1171 } 1172 if (lp->d_ntracks == 0) { 1173 fprintf(stderr, "tracks/cylinder 0\n"); 1174 return (1); 1175 } 1176 if (lp->d_ncylinders == 0) { 1177 fprintf(stderr, "cylinders/unit 0\n"); 1178 errors++; 1179 } 1180 if (lp->d_rpm == 0) 1181 Warning("revolutions/minute 0"); 1182 if (lp->d_secpercyl == 0) 1183 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1184 if (lp->d_secperunit == 0) 1185 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1186 if (lp->d_bbsize == 0) { 1187 fprintf(stderr, "boot block size 0\n"); 1188 errors++; 1189 } else if (lp->d_bbsize % lp->d_secsize) 1190 Warning("boot block size %% sector-size != 0"); 1191 if (lp->d_npartitions > MAXPARTITIONS) 1192 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", 1193 (u_long)lp->d_npartitions, MAXPARTITIONS); 1194 1195 /* first allocate space to the partitions, then offsets */ 1196 total_size = 0; /* in sectors */ 1197 total_percent = 0; /* in percent */ 1198 hog_part = -1; 1199 /* find all fixed partitions */ 1200 for (i = 0; i < lp->d_npartitions; i++) { 1201 pp = &lp->d_partitions[i]; 1202 if (part_set[i]) { 1203 if (part_size_type[i] == '*') { 1204 if (i == RAW_PART) { 1205 pp->p_size = lp->d_secperunit; 1206 } else { 1207 if (hog_part != -1) 1208 Warning("Too many '*' partitions (%c and %c)", 1209 hog_part + 'a',i + 'a'); 1210 else 1211 hog_part = i; 1212 } 1213 } else { 1214 off_t size; 1215 1216 size = pp->p_size; 1217 switch (part_size_type[i]) { 1218 case '%': 1219 total_percent += size; 1220 break; 1221 case 'k': 1222 case 'K': 1223 size *= 1024ULL; 1224 break; 1225 case 'm': 1226 case 'M': 1227 size *= 1024ULL * 1024ULL; 1228 break; 1229 case 'g': 1230 case 'G': 1231 size *= 1024ULL * 1024ULL * 1024ULL; 1232 break; 1233 case '\0': 1234 break; 1235 default: 1236 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1237 break; 1238 } 1239 /* don't count %'s yet */ 1240 if (part_size_type[i] != '%') { 1241 /* 1242 * for all not in sectors, convert to 1243 * sectors 1244 */ 1245 if (part_size_type[i] != '\0') { 1246 if (size % lp->d_secsize != 0) 1247 Warning("partition %c not an integer number of sectors", 1248 i + 'a'); 1249 size /= lp->d_secsize; 1250 pp->p_size = size; 1251 } 1252 /* else already in sectors */ 1253 if (i != RAW_PART) 1254 total_size += size; 1255 } 1256 } 1257 } 1258 } 1259 /* handle % partitions - note %'s don't need to add up to 100! */ 1260 if (total_percent != 0) { 1261 long free_space = lp->d_secperunit - total_size; 1262 if (total_percent > 100) { 1263 fprintf(stderr,"total percentage %lu is greater than 100\n", 1264 total_percent); 1265 errors++; 1266 } 1267 1268 if (free_space > 0) { 1269 for (i = 0; i < lp->d_npartitions; i++) { 1270 pp = &lp->d_partitions[i]; 1271 if (part_set[i] && part_size_type[i] == '%') { 1272 /* careful of overflows! and integer roundoff */ 1273 pp->p_size = ((double)pp->p_size/100) * free_space; 1274 total_size += pp->p_size; 1275 1276 /* FIX we can lose a sector or so due to roundoff per 1277 partition. A more complex algorithm could avoid that */ 1278 } 1279 } 1280 } else { 1281 fprintf(stderr, 1282 "%ld sectors available to give to '*' and '%%' partitions\n", 1283 free_space); 1284 errors++; 1285 /* fix? set all % partitions to size 0? */ 1286 } 1287 } 1288 /* give anything remaining to the hog partition */ 1289 if (hog_part != -1) { 1290 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; 1291 total_size = lp->d_secperunit; 1292 } 1293 1294 /* Now set the offsets for each partition */ 1295 current_offset = 0; /* in sectors */ 1296 seen_default_offset = 0; 1297 for (i = 0; i < lp->d_npartitions; i++) { 1298 part = 'a' + i; 1299 pp = &lp->d_partitions[i]; 1300 if (part_set[i]) { 1301 if (part_offset_type[i] == '*') { 1302 if (i == RAW_PART) { 1303 pp->p_offset = 0; 1304 } else { 1305 pp->p_offset = current_offset; 1306 seen_default_offset = 1; 1307 } 1308 } else { 1309 /* allow them to be out of order for old-style tables */ 1310 if (pp->p_offset < current_offset && 1311 seen_default_offset && i != RAW_PART && 1312 pp->p_fstype != FS_VINUM) { 1313 fprintf(stderr, 1314 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1315 (long)pp->p_offset,i+'a',current_offset); 1316 fprintf(stderr, 1317 "Labels with any *'s for offset must be in ascending order by sector\n"); 1318 errors++; 1319 } else if (pp->p_offset != current_offset && 1320 i != RAW_PART && seen_default_offset) { 1321 /* 1322 * this may give unneeded warnings if 1323 * partitions are out-of-order 1324 */ 1325 Warning( 1326 "Offset %ld for partition %c doesn't match expected value %ld", 1327 (long)pp->p_offset, i + 'a', current_offset); 1328 } 1329 } 1330 if (i != RAW_PART) 1331 current_offset = pp->p_offset + pp->p_size; 1332 } 1333 } 1334 1335 for (i = 0; i < lp->d_npartitions; i++) { 1336 part = 'a' + i; 1337 pp = &lp->d_partitions[i]; 1338 if (pp->p_size == 0 && pp->p_offset != 0) 1339 Warning("partition %c: size 0, but offset %lu", 1340 part, (u_long)pp->p_offset); 1341 #ifdef notdef 1342 if (pp->p_size % lp->d_secpercyl) 1343 Warning("partition %c: size %% cylinder-size != 0", 1344 part); 1345 if (pp->p_offset % lp->d_secpercyl) 1346 Warning("partition %c: offset %% cylinder-size != 0", 1347 part); 1348 #endif 1349 if (pp->p_offset > lp->d_secperunit) { 1350 fprintf(stderr, 1351 "partition %c: offset past end of unit\n", part); 1352 errors++; 1353 } 1354 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1355 fprintf(stderr, 1356 "partition %c: partition extends past end of unit\n", 1357 part); 1358 errors++; 1359 } 1360 if (i == RAW_PART) 1361 { 1362 if (pp->p_fstype != FS_UNUSED) 1363 Warning("partition %c is not marked as unused!",part); 1364 if (pp->p_offset != 0) 1365 Warning("partition %c doesn't start at 0!",part); 1366 if (pp->p_size != lp->d_secperunit) 1367 Warning("partition %c doesn't cover the whole unit!",part); 1368 1369 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1370 (pp->p_size != lp->d_secperunit)) { 1371 Warning("An incorrect partition %c may cause problems for " 1372 "standard system utilities",part); 1373 } 1374 } 1375 1376 /* check for overlaps */ 1377 /* this will check for all possible overlaps once and only once */ 1378 for (j = 0; j < i; j++) { 1379 pp2 = &lp->d_partitions[j]; 1380 if (j != RAW_PART && i != RAW_PART && 1381 pp->p_fstype != FS_VINUM && 1382 pp2->p_fstype != FS_VINUM && 1383 part_set[i] && part_set[j]) { 1384 if (pp2->p_offset < pp->p_offset + pp->p_size && 1385 (pp2->p_offset + pp2->p_size > pp->p_offset || 1386 pp2->p_offset >= pp->p_offset)) { 1387 fprintf(stderr,"partitions %c and %c overlap!\n", 1388 j + 'a', i + 'a'); 1389 errors++; 1390 } 1391 } 1392 } 1393 } 1394 for (; i < MAXPARTITIONS; i++) { 1395 part = 'a' + i; 1396 pp = &lp->d_partitions[i]; 1397 if (pp->p_size || pp->p_offset) 1398 Warning("unused partition %c: size %d offset %lu", 1399 'a' + i, pp->p_size, (u_long)pp->p_offset); 1400 } 1401 return (errors); 1402 } 1403 1404 /* 1405 * When operating on a "virgin" disk, try getting an initial label 1406 * from the associated device driver. This might work for all device 1407 * drivers that are able to fetch some initial device parameters 1408 * without even having access to a (BSD) disklabel, like SCSI disks, 1409 * most IDE drives, or vn devices. 1410 * 1411 * The device name must be given in its "canonical" form. 1412 */ 1413 struct disklabel * 1414 getvirginlabel(void) 1415 { 1416 static struct disklabel loclab; 1417 struct partition *dp; 1418 char lnamebuf[BBSIZE]; 1419 int f; 1420 u_int secsize, u; 1421 off_t mediasize; 1422 1423 if (dkname[0] == '/') { 1424 warnx("\"auto\" requires the usage of a canonical disk name"); 1425 return (NULL); 1426 } 1427 (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname); 1428 if ((f = open(lnamebuf, O_RDONLY)) == -1) { 1429 warn("cannot open %s", lnamebuf); 1430 return (NULL); 1431 } 1432 1433 /* New world order */ 1434 if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || 1435 (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { 1436 close (f); 1437 return (NULL); 1438 } 1439 memset(&loclab, 0, sizeof loclab); 1440 loclab.d_magic = DISKMAGIC; 1441 loclab.d_magic2 = DISKMAGIC; 1442 loclab.d_secsize = secsize; 1443 loclab.d_secperunit = mediasize / secsize; 1444 1445 /* 1446 * Nobody in these enligthened days uses the CHS geometry for 1447 * anything, but nontheless try to get it right. If we fail 1448 * to get any good ideas from the device, construct something 1449 * which is IBM-PC friendly. 1450 */ 1451 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1452 loclab.d_nsectors = u; 1453 else 1454 loclab.d_nsectors = 63; 1455 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1456 loclab.d_ntracks = u; 1457 else if (loclab.d_secperunit <= 63*1*1024) 1458 loclab.d_ntracks = 1; 1459 else if (loclab.d_secperunit <= 63*16*1024) 1460 loclab.d_ntracks = 16; 1461 else 1462 loclab.d_ntracks = 255; 1463 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1464 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1465 loclab.d_npartitions = MAXPARTITIONS; 1466 1467 /* Various (unneeded) compat stuff */ 1468 loclab.d_rpm = 3600; 1469 loclab.d_bbsize = BBSIZE; 1470 loclab.d_interleave = 1;; 1471 strncpy(loclab.d_typename, "amnesiac", 1472 sizeof(loclab.d_typename)); 1473 1474 dp = &loclab.d_partitions[RAW_PART]; 1475 dp->p_size = loclab.d_secperunit; 1476 loclab.d_checksum = dkcksum(&loclab); 1477 close (f); 1478 return (&loclab); 1479 } 1480 1481 1482 /*VARARGS1*/ 1483 void 1484 Warning(const char *fmt, ...) 1485 { 1486 va_list ap; 1487 1488 fprintf(stderr, "Warning, "); 1489 va_start(ap, fmt); 1490 vfprintf(stderr, fmt, ap); 1491 fprintf(stderr, "\n"); 1492 va_end(ap); 1493 } 1494 1495 void 1496 usage(void) 1497 { 1498 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", 1499 "usage: disklabel [-r] disk", 1500 "\t\t(to read label)", 1501 " disklabel -w [-r] [-n] disk type [ packid ]", 1502 "\t\t(to write label with existing boot program)", 1503 " disklabel -e [-r] [-n] disk", 1504 "\t\t(to edit label)", 1505 " disklabel -R [-r] [-n] disk protofile", 1506 "\t\t(to restore label with existing boot program)", 1507 " disklabel -B [-n] [ -b bootprog ] disk [ type ]", 1508 "\t\t(to install boot program with existing on-disk label)", 1509 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]", 1510 "\t\t(to write label and install boot program)", 1511 " disklabel -R -B [-n] [ -b bootprog ] disk protofile", 1512 "\t\t(to restore label and install boot program)" 1513 ); 1514 exit(1); 1515 } 1516