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 (installboot && argc == 3) { 260 makelabel(argv[2], 0, &lab); 261 argc--; 262 263 /* 264 * We only called makelabel() for its side effect 265 * of setting the bootstrap file names. Discard 266 * all changes to `lab' so that all values in the 267 * final label come from the ASCII label. 268 */ 269 bzero((char *)&lab, sizeof(lab)); 270 } 271 if (argc != 2) 272 usage(); 273 if (!(t = fopen(argv[1], "r"))) 274 err(4, "%s", argv[1]); 275 if (!getasciilabel(t, &lab)) 276 exit(1); 277 lp = makebootarea(bootarea, &lab, f); 278 *lp = lab; 279 error = writelabel(f, bootarea, lp); 280 break; 281 282 case WRITE: 283 if (argc == 3) { 284 name = argv[2]; 285 argc--; 286 } 287 if (argc != 2) 288 usage(); 289 makelabel(argv[1], name, &lab); 290 lp = makebootarea(bootarea, &lab, f); 291 *lp = lab; 292 if (checklabel(lp) == 0) 293 error = writelabel(f, bootarea, lp); 294 break; 295 296 case WRITEBOOT: 297 { 298 struct disklabel tlab; 299 300 lp = readlabel(f); 301 tlab = *lp; 302 if (argc == 2) 303 makelabel(argv[1], 0, &lab); 304 lp = makebootarea(bootarea, &lab, f); 305 *lp = tlab; 306 if (checklabel(lp) == 0) 307 error = writelabel(f, bootarea, lp); 308 break; 309 } 310 } 311 exit(error); 312 } 313 314 /* 315 * Construct a prototype disklabel from /etc/disktab. As a side 316 * effect, set the names of the primary and secondary boot files 317 * if specified. 318 */ 319 void 320 makelabel(const char *type, const char *name, struct disklabel *lp) 321 { 322 struct disklabel *dp; 323 324 if (strcmp(type, "auto") == 0) 325 dp = getvirginlabel(); 326 else 327 dp = getdiskbyname(type); 328 if (dp == NULL) 329 errx(1, "%s: unknown disk type", type); 330 *lp = *dp; 331 bzero(lp->d_packname, sizeof(lp->d_packname)); 332 if (name) 333 (void)strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 334 } 335 336 int 337 writelabel(int f, const char *boot, struct disklabel *lp) 338 { 339 #ifdef __alpha__ 340 u_long *p, sum; 341 int i; 342 #endif 343 344 if (disable_write) { 345 Warning("write to disk label supressed - label was as follows:"); 346 display(stdout, lp); 347 return (0); 348 } 349 350 lp->d_magic = DISKMAGIC; 351 lp->d_magic2 = DISKMAGIC; 352 lp->d_checksum = 0; 353 lp->d_checksum = dkcksum(lp); 354 if (!rflag) { 355 if (ioctl(f, DIOCWDINFO, lp) < 0) { 356 l_perror("ioctl DIOCWDINFO"); 357 return (1); 358 } 359 return (0); 360 } 361 362 /* 363 * First set the kernel disk label, 364 * then write a label to the raw disk. 365 * If the SDINFO ioctl fails because it is unimplemented, 366 * keep going; otherwise, the kernel consistency checks 367 * may prevent us from changing the current (in-core) 368 * label. 369 */ 370 if (ioctl(f, DIOCSDINFO, lp) < 0 && 371 errno != ENODEV && errno != ENOTTY) { 372 l_perror("ioctl DIOCSDINFO"); 373 return (1); 374 } 375 (void)lseek(f, (off_t)0, SEEK_SET); 376 377 #ifdef __alpha__ 378 /* 379 * Generate the bootblock checksum for the SRM console. 380 */ 381 for (p = (u_long *)boot, i = 0, sum = 0; i < 63; i++) 382 sum += p[i]; 383 p[63] = sum; 384 #endif 385 if (ioctl(f, DIOCBSDBB, &boot) == 0) 386 return (0); 387 if (write(f, boot, lp->d_bbsize) != (int)lp->d_bbsize) { 388 warn("write"); 389 return (1); 390 } 391 return (0); 392 } 393 394 void 395 l_perror(const char *s) 396 { 397 switch (errno) { 398 399 case ESRCH: 400 warnx("%s: no disk label on disk;", s); 401 fprintf(stderr, "add \"-r\" to install initial label\n"); 402 break; 403 404 case EINVAL: 405 warnx("%s: label magic number or checksum is wrong!", s); 406 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 407 break; 408 409 case EBUSY: 410 warnx("%s: open partition would move or shrink", s); 411 break; 412 413 case EXDEV: 414 warnx("%s: '%c' partition must start at beginning of disk", 415 s, 'a' + RAW_PART); 416 break; 417 418 default: 419 warn((char *)NULL); 420 break; 421 } 422 } 423 424 /* 425 * Fetch disklabel for disk. 426 * Use ioctl to get label unless -r flag is given. 427 */ 428 struct disklabel * 429 readlabel(int f) 430 { 431 struct disklabel *lp; 432 433 if (rflag) { 434 if (read(f, bootarea, BBSIZE) < BBSIZE) 435 err(4, "%s", specname); 436 for (lp = (struct disklabel *)bootarea; 437 lp <= (struct disklabel *)(bootarea + BBSIZE - sizeof(*lp)); 438 lp = (struct disklabel *)((char *)lp + 16)) 439 if (lp->d_magic == DISKMAGIC && 440 lp->d_magic2 == DISKMAGIC) 441 break; 442 if (lp > (struct disklabel *)(bootarea+BBSIZE-sizeof(*lp)) || 443 lp->d_magic != DISKMAGIC || lp->d_magic2 != DISKMAGIC || 444 dkcksum(lp) != 0) 445 errx(1, 446 "bad pack magic number (label is damaged, or pack is unlabeled)"); 447 } else { 448 lp = &lab; 449 if (ioctl(f, DIOCGDINFO, lp) < 0) 450 err(4, "ioctl DIOCGDINFO"); 451 } 452 return (lp); 453 } 454 455 /* 456 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 457 * Returns a pointer to the disklabel portion of the bootarea. 458 */ 459 struct disklabel * 460 makebootarea(char *boot, struct disklabel *dp, int f) 461 { 462 struct disklabel *lp; 463 char *p; 464 int b; 465 char *dkbasename; 466 struct stat sb; 467 #ifdef __alpha__ 468 u_long *bootinfo; 469 int n; 470 #endif 471 #ifdef __i386__ 472 char *tmpbuf; 473 int i, found, dps; 474 #endif 475 476 /* XXX */ 477 if (dp->d_secsize == 0) { 478 dp->d_secsize = DEV_BSIZE; 479 dp->d_bbsize = BBSIZE; 480 } 481 lp = (struct disklabel *) 482 (boot + (LABELSECTOR * dp->d_secsize) + LABELOFFSET); 483 bzero((char *)lp, sizeof *lp); 484 /* 485 * If we are not installing a boot program but we are installing a 486 * label on disk then we must read the current bootarea so we don't 487 * clobber the existing boot. 488 */ 489 if (!installboot) { 490 if (rflag) { 491 if (read(f, boot, BBSIZE) < BBSIZE) 492 err(4, "%s", specname); 493 bzero((char *)lp, sizeof *lp); 494 } 495 return (lp); 496 } 497 /* 498 * We are installing a boot program. Determine the name(s) and 499 * read them into the appropriate places in the boot area. 500 */ 501 if (!xxboot) { 502 dkbasename = np; 503 if ((p = rindex(dkname, '/')) == NULL) 504 p = dkname; 505 else 506 p++; 507 while (*p && !isdigit(*p)) 508 *np++ = *p++; 509 *np++ = '\0'; 510 511 if (!xxboot) { 512 (void)sprintf(boot0, "%s/boot", _PATH_BOOTDIR); 513 xxboot = boot0; 514 } 515 } 516 517 b = open(xxboot, O_RDONLY); 518 if (b < 0) 519 err(4, "%s", xxboot); 520 if (fstat(b, &sb) != 0) 521 err(4, "%s", xxboot); 522 #ifdef __i386__ 523 if (sb.st_size > BBSIZE) 524 errx(4, "%s too large", xxboot); 525 /* 526 * XXX Botch alert. 527 * The i386/PC98 has the so-called fdisk table embedded into the 528 * primary bootstrap. We take care to not clobber it, but 529 * only if it does already contain some data. (Otherwise, 530 * the xxboot provides a template.) 531 */ 532 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) 533 err(4, "%s", xxboot); 534 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 535 536 if (read(b, boot, BBSIZE) < 0) 537 err(4, "%s", xxboot); 538 539 /* XXX: rely on some very precise overlaps in definitions */ 540 #ifdef PC98 541 dps = sizeof(struct pc98_partition); 542 #else 543 dps = sizeof(struct dos_partition); 544 #endif 545 for (i = DOSPARTOFF, found = 0; 546 !found && i < (int)(DOSPARTOFF + NDOSPART * dps); 547 i++) 548 found = tmpbuf[i] != 0; 549 if (found) 550 memcpy((void *)&boot[DOSPARTOFF], 551 (void *)&tmpbuf[DOSPARTOFF], 552 NDOSPART * dps); 553 free(tmpbuf); 554 #endif /* __i386__ */ 555 556 #ifdef __alpha__ 557 if (sb.st_size > BBSIZE - dp->d_secsize) 558 errx(4, "%s too large", xxboot); 559 /* 560 * On the alpha, the primary bootstrap starts at the 561 * second sector of the boot area. The first sector 562 * contains the label and must be edited to contain the 563 * size and location of the primary bootstrap. 564 */ 565 n = read(b, boot + dp->d_secsize, BBSIZE - dp->d_secsize); 566 if (n < 0) 567 err(4, "%s", xxboot); 568 bootinfo = (u_long *)(boot + 480); 569 bootinfo[0] = (n + dp->d_secsize - 1) / dp->d_secsize; 570 bootinfo[1] = 1; /* start at sector 1 */ 571 bootinfo[2] = 0; /* flags (must be zero) */ 572 #endif /* __alpha__ */ 573 574 (void)close(b); 575 /* 576 * Make sure no part of the bootstrap is written in the area 577 * reserved for the label. 578 */ 579 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel); p++) 580 if (*p) 581 errx(2, "bootstrap doesn't leave room for disk label"); 582 return (lp); 583 } 584 585 void 586 display(FILE *f, const struct disklabel *lp) 587 { 588 int i, j; 589 const struct partition *pp; 590 591 fprintf(f, "# %s:\n", specname); 592 if (lp->d_type < DKMAXTYPES) 593 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 594 else 595 fprintf(f, "type: %u\n", lp->d_type); 596 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 597 lp->d_typename); 598 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 599 lp->d_packname); 600 fprintf(f, "flags:"); 601 if (lp->d_flags & D_REMOVABLE) 602 fprintf(f, " removeable"); 603 if (lp->d_flags & D_ECC) 604 fprintf(f, " ecc"); 605 if (lp->d_flags & D_BADSECT) 606 fprintf(f, " badsect"); 607 fprintf(f, "\n"); 608 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 609 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 610 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 611 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 612 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 613 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 614 fprintf(f, "rpm: %u\n", lp->d_rpm); 615 fprintf(f, "interleave: %u\n", lp->d_interleave); 616 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 617 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 618 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 619 (u_long)lp->d_headswitch); 620 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 621 (u_long)lp->d_trkseek); 622 fprintf(f, "drivedata: "); 623 for (i = NDDATA - 1; i >= 0; i--) 624 if (lp->d_drivedata[i]) 625 break; 626 if (i < 0) 627 i = 0; 628 for (j = 0; j <= i; j++) 629 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 630 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 631 fprintf(f, 632 "# size offset fstype [fsize bsize bps/cpg]\n"); 633 pp = lp->d_partitions; 634 for (i = 0; i < lp->d_npartitions; i++, pp++) { 635 if (pp->p_size) { 636 fprintf(f, " %c: %8lu %8lu ", 'a' + i, 637 (u_long)pp->p_size, (u_long)pp->p_offset); 638 if (pp->p_fstype < FSMAXTYPES) 639 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 640 else 641 fprintf(f, "%8d", pp->p_fstype); 642 switch (pp->p_fstype) { 643 644 case FS_UNUSED: /* XXX */ 645 fprintf(f, " %5lu %5lu %5.5s ", 646 (u_long)pp->p_fsize, 647 (u_long)(pp->p_fsize * pp->p_frag), ""); 648 break; 649 650 case FS_BSDFFS: 651 fprintf(f, " %5lu %5lu %5u ", 652 (u_long)pp->p_fsize, 653 (u_long)(pp->p_fsize * pp->p_frag), 654 pp->p_cpg); 655 break; 656 657 case FS_BSDLFS: 658 fprintf(f, " %5lu %5lu %5d", 659 (u_long)pp->p_fsize, 660 (u_long)(pp->p_fsize * pp->p_frag), 661 pp->p_cpg); 662 break; 663 664 default: 665 fprintf(f, "%20.20s", ""); 666 break; 667 } 668 fprintf(f, "\t# (Cyl. %4lu", 669 (u_long)(pp->p_offset / lp->d_secpercyl)); 670 if (pp->p_offset % lp->d_secpercyl) 671 putc('*', f); 672 else 673 putc(' ', f); 674 fprintf(f, "- %lu", 675 (u_long)((pp->p_offset + pp->p_size + 676 lp->d_secpercyl - 1) / 677 lp->d_secpercyl - 1)); 678 if (pp->p_size % lp->d_secpercyl) 679 putc('*', f); 680 fprintf(f, ")\n"); 681 } 682 } 683 fflush(f); 684 } 685 686 int 687 edit(struct disklabel *lp, int f) 688 { 689 int c, fd; 690 struct disklabel label; 691 FILE *fp; 692 693 if ((fd = mkstemp(tmpfil)) == -1 || 694 (fp = fdopen(fd, "w")) == NULL) { 695 warnx("can't create %s", tmpfil); 696 return (1); 697 } 698 display(fp, lp); 699 fclose(fp); 700 for (;;) { 701 if (!editit()) 702 break; 703 fp = fopen(tmpfil, "r"); 704 if (fp == NULL) { 705 warnx("can't reopen %s for reading", tmpfil); 706 break; 707 } 708 bzero((char *)&label, sizeof(label)); 709 if (getasciilabel(fp, &label)) { 710 *lp = label; 711 if (writelabel(f, bootarea, lp) == 0) { 712 fclose(fp); 713 (void) unlink(tmpfil); 714 return (0); 715 } 716 } 717 fclose(fp); 718 printf("re-edit the label? [y]: "); fflush(stdout); 719 c = getchar(); 720 if (c != EOF && c != (int)'\n') 721 while (getchar() != (int)'\n') 722 ; 723 if (c == (int)'n') 724 break; 725 } 726 (void) unlink(tmpfil); 727 return (1); 728 } 729 730 int 731 editit(void) 732 { 733 int pid, xpid; 734 int locstat, omask; 735 const char *ed; 736 737 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 738 while ((pid = fork()) < 0) { 739 if (errno == EPROCLIM) { 740 warnx("you have too many processes"); 741 return(0); 742 } 743 if (errno != EAGAIN) { 744 warn("fork"); 745 return(0); 746 } 747 sleep(1); 748 } 749 if (pid == 0) { 750 sigsetmask(omask); 751 setgid(getgid()); 752 setuid(getuid()); 753 if ((ed = getenv("EDITOR")) == (char *)0) 754 ed = DEFEDITOR; 755 execlp(ed, ed, tmpfil, (char *)0); 756 err(1, "%s", ed); 757 } 758 while ((xpid = wait(&locstat)) >= 0) 759 if (xpid == pid) 760 break; 761 sigsetmask(omask); 762 return(!locstat); 763 } 764 765 char * 766 skip(char *cp) 767 { 768 769 while (*cp != '\0' && isspace(*cp)) 770 cp++; 771 if (*cp == '\0' || *cp == '#') 772 return (NULL); 773 return (cp); 774 } 775 776 char * 777 word(char *cp) 778 { 779 char c; 780 781 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 782 cp++; 783 if ((c = *cp) != '\0') { 784 *cp++ = '\0'; 785 if (c != '#') 786 return (skip(cp)); 787 } 788 return (NULL); 789 } 790 791 /* 792 * Read an ascii label in from fd f, 793 * in the same format as that put out by display(), 794 * and fill in lp. 795 */ 796 int 797 getasciilabel(FILE *f, struct disklabel *lp) 798 { 799 char *cp; 800 const char **cpp; 801 u_int part; 802 char *tp, line[BUFSIZ]; 803 u_long v; 804 int lineno = 0, errors = 0; 805 int i; 806 807 bzero(&part_set, sizeof(part_set)); 808 bzero(&part_size_type, sizeof(part_size_type)); 809 bzero(&part_offset_type, sizeof(part_offset_type)); 810 lp->d_bbsize = BBSIZE; /* XXX */ 811 lp->d_sbsize = 0; /* XXX */ 812 while (fgets(line, sizeof(line) - 1, f)) { 813 lineno++; 814 if ((cp = index(line,'\n')) != 0) 815 *cp = '\0'; 816 cp = skip(line); 817 if (cp == NULL) 818 continue; 819 tp = index(cp, ':'); 820 if (tp == NULL) { 821 fprintf(stderr, "line %d: syntax error\n", lineno); 822 errors++; 823 continue; 824 } 825 *tp++ = '\0', tp = skip(tp); 826 if (streq(cp, "type")) { 827 if (tp == NULL) 828 tp = unknown; 829 cpp = dktypenames; 830 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 831 if (*cpp && streq(*cpp, tp)) { 832 lp->d_type = cpp - dktypenames; 833 break; 834 } 835 if (cpp < &dktypenames[DKMAXTYPES]) 836 continue; 837 v = strtoul(tp, NULL, 10); 838 if (v >= DKMAXTYPES) 839 fprintf(stderr, "line %d:%s %lu\n", lineno, 840 "Warning, unknown disk type", v); 841 lp->d_type = v; 842 continue; 843 } 844 if (streq(cp, "flags")) { 845 for (v = 0; (cp = tp) && *cp != '\0';) { 846 tp = word(cp); 847 if (streq(cp, "removeable")) 848 v |= D_REMOVABLE; 849 else if (streq(cp, "ecc")) 850 v |= D_ECC; 851 else if (streq(cp, "badsect")) 852 v |= D_BADSECT; 853 else { 854 fprintf(stderr, 855 "line %d: %s: bad flag\n", 856 lineno, cp); 857 errors++; 858 } 859 } 860 lp->d_flags = v; 861 continue; 862 } 863 if (streq(cp, "drivedata")) { 864 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 865 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 866 tp = word(cp); 867 } 868 continue; 869 } 870 if (sscanf(cp, "%lu partitions", &v) == 1) { 871 if (v == 0 || v > MAXPARTITIONS) { 872 fprintf(stderr, 873 "line %d: bad # of partitions\n", lineno); 874 lp->d_npartitions = MAXPARTITIONS; 875 errors++; 876 } else 877 lp->d_npartitions = v; 878 continue; 879 } 880 if (tp == NULL) 881 tp = blank; 882 if (streq(cp, "disk")) { 883 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 884 continue; 885 } 886 if (streq(cp, "label")) { 887 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 888 continue; 889 } 890 if (streq(cp, "bytes/sector")) { 891 v = strtoul(tp, NULL, 10); 892 if (v == 0 || (v % DEV_BSIZE) != 0) { 893 fprintf(stderr, 894 "line %d: %s: bad sector size\n", 895 lineno, tp); 896 errors++; 897 } else 898 lp->d_secsize = v; 899 continue; 900 } 901 if (streq(cp, "sectors/track")) { 902 v = strtoul(tp, NULL, 10); 903 #if (ULONG_MAX != 0xffffffffUL) 904 if (v == 0 || v > 0xffffffff) { 905 #else 906 if (v == 0) { 907 #endif 908 fprintf(stderr, "line %d: %s: bad %s\n", 909 lineno, tp, cp); 910 errors++; 911 } else 912 lp->d_nsectors = v; 913 continue; 914 } 915 if (streq(cp, "sectors/cylinder")) { 916 v = strtoul(tp, NULL, 10); 917 if (v == 0) { 918 fprintf(stderr, "line %d: %s: bad %s\n", 919 lineno, tp, cp); 920 errors++; 921 } else 922 lp->d_secpercyl = v; 923 continue; 924 } 925 if (streq(cp, "tracks/cylinder")) { 926 v = strtoul(tp, NULL, 10); 927 if (v == 0) { 928 fprintf(stderr, "line %d: %s: bad %s\n", 929 lineno, tp, cp); 930 errors++; 931 } else 932 lp->d_ntracks = v; 933 continue; 934 } 935 if (streq(cp, "cylinders")) { 936 v = strtoul(tp, NULL, 10); 937 if (v == 0) { 938 fprintf(stderr, "line %d: %s: bad %s\n", 939 lineno, tp, cp); 940 errors++; 941 } else 942 lp->d_ncylinders = v; 943 continue; 944 } 945 if (streq(cp, "sectors/unit")) { 946 v = strtoul(tp, NULL, 10); 947 if (v == 0) { 948 fprintf(stderr, "line %d: %s: bad %s\n", 949 lineno, tp, cp); 950 errors++; 951 } else 952 lp->d_secperunit = v; 953 continue; 954 } 955 if (streq(cp, "rpm")) { 956 v = strtoul(tp, NULL, 10); 957 if (v == 0 || v > USHRT_MAX) { 958 fprintf(stderr, "line %d: %s: bad %s\n", 959 lineno, tp, cp); 960 errors++; 961 } else 962 lp->d_rpm = v; 963 continue; 964 } 965 if (streq(cp, "interleave")) { 966 v = strtoul(tp, NULL, 10); 967 if (v == 0 || v > USHRT_MAX) { 968 fprintf(stderr, "line %d: %s: bad %s\n", 969 lineno, tp, cp); 970 errors++; 971 } else 972 lp->d_interleave = v; 973 continue; 974 } 975 if (streq(cp, "trackskew")) { 976 v = strtoul(tp, NULL, 10); 977 if (v > USHRT_MAX) { 978 fprintf(stderr, "line %d: %s: bad %s\n", 979 lineno, tp, cp); 980 errors++; 981 } else 982 lp->d_trackskew = v; 983 continue; 984 } 985 if (streq(cp, "cylinderskew")) { 986 v = strtoul(tp, NULL, 10); 987 if (v > USHRT_MAX) { 988 fprintf(stderr, "line %d: %s: bad %s\n", 989 lineno, tp, cp); 990 errors++; 991 } else 992 lp->d_cylskew = v; 993 continue; 994 } 995 if (streq(cp, "headswitch")) { 996 v = strtoul(tp, NULL, 10); 997 lp->d_headswitch = v; 998 continue; 999 } 1000 if (streq(cp, "track-to-track seek")) { 1001 v = strtoul(tp, NULL, 10); 1002 lp->d_trkseek = v; 1003 continue; 1004 } 1005 /* the ':' was removed above */ 1006 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 1007 fprintf(stderr, 1008 "line %d: %s: Unknown disklabel field\n", lineno, 1009 cp); 1010 errors++; 1011 continue; 1012 } 1013 1014 /* Process a partition specification line. */ 1015 part = *cp - 'a'; 1016 if (part >= lp->d_npartitions) { 1017 fprintf(stderr, 1018 "line %d: partition name out of range a-%c: %s\n", 1019 lineno, 'a' + lp->d_npartitions - 1, cp); 1020 errors++; 1021 continue; 1022 } 1023 part_set[part] = 1; 1024 1025 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1026 errors++; 1027 break; 1028 } 1029 } 1030 errors += checklabel(lp); 1031 return (errors == 0); 1032 } 1033 1034 #define NXTNUM(n) do { \ 1035 if (tp == NULL) { \ 1036 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1037 return (1); \ 1038 } else { \ 1039 cp = tp, tp = word(cp); \ 1040 (n) = strtoul(cp, NULL, 10); \ 1041 } \ 1042 } while (0) 1043 1044 /* retain 1 character following number */ 1045 #define NXTWORD(w,n) do { \ 1046 if (tp == NULL) { \ 1047 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1048 return (1); \ 1049 } else { \ 1050 char *tmp; \ 1051 cp = tp, tp = word(cp); \ 1052 (n) = strtoul(cp, &tmp, 10); \ 1053 if (tmp) (w) = *tmp; \ 1054 } \ 1055 } while (0) 1056 1057 /* 1058 * Read a partition line into partition `part' in the specified disklabel. 1059 * Return 0 on success, 1 on failure. 1060 */ 1061 int 1062 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno) 1063 { 1064 struct partition *pp; 1065 char *cp; 1066 const char **cpp; 1067 u_long v; 1068 1069 pp = &lp->d_partitions[part]; 1070 cp = NULL; 1071 1072 v = 0; 1073 NXTWORD(part_size_type[part],v); 1074 if (v == 0 && part_size_type[part] != '*') { 1075 fprintf(stderr, 1076 "line %d: %s: bad partition size\n", lineno, cp); 1077 return (1); 1078 } 1079 pp->p_size = v; 1080 1081 v = 0; 1082 NXTWORD(part_offset_type[part],v); 1083 if (v == 0 && part_offset_type[part] != '*' && 1084 part_offset_type[part] != '\0') { 1085 fprintf(stderr, 1086 "line %d: %s: bad partition offset\n", lineno, cp); 1087 return (1); 1088 } 1089 pp->p_offset = v; 1090 cp = tp, tp = word(cp); 1091 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) 1092 if (*cpp && streq(*cpp, cp)) 1093 break; 1094 if (*cpp != NULL) { 1095 pp->p_fstype = cpp - fstypenames; 1096 } else { 1097 if (isdigit(*cp)) 1098 v = strtoul(cp, NULL, 10); 1099 else 1100 v = FSMAXTYPES; 1101 if (v >= FSMAXTYPES) { 1102 fprintf(stderr, 1103 "line %d: Warning, unknown file system type %s\n", 1104 lineno, cp); 1105 v = FS_UNUSED; 1106 } 1107 pp->p_fstype = v; 1108 } 1109 1110 switch (pp->p_fstype) { 1111 case FS_UNUSED: 1112 /* 1113 * allow us to accept defaults for 1114 * fsize/frag/cpg 1115 */ 1116 if (tp) { 1117 NXTNUM(pp->p_fsize); 1118 if (pp->p_fsize == 0) 1119 break; 1120 NXTNUM(v); 1121 pp->p_frag = v / pp->p_fsize; 1122 } 1123 /* else default to 0's */ 1124 break; 1125 1126 /* These happen to be the same */ 1127 case FS_BSDFFS: 1128 case FS_BSDLFS: 1129 if (tp) { 1130 NXTNUM(pp->p_fsize); 1131 if (pp->p_fsize == 0) 1132 break; 1133 NXTNUM(v); 1134 pp->p_frag = v / pp->p_fsize; 1135 NXTNUM(pp->p_cpg); 1136 } else { 1137 /* 1138 * FIX! poor attempt at adaptive 1139 */ 1140 /* 1 GB */ 1141 if (pp->p_size < 1024*1024*1024 / lp->d_secsize) { 1142 /* 1143 * FIX! These are too low, but are traditional 1144 */ 1145 pp->p_fsize = DEFAULT_NEWFS_FRAG; 1146 pp->p_frag = DEFAULT_NEWFS_BLOCK / 1147 DEFAULT_NEWFS_FRAG; 1148 pp->p_cpg = DEFAULT_NEWFS_CPG; 1149 } else { 1150 pp->p_fsize = BIG_NEWFS_FRAG; 1151 pp->p_frag = BIG_NEWFS_BLOCK / 1152 BIG_NEWFS_FRAG; 1153 pp->p_cpg = BIG_NEWFS_CPG; 1154 } 1155 } 1156 default: 1157 break; 1158 } 1159 return (0); 1160 } 1161 1162 /* 1163 * Check disklabel for errors and fill in 1164 * derived fields according to supplied values. 1165 */ 1166 int 1167 checklabel(struct disklabel *lp) 1168 { 1169 struct partition *pp; 1170 int i, errors = 0; 1171 char part; 1172 u_long total_size, total_percent, current_offset; 1173 int seen_default_offset; 1174 int hog_part; 1175 int j; 1176 struct partition *pp2; 1177 1178 if (lp->d_secsize == 0) { 1179 fprintf(stderr, "sector size 0\n"); 1180 return (1); 1181 } 1182 if (lp->d_nsectors == 0) { 1183 fprintf(stderr, "sectors/track 0\n"); 1184 return (1); 1185 } 1186 if (lp->d_ntracks == 0) { 1187 fprintf(stderr, "tracks/cylinder 0\n"); 1188 return (1); 1189 } 1190 if (lp->d_ncylinders == 0) { 1191 fprintf(stderr, "cylinders/unit 0\n"); 1192 errors++; 1193 } 1194 if (lp->d_rpm == 0) 1195 Warning("revolutions/minute 0"); 1196 if (lp->d_secpercyl == 0) 1197 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1198 if (lp->d_secperunit == 0) 1199 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1200 if (lp->d_bbsize == 0) { 1201 fprintf(stderr, "boot block size 0\n"); 1202 errors++; 1203 } else if (lp->d_bbsize % lp->d_secsize) 1204 Warning("boot block size %% sector-size != 0"); 1205 if (lp->d_npartitions > MAXPARTITIONS) 1206 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", 1207 (u_long)lp->d_npartitions, MAXPARTITIONS); 1208 1209 /* first allocate space to the partitions, then offsets */ 1210 total_size = 0; /* in sectors */ 1211 total_percent = 0; /* in percent */ 1212 hog_part = -1; 1213 /* find all fixed partitions */ 1214 for (i = 0; i < lp->d_npartitions; i++) { 1215 pp = &lp->d_partitions[i]; 1216 if (part_set[i]) { 1217 if (part_size_type[i] == '*') { 1218 if (i == RAW_PART) { 1219 pp->p_size = lp->d_secperunit; 1220 } else { 1221 if (hog_part != -1) 1222 Warning("Too many '*' partitions (%c and %c)", 1223 hog_part + 'a',i + 'a'); 1224 else 1225 hog_part = i; 1226 } 1227 } else { 1228 off_t size; 1229 1230 size = pp->p_size; 1231 switch (part_size_type[i]) { 1232 case '%': 1233 total_percent += size; 1234 break; 1235 case 'k': 1236 case 'K': 1237 size *= 1024ULL; 1238 break; 1239 case 'm': 1240 case 'M': 1241 size *= 1024ULL * 1024ULL; 1242 break; 1243 case 'g': 1244 case 'G': 1245 size *= 1024ULL * 1024ULL * 1024ULL; 1246 break; 1247 case '\0': 1248 break; 1249 default: 1250 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1251 break; 1252 } 1253 /* don't count %'s yet */ 1254 if (part_size_type[i] != '%') { 1255 /* 1256 * for all not in sectors, convert to 1257 * sectors 1258 */ 1259 if (part_size_type[i] != '\0') { 1260 if (size % lp->d_secsize != 0) 1261 Warning("partition %c not an integer number of sectors", 1262 i + 'a'); 1263 size /= lp->d_secsize; 1264 pp->p_size = size; 1265 } 1266 /* else already in sectors */ 1267 if (i != RAW_PART) 1268 total_size += size; 1269 } 1270 } 1271 } 1272 } 1273 /* handle % partitions - note %'s don't need to add up to 100! */ 1274 if (total_percent != 0) { 1275 long free_space = lp->d_secperunit - total_size; 1276 if (total_percent > 100) { 1277 fprintf(stderr,"total percentage %lu is greater than 100\n", 1278 total_percent); 1279 errors++; 1280 } 1281 1282 if (free_space > 0) { 1283 for (i = 0; i < lp->d_npartitions; i++) { 1284 pp = &lp->d_partitions[i]; 1285 if (part_set[i] && part_size_type[i] == '%') { 1286 /* careful of overflows! and integer roundoff */ 1287 pp->p_size = ((double)pp->p_size/100) * free_space; 1288 total_size += pp->p_size; 1289 1290 /* FIX we can lose a sector or so due to roundoff per 1291 partition. A more complex algorithm could avoid that */ 1292 } 1293 } 1294 } else { 1295 fprintf(stderr, 1296 "%ld sectors available to give to '*' and '%%' partitions\n", 1297 free_space); 1298 errors++; 1299 /* fix? set all % partitions to size 0? */ 1300 } 1301 } 1302 /* give anything remaining to the hog partition */ 1303 if (hog_part != -1) { 1304 lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size; 1305 total_size = lp->d_secperunit; 1306 } 1307 1308 /* Now set the offsets for each partition */ 1309 current_offset = 0; /* in sectors */ 1310 seen_default_offset = 0; 1311 for (i = 0; i < lp->d_npartitions; i++) { 1312 part = 'a' + i; 1313 pp = &lp->d_partitions[i]; 1314 if (part_set[i]) { 1315 if (part_offset_type[i] == '*') { 1316 if (i == RAW_PART) { 1317 pp->p_offset = 0; 1318 } else { 1319 pp->p_offset = current_offset; 1320 seen_default_offset = 1; 1321 } 1322 } else { 1323 /* allow them to be out of order for old-style tables */ 1324 if (pp->p_offset < current_offset && 1325 seen_default_offset && i != RAW_PART && 1326 pp->p_fstype != FS_VINUM) { 1327 fprintf(stderr, 1328 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1329 (long)pp->p_offset,i+'a',current_offset); 1330 fprintf(stderr, 1331 "Labels with any *'s for offset must be in ascending order by sector\n"); 1332 errors++; 1333 } else if (pp->p_offset != current_offset && 1334 i != RAW_PART && seen_default_offset) { 1335 /* 1336 * this may give unneeded warnings if 1337 * partitions are out-of-order 1338 */ 1339 Warning( 1340 "Offset %ld for partition %c doesn't match expected value %ld", 1341 (long)pp->p_offset, i + 'a', current_offset); 1342 } 1343 } 1344 if (i != RAW_PART) 1345 current_offset = pp->p_offset + pp->p_size; 1346 } 1347 } 1348 1349 for (i = 0; i < lp->d_npartitions; i++) { 1350 part = 'a' + i; 1351 pp = &lp->d_partitions[i]; 1352 if (pp->p_size == 0 && pp->p_offset != 0) 1353 Warning("partition %c: size 0, but offset %lu", 1354 part, (u_long)pp->p_offset); 1355 #ifdef notdef 1356 if (pp->p_size % lp->d_secpercyl) 1357 Warning("partition %c: size %% cylinder-size != 0", 1358 part); 1359 if (pp->p_offset % lp->d_secpercyl) 1360 Warning("partition %c: offset %% cylinder-size != 0", 1361 part); 1362 #endif 1363 if (pp->p_offset > lp->d_secperunit) { 1364 fprintf(stderr, 1365 "partition %c: offset past end of unit\n", part); 1366 errors++; 1367 } 1368 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1369 fprintf(stderr, 1370 "partition %c: partition extends past end of unit\n", 1371 part); 1372 errors++; 1373 } 1374 if (i == RAW_PART) 1375 { 1376 if (pp->p_fstype != FS_UNUSED) 1377 Warning("partition %c is not marked as unused!",part); 1378 if (pp->p_offset != 0) 1379 Warning("partition %c doesn't start at 0!",part); 1380 if (pp->p_size != lp->d_secperunit) 1381 Warning("partition %c doesn't cover the whole unit!",part); 1382 1383 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1384 (pp->p_size != lp->d_secperunit)) { 1385 Warning("An incorrect partition %c may cause problems for " 1386 "standard system utilities",part); 1387 } 1388 } 1389 1390 /* check for overlaps */ 1391 /* this will check for all possible overlaps once and only once */ 1392 for (j = 0; j < i; j++) { 1393 pp2 = &lp->d_partitions[j]; 1394 if (j != RAW_PART && i != RAW_PART && 1395 pp->p_fstype != FS_VINUM && 1396 pp2->p_fstype != FS_VINUM && 1397 part_set[i] && part_set[j]) { 1398 if (pp2->p_offset < pp->p_offset + pp->p_size && 1399 (pp2->p_offset + pp2->p_size > pp->p_offset || 1400 pp2->p_offset >= pp->p_offset)) { 1401 fprintf(stderr,"partitions %c and %c overlap!\n", 1402 j + 'a', i + 'a'); 1403 errors++; 1404 } 1405 } 1406 } 1407 } 1408 for (; i < MAXPARTITIONS; i++) { 1409 part = 'a' + i; 1410 pp = &lp->d_partitions[i]; 1411 if (pp->p_size || pp->p_offset) 1412 Warning("unused partition %c: size %d offset %lu", 1413 'a' + i, pp->p_size, (u_long)pp->p_offset); 1414 } 1415 return (errors); 1416 } 1417 1418 /* 1419 * When operating on a "virgin" disk, try getting an initial label 1420 * from the associated device driver. This might work for all device 1421 * drivers that are able to fetch some initial device parameters 1422 * without even having access to a (BSD) disklabel, like SCSI disks, 1423 * most IDE drives, or vn devices. 1424 * 1425 * The device name must be given in its "canonical" form. 1426 */ 1427 struct disklabel * 1428 getvirginlabel(void) 1429 { 1430 static struct disklabel loclab; 1431 struct partition *dp; 1432 char lnamebuf[BBSIZE]; 1433 int f; 1434 u_int secsize, u; 1435 off_t mediasize; 1436 1437 if (dkname[0] == '/') { 1438 warnx("\"auto\" requires the usage of a canonical disk name"); 1439 return (NULL); 1440 } 1441 (void)snprintf(lnamebuf, BBSIZE, "%s%s", _PATH_DEV, dkname); 1442 if ((f = open(lnamebuf, O_RDONLY)) == -1) { 1443 warn("cannot open %s", lnamebuf); 1444 return (NULL); 1445 } 1446 1447 /* New world order */ 1448 if ((ioctl(f, DIOCGMEDIASIZE, &mediasize) != 0) || 1449 (ioctl(f, DIOCGSECTORSIZE, &secsize) != 0)) { 1450 close (f); 1451 return (NULL); 1452 } 1453 memset(&loclab, 0, sizeof loclab); 1454 loclab.d_magic = DISKMAGIC; 1455 loclab.d_magic2 = DISKMAGIC; 1456 loclab.d_secsize = secsize; 1457 loclab.d_secperunit = mediasize / secsize; 1458 1459 /* 1460 * Nobody in these enligthened days uses the CHS geometry for 1461 * anything, but nontheless try to get it right. If we fail 1462 * to get any good ideas from the device, construct something 1463 * which is IBM-PC friendly. 1464 */ 1465 if (ioctl(f, DIOCGFWSECTORS, &u) == 0) 1466 loclab.d_nsectors = u; 1467 else 1468 loclab.d_nsectors = 63; 1469 if (ioctl(f, DIOCGFWHEADS, &u) == 0) 1470 loclab.d_ntracks = u; 1471 else if (loclab.d_secperunit <= 63*1*1024) 1472 loclab.d_ntracks = 1; 1473 else if (loclab.d_secperunit <= 63*16*1024) 1474 loclab.d_ntracks = 16; 1475 else 1476 loclab.d_ntracks = 255; 1477 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors; 1478 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl; 1479 loclab.d_npartitions = MAXPARTITIONS; 1480 1481 /* Various (unneeded) compat stuff */ 1482 loclab.d_rpm = 3600; 1483 loclab.d_bbsize = BBSIZE; 1484 loclab.d_interleave = 1;; 1485 strncpy(loclab.d_typename, "amnesiac", 1486 sizeof(loclab.d_typename)); 1487 1488 dp = &loclab.d_partitions[RAW_PART]; 1489 dp->p_size = loclab.d_secperunit; 1490 loclab.d_checksum = dkcksum(&loclab); 1491 close (f); 1492 return (&loclab); 1493 } 1494 1495 1496 /*VARARGS1*/ 1497 void 1498 Warning(const char *fmt, ...) 1499 { 1500 va_list ap; 1501 1502 fprintf(stderr, "Warning, "); 1503 va_start(ap, fmt); 1504 vfprintf(stderr, fmt, ap); 1505 fprintf(stderr, "\n"); 1506 va_end(ap); 1507 } 1508 1509 void 1510 usage(void) 1511 { 1512 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", 1513 "usage: disklabel [-r] disk", 1514 "\t\t(to read label)", 1515 " disklabel -w [-r] [-n] disk type [ packid ]", 1516 "\t\t(to write label with existing boot program)", 1517 " disklabel -e [-r] [-n] disk", 1518 "\t\t(to edit label)", 1519 " disklabel -R [-r] [-n] disk protofile", 1520 "\t\t(to restore label with existing boot program)", 1521 " disklabel -B [-n] [ -b bootprog ] disk [ type ]", 1522 "\t\t(to install boot program with existing on-disk label)", 1523 " disklabel -w -B [-n] [ -b bootprog ] disk type [ packid ]", 1524 "\t\t(to write label and install boot program)", 1525 " disklabel -R -B [-n] [ -b bootprog ] disk protofile [ type ]", 1526 "\t\t(to restore label and install boot program)" 1527 ); 1528 exit(1); 1529 } 1530