main.c revision 1.25
1 /* $NetBSD: main.c,v 1.25 2011/08/29 14:34:59 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Julio M. Merino Vidal. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1987, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Symmetric Computer Systems. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64 #if HAVE_NBTOOL_CONFIG_H 65 #include "nbtool_config.h" 66 #endif 67 68 #include <sys/cdefs.h> 69 #ifndef lint 70 __COPYRIGHT("@(#) Copyright (c) 1987, 1993\ 71 The Regents of the University of California. All rights reserved."); 72 #endif /* not lint */ 73 74 #ifndef lint 75 #if 0 76 static char sccsid[] = "@(#)disklabel.c 8.4 (Berkeley) 5/4/95"; 77 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */ 78 #else 79 __RCSID("$NetBSD: main.c,v 1.25 2011/08/29 14:34:59 joerg Exp $"); 80 #endif 81 #endif /* not lint */ 82 83 #include <sys/param.h> 84 #include <sys/file.h> 85 #include <sys/stat.h> 86 #include <sys/wait.h> 87 #define DKTYPENAMES 88 #define FSTYPENAMES 89 90 #include <ctype.h> 91 #include <err.h> 92 #include <errno.h> 93 #include <signal.h> 94 #include <string.h> 95 #include <stdio.h> 96 #include <stdlib.h> 97 #include <limits.h> 98 #include <unistd.h> 99 100 #include <ufs/ufs/dinode.h> 101 #include <ufs/ffs/fs.h> 102 103 #if HAVE_NBTOOL_CONFIG_H 104 #include <nbinclude/sys/disklabel.h> 105 #include <nbinclude/sys/disklabel_acorn.h> 106 #include <nbinclude/sys/bootblock.h> 107 #include "../../include/disktab.h" 108 #else 109 #include <sys/ioctl.h> 110 #include <sys/disklabel.h> 111 #include <sys/disklabel_acorn.h> 112 #include <sys/bootblock.h> 113 #include <util.h> 114 #include <disktab.h> 115 #endif /* HAVE_NBTOOL_CONFIG_H */ 116 117 #include "pathnames.h" 118 #include "extern.h" 119 #include "dkcksum.h" 120 #include "bswap.h" 121 122 /* 123 * Disklabel: read and write disklabels. 124 * The label is usually placed on one of the first sectors of the disk. 125 * Many machines also place a bootstrap in the same area, 126 * in which case the label is embedded in the bootstrap. 127 * The bootstrap source must leave space at the proper offset 128 * for the label on such machines. 129 */ 130 131 #ifndef BBSIZE 132 #define BBSIZE 8192 /* size of boot area, with label */ 133 #endif 134 135 #define DISKMAGIC_REV bswap32(DISKMAGIC) 136 /* To delete a label, we just invert the magic numbers */ 137 #define DISKMAGIC_DELETED (~DISKMAGIC) 138 #define DISKMAGIC_DELETED_REV bswap32(~DISKMAGIC) 139 140 #define DEFEDITOR _PATH_VI 141 142 char specname[MAXPATHLEN]; 143 144 /* Some global data, all too hard to pass about */ 145 char bootarea[BBSIZE]; /* Buffer matching part of disk */ 146 int bootarea_len; /* Number of bytes we actually read */ 147 static struct disklabel lab; /* The label we have updated */ 148 149 static int Aflag; /* Action all labels */ 150 static int Fflag; /* Read/write from file */ 151 static int rflag; /* Read/write direct from disk */ 152 static int tflag; /* Format output as disktab */ 153 int Cflag; /* CHS format output */ 154 static int Dflag; /* Delete old labels (use with write) */ 155 static int Iflag; /* Read/write direct, but default if absent */ 156 static int lflag; /* List all known file system types and exit */ 157 static int mflag; /* Expect disk to contain an MBR */ 158 static int verbose; 159 static int read_all; /* set if op = READ && Aflag */ 160 161 static int write_label(int); 162 static int readlabel_direct(int); 163 static void writelabel_direct(int); 164 static int update_label(int, u_int, u_int); 165 static struct disklabel *find_label(int, u_int); 166 167 static void makedisktab(FILE *, struct disklabel *); 168 static void makelabel(const char *, const char *); 169 static void l_perror(const char *); 170 static void readlabel(int); 171 static int edit(int); 172 static int editit(const char *); 173 static char *skip(char *); 174 static char *word(char *); 175 static int getasciilabel(FILE *, struct disklabel *); 176 __dead static void usage(void); 177 static int qsort_strcmp(const void *, const void *); 178 static int getulong(const char *, char, char **, 179 unsigned long *, unsigned long); 180 #define GETNUM32(a, v) getulong(a, '\0', NULL, v, UINT32_MAX) 181 #define GETNUM16(a, v) getulong(a, '\0', NULL, v, UINT16_MAX) 182 #define GETNUM8(a, v) getulong(a, '\0', NULL, v, UINT8_MAX) 183 184 static int set_writable_fd = -1; 185 186 #if HAVE_NBTOOL_CONFIG_H 187 #define GETLABELOFFSET() LABELOFFSET 188 #define GETLABELSECTOR() LABELSECTOR 189 #else /* HAVE_NBTOOL_CONFIG_H */ 190 #define GETLABELOFFSET() getlabeloffset() 191 #define GETLABELSECTOR() getlabelsector() 192 #endif 193 194 /* Default location for label - only used if we don't find one to update */ 195 #define LABEL_OFFSET (dklabel_getlabelsector() * DEV_BSIZE + dklabel_getlabeloffset()) 196 197 /* 198 * For portability it doesn't make sense to use any other value.... 199 * Except, maybe, the size of a physical sector. 200 * This value is used if we have to write a label to the start of an mbr ptn. 201 */ 202 #ifndef LABELOFFSET_MBR 203 #define LABELOFFSET_MBR 512 204 #endif 205 206 #if HAVE_NBTOOL_CONFIG_H 207 static int 208 opendisk(const char *path, int flags, char *buf, int buflen, int cooked) 209 { 210 int f; 211 f = open(path, flags, 0); 212 strlcpy(buf, path, buflen); 213 return f; 214 } 215 216 static int 217 dk_ioctl(int f, void *arg) 218 { 219 errno = ENOTTY; 220 return -1; 221 } 222 #define dk_ioctl(f, cmd, arg) dk_ioctl(f, arg) 223 #else 224 #define dk_ioctl(f, cmd, arg) ioctl(f, cmd, arg) 225 #endif /* HAVE_NBTOOL_CONFIG_H */ 226 227 static daddr_t 228 dklabel_getlabelsector(void) 229 { 230 unsigned long int nval; 231 char *end; 232 const char *val; 233 234 if ((val = getenv("DISKLABELSECTOR")) == NULL) 235 return GETLABELSECTOR(); 236 if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE) 237 err(EXIT_FAILURE, "DISKLABELSECTOR in environment"); 238 return nval; 239 } 240 241 static off_t 242 dklabel_getlabeloffset(void) 243 { 244 unsigned long int nval; 245 char *end; 246 const char *val; 247 248 if ((val = getenv("DISKLABELOFFSET")) == NULL) 249 return GETLABELOFFSET(); 250 if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE) 251 err(EXIT_FAILURE, "DISKLABELOFFSET in environment"); 252 return nval; 253 } 254 255 static void 256 clear_writable(void) 257 { 258 static int zero = 0; 259 dk_ioctl(set_writable_fd, DIOCWLABEL, &zero); 260 } 261 262 int 263 main(int argc, char *argv[]) 264 { 265 FILE *t; 266 int ch, f, error; 267 char *dkname; 268 struct stat sb; 269 int writable; 270 enum { 271 UNSPEC, EDIT, READ, RESTORE, SETWRITABLE, SETREADONLY, 272 WRITE, INTERACT, DELETE 273 } op = UNSPEC, old_op; 274 275 #ifdef USE_MBR 276 mflag = 1; 277 #endif 278 #if HAVE_NBTOOL_CONFIG_H 279 /* We must avoid doing any ioctl requests */ 280 Fflag = rflag = 1; 281 #endif 282 283 error = 0; 284 while ((ch = getopt(argc, argv, "ACDFINRWb:ef:ilmrs:tvw")) != -1) { 285 old_op = op; 286 switch (ch) { 287 case 'A': /* Action all labels */ 288 Aflag = 1; 289 rflag = 1; 290 break; 291 case 'C': /* Display in CHS format */ 292 Cflag = 1; 293 break; 294 case 'D': /* Delete all existing labels */ 295 Dflag = 1; 296 rflag = 1; 297 break; 298 case 'F': /* Treat 'disk' as a regular file */ 299 Fflag = 1; 300 rflag = 1; /* Force direct access */ 301 break; 302 case 'I': /* Use default label if none found */ 303 Iflag = 1; 304 rflag = 1; /* Implies direct access */ 305 break; 306 case 'R': /* Restore label from text file */ 307 op = RESTORE; 308 break; 309 case 'N': /* Disallow writes to label sector */ 310 op = SETREADONLY; 311 break; 312 case 'W': /* Allow writes to label sector */ 313 op = SETWRITABLE; 314 break; 315 case 'e': /* Edit label with $EDITOR */ 316 op = EDIT; 317 break; 318 case 'f': /* Name of disktab file */ 319 if (setdisktab(optarg) == -1) 320 usage(); 321 break; 322 case 'i': /* Edit using built-in editor */ 323 op = INTERACT; 324 break; 325 case 'l': /* List all known file system types and exit */ 326 lflag = 1; 327 break; 328 case 'm': /* Expect disk to have an MBR */ 329 mflag ^= 1; 330 break; 331 case 'r': /* Read/write label directly from disk */ 332 rflag = 1; 333 break; 334 case 't': /* Format output as a disktab entry */ 335 tflag = 1; 336 break; 337 case 'v': /* verbose/diag output */ 338 verbose++; 339 break; 340 case 'w': /* Write label based on disktab entry */ 341 op = WRITE; 342 break; 343 case '?': 344 default: 345 usage(); 346 } 347 if (old_op != UNSPEC && old_op != op) 348 usage(); 349 } 350 argc -= optind; 351 argv += optind; 352 353 if (lflag) 354 exit(list_fs_types() ? EXIT_SUCCESS : EXIT_FAILURE); 355 356 if (op == UNSPEC) 357 op = Dflag ? DELETE : READ; 358 359 if (argc < 1) 360 usage(); 361 362 if (Iflag && op != EDIT && op != INTERACT) 363 usage(); 364 365 dkname = argv[0]; 366 f = opendisk(dkname, op == READ ? O_RDONLY : O_RDWR, 367 specname, sizeof specname, 0); 368 if (f < 0) 369 err(4, "%s", specname); 370 371 if (!Fflag && fstat(f, &sb) == 0 && S_ISREG(sb.st_mode)) 372 Fflag = rflag = 1; 373 374 switch (op) { 375 376 case DELETE: /* Remove all existing labels */ 377 if (argc != 1) 378 usage(); 379 Dflag = 2; 380 writelabel_direct(f); 381 break; 382 383 case EDIT: 384 if (argc != 1) 385 usage(); 386 readlabel(f); 387 error = edit(f); 388 break; 389 390 case INTERACT: 391 if (argc != 1) 392 usage(); 393 readlabel(f); 394 /* 395 * XXX: Fill some default values so checklabel does not fail 396 */ 397 if (lab.d_bbsize == 0) 398 lab.d_bbsize = BBSIZE; 399 if (lab.d_sbsize == 0) 400 lab.d_sbsize = SBLOCKSIZE; 401 interact(&lab, f); 402 break; 403 404 case READ: 405 if (argc != 1) 406 usage(); 407 read_all = Aflag; 408 readlabel(f); 409 if (read_all) 410 /* Label got printed in the bowels of readlabel */ 411 break; 412 if (tflag) 413 makedisktab(stdout, &lab); 414 else { 415 showinfo(stdout, &lab, specname); 416 showpartitions(stdout, &lab, Cflag); 417 } 418 error = checklabel(&lab); 419 if (error) 420 error += 100; 421 break; 422 423 case RESTORE: 424 if (argc != 2) 425 usage(); 426 if (!(t = fopen(argv[1], "r"))) 427 err(4, "%s", argv[1]); 428 if (getasciilabel(t, &lab)) 429 error = write_label(f); 430 else 431 error = 1; 432 break; 433 434 case SETREADONLY: 435 writable = 0; 436 goto do_diocwlabel; 437 case SETWRITABLE: 438 writable = 1; 439 do_diocwlabel: 440 if (argc != 1) 441 usage(); 442 if (dk_ioctl(f, DIOCWLABEL, &writable) < 0) 443 err(4, "ioctl DIOCWLABEL"); 444 break; 445 446 case WRITE: /* Create label from /etc/disktab entry & write */ 447 if (argc < 2 || argc > 3) 448 usage(); 449 makelabel(argv[1], argv[2]); 450 if (checklabel(&lab) == 0) 451 error = write_label(f); 452 else 453 error = 1; 454 break; 455 456 case UNSPEC: 457 usage(); 458 459 } 460 exit(error); 461 } 462 463 /* 464 * Construct a prototype disklabel from /etc/disktab. 465 */ 466 static void 467 makelabel(const char *type, const char *name) 468 { 469 struct disklabel *dp; 470 471 dp = getdiskbyname(type); 472 if (dp == NULL) 473 errx(1, "unknown disk type: %s", type); 474 lab = *dp; 475 476 /* d_packname is union d_boot[01], so zero */ 477 (void)memset(lab.d_packname, 0, sizeof(lab.d_packname)); 478 if (name) 479 (void)strncpy(lab.d_packname, name, sizeof(lab.d_packname)); 480 } 481 482 static int 483 write_label(int f) 484 { 485 int writable; 486 487 lab.d_magic = DISKMAGIC; 488 lab.d_magic2 = DISKMAGIC; 489 lab.d_checksum = 0; 490 lab.d_checksum = dkcksum(&lab); 491 492 if (rflag) { 493 /* Write the label directly to the disk */ 494 495 /* 496 * First set the kernel disk label, 497 * then write a label to the raw disk. 498 * If the SDINFO ioctl fails because it is unimplemented, 499 * keep going; otherwise, the kernel consistency checks 500 * may prevent us from changing the current (in-core) 501 * label. 502 */ 503 if (!Fflag && dk_ioctl(f, DIOCSDINFO, &lab) < 0 && 504 errno != ENODEV && errno != ENOTTY) { 505 l_perror("ioctl DIOCSDINFO"); 506 return (1); 507 } 508 /* 509 * write enable label sector before write (if necessary), 510 * disable after writing. 511 */ 512 writable = 1; 513 if (!Fflag) { 514 if (dk_ioctl(f, DIOCWLABEL, &writable) < 0) 515 perror("ioctl DIOCWLABEL"); 516 set_writable_fd = f; 517 atexit(clear_writable); 518 } 519 520 writelabel_direct(f); 521 522 /* 523 * Now issue a DIOCWDINFO. This will let the kernel convert the 524 * disklabel to some machdep format if needed. 525 */ 526 /* XXX: This is stupid! */ 527 if (!Fflag && dk_ioctl(f, DIOCWDINFO, &lab) < 0) { 528 l_perror("ioctl DIOCWDINFO"); 529 return (1); 530 } 531 } else { 532 /* Get the kernel to write the label */ 533 if (dk_ioctl(f, DIOCWDINFO, &lab) < 0) { 534 l_perror("ioctl DIOCWDINFO"); 535 return (1); 536 } 537 } 538 539 #ifdef VAX_ALTLABELS 540 if (lab.d_type == DTYPE_SMD && lab.d_flags & D_BADSECT && 541 lab.d_secsize == 512) { 542 /* Write the label to the odd sectors of the last track! */ 543 daddr_t alt; 544 int i; 545 uint8_t sec0[512]; 546 547 if (pread(f, sec0, 512, 0) < 512) { 548 warn("read master label to write alternates"); 549 return 0; 550 } 551 552 alt = lab.d_ncylinders * lab.d_secpercyl - lab.d_nsectors; 553 for (i = 1; i < 11 && (uint32_t)i < lab.d_nsectors; i += 2) { 554 if (pwrite(f, sec0, 512, (off_t)(alt + i) * 512) < 512) 555 warn("alternate label %d write", i/2); 556 } 557 } 558 #endif /* VAX_ALTLABELS */ 559 560 return 0; 561 } 562 563 int 564 writelabel(int f, struct disklabel *lp) 565 { 566 if (lp != &lab) 567 lab = *lp; 568 return write_label(f); 569 } 570 571 static void 572 l_perror(const char *s) 573 { 574 575 switch (errno) { 576 577 case ESRCH: 578 warnx("%s: No disk label on disk;\n" 579 "use \"disklabel -I\" to install initial label", s); 580 break; 581 582 case EINVAL: 583 warnx("%s: Label magic number or checksum is wrong!\n" 584 "(disklabel or kernel is out of date?)", s); 585 break; 586 587 case EBUSY: 588 warnx("%s: Open partition would move or shrink", s); 589 break; 590 591 case EXDEV: 592 warnx("%s: Labeled partition or 'a' partition must start" 593 " at beginning of disk", s); 594 break; 595 596 default: 597 warn("%s", s); 598 break; 599 } 600 } 601 602 #ifdef NO_MBR_SUPPORT 603 #define process_mbr(f, action) 1 604 #else 605 /* 606 * Scan DOS/MBR partition table and extended partition list for NetBSD ptns. 607 */ 608 static int 609 process_mbr(int f, int (*action)(int, u_int)) 610 { 611 struct mbr_partition *dp; 612 struct mbr_sector mbr; 613 int rval = 1, res; 614 int part; 615 u_int ext_base, next_ext, this_ext, start; 616 617 ext_base = 0; 618 next_ext = 0; 619 for (;;) { 620 this_ext = next_ext; 621 next_ext = 0; 622 if (verbose > 1) 623 warnx("reading mbr sector %u", this_ext); 624 if (pread(f, &mbr, sizeof mbr, this_ext * (off_t)DEV_BSIZE) 625 != sizeof(mbr)) { 626 if (verbose) 627 warn("Can't read master boot record %u", 628 this_ext); 629 break; 630 } 631 632 /* Check if table is valid. */ 633 if (mbr.mbr_magic != htole16(MBR_MAGIC)) { 634 if (verbose) 635 warnx("Invalid signature in mbr record %u", 636 this_ext); 637 break; 638 } 639 640 dp = &mbr.mbr_parts[0]; 641 642 /* Find NetBSD partition(s). */ 643 for (part = 0; part < MBR_PART_COUNT; dp++, part++) { 644 start = le32toh(dp->mbrp_start); 645 switch (dp->mbrp_type) { 646 #ifdef COMPAT_386BSD_MBRPART 647 case MBR_PTYPE_386BSD: 648 if (ext_base != 0) 649 break; 650 /* FALLTHROUGH */ 651 #endif 652 case MBR_PTYPE_NETBSD: 653 res = action(f, this_ext + start); 654 if (res <= 0) 655 /* Found or failure */ 656 return res; 657 if (res > rval) 658 /* Keep largest value */ 659 rval = res; 660 break; 661 case MBR_PTYPE_EXT: 662 case MBR_PTYPE_EXT_LBA: 663 case MBR_PTYPE_EXT_LNX: 664 next_ext = start; 665 break; 666 default: 667 break; 668 } 669 } 670 if (next_ext == 0) 671 /* No more extended partitions */ 672 break; 673 next_ext += ext_base; 674 if (ext_base == 0) 675 ext_base = next_ext; 676 677 if (next_ext <= this_ext) { 678 if (verbose) 679 warnx("Invalid extended chain %x <= %x", 680 next_ext, this_ext); 681 break; 682 } 683 /* Maybe we should check against the disk size... */ 684 } 685 686 return rval; 687 } 688 689 static int 690 readlabel_mbr(int f, u_int sector) 691 { 692 struct disklabel *disk_lp; 693 694 disk_lp = find_label(f, sector); 695 if (disk_lp == NULL) 696 return 1; 697 targettohlabel(&lab, disk_lp); 698 return 0; 699 } 700 701 static int 702 writelabel_mbr(int f, u_int sector) 703 { 704 return update_label(f, sector, mflag ? LABELOFFSET_MBR : ~0U) ? 2 : 0; 705 } 706 707 #endif /* !NO_MBR_SUPPORT */ 708 709 #ifndef USE_ACORN 710 #define get_filecore_partition(f) 0 711 #else 712 /* 713 * static int filecore_checksum(u_char *bootblock) 714 * 715 * Calculates the filecore boot block checksum. This is used to validate 716 * a filecore boot block on the disk. If a boot block is validated then 717 * it is used to locate the partition table. If the boot block is not 718 * validated, it is assumed that the whole disk is NetBSD. 719 * 720 * The basic algorithm is: 721 * 722 * for (each byte in block, excluding checksum) { 723 * sum += byte; 724 * if (sum > 255) 725 * sum -= 255; 726 * } 727 * 728 * That's equivalent to summing all of the bytes in the block 729 * (excluding the checksum byte, of course), then calculating the 730 * checksum as "cksum = sum - ((sum - 1) / 255) * 255)". That 731 * expression may or may not yield a faster checksum function, 732 * but it's easier to reason about. 733 * 734 * Note that if you have a block filled with bytes of a single 735 * value "X" (regardless of that value!) and calculate the cksum 736 * of the block (excluding the checksum byte), you will _always_ 737 * end up with a checksum of X. (Do the math; that can be derived 738 * from the checksum calculation function!) That means that 739 * blocks which contain bytes which all have the same value will 740 * always checksum properly. That's a _very_ unlikely occurence 741 * (probably impossible, actually) for a valid filecore boot block, 742 * so we treat such blocks as invalid. 743 */ 744 static int 745 filecore_checksum(u_char *bootblock) 746 { 747 u_char byte0, accum_diff; 748 u_int sum; 749 int i; 750 751 sum = 0; 752 accum_diff = 0; 753 byte0 = bootblock[0]; 754 755 /* 756 * Sum the contents of the block, keeping track of whether 757 * or not all bytes are the same. If 'accum_diff' ends up 758 * being zero, all of the bytes are, in fact, the same. 759 */ 760 for (i = 0; i < 511; ++i) { 761 sum += bootblock[i]; 762 accum_diff |= bootblock[i] ^ byte0; 763 } 764 765 /* 766 * Check to see if the checksum byte is the same as the 767 * rest of the bytes, too. (Note that if all of the bytes 768 * are the same except the checksum, a checksum compare 769 * won't succeed, but that's not our problem.) 770 */ 771 accum_diff |= bootblock[i] ^ byte0; 772 773 /* All bytes in block are the same; call it invalid. */ 774 if (accum_diff == 0) 775 return (-1); 776 777 return (sum - ((sum - 1) / 255) * 255); 778 } 779 780 /* 781 * Check for the presence of a RiscOS filecore boot block 782 * indicating an ADFS file system on the disc. 783 * Return the offset to the NetBSD part of the disc if 784 * this can be determined. 785 * This routine will terminate disklabel if the disc 786 * is found to be ADFS only. 787 */ 788 static u_int 789 get_filecore_partition(int f) 790 { 791 struct filecore_bootblock *fcbb; 792 static u_char bb[DEV_BSIZE]; 793 u_int offset; 794 struct riscix_partition_table *riscix_part; 795 int loop; 796 797 if (pread(f, bb, sizeof(bb), (off_t)FILECORE_BOOT_SECTOR * DEV_BSIZE) != sizeof(bb)) 798 err(4, "can't read filecore boot block"); 799 fcbb = (struct filecore_bootblock *)bb; 800 801 /* Check if table is valid. */ 802 if (filecore_checksum(bb) != fcbb->checksum) 803 return (0); 804 805 /* 806 * Check for NetBSD/arm32 (RiscBSD) partition marker. 807 * If found the NetBSD disklabel location is easy. 808 */ 809 offset = (fcbb->partition_cyl_low + (fcbb->partition_cyl_high << 8)) 810 * fcbb->heads * fcbb->secspertrack; 811 812 switch (fcbb->partition_type) { 813 814 case PARTITION_FORMAT_RISCBSD: 815 return (offset); 816 817 case PARTITION_FORMAT_RISCIX: 818 /* 819 * Read the RISCiX partition table and search for the 820 * first partition named "RiscBSD", "NetBSD", or "Empty:" 821 * 822 * XXX is use of 'Empty:' really desirable?! -- cgd 823 */ 824 825 if (pread(f, bb, sizeof(bb), (off_t)offset * DEV_BSIZE) != sizeof(bb)) 826 err(4, "can't read riscix partition table"); 827 riscix_part = (struct riscix_partition_table *)bb; 828 829 for (loop = 0; loop < NRISCIX_PARTITIONS; ++loop) { 830 if (strcmp((char *)riscix_part->partitions[loop].rp_name, 831 "RiscBSD") == 0 || 832 strcmp((char *)riscix_part->partitions[loop].rp_name, 833 "NetBSD") == 0 || 834 strcmp((char *)riscix_part->partitions[loop].rp_name, 835 "Empty:") == 0) { 836 return riscix_part->partitions[loop].rp_start; 837 break; 838 } 839 } 840 /* 841 * Valid filecore boot block, RISCiX partition table 842 * but no NetBSD partition. We should leave this 843 * disc alone. 844 */ 845 errx(4, "cannot label: no NetBSD partition found" 846 " in RISCiX partition table"); 847 848 default: 849 /* 850 * Valid filecore boot block and no non-ADFS partition. 851 * This means that the whole disc is allocated for ADFS 852 * so do not trash ! If the user really wants to put a 853 * NetBSD disklabel on the disc then they should remove 854 * the filecore boot block first with dd. 855 */ 856 errx(4, "cannot label: filecore-only disk" 857 " (no non-ADFS partition)"); 858 } 859 return (0); 860 } 861 #endif /* USE_ACORN */ 862 863 /* 864 * Fetch disklabel for disk to 'lab'. 865 * Use ioctl to get label unless -r flag is given. 866 */ 867 static void 868 readlabel(int f) 869 { 870 if (rflag) { 871 /* Get label directly from disk */ 872 if (readlabel_direct(f) == 0) 873 return; 874 /* 875 * There was no label on the disk. Get the fictious one 876 * as a basis for initialisation. 877 */ 878 if (!Fflag && Iflag && (dk_ioctl(f, DIOCGDINFO, &lab) == 0 || 879 dk_ioctl(f, DIOCGDEFLABEL, &lab) == 0)) 880 return; 881 } else { 882 /* Get label from kernel. */ 883 if (dk_ioctl(f, DIOCGDINFO, &lab) < 0) 884 err(4, "ioctl DIOCGDINFO"); 885 return; 886 } 887 888 if (read_all == 2) 889 /* We actually found one, and printed it... */ 890 exit(0); 891 errx(1, "could not read existing label"); 892 } 893 894 /* 895 * Reading the label from the disk is largely a case of 'hunt the label'. 896 * and since different architectures default to different places there 897 * could even be more than one label that contradict each other! 898 * For now we look in the expected place, then search through likely 899 * other locations. 900 */ 901 static struct disklabel * 902 find_label(int f, u_int sector) 903 { 904 struct disklabel *disk_lp, hlp; 905 int i; 906 u_int offset; 907 const char *is_deleted; 908 909 bootarea_len = pread(f, bootarea, sizeof bootarea, 910 sector * (off_t)DEV_BSIZE); 911 if (bootarea_len <= 0) { 912 if (verbose) 913 warn("failed to read bootarea from sector %u", sector); 914 return NULL; 915 } 916 917 if (verbose > 2) 918 warnx("read sector %u len %d looking for label", 919 sector, bootarea_len); 920 921 /* Check expected offset first */ 922 for (offset = LABEL_OFFSET, i = -4;; offset = i += 4) { 923 is_deleted = ""; 924 disk_lp = (void *)(bootarea + offset); 925 if (i == LABEL_OFFSET) 926 continue; 927 if ((char *)(disk_lp + 1) > bootarea + bootarea_len) 928 break; 929 if (disk_lp->d_magic2 != disk_lp->d_magic) 930 continue; 931 if (read_all && (disk_lp->d_magic == DISKMAGIC_DELETED || 932 disk_lp->d_magic == DISKMAGIC_DELETED_REV)) { 933 disk_lp->d_magic ^= ~0u; 934 disk_lp->d_magic2 ^= ~0u; 935 is_deleted = "deleted "; 936 } 937 if (target32toh(disk_lp->d_magic) != DISKMAGIC) { 938 /* XXX: Do something about byte-swapped labels ? */ 939 if (target32toh(disk_lp->d_magic) == DISKMAGIC_REV && 940 target32toh(disk_lp->d_magic2) == DISKMAGIC_REV) 941 warnx("ignoring %sbyteswapped label" 942 " at offset %u from sector %u", 943 is_deleted, offset, sector); 944 continue; 945 } 946 if (target16toh(disk_lp->d_npartitions) > MAXPARTITIONS || 947 dkcksum_target(disk_lp) != 0) { 948 if (verbose > 0) 949 warnx("corrupt label found at offset %u in " 950 "sector %u", offset, sector); 951 continue; 952 } 953 if (verbose > 1) 954 warnx("%slabel found at offset %u from sector %u", 955 is_deleted, offset, sector); 956 if (!read_all) 957 return disk_lp; 958 959 /* To print all the labels we have to do it here */ 960 /* XXX: maybe we should compare them? */ 961 targettohlabel(&hlp, disk_lp); 962 printf("# %ssector %u offset %u bytes\n", 963 is_deleted, sector, offset); 964 if (tflag) 965 makedisktab(stdout, &hlp); 966 else { 967 showinfo(stdout, &hlp, specname); 968 showpartitions(stdout, &hlp, Cflag); 969 } 970 checklabel(&hlp); 971 htotargetlabel(disk_lp, &hlp); 972 /* Remember we've found a label */ 973 read_all = 2; 974 } 975 return NULL; 976 } 977 978 static void 979 write_bootarea(int f, u_int sector) 980 { 981 int wlen; 982 983 if (bootarea_len <= 0) 984 errx(1, "attempting to write after failed read"); 985 986 #ifdef ALPHA_BOOTBLOCK_CKSUM 987 /* 988 * The Alpha requires that the boot block be checksummed. 989 * <sys/bootblock.h> provides a macro to do it. 990 */ 991 if (sector == 0) { 992 struct alpha_boot_block *bb; 993 994 bb = (struct alpha_boot_block *)(void *)bootarea; 995 bb->bb_cksum = 0; 996 ALPHA_BOOT_BLOCK_CKSUM(bb, &bb->bb_cksum); 997 } 998 #endif /* ALPHA_BOOTBLOCK_CKSUM */ 999 1000 wlen = pwrite(f, bootarea, bootarea_len, sector * (off_t)DEV_BSIZE); 1001 if (wlen == bootarea_len) 1002 return; 1003 if (wlen == -1) 1004 err(1, "disklabel write (sector %u) size %d failed", 1005 sector, bootarea_len); 1006 errx(1, "disklabel write (sector %u) size %d truncated to %d", 1007 sector, bootarea_len, wlen); 1008 } 1009 1010 static int 1011 update_label(int f, u_int label_sector, u_int label_offset) 1012 { 1013 struct disklabel *disk_lp; 1014 1015 disk_lp = find_label(f, label_sector); 1016 1017 if (disk_lp && Dflag) { 1018 /* Invalidate the existing label */ 1019 disk_lp->d_magic ^= ~0u; 1020 disk_lp->d_magic2 ^= ~0u; 1021 if (Dflag == 2) 1022 write_bootarea(f, label_sector); 1023 /* Force label to default location */ 1024 disk_lp = NULL; 1025 } 1026 1027 if (Dflag == 2) 1028 /* We are just deleting the label */ 1029 return 0; 1030 1031 if (disk_lp == NULL) { 1032 if (label_offset == ~0u) 1033 return 0; 1034 /* Nothing on the disk - we need to add it */ 1035 disk_lp = (void *)(bootarea + label_offset); 1036 if ((char *)(disk_lp + 1) > bootarea + bootarea_len) 1037 errx(1, "no space in bootarea (sector %u) " 1038 "to create label", label_sector); 1039 } 1040 1041 htotargetlabel(disk_lp, &lab); 1042 write_bootarea(f, label_sector); 1043 return 1; 1044 } 1045 1046 static void 1047 writelabel_direct(int f) 1048 { 1049 u_int label_sector; 1050 int written = 0; 1051 int rval; 1052 1053 label_sector = get_filecore_partition(f); 1054 if (label_sector != 0) 1055 /* The offset needs to be that from the acorn ports... */ 1056 written = update_label(f, label_sector, DEV_BSIZE); 1057 1058 rval = process_mbr(f, writelabel_mbr); 1059 1060 if (rval == 2 || written) 1061 /* Don't add a label to sector 0, but update one if there */ 1062 update_label(f, 0, ~0u); 1063 else 1064 update_label(f, 0, LABEL_OFFSET); 1065 } 1066 1067 static int 1068 readlabel_direct(int f) 1069 { 1070 struct disklabel *disk_lp; 1071 u_int filecore_partition_offset; 1072 1073 filecore_partition_offset = get_filecore_partition(f); 1074 if (filecore_partition_offset != 0) { 1075 disk_lp = find_label(f, filecore_partition_offset); 1076 if (disk_lp != NULL) { 1077 targettohlabel(&lab, disk_lp); 1078 return 0; 1079 } 1080 } 1081 1082 if (mflag && process_mbr(f, readlabel_mbr) == 0) 1083 return 0; 1084 1085 disk_lp = find_label(f, 0); 1086 if (disk_lp != NULL) { 1087 targettohlabel(&lab, disk_lp); 1088 return 0; 1089 } 1090 1091 if (!mflag && process_mbr(f, readlabel_mbr) == 0) 1092 return 0; 1093 1094 return 1; 1095 } 1096 1097 static void 1098 makedisktab(FILE *f, struct disklabel *lp) 1099 { 1100 int i; 1101 const char *did; 1102 struct partition *pp; 1103 1104 did = "\\\n\t:"; 1105 (void) fprintf(f, "%.*s|Automatically generated label:\\\n\t:dt=", 1106 (int) sizeof(lp->d_typename), lp->d_typename); 1107 if ((unsigned) lp->d_type < DKMAXTYPES) 1108 (void) fprintf(f, "%s:", dktypenames[lp->d_type]); 1109 else 1110 (void) fprintf(f, "unknown%" PRIu16 ":", lp->d_type); 1111 1112 (void) fprintf(f, "se#%" PRIu32 ":", lp->d_secsize); 1113 (void) fprintf(f, "ns#%" PRIu32 ":", lp->d_nsectors); 1114 (void) fprintf(f, "nt#%" PRIu32 ":", lp->d_ntracks); 1115 (void) fprintf(f, "sc#%" PRIu32 ":", lp->d_secpercyl); 1116 (void) fprintf(f, "nc#%" PRIu32 ":", lp->d_ncylinders); 1117 1118 if ((lp->d_secpercyl * lp->d_ncylinders) != lp->d_secperunit) { 1119 (void) fprintf(f, "%ssu#%" PRIu32 ":", did, lp->d_secperunit); 1120 did = ""; 1121 } 1122 if (lp->d_rpm != 3600) { 1123 (void) fprintf(f, "%srm#%" PRIu16 ":", did, lp->d_rpm); 1124 did = ""; 1125 } 1126 if (lp->d_interleave != 1) { 1127 (void) fprintf(f, "%sil#%" PRIu16 ":", did, lp->d_interleave); 1128 did = ""; 1129 } 1130 if (lp->d_trackskew != 0) { 1131 (void) fprintf(f, "%ssk#%" PRIu16 ":", did, lp->d_trackskew); 1132 did = ""; 1133 } 1134 if (lp->d_cylskew != 0) { 1135 (void) fprintf(f, "%scs#%" PRIu16 ":", did, lp->d_cylskew); 1136 did = ""; 1137 } 1138 if (lp->d_headswitch != 0) { 1139 (void) fprintf(f, "%shs#%" PRIu16 ":", did, lp->d_headswitch); 1140 did = ""; 1141 } 1142 if (lp->d_trkseek != 0) { 1143 (void) fprintf(f, "%sts#%" PRIu32 ":", did, lp->d_trkseek); 1144 did = ""; 1145 } 1146 #ifdef notyet 1147 (void) fprintf(f, "drivedata: "); 1148 for (i = NDDATA - 1; i >= 0; i--) 1149 if (lp->d_drivedata[i]) 1150 break; 1151 if (i < 0) 1152 i = 0; 1153 for (j = 0; j <= i; j++) 1154 (void) fprintf(f, "%" PRIu32 " ", lp->d_drivedata[j]); 1155 #endif /* notyet */ 1156 pp = lp->d_partitions; 1157 for (i = 0; i < lp->d_npartitions; i++, pp++) { 1158 if (pp->p_size) { 1159 char c = 'a' + i; 1160 (void) fprintf(f, "\\\n\t:"); 1161 (void) fprintf(f, "p%c#%" PRIu32 ":", c, pp->p_size); 1162 (void) fprintf(f, "o%c#%" PRIu32 ":", c, pp->p_offset); 1163 if (pp->p_fstype != FS_UNUSED) { 1164 if ((unsigned) pp->p_fstype < FSMAXTYPES) 1165 (void) fprintf(f, "t%c=%s:", c, 1166 fstypenames[pp->p_fstype]); 1167 else 1168 (void) fprintf(f, 1169 "t%c=unknown%" PRIu8 ":", 1170 c, pp->p_fstype); 1171 } 1172 switch (pp->p_fstype) { 1173 1174 case FS_UNUSED: 1175 break; 1176 1177 case FS_BSDFFS: 1178 case FS_BSDLFS: 1179 case FS_EX2FS: 1180 case FS_ADOS: 1181 case FS_APPLEUFS: 1182 (void) fprintf(f, "b%c#%" PRIu64 ":", c, 1183 (uint64_t)pp->p_fsize * pp->p_frag); 1184 (void) fprintf(f, "f%c#%" PRIu32 ":", c, 1185 pp->p_fsize); 1186 break; 1187 default: 1188 break; 1189 } 1190 } 1191 } 1192 (void) fprintf(f, "\n"); 1193 (void) fflush(f); 1194 } 1195 1196 static int 1197 edit(int f) 1198 { 1199 const char *tmpdir; 1200 char tmpfil[MAXPATHLEN]; 1201 int first, ch, fd; 1202 int get_ok; 1203 FILE *fp; 1204 1205 if ((tmpdir = getenv("TMPDIR")) == NULL) 1206 tmpdir = _PATH_TMP; 1207 (void)snprintf(tmpfil, sizeof(tmpfil), "%s/%s", tmpdir, TMPFILE); 1208 if ((fd = mkstemp(tmpfil)) == -1 || (fp = fdopen(fd, "w")) == NULL) { 1209 warn("%s", tmpfil); 1210 return (1); 1211 } 1212 (void)fchmod(fd, 0600); 1213 showinfo(fp, &lab, specname); 1214 showpartitions(fp, &lab, Cflag); 1215 (void) fclose(fp); 1216 for (;;) { 1217 if (!editit(tmpfil)) 1218 break; 1219 fp = fopen(tmpfil, "r"); 1220 if (fp == NULL) { 1221 warn("%s", tmpfil); 1222 break; 1223 } 1224 (void) memset(&lab, 0, sizeof(lab)); 1225 get_ok = getasciilabel(fp, &lab); 1226 fclose(fp); 1227 if (get_ok && write_label(f) == 0) { 1228 (void) unlink(tmpfil); 1229 return (0); 1230 } 1231 (void) printf("re-edit the label? [y]: "); 1232 (void) fflush(stdout); 1233 first = ch = getchar(); 1234 while (ch != '\n' && ch != EOF) 1235 ch = getchar(); 1236 if (first == 'n' || first == 'N') 1237 break; 1238 } 1239 (void)unlink(tmpfil); 1240 return (1); 1241 } 1242 1243 static int 1244 editit(const char *tmpfil) 1245 { 1246 int pid, xpid; 1247 int status; 1248 sigset_t nsigset, osigset; 1249 1250 sigemptyset(&nsigset); 1251 sigaddset(&nsigset, SIGINT); 1252 sigaddset(&nsigset, SIGQUIT); 1253 sigaddset(&nsigset, SIGHUP); 1254 sigprocmask(SIG_BLOCK, &nsigset, &osigset); 1255 while ((pid = fork()) < 0) { 1256 if (errno != EAGAIN) { 1257 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 1258 warn("fork"); 1259 return (0); 1260 } 1261 sleep(1); 1262 } 1263 if (pid == 0) { 1264 const char *ed; 1265 char *buf; 1266 int retval; 1267 1268 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 1269 setgid(getgid()); 1270 setuid(getuid()); 1271 if ((ed = getenv("EDITOR")) == (char *)0) 1272 ed = DEFEDITOR; 1273 /* 1274 * Jump through a few extra hoops in case someone's editor 1275 * is "editor arg1 arg2". 1276 */ 1277 asprintf(&buf, "%s %s", ed, tmpfil); 1278 if (!buf) 1279 err(1, "malloc"); 1280 retval = execlp(_PATH_BSHELL, _PATH_BSHELL, "-c", buf, NULL); 1281 if (retval == -1) 1282 perror(ed); 1283 exit(retval); 1284 } 1285 while ((xpid = wait(&status)) >= 0) 1286 if (xpid == pid) 1287 break; 1288 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 1289 return (!status); 1290 } 1291 1292 static char * 1293 skip(char *cp) 1294 { 1295 1296 cp += strspn(cp, " \t"); 1297 if (*cp == '\0') 1298 return (NULL); 1299 return (cp); 1300 } 1301 1302 static char * 1303 word(char *cp) 1304 { 1305 1306 if (cp == NULL || *cp == '\0') 1307 return (NULL); 1308 1309 cp += strcspn(cp, " \t"); 1310 if (*cp == '\0') 1311 return (NULL); 1312 *cp++ = '\0'; 1313 cp += strspn(cp, " \t"); 1314 if (*cp == '\0') 1315 return (NULL); 1316 return (cp); 1317 } 1318 1319 #define _CHECKLINE \ 1320 if (tp == NULL || *tp == '\0') { \ 1321 warnx("line %d: too few fields", lineno); \ 1322 errors++; \ 1323 break; \ 1324 } 1325 1326 #define __CHECKLINE \ 1327 if (*tp == NULL || **tp == '\0') { \ 1328 warnx("line %d: too few fields", lineno); \ 1329 *tp = _error_; \ 1330 return 0; \ 1331 } 1332 1333 static char _error_[] = ""; 1334 #define NXTNUM(n) if ((n = nxtnum(&tp, lineno),0) + tp != _error_) \ 1335 ; else goto error 1336 #define NXTXNUM(n) if ((n = nxtxnum(&tp, lp, lineno),0) + tp != _error_) \ 1337 ; else goto error 1338 1339 static unsigned long 1340 nxtnum(char **tp, int lineno) 1341 { 1342 char *cp; 1343 unsigned long v; 1344 1345 __CHECKLINE 1346 if (getulong(*tp, '\0', &cp, &v, UINT32_MAX) != 0) { 1347 warnx("line %d: syntax error", lineno); 1348 *tp = _error_; 1349 return 0; 1350 } 1351 *tp = cp; 1352 return v; 1353 } 1354 1355 static unsigned long 1356 nxtxnum(char **tp, struct disklabel *lp, int lineno) 1357 { 1358 char *cp, *ncp; 1359 unsigned long n, v; 1360 1361 __CHECKLINE 1362 cp = *tp; 1363 if (getulong(cp, '/', &ncp, &n, UINT32_MAX) != 0) 1364 goto bad; 1365 1366 if (*ncp == '/') { 1367 n *= lp->d_secpercyl; 1368 cp = ncp + 1; 1369 if (getulong(cp, '/', &ncp, &v, UINT32_MAX) != 0) 1370 goto bad; 1371 n += v * lp->d_nsectors; 1372 cp = ncp + 1; 1373 if (getulong(cp, '\0', &ncp, &v, UINT32_MAX) != 0) 1374 goto bad; 1375 n += v; 1376 } 1377 *tp = ncp; 1378 return n; 1379 bad: 1380 warnx("line %d: invalid format", lineno); 1381 *tp = _error_; 1382 return 0; 1383 } 1384 1385 /* 1386 * Read an ascii label in from fd f, 1387 * in the same format as that put out by showinfo() and showpartitions(), 1388 * and fill in lp. 1389 */ 1390 static int 1391 getasciilabel(FILE *f, struct disklabel *lp) 1392 { 1393 const char *const *cpp, *s; 1394 struct partition *pp; 1395 char *cp, *tp, line[BUFSIZ], tbuf[15]; 1396 int lineno, errors; 1397 unsigned long v; 1398 unsigned int part; 1399 1400 lineno = 0; 1401 errors = 0; 1402 lp->d_bbsize = BBSIZE; /* XXX */ 1403 lp->d_sbsize = SBLOCKSIZE; /* XXX */ 1404 while (fgets(line, sizeof(line) - 1, f)) { 1405 lineno++; 1406 if ((cp = strpbrk(line, "#\r\n")) != NULL) 1407 *cp = '\0'; 1408 cp = skip(line); 1409 if (cp == NULL) /* blank line or comment line */ 1410 continue; 1411 tp = strchr(cp, ':'); /* everything has a colon in it */ 1412 if (tp == NULL) { 1413 warnx("line %d: syntax error", lineno); 1414 errors++; 1415 continue; 1416 } 1417 *tp++ = '\0', tp = skip(tp); 1418 if (!strcmp(cp, "type")) { 1419 if (tp == NULL) { 1420 strlcpy(tbuf, "unknown", sizeof(tbuf)); 1421 tp = tbuf; 1422 } 1423 cpp = dktypenames; 1424 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 1425 if ((s = *cpp) && !strcasecmp(s, tp)) { 1426 lp->d_type = cpp - dktypenames; 1427 goto next; 1428 } 1429 if (GETNUM16(tp, &v) != 0) { 1430 warnx("line %d: syntax error", lineno); 1431 errors++; 1432 continue; 1433 } 1434 if (v >= DKMAXTYPES) 1435 warnx("line %d: warning, unknown disk type: %s", 1436 lineno, tp); 1437 lp->d_type = v; 1438 continue; 1439 } 1440 if (!strcmp(cp, "flags")) { 1441 for (v = 0; (cp = tp) && *cp != '\0';) { 1442 tp = word(cp); 1443 if (!strcasecmp(cp, "removable")) 1444 v |= D_REMOVABLE; 1445 else if (!strcasecmp(cp, "ecc")) 1446 v |= D_ECC; 1447 else if (!strcasecmp(cp, "badsect")) 1448 v |= D_BADSECT; 1449 else { 1450 warnx("line %d: bad flag: %s", 1451 lineno, cp); 1452 errors++; 1453 } 1454 } 1455 lp->d_flags = v; 1456 continue; 1457 } 1458 if (!strcmp(cp, "drivedata")) { 1459 int i; 1460 1461 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 1462 if (GETNUM32(cp, &v) != 0) { 1463 warnx("line %d: bad drive data", 1464 lineno); 1465 errors++; 1466 } else 1467 lp->d_drivedata[i] = v; 1468 i++; 1469 tp = word(cp); 1470 } 1471 continue; 1472 } 1473 if (sscanf(cp, "%lu partitions", &v) == 1) { 1474 if (v == 0 || v > MAXPARTITIONS) { 1475 warnx("line %d: bad # of partitions", lineno); 1476 lp->d_npartitions = MAXPARTITIONS; 1477 errors++; 1478 } else 1479 lp->d_npartitions = v; 1480 continue; 1481 } 1482 if (tp == NULL) { 1483 tbuf[0] = '\0'; 1484 tp = tbuf; 1485 } 1486 if (!strcmp(cp, "disk")) { 1487 strncpy(lp->d_typename, tp, sizeof(lp->d_typename)); 1488 continue; 1489 } 1490 if (!strcmp(cp, "label")) { 1491 strncpy(lp->d_packname, tp, sizeof(lp->d_packname)); 1492 continue; 1493 } 1494 if (!strcmp(cp, "bytes/sector")) { 1495 if (GETNUM32(tp, &v) != 0 || v <= 0 || (v % 512) != 0) { 1496 warnx("line %d: bad %s: %s", lineno, cp, tp); 1497 errors++; 1498 } else 1499 lp->d_secsize = v; 1500 continue; 1501 } 1502 if (!strcmp(cp, "sectors/track")) { 1503 if (GETNUM32(tp, &v) != 0) { 1504 warnx("line %d: bad %s: %s", lineno, cp, tp); 1505 errors++; 1506 } else 1507 lp->d_nsectors = v; 1508 continue; 1509 } 1510 if (!strcmp(cp, "sectors/cylinder")) { 1511 if (GETNUM32(tp, &v) != 0) { 1512 warnx("line %d: bad %s: %s", lineno, cp, tp); 1513 errors++; 1514 } else 1515 lp->d_secpercyl = v; 1516 continue; 1517 } 1518 if (!strcmp(cp, "tracks/cylinder")) { 1519 if (GETNUM32(tp, &v) != 0) { 1520 warnx("line %d: bad %s: %s", lineno, cp, tp); 1521 errors++; 1522 } else 1523 lp->d_ntracks = v; 1524 continue; 1525 } 1526 if (!strcmp(cp, "cylinders")) { 1527 if (GETNUM32(tp, &v) != 0) { 1528 warnx("line %d: bad %s: %s", lineno, cp, tp); 1529 errors++; 1530 } else 1531 lp->d_ncylinders = v; 1532 continue; 1533 } 1534 if (!strcmp(cp, "total sectors") || 1535 !strcmp(cp, "sectors/unit")) { 1536 if (GETNUM32(tp, &v) != 0) { 1537 warnx("line %d: bad %s: %s", lineno, cp, tp); 1538 errors++; 1539 } else 1540 lp->d_secperunit = v; 1541 continue; 1542 } 1543 if (!strcmp(cp, "rpm")) { 1544 if (GETNUM16(tp, &v) != 0) { 1545 warnx("line %d: bad %s: %s", lineno, cp, tp); 1546 errors++; 1547 } else 1548 lp->d_rpm = v; 1549 continue; 1550 } 1551 if (!strcmp(cp, "interleave")) { 1552 if (GETNUM16(tp, &v) != 0) { 1553 warnx("line %d: bad %s: %s", lineno, cp, tp); 1554 errors++; 1555 } else 1556 lp->d_interleave = v; 1557 continue; 1558 } 1559 if (!strcmp(cp, "trackskew")) { 1560 if (GETNUM16(tp, &v) != 0) { 1561 warnx("line %d: bad %s: %s", lineno, cp, tp); 1562 errors++; 1563 } else 1564 lp->d_trackskew = v; 1565 continue; 1566 } 1567 if (!strcmp(cp, "cylinderskew")) { 1568 if (GETNUM16(tp, &v) != 0) { 1569 warnx("line %d: bad %s: %s", lineno, cp, tp); 1570 errors++; 1571 } else 1572 lp->d_cylskew = v; 1573 continue; 1574 } 1575 if (!strcmp(cp, "headswitch")) { 1576 if (GETNUM32(tp, &v) != 0) { 1577 warnx("line %d: bad %s: %s", lineno, cp, tp); 1578 errors++; 1579 } else 1580 lp->d_headswitch = v; 1581 continue; 1582 } 1583 if (!strcmp(cp, "track-to-track seek")) { 1584 if (GETNUM32(tp, &v) != 0) { 1585 warnx("line %d: bad %s: %s", lineno, cp, tp); 1586 errors++; 1587 } else 1588 lp->d_trkseek = v; 1589 continue; 1590 } 1591 if ('a' > *cp || *cp > 'z' || cp[1] != '\0') { 1592 warnx("line %d: unknown field: %s", lineno, cp); 1593 errors++; 1594 continue; 1595 } 1596 1597 /* We have a partition entry */ 1598 part = *cp - 'a'; 1599 1600 if (part >= MAXPARTITIONS) { 1601 warnx("line %d: bad partition name: %s", lineno, cp); 1602 errors++; 1603 continue; 1604 } 1605 pp = &lp->d_partitions[part]; 1606 1607 NXTXNUM(pp->p_size); 1608 NXTXNUM(pp->p_offset); 1609 /* can't use word() here because of blanks in fstypenames[] */ 1610 tp += strspn(tp, " \t"); 1611 _CHECKLINE 1612 cp = tp; 1613 cpp = fstypenames; 1614 for (; cpp < &fstypenames[FSMAXTYPES]; cpp++) { 1615 s = *cpp; 1616 if (s == NULL || 1617 (cp[strlen(s)] != ' ' && 1618 cp[strlen(s)] != '\t' && 1619 cp[strlen(s)] != '\0')) 1620 continue; 1621 if (!memcmp(s, cp, strlen(s))) { 1622 pp->p_fstype = cpp - fstypenames; 1623 tp += strlen(s); 1624 if (*tp == '\0') 1625 tp = NULL; 1626 else { 1627 tp += strspn(tp, " \t"); 1628 if (*tp == '\0') 1629 tp = NULL; 1630 } 1631 goto gottype; 1632 } 1633 } 1634 tp = word(cp); 1635 if (isdigit(*cp & 0xff)) { 1636 if (GETNUM8(cp, &v) != 0) { 1637 warnx("line %d: syntax error", lineno); 1638 errors++; 1639 } 1640 } else 1641 v = FSMAXTYPES; 1642 if ((unsigned)v >= FSMAXTYPES) { 1643 warnx("line %d: warning, unknown file system type: %s", 1644 lineno, cp); 1645 warnx("tip: use -l to see all valid file system " 1646 "types"); 1647 v = FS_UNUSED; 1648 } 1649 pp->p_fstype = v; 1650 gottype: 1651 switch (pp->p_fstype) { 1652 1653 case FS_UNUSED: /* XXX */ 1654 NXTNUM(pp->p_fsize); 1655 if (pp->p_fsize == 0) 1656 break; 1657 NXTNUM(v); 1658 pp->p_frag = v / pp->p_fsize; 1659 break; 1660 1661 case FS_BSDFFS: 1662 case FS_ADOS: 1663 case FS_APPLEUFS: 1664 NXTNUM(pp->p_fsize); 1665 if (pp->p_fsize == 0) 1666 break; 1667 NXTNUM(v); 1668 pp->p_frag = v / pp->p_fsize; 1669 NXTNUM(pp->p_cpg); 1670 break; 1671 case FS_BSDLFS: 1672 NXTNUM(pp->p_fsize); 1673 if (pp->p_fsize == 0) 1674 break; 1675 NXTNUM(v); 1676 pp->p_frag = v / pp->p_fsize; 1677 NXTNUM(pp->p_sgs); 1678 break; 1679 case FS_EX2FS: 1680 NXTNUM(pp->p_fsize); 1681 if (pp->p_fsize == 0) 1682 break; 1683 NXTNUM(v); 1684 pp->p_frag = v / pp->p_fsize; 1685 break; 1686 case FS_ISO9660: 1687 NXTNUM(pp->p_cdsession); 1688 break; 1689 default: 1690 break; 1691 } 1692 continue; 1693 error: 1694 errors++; 1695 next: 1696 ; 1697 } 1698 errors += checklabel(lp); 1699 return (errors == 0); 1700 } 1701 1702 /* 1703 * Check disklabel for errors and fill in 1704 * derived fields according to supplied values. 1705 */ 1706 int 1707 checklabel(struct disklabel *lp) 1708 { 1709 struct partition *pp, *qp; 1710 int i, j, errors; 1711 char part; 1712 1713 errors = 0; 1714 if (lp->d_secsize == 0) { 1715 warnx("sector size %" PRIu32, lp->d_secsize); 1716 return (1); 1717 } 1718 if (lp->d_nsectors == 0) { 1719 warnx("sectors/track %" PRIu32, lp->d_nsectors); 1720 return (1); 1721 } 1722 if (lp->d_ntracks == 0) { 1723 warnx("tracks/cylinder %" PRIu32, lp->d_ntracks); 1724 return (1); 1725 } 1726 if (lp->d_ncylinders == 0) { 1727 warnx("cylinders/unit %" PRIu32, lp->d_ncylinders); 1728 errors++; 1729 } 1730 if (lp->d_rpm == 0) 1731 warnx("warning, revolutions/minute %" PRIu16, lp->d_rpm); 1732 if (lp->d_secpercyl == 0) 1733 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1734 if (lp->d_secperunit == 0) 1735 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1736 if (lp->d_bbsize == 0) { 1737 warnx("boot block size %" PRIu32, lp->d_bbsize); 1738 errors++; 1739 } else if (lp->d_bbsize % lp->d_secsize) 1740 warnx("warning, boot block size %% sector-size != 0"); 1741 if (lp->d_sbsize == 0) { 1742 warnx("super block size %" PRIu32, lp->d_sbsize); 1743 errors++; 1744 } else if (lp->d_sbsize % lp->d_secsize) 1745 warnx("warning, super block size %% sector-size != 0"); 1746 if (lp->d_npartitions > MAXPARTITIONS) 1747 warnx("warning, number of partitions (%" PRIu16 ") > " 1748 "MAXPARTITIONS (%d)", 1749 lp->d_npartitions, MAXPARTITIONS); 1750 else 1751 for (i = MAXPARTITIONS - 1; i >= lp->d_npartitions; i--) { 1752 part = 'a' + i; 1753 pp = &lp->d_partitions[i]; 1754 if (pp->p_size || pp->p_offset) { 1755 warnx("warning, partition %c increased " 1756 "number of partitions from %" PRIu16 1757 " to %d", 1758 part, lp->d_npartitions, i + 1); 1759 lp->d_npartitions = i + 1; 1760 break; 1761 } 1762 } 1763 for (i = 0; i < lp->d_npartitions; i++) { 1764 part = 'a' + i; 1765 pp = &lp->d_partitions[i]; 1766 if (pp->p_size == 0 && pp->p_offset != 0) 1767 warnx("warning, partition %c: size 0, but " 1768 "offset %" PRIu32, 1769 part, pp->p_offset); 1770 #ifdef STRICT_CYLINDER_ALIGNMENT 1771 if (pp->p_offset % lp->d_secpercyl) { 1772 warnx("warning, partition %c:" 1773 " not starting on cylinder boundary", 1774 part); 1775 errors++; 1776 } 1777 #endif /* STRICT_CYLINDER_ALIGNMENT */ 1778 if (pp->p_offset > lp->d_secperunit) { 1779 warnx("partition %c: offset past end of unit", part); 1780 errors++; 1781 } 1782 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1783 warnx("partition %c: partition extends" 1784 " past end of unit", 1785 part); 1786 errors++; 1787 } 1788 if (pp->p_fstype != FS_UNUSED) 1789 for (j = i + 1; j < lp->d_npartitions; j++) { 1790 qp = &lp->d_partitions[j]; 1791 if (qp->p_fstype == FS_UNUSED) 1792 continue; 1793 if (pp->p_offset < qp->p_offset + qp->p_size && 1794 qp->p_offset < pp->p_offset + pp->p_size) 1795 warnx("partitions %c and %c overlap", 1796 part, 'a' + j); 1797 } 1798 } 1799 return (errors); 1800 } 1801 1802 static void 1803 usage(void) 1804 { 1805 static const struct { 1806 const char *name; 1807 const char *expn; 1808 } usages[] = { 1809 { "[-ACFrtv] disk", "(to read label)" }, 1810 { "-w [-DFrv] [-f disktab] disk disktype [packid]", "(to write label)" }, 1811 { "-e [-CDFIrv] disk", "(to edit label)" }, 1812 { "-i [-DFIrv] disk", "(to create a label interactively)" }, 1813 { "-D [-v] disk", "(to delete existing label(s))" }, 1814 { "-R [-DFrv] disk protofile", "(to restore label)" }, 1815 { "[-NW] disk", "(to write disable/enable label)" }, 1816 { "-l", "(to show all known file system types)" }, 1817 { NULL, NULL } 1818 }; 1819 int i; 1820 const char *pn = getprogname(); 1821 const char *t = "usage:"; 1822 1823 for (i = 0; usages[i].name != NULL; i++) { 1824 (void)fprintf(stderr, "%s %s %s\n\t%s\n", 1825 t, pn, usages[i].name, usages[i].expn); 1826 t = "or"; 1827 } 1828 exit(1); 1829 } 1830 1831 static int 1832 getulong(const char *str, char sep, char **epp, unsigned long *ul, 1833 unsigned long max) 1834 { 1835 char *ep; 1836 1837 if (epp == NULL) 1838 epp = &ep; 1839 1840 *ul = strtoul(str, epp, 10); 1841 1842 if ((*ul == ULONG_MAX && errno == ERANGE) || *ul > max) 1843 return ERANGE; 1844 1845 if (*str == '\0' || (**epp != '\0' && **epp != sep && 1846 !isspace((unsigned char)**epp))) 1847 return EFTYPE; 1848 1849 return 0; 1850 } 1851 1852 /* 1853 * This is a wrapper over the standard strcmp function to be used with 1854 * qsort on an array of pointers to strings. 1855 */ 1856 static int 1857 qsort_strcmp(const void *v1, const void *v2) 1858 { 1859 const char *const *sp1 = (const char *const *)v1; 1860 const char *const *sp2 = (const char *const *)v2; 1861 1862 return strcmp(*sp1, *sp2); 1863 } 1864 1865 /* 1866 * Prints all know file system types for a partition. 1867 * Returns 1 on success, 0 on failure. 1868 */ 1869 int 1870 list_fs_types(void) 1871 { 1872 int ret; 1873 size_t nelems; 1874 1875 nelems = 0; 1876 { 1877 const char *const *namep; 1878 1879 namep = fstypenames; 1880 while (*namep++ != NULL) 1881 nelems++; 1882 } 1883 1884 ret = 1; 1885 if (nelems > 0) { 1886 const char **list; 1887 size_t i; 1888 1889 list = (const char **)malloc(sizeof(char *) * nelems); 1890 if (list == NULL) { 1891 warnx("sorry, could not allocate memory for list"); 1892 ret = 0; 1893 } else { 1894 for (i = 0; i < nelems; i++) 1895 list[i] = fstypenames[i]; 1896 1897 qsort(list, nelems, sizeof(char *), qsort_strcmp); 1898 1899 for (i = 0; i < nelems; i++) 1900 (void)printf("%s\n", list[i]); 1901 1902 free(list); 1903 } 1904 } 1905 1906 return ret; 1907 } 1908
Indexes created Tue Sep 23 23:09:58 GMT 2025