main.c revision 1.27.2.1
1 /* $NetBSD: main.c,v 1.27.2.1 2013/02/25 00:28:04 tls 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 1.27.2.1 2013/02/25 00:28:04 tls 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 #define GETLABELUSESMBR() LABELUSESMBR 190 #else /* HAVE_NBTOOL_CONFIG_H */ 191 #define GETLABELOFFSET() getlabeloffset() 192 #define GETLABELSECTOR() getlabelsector() 193 #define GETLABELUSESMBR() getlabelusesmbr() 194 #endif 195 196 /* Default location for label - only used if we don't find one to update */ 197 #define LABEL_OFFSET (dklabel_getlabelsector() * DEV_BSIZE + dklabel_getlabeloffset()) 198 199 /* 200 * For portability it doesn't make sense to use any other value.... 201 * Except, maybe, the size of a physical sector. 202 * This value is used if we have to write a label to the start of an mbr ptn. 203 */ 204 #ifndef LABELOFFSET_MBR 205 #define LABELOFFSET_MBR 512 206 #endif 207 208 #if HAVE_NBTOOL_CONFIG_H 209 static int 210 opendisk(const char *path, int flags, char *buf, int buflen, int cooked) 211 { 212 int f; 213 f = open(path, flags, 0); 214 strlcpy(buf, path, buflen); 215 return f; 216 } 217 #endif /* HAVE_NBTOOL_CONFIG_H */ 218 219 static daddr_t 220 dklabel_getlabelsector(void) 221 { 222 unsigned long int nval; 223 char *end; 224 const char *val; 225 226 if ((val = getenv("DISKLABELSECTOR")) == NULL) 227 return GETLABELSECTOR(); 228 if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE) 229 err(EXIT_FAILURE, "DISKLABELSECTOR in environment"); 230 return nval; 231 } 232 233 static off_t 234 dklabel_getlabeloffset(void) 235 { 236 unsigned long int nval; 237 char *end; 238 const char *val; 239 240 if ((val = getenv("DISKLABELOFFSET")) == NULL) 241 return GETLABELOFFSET(); 242 if ((nval = strtoul(val, &end, 10)) == ULONG_MAX && errno == ERANGE) 243 err(EXIT_FAILURE, "DISKLABELOFFSET in environment"); 244 return nval; 245 } 246 247 static void 248 clear_writable(void) 249 { 250 static int zero = 0; 251 dk_ioctl(set_writable_fd, DIOCWLABEL, &zero); 252 } 253 254 int 255 main(int argc, char *argv[]) 256 { 257 FILE *t; 258 int ch, f, error; 259 char *dkname; 260 struct stat sb; 261 int writable; 262 enum { 263 UNSPEC, EDIT, READ, RESTORE, SETWRITABLE, SETREADONLY, 264 WRITE, INTERACT, DELETE 265 } op = UNSPEC, old_op; 266 267 mflag = GETLABELUSESMBR(); 268 if (mflag < 0) { 269 warn("getlabelusesmbr() failed"); 270 mflag = LABELUSESMBR; 271 } 272 #if HAVE_NBTOOL_CONFIG_H 273 /* We must avoid doing any ioctl requests */ 274 Fflag = rflag = 1; 275 #endif 276 277 error = 0; 278 while ((ch = getopt(argc, argv, "ACDFINRWef:ilmrtvw")) != -1) { 279 old_op = op; 280 switch (ch) { 281 case 'A': /* Action all labels */ 282 Aflag = 1; 283 rflag = 1; 284 break; 285 case 'C': /* Display in CHS format */ 286 Cflag = 1; 287 break; 288 case 'D': /* Delete all existing labels */ 289 Dflag = 1; 290 rflag = 1; 291 break; 292 case 'F': /* Treat 'disk' as a regular file */ 293 Fflag = 1; 294 rflag = 1; /* Force direct access */ 295 break; 296 case 'I': /* Use default label if none found */ 297 Iflag = 1; 298 rflag = 1; /* Implies direct access */ 299 break; 300 case 'R': /* Restore label from text file */ 301 op = RESTORE; 302 break; 303 case 'N': /* Disallow writes to label sector */ 304 op = SETREADONLY; 305 break; 306 case 'W': /* Allow writes to label sector */ 307 op = SETWRITABLE; 308 break; 309 case 'e': /* Edit label with $EDITOR */ 310 op = EDIT; 311 break; 312 case 'f': /* Name of disktab file */ 313 if (setdisktab(optarg) == -1) 314 usage(); 315 break; 316 case 'i': /* Edit using built-in editor */ 317 op = INTERACT; 318 break; 319 case 'l': /* List all known file system types and exit */ 320 lflag = 1; 321 break; 322 case 'm': /* Expect disk to have an MBR */ 323 mflag ^= 1; 324 break; 325 case 'r': /* Read/write label directly from disk */ 326 rflag = 1; 327 break; 328 case 't': /* Format output as a disktab entry */ 329 tflag = 1; 330 break; 331 case 'v': /* verbose/diag output */ 332 verbose++; 333 break; 334 case 'w': /* Write label based on disktab entry */ 335 op = WRITE; 336 break; 337 case '?': 338 default: 339 usage(); 340 } 341 if (old_op != UNSPEC && old_op != op) 342 usage(); 343 } 344 argc -= optind; 345 argv += optind; 346 347 if (lflag) 348 exit(list_fs_types() ? EXIT_SUCCESS : EXIT_FAILURE); 349 350 if (op == UNSPEC) 351 op = Dflag ? DELETE : READ; 352 353 if (argc < 1) 354 usage(); 355 356 if (Iflag && op != EDIT && op != INTERACT) 357 usage(); 358 359 dkname = argv[0]; 360 f = opendisk(dkname, op == READ ? O_RDONLY : O_RDWR, 361 specname, sizeof specname, 0); 362 if (f < 0) 363 err(4, "%s", specname); 364 365 if (!Fflag && fstat(f, &sb) == 0 && S_ISREG(sb.st_mode)) 366 Fflag = rflag = 1; 367 368 switch (op) { 369 370 case DELETE: /* Remove all existing labels */ 371 if (argc != 1) 372 usage(); 373 Dflag = 2; 374 writelabel_direct(f); 375 break; 376 377 case EDIT: 378 if (argc != 1) 379 usage(); 380 readlabel(f); 381 error = edit(f); 382 break; 383 384 case INTERACT: 385 if (argc != 1) 386 usage(); 387 readlabel(f); 388 /* 389 * XXX: Fill some default values so checklabel does not fail 390 */ 391 if (lab.d_bbsize == 0) 392 lab.d_bbsize = BBSIZE; 393 if (lab.d_sbsize == 0) 394 lab.d_sbsize = SBLOCKSIZE; 395 interact(&lab, f); 396 break; 397 398 case READ: 399 if (argc != 1) 400 usage(); 401 read_all = Aflag; 402 readlabel(f); 403 if (read_all) 404 /* Label got printed in the bowels of readlabel */ 405 break; 406 if (tflag) 407 makedisktab(stdout, &lab); 408 else { 409 showinfo(stdout, &lab, specname); 410 showpartitions(stdout, &lab, Cflag); 411 } 412 error = checklabel(&lab); 413 if (error) 414 error += 100; 415 break; 416 417 case RESTORE: 418 if (argc != 2) 419 usage(); 420 if (!(t = fopen(argv[1], "r"))) 421 err(4, "%s", argv[1]); 422 if (getasciilabel(t, &lab)) 423 error = write_label(f); 424 else 425 error = 1; 426 break; 427 428 case SETREADONLY: 429 writable = 0; 430 goto do_diocwlabel; 431 case SETWRITABLE: 432 writable = 1; 433 do_diocwlabel: 434 if (argc != 1) 435 usage(); 436 if (dk_ioctl(f, DIOCWLABEL, &writable) < 0) 437 err(4, "ioctl DIOCWLABEL"); 438 break; 439 440 case WRITE: /* Create label from /etc/disktab entry & write */ 441 if (argc < 2 || argc > 3) 442 usage(); 443 makelabel(argv[1], argv[2]); 444 if (checklabel(&lab) == 0) 445 error = write_label(f); 446 else 447 error = 1; 448 break; 449 450 case UNSPEC: 451 usage(); 452 453 } 454 exit(error); 455 } 456 457 /* 458 * Construct a prototype disklabel from /etc/disktab. 459 */ 460 static void 461 makelabel(const char *type, const char *name) 462 { 463 struct disklabel *dp; 464 465 dp = getdiskbyname(type); 466 if (dp == NULL) 467 errx(1, "unknown disk type: %s", type); 468 lab = *dp; 469 470 /* d_packname is union d_boot[01], so zero */ 471 (void)memset(lab.d_packname, 0, sizeof(lab.d_packname)); 472 if (name) 473 (void)strncpy(lab.d_packname, name, sizeof(lab.d_packname)); 474 } 475 476 static int 477 write_label(int f) 478 { 479 int writable; 480 481 lab.d_magic = DISKMAGIC; 482 lab.d_magic2 = DISKMAGIC; 483 lab.d_checksum = 0; 484 lab.d_checksum = dkcksum(&lab); 485 486 if (rflag) { 487 /* Write the label directly to the disk */ 488 489 /* 490 * First set the kernel disk label, 491 * then write a label to the raw disk. 492 * If the SDINFO ioctl fails because it is unimplemented, 493 * keep going; otherwise, the kernel consistency checks 494 * may prevent us from changing the current (in-core) 495 * label. 496 */ 497 if (!Fflag && dk_ioctl(f, DIOCSDINFO, &lab) < 0 && 498 errno != ENODEV && errno != ENOTTY) { 499 l_perror("ioctl DIOCSDINFO"); 500 return (1); 501 } 502 /* 503 * write enable label sector before write (if necessary), 504 * disable after writing. 505 */ 506 writable = 1; 507 if (!Fflag) { 508 if (dk_ioctl(f, DIOCWLABEL, &writable) < 0) 509 perror("ioctl DIOCWLABEL"); 510 set_writable_fd = f; 511 atexit(clear_writable); 512 } 513 514 writelabel_direct(f); 515 516 /* 517 * Now issue a DIOCWDINFO. This will let the kernel convert the 518 * disklabel to some machdep format if needed. 519 */ 520 /* XXX: This is stupid! */ 521 if (!Fflag && dk_ioctl(f, DIOCWDINFO, &lab) < 0) { 522 l_perror("ioctl DIOCWDINFO"); 523 return (1); 524 } 525 } else { 526 /* Get the kernel to write the label */ 527 if (dk_ioctl(f, DIOCWDINFO, &lab) < 0) { 528 l_perror("ioctl DIOCWDINFO"); 529 return (1); 530 } 531 } 532 533 #ifdef VAX_ALTLABELS 534 if (lab.d_type == DTYPE_SMD && lab.d_flags & D_BADSECT && 535 lab.d_secsize == 512) { 536 /* Write the label to the odd sectors of the last track! */ 537 daddr_t alt; 538 int i; 539 uint8_t sec0[512]; 540 541 if (pread(f, sec0, 512, 0) < 512) { 542 warn("read master label to write alternates"); 543 return 0; 544 } 545 546 alt = lab.d_ncylinders * lab.d_secpercyl - lab.d_nsectors; 547 for (i = 1; i < 11 && (uint32_t)i < lab.d_nsectors; i += 2) { 548 if (pwrite(f, sec0, 512, (off_t)(alt + i) * 512) < 512) 549 warn("alternate label %d write", i/2); 550 } 551 } 552 #endif /* VAX_ALTLABELS */ 553 554 return 0; 555 } 556 557 int 558 writelabel(int f, struct disklabel *lp) 559 { 560 if (lp != &lab) 561 lab = *lp; 562 return write_label(f); 563 } 564 565 static void 566 l_perror(const char *s) 567 { 568 569 switch (errno) { 570 571 case ESRCH: 572 warnx("%s: No disk label on disk;\n" 573 "use \"disklabel -I\" to install initial label", s); 574 break; 575 576 case EINVAL: 577 warnx("%s: Label magic number or checksum is wrong!\n" 578 "(disklabel or kernel is out of date?)", s); 579 break; 580 581 case EBUSY: 582 warnx("%s: Open partition would move or shrink", s); 583 break; 584 585 case EXDEV: 586 warnx("%s: Labeled partition or 'a' partition must start" 587 " at beginning of disk", s); 588 break; 589 590 default: 591 warn("%s", s); 592 break; 593 } 594 } 595 596 #ifdef NO_MBR_SUPPORT 597 #define process_mbr(f, action) 1 598 #else 599 /* 600 * Scan DOS/MBR partition table and extended partition list for NetBSD ptns. 601 */ 602 static int 603 process_mbr(int f, int (*action)(int, u_int)) 604 { 605 struct mbr_partition *dp; 606 struct mbr_sector mbr; 607 int rval = 1, res; 608 int part; 609 u_int ext_base, next_ext, this_ext, start; 610 611 ext_base = 0; 612 next_ext = 0; 613 for (;;) { 614 this_ext = next_ext; 615 next_ext = 0; 616 if (verbose > 1) 617 warnx("reading mbr sector %u", this_ext); 618 if (pread(f, &mbr, sizeof mbr, this_ext * (off_t)DEV_BSIZE) 619 != sizeof(mbr)) { 620 if (verbose) 621 warn("Can't read master boot record %u", 622 this_ext); 623 break; 624 } 625 626 /* Check if table is valid. */ 627 if (mbr.mbr_magic != htole16(MBR_MAGIC)) { 628 if (verbose) 629 warnx("Invalid signature in mbr record %u", 630 this_ext); 631 break; 632 } 633 634 dp = &mbr.mbr_parts[0]; 635 636 /* Find NetBSD partition(s). */ 637 for (part = 0; part < MBR_PART_COUNT; dp++, part++) { 638 start = le32toh(dp->mbrp_start); 639 switch (dp->mbrp_type) { 640 #ifdef COMPAT_386BSD_MBRPART 641 case MBR_PTYPE_386BSD: 642 if (ext_base != 0) 643 break; 644 /* FALLTHROUGH */ 645 #endif 646 case MBR_PTYPE_NETBSD: 647 res = action(f, this_ext + start); 648 if (res <= 0) 649 /* Found or failure */ 650 return res; 651 if (res > rval) 652 /* Keep largest value */ 653 rval = res; 654 break; 655 case MBR_PTYPE_EXT: 656 case MBR_PTYPE_EXT_LBA: 657 case MBR_PTYPE_EXT_LNX: 658 next_ext = start; 659 break; 660 default: 661 break; 662 } 663 } 664 if (next_ext == 0) 665 /* No more extended partitions */ 666 break; 667 next_ext += ext_base; 668 if (ext_base == 0) 669 ext_base = next_ext; 670 671 if (next_ext <= this_ext) { 672 if (verbose) 673 warnx("Invalid extended chain %x <= %x", 674 next_ext, this_ext); 675 break; 676 } 677 /* Maybe we should check against the disk size... */ 678 } 679 680 return rval; 681 } 682 683 static int 684 readlabel_mbr(int f, u_int sector) 685 { 686 struct disklabel *disk_lp; 687 688 disk_lp = find_label(f, sector); 689 if (disk_lp == NULL) 690 return 1; 691 targettohlabel(&lab, disk_lp); 692 return 0; 693 } 694 695 static int 696 writelabel_mbr(int f, u_int sector) 697 { 698 return update_label(f, sector, mflag ? LABELOFFSET_MBR : ~0U) ? 2 : 0; 699 } 700 701 #endif /* !NO_MBR_SUPPORT */ 702 703 #ifndef USE_ACORN 704 #define get_filecore_partition(f) 0 705 #else 706 /* 707 * static int filecore_checksum(u_char *bootblock) 708 * 709 * Calculates the filecore boot block checksum. This is used to validate 710 * a filecore boot block on the disk. If a boot block is validated then 711 * it is used to locate the partition table. If the boot block is not 712 * validated, it is assumed that the whole disk is NetBSD. 713 * 714 * The basic algorithm is: 715 * 716 * for (each byte in block, excluding checksum) { 717 * sum += byte; 718 * if (sum > 255) 719 * sum -= 255; 720 * } 721 * 722 * That's equivalent to summing all of the bytes in the block 723 * (excluding the checksum byte, of course), then calculating the 724 * checksum as "cksum = sum - ((sum - 1) / 255) * 255)". That 725 * expression may or may not yield a faster checksum function, 726 * but it's easier to reason about. 727 * 728 * Note that if you have a block filled with bytes of a single 729 * value "X" (regardless of that value!) and calculate the cksum 730 * of the block (excluding the checksum byte), you will _always_ 731 * end up with a checksum of X. (Do the math; that can be derived 732 * from the checksum calculation function!) That means that 733 * blocks which contain bytes which all have the same value will 734 * always checksum properly. That's a _very_ unlikely occurence 735 * (probably impossible, actually) for a valid filecore boot block, 736 * so we treat such blocks as invalid. 737 */ 738 static int 739 filecore_checksum(u_char *bootblock) 740 { 741 u_char byte0, accum_diff; 742 u_int sum; 743 int i; 744 745 sum = 0; 746 accum_diff = 0; 747 byte0 = bootblock[0]; 748 749 /* 750 * Sum the contents of the block, keeping track of whether 751 * or not all bytes are the same. If 'accum_diff' ends up 752 * being zero, all of the bytes are, in fact, the same. 753 */ 754 for (i = 0; i < 511; ++i) { 755 sum += bootblock[i]; 756 accum_diff |= bootblock[i] ^ byte0; 757 } 758 759 /* 760 * Check to see if the checksum byte is the same as the 761 * rest of the bytes, too. (Note that if all of the bytes 762 * are the same except the checksum, a checksum compare 763 * won't succeed, but that's not our problem.) 764 */ 765 accum_diff |= bootblock[i] ^ byte0; 766 767 /* All bytes in block are the same; call it invalid. */ 768 if (accum_diff == 0) 769 return (-1); 770 771 return (sum - ((sum - 1) / 255) * 255); 772 } 773 774 /* 775 * Check for the presence of a RiscOS filecore boot block 776 * indicating an ADFS file system on the disc. 777 * Return the offset to the NetBSD part of the disc if 778 * this can be determined. 779 * This routine will terminate disklabel if the disc 780 * is found to be ADFS only. 781 */ 782 static u_int 783 get_filecore_partition(int f) 784 { 785 struct filecore_bootblock *fcbb; 786 static u_char bb[DEV_BSIZE]; 787 u_int offset; 788 struct riscix_partition_table *riscix_part; 789 int loop; 790 791 if (pread(f, bb, sizeof(bb), (off_t)FILECORE_BOOT_SECTOR * DEV_BSIZE) != sizeof(bb)) 792 err(4, "can't read filecore boot block"); 793 fcbb = (struct filecore_bootblock *)bb; 794 795 /* Check if table is valid. */ 796 if (filecore_checksum(bb) != fcbb->checksum) 797 return (0); 798 799 /* 800 * Check for NetBSD/arm32 (RiscBSD) partition marker. 801 * If found the NetBSD disklabel location is easy. 802 */ 803 offset = (fcbb->partition_cyl_low + (fcbb->partition_cyl_high << 8)) 804 * fcbb->heads * fcbb->secspertrack; 805 806 switch (fcbb->partition_type) { 807 808 case PARTITION_FORMAT_RISCBSD: 809 return (offset); 810 811 case PARTITION_FORMAT_RISCIX: 812 /* 813 * Read the RISCiX partition table and search for the 814 * first partition named "RiscBSD", "NetBSD", or "Empty:" 815 * 816 * XXX is use of 'Empty:' really desirable?! -- cgd 817 */ 818 819 if (pread(f, bb, sizeof(bb), (off_t)offset * DEV_BSIZE) != sizeof(bb)) 820 err(4, "can't read riscix partition table"); 821 riscix_part = (struct riscix_partition_table *)bb; 822 823 for (loop = 0; loop < NRISCIX_PARTITIONS; ++loop) { 824 if (strcmp((char *)riscix_part->partitions[loop].rp_name, 825 "RiscBSD") == 0 || 826 strcmp((char *)riscix_part->partitions[loop].rp_name, 827 "NetBSD") == 0 || 828 strcmp((char *)riscix_part->partitions[loop].rp_name, 829 "Empty:") == 0) { 830 return riscix_part->partitions[loop].rp_start; 831 break; 832 } 833 } 834 /* 835 * Valid filecore boot block, RISCiX partition table 836 * but no NetBSD partition. We should leave this 837 * disc alone. 838 */ 839 errx(4, "cannot label: no NetBSD partition found" 840 " in RISCiX partition table"); 841 842 default: 843 /* 844 * Valid filecore boot block and no non-ADFS partition. 845 * This means that the whole disc is allocated for ADFS 846 * so do not trash ! If the user really wants to put a 847 * NetBSD disklabel on the disc then they should remove 848 * the filecore boot block first with dd. 849 */ 850 errx(4, "cannot label: filecore-only disk" 851 " (no non-ADFS partition)"); 852 } 853 return (0); 854 } 855 #endif /* USE_ACORN */ 856 857 /* 858 * Fetch disklabel for disk to 'lab'. 859 * Use ioctl to get label unless -r flag is given. 860 */ 861 static void 862 readlabel(int f) 863 { 864 if (rflag) { 865 /* Get label directly from disk */ 866 if (readlabel_direct(f) == 0) 867 return; 868 /* 869 * There was no label on the disk. Get the fictious one 870 * as a basis for initialisation. 871 */ 872 if (!Fflag && Iflag && (dk_ioctl(f, DIOCGDINFO, &lab) == 0 || 873 dk_ioctl(f, DIOCGDEFLABEL, &lab) == 0)) 874 return; 875 } else { 876 /* Get label from kernel. */ 877 if (dk_ioctl(f, DIOCGDINFO, &lab) < 0) 878 err(4, "ioctl DIOCGDINFO"); 879 return; 880 } 881 882 if (read_all == 2) 883 /* We actually found one, and printed it... */ 884 exit(0); 885 errx(1, "could not read existing label"); 886 } 887 888 /* 889 * Reading the label from the disk is largely a case of 'hunt the label'. 890 * and since different architectures default to different places there 891 * could even be more than one label that contradict each other! 892 * For now we look in the expected place, then search through likely 893 * other locations. 894 */ 895 static struct disklabel * 896 find_label(int f, u_int sector) 897 { 898 struct disklabel *disk_lp, hlp; 899 int i; 900 u_int offset; 901 const char *is_deleted; 902 903 bootarea_len = pread(f, bootarea, sizeof bootarea, 904 sector * (off_t)DEV_BSIZE); 905 if (bootarea_len <= 0) { 906 if (verbose) 907 warn("failed to read bootarea from sector %u", sector); 908 return NULL; 909 } 910 911 if (verbose > 2) 912 warnx("read sector %u len %d looking for label", 913 sector, bootarea_len); 914 915 /* Check expected offset first */ 916 for (offset = LABEL_OFFSET, i = -4;; offset = i += 4) { 917 is_deleted = ""; 918 disk_lp = (void *)(bootarea + offset); 919 if (i == LABEL_OFFSET) 920 continue; 921 if ((char *)(disk_lp + 1) > bootarea + bootarea_len) 922 break; 923 if (disk_lp->d_magic2 != disk_lp->d_magic) 924 continue; 925 if (read_all && (disk_lp->d_magic == DISKMAGIC_DELETED || 926 disk_lp->d_magic == DISKMAGIC_DELETED_REV)) { 927 disk_lp->d_magic ^= ~0u; 928 disk_lp->d_magic2 ^= ~0u; 929 is_deleted = "deleted "; 930 } 931 if (target32toh(disk_lp->d_magic) != DISKMAGIC) { 932 /* XXX: Do something about byte-swapped labels ? */ 933 if (target32toh(disk_lp->d_magic) == DISKMAGIC_REV && 934 target32toh(disk_lp->d_magic2) == DISKMAGIC_REV) 935 warnx("ignoring %sbyteswapped label" 936 " at offset %u from sector %u", 937 is_deleted, offset, sector); 938 continue; 939 } 940 if (target16toh(disk_lp->d_npartitions) > MAXPARTITIONS || 941 dkcksum_target(disk_lp) != 0) { 942 if (verbose > 0) 943 warnx("corrupt label found at offset %u in " 944 "sector %u", offset, sector); 945 continue; 946 } 947 if (verbose > 1) 948 warnx("%slabel found at offset %u from sector %u", 949 is_deleted, offset, sector); 950 if (!read_all) 951 return disk_lp; 952 953 /* To print all the labels we have to do it here */ 954 /* XXX: maybe we should compare them? */ 955 targettohlabel(&hlp, disk_lp); 956 printf("# %ssector %u offset %u bytes\n", 957 is_deleted, sector, offset); 958 if (tflag) 959 makedisktab(stdout, &hlp); 960 else { 961 showinfo(stdout, &hlp, specname); 962 showpartitions(stdout, &hlp, Cflag); 963 } 964 checklabel(&hlp); 965 htotargetlabel(disk_lp, &hlp); 966 /* Remember we've found a label */ 967 read_all = 2; 968 } 969 return NULL; 970 } 971 972 static void 973 write_bootarea(int f, u_int sector) 974 { 975 int wlen; 976 977 if (bootarea_len <= 0) 978 errx(1, "attempting to write after failed read"); 979 980 #ifdef ALPHA_BOOTBLOCK_CKSUM 981 /* 982 * The Alpha requires that the boot block be checksummed. 983 * <sys/bootblock.h> provides a macro to do it. 984 */ 985 if (sector == 0) { 986 struct alpha_boot_block *bb; 987 988 bb = (struct alpha_boot_block *)(void *)bootarea; 989 bb->bb_cksum = 0; 990 ALPHA_BOOT_BLOCK_CKSUM(bb, &bb->bb_cksum); 991 } 992 #endif /* ALPHA_BOOTBLOCK_CKSUM */ 993 994 wlen = pwrite(f, bootarea, bootarea_len, sector * (off_t)DEV_BSIZE); 995 if (wlen == bootarea_len) 996 return; 997 if (wlen == -1) 998 err(1, "disklabel write (sector %u) size %d failed", 999 sector, bootarea_len); 1000 errx(1, "disklabel write (sector %u) size %d truncated to %d", 1001 sector, bootarea_len, wlen); 1002 } 1003 1004 static int 1005 update_label(int f, u_int label_sector, u_int label_offset) 1006 { 1007 struct disklabel *disk_lp; 1008 1009 disk_lp = find_label(f, label_sector); 1010 1011 if (disk_lp && Dflag) { 1012 /* Invalidate the existing label */ 1013 disk_lp->d_magic ^= ~0u; 1014 disk_lp->d_magic2 ^= ~0u; 1015 if (Dflag == 2) 1016 write_bootarea(f, label_sector); 1017 /* Force label to default location */ 1018 disk_lp = NULL; 1019 } 1020 1021 if (Dflag == 2) 1022 /* We are just deleting the label */ 1023 return 0; 1024 1025 if (disk_lp == NULL) { 1026 if (label_offset == ~0u) 1027 return 0; 1028 /* Nothing on the disk - we need to add it */ 1029 disk_lp = (void *)(bootarea + label_offset); 1030 if ((char *)(disk_lp + 1) > bootarea + bootarea_len) 1031 errx(1, "no space in bootarea (sector %u) " 1032 "to create label", label_sector); 1033 } 1034 1035 htotargetlabel(disk_lp, &lab); 1036 write_bootarea(f, label_sector); 1037 return 1; 1038 } 1039 1040 static void 1041 writelabel_direct(int f) 1042 { 1043 u_int label_sector; 1044 int written = 0; 1045 int rval; 1046 1047 label_sector = get_filecore_partition(f); 1048 if (label_sector != 0) 1049 /* The offset needs to be that from the acorn ports... */ 1050 written = update_label(f, label_sector, DEV_BSIZE); 1051 1052 rval = process_mbr(f, writelabel_mbr); 1053 1054 if (rval == 2 || written) 1055 /* Don't add a label to sector 0, but update one if there */ 1056 update_label(f, 0, ~0u); 1057 else 1058 update_label(f, 0, LABEL_OFFSET); 1059 } 1060 1061 static int 1062 readlabel_direct(int f) 1063 { 1064 struct disklabel *disk_lp; 1065 u_int filecore_partition_offset; 1066 1067 filecore_partition_offset = get_filecore_partition(f); 1068 if (filecore_partition_offset != 0) { 1069 disk_lp = find_label(f, filecore_partition_offset); 1070 if (disk_lp != NULL) { 1071 targettohlabel(&lab, disk_lp); 1072 return 0; 1073 } 1074 } 1075 1076 if (mflag && process_mbr(f, readlabel_mbr) == 0) 1077 return 0; 1078 1079 disk_lp = find_label(f, 0); 1080 if (disk_lp != NULL) { 1081 targettohlabel(&lab, disk_lp); 1082 return 0; 1083 } 1084 1085 if (!mflag && process_mbr(f, readlabel_mbr) == 0) 1086 return 0; 1087 1088 return 1; 1089 } 1090 1091 static void 1092 makedisktab(FILE *f, struct disklabel *lp) 1093 { 1094 int i; 1095 const char *did; 1096 struct partition *pp; 1097 1098 did = "\\\n\t:"; 1099 (void) fprintf(f, "%.*s|Automatically generated label:\\\n\t:dt=", 1100 (int) sizeof(lp->d_typename), lp->d_typename); 1101 if ((unsigned) lp->d_type < DKMAXTYPES) 1102 (void) fprintf(f, "%s:", dktypenames[lp->d_type]); 1103 else 1104 (void) fprintf(f, "unknown%" PRIu16 ":", lp->d_type); 1105 1106 (void) fprintf(f, "se#%" PRIu32 ":", lp->d_secsize); 1107 (void) fprintf(f, "ns#%" PRIu32 ":", lp->d_nsectors); 1108 (void) fprintf(f, "nt#%" PRIu32 ":", lp->d_ntracks); 1109 (void) fprintf(f, "sc#%" PRIu32 ":", lp->d_secpercyl); 1110 (void) fprintf(f, "nc#%" PRIu32 ":", lp->d_ncylinders); 1111 1112 if ((lp->d_secpercyl * lp->d_ncylinders) != lp->d_secperunit) { 1113 (void) fprintf(f, "%ssu#%" PRIu32 ":", did, lp->d_secperunit); 1114 did = ""; 1115 } 1116 if (lp->d_rpm != 3600) { 1117 (void) fprintf(f, "%srm#%" PRIu16 ":", did, lp->d_rpm); 1118 did = ""; 1119 } 1120 if (lp->d_interleave != 1) { 1121 (void) fprintf(f, "%sil#%" PRIu16 ":", did, lp->d_interleave); 1122 did = ""; 1123 } 1124 if (lp->d_trackskew != 0) { 1125 (void) fprintf(f, "%ssk#%" PRIu16 ":", did, lp->d_trackskew); 1126 did = ""; 1127 } 1128 if (lp->d_cylskew != 0) { 1129 (void) fprintf(f, "%scs#%" PRIu16 ":", did, lp->d_cylskew); 1130 did = ""; 1131 } 1132 if (lp->d_headswitch != 0) { 1133 (void) fprintf(f, "%shs#%" PRIu16 ":", did, lp->d_headswitch); 1134 did = ""; 1135 } 1136 if (lp->d_trkseek != 0) { 1137 (void) fprintf(f, "%sts#%" PRIu32 ":", did, lp->d_trkseek); 1138 did = ""; 1139 } 1140 #ifdef notyet 1141 (void) fprintf(f, "drivedata: "); 1142 for (i = NDDATA - 1; i >= 0; i--) 1143 if (lp->d_drivedata[i]) 1144 break; 1145 if (i < 0) 1146 i = 0; 1147 for (j = 0; j <= i; j++) 1148 (void) fprintf(f, "%" PRIu32 " ", lp->d_drivedata[j]); 1149 #endif /* notyet */ 1150 pp = lp->d_partitions; 1151 for (i = 0; i < lp->d_npartitions; i++, pp++) { 1152 if (pp->p_size) { 1153 char c = 'a' + i; 1154 (void) fprintf(f, "\\\n\t:"); 1155 (void) fprintf(f, "p%c#%" PRIu32 ":", c, pp->p_size); 1156 (void) fprintf(f, "o%c#%" PRIu32 ":", c, pp->p_offset); 1157 if (pp->p_fstype != FS_UNUSED) { 1158 if ((unsigned) pp->p_fstype < FSMAXTYPES) 1159 (void) fprintf(f, "t%c=%s:", c, 1160 fstypenames[pp->p_fstype]); 1161 else 1162 (void) fprintf(f, 1163 "t%c=unknown%" PRIu8 ":", 1164 c, pp->p_fstype); 1165 } 1166 switch (pp->p_fstype) { 1167 1168 case FS_UNUSED: 1169 break; 1170 1171 case FS_BSDFFS: 1172 case FS_BSDLFS: 1173 case FS_EX2FS: 1174 case FS_ADOS: 1175 case FS_APPLEUFS: 1176 (void) fprintf(f, "b%c#%" PRIu64 ":", c, 1177 (uint64_t)pp->p_fsize * pp->p_frag); 1178 (void) fprintf(f, "f%c#%" PRIu32 ":", c, 1179 pp->p_fsize); 1180 break; 1181 default: 1182 break; 1183 } 1184 } 1185 } 1186 (void) fprintf(f, "\n"); 1187 (void) fflush(f); 1188 } 1189 1190 static int 1191 edit(int f) 1192 { 1193 const char *tmpdir; 1194 char tmpfil[MAXPATHLEN]; 1195 int first, ch, fd; 1196 int get_ok; 1197 FILE *fp; 1198 1199 if ((tmpdir = getenv("TMPDIR")) == NULL) 1200 tmpdir = _PATH_TMP; 1201 (void)snprintf(tmpfil, sizeof(tmpfil), "%s/%s", tmpdir, TMPFILE); 1202 if ((fd = mkstemp(tmpfil)) == -1 || (fp = fdopen(fd, "w")) == NULL) { 1203 warn("%s", tmpfil); 1204 return (1); 1205 } 1206 (void)fchmod(fd, 0600); 1207 showinfo(fp, &lab, specname); 1208 showpartitions(fp, &lab, Cflag); 1209 (void) fclose(fp); 1210 for (;;) { 1211 if (!editit(tmpfil)) 1212 break; 1213 fp = fopen(tmpfil, "r"); 1214 if (fp == NULL) { 1215 warn("%s", tmpfil); 1216 break; 1217 } 1218 (void) memset(&lab, 0, sizeof(lab)); 1219 get_ok = getasciilabel(fp, &lab); 1220 fclose(fp); 1221 if (get_ok && write_label(f) == 0) { 1222 (void) unlink(tmpfil); 1223 return (0); 1224 } 1225 (void) printf("re-edit the label? [y]: "); 1226 (void) fflush(stdout); 1227 first = ch = getchar(); 1228 while (ch != '\n' && ch != EOF) 1229 ch = getchar(); 1230 if (first == 'n' || first == 'N') 1231 break; 1232 } 1233 (void)unlink(tmpfil); 1234 return (1); 1235 } 1236 1237 static int 1238 editit(const char *tmpfil) 1239 { 1240 int pid, xpid; 1241 int status; 1242 sigset_t nsigset, osigset; 1243 1244 sigemptyset(&nsigset); 1245 sigaddset(&nsigset, SIGINT); 1246 sigaddset(&nsigset, SIGQUIT); 1247 sigaddset(&nsigset, SIGHUP); 1248 sigprocmask(SIG_BLOCK, &nsigset, &osigset); 1249 while ((pid = fork()) < 0) { 1250 if (errno != EAGAIN) { 1251 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 1252 warn("fork"); 1253 return (0); 1254 } 1255 sleep(1); 1256 } 1257 if (pid == 0) { 1258 const char *ed; 1259 char *buf; 1260 int retval; 1261 1262 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 1263 setgid(getgid()); 1264 setuid(getuid()); 1265 if ((ed = getenv("EDITOR")) == (char *)0) 1266 ed = DEFEDITOR; 1267 /* 1268 * Jump through a few extra hoops in case someone's editor 1269 * is "editor arg1 arg2". 1270 */ 1271 asprintf(&buf, "%s %s", ed, tmpfil); 1272 if (!buf) 1273 err(1, "malloc"); 1274 retval = execlp(_PATH_BSHELL, _PATH_BSHELL, "-c", buf, NULL); 1275 if (retval == -1) 1276 perror(ed); 1277 exit(retval); 1278 } 1279 while ((xpid = wait(&status)) >= 0) 1280 if (xpid == pid) 1281 break; 1282 sigprocmask(SIG_SETMASK, &osigset, (sigset_t *)0); 1283 return (!status); 1284 } 1285 1286 static char * 1287 skip(char *cp) 1288 { 1289 1290 cp += strspn(cp, " \t"); 1291 if (*cp == '\0') 1292 return (NULL); 1293 return (cp); 1294 } 1295 1296 static char * 1297 word(char *cp) 1298 { 1299 1300 if (cp == NULL || *cp == '\0') 1301 return (NULL); 1302 1303 cp += strcspn(cp, " \t"); 1304 if (*cp == '\0') 1305 return (NULL); 1306 *cp++ = '\0'; 1307 cp += strspn(cp, " \t"); 1308 if (*cp == '\0') 1309 return (NULL); 1310 return (cp); 1311 } 1312 1313 #define _CHECKLINE \ 1314 if (tp == NULL || *tp == '\0') { \ 1315 warnx("line %d: too few fields", lineno); \ 1316 errors++; \ 1317 break; \ 1318 } 1319 1320 #define __CHECKLINE \ 1321 if (*tp == NULL || **tp == '\0') { \ 1322 warnx("line %d: too few fields", lineno); \ 1323 *tp = _error_; \ 1324 return 0; \ 1325 } 1326 1327 static char _error_[] = ""; 1328 #define NXTNUM(n) if ((n = nxtnum(&tp, lineno),0) + tp != _error_) \ 1329 ; else goto error 1330 #define NXTXNUM(n) if ((n = nxtxnum(&tp, lp, lineno),0) + tp != _error_) \ 1331 ; else goto error 1332 1333 static unsigned long 1334 nxtnum(char **tp, int lineno) 1335 { 1336 char *cp; 1337 unsigned long v; 1338 1339 __CHECKLINE 1340 if (getulong(*tp, '\0', &cp, &v, UINT32_MAX) != 0) { 1341 warnx("line %d: syntax error", lineno); 1342 *tp = _error_; 1343 return 0; 1344 } 1345 *tp = cp; 1346 return v; 1347 } 1348 1349 static unsigned long 1350 nxtxnum(char **tp, struct disklabel *lp, int lineno) 1351 { 1352 char *cp, *ncp; 1353 unsigned long n, v; 1354 1355 __CHECKLINE 1356 cp = *tp; 1357 if (getulong(cp, '/', &ncp, &n, UINT32_MAX) != 0) 1358 goto bad; 1359 1360 if (*ncp == '/') { 1361 n *= lp->d_secpercyl; 1362 cp = ncp + 1; 1363 if (getulong(cp, '/', &ncp, &v, UINT32_MAX) != 0) 1364 goto bad; 1365 n += v * lp->d_nsectors; 1366 cp = ncp + 1; 1367 if (getulong(cp, '\0', &ncp, &v, UINT32_MAX) != 0) 1368 goto bad; 1369 n += v; 1370 } 1371 *tp = ncp; 1372 return n; 1373 bad: 1374 warnx("line %d: invalid format", lineno); 1375 *tp = _error_; 1376 return 0; 1377 } 1378 1379 /* 1380 * Read an ascii label in from fd f, 1381 * in the same format as that put out by showinfo() and showpartitions(), 1382 * and fill in lp. 1383 */ 1384 static int 1385 getasciilabel(FILE *f, struct disklabel *lp) 1386 { 1387 const char *const *cpp, *s; 1388 struct partition *pp; 1389 char *cp, *tp, line[BUFSIZ], tbuf[15]; 1390 int lineno, errors; 1391 unsigned long v; 1392 unsigned int part; 1393 1394 lineno = 0; 1395 errors = 0; 1396 lp->d_bbsize = BBSIZE; /* XXX */ 1397 lp->d_sbsize = SBLOCKSIZE; /* XXX */ 1398 while (fgets(line, sizeof(line) - 1, f)) { 1399 lineno++; 1400 if ((cp = strpbrk(line, "#\r\n")) != NULL) 1401 *cp = '\0'; 1402 cp = skip(line); 1403 if (cp == NULL) /* blank line or comment line */ 1404 continue; 1405 tp = strchr(cp, ':'); /* everything has a colon in it */ 1406 if (tp == NULL) { 1407 warnx("line %d: syntax error", lineno); 1408 errors++; 1409 continue; 1410 } 1411 *tp++ = '\0', tp = skip(tp); 1412 if (!strcmp(cp, "type")) { 1413 if (tp == NULL) { 1414 strlcpy(tbuf, "unknown", sizeof(tbuf)); 1415 tp = tbuf; 1416 } 1417 cpp = dktypenames; 1418 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) 1419 if ((s = *cpp) && !strcasecmp(s, tp)) { 1420 lp->d_type = cpp - dktypenames; 1421 goto next; 1422 } 1423 if (GETNUM16(tp, &v) != 0) { 1424 warnx("line %d: syntax error", lineno); 1425 errors++; 1426 continue; 1427 } 1428 if (v >= DKMAXTYPES) 1429 warnx("line %d: warning, unknown disk type: %s", 1430 lineno, tp); 1431 lp->d_type = v; 1432 continue; 1433 } 1434 if (!strcmp(cp, "flags")) { 1435 for (v = 0; (cp = tp) && *cp != '\0';) { 1436 tp = word(cp); 1437 if (!strcasecmp(cp, "removable")) 1438 v |= D_REMOVABLE; 1439 else if (!strcasecmp(cp, "ecc")) 1440 v |= D_ECC; 1441 else if (!strcasecmp(cp, "badsect")) 1442 v |= D_BADSECT; 1443 else { 1444 warnx("line %d: bad flag: %s", 1445 lineno, cp); 1446 errors++; 1447 } 1448 } 1449 lp->d_flags = v; 1450 continue; 1451 } 1452 if (!strcmp(cp, "drivedata")) { 1453 int i; 1454 1455 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) { 1456 if (GETNUM32(cp, &v) != 0) { 1457 warnx("line %d: bad drive data", 1458 lineno); 1459 errors++; 1460 } else 1461 lp->d_drivedata[i] = v; 1462 i++; 1463 tp = word(cp); 1464 } 1465 continue; 1466 } 1467 if (sscanf(cp, "%lu partitions", &v) == 1) { 1468 if (v == 0 || v > MAXPARTITIONS) { 1469 warnx("line %d: bad # of partitions", lineno); 1470 lp->d_npartitions = MAXPARTITIONS; 1471 errors++; 1472 } else 1473 lp->d_npartitions = v; 1474 continue; 1475 } 1476 if (tp == NULL) { 1477 tbuf[0] = '\0'; 1478 tp = tbuf; 1479 } 1480 if (!strcmp(cp, "disk")) { 1481 strncpy(lp->d_typename, tp, sizeof(lp->d_typename)); 1482 continue; 1483 } 1484 if (!strcmp(cp, "label")) { 1485 strncpy(lp->d_packname, tp, sizeof(lp->d_packname)); 1486 continue; 1487 } 1488 if (!strcmp(cp, "bytes/sector")) { 1489 if (GETNUM32(tp, &v) != 0 || v <= 0 || (v % 512) != 0) { 1490 warnx("line %d: bad %s: %s", lineno, cp, tp); 1491 errors++; 1492 } else 1493 lp->d_secsize = v; 1494 continue; 1495 } 1496 if (!strcmp(cp, "sectors/track")) { 1497 if (GETNUM32(tp, &v) != 0) { 1498 warnx("line %d: bad %s: %s", lineno, cp, tp); 1499 errors++; 1500 } else 1501 lp->d_nsectors = v; 1502 continue; 1503 } 1504 if (!strcmp(cp, "sectors/cylinder")) { 1505 if (GETNUM32(tp, &v) != 0) { 1506 warnx("line %d: bad %s: %s", lineno, cp, tp); 1507 errors++; 1508 } else 1509 lp->d_secpercyl = v; 1510 continue; 1511 } 1512 if (!strcmp(cp, "tracks/cylinder")) { 1513 if (GETNUM32(tp, &v) != 0) { 1514 warnx("line %d: bad %s: %s", lineno, cp, tp); 1515 errors++; 1516 } else 1517 lp->d_ntracks = v; 1518 continue; 1519 } 1520 if (!strcmp(cp, "cylinders")) { 1521 if (GETNUM32(tp, &v) != 0) { 1522 warnx("line %d: bad %s: %s", lineno, cp, tp); 1523 errors++; 1524 } else 1525 lp->d_ncylinders = v; 1526 continue; 1527 } 1528 if (!strcmp(cp, "total sectors") || 1529 !strcmp(cp, "sectors/unit")) { 1530 if (GETNUM32(tp, &v) != 0) { 1531 warnx("line %d: bad %s: %s", lineno, cp, tp); 1532 errors++; 1533 } else 1534 lp->d_secperunit = v; 1535 continue; 1536 } 1537 if (!strcmp(cp, "rpm")) { 1538 if (GETNUM16(tp, &v) != 0) { 1539 warnx("line %d: bad %s: %s", lineno, cp, tp); 1540 errors++; 1541 } else 1542 lp->d_rpm = v; 1543 continue; 1544 } 1545 if (!strcmp(cp, "interleave")) { 1546 if (GETNUM16(tp, &v) != 0) { 1547 warnx("line %d: bad %s: %s", lineno, cp, tp); 1548 errors++; 1549 } else 1550 lp->d_interleave = v; 1551 continue; 1552 } 1553 if (!strcmp(cp, "trackskew")) { 1554 if (GETNUM16(tp, &v) != 0) { 1555 warnx("line %d: bad %s: %s", lineno, cp, tp); 1556 errors++; 1557 } else 1558 lp->d_trackskew = v; 1559 continue; 1560 } 1561 if (!strcmp(cp, "cylinderskew")) { 1562 if (GETNUM16(tp, &v) != 0) { 1563 warnx("line %d: bad %s: %s", lineno, cp, tp); 1564 errors++; 1565 } else 1566 lp->d_cylskew = v; 1567 continue; 1568 } 1569 if (!strcmp(cp, "headswitch")) { 1570 if (GETNUM32(tp, &v) != 0) { 1571 warnx("line %d: bad %s: %s", lineno, cp, tp); 1572 errors++; 1573 } else 1574 lp->d_headswitch = v; 1575 continue; 1576 } 1577 if (!strcmp(cp, "track-to-track seek")) { 1578 if (GETNUM32(tp, &v) != 0) { 1579 warnx("line %d: bad %s: %s", lineno, cp, tp); 1580 errors++; 1581 } else 1582 lp->d_trkseek = v; 1583 continue; 1584 } 1585 if ('a' > *cp || *cp > 'z' || cp[1] != '\0') { 1586 warnx("line %d: unknown field: %s", lineno, cp); 1587 errors++; 1588 continue; 1589 } 1590 1591 /* We have a partition entry */ 1592 part = *cp - 'a'; 1593 1594 if (part >= MAXPARTITIONS) { 1595 warnx("line %d: bad partition name: %s", lineno, cp); 1596 errors++; 1597 continue; 1598 } 1599 pp = &lp->d_partitions[part]; 1600 1601 NXTXNUM(pp->p_size); 1602 NXTXNUM(pp->p_offset); 1603 /* can't use word() here because of blanks in fstypenames[] */ 1604 tp += strspn(tp, " \t"); 1605 _CHECKLINE 1606 cp = tp; 1607 cpp = fstypenames; 1608 for (; cpp < &fstypenames[FSMAXTYPES]; cpp++) { 1609 s = *cpp; 1610 if (s == NULL || 1611 (cp[strlen(s)] != ' ' && 1612 cp[strlen(s)] != '\t' && 1613 cp[strlen(s)] != '\0')) 1614 continue; 1615 if (!memcmp(s, cp, strlen(s))) { 1616 pp->p_fstype = cpp - fstypenames; 1617 tp += strlen(s); 1618 if (*tp == '\0') 1619 tp = NULL; 1620 else { 1621 tp += strspn(tp, " \t"); 1622 if (*tp == '\0') 1623 tp = NULL; 1624 } 1625 goto gottype; 1626 } 1627 } 1628 tp = word(cp); 1629 if (isdigit(*cp & 0xff)) { 1630 if (GETNUM8(cp, &v) != 0) { 1631 warnx("line %d: syntax error", lineno); 1632 errors++; 1633 } 1634 } else 1635 v = FSMAXTYPES; 1636 if ((unsigned)v >= FSMAXTYPES) { 1637 warnx("line %d: warning, unknown file system type: %s", 1638 lineno, cp); 1639 warnx("tip: use -l to see all valid file system " 1640 "types"); 1641 v = FS_UNUSED; 1642 } 1643 pp->p_fstype = v; 1644 gottype: 1645 switch (pp->p_fstype) { 1646 1647 case FS_UNUSED: /* XXX */ 1648 NXTNUM(pp->p_fsize); 1649 if (pp->p_fsize == 0) 1650 break; 1651 NXTNUM(v); 1652 pp->p_frag = v / pp->p_fsize; 1653 break; 1654 1655 case FS_BSDFFS: 1656 case FS_ADOS: 1657 case FS_APPLEUFS: 1658 NXTNUM(pp->p_fsize); 1659 if (pp->p_fsize == 0) 1660 break; 1661 NXTNUM(v); 1662 pp->p_frag = v / pp->p_fsize; 1663 NXTNUM(pp->p_cpg); 1664 break; 1665 case FS_BSDLFS: 1666 NXTNUM(pp->p_fsize); 1667 if (pp->p_fsize == 0) 1668 break; 1669 NXTNUM(v); 1670 pp->p_frag = v / pp->p_fsize; 1671 NXTNUM(pp->p_sgs); 1672 break; 1673 case FS_EX2FS: 1674 NXTNUM(pp->p_fsize); 1675 if (pp->p_fsize == 0) 1676 break; 1677 NXTNUM(v); 1678 pp->p_frag = v / pp->p_fsize; 1679 break; 1680 case FS_ISO9660: 1681 NXTNUM(pp->p_cdsession); 1682 break; 1683 default: 1684 break; 1685 } 1686 continue; 1687 error: 1688 errors++; 1689 next: 1690 ; 1691 } 1692 errors += checklabel(lp); 1693 return (errors == 0); 1694 } 1695 1696 /* 1697 * Check disklabel for errors and fill in 1698 * derived fields according to supplied values. 1699 */ 1700 int 1701 checklabel(struct disklabel *lp) 1702 { 1703 struct partition *pp, *qp; 1704 int i, j, errors; 1705 char part; 1706 1707 errors = 0; 1708 if (lp->d_secsize == 0) { 1709 warnx("sector size %" PRIu32, lp->d_secsize); 1710 return (1); 1711 } 1712 if (lp->d_nsectors == 0) { 1713 warnx("sectors/track %" PRIu32, lp->d_nsectors); 1714 return (1); 1715 } 1716 if (lp->d_ntracks == 0) { 1717 warnx("tracks/cylinder %" PRIu32, lp->d_ntracks); 1718 return (1); 1719 } 1720 if (lp->d_ncylinders == 0) { 1721 warnx("cylinders/unit %" PRIu32, lp->d_ncylinders); 1722 errors++; 1723 } 1724 if (lp->d_rpm == 0) 1725 warnx("warning, revolutions/minute %" PRIu16, lp->d_rpm); 1726 if (lp->d_secpercyl == 0) 1727 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1728 if (lp->d_secperunit == 0) 1729 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1730 if (lp->d_bbsize == 0) { 1731 warnx("boot block size %" PRIu32, lp->d_bbsize); 1732 errors++; 1733 } else if (lp->d_bbsize % lp->d_secsize) 1734 warnx("warning, boot block size %% sector-size != 0"); 1735 if (lp->d_sbsize == 0) { 1736 warnx("super block size %" PRIu32, lp->d_sbsize); 1737 errors++; 1738 } else if (lp->d_sbsize % lp->d_secsize) 1739 warnx("warning, super block size %% sector-size != 0"); 1740 if (lp->d_npartitions > MAXPARTITIONS) 1741 warnx("warning, number of partitions (%" PRIu16 ") > " 1742 "MAXPARTITIONS (%d)", 1743 lp->d_npartitions, MAXPARTITIONS); 1744 else 1745 for (i = MAXPARTITIONS - 1; i >= lp->d_npartitions; i--) { 1746 part = 'a' + i; 1747 pp = &lp->d_partitions[i]; 1748 if (pp->p_size || pp->p_offset) { 1749 warnx("warning, partition %c increased " 1750 "number of partitions from %" PRIu16 1751 " to %d", 1752 part, lp->d_npartitions, i + 1); 1753 lp->d_npartitions = i + 1; 1754 break; 1755 } 1756 } 1757 for (i = 0; i < lp->d_npartitions; i++) { 1758 part = 'a' + i; 1759 pp = &lp->d_partitions[i]; 1760 if (pp->p_size == 0 && pp->p_offset != 0) 1761 warnx("warning, partition %c: size 0, but " 1762 "offset %" PRIu32, 1763 part, pp->p_offset); 1764 #ifdef STRICT_CYLINDER_ALIGNMENT 1765 if (pp->p_offset % lp->d_secpercyl) { 1766 warnx("warning, partition %c:" 1767 " not starting on cylinder boundary", 1768 part); 1769 errors++; 1770 } 1771 #endif /* STRICT_CYLINDER_ALIGNMENT */ 1772 if (pp->p_offset > lp->d_secperunit) { 1773 warnx("partition %c: offset past end of unit", part); 1774 errors++; 1775 } 1776 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1777 warnx("partition %c: partition extends" 1778 " past end of unit", 1779 part); 1780 errors++; 1781 } 1782 if (pp->p_fstype != FS_UNUSED) 1783 for (j = i + 1; j < lp->d_npartitions; j++) { 1784 qp = &lp->d_partitions[j]; 1785 if (qp->p_fstype == FS_UNUSED) 1786 continue; 1787 if (pp->p_offset < qp->p_offset + qp->p_size && 1788 qp->p_offset < pp->p_offset + pp->p_size) 1789 warnx("partitions %c and %c overlap", 1790 part, 'a' + j); 1791 } 1792 } 1793 return (errors); 1794 } 1795 1796 static void 1797 usage(void) 1798 { 1799 static const struct { 1800 const char *name; 1801 const char *expn; 1802 } usages[] = { 1803 { "[-ACFrtv] disk", "(to read label)" }, 1804 { "-w [-DFrv] [-f disktab] disk disktype [packid]", "(to write label)" }, 1805 { "-e [-CDFIrv] disk", "(to edit label)" }, 1806 { "-i [-DFIrv] disk", "(to create a label interactively)" }, 1807 { "-D [-v] disk", "(to delete existing label(s))" }, 1808 { "-R [-DFrv] disk protofile", "(to restore label)" }, 1809 { "[-NW] disk", "(to write disable/enable label)" }, 1810 { "-l", "(to show all known file system types)" }, 1811 { NULL, NULL } 1812 }; 1813 int i; 1814 const char *pn = getprogname(); 1815 const char *t = "usage:"; 1816 1817 for (i = 0; usages[i].name != NULL; i++) { 1818 (void)fprintf(stderr, "%s %s %s\n\t%s\n", 1819 t, pn, usages[i].name, usages[i].expn); 1820 t = "or"; 1821 } 1822 exit(1); 1823 } 1824 1825 static int 1826 getulong(const char *str, char sep, char **epp, unsigned long *ul, 1827 unsigned long max) 1828 { 1829 char *ep; 1830 1831 if (epp == NULL) 1832 epp = &ep; 1833 1834 *ul = strtoul(str, epp, 10); 1835 1836 if ((*ul == ULONG_MAX && errno == ERANGE) || *ul > max) 1837 return ERANGE; 1838 1839 if (*str == '\0' || (**epp != '\0' && **epp != sep && 1840 !isspace((unsigned char)**epp))) 1841 return EFTYPE; 1842 1843 return 0; 1844 } 1845 1846 /* 1847 * This is a wrapper over the standard strcmp function to be used with 1848 * qsort on an array of pointers to strings. 1849 */ 1850 static int 1851 qsort_strcmp(const void *v1, const void *v2) 1852 { 1853 const char *const *sp1 = (const char *const *)v1; 1854 const char *const *sp2 = (const char *const *)v2; 1855 1856 return strcmp(*sp1, *sp2); 1857 } 1858 1859 /* 1860 * Prints all know file system types for a partition. 1861 * Returns 1 on success, 0 on failure. 1862 */ 1863 int 1864 list_fs_types(void) 1865 { 1866 int ret; 1867 size_t nelems; 1868 1869 nelems = 0; 1870 { 1871 const char *const *namep; 1872 1873 namep = fstypenames; 1874 while (*namep++ != NULL) 1875 nelems++; 1876 } 1877 1878 ret = 1; 1879 if (nelems > 0) { 1880 const char **list; 1881 size_t i; 1882 1883 list = (const char **)malloc(sizeof(char *) * nelems); 1884 if (list == NULL) { 1885 warnx("sorry, could not allocate memory for list"); 1886 ret = 0; 1887 } else { 1888 for (i = 0; i < nelems; i++) 1889 list[i] = fstypenames[i]; 1890 1891 qsort(list, nelems, sizeof(char *), qsort_strcmp); 1892 1893 for (i = 0; i < nelems; i++) 1894 (void)printf("%s\n", list[i]); 1895 1896 free(list); 1897 } 1898 } 1899 1900 return ret; 1901 } 1902
Indexes created Thu Oct 02 10:09:58 GMT 2025