The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | /* $NetBSD: newfs_msdos.c,v 1.18.2.1 2005/05/01 18:44:02 tron Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1998 Robert Nordier |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in |
| 14 | * the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS |
| 18 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY |
| 21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| 23 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| 25 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 27 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #define __USE_FILE_OFFSET64 |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/param.h> |
| 36 | #ifdef __FreeBSD__ |
| 37 | #include <sys/diskslice.h> |
| 38 | #endif |
| 39 | #include <sys/mount.h> |
| 40 | #include <sys/stat.h> |
| 41 | #include <sys/time.h> |
| 42 | #include <sys/ioctl.h> |
| 43 | |
| 44 | #include <ctype.h> |
| 45 | #include <err.h> |
| 46 | #include <errno.h> |
| 47 | #include <fcntl.h> |
| 48 | #include <paths.h> |
| 49 | #include <stdio.h> |
| 50 | #include <stdlib.h> |
| 51 | #include <string.h> |
| 52 | #include <time.h> |
| 53 | #include <unistd.h> |
| 54 | #ifdef __NetBSD__ |
| 55 | #include <disktab.h> |
| 56 | #include <util.h> |
| 57 | #endif |
| 58 | |
| 59 | #define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ |
| 60 | #define BPN 4 /* bits per nibble */ |
| 61 | #define NPB 2 /* nibbles per byte */ |
| 62 | |
| 63 | #define DOSMAGIC 0xaa55 /* DOS magic number */ |
| 64 | #define MINBPS 128 /* minimum bytes per sector */ |
| 65 | #define MAXSPC 128 /* maximum sectors per cluster */ |
| 66 | #define MAXNFT 16 /* maximum number of FATs */ |
| 67 | #define DEFBLK 4096 /* default block size */ |
| 68 | #define DEFBLK16 2048 /* default block size FAT16 */ |
| 69 | #define DEFRDE 512 /* default root directory entries */ |
| 70 | #define RESFTE 2 /* reserved FAT entries */ |
| 71 | #define MINCLS12 1 /* minimum FAT12 clusters */ |
| 72 | #define MINCLS16 0x1000 /* minimum FAT16 clusters */ |
| 73 | #define MINCLS32 2 /* minimum FAT32 clusters */ |
| 74 | #define MAXCLS12 0xfed /* maximum FAT12 clusters */ |
| 75 | #define MAXCLS16 0xfff5 /* maximum FAT16 clusters */ |
| 76 | #define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */ |
| 77 | |
| 78 | #define mincls(fat) ((fat) == 12 ? MINCLS12 : \ |
| 79 | (fat) == 16 ? MINCLS16 : \ |
| 80 | MINCLS32) |
| 81 | |
| 82 | #define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ |
| 83 | (fat) == 16 ? MAXCLS16 : \ |
| 84 | MAXCLS32) |
| 85 | |
| 86 | #define mk1(p, x) \ |
| 87 | (p) = (u_int8_t)(x) |
| 88 | |
| 89 | #define mk2(p, x) \ |
| 90 | (p)[0] = (u_int8_t)(x), \ |
| 91 | (p)[1] = (u_int8_t)((x) >> 010) |
| 92 | |
| 93 | #define mk4(p, x) \ |
| 94 | (p)[0] = (u_int8_t)(x), \ |
| 95 | (p)[1] = (u_int8_t)((x) >> 010), \ |
| 96 | (p)[2] = (u_int8_t)((x) >> 020), \ |
| 97 | (p)[3] = (u_int8_t)((x) >> 030) |
| 98 | |
| 99 | #define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) |
| 100 | #define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) |
| 101 | #define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) |
| 102 | #define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) |
| 103 | |
| 104 | #ifndef MAX |
| 105 | #define MAX(x, y) ((x) > (y) ? (x) : (y)) |
| 106 | #endif |
| 107 | #ifndef MIN |
| 108 | #define MIN(x, y) ((x) < (y) ? (x) : (y)) |
| 109 | #endif |
| 110 | |
| 111 | static int powerof2(int x) { |
| 112 | int i; |
| 113 | for (i = 0; i < 32; i++) { |
| 114 | if (x & 1) { |
| 115 | x >>= 1; |
| 116 | // if x is zero, then original x was a power of two |
| 117 | return (x == 0); |
| 118 | } |
| 119 | x >>= 1; |
| 120 | } |
| 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | #ifndef howmany |
| 126 | #define howmany(x, y) (((x)+((y)-1))/(y)) |
| 127 | #endif |
| 128 | |
| 129 | #pragma pack(push, 1) |
| 130 | struct bs { |
| 131 | u_int8_t jmp[3]; /* bootstrap entry point */ |
| 132 | u_int8_t oem[8]; /* OEM name and version */ |
| 133 | }; |
| 134 | #define BS_SIZE 11 |
| 135 | |
| 136 | struct bsbpb { |
| 137 | u_int8_t bps[2]; /* bytes per sector */ |
| 138 | u_int8_t spc; /* sectors per cluster */ |
| 139 | u_int8_t res[2]; /* reserved sectors */ |
| 140 | u_int8_t nft; /* number of FATs */ |
| 141 | u_int8_t rde[2]; /* root directory entries */ |
| 142 | u_int8_t sec[2]; /* total sectors */ |
| 143 | u_int8_t mid; /* media descriptor */ |
| 144 | u_int8_t spf[2]; /* sectors per FAT */ |
| 145 | u_int8_t spt[2]; /* sectors per track */ |
| 146 | u_int8_t hds[2]; /* drive heads */ |
| 147 | u_int8_t hid[4]; /* hidden sectors */ |
| 148 | u_int8_t bsec[4]; /* big total sectors */ |
| 149 | }; |
| 150 | #define BSBPB_SIZE 25 |
| 151 | |
| 152 | struct bsxbpb { |
| 153 | u_int8_t bspf[4]; /* big sectors per FAT */ |
| 154 | u_int8_t xflg[2]; /* FAT control flags */ |
| 155 | u_int8_t vers[2]; /* file system version */ |
| 156 | u_int8_t rdcl[4]; /* root directory start cluster */ |
| 157 | u_int8_t infs[2]; /* file system info sector */ |
| 158 | u_int8_t bkbs[2]; /* backup boot sector */ |
| 159 | u_int8_t rsvd[12]; /* reserved */ |
| 160 | }; |
| 161 | #define BSXBPB_SIZE 28 |
| 162 | |
| 163 | struct bsx { |
| 164 | u_int8_t drv; /* drive number */ |
| 165 | u_int8_t rsvd; /* reserved */ |
| 166 | u_int8_t sig; /* extended boot signature */ |
| 167 | u_int8_t volid[4]; /* volume ID number */ |
| 168 | u_int8_t label[11]; /* volume label */ |
| 169 | u_int8_t type[8]; /* file system type */ |
| 170 | }; |
| 171 | #define BSX_SIZE 26 |
| 172 | |
| 173 | struct de { |
| 174 | u_int8_t namext[11]; /* name and extension */ |
| 175 | u_int8_t attr; /* attributes */ |
| 176 | u_int8_t rsvd[10]; /* reserved */ |
| 177 | u_int8_t time[2]; /* creation time */ |
| 178 | u_int8_t date[2]; /* creation date */ |
| 179 | u_int8_t clus[2]; /* starting cluster */ |
| 180 | u_int8_t size[4]; /* size */ |
| 181 | #define DE_SIZE 32 |
| 182 | }; |
| 183 | #pragma pack(pop) |
| 184 | |
| 185 | struct bpb { |
| 186 | u_int bps; /* bytes per sector */ |
| 187 | u_int spc; /* sectors per cluster */ |
| 188 | u_int res; /* reserved sectors */ |
| 189 | u_int nft; /* number of FATs */ |
| 190 | u_int rde; /* root directory entries */ |
| 191 | u_int sec; /* total sectors */ |
| 192 | u_int mid; /* media descriptor */ |
| 193 | u_int spf; /* sectors per FAT */ |
| 194 | u_int spt; /* sectors per track */ |
| 195 | u_int hds; /* drive heads */ |
| 196 | u_int hid; /* hidden sectors */ |
| 197 | u_int bsec; /* big total sectors */ |
| 198 | u_int bspf; /* big sectors per FAT */ |
| 199 | u_int rdcl; /* root directory start cluster */ |
| 200 | u_int infs; /* file system info sector */ |
| 201 | u_int bkbs; /* backup boot sector */ |
| 202 | }; |
| 203 | |
| 204 | static u_int8_t bootcode[] = { |
| 205 | 0xfa, /* cli */ |
| 206 | 0x31, 0xc0, /* xor ax,ax */ |
| 207 | 0x8e, 0xd0, /* mov ss,ax */ |
| 208 | 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ |
| 209 | 0xfb, /* sti */ |
| 210 | 0x8e, 0xd8, /* mov ds,ax */ |
| 211 | 0xe8, 0x00, 0x00, /* call $ + 3 */ |
| 212 | 0x5e, /* pop si */ |
| 213 | 0x83, 0xc6, 0x19, /* add si,+19h */ |
| 214 | 0xbb, 0x07, 0x00, /* mov bx,0007h */ |
| 215 | 0xfc, /* cld */ |
| 216 | 0xac, /* lodsb */ |
| 217 | 0x84, 0xc0, /* test al,al */ |
| 218 | 0x74, 0x06, /* jz $ + 8 */ |
| 219 | 0xb4, 0x0e, /* mov ah,0eh */ |
| 220 | 0xcd, 0x10, /* int 10h */ |
| 221 | 0xeb, 0xf5, /* jmp $ - 9 */ |
| 222 | 0x30, 0xe4, /* xor ah,ah */ |
| 223 | 0xcd, 0x16, /* int 16h */ |
| 224 | 0xcd, 0x19, /* int 19h */ |
| 225 | 0x0d, 0x0a, |
| 226 | 'N', 'o', 'n', '-', 's', 'y', 's', 't', |
| 227 | 'e', 'm', ' ', 'd', 'i', 's', 'k', |
| 228 | 0x0d, 0x0a, |
| 229 | 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', |
| 230 | 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', |
| 231 | ' ', 'r', 'e', 'b', 'o', 'o', 't', |
| 232 | 0x0d, 0x0a, |
| 233 | 0 |
| 234 | }; |
| 235 | |
| 236 | static void print_bpb(struct bpb *); |
| 237 | static u_int ckgeom(const char *, u_int, const char *); |
| 238 | static u_int argtou(const char *, u_int, u_int, const char *); |
| 239 | static int oklabel(const char *); |
| 240 | static void mklabel(u_int8_t *, const char *); |
| 241 | static void setstr(u_int8_t *, const char *, size_t); |
| 242 | static void usage(char* progname); |
| 243 | |
| 244 | /* |
| 245 | * Construct a FAT12, FAT16, or FAT32 file system. |
| 246 | */ |
| 247 | int |
| 248 | mkdosfs_main(int argc, char *argv[]) |
| 249 | { |
| 250 | static char opts[] = "NB:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:"; |
| 251 | static const char *opt_B, *opt_L, *opt_O; |
| 252 | static u_int opt_F, opt_I, opt_S, opt_a, opt_b, opt_c, opt_e; |
| 253 | static u_int opt_h, opt_i, opt_k, opt_m, opt_n, opt_o, opt_r; |
| 254 | static u_int opt_s, opt_u; |
| 255 | static int opt_N; |
| 256 | static int Iflag, mflag, oflag; |
| 257 | char buf[MAXPATHLEN]; |
| 258 | struct stat sb; |
| 259 | struct timeval tv; |
| 260 | struct bpb bpb; |
| 261 | struct tm *tm; |
| 262 | struct bs *bs; |
| 263 | struct bsbpb *bsbpb; |
| 264 | struct bsxbpb *bsxbpb; |
| 265 | struct bsx *bsx; |
| 266 | struct de *de; |
| 267 | u_int8_t *img; |
| 268 | const char *fname, *dtype, *bname; |
| 269 | ssize_t n; |
| 270 | time_t now; |
| 271 | u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; |
| 272 | int ch, fd, fd1; |
| 273 | char* progname = argv[0]; |
| 274 | |
| 275 | while ((ch = getopt(argc, argv, opts)) != -1) |
| 276 | switch (ch) { |
| 277 | case 'N': |
| 278 | opt_N = 1; |
| 279 | break; |
| 280 | case 'B': |
| 281 | opt_B = optarg; |
| 282 | break; |
| 283 | case 'F': |
| 284 | if (strcmp(optarg, "12") && |
| 285 | strcmp(optarg, "16") && |
| 286 | strcmp(optarg, "32")) |
| 287 | fprintf(stderr, "%s: bad FAT type\n", optarg); |
| 288 | opt_F = atoi(optarg); |
| 289 | break; |
| 290 | case 'I': |
| 291 | opt_I = argto4(optarg, 0, "volume ID"); |
| 292 | Iflag = 1; |
| 293 | break; |
| 294 | case 'L': |
| 295 | if (!oklabel(optarg)) |
| 296 | fprintf(stderr, "%s: bad volume label\n", optarg); |
| 297 | opt_L = optarg; |
| 298 | break; |
| 299 | case 'O': |
| 300 | if (strlen(optarg) > 8) |
| 301 | fprintf(stderr, "%s: bad OEM string\n", optarg); |
| 302 | opt_O = optarg; |
| 303 | break; |
| 304 | case 'S': |
| 305 | opt_S = argto2(optarg, 1, "bytes/sector"); |
| 306 | break; |
| 307 | case 'a': |
| 308 | opt_a = argto4(optarg, 1, "sectors/FAT"); |
| 309 | break; |
| 310 | case 'b': |
| 311 | opt_b = argtox(optarg, 1, "block size"); |
| 312 | opt_c = 0; |
| 313 | break; |
| 314 | case 'c': |
| 315 | opt_c = argto1(optarg, 1, "sectors/cluster"); |
| 316 | opt_b = 0; |
| 317 | break; |
| 318 | case 'e': |
| 319 | opt_e = argto2(optarg, 1, "directory entries"); |
| 320 | break; |
| 321 | case 'h': |
| 322 | opt_h = argto2(optarg, 1, "drive heads"); |
| 323 | break; |
| 324 | case 'i': |
| 325 | opt_i = argto2(optarg, 1, "info sector"); |
| 326 | break; |
| 327 | case 'k': |
| 328 | opt_k = argto2(optarg, 1, "backup sector"); |
| 329 | break; |
| 330 | case 'm': |
| 331 | opt_m = argto1(optarg, 0, "media descriptor"); |
| 332 | mflag = 1; |
| 333 | break; |
| 334 | case 'n': |
| 335 | opt_n = argto1(optarg, 1, "number of FATs"); |
| 336 | break; |
| 337 | case 'o': |
| 338 | opt_o = argto4(optarg, 0, "hidden sectors"); |
| 339 | oflag = 1; |
| 340 | break; |
| 341 | case 'r': |
| 342 | opt_r = argto2(optarg, 1, "reserved sectors"); |
| 343 | break; |
| 344 | case 's': |
| 345 | opt_s = argto4(optarg, 1, "file system size"); |
| 346 | break; |
| 347 | case 'u': |
| 348 | opt_u = argto2(optarg, 1, "sectors/track"); |
| 349 | break; |
| 350 | default: |
| 351 | usage(progname); |
| 352 | } |
| 353 | argc -= optind; |
| 354 | argv += optind; |
| 355 | if (argc < 1 || argc > 2) |
| 356 | usage(progname); |
| 357 | fname = *argv++; |
| 358 | if (!strchr(fname, '/')) { |
| 359 | snprintf(buf, sizeof(buf), "%sr%s", _PATH_DEV, fname); |
| 360 | if (!(fname = strdup(buf))) |
| 361 | fprintf(stderr, NULL); |
| 362 | } |
| 363 | dtype = *argv; |
| 364 | if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1 || |
| 365 | fstat(fd, &sb)) |
| 366 | fprintf(stderr, "%s\n", fname); |
| 367 | memset(&bpb, 0, sizeof(bpb)); |
| 368 | |
| 369 | if (opt_h) |
| 370 | bpb.hds = opt_h; |
| 371 | if (opt_u) |
| 372 | bpb.spt = opt_u; |
| 373 | if (opt_S) |
| 374 | bpb.bps = opt_S; |
| 375 | if (opt_s) |
| 376 | bpb.bsec = opt_s; |
| 377 | if (oflag) |
| 378 | bpb.hid = opt_o; |
| 379 | |
| 380 | bpb.bps = 512; // 512 bytes/sector |
| 381 | bpb.spc = 8; // 4K clusters |
| 382 | |
| 383 | |
| 384 | fprintf(stderr, "opening %s\n", fname); |
| 385 | if ((fd1 = open(fname, O_RDONLY)) == -1) { |
| 386 | fprintf(stderr, "failed to open %s\n", fname); |
| 387 | exit(1); |
| 388 | } |
| 389 | |
The Android Open Source Project | a1e1c1b | 2009-03-03 14:04:41 -0800 | [diff] [blame^] | 390 | lseek(fd1, 0, SEEK_SET); |
| 391 | off_t length = lseek(fd1, 0, SEEK_END); |
| 392 | fprintf(stderr, "lseek returned %ld\n", length); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 393 | if (length > 0) { |
| 394 | bpb.bsec = length / bpb.bps; |
| 395 | bpb.spt = bpb.bsec; |
| 396 | // use FAT32 for 2 gig or greater |
| 397 | if (length >= 2 *1024 *1024 *1024) { |
| 398 | fat = 32; |
| 399 | } else { |
| 400 | fat = 16; |
| 401 | } |
| 402 | } |
| 403 | close(fd1); |
| 404 | fd1 = -1; |
| 405 | |
| 406 | if (!powerof2(bpb.bps)) |
| 407 | fprintf(stderr, "bytes/sector (%u) is not a power of 2\n", bpb.bps); |
| 408 | if (bpb.bps < MINBPS) |
| 409 | fprintf(stderr, "bytes/sector (%u) is too small; minimum is %u\n", |
| 410 | bpb.bps, MINBPS); |
| 411 | |
| 412 | if (!(fat = opt_F)) { |
| 413 | if (!opt_e && (opt_i || opt_k)) |
| 414 | fat = 32; |
| 415 | } |
| 416 | |
| 417 | if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) |
| 418 | fprintf(stderr, "-%c is not a legal FAT%s option\n", |
| 419 | fat == 32 ? 'e' : opt_i ? 'i' : 'k', |
| 420 | fat == 32 ? "32" : "12/16"); |
| 421 | if (fat == 32) |
| 422 | bpb.rde = 0; |
| 423 | if (opt_b) { |
| 424 | if (!powerof2(opt_b)) |
| 425 | fprintf(stderr, "block size (%u) is not a power of 2\n", opt_b); |
| 426 | if (opt_b < bpb.bps) |
| 427 | fprintf(stderr, "block size (%u) is too small; minimum is %u\n", |
| 428 | opt_b, bpb.bps); |
| 429 | if (opt_b > bpb.bps * MAXSPC) |
| 430 | fprintf(stderr, "block size (%u) is too large; maximum is %u\n", |
| 431 | opt_b, bpb.bps * MAXSPC); |
| 432 | bpb.spc = opt_b / bpb.bps; |
| 433 | } |
| 434 | if (opt_c) { |
| 435 | if (!powerof2(opt_c)) |
| 436 | fprintf(stderr, "sectors/cluster (%u) is not a power of 2\n", opt_c); |
| 437 | bpb.spc = opt_c; |
| 438 | } |
| 439 | if (opt_r) |
| 440 | bpb.res = opt_r; |
| 441 | if (opt_n) { |
| 442 | if (opt_n > MAXNFT) |
| 443 | fprintf(stderr, "number of FATs (%u) is too large; maximum is %u\n", |
| 444 | opt_n, MAXNFT); |
| 445 | bpb.nft = opt_n; |
| 446 | } |
| 447 | if (opt_e) |
| 448 | bpb.rde = opt_e; |
| 449 | if (mflag) { |
| 450 | if (opt_m < 0xf0) |
| 451 | fprintf(stderr, "illegal media descriptor (%#x)\n", opt_m); |
| 452 | bpb.mid = opt_m; |
| 453 | } |
| 454 | if (opt_a) |
| 455 | bpb.bspf = opt_a; |
| 456 | if (opt_i) |
| 457 | bpb.infs = opt_i; |
| 458 | if (opt_k) |
| 459 | bpb.bkbs = opt_k; |
| 460 | bss = 1; |
| 461 | bname = NULL; |
| 462 | fd1 = -1; |
| 463 | if (opt_B) { |
| 464 | bname = opt_B; |
| 465 | if (!strchr(bname, '/')) { |
| 466 | snprintf(buf, sizeof(buf), "/boot/%s", bname); |
| 467 | if (!(bname = strdup(buf))) |
| 468 | fprintf(stderr, NULL); |
| 469 | } |
| 470 | if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) |
| 471 | fprintf(stderr, "%s", bname); |
| 472 | if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || |
| 473 | sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) |
| 474 | fprintf(stderr, "%s: inappropriate file type or format\n", bname); |
| 475 | bss = sb.st_size / bpb.bps; |
| 476 | } |
| 477 | if (!bpb.nft) |
| 478 | bpb.nft = 2; |
| 479 | if (!fat) { |
| 480 | if (bpb.bsec < (bpb.res ? bpb.res : bss) + |
| 481 | howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * |
| 482 | ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * |
| 483 | bpb.nft + |
| 484 | howmany(bpb.rde ? bpb.rde : DEFRDE, |
| 485 | bpb.bps / DE_SIZE) + |
| 486 | (bpb.spc ? MINCLS16 : MAXCLS12 + 1) * |
| 487 | (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) |
| 488 | fat = 12; |
| 489 | else if (bpb.rde || bpb.bsec < |
| 490 | (bpb.res ? bpb.res : bss) + |
| 491 | howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + |
| 492 | howmany(DEFRDE, bpb.bps / DE_SIZE) + |
| 493 | (MAXCLS16 + 1) * |
| 494 | (bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) |
| 495 | fat = 16; |
| 496 | else |
| 497 | fat = 32; |
| 498 | } |
| 499 | x = bss; |
| 500 | if (fat == 32) { |
| 501 | if (!bpb.infs) { |
| 502 | if (x == MAXU16 || x == bpb.bkbs) |
| 503 | fprintf(stderr, "no room for info sector\n"); |
| 504 | bpb.infs = x; |
| 505 | } |
| 506 | if (bpb.infs != MAXU16 && x <= bpb.infs) |
| 507 | x = bpb.infs + 1; |
| 508 | if (!bpb.bkbs) { |
| 509 | if (x == MAXU16) |
| 510 | fprintf(stderr, "no room for backup sector\n"); |
| 511 | bpb.bkbs = x; |
| 512 | } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) |
| 513 | fprintf(stderr, "backup sector would overwrite info sector\n"); |
| 514 | if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) |
| 515 | x = bpb.bkbs + 1; |
| 516 | } |
| 517 | if (!bpb.res) |
| 518 | bpb.res = fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x; |
| 519 | else if (bpb.res < x) |
| 520 | fprintf(stderr, "too few reserved sectors (need %d have %d)\n", x, bpb.res); |
| 521 | if (fat != 32 && !bpb.rde) |
| 522 | bpb.rde = DEFRDE; |
| 523 | rds = howmany(bpb.rde, bpb.bps / DE_SIZE); |
| 524 | if (!bpb.spc) |
| 525 | for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps); |
| 526 | bpb.spc < MAXSPC && |
| 527 | bpb.res + |
| 528 | howmany((RESFTE + maxcls(fat)) * (fat / BPN), |
| 529 | bpb.bps * NPB) * bpb.nft + |
| 530 | rds + |
| 531 | (u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec; |
| 532 | bpb.spc <<= 1); |
| 533 | if (fat != 32 && bpb.bspf > MAXU16) |
| 534 | fprintf(stderr, "too many sectors/FAT for FAT12/16\n"); |
| 535 | x1 = bpb.res + rds; |
| 536 | x = bpb.bspf ? bpb.bspf : 1; |
| 537 | if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) |
| 538 | fprintf(stderr, "meta data exceeds file system size\n"); |
| 539 | x1 += x * bpb.nft; |
| 540 | x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / |
| 541 | (bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft); |
| 542 | x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), |
| 543 | bpb.bps * NPB); |
| 544 | if (!bpb.bspf) { |
| 545 | bpb.bspf = x2; |
| 546 | x1 += (bpb.bspf - 1) * bpb.nft; |
| 547 | } |
| 548 | cls = (bpb.bsec - x1) / bpb.spc; |
| 549 | x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE; |
| 550 | if (cls > x) |
| 551 | cls = x; |
| 552 | if (bpb.bspf < x2) |
| 553 | fprintf(stderr, "warning: sectors/FAT limits file system to %u clusters\n", |
| 554 | cls); |
| 555 | if (cls < mincls(fat)) |
| 556 | fprintf(stderr, "%u clusters too few clusters for FAT%u, need %u\n", cls, fat, |
| 557 | mincls(fat)); |
| 558 | if (cls > maxcls(fat)) { |
| 559 | cls = maxcls(fat); |
| 560 | bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; |
| 561 | fprintf(stderr, "warning: FAT type limits file system to %u sectors\n", |
| 562 | bpb.bsec); |
| 563 | } |
| 564 | printf("%s: %u sector%s in %u FAT%u cluster%s " |
| 565 | "(%u bytes/cluster)\n", fname, cls * bpb.spc, |
| 566 | cls * bpb.spc == 1 ? "" : "s", cls, fat, |
| 567 | cls == 1 ? "" : "s", bpb.bps * bpb.spc); |
| 568 | if (!bpb.mid) |
| 569 | bpb.mid = !bpb.hid ? 0xf0 : 0xf8; |
| 570 | if (fat == 32) |
| 571 | bpb.rdcl = RESFTE; |
| 572 | if (bpb.hid + bpb.bsec <= MAXU16) { |
| 573 | bpb.sec = bpb.bsec; |
| 574 | bpb.bsec = 0; |
| 575 | } |
| 576 | if (fat != 32) { |
| 577 | bpb.spf = bpb.bspf; |
| 578 | bpb.bspf = 0; |
| 579 | } |
| 580 | ch = 0; |
| 581 | if (fat == 12) |
| 582 | ch = 1; /* 001 Primary DOS with 12 bit FAT */ |
| 583 | else if (fat == 16) { |
| 584 | if (bpb.bsec == 0) |
| 585 | ch = 4; /* 004 Primary DOS with 16 bit FAT <32M */ |
| 586 | else |
| 587 | ch = 6; /* 006 Primary 'big' DOS, 16-bit FAT (> 32MB) */ |
| 588 | /* |
| 589 | * XXX: what about: |
| 590 | * 014 DOS (16-bit FAT) - LBA |
| 591 | * ? |
| 592 | */ |
| 593 | } else if (fat == 32) { |
| 594 | ch = 11; /* 011 Primary DOS with 32 bit FAT */ |
| 595 | /* |
| 596 | * XXX: what about: |
| 597 | * 012 Primary DOS with 32 bit FAT - LBA |
| 598 | * ? |
| 599 | */ |
| 600 | } |
| 601 | if (ch != 0) |
| 602 | printf("MBR type: %d\n", ch); |
| 603 | print_bpb(&bpb); |
| 604 | if (!opt_N) { |
| 605 | gettimeofday(&tv, NULL); |
| 606 | now = tv.tv_sec; |
| 607 | tm = localtime(&now); |
| 608 | if (!(img = malloc(bpb.bps))) |
| 609 | fprintf(stderr, NULL); |
| 610 | dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; |
| 611 | |
| 612 | for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { |
| 613 | x = lsn; |
| 614 | if (opt_B && |
| 615 | fat == 32 && bpb.bkbs != MAXU16 && |
| 616 | bss <= bpb.bkbs && x >= bpb.bkbs) { |
| 617 | x -= bpb.bkbs; |
The Android Open Source Project | a1e1c1b | 2009-03-03 14:04:41 -0800 | [diff] [blame^] | 618 | if (!x && lseek(fd1, 0, SEEK_SET)) |
| 619 | fprintf(stderr, "lseek failed for %s\n", bname); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 620 | } |
| 621 | if (opt_B && x < bss) { |
| 622 | if ((n = read(fd1, img, bpb.bps)) == -1) |
| 623 | fprintf(stderr, "%s\n", bname); |
| 624 | if (n != bpb.bps) |
| 625 | fprintf(stderr, "%s: can't read sector %u\n", bname, x); |
| 626 | } else |
| 627 | memset(img, 0, bpb.bps); |
| 628 | if (!lsn || |
| 629 | (fat == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { |
| 630 | x1 = BS_SIZE; |
| 631 | bsbpb = (struct bsbpb *)(img + x1); |
| 632 | mk2(bsbpb->bps, bpb.bps); |
| 633 | mk1(bsbpb->spc, bpb.spc); |
| 634 | mk2(bsbpb->res, bpb.res); |
| 635 | mk1(bsbpb->nft, bpb.nft); |
| 636 | mk2(bsbpb->rde, bpb.rde); |
| 637 | mk2(bsbpb->sec, bpb.sec); |
| 638 | mk1(bsbpb->mid, bpb.mid); |
| 639 | mk2(bsbpb->spf, bpb.spf); |
| 640 | mk2(bsbpb->spt, bpb.spt); |
| 641 | mk2(bsbpb->hds, bpb.hds); |
| 642 | mk4(bsbpb->hid, bpb.hid); |
| 643 | mk4(bsbpb->bsec, bpb.bsec); |
| 644 | x1 += BSBPB_SIZE; |
| 645 | if (fat == 32) { |
| 646 | bsxbpb = (struct bsxbpb *)(img + x1); |
| 647 | mk4(bsxbpb->bspf, bpb.bspf); |
| 648 | mk2(bsxbpb->xflg, 0); |
| 649 | mk2(bsxbpb->vers, 0); |
| 650 | mk4(bsxbpb->rdcl, bpb.rdcl); |
| 651 | mk2(bsxbpb->infs, bpb.infs); |
| 652 | mk2(bsxbpb->bkbs, bpb.bkbs); |
| 653 | x1 += BSXBPB_SIZE; |
| 654 | } |
| 655 | bsx = (struct bsx *)(img + x1); |
| 656 | mk1(bsx->sig, 0x29); |
| 657 | if (Iflag) |
| 658 | x = opt_I; |
| 659 | else |
| 660 | x = (((u_int)(1 + tm->tm_mon) << 8 | |
| 661 | (u_int)tm->tm_mday) + |
| 662 | ((u_int)tm->tm_sec << 8 | |
| 663 | (u_int)(tv.tv_usec / 10))) << 16 | |
| 664 | ((u_int)(1900 + tm->tm_year) + |
| 665 | ((u_int)tm->tm_hour << 8 | |
| 666 | (u_int)tm->tm_min)); |
| 667 | mk4(bsx->volid, x); |
| 668 | mklabel(bsx->label, opt_L ? opt_L : "NO_NAME"); |
| 669 | snprintf(buf, sizeof(buf), "FAT%u", fat); |
| 670 | setstr(bsx->type, buf, sizeof(bsx->type)); |
| 671 | if (!opt_B) { |
| 672 | x1 += BSX_SIZE; |
| 673 | bs = (struct bs *)img; |
| 674 | mk1(bs->jmp[0], 0xeb); |
| 675 | mk1(bs->jmp[1], x1 - 2); |
| 676 | mk1(bs->jmp[2], 0x90); |
| 677 | setstr(bs->oem, opt_O ? opt_O : "NetBSD", |
| 678 | sizeof(bs->oem)); |
| 679 | memcpy(img + x1, bootcode, sizeof(bootcode)); |
| 680 | mk2(img + bpb.bps - 2, DOSMAGIC); |
| 681 | } |
| 682 | } else if (fat == 32 && bpb.infs != MAXU16 && |
| 683 | (lsn == bpb.infs || |
| 684 | (bpb.bkbs != MAXU16 && |
| 685 | lsn == bpb.bkbs + bpb.infs))) { |
| 686 | mk4(img, 0x41615252); |
| 687 | mk4(img + bpb.bps - 28, 0x61417272); |
| 688 | mk4(img + bpb.bps - 24, 0xffffffff); |
| 689 | mk4(img + bpb.bps - 20, bpb.rdcl); |
| 690 | mk2(img + bpb.bps - 2, DOSMAGIC); |
| 691 | } else if (lsn >= bpb.res && lsn < dir && |
| 692 | !((lsn - bpb.res) % |
| 693 | (bpb.spf ? bpb.spf : bpb.bspf))) { |
| 694 | mk1(img[0], bpb.mid); |
| 695 | for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) |
| 696 | mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); |
| 697 | } else if (lsn == dir && opt_L) { |
| 698 | de = (struct de *)img; |
| 699 | mklabel(de->namext, opt_L); |
| 700 | mk1(de->attr, 050); |
| 701 | x = (u_int)tm->tm_hour << 11 | |
| 702 | (u_int)tm->tm_min << 5 | |
| 703 | (u_int)tm->tm_sec >> 1; |
| 704 | mk2(de->time, x); |
| 705 | x = (u_int)(tm->tm_year - 80) << 9 | |
| 706 | (u_int)(tm->tm_mon + 1) << 5 | |
| 707 | (u_int)tm->tm_mday; |
| 708 | mk2(de->date, x); |
| 709 | } |
| 710 | if ((n = write(fd, img, bpb.bps)) == -1) |
| 711 | fprintf(stderr, "%s\n", fname); |
| 712 | if (n != bpb.bps) |
| 713 | fprintf(stderr, "%s: can't write sector %u\n", fname, lsn); |
| 714 | } |
| 715 | } |
| 716 | return 0; |
| 717 | } |
| 718 | |
| 719 | /* |
| 720 | * Print out BPB values. |
| 721 | */ |
| 722 | static void |
| 723 | print_bpb(struct bpb *bpb) |
| 724 | { |
| 725 | printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, |
| 726 | bpb->nft); |
| 727 | if (bpb->rde) |
| 728 | printf(" rde=%u", bpb->rde); |
| 729 | if (bpb->sec) |
| 730 | printf(" sec=%u", bpb->sec); |
| 731 | printf(" mid=%#x", bpb->mid); |
| 732 | if (bpb->spf) |
| 733 | printf(" spf=%u", bpb->spf); |
| 734 | printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); |
| 735 | if (bpb->bsec) |
| 736 | printf(" bsec=%u", bpb->bsec); |
| 737 | if (!bpb->spf) { |
| 738 | printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); |
| 739 | printf(" infs="); |
| 740 | printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); |
| 741 | printf(" bkbs="); |
| 742 | printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); |
| 743 | } |
| 744 | printf("\n"); |
| 745 | } |
| 746 | |
| 747 | /* |
| 748 | * Check a disk geometry value. |
| 749 | */ |
| 750 | static u_int |
| 751 | ckgeom(const char *fname, u_int val, const char *msg) |
| 752 | { |
| 753 | if (!val) |
| 754 | fprintf(stderr, "%s: no default %s\n", fname, msg); |
| 755 | if (val > MAXU16) |
| 756 | fprintf(stderr, "%s: illegal %s\n", fname, msg); |
| 757 | return val; |
| 758 | } |
| 759 | |
| 760 | /* |
| 761 | * Convert and check a numeric option argument. |
| 762 | */ |
| 763 | static u_int |
| 764 | argtou(const char *arg, u_int lo, u_int hi, const char *msg) |
| 765 | { |
| 766 | char *s; |
| 767 | u_long x; |
| 768 | |
| 769 | errno = 0; |
| 770 | x = strtoul(arg, &s, 0); |
| 771 | if (errno || !*arg || *s || x < lo || x > hi) |
| 772 | fprintf(stderr, "%s: bad %s\n", arg, msg); |
| 773 | return x; |
| 774 | } |
| 775 | |
| 776 | /* |
| 777 | * Check a volume label. |
| 778 | */ |
| 779 | static int |
| 780 | oklabel(const char *src) |
| 781 | { |
| 782 | int c, i; |
| 783 | |
| 784 | for (i = 0; i <= 11; i++) { |
| 785 | c = (u_char)*src++; |
| 786 | if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) |
| 787 | break; |
| 788 | } |
| 789 | return i && !c; |
| 790 | } |
| 791 | |
| 792 | /* |
| 793 | * Make a volume label. |
| 794 | */ |
| 795 | static void |
| 796 | mklabel(u_int8_t *dest, const char *src) |
| 797 | { |
| 798 | int c, i; |
| 799 | |
| 800 | for (i = 0; i < 11; i++) { |
| 801 | c = *src ? toupper((unsigned char)*src++) : ' '; |
| 802 | *dest++ = !i && c == '\xe5' ? 5 : c; |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | /* |
| 807 | * Copy string, padding with spaces. |
| 808 | */ |
| 809 | static void |
| 810 | setstr(u_int8_t *dest, const char *src, size_t len) |
| 811 | { |
| 812 | while (len--) |
| 813 | *dest++ = *src ? *src++ : ' '; |
| 814 | } |
| 815 | |
| 816 | /* |
| 817 | * Print usage message. |
| 818 | */ |
| 819 | static void |
| 820 | usage(char* progname) |
| 821 | { |
| 822 | fprintf(stderr, |
| 823 | "usage: %s [ -options ] special [disktype]\n", progname); |
| 824 | fprintf(stderr, "where the options are:\n"); |
| 825 | fprintf(stderr, "\t-N don't create file system: " |
| 826 | "just print out parameters\n"); |
| 827 | fprintf(stderr, "\t-B get bootstrap from file\n"); |
| 828 | fprintf(stderr, "\t-F FAT type (12, 16, or 32)\n"); |
| 829 | fprintf(stderr, "\t-I volume ID\n"); |
| 830 | fprintf(stderr, "\t-L volume label\n"); |
| 831 | fprintf(stderr, "\t-O OEM string\n"); |
| 832 | fprintf(stderr, "\t-S bytes/sector\n"); |
| 833 | fprintf(stderr, "\t-a sectors/FAT\n"); |
| 834 | fprintf(stderr, "\t-b block size\n"); |
| 835 | fprintf(stderr, "\t-c sectors/cluster\n"); |
| 836 | fprintf(stderr, "\t-e root directory entries\n"); |
| 837 | fprintf(stderr, "\t-h drive heads\n"); |
| 838 | fprintf(stderr, "\t-i file system info sector\n"); |
| 839 | fprintf(stderr, "\t-k backup boot sector\n"); |
| 840 | fprintf(stderr, "\t-m media descriptor\n"); |
| 841 | fprintf(stderr, "\t-n number of FATs\n"); |
| 842 | fprintf(stderr, "\t-o hidden sectors\n"); |
| 843 | fprintf(stderr, "\t-r reserved sectors\n"); |
| 844 | fprintf(stderr, "\t-s file system size (sectors)\n"); |
| 845 | fprintf(stderr, "\t-u sectors/track\n"); |
| 846 | exit(1); |
| 847 | } |
| 848 | |
| 849 | |