San Mehat | 72eead4 | 2009-07-06 11:10:03 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1998 Robert Nordier |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS |
| 16 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY |
| 19 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| 21 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| 23 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 25 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #ifndef lint |
| 29 | static const char rcsid[] = |
| 30 | "$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.33 2009/04/11 14:56:29 ed Exp $"; |
| 31 | #endif /* not lint */ |
| 32 | |
| 33 | #include <sys/param.h> |
| 34 | |
| 35 | #ifndef ANDROID |
| 36 | #include <sys/fdcio.h> |
| 37 | #include <sys/disk.h> |
| 38 | #include <sys/disklabel.h> |
| 39 | #include <sys/mount.h> |
| 40 | #else |
| 41 | #include <stdarg.h> |
| 42 | #include <linux/fs.h> |
| 43 | #include <linux/hdreg.h> |
| 44 | #endif |
| 45 | |
| 46 | #include <sys/stat.h> |
| 47 | #include <sys/time.h> |
| 48 | |
| 49 | #include <ctype.h> |
| 50 | #include <err.h> |
| 51 | #include <errno.h> |
| 52 | #include <fcntl.h> |
| 53 | #include <inttypes.h> |
| 54 | #include <paths.h> |
| 55 | #include <stdio.h> |
| 56 | #include <stdlib.h> |
| 57 | #include <string.h> |
| 58 | #include <time.h> |
| 59 | #include <unistd.h> |
| 60 | |
| 61 | #define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ |
| 62 | #define BPN 4 /* bits per nibble */ |
| 63 | #define NPB 2 /* nibbles per byte */ |
| 64 | |
| 65 | #define DOSMAGIC 0xaa55 /* DOS magic number */ |
| 66 | #define MINBPS 512 /* minimum bytes per sector */ |
| 67 | #define MAXSPC 128 /* maximum sectors per cluster */ |
| 68 | #define MAXNFT 16 /* maximum number of FATs */ |
| 69 | #define DEFBLK 4096 /* default block size */ |
| 70 | #define DEFBLK16 2048 /* default block size FAT16 */ |
| 71 | #define DEFRDE 512 /* default root directory entries */ |
| 72 | #define RESFTE 2 /* reserved FAT entries */ |
| 73 | #define MINCLS12 1 /* minimum FAT12 clusters */ |
| 74 | #define MINCLS16 0x1000 /* minimum FAT16 clusters */ |
| 75 | #define MINCLS32 2 /* minimum FAT32 clusters */ |
| 76 | #define MAXCLS12 0xfed /* maximum FAT12 clusters */ |
| 77 | #define MAXCLS16 0xfff5 /* maximum FAT16 clusters */ |
| 78 | #define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */ |
| 79 | |
| 80 | #define mincls(fat) ((fat) == 12 ? MINCLS12 : \ |
| 81 | (fat) == 16 ? MINCLS16 : \ |
| 82 | MINCLS32) |
| 83 | |
| 84 | #define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ |
| 85 | (fat) == 16 ? MAXCLS16 : \ |
| 86 | MAXCLS32) |
| 87 | |
| 88 | #define mk1(p, x) \ |
| 89 | (p) = (u_int8_t)(x) |
| 90 | |
| 91 | #define mk2(p, x) \ |
| 92 | (p)[0] = (u_int8_t)(x), \ |
| 93 | (p)[1] = (u_int8_t)((x) >> 010) |
| 94 | |
| 95 | #define mk4(p, x) \ |
| 96 | (p)[0] = (u_int8_t)(x), \ |
| 97 | (p)[1] = (u_int8_t)((x) >> 010), \ |
| 98 | (p)[2] = (u_int8_t)((x) >> 020), \ |
| 99 | (p)[3] = (u_int8_t)((x) >> 030) |
| 100 | |
| 101 | #define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) |
| 102 | #define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) |
| 103 | #define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) |
| 104 | #define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) |
| 105 | |
| 106 | struct bs { |
| 107 | u_int8_t jmp[3]; /* bootstrap entry point */ |
| 108 | u_int8_t oem[8]; /* OEM name and version */ |
| 109 | }; |
| 110 | |
| 111 | struct bsbpb { |
| 112 | u_int8_t bps[2]; /* bytes per sector */ |
| 113 | u_int8_t spc; /* sectors per cluster */ |
| 114 | u_int8_t res[2]; /* reserved sectors */ |
| 115 | u_int8_t nft; /* number of FATs */ |
| 116 | u_int8_t rde[2]; /* root directory entries */ |
| 117 | u_int8_t sec[2]; /* total sectors */ |
| 118 | u_int8_t mid; /* media descriptor */ |
| 119 | u_int8_t spf[2]; /* sectors per FAT */ |
| 120 | u_int8_t spt[2]; /* sectors per track */ |
| 121 | u_int8_t hds[2]; /* drive heads */ |
| 122 | u_int8_t hid[4]; /* hidden sectors */ |
| 123 | u_int8_t bsec[4]; /* big total sectors */ |
| 124 | }; |
| 125 | |
| 126 | struct bsxbpb { |
| 127 | u_int8_t bspf[4]; /* big sectors per FAT */ |
| 128 | u_int8_t xflg[2]; /* FAT control flags */ |
| 129 | u_int8_t vers[2]; /* file system version */ |
| 130 | u_int8_t rdcl[4]; /* root directory start cluster */ |
| 131 | u_int8_t infs[2]; /* file system info sector */ |
| 132 | u_int8_t bkbs[2]; /* backup boot sector */ |
| 133 | u_int8_t rsvd[12]; /* reserved */ |
| 134 | }; |
| 135 | |
| 136 | struct bsx { |
| 137 | u_int8_t drv; /* drive number */ |
| 138 | u_int8_t rsvd; /* reserved */ |
| 139 | u_int8_t sig; /* extended boot signature */ |
| 140 | u_int8_t volid[4]; /* volume ID number */ |
| 141 | u_int8_t label[11]; /* volume label */ |
| 142 | u_int8_t type[8]; /* file system type */ |
| 143 | }; |
| 144 | |
| 145 | struct de { |
| 146 | u_int8_t namext[11]; /* name and extension */ |
| 147 | u_int8_t attr; /* attributes */ |
| 148 | u_int8_t rsvd[10]; /* reserved */ |
| 149 | u_int8_t time[2]; /* creation time */ |
| 150 | u_int8_t date[2]; /* creation date */ |
| 151 | u_int8_t clus[2]; /* starting cluster */ |
| 152 | u_int8_t size[4]; /* size */ |
| 153 | }; |
| 154 | |
| 155 | struct bpb { |
| 156 | u_int bps; /* bytes per sector */ |
| 157 | u_int spc; /* sectors per cluster */ |
| 158 | u_int res; /* reserved sectors */ |
| 159 | u_int nft; /* number of FATs */ |
| 160 | u_int rde; /* root directory entries */ |
| 161 | u_int sec; /* total sectors */ |
| 162 | u_int mid; /* media descriptor */ |
| 163 | u_int spf; /* sectors per FAT */ |
| 164 | u_int spt; /* sectors per track */ |
| 165 | u_int hds; /* drive heads */ |
| 166 | u_int hid; /* hidden sectors */ |
| 167 | u_int bsec; /* big total sectors */ |
| 168 | u_int bspf; /* big sectors per FAT */ |
| 169 | u_int rdcl; /* root directory start cluster */ |
| 170 | u_int infs; /* file system info sector */ |
| 171 | u_int bkbs; /* backup boot sector */ |
| 172 | }; |
| 173 | |
| 174 | #define BPBGAP 0, 0, 0, 0, 0, 0 |
| 175 | |
| 176 | static struct { |
| 177 | const char *name; |
| 178 | struct bpb bpb; |
| 179 | } const stdfmt[] = { |
| 180 | {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}}, |
| 181 | {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}}, |
| 182 | {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}}, |
| 183 | {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}}, |
| 184 | {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}}, |
| 185 | {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}}, |
| 186 | {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}}, |
| 187 | {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}}, |
| 188 | {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}}, |
| 189 | {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}} |
| 190 | }; |
| 191 | |
| 192 | static const u_int8_t bootcode[] = { |
| 193 | 0xfa, /* cli */ |
| 194 | 0x31, 0xc0, /* xor ax,ax */ |
| 195 | 0x8e, 0xd0, /* mov ss,ax */ |
| 196 | 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ |
| 197 | 0xfb, /* sti */ |
| 198 | 0x8e, 0xd8, /* mov ds,ax */ |
| 199 | 0xe8, 0x00, 0x00, /* call $ + 3 */ |
| 200 | 0x5e, /* pop si */ |
| 201 | 0x83, 0xc6, 0x19, /* add si,+19h */ |
| 202 | 0xbb, 0x07, 0x00, /* mov bx,0007h */ |
| 203 | 0xfc, /* cld */ |
| 204 | 0xac, /* lodsb */ |
| 205 | 0x84, 0xc0, /* test al,al */ |
| 206 | 0x74, 0x06, /* jz $ + 8 */ |
| 207 | 0xb4, 0x0e, /* mov ah,0eh */ |
| 208 | 0xcd, 0x10, /* int 10h */ |
| 209 | 0xeb, 0xf5, /* jmp $ - 9 */ |
| 210 | 0x30, 0xe4, /* xor ah,ah */ |
| 211 | 0xcd, 0x16, /* int 16h */ |
| 212 | 0xcd, 0x19, /* int 19h */ |
| 213 | 0x0d, 0x0a, |
| 214 | 'N', 'o', 'n', '-', 's', 'y', 's', 't', |
| 215 | 'e', 'm', ' ', 'd', 'i', 's', 'k', |
| 216 | 0x0d, 0x0a, |
| 217 | 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', |
| 218 | 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', |
| 219 | ' ', 'r', 'e', 'b', 'o', 'o', 't', |
| 220 | 0x0d, 0x0a, |
| 221 | 0 |
| 222 | }; |
| 223 | |
| 224 | static void check_mounted(const char *, mode_t); |
| 225 | static void getstdfmt(const char *, struct bpb *); |
| 226 | static void getdiskinfo(int, const char *, const char *, int, |
| 227 | struct bpb *); |
| 228 | static void print_bpb(struct bpb *); |
| 229 | static u_int ckgeom(const char *, u_int, const char *); |
| 230 | static u_int argtou(const char *, u_int, u_int, const char *); |
| 231 | static off_t argtooff(const char *, const char *); |
| 232 | static int oklabel(const char *); |
| 233 | static void mklabel(u_int8_t *, const char *); |
| 234 | static void setstr(u_int8_t *, const char *, size_t); |
| 235 | static void usage(void); |
| 236 | |
| 237 | #ifdef ANDROID |
| 238 | static void err(int val, const char *fmt, ...) { |
| 239 | va_list ap; |
| 240 | va_start(ap, fmt); |
| 241 | char *fmt2; |
| 242 | asprintf(&fmt2, "%s\n", fmt); |
| 243 | vfprintf(stderr, fmt2, ap); |
| 244 | free(fmt2); |
| 245 | va_end(ap); |
| 246 | } |
| 247 | |
| 248 | static void errx(int val, const char *fmt, ...) { |
| 249 | va_list ap; |
| 250 | va_start(ap, fmt); |
| 251 | char *fmt2; |
| 252 | asprintf(&fmt2, "%s\n", fmt); |
| 253 | vfprintf(stderr, fmt2, ap); |
| 254 | free(fmt2); |
| 255 | va_end(ap); |
| 256 | } |
| 257 | |
| 258 | static void warnx(const char *fmt, ...) { |
| 259 | va_list ap; |
| 260 | va_start(ap, fmt); |
| 261 | char *fmt2; |
| 262 | asprintf(&fmt2, "%s\n", fmt); |
| 263 | vfprintf(stderr, fmt2, ap); |
| 264 | free(fmt2); |
| 265 | va_end(ap); |
| 266 | } |
| 267 | #define powerof2(x) ((((x) - 1) & (x)) == 0) |
| 268 | #define howmany(x, y) (((x) + ((y) - 1)) / (y)) |
| 269 | #define MAX(x,y) ((x) > (y) ? (x) : (y)) |
| 270 | #define MIN(a, b) ((a) < (b) ? (a) : (b)) |
| 271 | |
| 272 | #endif |
| 273 | /* |
| 274 | * Construct a FAT12, FAT16, or FAT32 file system. |
| 275 | */ |
| 276 | int |
| 277 | newfs_msdos_main(int argc, char *argv[]) |
| 278 | { |
| 279 | static const char opts[] = "@:NB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:"; |
| 280 | const char *opt_B = NULL, *opt_L = NULL, *opt_O = NULL, *opt_f = NULL; |
| 281 | u_int opt_F = 0, opt_I = 0, opt_S = 0, opt_a = 0, opt_b = 0, opt_c = 0; |
| 282 | u_int opt_e = 0, opt_h = 0, opt_i = 0, opt_k = 0, opt_m = 0, opt_n = 0; |
| 283 | u_int opt_o = 0, opt_r = 0, opt_s = 0, opt_u = 0; |
| 284 | int opt_N = 0; |
| 285 | int Iflag = 0, mflag = 0, oflag = 0; |
| 286 | char buf[MAXPATHLEN]; |
| 287 | struct stat sb; |
| 288 | struct timeval tv; |
| 289 | struct bpb bpb; |
| 290 | struct tm *tm; |
| 291 | struct bs *bs; |
| 292 | struct bsbpb *bsbpb; |
| 293 | struct bsxbpb *bsxbpb; |
| 294 | struct bsx *bsx; |
| 295 | struct de *de; |
| 296 | u_int8_t *img; |
| 297 | const char *fname, *dtype, *bname; |
| 298 | ssize_t n; |
| 299 | time_t now; |
| 300 | u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; |
| 301 | int ch, fd, fd1; |
| 302 | off_t opt_create = 0, opt_ofs = 0; |
| 303 | |
| 304 | while ((ch = getopt(argc, argv, opts)) != -1) |
| 305 | switch (ch) { |
| 306 | case '@': |
| 307 | opt_ofs = argtooff(optarg, "offset"); |
| 308 | break; |
| 309 | case 'N': |
| 310 | opt_N = 1; |
| 311 | break; |
| 312 | case 'B': |
| 313 | opt_B = optarg; |
| 314 | break; |
| 315 | case 'C': |
| 316 | opt_create = argtooff(optarg, "create size"); |
| 317 | break; |
| 318 | case 'F': |
| 319 | if (strcmp(optarg, "12") && |
| 320 | strcmp(optarg, "16") && |
| 321 | strcmp(optarg, "32")) |
| 322 | errx(1, "%s: bad FAT type", optarg); |
| 323 | opt_F = atoi(optarg); |
| 324 | break; |
| 325 | case 'I': |
| 326 | opt_I = argto4(optarg, 0, "volume ID"); |
| 327 | Iflag = 1; |
| 328 | break; |
| 329 | case 'L': |
| 330 | if (!oklabel(optarg)) |
| 331 | errx(1, "%s: bad volume label", optarg); |
| 332 | opt_L = optarg; |
| 333 | break; |
| 334 | case 'O': |
| 335 | if (strlen(optarg) > 8) |
| 336 | errx(1, "%s: bad OEM string", optarg); |
| 337 | opt_O = optarg; |
| 338 | break; |
| 339 | case 'S': |
| 340 | opt_S = argto2(optarg, 1, "bytes/sector"); |
| 341 | break; |
| 342 | case 'a': |
| 343 | opt_a = argto4(optarg, 1, "sectors/FAT"); |
| 344 | break; |
| 345 | case 'b': |
| 346 | opt_b = argtox(optarg, 1, "block size"); |
| 347 | opt_c = 0; |
| 348 | break; |
| 349 | case 'c': |
| 350 | opt_c = argto1(optarg, 1, "sectors/cluster"); |
| 351 | opt_b = 0; |
| 352 | break; |
| 353 | case 'e': |
| 354 | opt_e = argto2(optarg, 1, "directory entries"); |
| 355 | break; |
| 356 | case 'f': |
| 357 | opt_f = optarg; |
| 358 | break; |
| 359 | case 'h': |
| 360 | opt_h = argto2(optarg, 1, "drive heads"); |
| 361 | break; |
| 362 | case 'i': |
| 363 | opt_i = argto2(optarg, 1, "info sector"); |
| 364 | break; |
| 365 | case 'k': |
| 366 | opt_k = argto2(optarg, 1, "backup sector"); |
| 367 | break; |
| 368 | case 'm': |
| 369 | opt_m = argto1(optarg, 0, "media descriptor"); |
| 370 | mflag = 1; |
| 371 | break; |
| 372 | case 'n': |
| 373 | opt_n = argto1(optarg, 1, "number of FATs"); |
| 374 | break; |
| 375 | case 'o': |
| 376 | opt_o = argto4(optarg, 0, "hidden sectors"); |
| 377 | oflag = 1; |
| 378 | break; |
| 379 | case 'r': |
| 380 | opt_r = argto2(optarg, 1, "reserved sectors"); |
| 381 | break; |
| 382 | case 's': |
| 383 | opt_s = argto4(optarg, 1, "file system size"); |
| 384 | break; |
| 385 | case 'u': |
| 386 | opt_u = argto2(optarg, 1, "sectors/track"); |
| 387 | break; |
| 388 | default: |
| 389 | usage(); |
| 390 | } |
| 391 | argc -= optind; |
| 392 | argv += optind; |
| 393 | if (argc < 1 || argc > 2) |
| 394 | usage(); |
| 395 | fname = *argv++; |
| 396 | if (!opt_create && !strchr(fname, '/')) { |
| 397 | snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname); |
| 398 | if (!(fname = strdup(buf))) |
| 399 | err(1, NULL); |
| 400 | } |
| 401 | dtype = *argv; |
| 402 | if (opt_create) { |
| 403 | if (opt_N) |
| 404 | errx(1, "create (-C) is incompatible with -N"); |
| 405 | fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); |
| 406 | if (fd == -1) |
| 407 | errx(1, "failed to create %s", fname); |
| 408 | if (ftruncate(fd, opt_create)) |
| 409 | errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create); |
| 410 | } else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1) |
| 411 | err(1, "%s", fname); |
| 412 | if (fstat(fd, &sb)) |
| 413 | err(1, "%s", fname); |
| 414 | if (opt_create) { |
| 415 | if (!S_ISREG(sb.st_mode)) |
| 416 | warnx("warning, %s is not a regular file", fname); |
| 417 | } else { |
| 418 | if (!S_ISCHR(sb.st_mode)) |
| 419 | warnx("warning, %s is not a character device", fname); |
| 420 | } |
| 421 | if (!opt_N) |
| 422 | check_mounted(fname, sb.st_mode); |
| 423 | if (opt_ofs && opt_ofs != lseek(fd, opt_ofs, SEEK_SET)) |
| 424 | errx(1, "cannot seek to %jd", (intmax_t)opt_ofs); |
| 425 | memset(&bpb, 0, sizeof(bpb)); |
| 426 | if (opt_f) { |
| 427 | getstdfmt(opt_f, &bpb); |
| 428 | bpb.bsec = bpb.sec; |
| 429 | bpb.sec = 0; |
| 430 | bpb.bspf = bpb.spf; |
| 431 | bpb.spf = 0; |
| 432 | } |
| 433 | if (opt_h) |
| 434 | bpb.hds = opt_h; |
| 435 | if (opt_u) |
| 436 | bpb.spt = opt_u; |
| 437 | if (opt_S) |
| 438 | bpb.bps = opt_S; |
| 439 | if (opt_s) |
| 440 | bpb.bsec = opt_s; |
| 441 | if (oflag) |
| 442 | bpb.hid = opt_o; |
| 443 | if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) { |
| 444 | off_t delta; |
| 445 | getdiskinfo(fd, fname, dtype, oflag, &bpb); |
| 446 | bpb.bsec -= (opt_ofs / bpb.bps); |
| 447 | delta = bpb.bsec % bpb.spt; |
| 448 | if (delta != 0) { |
| 449 | warnx("trim %d sectors to adjust to a multiple of %d", |
| 450 | (int)delta, bpb.spt); |
| 451 | bpb.bsec -= delta; |
| 452 | } |
| 453 | if (bpb.spc == 0) { /* set defaults */ |
| 454 | if (bpb.bsec <= 6000) /* about 3MB -> 512 bytes */ |
| 455 | bpb.spc = 1; |
| 456 | else if (bpb.bsec <= (1<<17)) /* 64M -> 4k */ |
| 457 | bpb.spc = 8; |
| 458 | else if (bpb.bsec <= (1<<19)) /* 256M -> 8k */ |
| 459 | bpb.spc = 16; |
| 460 | else if (bpb.bsec <= (1<<21)) /* 1G -> 16k */ |
| 461 | bpb.spc = 32; |
| 462 | else |
| 463 | bpb.spc = 64; /* otherwise 32k */ |
| 464 | } |
| 465 | } |
| 466 | if (!powerof2(bpb.bps)) |
| 467 | errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps); |
| 468 | if (bpb.bps < MINBPS) |
| 469 | errx(1, "bytes/sector (%u) is too small; minimum is %u", |
| 470 | bpb.bps, MINBPS); |
| 471 | if (!(fat = opt_F)) { |
| 472 | if (opt_f) |
| 473 | fat = 12; |
| 474 | else if (!opt_e && (opt_i || opt_k)) |
| 475 | fat = 32; |
| 476 | } |
| 477 | if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) |
| 478 | errx(1, "-%c is not a legal FAT%s option", |
| 479 | fat == 32 ? 'e' : opt_i ? 'i' : 'k', |
| 480 | fat == 32 ? "32" : "12/16"); |
| 481 | if (opt_f && fat == 32) |
| 482 | bpb.rde = 0; |
| 483 | if (opt_b) { |
| 484 | if (!powerof2(opt_b)) |
| 485 | errx(1, "block size (%u) is not a power of 2", opt_b); |
| 486 | if (opt_b < bpb.bps) |
| 487 | errx(1, "block size (%u) is too small; minimum is %u", |
| 488 | opt_b, bpb.bps); |
| 489 | if (opt_b > bpb.bps * MAXSPC) |
| 490 | errx(1, "block size (%u) is too large; maximum is %u", |
| 491 | opt_b, bpb.bps * MAXSPC); |
| 492 | bpb.spc = opt_b / bpb.bps; |
| 493 | } |
| 494 | if (opt_c) { |
| 495 | if (!powerof2(opt_c)) |
| 496 | errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); |
| 497 | bpb.spc = opt_c; |
| 498 | } |
| 499 | if (opt_r) |
| 500 | bpb.res = opt_r; |
| 501 | if (opt_n) { |
| 502 | if (opt_n > MAXNFT) |
| 503 | errx(1, "number of FATs (%u) is too large; maximum is %u", |
| 504 | opt_n, MAXNFT); |
| 505 | bpb.nft = opt_n; |
| 506 | } |
| 507 | if (opt_e) |
| 508 | bpb.rde = opt_e; |
| 509 | if (mflag) { |
| 510 | if (opt_m < 0xf0) |
| 511 | errx(1, "illegal media descriptor (%#x)", opt_m); |
| 512 | bpb.mid = opt_m; |
| 513 | } |
| 514 | if (opt_a) |
| 515 | bpb.bspf = opt_a; |
| 516 | if (opt_i) |
| 517 | bpb.infs = opt_i; |
| 518 | if (opt_k) |
| 519 | bpb.bkbs = opt_k; |
| 520 | bss = 1; |
| 521 | bname = NULL; |
| 522 | fd1 = -1; |
| 523 | if (opt_B) { |
| 524 | bname = opt_B; |
| 525 | if (!strchr(bname, '/')) { |
| 526 | snprintf(buf, sizeof(buf), "/boot/%s", bname); |
| 527 | if (!(bname = strdup(buf))) |
| 528 | err(1, NULL); |
| 529 | } |
| 530 | if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) |
| 531 | err(1, "%s", bname); |
| 532 | if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || |
| 533 | sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) |
| 534 | errx(1, "%s: inappropriate file type or format", bname); |
| 535 | bss = sb.st_size / bpb.bps; |
| 536 | } |
| 537 | if (!bpb.nft) |
| 538 | bpb.nft = 2; |
| 539 | if (!fat) { |
| 540 | if (bpb.bsec < (bpb.res ? bpb.res : bss) + |
| 541 | howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * |
| 542 | ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * |
| 543 | bpb.nft + |
| 544 | howmany(bpb.rde ? bpb.rde : DEFRDE, |
| 545 | bpb.bps / sizeof(struct de)) + |
| 546 | (bpb.spc ? MINCLS16 : MAXCLS12 + 1) * |
| 547 | (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) |
| 548 | fat = 12; |
| 549 | else if (bpb.rde || bpb.bsec < |
| 550 | (bpb.res ? bpb.res : bss) + |
| 551 | howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + |
| 552 | howmany(DEFRDE, bpb.bps / sizeof(struct de)) + |
| 553 | (MAXCLS16 + 1) * |
| 554 | (bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) |
| 555 | fat = 16; |
| 556 | else |
| 557 | fat = 32; |
| 558 | } |
| 559 | x = bss; |
| 560 | if (fat == 32) { |
| 561 | if (!bpb.infs) { |
| 562 | if (x == MAXU16 || x == bpb.bkbs) |
| 563 | errx(1, "no room for info sector"); |
| 564 | bpb.infs = x; |
| 565 | } |
| 566 | if (bpb.infs != MAXU16 && x <= bpb.infs) |
| 567 | x = bpb.infs + 1; |
| 568 | if (!bpb.bkbs) { |
| 569 | if (x == MAXU16) |
| 570 | errx(1, "no room for backup sector"); |
| 571 | bpb.bkbs = x; |
| 572 | } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) |
| 573 | errx(1, "backup sector would overwrite info sector"); |
| 574 | if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) |
| 575 | x = bpb.bkbs + 1; |
| 576 | } |
| 577 | if (!bpb.res) |
| 578 | bpb.res = fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x; |
| 579 | else if (bpb.res < x) |
| 580 | errx(1, "too few reserved sectors"); |
| 581 | if (fat != 32 && !bpb.rde) |
| 582 | bpb.rde = DEFRDE; |
| 583 | rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); |
| 584 | if (!bpb.spc) |
| 585 | for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps); |
| 586 | bpb.spc < MAXSPC && |
| 587 | bpb.res + |
| 588 | howmany((RESFTE + maxcls(fat)) * (fat / BPN), |
| 589 | bpb.bps * NPB) * bpb.nft + |
| 590 | rds + |
| 591 | (u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec; |
| 592 | bpb.spc <<= 1); |
| 593 | if (fat != 32 && bpb.bspf > MAXU16) |
| 594 | errx(1, "too many sectors/FAT for FAT12/16"); |
| 595 | x1 = bpb.res + rds; |
| 596 | x = bpb.bspf ? bpb.bspf : 1; |
| 597 | if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) |
| 598 | errx(1, "meta data exceeds file system size"); |
| 599 | x1 += x * bpb.nft; |
| 600 | x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / |
| 601 | (bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft); |
| 602 | x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), |
| 603 | bpb.bps * NPB); |
| 604 | if (!bpb.bspf) { |
| 605 | bpb.bspf = x2; |
| 606 | x1 += (bpb.bspf - 1) * bpb.nft; |
| 607 | } |
| 608 | cls = (bpb.bsec - x1) / bpb.spc; |
| 609 | x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE; |
| 610 | if (cls > x) |
| 611 | cls = x; |
| 612 | if (bpb.bspf < x2) |
| 613 | warnx("warning: sectors/FAT limits file system to %u clusters", |
| 614 | cls); |
| 615 | if (cls < mincls(fat)) |
| 616 | errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, |
| 617 | mincls(fat)); |
| 618 | if (cls > maxcls(fat)) { |
| 619 | cls = maxcls(fat); |
| 620 | bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; |
| 621 | warnx("warning: FAT type limits file system to %u sectors", |
| 622 | bpb.bsec); |
| 623 | } |
| 624 | printf("%s: %u sector%s in %u FAT%u cluster%s " |
| 625 | "(%u bytes/cluster)\n", fname, cls * bpb.spc, |
| 626 | cls * bpb.spc == 1 ? "" : "s", cls, fat, |
| 627 | cls == 1 ? "" : "s", bpb.bps * bpb.spc); |
| 628 | if (!bpb.mid) |
| 629 | bpb.mid = !bpb.hid ? 0xf0 : 0xf8; |
| 630 | if (fat == 32) |
| 631 | bpb.rdcl = RESFTE; |
| 632 | if (bpb.hid + bpb.bsec <= MAXU16) { |
| 633 | bpb.sec = bpb.bsec; |
| 634 | bpb.bsec = 0; |
| 635 | } |
| 636 | if (fat != 32) { |
| 637 | bpb.spf = bpb.bspf; |
| 638 | bpb.bspf = 0; |
| 639 | } |
| 640 | print_bpb(&bpb); |
| 641 | if (!opt_N) { |
| 642 | gettimeofday(&tv, NULL); |
| 643 | now = tv.tv_sec; |
| 644 | tm = localtime(&now); |
| 645 | if (!(img = malloc(bpb.bps))) |
| 646 | err(1, NULL); |
| 647 | dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; |
| 648 | for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { |
| 649 | x = lsn; |
| 650 | if (opt_B && |
| 651 | fat == 32 && bpb.bkbs != MAXU16 && |
| 652 | bss <= bpb.bkbs && x >= bpb.bkbs) { |
| 653 | x -= bpb.bkbs; |
| 654 | if (!x && lseek(fd1, opt_ofs, SEEK_SET)) |
| 655 | err(1, "%s", bname); |
| 656 | } |
| 657 | if (opt_B && x < bss) { |
| 658 | if ((n = read(fd1, img, bpb.bps)) == -1) |
| 659 | err(1, "%s", bname); |
| 660 | if ((unsigned)n != bpb.bps) |
| 661 | errx(1, "%s: can't read sector %u", bname, x); |
| 662 | } else |
| 663 | memset(img, 0, bpb.bps); |
| 664 | if (!lsn || |
| 665 | (fat == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { |
| 666 | x1 = sizeof(struct bs); |
| 667 | bsbpb = (struct bsbpb *)(img + x1); |
| 668 | mk2(bsbpb->bps, bpb.bps); |
| 669 | mk1(bsbpb->spc, bpb.spc); |
| 670 | mk2(bsbpb->res, bpb.res); |
| 671 | mk1(bsbpb->nft, bpb.nft); |
| 672 | mk2(bsbpb->rde, bpb.rde); |
| 673 | mk2(bsbpb->sec, bpb.sec); |
| 674 | mk1(bsbpb->mid, bpb.mid); |
| 675 | mk2(bsbpb->spf, bpb.spf); |
| 676 | mk2(bsbpb->spt, bpb.spt); |
| 677 | mk2(bsbpb->hds, bpb.hds); |
| 678 | mk4(bsbpb->hid, bpb.hid); |
| 679 | mk4(bsbpb->bsec, bpb.bsec); |
| 680 | x1 += sizeof(struct bsbpb); |
| 681 | if (fat == 32) { |
| 682 | bsxbpb = (struct bsxbpb *)(img + x1); |
| 683 | mk4(bsxbpb->bspf, bpb.bspf); |
| 684 | mk2(bsxbpb->xflg, 0); |
| 685 | mk2(bsxbpb->vers, 0); |
| 686 | mk4(bsxbpb->rdcl, bpb.rdcl); |
| 687 | mk2(bsxbpb->infs, bpb.infs); |
| 688 | mk2(bsxbpb->bkbs, bpb.bkbs); |
| 689 | x1 += sizeof(struct bsxbpb); |
| 690 | } |
| 691 | bsx = (struct bsx *)(img + x1); |
| 692 | mk1(bsx->sig, 0x29); |
| 693 | if (Iflag) |
| 694 | x = opt_I; |
| 695 | else |
| 696 | x = (((u_int)(1 + tm->tm_mon) << 8 | |
| 697 | (u_int)tm->tm_mday) + |
| 698 | ((u_int)tm->tm_sec << 8 | |
| 699 | (u_int)(tv.tv_usec / 10))) << 16 | |
| 700 | ((u_int)(1900 + tm->tm_year) + |
| 701 | ((u_int)tm->tm_hour << 8 | |
| 702 | (u_int)tm->tm_min)); |
| 703 | mk4(bsx->volid, x); |
| 704 | mklabel(bsx->label, opt_L ? opt_L : "NO NAME"); |
| 705 | sprintf(buf, "FAT%u", fat); |
| 706 | setstr(bsx->type, buf, sizeof(bsx->type)); |
| 707 | if (!opt_B) { |
| 708 | x1 += sizeof(struct bsx); |
| 709 | bs = (struct bs *)img; |
| 710 | mk1(bs->jmp[0], 0xeb); |
| 711 | mk1(bs->jmp[1], x1 - 2); |
| 712 | mk1(bs->jmp[2], 0x90); |
| 713 | setstr(bs->oem, opt_O ? opt_O : "BSD 4.4", |
| 714 | sizeof(bs->oem)); |
| 715 | memcpy(img + x1, bootcode, sizeof(bootcode)); |
| 716 | mk2(img + MINBPS - 2, DOSMAGIC); |
| 717 | } |
| 718 | } else if (fat == 32 && bpb.infs != MAXU16 && |
| 719 | (lsn == bpb.infs || |
| 720 | (bpb.bkbs != MAXU16 && |
| 721 | lsn == bpb.bkbs + bpb.infs))) { |
| 722 | mk4(img, 0x41615252); |
| 723 | mk4(img + MINBPS - 28, 0x61417272); |
| 724 | mk4(img + MINBPS - 24, 0xffffffff); |
| 725 | mk4(img + MINBPS - 20, bpb.rdcl); |
| 726 | mk2(img + MINBPS - 2, DOSMAGIC); |
| 727 | } else if (lsn >= bpb.res && lsn < dir && |
| 728 | !((lsn - bpb.res) % |
| 729 | (bpb.spf ? bpb.spf : bpb.bspf))) { |
| 730 | mk1(img[0], bpb.mid); |
| 731 | for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) |
| 732 | mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); |
| 733 | } else if (lsn == dir && opt_L) { |
| 734 | de = (struct de *)img; |
| 735 | mklabel(de->namext, opt_L); |
| 736 | mk1(de->attr, 050); |
| 737 | x = (u_int)tm->tm_hour << 11 | |
| 738 | (u_int)tm->tm_min << 5 | |
| 739 | (u_int)tm->tm_sec >> 1; |
| 740 | mk2(de->time, x); |
| 741 | x = (u_int)(tm->tm_year - 80) << 9 | |
| 742 | (u_int)(tm->tm_mon + 1) << 5 | |
| 743 | (u_int)tm->tm_mday; |
| 744 | mk2(de->date, x); |
| 745 | } |
| 746 | if ((n = write(fd, img, bpb.bps)) == -1) |
| 747 | err(1, "%s", fname); |
| 748 | if ((unsigned)n != bpb.bps) |
| 749 | errx(1, "%s: can't write sector %u", fname, lsn); |
| 750 | } |
| 751 | } |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | /* |
| 756 | * Exit with error if file system is mounted. |
| 757 | */ |
| 758 | static void |
| 759 | check_mounted(const char *fname, mode_t mode) |
| 760 | { |
| 761 | struct statfs *mp; |
| 762 | const char *s1, *s2; |
| 763 | size_t len; |
| 764 | int n, r; |
| 765 | |
| 766 | #ifdef ANDROID |
| 767 | warnx("Skipping mount checks"); |
| 768 | #else |
| 769 | if (!(n = getmntinfo(&mp, MNT_NOWAIT))) |
| 770 | err(1, "getmntinfo"); |
| 771 | len = strlen(_PATH_DEV); |
| 772 | s1 = fname; |
| 773 | if (!strncmp(s1, _PATH_DEV, len)) |
| 774 | s1 += len; |
| 775 | r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; |
| 776 | for (; n--; mp++) { |
| 777 | s2 = mp->f_mntfromname; |
| 778 | if (!strncmp(s2, _PATH_DEV, len)) |
| 779 | s2 += len; |
| 780 | if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || |
| 781 | !strcmp(s1, s2)) |
| 782 | errx(1, "%s is mounted on %s", fname, mp->f_mntonname); |
| 783 | } |
| 784 | #endif |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | * Get a standard format. |
| 789 | */ |
| 790 | static void |
| 791 | getstdfmt(const char *fmt, struct bpb *bpb) |
| 792 | { |
| 793 | u_int x, i; |
| 794 | |
| 795 | x = sizeof(stdfmt) / sizeof(stdfmt[0]); |
| 796 | for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); |
| 797 | if (i == x) |
| 798 | errx(1, "%s: unknown standard format", fmt); |
| 799 | *bpb = stdfmt[i].bpb; |
| 800 | } |
| 801 | |
| 802 | /* |
| 803 | * Get disk slice, partition, and geometry information. |
| 804 | */ |
| 805 | |
| 806 | #ifdef ANDROID |
| 807 | static void |
| 808 | getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag, |
| 809 | struct bpb *bpb) |
| 810 | { |
| 811 | struct hd_geometry geom; |
| 812 | |
| 813 | if (ioctl(fd, BLKSSZGET, &bpb->bps)) { |
| 814 | fprintf(stderr, "Error getting bytes / sector (%s)", strerror(errno)); |
| 815 | exit(1); |
| 816 | } |
| 817 | |
| 818 | ckgeom(fname, bpb->bps, "bytes/sector"); |
| 819 | |
| 820 | if (ioctl(fd, BLKGETSIZE, &bpb->bsec)) { |
| 821 | fprintf(stderr, "Error getting blocksize (%s)", strerror(errno)); |
| 822 | exit(1); |
| 823 | } |
| 824 | |
| 825 | if (ioctl(fd, HDIO_GETGEO, &geom)) { |
| 826 | fprintf(stderr, "Error getting gemoetry (%s)", strerror(errno)); |
| 827 | exit(1); |
| 828 | } |
| 829 | |
| 830 | bpb->spt = geom.sectors; |
| 831 | ckgeom(fname, bpb->spt, "sectors/track"); |
| 832 | |
| 833 | bpb->hds = geom.heads; |
| 834 | ckgeom(fname, bpb->hds, "drive heads"); |
| 835 | } |
| 836 | |
| 837 | #else |
| 838 | |
| 839 | static void |
| 840 | getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag, |
| 841 | struct bpb *bpb) |
| 842 | { |
| 843 | struct disklabel *lp, dlp; |
| 844 | struct fd_type type; |
| 845 | off_t ms, hs = 0; |
| 846 | |
| 847 | lp = NULL; |
| 848 | |
| 849 | /* If the user specified a disk type, try to use that */ |
| 850 | if (dtype != NULL) { |
| 851 | lp = getdiskbyname(dtype); |
| 852 | } |
| 853 | |
| 854 | /* Maybe it's a floppy drive */ |
| 855 | if (lp == NULL) { |
| 856 | if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) { |
| 857 | struct stat st; |
| 858 | |
| 859 | if (fstat(fd, &st)) |
| 860 | err(1, "Cannot get disk size"); |
| 861 | /* create a fake geometry for a file image */ |
| 862 | ms = st.st_size; |
| 863 | dlp.d_secsize = 512; |
| 864 | dlp.d_nsectors = 63; |
| 865 | dlp.d_ntracks = 255; |
| 866 | dlp.d_secperunit = ms / dlp.d_secsize; |
| 867 | lp = &dlp; |
| 868 | } else if (ioctl(fd, FD_GTYPE, &type) != -1) { |
| 869 | dlp.d_secsize = 128 << type.secsize; |
| 870 | dlp.d_nsectors = type.sectrac; |
| 871 | dlp.d_ntracks = type.heads; |
| 872 | dlp.d_secperunit = ms / dlp.d_secsize; |
| 873 | lp = &dlp; |
| 874 | } |
| 875 | } |
| 876 | |
| 877 | /* Maybe it's a fixed drive */ |
| 878 | if (lp == NULL) { |
| 879 | if (ioctl(fd, DIOCGDINFO, &dlp) == -1) { |
| 880 | if (bpb->bps == 0 && ioctl(fd, DIOCGSECTORSIZE, &dlp.d_secsize) == -1) |
| 881 | errx(1, "Cannot get sector size, %s", strerror(errno)); |
| 882 | |
| 883 | /* XXX Should we use bpb->bps if it's set? */ |
| 884 | dlp.d_secperunit = ms / dlp.d_secsize; |
| 885 | |
| 886 | if (bpb->spt == 0 && ioctl(fd, DIOCGFWSECTORS, &dlp.d_nsectors) == -1) { |
| 887 | warnx("Cannot get number of sectors per track, %s", strerror(errno)); |
| 888 | dlp.d_nsectors = 63; |
| 889 | } |
| 890 | if (bpb->hds == 0 && ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) { |
| 891 | warnx("Cannot get number of heads, %s", strerror(errno)); |
| 892 | if (dlp.d_secperunit <= 63*1*1024) |
| 893 | dlp.d_ntracks = 1; |
| 894 | else if (dlp.d_secperunit <= 63*16*1024) |
| 895 | dlp.d_ntracks = 16; |
| 896 | else |
| 897 | dlp.d_ntracks = 255; |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | hs = (ms / dlp.d_secsize) - dlp.d_secperunit; |
| 902 | lp = &dlp; |
| 903 | } |
| 904 | |
| 905 | if (bpb->bps == 0) |
| 906 | bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector"); |
| 907 | if (bpb->spt == 0) |
| 908 | bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track"); |
| 909 | if (bpb->hds == 0) |
| 910 | bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads"); |
| 911 | if (bpb->bsec == 0) |
| 912 | bpb->bsec = lp->d_secperunit; |
| 913 | if (bpb->hid == 0) |
| 914 | bpb->hid = hs; |
| 915 | } |
| 916 | #endif |
| 917 | |
| 918 | /* |
| 919 | * Print out BPB values. |
| 920 | */ |
| 921 | static void |
| 922 | print_bpb(struct bpb *bpb) |
| 923 | { |
| 924 | printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, |
| 925 | bpb->nft); |
| 926 | if (bpb->rde) |
| 927 | printf(" rde=%u", bpb->rde); |
| 928 | if (bpb->sec) |
| 929 | printf(" sec=%u", bpb->sec); |
| 930 | printf(" mid=%#x", bpb->mid); |
| 931 | if (bpb->spf) |
| 932 | printf(" spf=%u", bpb->spf); |
| 933 | printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); |
| 934 | if (bpb->bsec) |
| 935 | printf(" bsec=%u", bpb->bsec); |
| 936 | if (!bpb->spf) { |
| 937 | printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); |
| 938 | printf(" infs="); |
| 939 | printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); |
| 940 | printf(" bkbs="); |
| 941 | printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); |
| 942 | } |
| 943 | printf("\n"); |
| 944 | } |
| 945 | |
| 946 | /* |
| 947 | * Check a disk geometry value. |
| 948 | */ |
| 949 | static u_int |
| 950 | ckgeom(const char *fname, u_int val, const char *msg) |
| 951 | { |
| 952 | if (!val) |
| 953 | errx(1, "%s: no default %s", fname, msg); |
| 954 | if (val > MAXU16) |
| 955 | errx(1, "%s: illegal %s %d", fname, msg, val); |
| 956 | return val; |
| 957 | } |
| 958 | |
| 959 | /* |
| 960 | * Convert and check a numeric option argument. |
| 961 | */ |
| 962 | static u_int |
| 963 | argtou(const char *arg, u_int lo, u_int hi, const char *msg) |
| 964 | { |
| 965 | char *s; |
| 966 | u_long x; |
| 967 | |
| 968 | errno = 0; |
| 969 | x = strtoul(arg, &s, 0); |
| 970 | if (errno || !*arg || *s || x < lo || x > hi) |
| 971 | errx(1, "%s: bad %s", arg, msg); |
| 972 | return x; |
| 973 | } |
| 974 | |
| 975 | /* |
| 976 | * Same for off_t, with optional skmgpP suffix |
| 977 | */ |
| 978 | static off_t |
| 979 | argtooff(const char *arg, const char *msg) |
| 980 | { |
| 981 | char *s; |
| 982 | off_t x; |
| 983 | |
| 984 | x = strtoll(arg, &s, 0); |
| 985 | /* allow at most one extra char */ |
| 986 | if (errno || x < 0 || (s[0] && s[1]) ) |
| 987 | errx(1, "%s: bad %s", arg, msg); |
| 988 | if (*s) { /* the extra char is the multiplier */ |
| 989 | switch (*s) { |
| 990 | default: |
| 991 | errx(1, "%s: bad %s", arg, msg); |
| 992 | /* notreached */ |
| 993 | |
| 994 | case 's': /* sector */ |
| 995 | case 'S': |
| 996 | x <<= 9; /* times 512 */ |
| 997 | break; |
| 998 | |
| 999 | case 'k': /* kilobyte */ |
| 1000 | case 'K': |
| 1001 | x <<= 10; /* times 1024 */ |
| 1002 | break; |
| 1003 | |
| 1004 | case 'm': /* megabyte */ |
| 1005 | case 'M': |
| 1006 | x <<= 20; /* times 1024*1024 */ |
| 1007 | break; |
| 1008 | |
| 1009 | case 'g': /* gigabyte */ |
| 1010 | case 'G': |
| 1011 | x <<= 30; /* times 1024*1024*1024 */ |
| 1012 | break; |
| 1013 | |
| 1014 | case 'p': /* partition start */ |
| 1015 | case 'P': /* partition start */ |
| 1016 | case 'l': /* partition length */ |
| 1017 | case 'L': /* partition length */ |
| 1018 | errx(1, "%s: not supported yet %s", arg, msg); |
| 1019 | /* notreached */ |
| 1020 | } |
| 1021 | } |
| 1022 | return x; |
| 1023 | } |
| 1024 | |
| 1025 | /* |
| 1026 | * Check a volume label. |
| 1027 | */ |
| 1028 | static int |
| 1029 | oklabel(const char *src) |
| 1030 | { |
| 1031 | int c, i; |
| 1032 | |
| 1033 | for (i = 0; i <= 11; i++) { |
| 1034 | c = (u_char)*src++; |
| 1035 | if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) |
| 1036 | break; |
| 1037 | } |
| 1038 | return i && !c; |
| 1039 | } |
| 1040 | |
| 1041 | /* |
| 1042 | * Make a volume label. |
| 1043 | */ |
| 1044 | static void |
| 1045 | mklabel(u_int8_t *dest, const char *src) |
| 1046 | { |
| 1047 | int c, i; |
| 1048 | |
| 1049 | for (i = 0; i < 11; i++) { |
| 1050 | c = *src ? toupper(*src++) : ' '; |
| 1051 | *dest++ = !i && c == '\xe5' ? 5 : c; |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | /* |
| 1056 | * Copy string, padding with spaces. |
| 1057 | */ |
| 1058 | static void |
| 1059 | setstr(u_int8_t *dest, const char *src, size_t len) |
| 1060 | { |
| 1061 | while (len--) |
| 1062 | *dest++ = *src ? *src++ : ' '; |
| 1063 | } |
| 1064 | |
| 1065 | /* |
| 1066 | * Print usage message. |
| 1067 | */ |
| 1068 | static void |
| 1069 | usage(void) |
| 1070 | { |
| 1071 | fprintf(stderr, |
| 1072 | "usage: newfs_msdos [ -options ] special [disktype]\n" |
| 1073 | "where the options are:\n" |
| 1074 | "\t-@ create file system at specified offset\n" |
| 1075 | "\t-B get bootstrap from file\n" |
| 1076 | "\t-C create image file with specified size\n" |
| 1077 | "\t-F FAT type (12, 16, or 32)\n" |
| 1078 | "\t-I volume ID\n" |
| 1079 | "\t-L volume label\n" |
| 1080 | "\t-N don't create file system: just print out parameters\n" |
| 1081 | "\t-O OEM string\n" |
| 1082 | "\t-S bytes/sector\n" |
| 1083 | "\t-a sectors/FAT\n" |
| 1084 | "\t-b block size\n" |
| 1085 | "\t-c sectors/cluster\n" |
| 1086 | "\t-e root directory entries\n" |
| 1087 | "\t-f standard format\n" |
| 1088 | "\t-h drive heads\n" |
| 1089 | "\t-i file system info sector\n" |
| 1090 | "\t-k backup boot sector\n" |
| 1091 | "\t-m media descriptor\n" |
| 1092 | "\t-n number of FATs\n" |
| 1093 | "\t-o hidden sectors\n" |
| 1094 | "\t-r reserved sectors\n" |
| 1095 | "\t-s file system size (sectors)\n" |
| 1096 | "\t-u sectors/track\n"); |
| 1097 | exit(1); |
| 1098 | } |