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Lines 55-60
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| 55 |
#define NPB 2 /* nibbles per byte */ |
55 |
#define NPB 2 /* nibbles per byte */ |
| 56 |
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56 |
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| 57 |
#define DOSMAGIC 0xaa55 /* DOS magic number */ |
57 |
#define DOSMAGIC 0xaa55 /* DOS magic number */ |
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58 |
#define MAXBPS 4096 /* maximum bytes per sector */ |
| 58 |
#define MINBPS 512 /* minimum bytes per sector */ |
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#define MINBPS 512 /* minimum bytes per sector */ |
| 59 |
#define MAXSPC 128 /* maximum sectors per cluster */ |
60 |
#define MAXSPC 128 /* maximum sectors per cluster */ |
| 60 |
#define MAXNFT 16 /* maximum number of FATs */ |
61 |
#define MAXNFT 16 /* maximum number of FATs */ |
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Lines 406-429
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| 406 |
(int)delta, bpb.bpbSecPerTrack); |
407 |
(int)delta, bpb.bpbSecPerTrack); |
| 407 |
bpb.bpbHugeSectors -= delta; |
408 |
bpb.bpbHugeSectors -= delta; |
| 408 |
} |
409 |
} |
| 409 |
if (bpb.bpbSecPerClust == 0) { /* set defaults */ |
410 |
else |
| 410 |
if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */ |
411 |
bpb.bpbSecPerClust /= (bpb.bpbBytesPerSec / MINBPS); |
| 411 |
bpb.bpbSecPerClust = 1; |
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} |
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else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */ |
413 |
if (bpb.bpbSecPerClust == 0) { /* set defaults */ |
| 413 |
bpb.bpbSecPerClust = 8; |
414 |
if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */ |
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else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */ |
415 |
bpb.bpbSecPerClust = 1; |
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bpb.bpbSecPerClust = 16; |
416 |
else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */ |
| 416 |
else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */ |
417 |
bpb.bpbSecPerClust = 8; |
| 417 |
bpb.bpbSecPerClust = 32; |
418 |
else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */ |
| 418 |
else |
419 |
bpb.bpbSecPerClust = 16; |
| 419 |
bpb.bpbSecPerClust = 64; /* otherwise 32k */ |
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else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */ |
| 420 |
} |
421 |
bpb.bpbSecPerClust = 32; |
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422 |
else |
| 423 |
bpb.bpbSecPerClust = 64; /* otherwise 32k */ |
| 421 |
} |
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} |
| 422 |
if (!powerof2(bpb.bpbBytesPerSec)) |
425 |
if (!powerof2(bpb.bpbBytesPerSec)) |
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errx(1, "bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec); |
426 |
errx(1, "bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec); |
| 424 |
if (bpb.bpbBytesPerSec < MINBPS) |
427 |
if (bpb.bpbBytesPerSec < MINBPS) |
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errx(1, "bytes/sector (%u) is too small; minimum is %u", |
428 |
errx(1, "bytes/sector (%u) is too small; minimum is %u", |
| 426 |
bpb.bpbBytesPerSec, MINBPS); |
429 |
bpb.bpbBytesPerSec, MINBPS); |
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430 |
if (bpb.bpbBytesPerSec > MAXBPS) |
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printf( "WARNING: bytes/sector (%u) is bigger than %u", |
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bpb.bpbBytesPerSec, MAXBPS); |
| 427 |
if (!(fat = opt_F)) { |
433 |
if (!(fat = opt_F)) { |
| 428 |
if (opt_f) |
434 |
if (opt_f) |
| 429 |
fat = 12; |
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fat = 12; |
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Lines 447-452
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| 447 |
opt_b, bpb.bpbBytesPerSec * MAXSPC); |
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opt_b, bpb.bpbBytesPerSec * MAXSPC); |
| 448 |
bpb.bpbSecPerClust = opt_b / bpb.bpbBytesPerSec; |
454 |
bpb.bpbSecPerClust = opt_b / bpb.bpbBytesPerSec; |
| 449 |
} |
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} |
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456 |
if (bpb.bpbSecPerClust * bpb.bpbBytesPerSec > 32 * 1024) |
| 457 |
printf("WARNING: bytes per sector (%u) is greater than 32K", |
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bpb.bpbSecPerClust * bpb.bpbBytesPerSec); |
| 450 |
if (opt_c) { |
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if (opt_c) { |
| 451 |
if (!powerof2(opt_c)) |
460 |
if (!powerof2(opt_c)) |
| 452 |
errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); |
461 |
errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); |