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add a new command, cmp, and fix a bug in fat_mount.

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okuji committed 2000-02-20 05:27:14 +00:00
1 parent 07996ed613
commit b0574dee64
4 files changed
+112 -7
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stage2/fsys_fat.c
+12 -7
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@@ -67,22 +67,27 @@ fat_mount (void)
return 0;
/* Read bpb */
if (!devread (0, 0, sizeof(bpb), (char *) &bpb))
if (! devread (0, 0, sizeof (bpb), (char *) &bpb))
return 0;
/* Check if the number of sectors per cluster is zero here, to avoid
zero division. */
if (bpb.sects_per_clust == 0)
return 0;
for (i = 0; (1 << i) < FAT_CVT_U16(bpb.bytes_per_sect); i++)
{}
for (i = 0; (1 << i) < FAT_CVT_U16 (bpb.bytes_per_sect); i++)
;
FAT_SUPER->sectsize_bits = i;
for (i = 0; (1 << i) < bpb.sects_per_clust; i++)
{}
;
FAT_SUPER->clustsize_bits = FAT_SUPER->sectsize_bits + i;
/* Fill in info about super block */
FAT_SUPER->num_sectors = FAT_CVT_U16(bpb.short_sectors)
? FAT_CVT_U16(bpb.short_sectors) : bpb.long_sectors;
FAT_SUPER->num_sectors = FAT_CVT_U16 (bpb.short_sectors)
? FAT_CVT_U16 (bpb.short_sectors) : bpb.long_sectors;
/* FAT offset and length */
FAT_SUPER->fat_offset = FAT_CVT_U16(bpb.reserved_sects);
FAT_SUPER->fat_offset = FAT_CVT_U16 (bpb.reserved_sects);
FAT_SUPER->fat_length =
bpb.fat_length ? bpb.fat_length : bpb.fat32_length;