diff options
| -rw-r--r-- | sbin/fsck_msdosfs/fat.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sbin/fsck_msdosfs/fat.c b/sbin/fsck_msdosfs/fat.c index d04661a..55f9bbb 100644 --- a/sbin/fsck_msdosfs/fat.c +++ b/sbin/fsck_msdosfs/fat.c @@ -52,6 +52,24 @@ static int clustdiffer(cl_t, cl_t *, cl_t *, int); static int tryclear(struct bootblock *, struct fatEntry *, cl_t, cl_t *); static int _readfat(int, struct bootblock *, int, u_char **); +/*- + * The first 2 FAT entries contain pseudo-cluster numbers with the following + * layout: + * + * 31...... ........ ........ .......0 + * rrrr1111 11111111 11111111 mmmmmmmm FAT32 entry 0 + * rrrrsh11 11111111 11111111 11111xxx FAT32 entry 1 + * + * 11111111 mmmmmmmm FAT16 entry 0 + * sh111111 11111xxx FAT16 entry 1 + * + * r = reserved + * m = BPB media ID byte + * s = clean flag (1 = dismounted; 0 = still mounted) + * h = hard error flag (1 = ok; 0 = I/O error) + * x = any value ok + */ + int checkdirty(int fs, struct bootblock *boot) { |
