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Following sections explain internals of metastore file (.metadata).


### Data types

    CSTRING     = NUL-terminated binary string
    BSTRING(N)  = binary string of length N
    INT(N)      = N byte integer in little-endian byte order


### File layout

    HEADER
    N * ENTRY


### HEADER format

    BSTRING(10) - Magic header - "MeTaSt00r3"
    BSTRING(8)  - Version - "\0\0\0\0\0\0\0\0" (currently)


### ENTRY format

    CSTRING     - Path  (absolute or relative)
    CSTRING     - Owner (owner name, not uid)
    CSTRING     - Group (group name, not gid)

    INT(8)      - Mtime (seconds)
    INT(8)      - Mtime (nanoseconds)
    INT(2)      - Mode  (st_mode from struct stat st_mode AND 0177777,
                         i.e. unix permissions and type of file)

    INT(4)      - num_xattrs
    FOR (i = 0; i < num_xattrs; i++) {
        CSTRING            - xattr name
        INT(4)             - xattrlen
        BSTRING(xattrlen)  - xattr value
    }