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package fat-filesystem
KV_RO is a read-only key=value store backed by a simple FAT filesystem on a block device.
Parameters
module B : Mirage_block.SSignature
include Mirage_kv.RO
Read-only key-value stores
The type for errors.
val disconnect : t -> unit Lwt.tDisconnect from the key-value store. While this might take some time to complete, it can never result in an error.
type key = Mirage_kv.Key.tThe type for keys.
exists t k is Some `Value if k is bound to a value in t, Some `Dictionary if k is a prefix of a valid key in t and None if no key with that prefix exists in t.
exists answers two questions: does the key exist and is it referring to a value or a dictionary.
An error occurs when the underlying storage layer fails.
get t k is the value bound to k in t.
The result is Error (`Value_expected k) if k refers to a dictionary in t.
list t k is the list of entries and their types in the dictionary referenced by k in t.
The result is Error (`Dictionary_expected k) if k refers to a value in t.
last_modified t k is the last time the value bound to k in t has been modified.
The modification time (d, ps) is a span for the signed POSIX picosecond span d * 86_400e12 + ps. d is a signed number of POSIX days and ps a number of picoseconds in the range [0;86_399_999_999_999_999L].
When the value bound to k is a dictionary, the modification time is the latest modification of all entries in that dictionary. This behaviour is only one level deep and not recursive.
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