Client.IO
type 'a t = 'a Lwt.t
val return : 'a -> 'a t
val (>>=) : 'a t -> ('a -> 'b t) -> 'b t
type backend = [
| `xen
| `unix
]
val backend : backend
type channel
val create : unit -> channel t
val destroy : channel -> unit t
val read : channel -> bytes -> int -> int -> int t
val write : channel -> bytes -> int -> int -> unit t