mutable is_degraded : bool; | 
mutable is_link : string -> bool; | 
mutable run_and_open : a. string -> (in_channel -> 'a) -> 'a; | 
mutable readlink : string -> string; | 
mutable execute_many : ?max_jobs:int -> ?ticker:(unit -> unit) -> ?period:float ->
?display:((out_channel -> unit) -> unit) ->
(unit -> string) list list -> (bool list * exn) option; | 
mutable report_error : Format.formatter -> exn -> unit; | 
mutable at_exit_once : (unit -> unit) -> unit; | 
mutable gettimeofday : unit -> float; | 
mutable stdout_isatty : unit -> bool; | 
mutable stat : string -> stats; | 
mutable lstat : string -> stats; |