val call : 
  ?exec:bool ->
  ?stdout:Unix.file_descr ->
  ?y:bool ->
  string list ->
  string list ->
  unitval init : ?y:bool -> ?switch:string -> ?edition:string -> unit -> unitval run : 
  ?y:bool ->
  ?error:exn option Stdlib.ref ->
  ?switch:string ->
  ?edition:string ->
  string list ->
  string list ->
  unitval exec : ?exec:bool -> ?stdout:Unix.file_descr -> string list -> unit