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(*                                                                        *)
(*  Menhir                                                                *)
(*                                                                        *)
(*  François Pottier and Yann Régis-Gianas, INRIA Rocquencourt            *)
(*                                                                        *)
(*  Copyright 2005 Institut National de Recherche en Informatique et      *)
(*  en Automatique. All rights reserved. This file is distributed         *)
(*  under the terms of the Q Public License version 1.0, with the         *)
(*  change described in file LICENSE.                                     *)
(*                                                                        *)
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(* Input-output utilities. *)

(* [exhaust channel] reads all of the data that's available on [channel]. *)

val exhaust: in_channel -> string

(* [invoke command] invokes an external command (which expects no input)
   and returns its output, if the command succeeds. It returns [None] if
   the command fails. *)

val invoke: string -> string option

(* [winvoke writers command cleaners] invokes each of the [writer]
   functions, invokes the command [command], and runs each of the
   [cleaner] functions. Then, it either returns the command's output,
   if the command succeeded, or exits, otherwise. *)

val winvoke: (unit -> unit) list -> string -> (unit -> unit) list -> string