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(**************************************************************************)
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(* Fran�ois Pottier, INRIA Rocquencourt *)
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(* Yann R�gis-Gianas, PPS, Universit� Paris Diderot *)
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(* Copyright 2005-2008 Institut National de Recherche en Informatique *)
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(* et en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0, with the change *)
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(* described in file LICENSE. *)
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(**************************************************************************)
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(* Input-output utilities. *)
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(* ------------------------------------------------------------------------- *)
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(* [exhaust channel] reads all of the data that's available on [channel]. *)
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let buffer = Buffer.create chunk_size in
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let chunk = String.create chunk_size in
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let length = input channel chunk 0 chunk_size in
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Buffer.contents buffer
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Buffer.add_substring buffer chunk 0 length;
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(* ------------------------------------------------------------------------- *)
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(* [invoke command] invokes an external command (which expects no
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input) and returns its output, if the command succeeds. It returns
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[None] if the command fails. *)
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let ic = Unix.open_process_in command in
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let result = exhaust ic in
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match Unix.close_process_in ic with
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(* ------------------------------------------------------------------------- *)
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(* [winvoke writers command cleaners] invokes each of the [writer]
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functions, invokes the command [command], and runs each of the
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[cleaner] functions. Then, it either returns the command's output,
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if the command succeeded, or exits, otherwise. *)
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let winvoke writers command cleaners =
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List.iter call writers;
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let output = invoke command in
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List.iter call cleaners;
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(* Stop if the command failed. Otherwise, return its output. *)
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(* Presumably, the command printed an error message for us. *)
added
removed
src/IO.ml
