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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.CommandReader
-- Copyright : (c) John Goerzen
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
-- Stability : unstable
-- Portability : unportable
--
-- A plugin for reading from external commands
-- note: stderr is lost here
--
-----------------------------------------------------------------------------
module Plugins.CommandReader where
import System.IO
import Plugins
import System.Process(runInteractiveCommand, getProcessExitCode)
data CommandReader = CommandReader String String
deriving (Read, Show)
instance Exec CommandReader where
alias (CommandReader _ a) = a
start (CommandReader p _) cb = do
(hstdin, hstdout, hstderr, ph) <- runInteractiveCommand p
hClose hstdin
hClose hstderr
hSetBinaryMode hstdout False
hSetBuffering hstdout LineBuffering
forever ph (hGetLineSafe hstdout >>= cb)
where forever ph a =
do a
ec <- getProcessExitCode ph
case ec of
Nothing -> forever ph a
Just _ -> cb "EXITED"
|
