From e3853a9cb2a9a2cffa174d1334e2ca8ba610f151 Mon Sep 17 00:00:00 2001 From: Jose Antonio Ortega Ruiz Date: Tue, 21 Dec 2010 02:36:35 +0100 Subject: Haskell sources moved to src/ to unclutter toplevel --- src/Plugins/CommandReader.hs | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/Plugins/CommandReader.hs (limited to 'src/Plugins/CommandReader.hs') diff --git a/src/Plugins/CommandReader.hs b/src/Plugins/CommandReader.hs new file mode 100644 index 0000000..7c7c92d --- /dev/null +++ b/src/Plugins/CommandReader.hs @@ -0,0 +1,39 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Plugins.CommandReader +-- Copyright : (c) John Goerzen +-- License : BSD-style (see LICENSE) +-- +-- Maintainer : Jose A. Ortega Ruiz +-- 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" -- cgit v1.2.3