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Diffstat (limited to 'src/Plugins/StdinReader.hs')
-rw-r--r-- | src/Plugins/StdinReader.hs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/Plugins/StdinReader.hs b/src/Plugins/StdinReader.hs new file mode 100644 index 0000000..2ee217e --- /dev/null +++ b/src/Plugins/StdinReader.hs @@ -0,0 +1,33 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Plugins.StdinReader +-- Copyright : (c) Andrea Rossato +-- License : BSD-style (see LICENSE) +-- +-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org> +-- Stability : unstable +-- Portability : unportable +-- +-- A plugin for reading from stdin +-- +----------------------------------------------------------------------------- + +module Plugins.StdinReader where + +import Prelude hiding (catch) +import System.Posix.Process +import System.Exit +import System.IO +import Control.Exception (SomeException(..),catch) +import Plugins + +data StdinReader = StdinReader + deriving (Read, Show) + +instance Exec StdinReader where + start StdinReader cb = do + cb =<< catch (hGetLineSafe stdin) (\(SomeException e) -> do hPrint stderr e; return "") + eof <- hIsEOF stdin + if eof + then exitImmediately ExitSuccess + else start StdinReader cb |