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import Control.Monad
import System.IO
import System.Exit
import System.Environment
import Control.Exception
import qualified System.ZMQ3 as ZMQ
import qualified Data.ByteString as SB
import qualified Data.ByteString.Char8 as CS
main :: IO ()
main = do
args <- getArgs
when (length args < 1) $ do
hPutStrLn stderr "usage: display <address> [<address>, ...]"
ZMQ.withContext $ \c ->
ZMQ.withSocket c ZMQ.Sub $ \s -> do
ZMQ.subscribe s ""
mapM (ZMQ.connect s) args
forever $ do
line <- ZMQ.receive s
CS.putStrLn line
hFlush stdout
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