module Main where

import System.Posix.IO.Select
import System.Posix.IO.Select.Types
import System.Posix.IO
import System.Posix.Types
import System.IO

main :: IO ()
main = do
  fd <- handleToFd stdin
  n <- select'' [fd] [] [] (finite 5 500000)
  case n of
    0 ->  print "timeout"
    -1 -> error "select failed"
    _ ->  print "event"
  return ()