> > How should I modify the function below so that characters
> are printed
> > out as they arrive?
> >
> > printchar :: Handle -> IO ()
> > printchar handle = do c <- hGetChar handle
> > putChar c
>
> Try using
> hSetBuffering handle NoBuffering
> hSetBuffering stdout NoBuffering
> from the IO library, before you call printchar. If the input handle
> is attached to a terminal, you may also need to adjust the terminal
> emulation into `cbreak' mode, e.g. with
> System.system "stty cbreak"
> Don't forget to reset the terminal afterwards!
GHC does the "stty cbreak" step for you, if the handle on which you set the buffering
mode is a terminal. Note also that not all systems have an 'stty' command.
Cheers,
Simon
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