4 sequence (map hIsOpen [stdin, stdout, stderr]) >>= \ opens ->
6 sequence (map hIsClosed [stdin, stdout, stderr]) >>= \ closeds ->
8 sequence (map hIsReadable [stdin, stdout, stderr]) >>= \ readables ->
10 sequence (map hIsWritable [stdin, stdout, stderr]) >>= \ writables ->
12 sequence (map hIsBlockBuffered [stdin, stdout, stderr]) >>= \ buffereds ->
14 sequence (map hIsLineBuffered [stdin, stdout, stderr]) >>= \ buffereds ->
16 sequence (map hIsNotBuffered [stdin, stdout, stderr]) >>= \ buffereds ->
19 hIsBlockBuffered h = hGetBuffering h >>= \ b -> return $ case b of { BlockBuffering _ -> True; _ -> False }
20 hIsLineBuffered h = hGetBuffering h >>= \ b -> return $ case b of { LineBuffering -> True; _ -> False }
21 hIsNotBuffered h = hGetBuffering h >>= \ b -> return $ case b of { NoBuffering -> True; _ -> False }