runInteractiveProcess and buffering
lemming at henning-thielemann.de
Fri Oct 12 16:17:01 EDT 2007
It looks like my problem has to do with buffering, but I don't know how to
main :: IO ()
do (inp,out,err,pid) <-
runInteractiveProcess "aseqdump" ["-p", "72:0"] Nothing Nothing
hSetBuffering out NoBuffering
hGetBuffering out >>= print
hGetLine out >>= putStrLn
The data of 'out' seems to be buffered, because 'aseqdump' must produce
many lines until even the first one is returned by 'hGetLine' and printed
by 'putStrLn'. I tried to disable buffering for 'out' and indeed
'NoBuffering' is printed to the terminal, but the output from 'aseqdump'
is still deferred.
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