On Feb 7, 2007, at 1:05 AM, Donald Bruce Stewart wrote:
mail:
Hi,
Am Dienstag, den 06.02.2007, 15:56 +0100 schrieb Fawzi Mohamed:
I am replying to myself, but anyway with it seems (from the documentation) that
forkIO (do{ waitForProcess pid; return () })
is the best solution, and does not seem to lead to wasted resources.
This does not work for me. According to strace, the spawned process is in a blocking write, the haskell process is in a blocking waitpid, and I am sure that the program would consume all output.
Any difference with -threaded ?
strange for me it works beautifully, even without -threaded, maybe your process writes to stderr? you could do something like forkIO (do{ length(hGetContents err); return () }) (not tested) if you are not interested to the error output (and maybe also a length of the input to be sure that you have read it all... Fawzi