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[ghc-hetmet.git]
/
ghc
/
tests
/
lib
/
posix
/
posix014.hs
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--!! Basic pipe usage
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module Main(main) where
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import Posix
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main = do
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str <- getEffectiveUserName
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putStrLn str
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(rd, wd) <- createPipe
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n <- forkProcess
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case n of
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Nothing -> do
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(str,_) <- fdRead rd 32
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-- avoid them zombies
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putStrLn str
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Just pid -> do
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fdWrite wd "Hi, there - forked child calling"
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-- getProcessStatus False True pid
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return ()