I tried the code below with both ghc 6.2.2 and hugs march 2005. ghc: "The last statement in a 'do' construct must be an expression" Hugs ERROR "interactive.hs" - Can't find imported module "System.Process" .

---------------------------------------------------------------------------------- import System.IO import System.Process

eval :: String -> IO String eval s = do (_,hOutput,_,hProcess) <- runInteractiveCommand s sOutput <- hGetContents hOutput waitForProcess hProcess return sOutput ----------------------------------------------------------------------------------

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