ref: ffda7053c7418a374fe16ed1c7da8a024cfe7523
dir: /lib/System/Process.hs/
module System.Process(callCommand) where import Prelude(); import MiniPrelude import Control.Monad(when) import Foreign.C.String foreign import ccall "system" systemc :: CString -> IO Int callCommand :: String -> IO () callCommand cmd = do r <- withCAString cmd systemc when (r /= 0) $ error $ "callCommand: failed " ++ show r ++ ", " ++ show cmd