ref: d83461490ff91b5014c8e5ec053a6ada7a76c23a
dir: /lib/System/Process.hs/
module System.Process(callCommand) where
import Prelude
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