System

This library describes the interaction of the program with the operating system.

module System ( 
 ExitCode(ExitSuccess,ExitFailure),
 getArgs, getProgName, getEnv, system, exitWith, exitFailure
 ) where
data ExitCode = ExitSuccess | ExitFailure Int 
 deriving (Eq, Ord, Read, Show)
getArgs :: IO [String]
getProgName :: IO String
getEnv :: String -> IO String
system :: String -> IO ExitCode
exitWith :: ExitCode -> IO a
exitFailure :: IO a