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import System.Exit (ExitCode(..), exitWith)
import System.Posix.Process
import System.Posix.Signals
main = do test1
test2
test3
test4
putStrLn "I'm happy."
test1 = do
forkProcess $ raiseSignal floatingPointException
Just (pid, tc) <- getAnyProcessStatus True False
case tc of
Terminated sig _ | sig == floatingPointException -> return ()
_ -> error "unexpected termination cause"
test2 = do
forkProcess $ exitImmediately (ExitFailure 42)
Just (pid, tc) <- getAnyProcessStatus True False
case tc of
Exited (ExitFailure 42) -> return ()
_ -> error "unexpected termination cause (2)"
test3 = do
forkProcess $ exitImmediately ExitSuccess
Just (pid, tc) <- getAnyProcessStatus True False
case tc of
Exited ExitSuccess -> return ()
_ -> error "unexpected termination cause (3)"
test4 = do
forkProcess $ raiseSignal softwareStop
Just (pid, tc) <- getAnyProcessStatus True True
case tc of
Stopped sig | sig == softwareStop -> do
signalProcess killProcess pid
Just (pid, tc) <- getAnyProcessStatus True True
case tc of
Terminated sig _ | sig == killProcess -> return ()
_ -> error "unexpected termination cause (5)"
_ -> error "unexpected termination cause (4)"
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