Hi,
I'd expect the following program (compiled with ghc and without any
specieal flags) to produce
Just (Exited ExitSuccess)
True
but it produces
Just (Exited ExitSuccess)
False
on Debian Lenny (ghc-6.8), OpenBSD-current (ghc-6.12.3), OpenBSD-current
(ghc=7.0 from the 7.0 branch).
module Main where
import Data.IORef
import System.Posix.Process
import System.Posix.Signals
import System.Posix.Unistd
main = do
caughtCHLD <- newIORef False
installHandler sigCHLD (Catch $ writeIORef caughtCHLD True)
Nothing
pid <- forkProcess $ sleep 2 >> return ()
s <- sleep 8
getProcessStatus False False pid >>= print
readIORef caughtCHLD >>= print
The sigCHLD handler is never called in this program. Is this expected
behaviour? If so, why?
Ciao,
Kili
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