unblock

unblock :: IO a -> IO a
base Control.Exception.Base, base Control.Exception, base Control.OldException
Note: this function is deprecated, please use mask instead. To re-enable asynchronous exceptions inside the scope of block, unblock can be used. It scopes in exactly the same way, so on exit from unblock asynchronous exception delivery will be disabled again.
unblockSignals :: SignalSet -> IO ()
unix System.Posix.Signals
unblockSignals mask calls sigprocmask with SIG_UNBLOCK to remove all interrupts in mask from the set of blocked interrupts.