Method RegisterSignalHook

endless.go:550–563

* RegisterSignalHook registers a function to be run PRE_SIGNAL or POST_SIGNAL for a given signal. PRE or POST in this case means before or after the signal related code endless itself runs */

(prePost int, sig os.Signal, f func())

related code endless itself runs
*/
func (srv *endlessServer) RegisterSignalHook(prePost int, sig os.Signal, f func()) (err error) {
	if prePost != PRE_SIGNAL && prePost != POST_SIGNAL {
		err = fmt.Errorf("Cannot use %v for prePost arg. Must be endless.PRE_SIGNAL or endless.POST_SIGNAL.", sig)
		return
	}
	for _, s := range hookableSignals {
		if s == sig {
			srv.SignalHooks[prePost][sig] = append(srv.SignalHooks[prePost][sig], f)
			return
		}
	}
	err = fmt.Errorf("Signal %v is not supported.", sig)
	return
}