package mainimport "fmt"import "os"import "os/signal"import "syscall"func main() {	go SignalProc()	done := make(chan bool, 1)	for {		select {		case <-done:			break		}	}	fmt.Println("exit")}func SignalProc() {	sigs := make(chan os.Signal)	signal.Notify(sigs, syscall.SIGINT, syscall.SIGUSR1, syscall.SIGUSR2, syscall.SIGHUP, os.Interrupt)	for {		msg := <-sigs		fmt.Println("Recevied signal:", msg)		switch msg {		default:			fmt.Println("get sig=%v\n", msg)		case syscall.SIGHUP:			fmt.Println("get sighup\n")		case syscall.SIGUSR1:			fmt.Println("SIGUSR1 test")		case syscall.SIGUSR2:			fmt.Println("SIGUSR2 test")		}	}}