golang os.Signal跳出循环

func main() {
    c := make(chan os.Signal, 1)
    signal.Notify(c, os.Interrupt, os.Kill)
    for {
        select {
        case s := <-c:
            fmt.Println("Got signal:", s)
            os.Exit(0)
        default:
            fmt.Println("okok")
            time.Sleep(time.Second * 1)
        }
    }
}