```

func gracefulShutdown() {
    c := make(chan os.Signal, 1)
    gosignal.Notify(c, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)
    go func() {
        // cleanup the socket on shutdown.
        sig := <-c
        Close()
        ret := 1
        if sig == syscall.SIGTERM {
            ret = 0
        }
        os.Exit(ret)
    }()
}

```