go Linux 暂停处理

func YesNO(choose bool) {
	userFile := "/dev/tty"
	if !choose {
	here:
		fmt.Printf("Continue (y/n):")
		fin, err := os.Open(userFile)
		defer fin.Close()
		if err != nil {
			fmt.Println(userFile, err)
			return
		}
		buf := make([]byte, 1024)
		for {
			n, _ := fin.Read(buf)
			if 0 == n || n > 1 {
				break
			}
		}
		switch string(buf[:2]) {
		case "y\n":
			fmt.Println("go on ...")
		case "n\n":
			fmt.Println("exit ...")
			os.Exit(1)
		default:
			goto here
		}
	}
}