使用SIGINT退出node.js命令行应用程序

Question

这一切都正确吗？

var sigintCount = 0;

process.on('SIGINT', () => {
    console.log('Got your SIGINT => Press Control-C *twice* to exit.');
    sigintCount++;
    if(sigintCount > 1){
        process.exit();   //what is an appropriate exit code?
    }
});

我应该使用什么退出代码？