fs-lock 介绍
fs-lock 是 Node.js的文件限制，用纯 JavaScript 写成，用户可以加载其他方法获取访问。
示例代码：
//Do your startup code here, then lock it down with:
require('fs-lock')({
'file_accessdir': [ __dirname, '/tmp' ],
'open_basedir': [ '/usr/local/share/node_modules', __dirname ]
});var fs = require('fs');
fs.readFile('/etc/passwd', function(err, data) {
//this will throw an Access Denied error});