detect elevated privilege execution in windows

var child_process = require('child_process');

child_process.exec('fsutil dirty query %systemdrive%', function(err, stdout){
    if(err){
        console.log('error', err);  //Not OK      
        return;
    }
    //OK, privileged
});

要偵測是否是 UAC Privilege escalation，直接檢查是否Administrator並不可行，而是透過執行特定command來確認目前的執行是否是elevated privilege
這種作法在nodejs中不必在整合C API

參考: https://stackoverflow.com/questions/4051883/batch-script-how-to-check-for-admin-rights