gistfile1.txt

function do_something_with_dir_list(stdout) {
  res.render('index', {
    title: 'MyPage',
    subtitle: 'Below is a directory listing',
    results: stdout
  });
}

function dir_list(dir_list_done) {
  var sys = require('sys');
  var exec = require('child_process').exec
  exec('ls -la', function(error, stdout, stderr) {
    return dir_list_done(stdout);
  });
}

app.get('/', function(req, res){
  dir_list(do_something_with_dir_list);
});