walker.js

var fs = require("fs");
var util = require("util");

function walkSync(filename, cb) {
  try {
    var stat = fs.lstatSync(filename);
    if(stat.isDirectory()) {
      try {
        if(cb(null, filename, stat)) {
          var files = fs.readdirSync(filename);
          for(var i=0; i<files.length; i++) {
            if(filename == "/") {
              walkSync(filename + files[i], cb);
            }
            else {
              walkSync(filename + "/" + files[i], cb);
            }
          }
        }
      }
      catch(ex) {
        cb(ex);
      }
    }
    else {
      cb(null, filename, stat);
    }
  }
  catch(ex) {
    cb(ex);
  }
}

function walk(filename, cb) {
  fs.lstat(filename, function (err, stat) {
    if(!err) {
      if(stat.isDirectory()) {
        if(cb(null, filename, stat)) {
            fs.readdir(filename, function(err, files) {
            if(!err) {
              for(var i=0; i<files.length; i++) {
                if(filename == "/") {
                  walk(filename + files[i], cb);
                }
                else {
                  walk(filename + "/" + files[i], cb);
                }
              }
            }
            else {
              cb(err);
            }
          });
        }
      }
      else {
        cb(null, filename, stat);
      }
    }
    else {
      cb(err, filename);
    }
  });
}

var disallowed = {
  "/media/storage": true,
  "/media/storage2": true,
  "/media/storage3": true,
  "/media/raid1500": true
};

var ctr= 0;
function foo(err, name, stat) {
  if(err) {
    util.debug(err);
    return false;
  }
  console.log(["[",ctr++,"] ",name].join(''));
  return !(name in disallowed);
};

process.argv.forEach(function(val, index, array) {
  if (index > 1) walk(val, foo);
});