guest/lib/darwin.js

Lets you enable or disable guest account access on Linux, Mac and Windows.

var exec  = require('child_process').exec,
    sudo  = require('sudoer').exec,
    async = require('async'),
    user  = require('roster');

var bin = '/usr/bin/defaults';

/*
// these allow guests to connect to shared folders
var properties = [ 
  '/Library/Preferences/com.apple.AppleFileServer guestAccess',
  '/Library/Preferences/SystemConfiguration/com.apple.smb.server AllowGuestAccess'
];
*/

// this one is for Lion. more info here:
// http://osxdaily.com/2011/10/13/disable-guest-user-account-mac-os-x-10-7-2-login-screen/ 
// var lion = '/Library/Preferences/com.apple.FindMyMac HideRestartToSafari';

var properties = [
  '/Library/Preferences/com.apple.loginwindow GuestEnabled'
]

var guest_user_opts = {
  user      : 'Guest',
  full_name : 'Guest User',
  user_id   : 201,
  group_id  : 201,
  guest     : true
}

function create_user(cb) {
  user.create(guest_user_opts, cb);
}

function toggle(enabling, cb) {

  var go = function() {
    var val = enabling ? 'YES' : 'NO';

    var fx = properties.map(function(property) {
      return function(cb) {
        var args = ' write ' + property + ' -bool ' + val;
        sudo(bin + args, cb);
      }
    })

    async.parallel(fx, function(err, results) {
      if (err) return cb(err);

      exports.check(function(err, enabled) {
        if (err) return cb(err);

        // 'enabled' var could be false and 'enabling' var too
        if (enabled === enabling)
          return cb();

        return cb(new Error('Failed to enable: ' + str))
      });
    })
  }

  user.exists(guest_user_opts.user, function(exists) {
    if (enabling && !exists)
      return create_user(go);

    // should we remove the account as well?
    // if (!enabling && exists)
    //  return delete_user(go);

    go()
  })
}

exports.check = function(cb) {

  var fx = properties.map(function(property) {
    return function(cb) {
      var cmd = bin + ' read ' + property;
      exec(cmd, cb);
    }
  })

  user.exists(guest_user_opts.name, function(exists) {
    if (exists) return cb(new Error('Guest user account not found.'))

    async.parallel(fx, function(err, results) {
      if (err) return cb(err);

      // make sure all properties returned a 1
      var integers = results.map(function(el) { return parseInt(el[0]) });
      var enabled = integers.indexOf(0) === -1;

      cb(null, enabled);
    })
  })

}

exports.enable = function(cb) {
  toggle(true, cb);
}

exports.disable = function(cb) {
  toggle(false, cb);
}