Added virtualbox service, which fixes the RandR problem and also keeps the guest's clock in sync with the host

svn path=/nixos/trunk/; revision=23672

modules/module-list.nix

@@ -68,6 +68,7 @@
   ./services/misc/nixos-manual.nix
   ./services/misc/rogue.nix
   ./services/misc/synergy.nix
+  ./services/misc/virtualbox.nix
   ./services/monitoring/monit.nix
   ./services/monitoring/nagios/default.nix
   ./services/monitoring/systemhealth.nix

modules/services/misc/virtualbox.nix

@@ -0,0 +1,46 @@
+# VirtualBox server
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+
+  cfg = config.services.virtualbox;
+
+in
+
+{
+
+  ###### interface
+  
+  options = {
+  
+    services.virtualbox = {
+    
+      enable = mkOption {
+        default = false;
+        description = "Whether to enable the VirtualBox service and other guest additions.";
+      };        
+
+    };
+    
+  };
+  
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    environment.systemPackages = [ ];
+    
+    jobs.virtualbox =
+      { description = "VirtualBox service";
+      
+        startOn = "started udev";
+
+        exec = "${pkgs.linuxPackages.virtualboxGuestAdditions}/sbin/VBoxService";
+      };
+
+  };
+
+}