client updates daemon: entropy resources lock handling

When the daemon is loaded, it should not take over the pid file.
Also, before trying to update the repositories, it should check
if the same resources are locked by something else.

services/client-updates-daemon

@@ -23,6 +23,9 @@
 from __future__ import with_statement
 import os
 import sys
+# this makes the daemon to not write the entropy pid file
+# avoiding to lock other instances
+sys.argv.append('--no-pid-handling')
 import time
 import gobject
 import dbus
@@ -174,6 +177,14 @@ class UpdatesDaemon(dbus.service.Object):
         if self.__updater == None:
             return 0
 
+        # entropy resources locked?
+        locked = self.Entropy._resources_run_check_lock()
+        if locked:
+            if DAEMON_DEBUG:
+                self.Entropy.updateProgress(
+                    "__run_fetcher: resources locked, skipping")
+            return 0
+
         if DAEMON_DEBUG:
             self.Entropy.updateProgress(
                 "__run_fetcher: called %s" % (time.time(),))