+ $lock_filename = "update_feeds.lock";
+
+ $lock_handle = make_lockfile($lock_filename);
+
+ // Try to lock a file in order to avoid concurrent update.
+ if (!$lock_handle) {
+ die("error: Can't create lockfile ($lock_filename). ".
+ "Maybe another process is already running.\n");
+ }
+
+ // Create a database connection.