check if directory already exist before executing mkdir

lib/fileproxy/fileoperations.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * ownCloud
+ *
+ * @author Bjoern Schiessle
+ * @copyright 2012 Bjoern Schiessle <schiessle@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * check if standard file operations
+ */
+ 
+class OC_FileProxy_FileOperations extends OC_FileProxy{
+	static $rootView;
+	private $userQuota=-1;
+
+	public function premkdir($path) {
+		if(!self::$rootView){
+			self::$rootView = new OC_FilesystemView('');
+		}
+		return !self::$rootView->file_exists($path);
+	}
+	
+}

lib/util.php

@@ -49,7 +49,9 @@ class OC_Util {
 			OC_Filesystem::mount('OC_Filestorage_Local', array('datadir' => $user_root), $user);
 			OC_Filesystem::init($user_dir);
 			$quotaProxy=new OC_FileProxy_Quota();
+			$fileOperationProxy = new OC_FileProxy_FileOperations();
 			OC_FileProxy::register($quotaProxy);
+			OC_FileProxy::register($fileOperationProxy);
 			// Load personal mount config
 			if (is_file($user_root.'/mount.php')) {
 				$mountConfig = include($user_root.'/mount.php');