diff --git a/api/src/Vfs.php b/api/src/Vfs.php
index 36a18fdaba..298e73807d 100644
--- a/api/src/Vfs.php
+++ b/api/src/Vfs.php
@@ -1937,8 +1937,11 @@ class Vfs extends Vfs\StreamWrapper
 	 *
 	 * @param array $src contains the source file
 	 * @param string $dst is the destination directory
+	 * @param int& $errs =null on return number of errors happened
+	 * @param array& $copied =null on return files copied
+	 * @return boolean true for no errors, false otherwise
 	 */
-	static public function copy_files(array $src, $dst, &$errs, array &$copied)
+	static public function copy_files(array $src, $dst, &$errs=null, array &$copied=null)
 	{
 		if (self::is_dir($dst))
 		{
diff --git a/api/src/Vfs/Sharing.php b/api/src/Vfs/Sharing.php
index 621445a679..e55cd29ae9 100644
--- a/api/src/Vfs/Sharing.php
+++ b/api/src/Vfs/Sharing.php
@@ -460,7 +460,7 @@ class Sharing
 			if ($mode == 'link')
 			{
 				$user_tmp = '/home/'.$GLOBALS['egw_info']['user']['account_lid'].'/.tmp';
-				if (!Vfs::file_exists($user_tmp) && !Vfs::mkdir($user_tmp))
+				if (!Vfs::file_exists($user_tmp) && !Vfs::mkdir($user_tmp, null, STREAM_MKDIR_RECURSIVE))
 				{
 					throw new Api\Exception\AssertionFailed("Could NOT create temp. directory '$user_tmp'!");
 				}
@@ -468,7 +468,7 @@ class Sharing
 				do {
 					$tmp_file = Vfs::concat($user_tmp, ($n?$n.'.':'').Vfs::basename($name));
 				}
-				while(!(is_dir($path) && Vfs::mkdir($tmp_file) ||
+				while(!(is_dir($path) && Vfs::mkdir($tmp_file, null, STREAM_MKDIR_RECURSIVE) ||
 					!is_dir($path) && (!Vfs::file_exists($tmp_file) && ($fp = Vfs::fopen($tmp_file, 'x')) ||
 						// do not copy identical files again to users tmp dir, just re-use them
 						Vfs::file_exists($tmp_file) && Vfs::compare(Vfs::PREFIX.$tmp_file, $path))) && $n++ < 100);