Magento Image upload and set permission in custom module

$uploader = new Varien_File_Uploader('fileinputname');
     $uploader->setAllowedExtensions(array('jpg','jpeg','gif','png'));
     $uploader->setAllowRenameFiles(false);
     $uploader->setFilesDispersion(false);

     $path = Mage::getBaseDir('media') .DS. 'foo'.DS ;

      if(!is_dir($path))
        mkdir($path, 0777, true);

     $uploader->save($path, $_FILES['fileinputname']['name']);