By default, index files are available for reading and writing by everyone.
It's possible to override this with the
Zend_Search_Lucene_Storage_Directory_Filesystem::setDefaultFilePermissions()
method:
<?php
// Get current default file permissions
$currentPermissions =
Zend_Search_Lucene_Storage_Directory_Filesystem::getDefaultFilePermissions();
// Give read-writing permissions only for current user and group
Zend_Search_Lucene_Storage_Directory_Filesystem::setDefaultFilePermissions(0660);