correcting permission on Informix

As it is known, in the directory with the Informix's program files, there is a necessity that some of these files must have particular rights and/or owner, group, etc... If the permissions or the ownership of these particular files change for one reason or another, the system stops being operational. Is there any method which enables us to restore the correct permissions and/or ownership of these special files, if by mistake there is a change on them, without having to re-install the entire environment ? We thank you. Andrea Antonello