ldap_sync* how to

hi,

I needed to write a daemon which can react to changes on openldap server. It has to be an event driven application hence polling is ruled out. After some research, the most proper way seems to be through ldap sync however I could not find any documentation other than the man page of ldap_sync* which does not provide any example.

Does any body know of an introductory document or another way to achieve my purpose? In the worst case I will dive into slapd's implementation to have a feeling or simply use the logs as an event channel.

Thanks