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How to use ldapsearch -Esync ?


I'm writing a script that acts on changes in LDAP. I want it to watch the stream of changes, and if the script gets restarted, pick up where it left off. I'm hoping to just be able to pipe ldapsearch -Esync into an LDIF parser -- instead of using the C API.

I can get all of the changes with the -Esync=ro option and stream the changes with -Esync=rp, but I can't seem to find the magic combination to pick up where it left off.

I tried the command mentioned in the "Replication from OpenLDAP to Fedora 389 DS" thread[1], but no matter what cookie I use (the final control value either as a base64 string or decoded) I can't seem to get it to pick up where it left off.

Is my understanding wrong or am I missing something?

This is how I understand/expect it to work:

ldapsearch ... -Esync=ro
# get everything, plus a cookie at the end.
# feed the cookie to the next command
ldapsearch ... -Esync=ro/cookie
# get everything since the last search

Any help would be greatly appreciated.


[1] http://www.openldap.org/lists/openldap-technical/201402/msg00327.html