Using NFSv4 ACLs on Solaris/Opensolaris with the acl.2 API
The available API documentation is terse and the source is convoluted. I had to write me a simple ls implementing ACL printing in order to learn how to use the naked acl.2 API.
You might also want to read the <sys/acl.h> include !
Horde Vacation Driver for Postfix virtual SQL User Setup
Just in case it gets lost in Horde's buqtracking system:
if you want to use the vacation module in a Postfix virtual user setup which Vacation doesn't support with its drivers, here is a driver that will connect to your SQL Postfix tables.