Other thoughts:
When it comes to ownership, my thinking is rather simplistic on the matter rather than looking at it from the perspective of a detailed set of ACLs. All I’m trying to mimic is “chown user:group some/safenfs/path” and “chmod 754 some/safenfs/path”. Not sure if it’s accurate to call this “posix compliant” but this is the perspective from which I’m looking at things. The user:group way to organize things is nice because one could have a ‘friends’ group or a ‘family’ group and associate it with a directory or file to facilitate sharing. Of course this also requires that I mimic ‘useradd’ and ‘groupadd’ functionality etc. I found some good discussion on this here.
Any other updates/insights/suggestions would be helpful.