It is sometimes possible for a non-root to restore group ids (when obnam process is in the group already). Should obnam try to do that? (Based on suggestion from Gonéri Le Bouder.) --liw
Seems like obnam should just try to restore whatever it has, and produce an error if it can't.-- Josh
GNU Tar has the same issue. I should probably make Obnam have the same behavior as tar. I expect that'll give people the fewest nasty surprises. Now I just need to figure out what tar does. --liw
GNU Tar does not restore the group even if the user is in the group, unless the user is root. I will keep this behavior with Obnam, since it should be the least risky surprise: there is the least chance of a privilege escalation from this. --liw