This is what an entry in dir_info looks like: w/grendel:grendel:senior:1:1 What it means: w/grendel - the path grendel - the owner, the owner can read and write to this dir senior - the group, members of this group can read and write to this dir 1 - default read, if this is one , anyone can read this dir if 0, only the owner and group can read it 1 - setuid, if this is 1 an object in this dir can call seteuid(<owner>) if 0, it can't