Why is ‘.’ a hard link in Unix?
I’ve seen many explanations for why the link count for an empty directory in Unix based OSes is 2 instead of 1. They all say that it’s because of the ‘.’ directory, which every directory has pointing back to itself. I understand why having some concept of ‘.’ is useful for specifying relative paths, but what is gained by implementing it at the filesystem level? Why not just have shells or the system calls that take paths know how to interpret it?