No, it's deeper than that. They are describing the capabilities of a process handed a file descriptor, which means it does not have a path at all. There's no wa

No, it's deeper than that. They are describing the capabilities of a process handed a file descriptor, which means it does not have a path at all. There's no way to resolve '..' relative to no path. Compare that to a POSIX system where a directory has an actual child which is a reference to the directory's parent whose name is always '..'. The talk about resolving '..' is merely a demonstration that the behavior of "cd .." can be supported/emulated in a context where you have both an open directory and corresponding path, without requiring that '..' literally exist.