I don't think either of those is a special rule, or undocumented. Indeed, I can't think of any behaviour that isn't covered in section 5.
Following an attach, you're at the root, and a walk with no qids will leave you there, so stat will just work, although I don't know anything that relies on that. Walk of ".." in the root of a file system leaves you there (see walk(5)). On 21 December 2012 18:23, steve <st...@quintile.net> wrote: > the initial stat of a zero length name should return the Dir > of the root dir. > > and a walk up to the root directory tells mount driver that > you want to pass control back to the parent filesystem.
