Re: patch for fs/dcache race
H. Peter Anvin (hpa@transmeta.com)
Wed, 13 Aug 1997 01:27:56 -0700 (PDT)
>
> the rules are so simple if we define 'components', and allow _zero_
> components too. Components are separated by '/'.
>
> '/////////////xxx' means: alot of zero components, plus the "xxx"
> component. No 'slash after slash', just components.
>
> A 'full' pathname is a pathname that starts with a zero component.
>
> Components form a tree, a series of components identifies a node in the
> tree. These are the rules to identify a node in the tree:
>
> "" and "." are identity
> ".." means down in the tree
> anything else means up in the tree
>
> user-supplied component-series are _always_ relative to some node in the
> tree. If the first component is a zero component, then the starting point
> is current->fs->root, otherwise it's current->cwd.
>
> The Posix '//' thing can be considered a serious and pointless hack ... we
> can do everything with the above scheme already.
>
Pot-ei-to Pot-ah-to...
POSIX tends to define things in terms of effect, not implementation;
it's the same thing anyway...
-hpa