You mean this? http://inventors.about.com/od/tstartinventions/ss/TelephonePatent.htm
On 2/14/16, Prof Brucee <prof.bru...@gmail.com> wrote: > Totally agree. I've never needed exportfs filtering. It's not in the > patent. > On 14/02/2016 1:27 AM, "Charles Forsyth" <charles.fors...@gmail.com> wrote: > >> >> On 22 December 2015 at 10:02, arisawa <aris...@ar.aichi-u.ac.jp> wrote: >> >>> >>> The difficulty is in the pattern matching rule. >>> If we want to export only /usr/glenda, then the pattern matching filer >>> must pass >>> /usr >>> /usr/glenda >>> and must not pass >>> /usr/ >>> >> >> I really wonder about the pattern-matching code being there at all. >> Without it, exportfs is constrained by the authenticated user's >> permissions, within the exported name space, >> and that's enforced by the operating system (system calls). >> To export only /usr/glenda, I'd build a name space that has only >> /usr/glenda in it, and export that. >> >> The read-only option is enforced by exportfs itself, but at the 9P level: >> it's not too hard to enumerate >> the messages and options that do not cause modifications and reject all >> others (although exportfs wasn't updated to include an >> option added later to open). Still, that can be got right once for all by >> exportfs. >> >
