Todd Vierling <tv@pobox.com> writes:
> The portal idea lends itself to an extension of that idea--a filesystem
> almost completely implemented in userland.  I propose such a file system,
> tentatively named "tunnel." 

The good news: I have almost implemented this twice.

The bad news: the first one works under SunOS and is only partially
ported to NetBSD.  If you are really interested and willing to hack on
it, send me mail and I can send you the code.  The second one works
under HP/UX and you can't have it (yet).  Sorry.

They both work by communicating with a daemon over a character device
and keeping a small cache of vnodes in the kernel that's serviced by
the daemon.

/assar