Re: [9fans] Copying pushtls(2)

[David Presotto <presotto@closedmind.org>]

On Fri Aug  8 08:50:32 EDT 2003, lucio@proxima.alt.za wrote:
> Can the technique used in pushtls(2) of passing an open file
> descriptor to a filter device work with a user-space file server?

Not really.  It only works in tls/ssl/srv because the driver is
really running in the context of the process, i.e., its not really
fd passing, just using your own fd's.  9P doesn't have a concept
of fd passing.  I've often wondered if it should but get scared
of the mechanism's complexity when used across machines.

> If that technique is not viable, is there perhaps another mechanism
> that can be used analogously?  An existing example would be a nice
> pointer.

You can post the fd into /srv and pass a pointer to that.  Currently,
one can't change the owner of /srv files, but it should.