Xprint support in OpenSSH?

[Roland Mainz]

Damien Miller wrote:
> > Does OpenSSH have any plans yet to extend the existing X11 forwarding
> > support to include Xprint  - the XOrg standard for printing?
> > Documentation can be found at http://xprint.mozdev.org/docs/
> >
> > The only change required to have Xprint support is to forward the X
> > print server connection referenced by the XPSERVERLIST environment
> > variable similar to the video display server referenced by the
> > DISPLAY environment variable.
> 
> We don't have any plans to support this at present - IIRC the protocol
> only allows forwarding of a single X channel.

You don't need to forward multiple X11 connections, it's usually
sufficient to forward the matching ports for the Xprint servers as they
are - like cupsd and lpd -  shared between multiple users on a per-host
or per-network basis ((there are exceptions like MacOSX/Darwin where
both video and print Xservers are started per-user instance) - and you
can't steal keystrokes etc. as Xprt is non-interactive (no keyboard, no
mouse) - the worst thing which could be done (in theory!) would be to
submit another print job to a printer) and modify the XPSERVERLIST
environment variable on the other side. In theory this can be done via
wrapper scripts but the task is non-trivial - direct support within
OpenSSH would be much more painless than the wrapper script hack.

> There was some discussion on the ietf-ssh at netbsd.org mailing list back
> in April on the issue of multiple X forwardings, but it seems to have
> fizzled out without producing a complete spec.

Is the discussion somewhere archived ?

----

Bye,
Roland

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