Re: howto: 2 users interactively edit the same file ?

[Matt Carlson]

* kgold (kgold@watson.ibm.com) wrote:
> Tim X <timx@spamto.devnul.com> writes:
> > 
> > Have you actually tried this? 
> > 
> > I find it amazing this will work. The big problem is how can emacs,
> > which doesn't support threads, handle simultaneous input from two
> > distinct frames? I can't see how it can handle input from two
> > different input devices simultaneously either. The physical displaying
> > of the frame on another display is easy enough to understand - this is
> > a feature of X windows which emacs is able to take advantage of when
> > it is built with X lib support - but coping with input from two
> > sources at the same time is a very different matter. 
> > 
> > I'm very much looking forward to seeing how this can be done and wish
> > I had a second computer handy so that I could experiment for
> > myself. I've redirected windows to remote displays before under X and
> > that works quite will - it will be interesting to see how emacs can
> > deal with the concurrency of two users. I hope the OP will keep us
> > informed as to progress.
> 
> I just tried it again - works fine.  I used to do this all the time
> for instant messaging sessions before IM was invented.
> 
> One machine was a pSeries running AIX and another was a Thinkpad
> running Linux.
> 
> Warning: There is an obvious security issue, as the frame recipient
> can start a shell and become you.  So you have to trust your partner.

Excellent point.

We've now got everything working just as I'd hoped.  After
finding out about make-frame-on-display (and frames in general)
it was really pretty simple.  Actually, the xauth stuff took more 
fussing than did emacs.  But-- it's working perfectly now.

Thanks to all of you for your help.

-regards, 
Matt

> 
> -- 
> Ken Goldman   kgold@watson.ibm.com   914-784-7646
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