Re: emacsclient over ssh

[tomas@tuxteam.de]

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On Wed, Jun 24, 2009 at 11:47:19PM -0500, Harry Putnam wrote:

[...]

> Well, like I mentioned in OP.. I want to be able to tap into a gnus
> session running on the remote...You can't do that with tramp [...]

> Various other aggravations too.

Have you thought of tunneling the emacs client <--> server connection
through SSH?

Not tried yet, and I'm not sure whether there is'nt any better way --
(gurus invited to chime-in ;-) but that is a rough sketch of how I would
proceed:

  (1) Start Emacs server on your server machine, tell it to listen on TCP:
        emacs --daemon --eval '(setq server-use-tcp t)'
      (of course, typically you wouldn't use --eval in the command line,
      but rather put (setq ...) into some suitable startup file)
      Now the Emacs daemon is running and accepting connections via tcp.
      Maybe you can access it directly from your local network. If
      security is enough, you might skip step (3).

  (2) Transfer the file ~/.emacs.d/server/server to your client machine.
      It contains (among other things) a cookie which the client has to
      present to the server to appease the dogs at its entrance.

  (3) Among those "other things" there is a server address and port
      number. With some shell magic, create a shell command along the
      lines of 
        ssh -Llocalhost:<localport>:localhost:<emacsport> <youruser@yourserver>
      where you choose <localport> and extract <emacsport> from the file
      in (2) above
      Note that this step is only strictly necessary if you don't want
      to have your Emacs server listening in your home net (you'll have
      to dissuade it from doing so by some other means, though).

  (4) Give your client in the client machine the server cookie from (2).
      If you have done (3) and if <localport> and <emacsport> differ,
      you might have to edit the cookie file:
        emacsclient --server-file <the cookie from (2), edited if necessary>

Of course, if you are more fluent in elisp, you might substitute the
shell magic above with sufficient elisp magic. It's just more magic.

  (5) Let us know whether that works ;-)

Regards
- -- tomás

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