multiple emacs servers

multiple emacs servers

[David L]

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The emacs manual says:

You can run multiple Emacs servers on the same machine by giving
each one a unique "server name", using the variable `server-name'.  For
example, `M-x set-variable <RET> server-name <RET> foo <RET>' sets the
server name to `foo'.

I can't get this to work.  Am I doing something wrong or is this
documentation obsolete?

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Re: multiple emacs servers

[Juanma Barranquero]

On 10/18/07, David L <idht4n@gmail.com> wrote:

> The emacs manual says:
>
> You can run multiple Emacs servers on the same machine by giving
> each one a unique "server name", using the variable `server-name'.  For
> example, `M-x set-variable <RET> server-name <RET> foo <RET>' sets the
> server name to `foo'.
>
> I can't get this to work.  Am I doing something wrong or is this
> documentation obsolete?

What are you doing, exactly?

I think it's a misunderstanding. You cannot have two server processes
in the same instance of Emacs (there's only one `server-process'
variable, and `server-start' kills the previous process before
starting one anew), but certainly you can start several Emacsen, each
one with a different value of server-name, and have several Emacs
servers. I do it daily.

  emacs -q --eval '(progn (setq server-name "server1") (server-start))'
  emacs -q --eval '(progn (setq server-name "server2") (server-start))'

and you can use:

  emacsclient --server-file=server1 my-file
  emacsclient --server-file=server2 my-other-file

             Juanma

Re: multiple emacs servers

[David L]

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On 10/18/07, Juanma Barranquero <lekktu@gmail.com> wrote:
>
> On 10/18/07, David L <idht4n@gmail.com> wrote:
>
> > The emacs manual says:
> >
> > You can run multiple Emacs servers on the same machine by giving
> > each one a unique "server name", using the variable `server-name'.  For
> > example, `M-x set-variable <RET> server-name <RET> foo <RET>' sets the
> > server name to `foo'.
> >
> > I can't get this to work.  Am I doing something wrong or is this
> > documentation obsolete?
>
> What are you doing, exactly?


I'm trying to use  M-x set-variable from an open emacs session to
set the "server-name" variable.  But the only variable that emacs
will let me set that starts with "server" is "server-mode".  I can't
even describe-variable "server-name" until after the server is
started and I still can't set-variable server-name even after it is
started.
<snip>

>
>   emacs -q --eval '(progn (setq server-name "server1") (server-start))'
>   emacs -q --eval '(progn (setq server-name "server2") (server-start))'
>
> and you can use:
>
>   emacsclient --server-file=server1 my-file
>   emacsclient --server-file=server2 my-other-file

This works, thanks!  But I don't think the procedure in the
documentation works.?

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Re: multiple emacs servers

[Juanma Barranquero]

On 10/18/07, David L <idht4n@gmail.com> wrote:

> I'm trying to use  M-x set-variable from an open emacs session to
> set the "server-name" variable.  But the only variable that emacs
> will let me set that starts with "server" is "server-mode".  I can't
> even describe-variable "server-name" until after the server is
> started and I still can't set-variable server-name even after it is
> started.

Yes. `server-name' is not autoloaded, so it is not defined until you
load server.el; if you do "M-x load-library server [RET]" you'll be
able to describe-variable `server-name' before starting the server,
but it won't be useful, as server-name has no documentation string.
That's also the reason you can not use M-x set-variable with it
(variables have to be specially marked as user options to be setable
with set-variable).

I suggest you locally patch your server.el, changing this line:

(defvar server-name "server")

to this

(defcustom server-name "server"
  "Name of the server process."
  :group 'server
  :type 'string)

recompile server.el, and try again.

> But I don't think the procedure in the
> documentation works.?

Well, certainly it should be possible to change the server name before
starting the server, yes.

             Juanma