Accessing emacsclient environment variables.

Accessing emacsclient environment variables.

[Abutalib Aghayev]

Hi all,

On machine "foo", I start emacs as a server using "emacs --daemon" and
on machine "bar" I do remote editing by running "ssh -A foo emacsclient
-c".  The -A switch is to enable SSH Agent Forwarding.

Now, when I run shell in emacsclient (M-x shell), the shell does not
have SSH_AUTH_SOCKET properly set, which is normal, since emacs server
was started locally and M-x shell uses server's environment to launch a
shell.

However, emacsclient has the correct SSH_AUTH_SOCKET value in its
environment -- I can verify that by running "cat
/proc/pid-of-emacs-client/environ".

Is there a way of accessing emacsclient's environment variable or at
least its process id, so that I could set SSH_AUTH_SOCKET before
launching shell?  Better yet, is there a simpler way to solve this
problem?

Thanks.

Re: Accessing emacsclient environment variables.

[Suvayu Ali]

On Sun, Jul 06, 2014 at 02:39:36PM -0400, Abutalib Aghayev wrote:
> launching shell?  Better yet, is there a simpler way to solve this
> problem?

I would try to run emacsclient on the local machine and connect to the
emacs server over tramp.  See "How can I use TRAMP to connect to a
remote Emacs session?" in the tramp FAQ.  Note this requires the machine
running emacs server can resolve the address you are connecting from.
So if you are behind NAT or something similar, it will fail.

Hope this helps,

-- 
Suvayu

Open source is the future. It sets us free.

Re: Accessing emacsclient environment variables.

[Stefan Monnier]

> Is there a way of accessing emacsclient's environment variable or at
> least its process id, so that I could set SSH_AUTH_SOCKET before
> launching shell?

Yes, you can use (frame-parameter nil 'environment) to get
the environment.


        Stefan

Re: Accessing emacsclient environment variables.

[Abutalib Aghayev]

On Sun, Jul 06 2014 at 21:01 PM, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>> Is there a way of accessing emacsclient's environment variable or at
>> least its process id, so that I could set SSH_AUTH_SOCKET before
>> launching shell?
>
> Yes, you can use (frame-parameter nil 'environment) to get
> the environment.

Thanks, exactly what I was looking for!

Re: Accessing emacsclient environment variables.

[Abutalib Aghayev]

On Sun, Jul 06 2014 at 19:21 PM, Suvayu Ali <fatkasuvayu+linux@gmail.com> wrote:
> On Sun, Jul 06, 2014 at 02:39:36PM -0400, Abutalib Aghayev wrote:
>> launching shell?  Better yet, is there a simpler way to solve this
>> problem?
>
> I would try to run emacsclient on the local machine and connect to the
> emacs server over tramp.  See "How can I use TRAMP to connect to a
> remote Emacs session?" in the tramp FAQ.  Note this requires the machine
> running emacs server can resolve the address you are connecting from.
> So if you are behind NAT or something similar, it will fail.

I'm aware of TRAMP but I'm behind NAT, thanks for the suggestion though.

Re: Accessing emacsclient environment variables.

[Stefan Monnier]

> I'm aware of TRAMP but I'm behind NAT, thanks for the suggestion though.

BTW, I find that to access machines which are behind NATs, OpenVPN is
a wonderful tool.  Of course, it requires access to a "always ON and not
behind NAT" machine.


        Stefan