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From: Tim Cross <theophilusx@gmail.com>
To: emacs-orgmode@gnu.org
Subject: Re: Specifying shells for remote ob-shell sessions?
Date: Fri, 25 Jun 2021 15:45:57 +1000	[thread overview]
Message-ID: <87k0mi31y8.fsf@gmail.com> (raw)
In-Reply-To: <3D86861D-E962-4FDB-B520-374C883C9F1E@block-party.net>

David Dynerman <emperordali@block-party.net> writes:

> Dear Org Mode Friends,
> I’m having some trouble getting the shell I want to run on remote hosts in
> session ob-shell blocks - it seems that no matter what shell I specify, session
> blocks will always run /bin/sh. I’m not sure if this is an org or tramp
> configuration issue on my end, or a bug in org.
> I’m pasting a snippet that reproduces the behavior in emacs -Q below. Does
> anyone have an inkling if this is a bug, or, alternatively, suggestions for how
> I can run remote ob-shell sessions with the shell of my choice?
> Thank you,
> David
> #+BEGIN_SRC emacs-lisp                                                                                          
>   (require 'ob-shell)                                                                                           
>   (emacs-version)                                                                                               
> #+END_SRC                                                                                                       
> : GNU Emacs 27.2 (build 1, x86_64-apple-darwin17.7.0, Carbon Version 158 AppKit 1561.6)                         
> :  of 2021-05-20                                                                                                
> #+BEGIN_SRC emacs-lisp                                                                                          
>   (org-version)                                                                                                 
> #+END_SRC                                                                                                       
> : 9.4.4                                                                                                         
> #+BEGIN_SRC zsh :dir /ssh:remote-host:/home/ubuntu                                                       
>     echo $0
> #+END_SRC                                                                                                       
> : zsh                                                                                                           
> #+BEGIN_SRC zsh :dir /ssh:remote-host:/home/ubuntu :session foobar                                       
> echo $0
> #+END_SRC                                                                                                       
> |           |
> | $ /bin/sh |

This is just some wild guess work, so may be completely wrong ....

I don't think it is a bug. The ob-shell library doesn't really know
anything about remote - the fact you can execute things remotely is just
part of the underlying Emacs tramp support.

As far as I know, the shell you get in the remote login is determined by
the remote host i.e. in the /etc/passwd file of the remote user account
(for login shells) and /bin/sh if ssh is just being called to execute a
command. In your case, because your calling echo $0 it is executed with

 I would start with tramp and try to configure it to execute commands
 using zsh. The ob-shell library isn't really aware of 'remote' - it is
 just calling tramp based on the path you provide, which is why I think
 tramp is a good place to start. If this cannot be easily done, look at the ssh manual and
 see if you can do this via a ~/.ssh/rc file on the remote host.

If you cannot find a way to configure tramp, perhaps try working out how
to just execute commands over ssh in a specific shell, like zsh. I
suspect once you work out how to do this with plain ssh, you may see a
way to configure tramp to do the same.

A final solution would be to just add a call to zsh in your source block
before the rest of what you want to run. 

Tim Cross

  reply	other threads:[~2021-06-25  6:15 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-24 23:15 Specifying shells for remote ob-shell sessions? David Dynerman
2021-06-25  5:45 ` Tim Cross [this message]
2021-06-25  7:18 ` Robert Pluim

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