David Dynerman 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
>
>
>
> #+RESULTS:
> : 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
>
>
>
> #+RESULTS:
> : 9.4.4
>
>
> #+BEGIN_SRC zsh :dir /ssh:remote-host:/home/ubuntu
>
> echo $0
> #+END_SRC
>
>
>
> #+RESULTS:
> : zsh
>
>
> #+BEGIN_SRC zsh :dir /ssh:remote-host:/home/ubuntu :session foobar
>
> echo $0
> #+END_SRC
>
>
> #+RESULTS:
> | |
> | $ /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
/bin/sh
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
