problems with some external org-mode shell links which make emacs stuck

[Gregor Zattler]

Dear Emacs users, I use org-mode's external links to
establish ssh portforwarding to several servers, like
so:

[[shell:ssh -N -F /etc/ssh/ssh_config -L localport:hostname:hostport -p port 
user@server& # comment1][comment2]]

If I do C-c  C-o (org-open-at-point) on such a link,
the ssh portforwarding command is executed
successfully, but:

1. I'm asked every time if I want to execute the
   command.  This is annoying, is there a possibility
   to stop this?

2. Emacs then shows "Executing ssh -N ..." in the echo
   area and while I still see the active cursor on the
   link I'm not able to move the point or switch
   between windows, till I hit C-g.  (In a terminal
   emulator under bash command returns successfully,
   it's exit code is 0.)

   The problem does not stem from the "# comment1"
   part, since the same does not happen with this link:
   [[shell:/usr/bin/echo hund & # hund][hund]]

   Any idea what's happening here?

   If I instead use an external link of type elisp,
   like so:

   [[elisp:(shell-command "ssh -N -F /etc/ssh/ssh_config -L 30001:xxxxxxxx:8006 
  -p 2220 xxxx@xxxxxxxxxx & # comment1")][comment2]]

   Problems are the same.  I also experimented with
   start-process, but with even less success.


The value of sh-shell-file is "/bin/bash".  This is on Debian/Bookworm.


Emacs  : GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, cairo version 1.16.0)
 of 2024-01-25
Package: Org mode version 9.7-pre (release_9.6.17-1091-gea5290 @ 
/home/grfz/src/org-mode/lisp/)

But this also happens with emacs 28.2 and -Q.

Thanks for pointers, Gregor