Andrew Berry Andrew Berry - 1 year ago 47
Linux Question

force an uninterruptable bash script to run on login SSH

I am making a text based RPG, and would like to run a bash script upon login of a certain user (The script will basically be lua then once the file is done, logout) but I don't want the users to access the shell, and I want it to log out as soon as it finishes.

I am at loss as to how to make the script so ctrl+c will not stop it and give users shell access..

I've googled, but I must not be using the right phrase...

If anyone could help me, that would be greatly appreciated.

They will be logging in over SSH


You could try setting the script as the default shell of the user:

chsh -s /usr/local/the_script theuser

The script will then be run in place of the default shell and the user will be logged out the moment the script ends.

You will need to add the script to /etc/shells for it to be accepted as valid login shell.

Disclaimer: There may be other security implications to this approach, so do take this with a pinch of salt and look further into it before deploying on a production system. For example, you may want to run your script in restricted mode if applicable.