Allow running of arbitrary commands before and after authentication

[dexterlb]

Let the user execute any command just before and after authenticating.
This allows for things like printing a different prompt each time, showing something just after unlocking,
etc - within physlock's VT.

As a bonus, add an option to not do any authentication at all - just execute the commands while having locked the screen. My personal favourite is running sl with no way whatsoever to interrupt it :)

[googleson78]

You should add the new flags to print_usage().

[jluttine]

Are the commands run as the user whose password is asked or as the user who launched physlock (typically root, I suppose)? In my opinion, it would be nice if those were run as the user whose password is asked. What do you think?

[jluttine]

@dexterlb Thanks a lot for the changes, they are very helpful to me! Now, running the following command works and the before/after commands are executed as the normal user:

PATH="" /path/to/bin/sudo /path/to/bin/physlock -b '/path/to/bin/echo "Hello, `/path/to/bin/whoami`"' -a '/path/to/bin/echo "Bye, `/path/to/bin/whoami`!" && /path/to/bin/sleep 2'

[travankor]

It would be nice to have an option to execute a command after inactivity timeout. For example, go to sleep if physlock is called but no activity happens after a certain amount of time.

[Barbaross93]

Hi @dexterlb! I packaged your fork to the AUR. Would you be willing to do a rebase on your fork?

[dexterlb]

Hi @dexterlb! I packaged your fork to the AUR. Would you be willing to do a rebase on your fork?

It has been done!