[Debian-on-mobile-maintainers] Bug#1014393: osk-sdl: unistalling osk-sdl leaves crypttab dirty causing failure in asking for the password

[Arnaud Ferraris]

Hi,

Le 05/07/2022 à 14:35, undef a écrit :
> Hi,
> 
> Thanks for the bug report.
> 
>> After removing osk-sdl, the crypttab file still contains the option 
>> keyscript=..../osk-sdl-keyscript.
>> That is an error that prevents the booting process to ask for the 
>> decrypting password.
>> Only after removing that option, I'm asked again for the password 
>> (which I can enter using a physical keyboard).
> 
> 
> I'm not sure this one is osk-sdl's responsibility. Installing osk-sdl 
> adds that keyscript to disk, but does not modify the crypttab. As far as 
> I know, this type of configuration is done by the installer for both 
> Debian and Mobian 
> (https://gitlab.com/mobian1/calamares-settings-mobian/-/blob/mobian-installer/scripts/calamares-install-bootloader 
> for example in Mobian) or the user.
> 
> 
> I'm not sure I'd want to write a regex that modifies the crypttab 
> successfully on all systems, especially when osk-sdl doesn't "own" that 
> file. I'd appreciate some advice if there is a proper way to do this 
> kind of thing.

My take on that would be a simple sed command in osk-sdl's postrm: 
although the package doesn't "own" the file, having a wrong/non-working 
keyscript parameter can definitely cause issue.

osk-sdl should therefore ensure its removal doesn't break anything, and 
a command similar to this one should work:

sed -i -e 's/,\?keyscript=.*osk-sdl-keyscript//g' <crypttab>

Cheers,
Arnaud

> 
> 
> 
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