[maemo-developers] Check is app installed from another app

[From: Tim Teulings]

Hallo!

>> I'm just wondering what's the best way to check is an application installed
>> from another application?
>
> perhaps doing a system("dpkg -l mypackage") and checking the return
> value is good enough?

lib-apt-pkg offers programatic access to the local repository. However 
it needs some setup and my be thus a little to big" solution.

-- 
Gruß...
        Tim