[maemo-developers] invoking the application manager programatically in Qt

[From: ibrahim]

greetings;

I was hoping to add enable installing some features/add-ons/updates in 
the form of .deb packages (for example: font packages/ updates to my SW) 
from within my  Qt application. So, I used an approach similar to OTA 
installation. I add a '.install' file in some server, open the link to 
that install file inside my application using qwebkit's webview. and 
when the user clicks on the link to the '.install' file, the 
Hildon-application-manager gets invoked and my update package is installed.
but i faced the following problems:
first: the webkit component doesn't understand the association between 
the .install file and the required application to open it. the qwebview 
either displays the .install file as text in the browser or does nothing.

I can overcome this problem by delegating the webl inks and handling 
them on my own, ... when user clicks on the .install file's link, i can 
create a QHTtp object to download the file to any location (say /tmp)

but the real problem is : i have the .install file But i can't invoke 
the app manager to install the package with the file. Calling the 
command "hildon-aaplication-manager install_file.install " from system() 
or using a QProcess object from within the code  - OR EVEN from 
command-line as root -  returns the following:
in the console: the app manager requests a password (??? what password 
should i provide ???)
then the app manager starts and shows the following notification: 
"Operation Failed"
just like that.

is there's a way to invoke the app manager to install a package from my 
Qt code ???

any assistance is  higly appreciated
thanks in advance;