Hi,
Thank you for the fast answer.
I would prefer to create a group and a user. We won't give the user a password
which must be set by the user in order to login with that user.
If someone prefers, they can create their own users and add them to the group.
A system group should be created with groupadd of course be checked if that
group existed before.
I will send a new patch tomorrow, which the checks if the user and the group are existent and add the group extra.
I will further send 2 patches which change the default qemu user to nobody when this 3 patch are merged libvirt could from my point of view pushed to the testing repo.