Comment 5 for bug 684088

Description of problem:

NWFilter code does not discover if required tools are installed after starting the daemon (nor if they are removed).

Version-Release number of selected component (if applicable):

0.8.3 at least.

How reproducible:

Every time.

Steps to Reproduce:
1. Uninstall (if already installed) ebtables.
2. Start libvirtd
3. Try to start a guest that uses nwfilters.
4. Watch it fail.
5. Install ebtables and repeat steps 3 and 4.

Actual results:

It fails to notice that I've now installed ebtables (and gawk and iptables).

Expected results:

It should notice that these tools are now available.

Additional info:

The converse is also true: If they tools are present when libvirtd starts, but are removed later, things will fail.