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b538cdd5a9
This is detailed in: https://bugzilla.redhat.com/show_bug.cgi?id=688957 Since radvd is executed by daemonizing it, the attempt to exec the radvd binary doesn't happen until after libvirtd has already received an exit code from the intermediate forked process, so no error is detected or logged by __virExec(). We can't require radvd as a prerequisite for the libvirt package (many installations don't use IPv6, so they don't need it), so instead we add in a check to verify there is an executable radvd binary prior to trying to exec it.