[Unit]
Description=Qubes check for VM updates and notify dom0
ConditionPathExists=/var/run/qubes-service/qubes-update-check

[Service]
Type=oneshot
ExecStart=/usr/lib/qubes/qrexec-client-vm dom0 qubes.NotifyUpdates /bin/sh -c 'yum -q check-update >/dev/null; [ $? -eq 100 ] && echo 1 || echo 0'