core-agent-linux/vm-systemd/qubes-updates-proxy.service

[Unit]
Description=Qubes updates proxy (tinyproxy)
ConditionPathExists=|/var/run/qubes-service/qubes-yum-proxy
ConditionPathExists=|/var/run/qubes-service/qubes-updates-proxy
After=iptables.service

[Service]
ExecStartPre=/usr/bin/install -d --owner tinyproxy --group tinyproxy /var/run/tinyproxy
ExecStartPre=/usr/lib/qubes/iptables-updates-proxy start
ExecStart=/usr/sbin/tinyproxy -d -c /etc/tinyproxy/tinyproxy-updates.conf
ExecStopPost=/usr/lib/qubes/iptables-updates-proxy stop
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target