XCVMKit-OS/package/htpdate/htpdate.service

[Unit]
Description=htpdate daemon
After=network.target

[Service]
Type=forking
PIDFile=/run/htpdate.pid
Environment=HTPDATE_ARGS="-a -s -t https://www.google.com"
EnvironmentFile=-/etc/default/htpdate
ExecStart=/usr/sbin/htpdate -D -i /run/htpdate.pid $HTPDATE_ARGS

[Install]
WantedBy=multi-user.target