[Unit]
Description=Write boot and shutdown times into wtmpdb
Documentation=man:wtmpdb(8)
DefaultDependencies=no
RequiresMountsFor=/var/lib/wtmpdb
Conflicts=shutdown.target
After=systemd-remount-fs.service systemd-tmpfiles-setup.service
Before=sysinit.target shutdown.target

[Service]
Type=oneshot
ExecStart=/usr/bin/wtmpdb boot
ExecStop=/usr/bin/wtmpdb shutdown
RemainAfterExit=true

[Install]
WantedBy=default.target