[Unit]
Description=Terraria server %i
After=network.target

[Service]
User=terraria
ExecStart=/usr/bin/screen -DmS terraria-%i /usr/bin/terraria-server -config /etc/terraria-server/%i.conf
ExecStop=/usr/bin/screen -p 0 -S terraria-%i -X eval 'stuff "say Server shutting down. Saving world."\\015'
ExecStop=/usr/bin/screen -p 0 -S terraria-%i -X eval 'stuff "exit"\\015'
ExecStop=/usr/bin/sh -c 'while screen -ls | grep 'terraria-%i' >/dev/null; do sleep 0.1; done'

[Install]
WantedBy=multi-user.target