gentoo-overlay/net-analyzer/arpwatch/files/arpwatch.service

[Unit]
Description=Ethernet monitoring program that tracks net/IP pairings
Documentation=man:arpwatch(8)
Conflicts=
After=systemd-networkd.service

PIDFILE=/run/arpwatch.pid

[Service]
Type=forking
ExecStartPre=/bin/rm -f /run/arpwatch.pid
ExecStart=/usr/sbin/arpwatch $IFACES $PIDFILE $RUNUSER $OPTIONS $DATA
Restart=on-abort

[Install]
Alias=arpwatchd.service