net-dns/dnsmasq/files/dnsmasq.logrotate

/var/log/dnsmasq.log {
	create 640 dnsmasq root
	notifempty
	missingok
	postrotate
		test -r /var/run/dnsmasq.pid && kill -USR2 "$(head -n1 /var/run/dnsmasq.pid)"
	endscript
}