freebsd-ports/net-mgmt/wide-dhcp/pkg-req

#!/bin/sh
if [ "$2" != "INSTALL" ]; then
  exit 0
fi
if [ ! -c /dev/bpf1 ]; then
	echo "**********************************************************"
	echo "* This DHCP program need Berkeley packet filter (bpf)"
	echo "* To use DHCP, you need to rebuild your kernel with bpf"
	echo "* and make bpf devices in the /dev directory."
	echo "**********************************************************"
fi