freebsd-skq/etc/rc.d/initrandom

#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: initrandom
# REQUIRE: initdiskless
# BEFORE: disks
# KEYWORD: FreeBSD nojail

. /etc/rc.subr

name="initrandom"
start_cmd="initrandom_start"
stop_cmd=":"

feed_dev_random()
{
	if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
		cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null
	fi
}

initrandom_start()
{
	echo -n 'Entropy harvesting:'

	if checkyesno harvest_interrupt; then
		if [ -w /dev/random ]; then
			${SYSCTL_W} kern.random.sys.harvest.interrupt=1 >/dev/null
			echo -n ' interrupts'
		fi
	fi

	if checkyesno harvest_ethernet; then
		if [ -w /dev/random ]; then
			${SYSCTL_W} kern.random.sys.harvest.ethernet=1 >/dev/null
			echo -n ' ethernet'
		fi
	fi

	if checkyesno harvest_p_to_p; then
		if [ -w /dev/random ]; then
		${SYSCTL_W} kern.random.sys.harvest.point_to_point=1 >/dev/null
			echo -n ' point_to_point'
		fi
	fi

	echo '.'

	# First pass at reseeding /dev/random.
	#
	case ${entropy_file} in
	[Nn][Oo] | '')
		;;
	*)
		if [ -w /dev/random ]; then
			feed_dev_random "${entropy_file}"
		fi
		;;
	esac

	# XXX temporary until we can get the entropy
	# harvesting rate up
	# Entropy below is not great,
	# but better than nothing.
	( ps -fauxww; sysctl -a; date; df -ib; dmesg; ps -fauxww; ) \
	    | dd of=/dev/random bs=8k 2>/dev/null
	cat /bin/ls | dd of=/dev/random bs=8k 2>/dev/null
}

load_rc_config random
run_rc_command "$1"