#!/bin/sh

DAEMON="dropbear"
PIDFILE="/var/run/$DAEMON.pid"
DROPBEAR_ARGS="-R -B -k -p 22 -K 300"

start() {
	# If /etc/dropbear is a symlink to /var/run/dropbear, and
	#   - the filesystem is RO (i.e. we can not rm the symlink),
	#     create the directory pointed to by the symlink.
	#   - the filesystem is RW (i.e. we can rm the symlink),
	#     replace the symlink with an actual directory
	if [ -L /etc/dropbear -a "$(readlink /etc/dropbear)" = "/var/run/dropbear" ]; then
		if rm -f /etc/dropbear >/dev/null 2>&1; then
			mkdir -p /etc/dropbear
		else
			echo "No persistent location to store SSH host keys. New keys will be"
			echo "generated at each boot. Are you sure this is what you want to do?"
			mkdir -p "$(readlink /etc/dropbear)"
		fi
	fi

	printf "Starting $DAEMON: "
	umask 077

	start-stop-daemon -S -q -p "$PIDFILE" -x "/usr/sbin/$DAEMON" -- $DROPBEAR_ARGS
	if [ $? = 0 ]; then
		echo "OK"
	else
		echo "FAIL"
	fi
}

stop() {
	printf "Stopping $DAEMON: "
	start-stop-daemon -K -q -p "$PIDFILE"
	if [ $? = 0 ]; then
		echo "OK"
	else
		echo "FAIL"
	fi
}

case "$1" in
	start|stop)
		"$1"
		;;

	restart|reload)
		stop
		sleep 1
		start
		;;

	*)
		echo "Usage: $0 {start|stop|restart|reload}"
		exit 1
		;;
esac