Dropbear init script for SystemV

dropbear

#!/bin/sh
### BEGIN INIT INFO
# Provides:          dropbear
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Lightweight SSH server
# Description:       Init script for drobpear SSH server.  Edit
#                    /etc/default/dropbear to configure the server.
### END INIT INFO
#
# Do not configure this file. Edit /etc/default/dropbear instead!
#

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/dropbear
NAME=dropbear
DESC="Dropbear SSH server"
DEFAULTCFG=/etc/default/dropbear

DROPBEAR_PORT=22
DROPBEAR_EXTRA_ARGS=
NO_START=0

set -e

. /lib/lsb/init-functions

cancel() { echo "$1" >&2; exit 0; };
test ! -r $DEFAULTCFG || . $DEFAULTCFG
test -x "$DAEMON" || cancel "$DAEMON does not exist or is not executable."
test ! -x /usr/sbin/update-service || ! update-service --check dropbear ||
  cancel 'The dropbear service is controlled through runit, use the sv(8) program'

[ ! "$DROPBEAR_BANNER" ] || DROPBEAR_EXTRA_ARGS="$DROPBEAR_EXTRA_ARGS -b $DROPBEAR_BANNER"
[ ! -f "$DROPBEAR_RSAKEY" ]   || DROPBEAR_EXTRA_ARGS="$DROPBEAR_EXTRA_ARGS -r $DROPBEAR_RSAKEY"
[ ! -f "$DROPBEAR_DSSKEY" ]   || DROPBEAR_EXTRA_ARGS="$DROPBEAR_EXTRA_ARGS -r $DROPBEAR_DSSKEY"
[ ! -f "$DROPBEAR_ECDSAKEY" ] || DROPBEAR_EXTRA_ARGS="$DROPBEAR_EXTRA_ARGS -r $DROPBEAR_ECDSAKEY"
test -n "$DROPBEAR_RECEIVE_WINDOW" || \
  DROPBEAR_RECEIVE_WINDOW="65536"

case "$1" in
  start)
	test "$NO_START" = "0" ||
	cancel "Starting $DESC: [abort] NO_START is not set to zero in $DEFAULTCFG"

	echo -n "Starting $DESC: "
	start-stop-daemon --start --quiet --pidfile /var/run/"$NAME".pid \
	  --exec "$DAEMON" -- -p "$DROPBEAR_PORT" -W "$DROPBEAR_RECEIVE_WINDOW" $DROPBEAR_EXTRA_ARGS
	echo "$NAME."
	;;
  stop)
	echo -n "Stopping $DESC: "
	start-stop-daemon --stop --quiet --oknodo --pidfile /var/run/"$NAME".pid
	echo "$NAME."
	;;
  restart|force-reload)
	test "$NO_START" = "0" ||
	cancel "Restarting $DESC: [abort] NO_START is not set to zero in $DEFAULTCFG"

	echo -n "Restarting $DESC: "
	start-stop-daemon --stop --quiet --oknodo --pidfile /var/run/"$NAME".pid
	sleep 1
	start-stop-daemon --start --quiet --pidfile /var/run/"$NAME".pid \
	  --exec "$DAEMON" -- $DROPBEAR_KEYS -p "$DROPBEAR_PORT" -W "$DROPBEAR_RECEIVE_WINDOW" $DROPBEAR_EXTRA_ARGS
	echo "$NAME."
	;;
  status)
		status_of_proc -p /var/run/"$NAME".pid $DAEMON $NAME && exit 0 || exit $?
	;;
  *)
	N=/etc/init.d/$NAME
	echo "Usage: $N {start|stop|status|restart|force-reload}" >&2
	exit 1
	;;
esac

exit 0