Yggdrasil init script for SystemV

yggdrasil

#!/bin/sh

### BEGIN INIT INFO
# Provides:          yggdrasil
# Required-Start:    $local_fs
# Required-Stop:
# Should-Start:      $network $portmap
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Overlay network
# Description:       Overlay network
### END INIT INFO

. /lib/lsb/init-functions

[ -f /etc/default/rcS ] && . /etc/default/rcS
PATH=/bin:/usr/bin:/sbin:/usr/sbin
DAEMON=/usr/bin/yggdrasil
CONFIG_FILE="/etc/yggdrasil.conf"
DAEMON_OPTS="-useconffile $CONFIG_FILE" 
NAME=yggdrasil
DESC="overlay network"

CONFFILE="/etc/yggdrasil.conf"

gen_conf() {
	$DAEMON -genconf $CONFIG_FILE
	return $?
}

probe_tun() {
	modprobe tun
	return $?
}

probe_ipv6() {
	modprobe ipv6
	return $?
}

pre_start() {
	if [ ! -f "$CONFFILE" ]; then
		log_daemon_msg 'Generating configuration file: '
		if gen_conf; then
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
	fi

	if [ -d /sys/module/ipv6/ ]; then
		log_daemon_msg 'Inserting ipv6 module: '
		if probe_ipv6; then
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
	fi

	if [ ! -e /dev/net/tun ]; then
		log_daemon_msg 'Inserting TUN module: '
		if probe_tun; then
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
	fi

	if [ "$(cat /sys/module/ipv6/parameters/disable)" != "0" ]; then
		echo "ipv6 is disabled"
		exit 1
	fi
}


test -x $DAEMON || exit 0

set -e

case "$1" in
  start)
	pre_start
	log_daemon_msg "Starting $DESC" "$NAME"
	start-stop-daemon --start --background --quiet \
		--pidfile /var/run/$NAME.pid --make-pidfile \
		--exec $DAEMON -- $DAEMON_OPTS
	log_end_msg $?
	;;
  stop)
	log_daemon_msg "Stopping $DESC" "$NAME"
	start-stop-daemon --stop --oknodo --quiet --pidfile /var/run/$NAME.pid \
		--retry 10 --exec $DAEMON
	log_end_msg $?
	;;
  force-reload)
	# check whether $DAEMON is running. If so, restart
	start-stop-daemon --stop --test --quiet --pidfile \
		/var/run/$NAME.pid --exec $DAEMON \
	&& $0 restart \
	|| exit 0
	;;
  restart)
	log_daemon_msg "Restarting $DESC" "$NAME"
	$0 stop
	$0 start
	;;
  status)
	if [ -s /var/run/$NAME.pid ]; then
            RUNNING=$(cat /var/run/$NAME.pid)
            if [ -d /proc/$RUNNING ]; then
                if [ $(readlink /proc/$RUNNING/exe) = $DAEMON ]; then
                    log_success_msg "$NAME is running"
                    exit 0
                fi
            fi

            # No such PID, or executables don't match
            log_failure_msg "$NAME is not running, but pidfile existed"
            rm /var/run/$NAME.pid
            exit 1
        else
            rm -f /var/run/$NAME.pid
            log_failure_msg "$NAME not running"
            exit 1
        fi
	;;
  *)
	N=/etc/init.d/$NAME
	log_failure_msg "Usage: $N {start|stop|restart|force-reload}"
	exit 1
	;;
esac