#! /bin/sh
### BEGIN INIT INFO
# Provides:          iodined
# Required-Start:    $remote_fs $network $syslog
# Required-Stop:     $remote_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: initscript for iodined
# Description:       initscript for iodined
### END INIT INFO

# Author: gregor herrmann <gregor+debian@comodo.priv.at>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="IP over DNS tunneling server"
NAME=iodined
DAEMON=/usr/sbin/$NAME
DEFAULT=iodine
DAEMON_ARGS=""
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
CHROOTDIR=/var/run/iodine

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

# Get config
get_config() {
	[ -r /etc/default/$DEFAULT ] && . /etc/default/$DEFAULT
	if [ "$START_IODINED" != "true" ] ; then
		[ "$VERBOSE" != no ] && log_progress_msg "- automatic start disabled" && log_end_msg 0
		exit 0
	else
		if [ -n "$IODINED_ARGS" ] && [ -n "$IODINED_PASSWORD" ] ; then
			DAEMON_ARGS="-u iodine -t $CHROOTDIR $IODINED_ARGS"
		else
			[ "$VERBOSE" != no ] && log_warning_msg "$NAME is not fully configured. Change this in /etc/default/$DEFAULT or run dpkg-reconfigure $DEFAULT."
			exit 0
		fi
	fi
}

# chroot dir
check_chrootdir() {
	if [ -d "$CHROOTDIR" ] || mkdir -p "$CHROOTDIR" ; then
		return 0
	else
		[ "$VERBOSE" != no ] && log_failure_msg "$CHROOTDIR does not exist and can't be created."
		exit 0
	fi
}	

#
# Function that starts the daemon/service
#
do_start()
{
	# populate $DAEMON_ARGS
	get_config
	# check CHROOTDIR
	check_chrootdir
	# 
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	start-stop-daemon --start --quiet --exec $DAEMON --test > /dev/null \
		|| return 1
	start-stop-daemon --start --quiet --exec $DAEMON -- $DAEMON_ARGS -P "$IODINED_PASSWORD" \
		|| return 2
	# Add code here, if necessary, that waits for the process to be ready
	# to handle requests from services started subsequently which depend
	# on this one.  As a last resort, sleep for some time.
}

#
# Function that stops the daemon/service
#
do_stop()
{
	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	start-stop-daemon --stop --quiet --retry=TERM/5/KILL/5 --exec $DAEMON
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --quiet --oknodo --retry=0/5/KILL/5 --exec $DAEMON
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return "$RETVAL"
}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
	;;
  restart|force-reload)
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
	  	# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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