#!/bin/sh
# 
# runlevel script of the cryptobox package
#
# Copyright (c) 02006, senselab
#
# see LICENSE file in this package for details
#

### BEGIN INIT INFO
# Provides:          cryptobox-server
# Required-Start:    $network $local_fs $remote_fs
# Required-Stop:     $network $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: start CryptoBox webserver
### END INIT INFO

# include some useful functions to unify our output format
. /lib/lsb/init-functions

# read the default setting file, if it exists
[ -r /etc/default/cryptobox-server ] && . /etc/default/cryptobox-server

# set default values (if not defined in /etc/default/cryptobox-server)
NO_START=${NO_START:-0}
RUNAS=${RUNAS:-cryptobox}
PORT=${PORT:-8080}
HOST=${HOST:-}
LOGFILE=/var/log/cryptobox-server/webserver.log
SERVER_OPTS=${SERVER_OPTS:-}
CONF_FILE=/etc/cryptobox-server/cryptobox.conf

DAEMON=/usr/sbin/CryptoBoxWebserver
# default install location is /usr/bin/ - debian installation requires /usr/sbin/
test -x "$DAEMON" || DAEMON=/usr/bin/CryptoBoxWebserver
PYTHON_EXEC=/usr/bin/python
PIDFILE=/var/run/cryptobox-server/webserver.pid
DESC="CryptoBox Daemon (webinterface)"
OPTIONS="-B --pidfile=$PIDFILE --config=$CONF_FILE --logfile=$LOGFILE --host=$HOST --port=$PORT --user=$RUNAS $SERVER_OPTS"

# quit if NO_START is 1 (see /etc/default/cryptobox-server)
[ "$NO_START" = "1" ] && log_daemon_msg "Not starting $DESC please edit /etc/default/cryptobox-server!" && exit 0

# check if the package is installed
test -e "$DAEMON" || exit 0


# this test is specific for ubuntu, which currently lacks python-clearsilver
# support for pythpn 2.6
# see https://bugs.launchpad.net/ubuntu/+source/clearsilver/+bug/386970
check_python_version() {
	MODULE_CHECK="import neo_cgi, neo_util, neo_cs"
	PYTHON_EXEC_25="/usr/bin/python2.5"
	PYTHON_EXEC_24="/usr/bin/python2.4"
	if "$PYTHON_EXEC" -c "$MODULE_CHECK" 2>/dev/null; then
		# everything is fine
		return 0
	else
		if which "$PYTHON_EXEC_25" >/dev/null; then
			if "$PYTHON_EXEC_25" -c "$MODULE_CHECK" 2>/dev/null; then
				PYTHON_EXEC="$PYTHON_EXEC_25"
				return 0
			 else
				log_daemon_msg "The python-clearsilver package is not installed."
				log_end_msg 1
				return 1
			 fi
		 fi
		if which "$PYTHON_EXEC_24" >/dev/null; then
			if "$PYTHON_EXEC_24" -c "$MODULE_CHECK" 2>/dev/null; then
				PYTHON_EXEC="$PYTHON_EXEC_24"
				return 0
			 else
				log_daemon_msg "The python-clearsilver package is not installed."
				log_end_msg 1
				return 1
			 fi
		 fi
		# no useable python version installed
		log_daemon_msg "Failed to use clearsilver with your current python version."
		log_daemon_msg "Please install python2.5 (aptitude install python2.5)."
		log_end_msg 1
	 fi
}


case "$1" in
	start )
		# check if the default python version supports clearsilver
		# change the used python interpreter if possible
		check_python_version || exit 1
		# create the directory of the pid file if necessary
		PIDDIR=$(dirname "$PIDFILE")
		if [ ! -d "$PIDDIR" ]
		  then	mkdir -p "$PIDDIR"
			# necessary: the cryptobox server needs the permission to remove the pid file
		  	chown $RUNAS:root "$PIDDIR"
			chmod 755 "$PIDDIR"
		 fi
		# create the directory of the pid file if necessary
		LOGDIR=$(dirname "$LOGFILE")
		if [ ! -d "$LOGDIR" ]
		  then	mkdir -p "$LOGDIR"
		  	chown $RUNAS:root "$LOGDIR"
			chmod 750 "$LOGDIR"
		 fi
		log_daemon_msg "Starting $DESC"
		if start-stop-daemon \
			--quiet --start --user $RUNAS --pidfile "$PIDFILE" \
			--startas "$PYTHON_EXEC" -- "$DAEMON" $OPTIONS
		  then	log_end_msg 0
		  else	log_end_msg 1
		 fi
		;;
	stop )
		log_daemon_msg "Stopping $DESC"
		# if there is no pid file for some reason, then we try to find the process
		if test ! -e "$PIDFILE"
		  then	if start-stop-daemon --quiet --stop --user "$RUNAS" --exec "$PYTHON_EXEC"
			  then	log_end_msg 0
			  else	log_end_msg 1
			 fi
		# there is a pid file - great!
		elif	start-stop-daemon --quiet --stop \
				--pidfile "$PIDFILE" \
				--user "$RUNAS"
		  then	test -e "$PIDFILE" && rm "$PIDFILE"
		  	log_end_msg 0
		  else	log_end_msg 1
		 fi
		;;
	reload | force-reload | restart )
		"$0" stop 
		sleep 3
		"$0" start
		;;
	status )
			echo -n "$DESC "
			if start-stop-daemon --stop --signal 0 --quiet \
					--pidfile "$PIDFILE" --user "$RUNAS"
			  then	echo "running"
			  	exit 0
			  else	if [ -e "$PIDFILE" ]
			  	  then	echo "failed"
				  	exit 1
				  else	echo "not running"
				    exit 0
				 fi
			 fi
		;;
	* )
		echo "Usage: $0 {start|stop|restart|force-reload|status}" >&2
		exit 1
		;;
 esac

exit 0