#!/bin/sh
### BEGIN INIT INFO
# Provides:          kamailio-proxy
# Required-Start:    $syslog $network $local_fs $time mysql $remote_fs
# Required-Stop:     $syslog $network $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start the Kamailio SIP proxy server
# Description:       Start the Kamailio SIP proxy server
### END INIT INFO

TYPE=proxy
PATH=/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/kamailio
NAME=kamailio
DESC=kamailio-$TYPE
HOMEDIR=/var/run/kamailio
PIDFILE=$HOMEDIR/$NAME.$TYPE.pid
DEFAULTS=/etc/default/kamailio.$TYPE
CFGFILE=/etc/kamailio/$TYPE/kamailio.cfg
RUN_KAMAILIO=no

# Do not start kamailio if fork=no is set in the config file
# otherwise the boot process will just stop
check_fork ()
{
    if grep -q "^[[:space:]]*fork[[:space:]]*=[[:space:]]*no.*" $CFGFILE; then
	echo "Not starting $DESC: fork=no specified in config file; run /etc/init.d/kamailio debug instead"
	exit 1
    fi
}

check_kamailio_config ()
{
	# Check if kamailio configuration is valid before starting the server
	set +e
	out=$($DAEMON $OPTIONS -c 2>&1 > /dev/null)
	retcode=$?
	set -e
	if [ "$retcode" != '0' ]; then
	    echo "Not executing command for $DESC: invalid configuration file!"
	    echo -e "\n$out\n"
	    exit 1
	fi
}

check_homedir ()
{
    # Create HOMEDIR directory in case it doesn't exist
    if [ ! -d $HOMEDIR ]; then
        mkdir $HOMEDIR
    fi

    # Set the appropiate owner and group
    chown ${USER}:${GROUP} $HOMEDIR
}


create_radius_seqfile ()
{
    # Create a radius sequence file to be used by the radius client if
    # radius accounting is enabled. This is needed to avoid any issue
    # with the file not being writable if kamailio first starts as user
    # root because DUMP_CORE is enabled and creates this file as user
    # root and then later it switches back to user kamailio and cannot
    # write to the file. If the file exists before kamailio starts, it
    # won't change it's ownership and will be writable for both root
    # and kamailio, no matter what options are chosen at install time
    RADIUS_SEQ_FILE=$HOMEDIR/kamailio_radius.seq

    if [ ! -f $RADIUS_SEQ_FILE ]; then
        touch $RADIUS_SEQ_FILE
    fi

    chown ${USER}:${GROUP} $RADIUS_SEQ_FILE
    chmod 660 $RADIUS_SEQ_FILE
}


if [ ! -f $DAEMON ]; then
  echo "No $DESC daemon at $DAEMON."
  case "$1" in
  status)
    # LSB - 4: program or service status is unknown.
    exit 4
    ;;
  *)
    # LSB - 5: program is not installed.
    exit 5
    ;;
  esac
fi


# Load startup options if available
if [ -f $DEFAULTS ]; then
   . $DEFAULTS || true
fi


if [ "$RUN_KAMAILIO" != "yes" ]; then
    echo "$DESC not yet configured. Edit /etc/default/kamailio.$TYPE first."
    exit 0
fi


set -e


test -z "$SHM_MEMORY" && SHM_MEMORY=64
test -z "$PKG_MEMORY" && PKG_MEMORY=4
SHM_MEMORY=$((`echo $SHM_MEMORY | sed -e 's/[^0-9]//g'`))
PKG_MEMORY=$((`echo $PKG_MEMORY | sed -e 's/[^0-9]//g'`))
[ $SHM_MEMORY -le 0 ] && SHM_MEMORY=64
[ $PKG_MEMORY -le 0 ] && PKG_MEMORY=4
[ -z "$USER" ]  && USER=kamailio
[ -z "$GROUP" ] && GROUP=kamailio


if test "$DUMP_CORE" = "yes" ; then
    # set proper ulimit
    ulimit -c unlimited
    
    # directory for the core dump files
    # COREDIR=/home/corefiles
    # [ -d $COREDIR ] || mkdir $COREDIR
    # chmod 777 $COREDIR
    # echo "$COREDIR/core.$TYPE.%e.sig%s.%p" > /proc/sys/kernel/core_pattern
fi


if [ "$SSD_SUID" != "yes" ]; then
  OPTIONS="-f $CFGFILE -P $PIDFILE -m $SHM_MEMORY -M $PKG_MEMORY -u $USER -g $GROUP"
  SSDOPTS=""
else
  OPTIONS="-f $CFGFILE -P $PIDFILE -m $SHM_MEMORY -M $PKG_MEMORY"
  SSDOPTS="--chuid $USER:$GROUP"
fi


start_kamailio_daemon ()
{
  start-stop-daemon --start --quiet --pidfile $PIDFILE $SSDOPTS \
    --exec $DAEMON -- $OPTIONS
  res=$?

  echo -n "$NAME "
  if [ $res -eq 0 ] ; then
    echo "started."
    exit 0
  else
    if [ ! -r "$PIDFILE" ]; then
      echo "error, failed to start."
      exit 1
    elif read pid < "$PIDFILE" && ps -p "$pid" > /dev/null 2>&1; then
      echo "already running."
      exit 0
    else
      echo "error, failed to start ($PIDFILE exists)."
      exit 1
    fi
  fi
}


case "$1" in
  start|debug)
	check_kamailio_config
	check_homedir
	create_radius_seqfile

	if [ "$1" != "debug" ]; then
	    check_fork
	fi

	echo "Starting $DESC using $CFGFILE: "
	set +e
	start_kamailio_daemon
	;;

  stop)
	check_kamailio_config
	echo "Stopping $DESC:"
	start-stop-daemon --oknodo --stop --quiet --pidfile $PIDFILE \
	  --exec $DAEMON
	echo -n "$NAME "
	if [ $? -eq 0 ] ; then
	  echo "stopped."
	  exit 0
	else
	  echo "failed to stop."
	  exit 1
	fi
	;;

  restart|force-reload)
	check_kamailio_config
	check_homedir
	create_radius_seqfile

	echo "Restarting $DESC:"
	set +e
	start-stop-daemon --oknodo --stop --quiet --pidfile $PIDFILE --retry=5 \
	  --exec $DAEMON
	if [ $? -ne 0 ] ; then
	  echo "$NAME failed to stop."
	  exit 1
	fi

	start_kamailio_daemon
	;;

  status)
	echo -n "Status of $DESC: $NAME "
	if [ ! -r "$PIDFILE" ]; then
	  echo "is not running."
	  exit 3
	fi
	if read pid < "$PIDFILE" && ps -p "$pid" > /dev/null 2>&1; then
	  echo "is running."
	  exit 0
	else
	  echo "is not running but $PIDFILE exists."
	  exit 1
	fi
	;;

  *)
	N=/etc/init.d/$NAME
	echo "Usage: $N {start|stop|restart|force-reload|debug|status}" >&2
	exit 1
	;;
esac

exit 0