#!/bin/bash
#
# Startup script for Kamailio
#
# chkconfig: 345 85 15
# description: Kamailio (OpenSER) - the Open Source SIP Server
#
# processname: kamailio
# pidfile: /var/run/kamailio.pid
# config: /etc/kamailio/kamailio.cfg
#
### BEGIN INIT INFO
# Provides: kamailio
# Required-Start: $local_fs $network
# Short-Description: Kamailio (OpenSER) - the Open Source SIP Server
# Description: Kamailio (former OpenSER) is an Open Source SIP Server released
#       under GPL, able to handle thousands of call setups per second.
### END INIT INFO

# Source function library.
. /etc/rc.d/init.d/functions

KAM=/usr/local/sbin/kamailio
KAMCFG=/usr/local/etc/kamailio/kamailio.cfg
PROG=kamailio
PID_FILE=/var/run/kamailio.pid
LOCK_FILE=/var/lock/subsys/kamailio
RETVAL=0
DEFAULTS=/etc/sysconfig/kamailio
RUN_KAMAILIO=yes


configure_mysql_connection()
{
    DB_PASSWORD=`cat /etc/m2/system.conf | grep dbsecret | awk '{print $3}'`
    DB_USERNAME=`cat /etc/m2/system.conf | grep dbuser | awk '{print $3}'`
    DB_NAME=`cat /etc/m2/system.conf | grep dbname | awk '{print $3}'`
    DB_HOST=`cat /etc/m2/system.conf | grep dbhost | awk '{print $3}'`

    sed -i "s|\"mysql:.*\"|\"mysql://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}/${DB_NAME}\"|g" /etc/kamailio/kamailio.cfg
}

# 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.*" $KAMCFG; 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
        out=$($KAM -c 2>&1 > /dev/null)
        retcode=$?
        if [ "$retcode" != '0' ]; then
            echo "Not starting $DESC: invalid configuration file!"
            echo -e "\n$out\n"
            exit 1
        fi
}


start() {
        configure_mysql_connection
        check_kamailio_config
        if [ "$1" != "debug" ]; then
            check_fork
        fi
        echo -n $"Starting $PROG: "
        daemon $KAM $OPTIONS >/dev/null 2>/dev/null
        RETVAL=$?
        [ $RETVAL = 0 ] && touch $LOCK_FILE && success
        echo
        return $RETVAL
}

stop() {
        echo -n $"Stopping $PROG: "
        killproc $KAM
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && rm -f $LOCK_FILE $PID_FILE
}

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

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


SHM_MEMORY=$((`echo $SHM_MEMORY | sed -e 's/[^0-9]//g'`))
PKG_MEMORY=$((`echo $PKG_MEMORY | sed -e 's/[^0-9]//g'`))
[ -z "$USER" ]  && USER=root
[ -z "$GROUP" ] && GROUP=root
[ $SHM_MEMORY -le 0 ] && SHM_MEMORY=768
[ $PKG_MEMORY -le 0 ] && PKG_MEMORY=16

if test "$DUMP_CORE" = "yes" ; then
    # set proper ulimit
    ulimit -c unlimited

    # directory for the core dump files
    COREDIR=/tmp
    echo "$COREDIR/core.%e.sig%s.%p" > /proc/sys/kernel/core_pattern
fi

OPTIONS="-P $PID_FILE -m $SHM_MEMORY -M $PKG_MEMORY -u $USER -g $GROUP $EXTRA_OPTIONS"


# See how we were called.
case "$1" in
        start|debug)
                start
                ;;
        stop)
                stop
                ;;
        status)
                status $KAM
                RETVAL=$?
                ;;
        restart)
                stop
                start
                ;;
        condrestart)
                if [ -f $PID_FILE ] ; then
                        stop
                        start
                fi
                ;;
        *)
                echo $"Usage: $PROG {start|stop|restart|condrestart|status|debug|help}"
                exit 1
esac

exit $RETVAL