#!/bin/bash

if [ -f /etc/default/kamailio ]; then
                . /etc/default/kamailio
fi

if [ -f /etc/sysconfig/kamailio ]; then
                . /etc/sysconfig/kamailio
fi

RETVAL=0
USER=${KAMAILIO_USER:-kamailio}
GROUP=${KAMAILIO_GROUP:-kamailio}
BIN_FILE=${KAMAILIO_BIN:-/usr/sbin/kamailio}
CFG_FILE=${KAMAILIO_CONFIG:-/etc/kazoo/kamailio/kamailio.cfg}
PID_FILE=/var/run/kazoo-kamailio/kamailio.pid
export HOME=${KAMAILIO_HOME:-/var/run/kamailio}

OPTIONS="-P ${PID_FILE} -m ${SHM_MEMORY} -M ${PKG_MEMORY} -u ${USER} -g ${GROUP} ${EXTRA_OPTIONS}"
SHM_MEMORY=$((`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=8

if test "$DUMP_CORE" = "yes" ; then
        ulimit -c unlimited
fi

# 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.*" $CFG_FILE; then
                echo "Not starting Kamailio: fork=no specified in config file"
                exit 1
        fi
}

check_kamailio_config ()
{
        local ERRORS=$($BIN_FILE -c 2>&1 > /dev/null)
        RETVAL=$?
        if [ "${RETVAL}" != '0' ]; then
                echo "Not starting Kamailio: invalid configuration file!"
                echo -e "\n${ERRORS}\n"
                RETVAL=1
        fi
}

start() {
        check_kamailio_config
        check_fork

        mkdir -p /var/run/kazoo-kamailio
        chown -R ${USER} /var/run/kazoo-kamailio
        mkdir -p /var/run/kamailio
        chown -R ${USER} /var/run/kamailio

        cd ${HOME}
        if [ "$(whoami)" == "${USER}" ]; then
                exec ${BIN_FILE} -f ${CFG_FILE} -P ${PID_FILE} -m ${SHM_MEMORY} -M ${PKG_MEMORY} -u ${USER} -g ${GROUP} ${EXTRA_OPTIONS} $@
        else
                exec su -s /bin/bash -c "${BIN_FILE} -f ${CFG_FILE} -P ${PID_FILE} -m ${SHM_MEMORY} -M ${PKG_MEMORY} -u ${USER} -g ${GROUP} ${EXTRA_OPTIONS} $@" ${USER}
        fi
        RETVAL=$?
}

stop() {
        killproc ${BIN_FILE}
        RETVAL=$?
}

status() {
        kamctl fifo ds_list
        RETVAL=$?
}

case "$1" in
        start)
                shift
                start $@
                ;;
        foreground)
                shift
                start "-DD -E"
                ;;
        stop)
                stop
                ;;
        status)
                status
                ;;
        restart)
                stop
                start
                ;;
        *)
                echo $"Usage: $0 {start|stop|restart|status}"
                RETVAL=1
esac

exit ${RETVAL}