#! /bin/sh
#
#   Copyright(c) 2013-2016, Wind River Systems, Inc. 
#
#   Redistribution and use in source and binary forms, with or without
#   modification, are permitted provided that the following conditions
#   are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in
#       the documentation and/or other materials provided with the
#       distribution.
#     * Neither the name of Wind River Systems nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

#
# chkconfig: - 96 96
#
### BEGIN INIT INFO
# Short-Description: Guest-Client
# Provides: guest-client
# Default-Start: 3 5
# Default-Stop: 0 1 2 6
# Required-Start:
# Required-Stop:
### END INIT INFO

# Assumes that LSB (Linux Standard Base) scripts are available.  On Fedora and
# other Red Hat related distros, the redhat-lsb package is optional.
if [ -f /etc/init.d/functions ]
then
    . /etc/init.d/functions
else
    . /lib/lsb/init-functions
fi

# LSB Exit Codes
#   0 - success
#   1 - generic or unspecified error
#   2 - invalid or excess arguments
#   3 - unimplemented feature
#   4 - user had insufficient privileges
#   5 - program is not installed
#   6 - program is not configured
#   7 - program is not running
#
# LSB Exit Status Codes
#   0 - program is running or service OK
#   1 - program is dead and /var/run pid file exists
#   2 - program is dead and /var/lock lock file exists
#   3 - program is not running
#   4 - program or service status is unknown
#
RETVAL=0

# Update binary location and device to be used, if necessary.
GUEST_CLIENT_NAME="guest-client"
GUEST_CLIENT_PIDFILE="/var/run/${GUEST_CLIENT_NAME}.pid"
GUEST_CLIENT="/usr/bin/${GUEST_CLIENT_NAME}"
GUEST_CLIENT_DEVICE="/dev/virtio-ports/cgcs.heartbeat"

if [ ! -e "${GUEST_CLIENT}" ]
then
    echo "${GUEST_CLIENT} is missing"
    exit 5
fi

PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin

case "$1" in
    start)
        args=""
        if [ -n ${GUEST_CLIENT_DEVICE} ]
        then
            args="--device ${GUEST_CLIENT_DEVICE}"
        fi

        echo -n "Starting ${GUEST_CLIENT_NAME}: "
        if [ -n "`pidof ${GUEST_CLIENT}`" ]
        then
           # Something might have started guest-client already.
           RETVAL=0
        else
           start-stop-daemon --start --background --make-pidfile --pidfile ${GUEST_CLIENT_PIDFILE} --exec ${GUEST_CLIENT} -- ${args}
           RETVAL=$?
        fi
        if [ ${RETVAL} -eq 0 ]
        then
           echo "OK"
        else
           echo "FAIL"
           RETVAL=1
        fi
        ;;

    stop)
        echo -n "Stopping ${GUEST_CLIENT_NAME}: "
        if [ -n "`pidof ${GUEST_CLIENT}`" ]
        then
           killproc ${GUEST_CLIENT}
        fi

        SHUTDOWN_TIMEOUT=10
        count=0
        while [ ${count} -lt ${SHUTDOWN_TIMEOUT} ]
        do
           pidof ${GUEST_CLIENT} &> /dev/null
           rc=$?
           if [ ${rc} -eq 1 ]
           then
              echo "OK"
              break
           fi
           count=`expr ${count} + 1`
           sleep 1
        done

        pidof ${GUEST_CLIENT} &> /dev/null
        rc=$?
        if [ ${rc} -eq 0 ]
        then
           echo "FAIL"
           RETVAL=1
        fi

        rm -f ${GUEST_CLIENT_PIDFILE}
        ;;

    status)
        pid=`cat ${GUEST_CLIENT_PIDFILE} 2>/dev/null`
        if [ -n "${pid}" ]
        then
           if ps -p ${pid} &>/dev/null
           then
              echo "${GUEST_CLIENT_NAME} is running"
              RETVAL=0
           else
              echo "${GUEST_CLIENT_NAME} is not running but has pid file"
              RETVAL=1
           fi
        else
           echo "${GUEST_CLIENT_NAME} is not running"
           RETVAL=3
        fi
        ;;

    restart)
        $0 stop
        sleep 1
        $0 start
        ;;

    reload)
        pid=`cat ${GUEST_CLIENT_PIDFILE} 2>/dev/null`
        if [ -n "${pid}" ]
        then
           echo "${GUEST_CLIENT_NAME} reload"
           kill -HUP ${pid}
        fi
        ;;

    *)
        echo "usage: $0 { start | stop | status | restart | reload }"
        ;;
esac

exit ${RETVAL}