#!/bin/sh
#
# cdemu-daemon: CDEmu daemon
#

### BEGIN INIT INFO
# Provides:          cdemu-daemon
# Short-Description: Start the CDEmu daemon
# Description:       System mode startup script for
#                    the CDEmu daemon.
### END INIT INFO

# This script is based on the ubuntu and fedora init script.
# Modified by Nille Åkerström
# Modifies by Niels Horn <niels.horn@gmail.com>

NAME="cdemud"
DESC="cdemu-daemon"
MODULE="vhba"
CTL_DEVICE="/dev/vhba_ctl"
PID=$(/sbin/pidof -o %PPID ${NAME})

start() 
{
    # Check if already started
    if [ -n "${PID}" ] ;then
        echo "${DESC} is already running at pid: ${PID}"
        return ${RETVAL}
        exit
    fi

    # Load module
    if [ -n "${MODULE}" ]; then
        echo -n "Inserting ${MODULE} kernel module"
        modprobe "${MODULE}" >/dev/null 2>&1
        RETVAL=$?
        if [ ${RETVAL} -eq 0 ]; then
            echo -e "\t\t\t\t\t[  OK  ]\r"
        else
            echo -e "\t\t\t\t\t[FAILED]\r"
            exit 1
        fi
    fi
    
    # Wait until control device is created...
    if [ -n "${CTL_DEVICE}" ]; then
        echo -n "Waiting for ${CTL_DEVICE} to be created"

        CTL_WAIT=30 # Wait at most 30 seconds
        RETVAL=1
        until [ ${CTL_WAIT} -eq 0 ]; do
            if [ -c "${CTL_DEVICE}" ]; then
                CTL_WAIT=0
                RETVAL=0
            else
                CTL_WAIT=$((CTL_WAIT-1))
                sleep 1
            fi
        done

        if [ ${RETVAL} -eq 0 ]; then
            echo -e "\t\t\t\t[  OK  ]\r"
        else
            echo -e "\t\t\t\t[FAILED]\r"
            exit 1
        fi
    fi

    # Start daemon
    # ... we don't really start the daemon, this is done by dbus
    return ${RETVAL}
}

stop() 
{
    # Stopping daemon
    echo -n "Stopping ${DESC}"
    if [ -n "${PID}" ] ;then
        kill ${PID}
        RETVAL=$?
        if [ ${RETVAL} -eq 0 ]; then
            echo -e "\t\t\t\t\t\t[  OK  ]\r"
            else
            echo -e "\t\t\t\t\t\t[FAILED]\r"
        fi
        sleep 2
    else 
        echo -e "\t\t\t\tWarning: ${DESC} isn't running"
        RETVAL=0
    fi

    # Unload module
    echo -n "Removing ${MODULE} kernel module"
    LOADED=`lsmod | grep -o -e ^${MODULE} -`
    if [ "${LOADED}" = "${MODULE}" ]; then
        modprobe -r "${MODULE}" >/dev/null 2>&1
        RETVAL=$?
        if [ ${RETVAL} -eq 0 ]; then
            echo -e "\t\t\t\t\t[  OK  ]\r"
        else
            echo -e "\t\t\t\t\t[FAILED]\r"
        fi
    else
        echo -e "\t\t\tWarning: ${MODULE} isn't loaded"
        RETVAL=0
    fi
    return ${RETVAL}
}

restart() {
    stop
    RETVAL=$?
    if [ ${RETVAL} -eq 0 ]; then
        PID=$(/sbin/pidof -o %PPID ${NAME})
        start
        RETVAL=$?
        if [ ${RETVAL} -ne 0 ]; then
            echo "Couldn't start ${DESC} retry in 3sec."
            sleep 3
            start
            RETVAL=$?
        fi
    fi
    return ${RETVAL}
}

# See how we were called.
case "$1" in
    "start")
        start
        ;;
    "stop")
        stop
        ;;
    "restart")
        restart
        ;;
    *)
        echo "Usage: $0 {start|stop|restart}"
        ;;
esac

exit ${RETVAL}