#! /bin/bash
# chkconfig: 2345 55 25
# Description: Startup script for kcptun on Debian. Place in /etc/init.d and
# run 'update-rc.d -f kcptun defaults', or use the appropriate command on your
# distro. For CentOS/Redhat run: 'chkconfig --add kcptun'
#=======================================================
#   System Required:  CentOS/Debian/Ubuntu (32bit/64bit)
#   Description:  Manager for kcptun
#   Intro:  https://git.oschina.net/wayrt/kcptun_for_ss_ssr/issues
#=======================================================
### BEGIN INIT INFO
# Provides:          kcptun
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the kcptun
# Description:       starts kcptun using start-stop
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
ProgramName="kcptun"
ProgramPath="/usr/local/kcptun"
NAME=kcptun
BIN=${ProgramPath}/${NAME}
CONFIGFILE=${ProgramPath}/config.json
LOGFILE=/var/log/${NAME}.log
SCRIPTNAME=/etc/init.d/${NAME}
PID_DIR=/var/run
PID_FILE=${PID_DIR}/${ProgramName}.pid
version="2.0"
RET_VAL=0

[ -x ${BIN} ] || exit 0
if [ ! -r ${CONFIGFILE} ]; then
    echo "config file ${CONFIGFILE} not found"
    exit 1
fi
fun_clangcn()
{
    echo
    echo "+----------------------------------------------------------------+"
    echo "|                        Manager for kcptun                      |"
    echo "+----------------------------------------------------------------+"
    echo "| Intro: https://git.oschina.net/wayrt/kcptun_for_ss_ssr/issues|"
    echo "+----------------------------------------------------------------+"
    echo
}
fun_check_run(){
    PID=`ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}'`
    if [ ! -z $PID ]; then
        return 0
    else
        rm -f ${PID_FILE}
        return 1
    fi
}
fun_start()
{
    log_flag="$1"
    if [[ "${arg1}" =~ ^[Ss][Tt][Aa][Rr][Tt]$ ]]; then
      fun_clangcn
    fi
    if [ ! -d ${PID_DIR} ]; then
        mkdir -p ${PID_DIR} || echo "failed creating PID directory ${PID_DIR}"; exit 1
    fi
    if fun_check_run; then
        echo "${ProgramName} (pid $PID) already running."
        return 0
    fi
    if [[ "${log_flag}" =~ ^[Ll][Oo][Gg]$ ]]; then
        strLog="${LOGFILE}"
    else
        strLog="/dev/null"
    fi
    echo -n "Starting ${ProgramName}..."
    ${BIN} -c ${CONFIGFILE} > ${strLog} 2>&1 &
    sleep 0.3
    if ! fun_check_run; then
        echo "start failed"
        return 1
    fi
    echo " done"
    ${BIN} -v
    echo "${ProgramName} (pid $PID)is running."
    if [[ "${log_flag}" =~ ^[Ll][Oo][Gg]$ ]]; then
        echo "read ${LOGFILE} for log"
    fi
    return 0
}

fun_stop(){
    if [[ "${arg1}" =~ ^[Ss][Tt][Oo][Pp]$ ]] || [[ "${arg1}" =~ ^[Rr][Ee][Ss][Tt][Aa][Rr][Tt]$ ]]; then
      fun_clangcn
    fi
    if fun_check_run; then
        echo -n "Stoping ${ProgramName} (pid $PID)... "
        kill $PID
        if [ "$?" != 0 ] ; then
            echo " failed"
            exit 1
        else
            echo " done"
            rm -f $PID_FILE
        fi
    else
        echo "${ProgramName} is not running."
    fi
}
fun_restart(){
    local restart_log_flag="$1"
    fun_stop
    if [[ "${restart_log_flag}" =~ ^[Ll][Oo][Gg]$ ]]; then
        fun_start log
    else
        fun_start
    fi
}
fun_status(){
    PID=`ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}'`
    if [ ! -z $PID ]; then
        echo "${ProgramName} (pid $PID) is running..."
    else
        echo "${ProgramName} is stopped"
        exit 0
    fi
}
fun_config(){
    vi ${CONFIGFILE}
}
fun_version(){
    ${BIN} -v
}

arg1=$1
arg2=$2
[  -z ${arg1} ]
case "${arg1}" in
    start|stop|restart|status|config)
        fun_${arg1} ${arg2}
    ;;
    [vV][eE][rR][sS][iI][oO][nN]|-[vV][eE][rR][sS][iI][oO][nN]|--[vV][eE][rR][sS][iI][oO][nN]|-[vV]|--[vV])
        fun_version
    ;;
    *)
        fun_clangcn
        echo "Usage: $SCRIPTNAME {start|stop|restart|status|config|version}"
        RET_VAL=1
    ;;
esac
exit $RET_VAL