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

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
ProgramName="frps"
ProgramPath="/usr/local/frps"
NAME=frps
BIN=${ProgramPath}/${NAME}
CONFIGFILE=${ProgramPath}/frps.toml
SCRIPTNAME=/etc/init.d/${NAME}
version="2024"
program_version=`${BIN} --version`
RET_VAL=0

[ -x ${BIN} ] || exit 0
strLog=""
fun_frps()
{
    echo ""
    echo "+---------------------------------------------------------+"
    echo "|     Manager for ${ProgramName}, Author Clang, Mender MvsCode      |"
    echo "+---------------------------------------------------------+"
    echo ""
}

fun_check_run(){
    PID=`ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}'`
    if [ ! -z $PID  ]; then
        return 0
    else
        return 1
    fi
}
fun_load_config(){
    if [ ! -r ${CONFIGFILE} ]; then
        echo "config file ${CONFIGFILE} not found"
        return 1
    fi
}
fun_start()
{
    if [ "${arg1}" = "start" ]; then
      fun_frps
    fi
    if fun_check_run; then
        echo "${ProgramName} (pid $PID) already running."
        return 0
    fi
    fun_load_config
    echo -n "Starting ${ProgramName}(${program_version})..."
    ${BIN} -c ${CONFIGFILE} >/dev/null 2>&1 &
    sleep 1
    if ! fun_check_run; then
        echo "start failed"
        return 1
    fi
    echo " done"
    echo "${ProgramName} (pid $PID)is running."
    return 0
}

fun_stop(){
    if [ "${arg1}" = "stop" ] || [ "${arg1}" = "restart" ]; then
      fun_frps
    fi
    if fun_check_run; then
        echo -n "Stoping ${ProgramName} (pid $PID)... "
        kill $PID
        if [ "$?" != 0 ] ; then
            echo " failed"
            return 1
        else
            echo " done"
        fi
    else
        echo "${ProgramName} is not running."
    fi
    return 0
}
fun_restart(){
    fun_stop
    fun_start
}
fun_status(){
    PID=`ps -ef | grep -v grep | grep -i "${BIN}" | awk '{print $2}'`
    if [ ! -z $PID ]; then
        echo "${ProgramName} (pid $PID) is running..."
    else
        echo "${ProgramName} is stopped"
        exit 0
    fi
}
checkos(){
    if grep -Eqi "CentOS" /etc/issue || grep -Eq "CentOS" /etc/*-release; then
        OS=CentOS
    elif grep -Eqi "Red Hat Enterprise Linux" /etc/issue || grep -Eq "Red Hat Enterprise Linux" /etc/*-release; then
        OS=RHEL
    elif grep -Eqi "Fedora" /etc/issue || grep -Eq "Fedora" /etc/*-release; then
        OS=Fedora
    elif grep -Eqi "Rocky" /etc/issue || grep -Eq "Rocky" /etc/*-release; then
        OS=Rocky
    elif grep -Eqi "AlmaLinux" /etc/issue || grep -Eq "AlmaLinux" /etc/*-release; then
        OS=AlmaLinux
    elif grep -Eqi "Debian" /etc/issue || grep -Eq "Debian" /etc/*-release; then
        OS=Debian
    elif grep -Eqi "Ubuntu" /etc/issue || grep -Eq "Ubuntu" /etc/*-release; then
        OS=Ubuntu
    else
        echo "Unsupported OS. Please use a supported Linux distribution and retry!"
        exit 1
    fi
}
fun_config(){
    if [ -s ${CONFIGFILE} ]; then
        vi ${CONFIGFILE}
    else
        echo "${ProgramName} configuration file not found!"
        return 1
    fi
}
fun_version(){
    echo "${ProgramName} version ${program_version}"
    return 0
}
fun_help(){
    ${BIN} --help
    return 0
}

arg1=$1
[  -z ${arg1} ]
case "${arg1}" in
    start|stop|restart|status|config)
        fun_${arg1}
    ;;
    [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
    ;;
    [Cc]|[Cc][Oo][Nn][Ff]|[Cc][Oo][Nn][Ff][Ii][Gg]|-[Cc]|-[Cc][Oo][Nn][Ff]|-[Cc][Oo][Nn][Ff][Ii][Gg]|--[Cc]|--[Cc][Oo][Nn][Ff]|--[Cc][Oo][Nn][Ff][Ii][Gg])
        fun_config
    ;;
    [Hh]|[Hh][Ee][Ll][Pp]|-[Hh]|-[Hh][Ee][Ll][Pp]|--[Hh]|--[Hh][Ee][Ll][Pp])
        fun_help
    ;;
    *)
        fun_frps
        echo "Usage: $SCRIPTNAME {start|stop|restart|status|config|version}"
        RET_VAL=1
    ;;
esac
exit $RET_VAL