MAG-250 action.sh with set_key

# cat /home/default/action.sh
#!/bin/sh
#$1 - path; $2 - return value
check_file_path()
{
    DIR1="/ram/media"
    DIR2="/ram/mnt"
    fpath="$1"
    fpath=${fpath%/*}
    rpath=`realpath "$fpath/" 2>/dev/null`
    dir1=${rpath#${DIR1}*}
    dir2=${rpath#${DIR2}*}

    if [ "$rpath" == "" ] ; then
    export $2="Error"
    return;
    fi
    if [ "$dir1" == "$rpath" ] ; then
    if [ "$dir2" == "$rpath" ] ; then
        export $2="Error"
        return;
    fi
    fi
    export $2="Ok"
}

PATH=$PATH:/home/default
case "$1" in
    reboot)
    reboot
    ;;
    bright)
        ;;
    mount_dir)
    check_file_path "$3" ret
    if [ "$ret" == "Error" ]; then
        echo -ne "Error: wrong mount point"
        exit 2;
    fi
        mount -t nfs -o ro,rsize=4096,wsize=4096,nolock,udp "$2" "$3"
        ;;

    umount_dir)
    umount "$2"
        ;;
    make_dir)
        mkdir "$2"
        ;;
    SetVideoOut)
    ;;
    RebootDHCP)
    rebootmng.sh dhcp
    ;;
    UpdateSW)
    # $2  -  upgrade mode
    #   up_ip_tftp
    #   up_dhcp_tftp
    #   up_mc
    rebootmng.sh $2
    ;;
    front_panel)
    /home/default/setFpanel.sh "$2" "$3"
    ;;
    tvsystem)
    mode=""
    case "$2" in
        PAL|576p-50|720p-50|1080i-50|NTSC|576p-60|720p-60|1080i-60|1080p-50|1080p-60)
            mode="$2"
        ;;
        576i)
        mode="PAL"
        ;;
        480i)
        mode="NTSC"
        ;;
    esac
    if [ -n "$mode" ] ; then
        fw_setenv tvsystem $mode
    fi
    ;;
    graphicres)
    case "$2" in
        1920|1280|720|tvsystem_res)
        fw_setenv graphicres $2
        ;;
    esac
    ;;
    timezone)
    TZCONF="/ram/timezone"
    LTCONF="/ram/localtime"
    timezone=$2

        tzconf=`fw_printenv timezone_conf 2>/dev/null`
        tzconf=${tzconf#timezone_conf=}
        if [ "$tzconf" != "$timezone" ]; then
        fw_setenv timezone_conf $timezone
        fi

    if [ -n "$timezone" ]; then
            echo "$timezone" > $TZCONF
            rm $LTCONF
            ln -s /usr/share/zoneinfo/$timezone $LTCONF
    else
            echo "Europe/Kiev" > $TZCONF
            rm $LTCONF
        ln -s /usr/share/zoneinfo/Europe/Kiev $LTCONF
    fi
    ;;
    set_key)
    echo "$2" >/tmp/key
    ;;
    *)  echo Bad Action code.
    ;;
esac