FILENAME="/${SHELL_FILENAME}"
echo "### 001"
{
    > "${FILENAME}"
    bss=4096
    bsl=4095
    if [ $SHELL_FILESIZE -lt $bss ]; then
        bss=1;
        bsl=0;
    fi
    while [ $SHELL_FILESIZE -gt 0 ]; do
        cnt=`expr \\( $SHELL_FILESIZE + $bsl \\) / $bss`
        n=`dd bs=$bss count=$cnt | tee -a "${FILENAME}" | wc -c`
        SHELL_FILESIZE=`expr $SHELL_FILESIZE - $n`
    done
}; echo "### 200"