#APPE $FISH_FILESIZE $FISH_FILENAME
echo "### 001"
FILENAME="/$FISH_FILENAME"
res=`exec 3>&1
(
    head -c $FISH_FILESIZE -q - || echo DD >&3
) 2>/dev/null | (
    cat > "${FILENAME}"
    cat > /dev/null
)`; [ "$res" = DD ] && {
    > "${FILENAME}"
    while [ $FISH_FILESIZE -gt 0 ]
    do
       cnt=`expr \\( $FISH_FILESIZE + 255 \\) / 256`
       n=`dd bs=256 count=$cnt | tee -a "${FILENAME}" | wc -c`
       FISH_FILESIZE=`expr $FISH_FILESIZE - $n`
    done
}; echo "### 200"