<b_jonas> slashlearn farbfeld//zzo38\'s Farbfeld utilities is a package of command-line programs (with rather strange command-line syntax) for manipulating images in a specific raw format called farbfeld. It\'s somewhat underdocumented. http://zzo38computer.org/fossil/farbfeld.ui/home

#!/bin/bash
if [ "$1" ] && url "$1" 2>/dev/null # Save making a file when it already exists.
then
    true
else
    PASTENUM="$RANDOM"

    mkdir -p $HACKENV/tmp/paste

    url tmp/paste/paste."$PASTENUM"
    cat -- "${1--}" > $HACKENV/tmp/paste/paste."$PASTENUM"
fi