: Cox walks through the byte-level construction, including how to handle the checksums (CRCs) that would normally change when the file's content changes.
The "deep" explanation of how this was achieved can be found on Russ Cox's research site, research!rsc . Download 102k zip
: This is a "quine" zip file—a recursive archive that contains a copy of itself. When you open r.zip , it contains another file also named r.zip , which contains another r.zip , and so on, theoretically forever. The Deep Blog Post : Cox walks through the byte-level construction, including
If you are looking to download the file directly for testing, you can find the link within the original blog post. which contains another r.zip