Landon Curt Noll
d414b6d71f
Improved `all-run.sh` and `readme2index.sh` so that certain command line options (e.g., -p, -P, -u, -U ...) are only passed along to other tools if they are given on the command line. all-run.sh VERSION changed from "1.1.1 2024-01-19" to "1.1.2 2024-01-20", readme2index.sh VERSION changed from "1.1 2024-01-16" to "1.1.1 2024-01-20". Added `quick-readme2index.sh` that only calls `readme2index.sh` if the `index.html` is not a non-empty file, or of either `.winner.json` and/or `README.md` is newer than `index.html`. Updated all `index.html` files because the the file contains a comment that includes the newly modified readme2index.sh VERSION.
To build:
make
To use:
./hamano < textfile > output.pdf
Try:
./try.sh
The script will generate a number of PDF files and it will suggest you look at
them as well. You can read hint.pdf with a PDF reader like acroread hint.pdf
or evince hint.pdf. With macOS you can do open hint.pdf which by default
will open Preview.app. You may of course use your pdf viewer to open the file
directly instead.
One of the PDF files generated is this README.md file as a PDF, obfuscated, and the PDF file will then be compiled as C (itself!) and executed so that it shows README.md!
Another PDF file generated is obfuscated C code. Once this is done it will compile the PDF as if it was C and then run it like:
echo 'int main(){puts("Hello World!");}' | ./hamano > hello.pdf
cc -Wno-implicit-function-declaration -xc hello.pdf -o hello2
./hello2 | gcc -Wno-implicit-function-declaration -xc - -o ./hello3
./hello3
Judges' remarks:
This entry treads into a new territory for IOCCC - generating PDF files.
The originally submitted entry could have been thought of as a "Best abuse of Ghostscript" winner. :-)
The source code and rendered pages are obfuscated for humans (where is the font?), and the submitted entry created PDF files that left Ghostscript confused.
The results can be viewed with Acrobat Reader, evince and Apple's Preview.
The updated version can also be viewed using Ghostscript.
There is something strange about the little flags in the output. A search of English literature will provide a hint. The conclusion you might draw is too elementary. :-)
So what do those flags really mean?
The Dancing men algorithm might be useful.
Don't forget to take a look at the generated PDF. Perhaps you might even want to compile the output with a C compiler. When you run it, what does it output?
Author's remarks:
This program obfuscate text file into PDF file with Dancing men algorithm.
Probably, the output PDF file is compliant with PDF 1.3 and it's also available to compile as C code.
I've tested it with GCC 4.7 and Clang 3.0 with Linux, and the following PDF Readers:
- Adobe Acrobat Reader
- Evince
- Ghostscript
- Xpdf
Obfuscations
This program is obfuscated by using classical methods. But can you find the embedded font in the fragmented glyph?
Copyright and CC BY-SA 4.0 License:
This file is Copyright (c) 2023 by Landon Curt Noll. All Rights Reserved. You are free to share and adapt this file under the terms of this license:
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
For more information, see: https://creativecommons.org/licenses/by-sa/4.0/