Author:

• Name: Garry Glendown
  Location: DE - Federal Republic of Germany (Germany)

To build:

    make all

To use:

    ./garry <input_file >output_file

Try:

    ./try.sh

Alternate code:

While it may not have been the intention of the author, the judges noted that the C pre-processed version (with the #includes left intact) looked very much like a rat “dropping core”. See garry.alt.c and judge for yourself!

Alternate build:

    make alt

Alternate use:

    ./garry.alt <input_file >output_file

Alternate try:

    ./try.alt.sh

Judges’ remarks:

The author was kind enough to provide a less obfuscated version of the source called garry.fmt.c.

Author’s remarks:

This program is a file filter, designed to do environment-expansion and incorporating the ability to create binary from escaped data in the environment variables.

The calling syntax is pretty simple, just use it with stdio-redirection or inside pipelines, e.g.:

    ./garry <file_to_convert >converted_file

or

    cat all_my_files/* | ./garry | lp

The syntax of the conversion of the input file is as follows: To include the value of an environment variable in the output file, place the name of the variable between $-signs in the input, e.g.:

    My Home-Directory is: $HOME$
    I'm using the path: $PATH$

Unknown Env-variables or malformed expressions are ignored and kept intact.

Additionally, the filter replaces escaped octal values in the environment variables by their binary representation, e.g.:

    $ TEST="\110\145\154\154\157"
    $ export TEST
    $ echo '$TEST$' | ./garry
    Hello

Primary files

• garry.c - entry source code
• Makefile - entry Makefile
• garry.alt.c - alternate source code
• garry.orig.c - original source code
• garry.data - modified README.md for input to program
• try.alt.sh - script to try alternate code
• try.sh - script to try entry
• garry.fmt.c - author provided unobfuscated and formatted source code

Secondary files

• 1995_garry.tar.bz2 - download entry tarball
• README.md - markdown source for this web page
• .entry.json - entry summary and manifest in JSON
• .gitignore - list of files that should not be committed under git
• .path - directory path from top level directory
• index.html - this web page

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