reveal makes the following assumptions:

• reveal will be run from the dist directory which contains the exam code and a admin directory
• the sticky bit on dist and admin is set, and hints (and all files inside it) is owned by, and only readable/writable by root

Setting up

To set up for a new exam environment:

1. Change the appropriate TODOs in src/main.rs (notably, the password that's used for the zip archive, the relevant files to zip, the list of hint file names).
2. install reveal on the test machines, making sure that it runs as a privileged user.
3. Set up the exam directory with the directory structure

dist/
 - exam/                # all exam code
 - admin/               # privileged directory with sticky bit set
 - - hints/             # privileged directory containing hint files
 - - hint.record        # privileged file with contents "0" * num_hints
 - - transactions.log   # privileged empty file

4. Fill the admin/hints directory with the hint files. The name of each hint file should be the same as the same number of the exam question it corresponds to and should contain the text of the hint.