edx/codejail — pull request #12 by nedbat (2013-07-17 15:35:42+00:00)
Title: Allow programs in the sandbox to write temp files.

This creates a tmp directory in the sandbox directory, and points
TMPDIR at it. Allows writing files to that directory.

@jtauber @cpennington can you review? I can help you understand the code if need be.