devel_guide.rst

Notes for Deckard developers

socket wrapper library (cwrap)

Detailed instructions on using cwrap you can be found here

cwrap environment is managed by Deckard. Default values are sufficient, do not touch the environment unless you are trying to debug something. Variables available for direct use are:

• SOCKET_WRAPPER_DIR is a generic working directory. It defaults to a new temporary directory with randomly generated name, prefixed by tmpdeckard. When a test fails, the work directory can contain useful information for post-mortem analysis. You can explicitly set SOCKET_WRAPPER_DIR to a custom path for more convenient analysis.
• SOCKET_WRAPPER_DEBUGLEVEL is not set by default.

Deckard automatically sets SOCKET_WRAPPER_PCAP_FILE to create separate PCAP files in working directory for Deckard itself and each daemon. Feel free to inspect them.

libfaketime

Run-time changes to FAKETIME_ environment variables might not be picked up by running process if FAKETIME_NO_CACHE=1 variable is not set before the process starts.