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Most modern platforms don't touch the output buffer when the size argument is null, but there exist a few old ones (like AIX 5 and possibly Tru64) where the output will be dereferenced anyway, probably to write the trailing null, crashing the process. memprintf() uses this to measure the desired length. There is a very simple workaround to this consisting in passing a pointer to a character instead of a NULL pointer. It was confirmed to fix the issue on AIX 5.1.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)