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istdup() is documented as having the same behavior as strdup(). However, it may cause confusion as it allocates a block of input length, without an extra byte for \0 delimiter. This behavior is incoherent as in case of an empty string however a single \0 is allocated. This API inconsistency could cause a bug anywhere an IST is used as a C-string after istdup() invocation. Currently, the only found issue is with 'wait' CLI command using 'srv-unused'. This causes a buffer overflow due to ist0() invocation after istdup() for be_name and sv_name. Backport should be done to all stable releases. Even if no bug has been found outside of wait CLI implementation, it ensures the code is more consistent on every releases.
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 - BRANCHES to understand the project's life cycle and what version to use - 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)