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The C and POSIX standards state that strncpy's behavior is undefined when source and destination areas overlap. While it remains dubious whether any implementations really misbehave when the pointers are exactly equal, some platforms are now starting to force the issue by complaining when an undefined call occurs. (In particular OS X 10.9 has been seen to dump core here, though the exact set of circumstances needed to trigger that remain elusive. Similar behavior can be expected to be optional on Linux and other platforms in the near future.) So tweak the code to explicitly do nothing when nothing need be done. Back-patch to all active branches. In HEAD, this also lets us get rid of an exception in valgrind.supp. Per discussion of a report from Matthias Schmitt. |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.