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Error out on out-of-memory, rather than returning -1, which the sole existing caller wasn't checking for anyway. There doesn't seem to be any use-case for making the caller check for failure here. Detect failure return from readdir(). Use a less platform-dependent method of calculating the entrysize. It's possible, but not yet confirmed, that this explains bug #6733, in which Mike Wilson reports a pg_upgrade crash that did not occur in 9.1. (Note that load_directory is effectively new code in 9.2, at least on platforms that have scandir().) Fix up comments, avoid uselessly using two counters, reduce the number of realloc calls to something sane.
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/.