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This commit moves pg_pwritev_with_retry(), a convenience wrapper of pg_writev() able to handle partial writes, to common/file_utils.c so that the frontend code is able to use it. A first use-case targetted for this routine is pg_basebackup and pg_receivewal, for the zero-padding of a newly-initialized WAL segment. This is used currently in the backend when the GUC wal_init_zero is enabled (default). Author: Bharath Rupireddy Reviewed-by: Nathan Bossart, Thomas Munro Discussion: https://postgr.es/m/CALj2ACUq7nAb7=bJNbK3yYmp-SZhJcXFR_pLk8un6XgDzDF3OA@mail.gmail.com
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: https://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. 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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.