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Move the code that sends the initial status information as well as the calculation of paths inside the ENSURE_ERROR_CLEANUP block. If this code failed, we would "leak" a counter of number of concurrent backups, thereby making the system always believe it was in backup mode. This could happen if the sending failed (which it probably never did given that the small amount of data to send would never cause a flush) or if the psprintf calls ran out of memory. Both are very low risk, but all operations after do_pg_start_backup should be protected.
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. 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/.