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send_message_to_server_log() would force a redirection of a log entry to stderr in some cases for csvlog, like the syslogger not being available yet. If this happens, csvlog would fall back to stderr to log some information rather than nothing. The code was organized so as stderr is done before csvlog, with csvlog checking that stderr did not happen yet with a reversed condition. With this code organization, it could be possible to lose some messages if running Postgres as a service on WIN32, as there is no usable stderr, and the handling of the StringInfoData holding the message for stderr was rather confusing because of that. This commit moves the csvlog handling to be before stderr, as as we are able to track down if it is necessary to log something to stderr. The reduces the handling of stderr to be in a single code path, adding a fallback to event logs for a WIN32 service. This also simplifies the way we handle the StringInfoData for stderr, making easier the integration of new file-based log destinations. I got to play with services and event logs on Windows while checking this change. Reviewed-by: Chris Bandy Discussion: https://postgr.es/m/YV0vwBovEKf1WXkl@paquier.xyz
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/.