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Commit 0da33c762 introduced an unfortunate regression in pg_ctl on Windows: if the log file specified with -l doesn't exist yet, and pg_ctl is running with Administrator privileges, then the log file might get created with permissions that prevent the postmaster from writing on it. (It seems that whether this happens depends on whether the log file is inside the user's home directory or not, and perhaps on other phase-of-the-moon conditions, which may explain why we failed to notice it sooner.) To fix, just don't create the log file if it doesn't exist yet. The case where we need to wait obviously only occurs with a pre-existing log file. In passing, switch from using fopen() to plain open(), saving a few cycles. Per bug #16259 from Jonathan Katz and Heath Lord. Back-patch to v12, as the faulty commit was. Alexander Lakhin Discussion: https://postgr.es/m/16259-c5ebed32a262a8b1@postgresql.org
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/.