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The existing code assumed that O_RDONLY is defined as 0, but this is not required by POSIX and is not true on GNU Hurd. We can avoid the assumption by relying on O_ACCMODE to mask the fcntl() result. (Hopefully, all supported platforms define that.) Author: Michael Banck <mbanck@gmx.net> Co-authored-by: Samuel Thibault Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/6862e8d1.050a0220.194b8d.76fa@mx.google.com Discussion: https://postgr.es/m/68480868.5d0a0220.1e214d.68a6@mx.google.com Backpatch-through: 13
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.