From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Make safeguard against incorrect flags for fsync more portable.
Date: Tue, 01 Jul 2025 16:09:12 +0000
Message-ID: <E1uWdXk-004DHo-0B@gemulon.postgresql.org> (raw)
Make safeguard against incorrect flags for fsync more portable.
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
Branch
------
REL_16_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/3a2617e4f0be734f58f7219986c323469b502921
Modified Files
--------------
src/backend/storage/file/fd.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Make safeguard against incorrect flags for fsync more portable.
In-Reply-To: <E1uWdXk-004DHo-0B@gemulon.postgresql.org>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox