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_15_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/0fb496c704fce0daeb01cb3736a827ec009f382e
Modified Files
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src/backend/storage/file/fd.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
