Re: current_logfiles not following group access and instead follows log_file_mode permissions

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>
Cc: Stephen Frost <sfrost(at)snowman(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Gilles Darold <gilles(dot)darold(at)dalibo(dot)com>
Subject: Re: current_logfiles not following group access and instead follows log_file_mode permissions
Date: 2019-03-12 06:03:16
Message-ID: 20190312060316.GK13812@paquier.xyz
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Tue, Feb 26, 2019 at 12:22:53PM +1100, Haribabu Kommi wrote:
> I checked the code why the current_logfiles is not implemented as
> shared memory and found that the current syslogger doesn't attach to
> the shared memory of the postmaster. To support storing the
> current_logfiles in shared memory, the syslogger process also needs
> to attach to the shared memory, this seems to be a new
> infrastructure change.

I don't think you can do that anyway and we should not do it. Shared
memory can be reset after a backend exits abnormally, but the
syslogger lives across that. What you sent upthread to improve the
documentation is in my opinion sufficient:
https://www.postgresql.org/message-id/CAJrrPGe-v2_LMFD9nHrBEjJy3vVOKJwY3w_h+Fs2nxCJg3PbaA@mail.gmail.com

I would not have split the paragraph you broke into two, but instead
just add this part in-between:
+ <para>
+ Permissions <literal>0640</literal> are recommended to be compatible with
+ <application>initdb</application> option <option>--allow-group-access</option>.
+ </para>
Any objections in doing that?
--
Michael

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Heikki Linnakangas 2019-03-12 06:30:22 Re: Making all nbtree entries unique by having heap TIDs participate in comparisons
Previous Message Andrey Lepikhov 2019-03-12 05:59:41 Re: Suggestions on message transfer among backends