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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Justin Pryzby <pryzby@telsasoft.com>
Cc: Fabien COELHO <coelho@cri.ensmp.fr>
Cc: pgsql-hackers@postgresql.org, Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: David Steele <david@pgmasters.net>
Cc: Bossart, Nathan <bossartn@amazon.com>
Cc: Thomas Munro <thomas.munro@gmail.com>
Subject: Re: pg11+: pg_ls_*dir LIMIT 1: temporary files .. not closed at end-of-transaction
Date: Tue, 31 Mar 2020 12:41:50 -0400
Message-ID: <11882.1585672910@sss.pgh.pa.us> (raw)
In-Reply-To: <20200331080643.GE14618@telsasoft.com>
References: <24244.1585415634@sss.pgh.pa.us>
	<20200328183904.GI20103@telsasoft.com>
	<28906.1585422475@sss.pgh.pa.us>
	<27064.1585499825@sss.pgh.pa.us>
	<20200329171415.GL20103@telsasoft.com>
	<29512.1585502524@sss.pgh.pa.us>
	<20200329201215.GM20103@telsasoft.com>
	<alpine.DEB.2.21.2003300704430.16227@pseudo>
	<4028.1585579463@sss.pgh.pa.us>
	<alpine.DEB.2.21.2003310723560.16227@pseudo>
	<20200331080643.GE14618@telsasoft.com>

Justin Pryzby <pryzby@telsasoft.com> writes:
> I suggest to leave stat() alone in your patch for stable releases.  I think
> it's okay if we change behavior so that a broken symlink is skipped instead of
> erroring (as a side effect of skipping ENOENT with stat()).  But not okay if we
> change pg_ls_logdir() to hide symlinks in back braches.

Meh.  I'm not really convinced, but in the absence of anyone expressing
support for my position, I'll do it that way.  I don't think it's worth
doing both a stat and lstat to tell the difference between file-is-gone
and file-is-a-broken-symlink.

			regards, tom lane





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