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Re: syslogger line-end processing infelicity

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: syslogger line-end processing infelicity
Date: 2007-06-02 01:11:54
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers

Tom Lane wrote:
> The other little problem (which is the reason we like the stderr
> approach in the first place) is that not all the stderr output we want
> to capture comes from code under our control.  This may not be a huge
> problem in production situations, since the main issue in my experience
> is being able to capture dynamic-linker messages when shlib loading fails.
> But it is a stumbling block in the way of any proposals that involve
> having a more structured protocol for the stuff going down the wire :-(

I don't think that need worry us about CSV output - AFAICS it's 
redirected quite separately from stderr - more like syslog really, so 
the CSV output *is* all from code under our control.

I'm pondering some very simple method of signalling the end of a CSV 
line, like appending a null byte (which we would of course strip out, so 
it would never appear on the file), and only allowing a CSV log rotation 
if we are on a boundary.



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