Re: PostgreSQL crashes with Qmail-SQL

From: Vince Vielhaber <vev(at)michvhf(dot)com>
To: Doug McNaught <doug(at)wireboard(dot)com>
Cc: Bear Giles <bear(at)coyotesong(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com>, Michael Devogelaere <michael(at)digibel(dot)be>, Justin Clift <justin(at)postgresql(dot)org>, PostgreSQL Hackers Mailing List <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: PostgreSQL crashes with Qmail-SQL
Date: 2002-02-01 20:12:13
Message-ID: Pine.BSF.4.40.0202011509280.24794-100000@paprika.michvhf.com
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On 1 Feb 2002, Doug McNaught wrote:

> Bear Giles <bear(at)coyotesong(dot)com> writes:
>
> > > Caution: I wasted some time running "benchmarks" that proved only
> > > to be exercising how fast the client could fail. qmail-getpw's
> > > approach to error handling seems to be (a) don't bother testing for
> > > very many error conditions (eg, it coredumps on an empty sqlserver
> > > control file), and (b) if it does detect a failure, exiting with a
> > > nonzero error code is a sufficient way of reporting it. Error messages
> > > are for wimps, apparently.
> >
> > (b) is part of the qmail strategy - qmail is implemented as a set
> > of independent processes with different owners and rights and they
> > communicate problems through standard exit codes.
> >
> > We can agree that it should be more forthcoming with meaningful
> > help for people setting up the system, but it can't just write an
> > message to STDOUT because its caller has probably already set up
> > a pipe to another process - any error message would normally find
> > itself inserted into the mail queue!
>
> Gaah. Has djb ever heard of syslog(3)? Or is that too insecure for
> him?

Insecure and slow. Check out multilog which is part of daemontools.

http://cr.yp.to/daemontools/multilog.html

Vince.
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