Date: Tue, 19 Dec 2006 14:11:11 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: Christopher Hilton <chris@vindaloo.com> Cc: freebsd-stable@freebsd.org, freebsd-ports@freebsd.org Subject: Re: Is syslog() reentrant? Was: OpenBSD's spamd. Message-ID: <20061219201110.GB87992@dan.emsphone.com> In-Reply-To: <45884075.50108@vindaloo.com> References: <45844912.7070103@vindaloo.com> <45884075.50108@vindaloo.com>
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In the last episode (Dec 19), Christopher Hilton said:
> Christopher Hilton wrote:
> >Has anyone gotten a newer version of OpenBSD's spamd than the one in
> >ports going? I'm cvsupping my ports tree now but since I didn't see
> >an update on the cvs server I'm assuming 3.7 is the latest version.
> >
> >Between OpenBSD 3.7 and 3.8 spamd gained the ability to tarpit or
> >stutter at all connections for a configurable period of time. I
> >understand that stuttering for the first few seconds of the SMTP
> >dialog causes many spammers to go away before even generating a
> >greylisting tuple. It's something I'd like to try and see for myself
> >and it will be fairly easy since my primary MX is behind an OpenBSD
> >firewall. However, my secondary MX is a FreeBSD box with no such
> >protection and I fear that the spammers will just take advantage of
> >the fact that my secondary MX has weaker protections than my
> >primary.
> >
>
> A casual attempt to compile a fresher copy of the software shows that
> spamd is using the OpenBSD's reentrant syslog functions (syslog_r,
> openlog_r, etc) Is FreeBSD's syslog already reentrant?
It is, as of FreeBSD 5.4. In previous versions only openlog() and
syslog("%m") with an invalid errno were non-reentrant.
http://www.freebsd.org/cgi/query-pr.cgi?pr=72394
--
Dan Nelson
dnelson@allantgroup.com
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