Re: [exim] exim listens on http port

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Autor: Philip Hazel
Datum:  
To: Tim Jackson
CC: exim-users
Betreff: Re: [exim] exim listens on http port
On Tue, 7 Feb 2006, Tim Jackson wrote:

> I believe it happens when there are exim child processes spawned from Apache,
> and you then kill Apache. This happens e.g. if you have perl or php scripts
> that call "/usr/bin/sendmail" or similar to send mail, and those child
> processes are still running when you kill the webserver.
>
> Not being a UNIX networking expert I don't really understand why those child
> processes end up being "bound" to the Apache ports (they're not really
> listening on them in any meaningful sense), but that's what seems to happen.


A forked process inherits its parent's file descriptors. Presumably the
code in appache is forking another process, and then running perl/php
without closing the listening file descriptors.


-- 
Philip Hazel            University of Cambridge Computing Service
Get the Exim 4 book:    http://www.uit.co.uk/exim-book