[Mimedefang] calling system command

David F. Skoll dfs at roaringpenguin.com
Sat Jan 8 12:20:00 EST 2011

On Sat, 08 Jan 2011 09:14:55 -0800
pete <pete at nevill.uk.net> wrote:

> I would like to call a system command when a specific subject string
> is passed.

> if ($Subject =~ /\run ls\b/i) {
>     system("/bin/ls");
>     }

> This works the first time when I send a mail with "run ls" in the
> subject line but causes mimedefang to crash.

The problem is that your filter *must not* print anything to standard
output.  MIMEDefang uses standard output for communication between the
C milter and the Perl scanners; if you print anything to standard output,
MIMEDefang becomes completely confused.

Make sure you redirect standard output (and probably standard error, too)
for any commands you run from your filter.



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