Date: Wed, 29 Jul 1998 10:53:44 -0700 (PDT) From: Brooks Davis <brdavis@orion.ac.hmc.edu> To: Brett Glass <brett@lariat.org> Cc: andrew@squiz.co.nz, security@FreeBSD.ORG Subject: Re: Any procmail experts here? Message-ID: <Pine.SOL.4.02.9807291045310.14722-100000@orion.ac.hmc.edu> In-Reply-To: <199807291630.KAA11022@lariat.lariat.org>
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On Wed, 29 Jul 1998, Brett Glass wrote:
> Wow.... That means invoking both procmail AND Perl on every message.
> Not such a good idea on a busy mail server. (And, of course, Perl
> will recompile the regex each and every time it executes.) How could
> one avoid this?
>
> At 06:50 PM 7/29/98 +1200, Andrew McNaughton wrote:
>
> >:0 hfw
> >* ^Content-disposition:
> >| /usr/local/bin/perl -pe 's/^(Content-Disposition:.{80}).*/$1/i'
Procmail doesn't really let you make changes to messages so you're going
to have to invoke an external program to do that, but you could write a
very simple C program to print a message back exactly like it was with
shortened Content-disposition: headers (just make sure to avoid writing a
buffer overflow into that program ;-). You could also change the rule set
to the following to only envoke perl on the bad cases.
:0 hfw
* ^Content-disposition:.{80}
| /usr/local/bin/perl -pe 's/^(Content-Disposition:.{80}).*/$1/i'
I haven't tested that, but procmail is supposed to use egrep expressions
and Solaris egrep claims to supports {#} notation.
-- Brooks
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