Re: Inverse grep

Tony Finch <>
13 Jun 2011 17:48:13 +0100 (BST)

          From comp.compilers

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From: Tony Finch <>
Newsgroups: comp.compilers
Date: 13 Jun 2011 17:48:13 +0100 (BST)
Organization: dotat labs
References: 11-06-015 11-06-018
Keywords: lex
Posted-Date: 14 Jun 2011 19:26:07 EDT

Chris F Clark <> wrote:
>Actually, most "intrusion detection systems" (IDSes, e.g. Snort) and
>virus scanners (e.g. ClamAV) are essentially just that. Given a
>packet, the contents of the packet are inspected to see which if any
>patterns are matched and if so, the relevant pattern [numbers] are

Another tool to look at is re2c which can be used with SpamAssassin to
compile its rule regexes.

f.anthony.n.finch <>
Faeroes, South-east Iceland: Variable 3 or 4 becoming north or northwest 4 or
5. Moderate. Occasional rain. Moderate or good.

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