SPUG: [OT] procmail extended regexp Re: Regular Expression

[John Costello]

On Thu, 7 Jul 2005, Duane Blanchard wrote:

> My favorite online reference is http://www.regular-expressions.info/
> which covers more material for more environments than I can fathom.
> 
> Duane

Related to regular expressions, does anyone know of a good discussion of 
procmail's regular expressions?  I encountered an odd example (discussed 
earlier this month on LondonPM) in which I wasn't sure if procmail would 
treat $? as an environment variable or an optional end-of-line character.

John

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John Costello - cos at indeterminate dot net