Re: [exim-dev] calling an ACL from an expansion

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Autor: Phil Pennock
Data:  
Dla: Jeremy Harris
CC: exim-dev
Temat: Re: [exim-dev] calling an ACL from an expansion
On 2012-06-11 at 22:32 +0100, Jeremy Harris wrote:
> In a fit of coding insanity I ran up the following:
>
> + 9. New expansion item ${acl {name}{argument}} to call an ACL.  The argument can
> +    be accessed by the ACL in $address_data.  The expansion result is set by
> +    a "message =" modifier and an "accept" return from the ACL.

>
> Is there any value in this going forward?


Is there a reason to reuse $address_data? It seems unwise.

Folks passing data down using $address_data, letting content be
${extract}ed from it, may well want to log/process data from that, but
also have something else be passed in as the ACL argument. Eg,
${extract{usercode}{$address_data}} for log-purposes, showing that
delivery was done by authenticating as that usercode.

If there's no specific reason to override $address_data, just add a new
variable.

If the ACL returns non-accept, does that cause an immediate expansion
failure? Does it count as a forced failure?

-Phil