Re: [Exim] Looking for a driver/router/transport that will d…

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Autor: Philip Hazel
Fecha:  
A: Lorens Kockum
Cc: exim-users
Asunto: Re: [Exim] Looking for a driver/router/transport that will do qmail-style aliases?
On 12 Oct 2000, Lorens Kockum wrote:

> What I do need is local-parts with several DSUFFIXes in. If I
> have a DSUFFIX several times, won't it take only the last one?


It will take the longest. For user-a-b-c, with suffix=-*, it would treat
"-a-b-c" as the suffix.

> Hmmm, maybe it should. Since suffix isn't a regexp, there's not
> a great deal of control over that.


You can use regexes in local_parts, but I'm not sure that actually helps
you much.

> try in this order, stopping when file is found:
>
> .forward-$1-$2-$3
> .forward-$1-$2-default
> .forward-$1-$2
> .forward-$1-default
> .forward-$1
> .forward-default
> .forward
> regular delivery to user


You could use a succession of directors with local_parts settings, but I
agree this would not be very neat. The first one, for example, would
contain

suffix = -*
local_parts = ^[^-]+(-[^-]+)\{3\}\$
file = .forward{$local_part_suffix}

But I think that's going to get very messy. It might be better to write a
really complicated expansion string using ${exists} and regular
expressions, to check for the file you want. Something like this, maybe:

  suffix = -*
  suffix_optional 
  file = .forward
         ${if match{$local_part_suffix}{^(-[^-]+)?(-[^-]+)?(-[^-]+)?\$}
           {
           ${if exists{$home/.forward$1$2$3}{$1$2$3}
             {
             ${if exists{$home/.forward$1$2-default}{$1$2-default}
               {
               ${if exists{$home/.forward$1$2}{$1$2} 
                {


       .... etc. This is very hairy!


               }}   
             }}
           }}


Apart from being exceedingly hairy, this is doing to do a lot of
redundant tests in the cases when there are fewer than 3 suffixes.


-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.