I think I would prefer the big revision. It produces a more logical
flow of operations.
>When I added authenticators to Exim, I put their configuration at the
>end of the file, so as not to invalidate existing configs. I am now
>thinking about adding the ACL section (as previously discussed) for Exim
>4. Because Exim 4 has no directors (just routers and transports), its
>configuration file is necessarily going to be incompatible, so there is
>the possibility of putting the ACL section somewhere other than at the
>end. This has made me wonder whether there should be a general revision
>of the order of sections. Here are some possibilities:
>
>1. Minimal: Remove directors, put ACL at the end, leading to
> . main
> . transports
> . routers
> . retry
> . rewrite
> . authenticators
> . ACLs
> At least the sections that control input (rewrite, authenticators, ACL)
> and those that control output (transports, routers, retry) are together.
>
>2. A slight variation could be to put ACL before rewrite, as it is
> probably the most important of the input-controlling sections.
>
>3. Big revision: Put input before output, leading to
> . main
> . ACLs
> . authenticators
> . rewrite
> . transports
> . routers
> . retry
>
>4. Transports originally appeared before routers (and directors in Exim
> 3) so that transport names given in the routers could be checked for
> existence when the config was read. Subsequently string expansions for
> transport names were introduced, and these cannot be checked till
> they are used, although in most configs fixed names are still used
> (and checked). However, it takes some people a while to understand
> the order in which the drivers are used, and I wonder if it might help
> to put routers before transports? (And give up on the read-time
> check.) I suppose a similar argument suggests that authenticators
> should come before the ACLs, because authentication happens before
> the ACLs are consulted.
>
>This is all pretty minor, really. Does anybody have any strong views?
>Any views at all?
>
>--
>Philip Hazel University of Cambridge Computing Service,
>ph10@??? Cambridge, England. Phone: +44 1223 334714.
>
>
>--
>## List details at http://www.exim.org/mailman/listinfo/exim-users
>Exim details at http://www.exim.org/ ##
--
|--------------------------------------------------------------------------|
| Steve Sargent, Vox +44 020 7775 3220, Fax +44 020 8980 2001 |
| QMW Computing Services, Mile End Road, London E1 4NS, UK |
| Email : S.L.Sargent@??? |
| WWW page: http://www.qmw.ac.uk/~cgaa160/index.html |
| | |
| PIPER _|_ |
| PA28R ____/___\____ |
| ___________[=o=]___________ |
| ARROW e/ o \e |
|--------------------------------------------------------------------------|
