Jerry Stuckle <jerry@???> (Mi 07 Jun 2017 03:55:40 CEST):
> Hi, all,
>
> I'm kinda lost here. I have a perl script (call it xyz.pl) I need to
> call from ACL processing (SPAM handling). The script returns the number
> of days since the sending domain was registered or -1 if it can't be
> determined.
"returns"? That is "writes to stdout", right?
For experimenting I recomming using
exim -be '${run{/path/to/command param…}{A}{B}}'
Where "A" and "B" are expanded depending on the exit status of the
command. The string $value may be used there and contains the merged
stdout/stderr from the command.
Note, that the environment is *empty* (as if you call your program `env
-i program`), even $PATH isn't set there!
(See keep_environment, add_environment options for ways to change this.)
To ease writing you may set a MACRO:
DAYS_REGISTERED = ${run{/path/to/command $sender_address_domain}{$value}}
begin acl
…
deny condition = ${if <{DAYS_REGISTERED}{7}}
------
But, if you have it in a perl script already, you may want to use Exim's
builtin Perl capabilities. (I suppose, you wrote a Perl module,
having a days_registered() subroutine in @EXPORT_OK)
perl_startup = use My::Module qw(days_registered);
DAYS_REGISTERED = ${perl{days_registered}{$sender_address_domain}}
# ACL as above
The use of the MACRO is to improve the readability only.
The use of the perl_startup doesn't give you any benefit here, except
readability and a cleaner interface. In case you need to call more Perl
scripts/functions, you get a performance gain, since the Perl
interpreter gets loaded only once.
As long as you do not reach the ${perl…} part of the configuration,
there is no performance hit, since Exim delays loading of Perl until
it's needed.
> I have the script working, but having trouble figuring out how to call
> it from Exim and handle the return code. And the more I go through the
> docs, the more confused I get - Exim is just too powerful!
Uhm… The return code?
You return the number of days as return code? What if the domain is
registered for >254 days?
I'd send the days to stdout, using the return code only to indicate some
error!
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
--
SCHLITTERMANN.de ---------------------------- internet & unix support -
Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} -
gnupg encrypted messages are welcome --------------- key ID: F69376CE -
! key id 7CBF764A and 972EAC9F are revoked since 2015-01 ------------ -
