dovecot - Mar 2023 - Multiple scripts with postlogin

Hello,

I'm having trouble understanding how to execute separate scripts with 
postlogin. According to the documentation, it should be as simple as:

You can run multiple post-login scripts by just giving multiple scripts as
parameters to|script-login|, for example:
executable = script-login rawlog /usr/local/bin/postlogin.sh
/usr/local/bin/postlogin2.sh

Given this information, I supplied two scripts to service imap-postlogin 
below:

service imap {
 ? executable = imap imap-postlogin
}

service imap-postlogin {
 ? executable = script-login -d rawlog /usr/local/bin/postlogin.pl
/usr/local/bin/postlogin2.pl
 ? user = $default_internal_user
 ? unix_listener imap-postlogin {
 ? }
}

Both scripts simply print "Script 1" and "Script 2" to
STDERR. Here is
what they look like:

#!/usr/bin/perl

use strict;
use warnings;

print STDERR "Script 1\n";
system("/usr/lib/dovecot/script-login");

After logging in, only the first script is executed. The second one is 
ignored. I tried not executing "/usr/lib/dovecot/script-login" in the 
first script, in hopes that it would execute the second script, but it 
only denies the connection after printing "Script 1"

imap-postlogin: Error: Script 1
imap(<user>): Error: Post-login script denied access to user <user>

Am I missing something?

Thanks.


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> On 01/03/2023 20:39 EET Dan Conway <darkc0de at archnix6.net> wrote:
> 
> 
> Hello,
> I'm having trouble understanding how to execute separate scripts with
postlogin. According to the documentation, it should be as simple as:
> 
> You can run multiple post-login scripts by just giving multiple scripts as
parameters to?script-login, for example:
> executable = script-login rawlog /usr/local/bin/postlogin.sh
/usr/local/bin/postlogin2.sh
> 
> Given this information, I supplied two scripts to service imap-postlogin
below:
> service imap {
> ? executable = imap imap-postlogin
> }
> 
> service imap-postlogin {
> ? executable = script-login -d rawlog /usr/local/bin/postlogin.pl
/usr/local/bin/postlogin2.pl
> ? user = $default_internal_user
> ? unix_listener imap-postlogin {
> ? }
> }
> 
> Both scripts simply print "Script 1" and "Script 2" to
STDERR. Here is what they look like:
> #!/usr/bin/perl
> 
> use strict;
> use warnings;
> 
> print STDERR "Script 1\n";
> system("/usr/lib/dovecot/script-login");
> 
> After logging in, only the first script is executed. The second one is
ignored. I tried not executing "/usr/lib/dovecot/script-login" in the
first script, in hopes that it would execute the second script, but it only
denies the connection after printing "Script 1"
> 
> imap-postlogin: Error: Script 1
> imap(<user>): Error: Post-login script denied access to user
<user>
> Am I missing something?
> Thanks.
> 
> 
> 
> 
>
You need to use exec, not system. system executes it as child process, and then
returns to your current script, exec replaces your execution with script-login.

Aki