doveadm who reverse dns lookups

[Steffen Kaiser]

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On Tue, 24 Jul 2018, Michael Grant wrote:

> Perhaps this is a feature request...
>
> It would be nice if the ‘doveadm who’ command printed out the reverse dns name of where the user was logged in from.
>
> Would it be possible to either add some option to doveadm who for this, or make it the do it by default and add a ‘-n’ option (like many of the other programs that look up ip addresses by default) and take a -n option to not do that?
>
> Not sure if that would break some existing thing which is why I hesitate.  Might be safer to add, say, a -r option to do the rDNS lookup.

Hmm, use the Unix construction kit:

doveadm who| perl -np -MSocket -e 'sub addr { my $i = shift; my $iaddr =
   inet_aton($i); return gethostbyaddr($iaddr, AF_INET) || $i; }
   s/((?:\d+\.){3}\d+)/addr($1)/eg'

- -- 
Steffen Kaiser
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