check_dns segfaults when nslookup returns empty answer

[Michel Blomgren]

Hi!

In nagios-plugins-1.3.1:

check_dns seems to segfault when nslookup returns an empty answer, e.g. when 
querrying a non-resolvable hostname.  I know, querrying a nameserver using 
it's hostname is probably not what one want to do, but still, it segfaults.

root at sentinix:/usr/local/nagios/libexec$ ./check_dns -s non_existent -H \ 
a.root-servers.net
Segmentation fault

nslookup directs it's error to stderr, but stdout is completely empty.

I can provide a patch for this, unless of course, anyone hasn't already 
thought about this??!

Best regards,
-- 
Michel Blomgren
SENTINIX Project Manager
http://sentinix.org


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