How to get easily (from a script) all CNAME of a A record?

[Michelle Konzack]

Hello Matus UHLAR - fantomas,

Am 2010-11-09 14:13:47, hacktest Du folgendes herunter:
> I am not sure whether dnswalk over whole internet can do that, but on your

I will try it...

> server you can either run recursive grep over named data directory, or dump
> the named dsatabase and grep it...

This is what I currently do...

----[ '/usr/sbin/get_hosts_in cname' ]----------------------------------
#!/bin/sh

QUERY="$1"

for FILE in $(cd /etc/bind && ls *.signed)
do
  grep --regexp=" IN CNAME .*${QUERY}" /etc/bind/${FILE} 2>/dev/null |cut -d ' ' -f1 |sed 's|.$||'
done
------------------------------------------------------------------------

...and it is to slow do to more then  80.000  Zones  (they  have  to  be
greped all) number of VHosts.

Oh, it is now time to use "xargs", because I saw today, that I  hit  the
limits for "ls".  :-D

Following is working:
    cd /etc/bind && ls

but not:
    cd /etc/bind && ls *
or
    cd /etc/bind && ls *.signed

and the OSes are called Linux and BSD...  WTF?

It seems that a commandline can not have more then 31.000 characters.
(no not options but total lenght)

Thanks, Greetings and nice Day/Evening
    Michelle Konzack

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