Date: Sat, 27 Sep 2008 22:45:27 -0500 From: Eric Schuele <e.schuele@computer.org> To: Len Conrad <LConrad@Go2France.com> Cc: freebsd-questions@freebsd.org Subject: Re: help with AWk Message-ID: <48DEFDD7.1010908@computer.org> In-Reply-To: <200809280458484.SM01744@TX2.Go2France.com> References: <200809280458484.SM01744@TX2.Go2France.com>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --]
On 09/27/2008 22:06, Len Conrad wrote:
> The logic desired if
>
> If IP has no PTR, print "PTR_NUL", else print the PTR.
>
>
> dig +short -x 1.2.3.4 | awk '{if ( $0 == "" ) {print "PTR_NUL" } else {print $0 } }'
>
> ... works if PTR exist, but if no PTR, PTR_NUL doesn't print.
A workaround that does the trick...
printf "dug `dig +short -x 1.2.3.4`" | awk '{if ( NF == 1 ) {print
"PTR_NUL" } else {print $2 } }'
>
> thanks
> Len
>
>
>
>
>
> ______________________________________________
> IMGate OpenSource Mail Firewall www.IMGate.net
>
> _______________________________________________
> freebsd-questions@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
>
>
--
Regards,
Eric
[-- Attachment #2 --]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (FreeBSD)
iEUEARECAAYFAkje/dcACgkQngSDRM3IXUp9igCguwpQjnhZG2wfdph9s1qKFD6I
77kAmLs/98+ZDYvHaouu2LY8CEPK+EY=
=EE91
-----END PGP SIGNATURE-----
help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?48DEFDD7.1010908>