Date: Fri, 13 Aug 2010 09:28:12 -0700 From: merlyn@stonehenge.com (Randal L. Schwartz) To: lconrad@Go2France.com Cc: freebsd-questions@freebsd.org Subject: Re: awk problem Message-ID: <8639uipjdv.fsf@red.stonehenge.com> In-Reply-To: <201008131723.AA679149726@mail.Go2France.com> (Len Conrad's message of "Fri, 13 Aug 2010 17:23:06 %2B0200") References: <201008131723.AA679149726@mail.Go2France.com>
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>>>>> "Len" == Len Conrad <lconrad@Go2France.com> writes:
Len> I readfile or pipe this text, in any line order:
Len> rm90.steampick.info
Len> fgce172.lanejive.info
Len> smailer1.service.govdelivery.com
Len> fl49.orangetalon.info
Len> pollux.carespecial.info
Len> into a program to remove subdomains down to domain.tld :
Len> awk 'FS="." { print $(NF-1)"."$NF }'
Len> and get the first line doubled rather than processed like the other lines:
Len> rm90.steampick.info.rm90.steampick.info
Len> lanejive.info
Len> govdelivery.com
Len> orangetalon.info
Len> carespecial.info
Yes, that would be the expected behavior.
You need to set the FS *before* processing the first line.
Either use -F ., or a BEGIN block.
--
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