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From: merlyn@stonehenge.com (Randal L. Schwartz)
To: lconrad@Go2France.com
References: <201008131723.AA679149726@mail.Go2France.com>
x-mayan-date: Long count = 12.19.17.10.19; tzolkin = 1 Cauac; haab = 12 Yaxkin
Date: Fri, 13 Aug 2010 09:28:12 -0700
In-Reply-To: <201008131723.AA679149726@mail.Go2France.com> (Len Conrad's
	message of "Fri, 13 Aug 2010 17:23:06 +0200")
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Cc: freebsd-questions@freebsd.org
Subject: Re: awk problem
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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.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
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