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From: Giorgos Keramidas <keramida@freebsd.org>
To: chris scott <kraduk@googlemail.com>
References: <d36406630907210146m4e84c7dbpd55776168a50090c@mail.gmail.com>
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	<d36406630907210424p3e9e77c8tf12ab26da0573c89@mail.gmail.com>
Date: Tue, 21 Jul 2009 14:35:51 +0300
In-Reply-To: <d36406630907210424p3e9e77c8tf12ab26da0573c89@mail.gmail.com>
	(chris scott's message of "Tue, 21 Jul 2009 12:24:09 +0100")
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Cc: Polytropon <freebsd@edvax.de>, freebsd-questions@freebsd.org
Subject: Re: backticks in rc.conf
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On Tue, 21 Jul 2009 12:24:09 +0100, chris scott <kraduk@googlemail.com> wrote:
>
> a=`echo $ifconfig_bge0 | /usr/bin/awk '{ for ( i=1 ; i <= NF; i++) { if ( $i
> ~ /[iI][nN][eE][tT]/ ) { sub(/\/.*/,"", $(i+1)); print $(i+1) } } }'`
> rsyncd_flags="--config=/etc/rsyncd.conf --address=$a"

This is far too complex for my taste.  If you are certain that you will
have all the tools around (/usr /usr/local and so on), then it may be
simpler to use something like:

  addr=$( ifconfig lagg0 | perl -ne 'print "$1\n" if (m/^.*inet\s+(\S+)\s.*$/);' )

This seems to work without all the looping/sub in awk:

  $ ifconfig lagg0 | perl -ne 'print "$1\n" if (m/^.*inet\s+(\S+)\s.*$/);'
  192.168.1.3