Date: Tue, 18 Dec 2012 20:17:33 +0000 From: RW <rwmaillists@googlemail.com> To: freebsd-questions@freebsd.org Subject: Re: using AWK Message-ID: <20121218201733.06f78f1f@gumby.homeunix.com> In-Reply-To: <18B0C79B-AF04-48D1-AF26-1B8A8B3641C1@fisglobal.com> References: <1355744359.61103.YahooMailNeo@web160104.mail.bf1.yahoo.com> <18B0C79B-AF04-48D1-AF26-1B8A8B3641C1@fisglobal.com>
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On Mon, 17 Dec 2012 08:16:26 -0800
Devin Teske wrote:
>
> On Dec 17, 2012, at 3:39 AM, Jack Mc Lauren wrote:
>
> > Hi guys
> >
> > How can I read a file which contains a number and assign that
> > number to a variable via awk programming? By the way, I want to use
> > this awk program in a shell script.
> >
> > Thanks in advance
>
> Try this:
>
> awk -v file=/etc/ttys 'BEGIN { getline line <file; printf "First line
> from %s: %s\n", file, line }'
>
Semms a bit complicated when you could set the awk variable directly
e.g.
$ echo 42 > /tmp/f
$ awk -v x=`cat /tmp/f` 'BEGIN{ print x+1 }'
43
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