Date: Mon, 17 Dec 2012 03:39:19 -0800 (PST) From: Jack Mc Lauren <jack.mclauren@yahoo.com> To: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: using AWK Message-ID: <1355744359.61103.YahooMailNeo@web160104.mail.bf1.yahoo.com>
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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 From owner-freebsd-questions@FreeBSD.ORG Mon Dec 17 12:00:25 2012 Return-Path: <owner-freebsd-questions@FreeBSD.ORG> Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id DFB5962F for <freebsd-questions@freebsd.org>; Mon, 17 Dec 2012 12:00:25 +0000 (UTC) (envelope-from tamino@wolfhut.org) Received: from pendor.wolfhut.org (pendor.wolfhut.org [173.228.91.225]) by mx1.freebsd.org (Postfix) with ESMTP id C185E8FC0C for <freebsd-questions@freebsd.org>; Mon, 17 Dec 2012 12:00:25 +0000 (UTC) Received: from [192.168.42.100] (173-228-91-224.static.sonic.net [173.228.91.224]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by pendor.wolfhut.org (Postfix) with ESMTPSA id E598DDBB32; Mon, 17 Dec 2012 03:52:56 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 6.2 \(1499\)) Subject: Re: using AWK From: Ben Cottrell <tamino@wolfhut.org> In-Reply-To: <1355744359.61103.YahooMailNeo@web160104.mail.bf1.yahoo.com> Date: Mon, 17 Dec 2012 03:52:56 -0800 Content-Transfer-Encoding: 7bit Message-Id: <8EA88B4E-9C21-4CF7-9AB0-87663AB876F8@wolfhut.org> References: <1355744359.61103.YahooMailNeo@web160104.mail.bf1.yahoo.com> To: Jack Mc Lauren <jack.mclauren@yahoo.com> X-Mailer: Apple Mail (2.1499) Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Mon, 17 Dec 2012 12:00:25 -0000 Hi Jack, On Dec 17, 2012, at 03:39, Jack Mc Lauren <jack.mclauren@yahoo.com> wrote: > 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. I'm actually not sure what you're asking, exactly -- you want the number to go into an awk variable? Or a shell variable? Assuming you want it to go into an awk variable, I would try something like this: getline my_number < filename; close filename; That assumes the filename is stored in the variable named "filename". It puts the number in the awk variable named "my_number". To put that in context, let's say you're getting the filename from $0, and you want to multiply the number by 2 and print it. You might do: filename = $0; getline my_number < filename; close filename; print my_number * 2; Or if I completely misinterpreted your question, let me know :-) ~Ben
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