Date: Thu, 24 Jun 2010 12:52:48 +0800 From: Aiza <aiza21@comclark.com> To: questions@freebsd.org Subject: Re: .sh check for numeric content Message-ID: <4C22E4A0.1040206@comclark.com> In-Reply-To: <4C22C816.3000105@comclark.com> References: <4C22B3D7.6070102@comclark.com> <20100624013755.GA5009@gothschlampen.com> <4C22C816.3000105@comclark.com>
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Aiza wrote: > Thomas wrote: >> On Thu, Jun 24, 2010 at 09:24:39AM +0800, Aiza wrote: >> >> Hello, >> >>> Receiving a variable from the command line that is suppose >>> to contain numeric values. >>> >>> How do I code a test to verify the content is numeric? >> >> http://www.google.com/search?q=shell+test+if+variable+numeric >> >> First link => >> http://www.unix.com/shell-programming-scripting/46276-check-variable-if-its-non-numeric.html >> >> >> Gosh, Google is full of answers these days.. >> > > yea but none of them are for freebsd style .sh shell > > > I'm, using > > [ "${dup_times}" != [0-9] ] && exerr "value not numeric" > > and get the errot messahe no mater what value is in dup_times. > > What is wrong with this code? > > Tried this suggestion from a reply and it worked. Only valid numeric value is whole numbers. if expr "${dup_times}" : "[0-9]*$" then echo "value is numeric" else echo "value is not numeric" fi But when I tried this format [ expr "${dup_times}" : "[0-9]*$" ] || echo "value is not numeric" I get the error message no mater what the value is. What am I doing wrong?
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