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Re: if, -n <string>


From: coubeatczech
Subject: Re: if, -n <string>
Date: Sun, 1 Feb 2009 05:06:30 -0800 (PST)



Eric Blake wrote:
> 
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> 
> According to coubeatczech on 1/31/2009 7:24 AM:
>> address@hidden:~$ variable=
>> address@hidden:~$ if [ -n $variable ]; then echo true; fi
>> true
> 
> This is equivalent to 'if [ -n ]; then echo true; fi'; in other words,
> because there is only one argument ("-n"), and it is not empty, it is
> true.
> 
> You meant to use quotes, to guarantee that there are two arguments, as in:
> 
> if [ -n "$variable" ]; then echo true; fi
> 
> - --
> Don't work too hard, make some time for fun as well!
> 
> Eric Blake             address@hidden
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> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
> 
> iEYEARECAAYFAkmFCUMACgkQ84KuGfSFAYCU6ACgj4hHK1Cxuk/gwI6QPo6xU0Ng
> 6KIAoMx3sk6bvV8YHGssez2s2vT7s45e
> =VLoa
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> 
> 
> 
> 
Ok, thanks got it now
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