[ILUG] POTD reminder

[P at draigBrady.com]

kevin lyda wrote:
> On Mon, Dec 13, 2004 at 04:07:38PM +0000, P at draigBrady.com wrote:
> 
>>Shell conditionals
>>
>>if [ "$str" = "1" ] || [ "$int" -eq "1" ]; then
>>     echo "str or int is 1"
>>elif [ "$int" -lt "10" ] && [ -e "file" ]; then
>>     echo "int less than 10 and file exists"
>>fi
> 
> 
> it's better if you do the following:
> 
>     if [ X"$str" = X"1" ] || [ "$int" -eq "1" ]; then
>         echo "str or int is 1"
>     elif [ "$int" -lt "10" ] && [ -e "file" ]; then
>         echo "int less than 10 and file exists"
>     fi
> 
> that way if $str begins with a - it won't annoy test.

Apart from that X"$str" trick looking horrible,
it's unecessary from my testing. test and the
builtin [ seem to be clever enough to parse options
only when appropriate.

-- 
Pádraig Brady - http://www.pixelbeat.org
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