try this:
if [[ $VAL2 =~ ^[A-Fa-f0-9]*$ ]] ; then
echo is hex
else
echo is not hex
fi
2014-09-18 17:34 GMT-05:00 Fred Smith <fredex@xxxxxxxxxxxxxxxxxxxxxx>:
> On Thu, Sep 18, 2014 at 04:31:03PM -0500, Chris Kottaridis wrote:
>> In a bash shell script I want to see if a string has nothing but
>> hexadecimal values in it.
>>
>> So:
>>
>> A098FE or af098fe
>>
>> should be true
>>
>> hello
>>
>> should not.
>>
>> How do I check for that ?
>>
>> I've been playing with
>>
>> if [[ $val =~ '/^[A-Fa-f0-9]+$/' ]] ; then
>> echo is hex
>> else
>> echo is not hex
>> fi
>>
>> I've tried various incantations of above and also tried using grep
>> but can't seem to get it just right.
>>
>> Any help appreciated.
>
> Have you looked in the Advanced Bash Scripting guide? I dunno if
> it discusses that particular thing, but there is a lot of tricky
> stuff there that may help you.
>
> http://tldp.org/LDP/abs/html/
>
> --
> ---- Fred Smith -- fredex@xxxxxxxxxxxxxxxxxxxxxx -----------------------------
> "For the word of God is living and active. Sharper than any double-edged
> sword, it penetrates even to dividing soul and spirit, joints and marrow;
> it judges the thoughts and attitudes of the heart."
> ---------------------------- Hebrews 4:12 (niv) ------------------------------
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