[libvirt] Which symbols can be used in file paths in libvirt's XMLs?

Dmitry Guryanov dguryanov at virtuozzo.com
Thu Jul 2 15:40:05 UTC 2015

On 07/01/2015 07:36 PM, Daniel P. Berrange wrote:
> On Wed, Jul 01, 2015 at 07:22:33PM +0300, Dmitry Guryanov wrote:
>> Hello,
>> There is an absFilePatch type in docs/schemas/basictypes.rng rng schema:
>>    <define name="absFilePath">
>>      <data type="string">
>>        <param
>> name="pattern">/[a-zA-Z0-9_\.\+\-\\&"'<>/%,:]+</param>
>>      </data>
>>    </define>
>> There are quite few symbols in this set of the ones, which linux allows to
>> have in file paths. For example spaces or curly braces are not allowed.
>> There are a lot of elements of this type in other rng schems, for example:
> [snip]
>> So the question is, where did this path pattern come from? Is it possible to
>> use file paths with another symbols or there will be some problems?
> I think this regex pattern is a bit of a misguided attempt to perform
> semantic validation on the XML content. I'd probably be inclined to
> simplify it to '/.*' and just delegate all other validation to drivers
> as they desire.

Thanks, Daniel. I've sent a patch, which changes rng scheme.

> Regards,
> Daniel

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