[libvirt-users] libvirt printing to stderr

[Matthias Bolte]

2010/12/13 Osier Yang <jyang at redhat.com>:
> 于 2010年12月13日 13:43, Albert Hopkins 写道:
>>
>> I'm writing an app and using the Python bindings for libvirt.
>>
>> Everything is fine but, in some cases I need to call lookupByName().
>> There are a lot of times when the name will not exist, I trap the
>> exception, however I still get this message printed to stderr:
>>
>> libvir: QEMU error : Domain not found: no domain with matching name
>> 'foo'
>>
>> Is there any way to turn this off?  This is a command-line program so
>> the extra output makes the interface confusing.
>>
>> I've tried re-assigning sys.stderr before calling lookupByName(), but
>> that doesn't seem to have any affect.
>>
>
> actually there is a bug for this problem, it should be warning, but not
> error, and will be fixed upstream soon.
>
> - Osier
>

Really? Why should this be a warning? When virDomainLookupByName()
fails because there is no domain with the given name then we need to
report an error. I don't see what could be changed there.

Albert, libvirt's default error handler prints to stderr, you can
override it like this:

    import libvirt

    def errorHandler(ctx, err):
        pass

    libvirt.registerErrorHandler(errorHandler, None)

Matthias