[libvirt] [PATCH v2 5/6] virsh: Report errors from stream callbacks

[Daniel P. Berrange]

On Thu, Jun 01, 2017 at 02:02:13PM +0200, Michal Privoznik wrote:
> There are couple of callbacks we pass to virStreamSendAll(),
> virStreamRecvAll() or its sparse variants. However, none of these
> callbacks reports error if one occurs and neither do the
> virStream* functions leaving user with very unhelpful error
> message:
> 
>   error: cannot receive data from volume fedora.img
>   error: An error occurred, but the cause is unknown

If we change the code to honour errno set in the callbacks,
we only need to deal with ensuring  virFileInData sets
the errno correctly.


Regards,
Daniel
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