[Libvir] Record an error when refusing a read-only operation

[Daniel P. Berrange]

On Wed, Aug 16, 2006 at 10:57:16AM -0400, Daniel Veillard wrote:
> On Wed, Aug 16, 2006 at 03:30:30PM +0100, Daniel P. Berrange wrote:
> > The libvirt.c front-end can be compiled in 'pedantic' mode in which case it
> > explicitly refuses operations with side-effects in read-only connections. 
> > When doing so, however, it was not recording any error message so feedback
> > to the user was misleading / obsure. This patch adds an extra error code
> > VIR_ERR_READ_ONLY which is used when an operation is denied due to a read
> > only connection.
> 
>   argh, I developped a similar patch independantly, using 
> "VIR_ERR_OPERATION_DENIED" instead, it also reports the operation name
> and drop the #ifdef PEDANTIC , making it the default behaviour.

Resolving my changes with the ones you committed was pretty trivial so its
committed now.

> > This patch also passes 'VIR_DRV_OPEN_QUIET' to the 'open' method so tell
> > the XenD driver not complain if it fails to open a HV connection. This is
> > because it was complaining whenever trying to open a test:///default 
> > connection.
> 
>   That should not conflict, yeah it's probably better to have the libvirt
> front-end function report the connection error than letting the drivers
> emit errors themselves. The only problem is that you won't detect hypervisor
> connection failure say if you manage to connect with xend, because at least
> one access method succeeded ...

Ok, this is committed.

Dan,
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