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Re: [libvirt] [PATCH libguestfs 4/4] launch: Add libvirt backend.

On Sat, Jul 21, 2012 at 08:20:49PM +0100, Richard W.M. Jones wrote:
> +
> +  /* Connect to libvirt, get capabilities. */
> +  /* XXX Support libvirt authentication in the future. */
> +  conn = virConnectOpen (libvirt_uri);
> +  if (!conn) {
> +    error (g, _("could not connect to libvirt: URI: %s"),
> +           libvirt_uri ? : "NULL");
> +    goto cleanup;
> +  }

Authentication is a tricky one. If your STDIN is a tty, then
you could use OpenAuth() passing in virConnectAuthPtrDefault,
to get the default text-mode auth prompt.

If you are running in a GUI app though, there needs to be
some way to graphically collect credentials, which means
libguestfs would probably need to expose a callback API
kinda like the libvirt auth callbacks.

Alternatively you could just say to hell with it, and require
the application to pass in a pre-opened virConnectPtr that
you use. This is actually quite desirable, since it will avoid
the user having to authenticate multiple times, when the app
already has an open connection

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