Re: [Qemu-devel] [QEMU-1.6 & QEMU-Upstream PATCH] vl.c: Output error on invalid machine type provided

["Daniel P. Berrange" <berrange@redhat.com>]

On Thu, Sep 05, 2013 at 01:36:09PM +0200, Michal Novotny wrote:
> Output error message using qemu's error_report() function when user
> provides the invalid machine type on the command line. This also saves
> time to find what issue is when you downgrade from one version of qemu
> to another that doesn't support required machine type yet (the version
> user downgraded to have to have this patch applied too, of course).
> 
> (This has been posted a while ago and reviewed however not applied yet
>  so this is basically just a reminder e-mail to ask for pushing it.
>  It also applies cleanly to QEMU-1.6 so I'm sending to qemu-stable as
>  well.)
> 
> Signed-off-by: Michal Novotny <minovotn@redhat.com>
> ---
>  vl.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/vl.c b/vl.c
> index f422a1c..9b4a3f9 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2671,6 +2671,11 @@ static QEMUMachine *machine_parse(const char *name)
>      if (machine) {
>          return machine;
>      }
> +
> +    if (name && !is_help_option(name)) {
> +        error_report("Unsupported machine type");
> +    }

It would be nicer to do

     error_report("Unsupported machine type '%s'", name);


So when people report error messages in bugs / mailing lists, without
providing their CLI args, it'll be obvious what they requested.

Daniel
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