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Date: Mon, 07 Jun 2010 18:04:24 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: [Qemu-devel] Re: [PATCH 19/19] Add a -capabilities argument to
 allow easy query for static QEMU info
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To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: qemu-devel@nongnu.org

On 06/07/2010 04:42 PM, Daniel P. Berrange wrote:
> The QMP monitor provides a number of commands for querying info about
> the QEMU binary capabilities. Given that these commands don't take
> any options and just return static data, requiring the use of QMP is
> unnecessarily onerous. This adds a new '-capabilities' command line
> argument as a syntactic sugar for accessing the QMP commands that
> just return static QEMU binary capabilities.
>
> Setting the '-capabilities' argument causes QEMU to output the requested
> data on stdout, pretty printed in JSON format. The argument expects an
> associated value to identify the data to be printed. This can be one of
> the strings version|machines|devices|cputypes|target|commands|argv|netdev
>
> To query all possible data at once, the shorthand 'all' is allowed.
>
> The output is a QDict where the key is the type of data requested, and
> the value is the JSON data from the associated monitor command. For
> example:

A lot of this patch and the other monitor.c changes you had can likely 
be moved in a capabilities.c file?

Paolo