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Re: [Qemu-devel] libvirt doesn't work with qemu 1.0

From: Anthony Liguori
Subject: Re: [Qemu-devel] libvirt doesn't work with qemu 1.0
Date: Fri, 02 Dec 2011 09:15:23 -0600
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110831 Lightning/1.0b2 Thunderbird/3.1.13

On 12/02/2011 09:08 AM, Jiri Denemark wrote:
On Fri, Dec 02, 2011 at 08:50:11 -0600, Anthony Liguori wrote:
On 12/02/2011 08:21 AM, Gerd Hoffmann wrote:

$subject says all.  The error message is:

error: internal error cannot parse /home/kraxel/bin/qemu-default version
number in 'QEMU emulator version 1.0, Copyright (c) 2003-2008 Fabrice

Parsing help output for the version number is a really bad idea.  query-version
in QMP does the right thing:

(QEMU) query-version
{u'return': {u'qemu': {u'micro': 0, u'major': 1, u'minor': 0}, u'package': ''}}

Which of course only works with new enough QEMU that is known to support QMP
(which BTW we detect by checking the version number).

Or you could just try the -qmp option and if QEMU exits, it doesn't support it. That's going to be a lot more reliable than checking a version number.


Anthony Liguori

Anyway, the fix is easy,
we just need to assume micro is 0 if it's missing instead of requiring it to
be present. A fix will come soon.


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