[Qemu-devel] [PATCH v7 09/11] qemu.py: launch vm only if it's not running

From: Amador Pahim <apahim@redhat.com>
To: qemu-devel@nongnu.org
Cc: stefanha@gmail.com, famz@redhat.com, berrange@redhat.com,
	ehabkost@redhat.com, mreitz@redhat.com, kwolf@redhat.com,
	armbru@redhat.com, crosa@redhat.com, ldoktor@redhat.com,
	Amador Pahim <apahim@redhat.com>
Subject: [Qemu-devel] [PATCH v7 09/11] qemu.py: launch vm only if it's not running
Date: Fri, 18 Aug 2017 19:05:24 +0200	[thread overview]
Message-ID: <20170818170526.13496-10-apahim@redhat.com> (raw)
In-Reply-To: <20170818170526.13496-1-apahim@redhat.com>

A new call to launch() with a running VM will fall in exception and
consequently call shutdown().

This patch makes launch() to raise an exception when it's called with VM
already running.

Signed-off-by: Amador Pahim <apahim@redhat.com>
---
 scripts/qemu.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/qemu.py b/scripts/qemu.py
index 9ae65e454e..46e8ff3232 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -170,6 +170,9 @@ class QEMUMachine(object):
         self._iolog = None
         self._qemu_full_args = None
         devnull = open(os.path.devnull, 'rb')
+        if self.is_running():
+            raise QEMULaunchError('VM already running')
+
         try:
             self._pre_launch()
             self._qemu_full_args = (self._wrapper + [self._binary] +
-- 
2.13.5
