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[Qemu-devel] [PATCH 5/9] qtest.py: Support QTEST_LOG environment variabl

From: Eduardo Habkost
Subject: [Qemu-devel] [PATCH 5/9] qtest.py: Support QTEST_LOG environment variable
Date: Mon, 16 Jan 2017 23:02:00 -0200

qtest logs everything to stderr by default, but we don't want it
to be the default behavior on test cases.

Implement the same behavior of libqtest.c, and redirect the qtest
log to /dev/null by default unless the QTEST_LOG environment
variable is set.

Signed-off-by: Eduardo Habkost <address@hidden>
Patch originally submitted as part of series:
* [RFC v2 00/20] qmp: Report bus information on 'query-machines'
 scripts/qtest.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/qtest.py b/scripts/qtest.py
index d5aecb5f49..5ac2c69ba8 100644
--- a/scripts/qtest.py
+++ b/scripts/qtest.py
@@ -88,8 +88,14 @@ class QEMUQtestMachine(qemu.QEMUMachine):
         self._qtest_path = os.path.join(test_dir, name + "-qtest.sock")
     def _base_args(self):
+        if os.getenv('QTEST_LOG'):
+            qtest_log = '/dev/fd/2'
+        else:
+            qtest_log = '/dev/null'
         args = super(QEMUQtestMachine, self)._base_args()
         args.extend(['-qtest', 'unix:path=' + self._qtest_path,
+                     '-qtest-log', qtest_log,
                      '-machine', 'accel=qtest'])
         return args

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