summary refs log tree commit diff stats
path: root/tests/qemu-iotests/iotests.py
diff options
context:
space:
mode:
Diffstat (limited to 'tests/qemu-iotests/iotests.py')
-rw-r--r--tests/qemu-iotests/iotests.py9
1 files changed, 6 insertions, 3 deletions
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 6bcddd8870..f11482f3dc 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -209,9 +209,9 @@ def qemu_nbd(*args):
     '''Run qemu-nbd in daemon mode and return the parent's exit code'''
     return subprocess.call(qemu_nbd_args + ['--fork'] + list(args))
 
-def qemu_nbd_pipe(*args):
+def qemu_nbd_early_pipe(*args):
     '''Run qemu-nbd in daemon mode and return both the parent's exit code
-       and its output'''
+       and its output in case of an error'''
     subp = subprocess.Popen(qemu_nbd_args + ['--fork'] + list(args),
                             stdout=subprocess.PIPE,
                             stderr=subprocess.STDOUT,
@@ -221,7 +221,10 @@ def qemu_nbd_pipe(*args):
         sys.stderr.write('qemu-nbd received signal %i: %s\n' %
                          (-exitcode,
                           ' '.join(qemu_nbd_args + ['--fork'] + list(args))))
-    return exitcode, subp.communicate()[0]
+    if exitcode == 0:
+        return exitcode, ''
+    else:
+        return exitcode, subp.communicate()[0]
 
 def compare_images(img1, img2, fmt1=imgfmt, fmt2=imgfmt):
     '''Return True if two image files are identical'''