KVM test: kvm_utils.load_env(): do not fail if env file is corrupted

- Include the unpickling code in the 'try' block, so that an exception raised
  during unpickling will not fail the test.
- Change the default env (returned by load_env() when the file is missing or
  corrupt) to {}.

Signed-off-by: Michael Goldish <mgoldish@redhat.com>


git-svn-id: http://test.kernel.org/svn/autotest/trunk@4320 592f7852-d20e-0410-864c-8624ca9c26a4
diff --git a/client/tests/kvm/kvm_utils.py b/client/tests/kvm/kvm_utils.py
index 78da9f1..0d92d79 100644
--- a/client/tests/kvm/kvm_utils.py
+++ b/client/tests/kvm/kvm_utils.py
@@ -22,7 +22,7 @@
     file.close()
 
 
-def load_env(filename, default=None):
+def load_env(filename, default={}):
     """
     Load KVM test environment from an environment file.
 
@@ -30,11 +30,13 @@
     """
     try:
         file = open(filename, "r")
+        obj = cPickle.load(file)
+        file.close()
+        return obj
+    # Almost any exception can be raised during unpickling, so let's catch
+    # them all
     except:
         return default
-    obj = cPickle.load(file)
-    file.close()
-    return obj
 
 
 def get_sub_dict(dict, name):