commit 2997173235e88c5e4cb13d2844f74afc7b25d6e2
author Shuqian Zhao <shuqianz@google.com> Fri Feb 05 11:29:32 2016 -0800
committer Charlene Zhao <shuqianz@google.com> Wed Feb 10 22:38:45 2016 +0000
tree 1efea76748ffcb44c7340c8cae9d9cbfb51cc19e
parent 64d9878470aa7b388e971862181daf6260851602

Add a feature to get the last UpdateAttempt ErrorCode from update_engine

For autotest, update_engine test failures are always hard to debug,
since the error message is not clear. Add a new flag 'last_attempt_error'
to get the last UpdateAttempt ErrorCode from update_engine.

Bug:25598547
Test:emerge-peppy update_engine
     emerge-peppy update_engine_client
     cros flash a test image to DUT.
     (on the DUT):update_engine_client --last_attempt_error
     Compare the results with the update_engine logs, matched.

Change-Id: Id12681097ed30b0826cad68809f17f934a07e5b2

UpdateEngine.conf

diff --git a/UpdateEngine.conf b/UpdateEngine.conf
index 8a91607..9cf6042 100644
--- a/UpdateEngine.conf
+++ b/UpdateEngine.conf
@@ -54,6 +54,9 @@
     <allow send_destination="org.chromium.UpdateEngine"
            send_interface="org.chromium.UpdateEngineInterface"
            send_member="GetPrevVersion"/>
+    <allow send_destination="org.chromium.UpdateEngine"
+           send_interface="org.chromium.UpdateEngineInterface"
+           send_member="GetLastAttemptError"/>
     <allow send_interface="org.chromium.UpdateEngineLibcrosProxyResolvedInterface" />
   </policy>
   <policy user="power">