Parse postinstall parameters from the payload metadata.
Payload v2 includes a description of the post-install command it should
run, while in payload v1 we use the default values. This patch mounts
the partition on the new top-level directory called /postinstall that
should already be created.
Bug: 27177071
TEST=FEATURES=test emerge-link update_engine
Change-Id: Iaedf3b01e5e1ad57c68bd316b4b6e79cbab35bb6
diff --git a/common/constants.cc b/common/constants.cc
index 6b1d416..fc6df37 100644
--- a/common/constants.cc
+++ b/common/constants.cc
@@ -29,6 +29,8 @@
const char kStatefulPartition[] = "/mnt/stateful_partition";
+const char kPostinstallDefaultScript[] = "postinst";
+
// Constants defining keys for the persisted state of update engine.
const char kPrefsAttemptInProgress[] = "attempt-in-progress";
const char kPrefsBackoffExpiryTime[] = "backoff-expiry-time";