From 763512795d8bdecae97962f2eadbc67624e40d32 Mon Sep 17 00:00:00 2001
From: bowgotsai <bowgotsai@google.com>
Date: Tue, 14 Feb 2017 22:06:20 +0800
Subject: [PATCH] Set libavb version into system property for Treble OTA

Treble allows framework-only (system.img) OTA. To libavb statically
linked in init/fs_mgr cannot parse the AVB metadata of system.img, add
this property for the Treble OTA match process.

Bug: 35236019
Test: Normal boots, use 'adb shell getprop' to check the property is set.
Test: Recovery boots, press 'Mount system' and use 'adb shell getprop'
      to check the property is set

Change-Id: I552be229c4efd45088d93252ac67176606f75d4d
---
 init/init.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/init/init.cpp b/init/init.cpp
index 9c1e23bba..7f7eb2f00 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -47,6 +47,7 @@
 #include <cutils/iosched_policy.h>
 #include <cutils/list.h>
 #include <cutils/sockets.h>
+#include <libavb/libavb.h>
 #include <private/android_filesystem_config.h>
 
 #include <fstream>
@@ -959,6 +960,9 @@ int main(int argc, char** argv) {
         property_set("ro.boottime.init", getenv("INIT_STARTED_AT"));
         property_set("ro.boottime.init.selinux", getenv("INIT_SELINUX_TOOK"));
 
+        // Set libavb version for Framework-only OTA match in Treble build.
+        property_set("ro.boot.init.avb_version", std::to_string(AVB_MAJOR_VERSION).c_str());
+
         // Clean up our environment.
         unsetenv("INIT_SECOND_STAGE");
         unsetenv("INIT_STARTED_AT");