commit ee016ce0b3cecde031c1d5463edcc1473b63bc39
author Mark Salyzyn <salyzyn@google.com> Thu May 23 10:00:34 2019 -0700
committer Mark Salyzyn <salyzyn@google.com> Fri Feb 14 13:24:16 2020 -0800
tree 0b01b80c4c976d97be3f2e42789cef7bc179a51b
parent e6f2b7d884761cf67d2de2829216e52779a01e9c

bootstat: enhance last reboot reason property with file backing

Helps with support of recovery and rollback boot reason history, by
also using /metadata/bootstat/persist.sys.boot.reason to file the
reboot reason.

Test: manual
Bug: 129007837
Change-Id: Id1d21c404067414847bef14a0c43f70cafe1a3e2

init/reboot.cpp

diff --git a/init/reboot.cpp b/init/reboot.cpp
index 38e8227..97d40b7 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -548,6 +548,7 @@
         skip = strlen("reboot,");
     }
     SetProperty(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
+    WriteStringToFile(reason.c_str() + skip, LAST_REBOOT_REASON_FILE);
     sync();
 
     bool is_thermal_shutdown = cmd == ANDROID_RB_THERMOFF;