Add /postinstall partition when using the A/B updater.
The new top level directory /postinstall is used by the A/B updater to
mount the new partition and run a post-install program before rebooting
into that new system.
init.rc was extended to label this new directory since the initrd has
no extended attributes.
Bug: 27177071
TEST=`ls -laZ /` shows the /postinstall directory on edison-eng
Change-Id: I6cdee7eb1d61ac7d447528962a4fad1a7bbf138d
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index d90f988..d53af2f 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -70,6 +70,11 @@
; mkdir -p $(dir $(TARGET_ROOT_OUT)/$(word 2,$(p))) \
; ln -sf $(word 1,$(p)) $(TARGET_ROOT_OUT)/$(word 2,$(p)))
endif
+# The A/B updater uses a top-level /postinstall directory to mount the new
+# system before reboot.
+ifeq ($(AB_OTA_UPDATER),true)
+ LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/postinstall
+endif
include $(BUILD_SYSTEM)/base_rules.mk
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 1f63fcf..2b12099 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -23,6 +23,9 @@
# Shouldn't be necessary, but sdcard won't start without it. http://b/22568628.
mkdir /mnt 0775 root system
+ # Set the security context of /postinstall if present.
+ restorecon /postinstall
+
start ueventd
on init