Support GKI updates
Adds proper file_contexts and domains for pre/postinstall hooks.
Allow the pre/postinstall hooks to communicate with update_engine stable
service.
Bug: 161563386
Test: apply a GKI update
Change-Id: I4437aab8e87ccbe55858150b95f67ec6e445ac1f
diff --git a/private/gki_apex_prepostinstall.te b/private/gki_apex_prepostinstall.te
new file mode 100644
index 0000000..fa5cd14
--- /dev/null
+++ b/private/gki_apex_prepostinstall.te
@@ -0,0 +1,20 @@
+# GKI pre- & post-install hooks.
+#
+# Allow to run pre- and post-install hooks for GKI APEXes
+
+type gki_apex_prepostinstall, domain, coredomain;
+type gki_apex_prepostinstall_exec, system_file_type, exec_type, file_type;
+
+# Execute /system/bin/sh.
+allow gki_apex_prepostinstall shell_exec:file rx_file_perms;
+
+# Execute various toolsbox utilities.
+allow gki_apex_prepostinstall toolbox_exec:file rx_file_perms;
+
+# Allow preinstall.sh to execute update_engine_stable_client binary.
+allow gki_apex_prepostinstall gki_apex_prepostinstall_exec:file execute_no_trans;
+
+# Allow preinstall hook to communicate with update_engine to execute update.
+binder_use(gki_apex_prepostinstall)
+allow gki_apex_prepostinstall update_engine_stable_service:service_manager find;
+binder_call(gki_apex_prepostinstall, update_engine)