AU: call script to set boot flags on successful boot.

main.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 #include <tr1/memory>
 #include <vector>
 
 #include <gflags/gflags.h>
 #include <glib.h>
 
 #include "base/command_line.h"
 #include "base/logging.h"
+#include "base/string_util.h"
 #include "metrics/metrics_library.h"
 #include "update_engine/dbus_constants.h"
 #include "update_engine/dbus_service.h"
 #include "update_engine/prefs.h"
+#include "update_engine/subprocess.h"
 #include "update_engine/update_attempter.h"
 #include "update_engine/utils.h"
 
 extern "C" {
 #include "update_engine/update_engine.dbusserver.h"
 }
 
 DEFINE_bool(logtostderr, false,
             "Write logs to stderr instead of to a file in log_dir.");
 DEFINE_bool(foreground, false,
             "Don't daemon()ize; run in foreground.");
 
 using std::string;
 using std::tr1::shared_ptr;
 using std::vector;
 
 namespace chromeos_update_engine {
 
+gboolean UpdateBootFlags(void* arg) {
+  // This purely best effort. Failures should be logged by Subprocess.
+  int unused = 0;
+  vector<string> cmd(1, "/usr/sbin/chromeos-setgoodkernel");
+  Subprocess::SynchronousExec(cmd, &unused);
+  return FALSE;  // Don't call this callback again
+}
+
 namespace {
 
 gboolean UpdateOnce(void* arg) {
   UpdateAttempter* update_attempter = reinterpret_cast<UpdateAttempter*>(arg);
   update_attempter->Update("", "");
   return FALSE;
 }
 
 gboolean UpdatePeriodically(void* arg) {
   UpdateAttempter* update_attempter = reinterpret_cast<UpdateAttempter*>(arg);
@@ skipping 94 matching lines @@
   dbus_g_object_type_install_info(UPDATE_ENGINE_TYPE_SERVICE,
                                   &dbus_glib_update_engine_service_object_info);
   UpdateEngineService* service =
       UPDATE_ENGINE_SERVICE(g_object_new(UPDATE_ENGINE_TYPE_SERVICE, NULL));
   service->update_attempter_ = &update_attempter;
   update_attempter.set_dbus_service(service);
   chromeos_update_engine::SetupDbusService(service);
 
   chromeos_update_engine::SchedulePeriodicUpdateChecks(&update_attempter);
 
+  // Update boot flags after 45 seconds
+  g_timeout_add_seconds(45, &chromeos_update_engine::UpdateBootFlags, NULL);
+
   // Run the main loop until exit time:
   g_main_loop_run(loop);
 
   // Cleanup:
   g_main_loop_unref(loop);
   update_attempter.set_dbus_service(NULL);
   g_object_unref(G_OBJECT(service));
 
   LOG(INFO) << "Chrome OS Update Engine terminating";
   return 0;
 }