AU: Catch terminate signals and block exit if necessary.

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 <base/at_exit.h>
 #include <base/command_line.h>
 #include <base/logging.h>
 #include <base/string_util.h>
 #include <gflags/gflags.h>
 #include <glib.h>
 #include <metrics/metrics_library.h>
 #include <sys/types.h>
 #include <sys/stat.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/terminator.h"
 #include "update_engine/update_attempter.h"
 #include "update_engine/update_check_scheduler.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,
@@ skipping 53 matching lines @@
 
 }  // namespace chromeos_update_engine
 
 #include "update_engine/subprocess.h"
 
 int main(int argc, char** argv) {
   ::g_type_init();
   g_thread_init(NULL);
   dbus_g_thread_init();
   base::AtExitManager exit_manager;  // Required for base/rand_util.h.
+  chromeos_update_engine::Terminator::Init();
   chromeos_update_engine::Subprocess::Init();
   google::ParseCommandLineFlags(&argc, &argv, true);
   CommandLine::Init(argc, argv);
   logging::InitLogging("/var/log/update_engine.log",
                        (FLAGS_logtostderr ?
                         logging::LOG_ONLY_TO_SYSTEM_DEBUG_LOG :
                         logging::LOG_ONLY_TO_FILE),
                        logging::DONT_LOCK_LOG_FILE,
                        logging::APPEND_TO_OLD_LOG_FILE);
   if (!FLAGS_foreground)
@@ skipping 41 matching lines @@
   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;
 }