Init: Start Update Engine at startup

src/platform/update_engine/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 "chromeos/obsolete_logging.h"
 #include "update_engine/dbus_constants.h"
 #include "update_engine/dbus_service.h"
 #include "update_engine/update_attempter.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(forground, false,

[Chris Masone, 2010/05/10 22:46:52]

foreground

+            "Don't daemon()ize; run in forground.");
 
 using std::string;
 using std::tr1::shared_ptr;
 using std::vector;
 
 namespace chromeos_update_engine {
 
 namespace {
 
 struct PeriodicallyUpdateArgs {
@@ skipping 53 matching lines @@
   dbus_g_thread_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_forground)

[Chris Masone, 2010/05/10 22:46:52]

foreground

+    PLOG_IF(FATAL, daemon(0, 0) == 1) << "daemon() failed";
+
   LOG(INFO) << "Chrome OS Update Engine starting";
   
   // Create the single GMainLoop
   GMainLoop* loop = g_main_loop_new(g_main_context_default(), FALSE);
 
   // Create the update attempter:
   chromeos_update_engine::UpdateAttempter update_attempter;
 
   // Create the dbus service object:
   dbus_g_object_type_install_info(UPDATE_ENGINE_TYPE_SERVICE,
@@ skipping 22 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;
 }