blob: 95cf911b8576357ae150b92386110fd7ef816c0d [file] [log] [blame]
// Copyright (c) 2012 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 <vector>
#include <base/at_exit.h>
#include <base/command_line.h>
#include <base/file_util.h>
#include <base/logging.h>
#include <base/strings/string_util.h>
#include <base/strings/stringprintf.h>
#include <gflags/gflags.h>
#include <glib.h>
#include <metrics/metrics_library.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "update_engine/certificate_checker.h"
#include "update_engine/dbus_constants.h"
#include "update_engine/dbus_service.h"
#include "update_engine/dbus_wrapper_interface.h"
#include "update_engine/real_system_state.h"
#include "update_engine/subprocess.h"
#include "update_engine/terminator.h"
#include "update_engine/update_attempter.h"
#include "update_engine/update_check_scheduler.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::vector;
namespace chromeos_update_engine {
gboolean UpdateBootFlags(void* arg) {
reinterpret_cast<UpdateAttempter*>(arg)->UpdateBootFlags();
return FALSE; // Don't call this callback again
}
gboolean BroadcastStatus(void* arg) {
reinterpret_cast<UpdateAttempter*>(arg)->BroadcastStatus();
return FALSE; // Don't call this callback again
}
gboolean UpdateEngineStarted(gpointer user_data) {
reinterpret_cast<UpdateAttempter*>(user_data)->UpdateEngineStarted();
return FALSE; // Remove idle source (e.g. don't do the callback again)
}
namespace {
void SetupDbusService(UpdateEngineService* service) {
DBusGConnection *bus;
DBusGProxy *proxy;
GError *error = nullptr;
bus = dbus_g_bus_get(DBUS_BUS_SYSTEM, &error);
LOG_IF(FATAL, !bus) << "Failed to get bus: "
<< utils::GetAndFreeGError(&error);
proxy = dbus_g_proxy_new_for_name(bus,
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS);
guint32 request_name_ret;
if (!org_freedesktop_DBus_request_name(proxy,
kUpdateEngineServiceName,
0,
&request_name_ret,
&error)) {
LOG(FATAL) << "Failed to get name: " << utils::GetAndFreeGError(&error);
}
if (request_name_ret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
g_warning("Got result code %u from requesting name", request_name_ret);
LOG(FATAL) << "Got result code " << request_name_ret
<< " from requesting name, but expected "
<< DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER;
}
dbus_g_connection_register_g_object(bus,
"/org/chromium/UpdateEngine",
G_OBJECT(service));
}
void SetupLogSymlink(const string& symlink_path, const string& log_path) {
// TODO(petkov): To ensure a smooth transition between non-timestamped and
// timestamped logs, move an existing log to start the first timestamped
// one. This code can go away once all clients are switched to this version or
// we stop caring about the old-style logs.
if (utils::FileExists(symlink_path.c_str()) &&
!utils::IsSymlink(symlink_path.c_str())) {
base::ReplaceFile(base::FilePath(symlink_path),
base::FilePath(log_path),
nullptr);
}
base::DeleteFile(base::FilePath(symlink_path), true);
if (symlink(log_path.c_str(), symlink_path.c_str()) == -1) {
PLOG(ERROR) << "Unable to create symlink " << symlink_path
<< " pointing at " << log_path;
}
}
string GetTimeAsString(time_t utime) {
struct tm tm;
CHECK(localtime_r(&utime, &tm) == &tm);
char str[16];
CHECK(strftime(str, sizeof(str), "%Y%m%d-%H%M%S", &tm) == 15);
return str;
}
string SetupLogFile(const string& kLogsRoot) {
const string kLogSymlink = kLogsRoot + "/update_engine.log";
const string kLogsDir = kLogsRoot + "/update_engine";
const string kLogPath =
base::StringPrintf("%s/update_engine.%s",
kLogsDir.c_str(),
GetTimeAsString(::time(nullptr)).c_str());
mkdir(kLogsDir.c_str(), 0755);
SetupLogSymlink(kLogSymlink, kLogPath);
return kLogSymlink;
}
void SetupLogging() {
logging::LoggingSettings log_settings;
log_settings.lock_log = logging::DONT_LOCK_LOG_FILE;
log_settings.delete_old = logging::APPEND_TO_OLD_LOG_FILE;
if (FLAGS_logtostderr) {
// Log to stderr initially.
log_settings.log_file = nullptr;
log_settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
} else {
const string log_file = SetupLogFile("/var/log");
log_settings.log_file = log_file.c_str();
log_settings.logging_dest = logging::LOG_TO_FILE;
}
logging::InitLogging(log_settings);
}
} // namespace {}
} // namespace chromeos_update_engine
int main(int argc, char** argv) {
::g_type_init();
dbus_threads_init_default();
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);
chromeos_update_engine::SetupLogging();
if (!FLAGS_foreground)
PLOG_IF(FATAL, daemon(0, 0) == 1) << "daemon() failed";
LOG(INFO) << "Chrome OS Update Engine starting";
// Ensure that all written files have safe permissions.
// This is a mask, so we _block_ execute for the owner, and ALL
// permissions for other users.
// Done _after_ log file creation.
umask(S_IXUSR | S_IRWXG | S_IRWXO);
// Create the single GMainLoop
GMainLoop* loop = g_main_loop_new(g_main_context_default(), FALSE);
chromeos_update_engine::RealSystemState real_system_state;
LOG_IF(ERROR, !real_system_state.Initialize())
<< "Failed to initialize system state.";
chromeos_update_engine::UpdateAttempter *update_attempter =
real_system_state.update_attempter();
CHECK(update_attempter);
// Sets static members for the certificate checker.
chromeos_update_engine::CertificateChecker::set_system_state(
&real_system_state);
chromeos_update_engine::OpenSSLWrapper openssl_wrapper;
chromeos_update_engine::CertificateChecker::set_openssl_wrapper(
&openssl_wrapper);
// Create the dbus service object:
dbus_g_object_type_install_info(UPDATE_ENGINE_TYPE_SERVICE,
&dbus_glib_update_engine_service_object_info);
UpdateEngineService* service = update_engine_service_new();
service->system_state_ = &real_system_state;
update_attempter->set_dbus_service(service);
chromeos_update_engine::SetupDbusService(service);
// Schedule periodic update checks.
chromeos_update_engine::UpdateCheckScheduler scheduler(update_attempter,
&real_system_state);
scheduler.Run();
// Update boot flags after 45 seconds.
g_timeout_add_seconds(45,
&chromeos_update_engine::UpdateBootFlags,
update_attempter);
// Broadcast the update engine status on startup to ensure consistent system
// state on crashes.
g_idle_add(&chromeos_update_engine::BroadcastStatus, update_attempter);
// Run the UpdateEngineStarted() method on |update_attempter|.
g_idle_add(&chromeos_update_engine::UpdateEngineStarted, update_attempter);
// Run the main loop until exit time:
g_main_loop_run(loop);
// Cleanup:
g_main_loop_unref(loop);
update_attempter->set_dbus_service(nullptr);
g_object_unref(G_OBJECT(service));
LOG(INFO) << "Chrome OS Update Engine terminating";
return 0;
}