Add UpstartClient

chromeos/dbus/upstart_client.cc

+// Copyright 2016 The Chromium 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 "chromeos/dbus/upstart_client.h"
+
+#include "base/bind.h"
+#include "base/memory/weak_ptr.h"
+#include "dbus/bus.h"
+#include "dbus/message.h"
+#include "dbus/object_proxy.h"
+
+namespace chromeos {
+
+namespace {
+
+const char kUpstartServiceName[] = "com.ubuntu.Upstart";
+const char kUpstartJobInterface[] = "com.ubuntu.Upstart0_6.Job";
+const char kUpstartStartMethod[] = "Start";
+
+const char kUpstartAuthPolicyPath[] = "/com/ubuntu/Upstart/jobs/authpolicyd";
+
+class UpstartClientImpl : public UpstartClient {
+ public:
+  UpstartClientImpl() : weak_ptr_factory_(this) {}
+
+  ~UpstartClientImpl() override {}
+
+  // UpstartClient override.
+  void StartAuthPolicyService() override {
+    dbus::ObjectPath objectPath(kUpstartAuthPolicyPath);
+    dbus::ObjectProxy* proxy =
+        bus_->GetObjectProxy(kUpstartServiceName, objectPath);
+    dbus::MethodCall method_call(kUpstartJobInterface, kUpstartStartMethod);
+    dbus::MessageWriter writer(&method_call);
+    writer.AppendArrayOfStrings(std::vector<std::string>());
+    writer.AppendBool(true);  // Wait for response.
+    proxy->CallMethod(&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
+                      base::Bind(&UpstartClientImpl::HandleStartResponse,
+                                 weak_ptr_factory_.GetWeakPtr()));
+  }
+
+ protected:
+  void Init(dbus::Bus* bus) override { bus_ = bus; }
+
+ private:
+  void HandleStartResponse(dbus::Response* response) {
+    LOG_IF(ERROR, !response) << "Failed to signal Upstart, response is null";
+  }
+
+  dbus::Bus* bus_ = nullptr;
+
+  // Note: This should remain the last member so it'll be destroyed and
+  // invalidate its weak pointers before any other members are destroyed.
+  base::WeakPtrFactory<UpstartClientImpl> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(UpstartClientImpl);
+};
+
+}  // namespace
+
+UpstartClient::UpstartClient() {}
+
+UpstartClient::~UpstartClient() {}
+
+// static
+UpstartClient* UpstartClient::Create() {
+  return new UpstartClientImpl();
+}
+
+}  // namespace chromeos