Implement phosphor-buttons based C++ and sdbusplus interfaces.

This phosphor-buttons module handles all the physical buttons
like Reset/Power/ID button pressed/released signals and the
simulate signals on button pressed/released in WebUI.

All the signals are exposed into dbus and let other
modules be aware.

Change-Id: I52144718ef54d403c5221e5afd0216b9494f8523
Signed-off-by: Kuiying Wang <kuiying.wang@intel.com>
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..bd4ec2a
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,68 @@
+/*
+// Copyright (c) 2018 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include "reset_button.hpp"
+#include "power_button.hpp"
+#include "id_button.hpp"
+
+int main(int argc, char* argv[])
+{
+    int ret = 0;
+
+    phosphor::logging::log<phosphor::logging::level::INFO>(
+        "Start power button service...");
+
+    sd_event* event = nullptr;
+    ret = sd_event_default(&event);
+    if (ret < 0)
+    {
+        phosphor::logging::log<phosphor::logging::level::ERR>(
+            "Error creating a default sd_event handler");
+        return ret;
+    }
+    EventPtr eventP{event};
+    event = nullptr;
+
+    sdbusplus::bus::bus bus = sdbusplus::bus::new_default();
+    sdbusplus::server::manager::manager objManager{
+        bus, "/xyz/openbmc_project/Chassis/Buttons"};
+
+    bus.request_name("xyz.openbmc_project.Chassis.Buttons");
+
+    PowerButton powerButton{bus, POWER_DBUS_OBJECT_NAME, eventP};
+
+    ResetButton resetButton{bus, RESET_DBUS_OBJECT_NAME, eventP};
+
+    IDButton idButton{bus, ID_DBUS_OBJECT_NAME, eventP};
+
+    try
+    {
+        bus.attach_event(eventP.get(), SD_EVENT_PRIORITY_NORMAL);
+        ret = sd_event_loop(eventP.get());
+        if (ret < 0)
+        {
+            phosphor::logging::log<phosphor::logging::level::ERR>(
+                "Error occurred during the sd_event_loop",
+                phosphor::logging::entry("RET=%d", ret));
+        }
+    }
+    catch (std::exception& e)
+    {
+        phosphor::logging::log<phosphor::logging::level::ERR>(e.what());
+        ret = -1;
+    }
+    return ret;
+}