blob: 4c9f2734d75d12b4235ef22c356e141e53c046cd [file] [log] [blame]
/**
* Copyright 2017 Google Inc.
*
* 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 <cstdint>
#include <cstdio>
#include <experimental/filesystem>
#include <lpcsnoop/snoop_listen.hpp>
#include <string>
static const char* device_node_path;
namespace fs = std::experimental::filesystem;
static void DisplayDbusValue(postcode_t postcodes)
{
auto postcode = std::get<primary_post_code_t>(postcodes);
// Uses cstdio instead of streams because the device file has
// very strict requirements about the data format and streaming
// abstractions tend to muck it up.
FILE* f = std::fopen(device_node_path, "r+");
if (f)
{
int rc = std::fprintf(f, "%d%02x\n", (postcode > 0xff),
static_cast<uint8_t>(postcode & 0xff));
if (rc < 0)
{
std::fprintf(stderr, "failed to write 7seg value: rc=%d\n", rc);
}
std::fflush(f);
std::fclose(f);
}
}
/*
* This is the entry point for the application.
*
* This application simply creates an object that registers for incoming value
* updates for the POST code dbus object.
*/
int main(int argc, const char* argv[])
{
if (argc != 2 || !fs::exists(argv[1]))
{
std::fprintf(stderr, "usage: %s <device_node>\n", argv[0]);
return -1;
}
device_node_path = argv[1];
auto ListenBus = sdbusplus::bus::new_default();
std::unique_ptr<lpcsnoop::SnoopListen> snoop =
std::make_unique<lpcsnoop::SnoopListen>(ListenBus, DisplayDbusValue);
while (true)
{
ListenBus.process_discard();
ListenBus.wait();
}
return 0;
}