blob: 1dd7e809b6704a96ff7fd90573f2124de5a60d80 [file] [log] [blame]
/**
* Copyright © 2016 IBM 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 <iostream>
#include <string>
#include <systemd/sd-event.h>
#include <phosphor-logging/log.hpp>
#include "argument.hpp"
#include "monitor.hpp"
using namespace phosphor::logging;
static void exitWithError(const char* err, char** argv)
{
phosphor::gpio::ArgumentParser::usage(argv);
std::cerr << "ERROR: " << err << "\n";
exit(EXIT_FAILURE);
}
int main(int argc, char** argv)
{
// Read arguments.
auto options = phosphor::gpio::ArgumentParser(argc, argv);
// Parse out path argument.
auto path = (options)["path"];
if (path == phosphor::gpio::ArgumentParser::emptyString)
{
exitWithError("path not specified.", argv);
}
// Parse out key number that we are interested in
// Its integer mapping to the GPIO key configured by the kernel
auto key = (options)["key"];
if (key == phosphor::gpio::ArgumentParser::emptyString)
{
exitWithError("Key not specified.", argv);
}
// Parse out assertion polarity interested in
// Its either 1 or 0 for press / release
auto polarity = (options)["polarity"];
if (polarity == phosphor::gpio::ArgumentParser::emptyString)
{
exitWithError("Polarity not specified.", argv);
}
// Parse out target argument. It is fine if the caller does not
// pass this if they are not interested in calling into any target
// on meeting a condition.
auto target = (options)["target"];
sd_event* event = nullptr;
auto r = sd_event_default(&event);
if (r < 0)
{
log<level::ERR>("Error creating a default sd_event handler");
return r;
}
phosphor::gpio::EventPtr eventP{event};
event = nullptr;
// Create a monitor object and let it do all the rest
phosphor::gpio::Monitor monitor(path, std::stoi(key),
std::stoi(polarity), target, eventP);
// Wait for client requests until this application has processed
// at least one expected GPIO state change
while(!monitor.completed())
{
// -1 denotes wait for ever
r = sd_event_run(eventP.get(), (uint64_t)-1);
if (r < 0)
{
log<level::ERR>("Failure in processing request",
entry("ERROR=%s", strerror(-r)));
break;
}
}
return 0;
}