hyperion.ng/src/hyperiond/main.cpp

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#include <cassert>
#include <csignal>
#include <unistd.h>
#ifndef __APPLE__
/* prctl is Linux only */
#include <sys/prctl.h>
#endif
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#include <exception>
#include <QCoreApplication>
#include <QLocale>
#include <QFile>
#include <QString>
#include "HyperionConfig.h"
#include <utils/Logger.h>
#include <webconfig/WebConfig.h>
#include <commandline/Parser.h>
#include <commandline/IntOption.h>
#include "hyperiond.h"
using namespace commandline;
void signal_handler(const int signum)
{
QCoreApplication::quit();
// reset signal handler to default (in case this handler is not capable of stopping)
signal(signum, SIG_DFL);
}
void startNewHyperion(int parentPid, std::string hyperionFile, std::string configFile)
{
if ( fork() == 0 )
{
sleep(3);
execl(hyperionFile.c_str(), hyperionFile.c_str(), "--parent", QString::number(parentPid).toStdString().c_str(), configFile.c_str(), NULL);
exit(0);
}
}
int main(int argc, char** argv)
{
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// initialize main logger and set global log level
Logger* log = Logger::getInstance("MAIN");
Logger::setLogLevel(Logger::WARNING);
// Initialising QCoreApplication
QCoreApplication app(argc, argv);
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
signal(SIGCHLD, signal_handler);
signal(SIGPIPE, signal_handler);
// force the locale
setlocale(LC_ALL, "C");
QLocale::setDefault(QLocale::c());
Parser parser("Hyperion Daemon");
parser.addHelpOption();
BooleanOption & versionOption = parser.add<BooleanOption>(0x0, "version", "Show version information");
IntOption & parentOption = parser.add<IntOption>('p', "parent", "pid of parent hyperiond"); // 2^22 is the max for Linux
BooleanOption & silentOption = parser.add<BooleanOption>('s', "silent", "do not print any outputs");
BooleanOption & verboseOption = parser.add<BooleanOption>('v', "verbose", "Increase verbosity");
BooleanOption & debugOption = parser.add<BooleanOption>('d', "debug", "Show debug messages");
parser.addPositionalArgument("config-files", QCoreApplication::translate("main", "Configuration files"), "[files...]");
parser.process(app);
const QStringList configFiles = parser.positionalArguments();
int logLevelCheck = 0;
if (parser.isSet(silentOption))
{
Logger::setLogLevel(Logger::OFF);
logLevelCheck++;
}
if (parser.isSet(verboseOption))
{
Logger::setLogLevel(Logger::INFO);
logLevelCheck++;
}
if (parser.isSet(debugOption))
{
Logger::setLogLevel(Logger::DEBUG);
logLevelCheck++;
}
if (logLevelCheck > 1)
{
Error(log, "aborting, because options --silent --verbose --debug can't used together");
return 0;
}
if (parser.isSet(versionOption))
{
std::cout
<< "Hyperion Ambilight Deamon (" << getpid() << ")" << std::endl
<< "\tVersion : " << HYPERION_VERSION << " (" << HYPERION_BUILD_ID << ")" << std::endl
<< "\tBuild Time: " << __DATE__ << " " << __TIME__ << std::endl;
return 0;
}
if (configFiles.size() == 0)
{
Error(log, "Missing required configuration file. Usage: hyperiond <options ...> [config.file ...]");
return 1;
}
int parentPid = parser.value(parentOption).toInt();
if (parentPid > 0 )
{
Info(log, "hyperiond client, parent is pid %d", parentPid);
#ifndef __APPLE__
prctl(PR_SET_PDEATHSIG, SIGHUP);
#endif
}
int argvId = -1;
for(int idx=0; idx < configFiles.size(); idx++) {
if ( QFile::exists(configFiles[idx]))
{
if (argvId < 0) argvId=idx;
else startNewHyperion(getpid(), argv[0], configFiles[idx].toStdString());
}
}
if ( argvId < 0)
{
Error(log, "No valid config found");
return 1;
}
HyperionDaemon* hyperiond = nullptr;
try
{
hyperiond = new HyperionDaemon(configFiles[argvId], &app);
hyperiond->run();
}
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catch (std::exception& e)
{
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Error(log, "Hyperion Daemon aborted:\n %s", e.what());
}
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int rc = 1;
WebConfig* webConfig = nullptr;
try
{
webConfig = new WebConfig(&app);
// run the application
rc = app.exec();
Info(log, "INFO: Application closed with code %d", rc);
}
catch (std::exception& e)
{
Error(log, "Hyperion aborted:\n %s", e.what());
}
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// delete components
delete webConfig;
delete hyperiond;
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Logger::deleteInstance();
return rc;
}