282 lines
11 KiB
C++
282 lines
11 KiB
C++
/*****************************************************************************
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* smsub Server Manager Subprocess
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* Copyright (C) 2020 Syping
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* This software is provided as-is, no warranties are given to you, we are not
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* responsible for anything with use of the software, you are self responsible.
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*****************************************************************************/
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#include <QCommandLineParser>
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#include <QCommandLineOption>
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#include <QCoreApplication>
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#include <QJsonDocument>
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#include <QJsonObject>
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#include <QTextStream>
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#include <QJsonValue>
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#include <QJsonArray>
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#include <QFileInfo>
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#include <QFile>
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#include "SMSubProcess.h"
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#include "SMSubServer.h"
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#include "smsub.h"
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#ifdef Q_OS_UNIX
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#include <initializer_list>
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#include "signal.h"
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#include "unistd.h"
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#endif
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#ifdef Q_OS_UNIX
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void catchUnixSignals(std::initializer_list<int> quitSignals) {
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auto handler = [](int sig) -> void {
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QString unixSignal;
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switch (sig) {
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case SIGINT:
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unixSignal = QLatin1String("SIGINT");
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break;
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case SIGHUP:
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unixSignal = QLatin1String("SIGHUP");
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break;
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case SIGQUIT:
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unixSignal = QLatin1String("SIGQUIT");
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break;
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case SIGTERM:
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unixSignal = QLatin1String("SIGTERM");
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break;
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default:
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unixSignal = QString::number(sig);
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}
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QTextStream(stderr) << "Received Unix signal: " << unixSignal << endl;
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QCoreApplication::quit();
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};
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sigset_t blocking_mask;
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sigemptyset(&blocking_mask);
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for (int sig : quitSignals)
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sigaddset(&blocking_mask, sig);
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struct sigaction sa;
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sa.sa_handler = handler;
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sa.sa_mask = blocking_mask;
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sa.sa_flags = 0;
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for (int sig : quitSignals)
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sigaction(sig, &sa, nullptr);
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}
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#endif
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int main(int argc, char *argv[])
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{
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QCoreApplication a(argc, argv);
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a.setApplicationName("Server Manager Subprocess");
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a.setApplicationVersion("0.2.1");
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#ifdef Q_OS_UNIX
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catchUnixSignals({SIGINT, SIGHUP, SIGQUIT, SIGTERM});
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#endif
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QCommandLineParser commandLineParser;
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commandLineParser.addHelpOption();
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commandLineParser.addVersionOption();
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QCommandLineOption processManifest("json", "JSON process manifest.", "json");
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commandLineParser.addOption(processManifest);
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QCommandLineOption processExecutable(QStringList() << "exec" << "executable", "Process executable to run.", "exec");
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commandLineParser.addOption(processExecutable);
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QCommandLineOption processArguments(QStringList() << "args" << "arguments", "Arguments given to process.", "args");
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commandLineParser.addOption(processArguments);
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#ifdef Q_OS_WIN
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QCommandLineOption subprocessSocket(QStringList() << "sock" << "socket", "IPC socket used for local communication.", "sock");
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#else
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QCommandLineOption subprocessSocket(QStringList() << "sock" << "socket", "Unix socket used for local communication.", "sock");
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#endif
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commandLineParser.addOption(subprocessSocket);
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#ifdef Q_OS_WIN
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QCommandLineOption subprocessRemoteSocket(QStringList() << "rsock" << "rsocket", "IPC socket used for remote communication.", "rsock");
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#else
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QCommandLineOption subprocessRemoteSocket(QStringList() << "rsock" << "rsocket", "Unix socket used for remote communication.", "rsock");
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#endif
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commandLineParser.addOption(subprocessRemoteSocket);
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QCommandLineOption processTimeout("timeout", "SMSub termination timeout.", "timeout");
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commandLineParser.addOption(processTimeout);
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commandLineParser.process(a);
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if (unlikely(commandLineParser.isSet(processManifest) && commandLineParser.isSet(processExecutable))) {
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QTextStream(stderr) << "You can't define a Process executable and a JSON process manifest at the same time!" << endl;
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return 1;
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}
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bool timeoutSet = false;
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int termTimeout = 60000;
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if (unlikely(commandLineParser.isSet(processTimeout))) {
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bool ok;
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const int _termTimeout = commandLineParser.value(processTimeout).toInt(&ok);
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if (ok) {
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termTimeout = _termTimeout;
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timeoutSet = true;
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}
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}
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QString executable;
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QString workingDirectory;
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QStringList argumentList;
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if (likely(commandLineParser.isSet(processManifest))) {
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QFile manifestFile(commandLineParser.value(processManifest));
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if (likely(manifestFile.open(QIODevice::ReadOnly))) {
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const QByteArray jsonData = manifestFile.readAll();
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QJsonDocument jsonDocument = QJsonDocument::fromJson(jsonData);
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QJsonObject jsonObject = jsonDocument.object();
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if (likely(jsonObject.contains("Executable"))) {
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const QJsonValue jsonExecutable = jsonObject.value("Executable");
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if (unlikely(!jsonExecutable.isString())) {
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QTextStream(stderr) << "Executable is not a string in manifest, aborting!" << endl;
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manifestFile.close();
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return 1;
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}
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executable = jsonExecutable.toString();
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}
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else {
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QTextStream(stderr) << "Executable is not defined in manifest, aborting!" << endl;
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manifestFile.close();
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return 1;
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}
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if (likely(jsonObject.contains("WorkingDirectory"))) {
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const QJsonValue jsonWorkingDirectory = jsonObject.value("WorkingDirectory");
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if (unlikely(!jsonWorkingDirectory.isString())) {
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QTextStream(stderr) << "Working Directory is not a string in manifest, aborting!" << endl;
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manifestFile.close();
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return 1;
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}
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workingDirectory = jsonWorkingDirectory.toString();
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}
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else {
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workingDirectory = QFileInfo(executable).absolutePath();
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}
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if (likely(jsonObject.contains("Arguments"))) {
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const QJsonValue jsonArguments = jsonObject.value("Arguments");
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if (likely(jsonArguments.isArray())) {
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const QJsonArray jsonArray = jsonArguments.toArray();
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QJsonArray::const_iterator it = jsonArray.constBegin();
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QJsonArray::const_iterator end = jsonArray.constEnd();
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while (it != end) {
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argumentList << it->toString();
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it++;
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}
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}
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else {
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QTextStream(stderr) << "Arguments is not a array in manifest, aborting!" << endl;
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manifestFile.close();
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return 1;
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}
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}
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if (unlikely(!timeoutSet && jsonObject.contains("TerminationTimeout"))) {
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const QJsonValue jsonTimeout = jsonObject.value("TerminationTimeout");
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if (unlikely(!jsonTimeout.isDouble())) {
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termTimeout = qRound(jsonTimeout.toDouble());
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}
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else {
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QTextStream(stderr) << "Termination Timeout is not a number in manifest, aborting!" << endl;
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return 1;
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}
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}
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manifestFile.close();
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}
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}
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else if (unlikely(commandLineParser.isSet(processArguments))) {
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QTextStream(stderr) << "Arguments over command line are not supported yet!" << endl;
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return 1;
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}
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QString socket;
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if (likely(commandLineParser.isSet(subprocessSocket))) {
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socket = commandLineParser.value(subprocessSocket);
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}
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else {
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#ifdef Q_OS_WIN
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QTextStream(stderr) << "You must define at least a local IPC socket!" << endl;
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#else
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QTextStream(stderr) << "You must define at least a local Unix socket!" << endl;
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#endif
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return 1;
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}
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SMSubServerSettings localSettings;
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localSettings.isLocal = true;
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SMSubServer subLocal(&localSettings, socket);
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if (unlikely(!subLocal.isListening())) {
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#ifdef Q_OS_WIN
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QTextStream(stderr) << "Failed to start local IPC socket!" << endl;
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#else
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QTextStream(stderr) << "Failed to start local Unix socket!" << endl;
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#endif
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return 1;
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}
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QString rsocket;
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if (unlikely(commandLineParser.isSet(subprocessRemoteSocket))) {
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rsocket = commandLineParser.value(subprocessRemoteSocket);
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}
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SMSubServerSettings remoteSettings;
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remoteSettings.canRegister = false;
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remoteSettings.isLocal = false;
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SMSubServer subRemote(&remoteSettings, rsocket);
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if (unlikely(!rsocket.isEmpty())) {
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if (unlikely(!subRemote.isListening())) {
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#ifdef Q_OS_WIN
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QTextStream(stderr) << "Failed to start remote IPC socket!" << endl;
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#else
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QTextStream(stderr) << "Failed to start remote Unix socket!" << endl;
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#endif
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return 1;
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}
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localSettings.canRegister = true;
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}
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else {
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localSettings.canRegister = false;
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}
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SMSubProcess subProcess(executable, argumentList, workingDirectory, termTimeout);
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QObject::connect(&subProcess, &SMSubProcess::outputWritten, &subLocal, &SMSubServer::writeOutput);
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QObject::connect(&subLocal, &SMSubServer::inputWritten, &subProcess, &SMSubProcess::writeInput);
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QObject::connect(&subLocal, &SMSubServer::killRequested, &subProcess, &SMSubProcess::killProcess);
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QObject::connect(&subLocal, &SMSubServer::stopRequested, &subProcess, &SMSubProcess::stopProcess);
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QObject::connect(&a, &QCoreApplication::aboutToQuit, &subProcess, &SMSubProcess::aboutToQuit);
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if (unlikely(!rsocket.isEmpty())) {
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QObject::connect(&subLocal, &SMSubServer::tokenRegistered, &subRemote, &SMSubServer::registerToken);
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QObject::connect(&subProcess, &SMSubProcess::outputWritten, &subRemote, &SMSubServer::writeOutput);
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QObject::connect(&subRemote, &SMSubServer::inputWritten, &subProcess, &SMSubProcess::writeInput);
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QObject::connect(&subRemote, &SMSubServer::killRequested, &subProcess, &SMSubProcess::killProcess);
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QObject::connect(&subRemote, &SMSubServer::stopRequested, &subProcess, &SMSubProcess::stopProcess);
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}
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subProcess.start();
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return a.exec();
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}
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