Qt编写守护进程

#pragma execution_character_set("utf-8") #include "frmmain.h" #include "ui_frmmain.h" #include "qtimer.h" #include "qudpsocket.h" #include "qsharedmemory.h" #include "qprocess.h" #include "qdatetime.h" #include "qapplication.h" #include "qdesktopservices.h" #include "qmessagebox.h" #if (QT_VERSION > QT_VERSION_CHECK(5,0,0)) #include "qstandardpaths.h" #endif #include "app.h" frmMain::frmMain(QWidget *parent) : QWidget(parent), ui(new Ui::frmMain) { ui->setupUi(this); this->initForm(); } frmMain::~frmMain() { delete ui; } void frmMain::changeEvent(QEvent *event) { //隐藏当前界面,最小化到托盘 if(event->type() == QEvent::WindowStateChange) { if(windowState() & Qt::WindowMinimized) { hide(); } } QWidget::changeEvent(event); } void frmMain::initForm() { count = 0; ok = false; //每秒钟定时询问心跳 timerHeart = new QTimer(this); timerHeart->setInterval(2000); connect(timerHeart, SIGNAL(timeout()), this, SLOT(sendHearData())); //从6050端口开始,如果绑定失败则将端口加1,直到绑定成功 udp = new QUdpSocket(this); int port = 6050; while(!udp->bind(port)) { port++; } connect(udp, SIGNAL(readyRead()), this, SLOT(readData())); if (App::TargetAppName.isEmpty()) { ui->btnStart->setText("启动"); ui->btnStart->setEnabled(false); timerHeart->stop(); } else { ui->btnStart->setText("暂停"); ui->btnStart->setEnabled(true); timerHeart->start(); } ui->txtAppName->setText(App::TargetAppName); ui->txtAppName->setFocus(); } void frmMain::sendHearData() { udp->writeDatagram("hello", QHostAddress::LocalHost, App::TargetAppPort); //判断当前是否没有回复 if (!ok) { count++; } else { count = 0; ok = false; } //如果超过规定次数没有收到心跳回复,则超时重启 if (count >= App::TimeoutCount) { timerHeart->stop(); QSharedMemory mem(App::TargetAppName); if (!mem.create(1)) { killApp(); } QTimer::singleShot(1000 , this, SLOT(killOther())); QTimer::singleShot(3000 , this, SLOT(startApp())); QTimer::singleShot(4000 , this, SLOT(startExplorer())); } } void frmMain::killApp() { QProcess *p = new QProcess; p->start(QString("taskkill /im %1.exe /f").arg(App::TargetAppName)); } void frmMain::killOther() { QProcess *p = new QProcess; p->start(QString("taskkill /im %1.exe /f").arg("WerFault")); //重建缓存,彻底清除托盘图标 if (App::ReStartExplorer) { QProcess *p1 = new QProcess; p1->start("taskkill /f /im explorer.exe"); } } void frmMain::startApp() { if (ui->btnStart->text() == "开始" || ui->btnStart->text() == "启动") { count = 0; return; } QProcess *p = new QProcess; p->start(QString("\"%1/%2.exe\"").arg(qApp->applicationDirPath()).arg(App::TargetAppName)); count = 0; ok = true; timerHeart->start(); App::ReStartCount++; App::ReStartLastTime = QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm:ss"); App::writeConfig(); ui->labCount->setText(QString("已重启 %1 次").arg(App::ReStartCount)); ui->labInfo->setText(QString("最后一次重启在 %1").arg(App::ReStartLastTime)); } void frmMain::startExplorer() { //取得操作系统目录路径,指定操作系统目录下的explorer程序,采用绝对路径,否则在64位操作系统下无效 #if (QT_VERSION > QT_VERSION_CHECK(5,0,0)) QString str = QStandardPaths::writableLocation(QStandardPaths::ApplicationsLocation); #else QString str = QDesktopServices::storageLocation(QDesktopServices::ApplicationsLocation); #endif if (App::ReStartExplorer) { str = QString("%1\\Windows\\explorer.exe").arg(str.mid(0, 2)); QProcess *p = new QProcess(this); p->start(str); } } void frmMain::readData() { QByteArray tempData; do { tempData.resize(udp->pendingDatagramSize()); udp->readDatagram(tempData.data(), tempData.size()); QString data = QLatin1String(tempData); if (data.right(2) == "OK") { count = 0; ok = true; } } while (udp->hasPendingDatagrams()); } void frmMain::on_btnOk_clicked() { App::TargetAppName = ui->txtAppName->text(); if (App::TargetAppName == "") { QMessageBox::critical(this, "提示", "应用程序名称不能为空!"); ui->txtAppName->setFocus(); return; } App::writeConfig(); ui->btnStart->setEnabled(true); } void frmMain::on_btnStart_clicked() { count = 0; if (ui->btnStart->text() == "暂停") { timerHeart->stop(); ui->btnStart->setText("开始"); } else { timerHeart->start(); ui->btnStart->setText("暂停"); } } void frmMain::on_btnReset_clicked() { App::ReStartCount = 0; App::ReStartLastTime = "2019-01-01 12:00:00"; App::writeConfig(); ui->txtAppName->setText(App::TargetAppName); ui->labCount->setText(QString("已重启 %1 次").arg(App::ReStartCount)); ui->labInfo->setText(QString("最后一次重启在 %1").arg(App::ReStartLastTime)); QMessageBox::information(this, "提示", "重置配置文件成功!"); }