Qt：Windows编程—Qt实现进程管理

r囧r小猫 2022-03-25 12:26 805阅读 0赞

# 前言 #

继续学window编程，学呀学呀 学无止境，学到Windows进程相关API了。利用相关的API使用Qt写界面实现了一个简单的进程管理。主要用到 进程的创建、进程的枚举、线程的枚举、DLL的枚举、进程提权等功能。相关API的介绍可以看 [C/C++：Windows编程—创建进程、终止进程、枚举进程、枚举线程、枚举DLL][C_C_Windows_DLL]

# 界面 #

先看看qt写的界面吧。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5NTQyNjEx_size_16_color_FFFFFF_t_70]

# 代码 #

## 创建进程 ##

// 创建进程
    void Widget::on_pushButton_6_clicked()
    {
    
        QFileDialog *fileDialog = new QFileDialog(this);
        fileDialog->setWindowTitle(tr("打开可执行文件"));
        fileDialog->setDirectory(".");
        fileDialog->setNameFilter(tr("可执行文件(*.exe)"));
        fileDialog->setViewMode(QFileDialog::Detail);
        QStringList fileNames;
        if(fileDialog->exec())
        {
            QString fileName;
            fileNames =  fileDialog->selectedFiles();
        }
        QString exePath = fileNames[0];
        qDebug() << exePath;
    
        const char* path = exePath.toStdString().c_str();
        STARTUPINFOA startInfo = {0};
        startInfo.cb = sizeof(startInfo);
        PROCESS_INFORMATION processInfo = {0};
        // startInfo 和 processInfo必须初始化
        BOOL ret = CreateProcessA(path,NULL,NULL,NULL,false,NULL
                      ,NULL,NULL,&startInfo,&processInfo);
        if( ret )
        {
            qDebug() << "processId = " << processInfo.dwProcessId << ",threadId = "<< processInfo.dwThreadId ;
            CloseHandle( processInfo.hProcess );
            CloseHandle( processInfo.hThread );
            emit refreshProcTab();
        }else
        {
            qDebug() << "创建进程失败" ;
        }
    
    }

## 结束进程 ##

// 结束进程
    void Widget::on_pushButton_clicked()
    {
    
        int row = ui->processTab->currentRow();
        uint pid = getPid();
    
        HANDLE hProc = OpenProcess(PROCESS_ALL_ACCESS,FALSE,pid); // 获取进程句柄
        if( hProc == NULL)
        {
            qDebug() << "OpenProcess error ";
            return;
        }
        BOOL ret = TerminateProcess(hProc,0); // 强制进程退出
        if(ret == FALSE)
        {
            qDebug() << "TerminateProcess error ";
            return ;
        }
        ui->processTab->removeRow(row);
        CloseHandle(hProc);
    }

## 停止进程 ##

// 停止进程，就是将进程中的所有线程挂起
    void Widget::on_pushButton_2_clicked()
    {
        uint pid = getPid();
        HANDLE snapHandele = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD,NULL);
        if( INVALID_HANDLE_VALUE == snapHandele)
        {
            qDebug() << "CreateToolhelp32Snapshot error" ;
            return;
        }
        THREADENTRY32 entry = {0};
        entry.dwSize = sizeof(entry);
        BOOL ret = Thread32First(snapHandele,&entry);
        while( ret )
        {
            if( entry.th32OwnerProcessID == pid)
            {
    
                HANDLE tHandle = OpenThread(THREAD_ALL_ACCESS,FALSE,entry.th32ThreadID);
                if( tHandle == NULL)
                {
                    qDebug() << "OpenThread error，threadId = " << entry.th32ThreadID;
                }
                else
                {
                    DWORD ret = SuspendThread(tHandle);
                    if( ret == -1)
                    {
                        qDebug() << "SuspendThread error";
                    }else
                    {
                        qDebug() << "SuspendThread success";
                    }
                    CloseHandle(tHandle);
                }
            }
            ret = Thread32Next(snapHandele,&entry);
        }
        CloseHandle(snapHandele);
    }

## 恢复进程 ##

// 恢复进程，就是将进程中的所有线程恢复
    void Widget::on_pushButton_3_clicked()
    {
        uint pid = getPid();
        HANDLE snapHandele = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD,NULL);
        if( INVALID_HANDLE_VALUE == snapHandele)
        {
            qDebug() << "CreateToolhelp32Snapshot error" ;
            return;
        }
        THREADENTRY32 entry = {0};
        entry.dwSize = sizeof(entry);
        BOOL ret = Thread32First(snapHandele,&entry);
        while( ret )
        {
            if( entry.th32OwnerProcessID == pid)
            {
    
                HANDLE tHandle = OpenThread(THREAD_ALL_ACCESS,FALSE,entry.th32ThreadID);
                if( tHandle == NULL)
                {
                    qDebug() << "OpenThread error，threadId = " << entry.th32ThreadID;
                }
                else
                {
                    DWORD ret = ResumeThread(tHandle);
                    if( ret == -1)
                    {
                        qDebug() << "SuspendThread error";
                    }else
                    {
                        qDebug() << "ResumeThread success";
                    }
                    CloseHandle(tHandle);
                }
            }
            ret = Thread32Next(snapHandele,&entry);
        }
    }

## 查看DLL ##

// 查看进程的DLL
    // 查看某些系统进程的DLL是不行的，调用CreateToolhelp32Snapshot直接失败
    // 必须提权，提权操作在upRole函数中
    void Widget::on_pushButton_4_clicked()
    {
        // 清空表格
        int rowCount = ui->dllTab->rowCount();
        for( int i = 0; i < rowCount; i++ )
        {
            ui->dllTab->removeRow(0);
        }
        uint pid = getPid();
    
    
        HANDLE snapHandele = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE ,pid);
        if( INVALID_HANDLE_VALUE == snapHandele)
        {
            qDebug() << "CreateToolhelp32Snapshot error" ;
            return;
        }
        MODULEENTRY32 entry = {0};
        entry.dwSize = sizeof(entry);// 长度必须赋值
        BOOL ret = Module32First(snapHandele,&entry);
        int i = 0;
        while (ret) {
            QString dllFile = QString::fromWCharArray(entry.szModule);
            QString dllPath = QString::fromWCharArray(entry.szExePath);
            ui->dllTab->insertRow(i);
            ui->dllTab->setItem(i,0,new QTableWidgetItem(dllFile));
            ui->dllTab->setItem(i,1,new QTableWidgetItem(QString("%1").arg(dllPath)));
            i++;
            ret = Module32Next(snapHandele,&entry);
        }
        CloseHandle(snapHandele);
    }

# 完整工程 #

工程代码在这里[可以下载][Link 1]。或者这里[下载最新代码][Link 2]。

[C_C_Windows_DLL]: https://blog.csdn.net/qq_29542611/article/details/86567304
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5NTQyNjEx_size_16_color_FFFFFF_t_70]: /images/20220325/f5b281c2d06f4c999ec04b15ca00b9de.png
[Link 1]: https://download.csdn.net/download/qq_29542611/10929302
[Link 2]: https://github.com/licongxing/ProcessManager