wimlib-imagex是个第三方工具，可对系统映像进行操作，下载地址：
https://wimlib.net/downloads/index.html

程序主要用到以下这两个文件：libwim-15.dll和wimlib-imagex.exe

wimlib-imagex.exe的调用命令参数，可以通过cmd命令行wimlib-imagex --help进行查看，也可以自行百度。

系统备份：通过wimlib-imagex的capture命令，对指定系统盘进行捕获映像，生成wim文件。
系统还原：进入winPE系统，对指定系统盘进行格式化，再通过wimlib-imagex的apply命令，将之前备份的完整的wim文件应用到系统盘。

以下为涉及的部分参考代码：

SystemReloadObject.cpp

//系统备份
bool CSystemReloadObject::systemBackup(const QString& backupName, const QString& backupDesc)
{
    QString sourcePath = getSystemDrive();

    m_pThread->systemBackup(sourcePath, backupName, backupDesc);
    return true;
}

//系统还原
bool CSystemReloadObject::systemRestore(const QString& backupName, const int& index)
{
    m_pThread->systemRestore(backupName, index);
    return true;
}


//本地模式下载安装
bool CSystemReloadObject::systemPEDownload()
{
    m_pThread->systemPEDownload();
    return true;
}


//获取当前系统盘盘符
QString CSystemReloadObject::getSystemDrive()
{
    char str[MAX_PATH]{0};
    GetSystemDirectoryA(str, MAX_PATH);
    return QString::fromStdString(std::string(1, str[0]));
}


//获取当前系统版本
QString CSystemReloadObject::getSystemVersion()
{
    QString vname;
    //先判断是否为win8.1或win10
    typedef void(__stdcall* NTPROC)(DWORD*, DWORD*, DWORD*);
    HINSTANCE hinst = LoadLibrary(L"ntdll.dll");
    DWORD dwMajor, dwMinor, dwBuildNumber;
    NTPROC proc = (NTPROC)GetProcAddress(hinst, "RtlGetNtVersionNumbers");
    proc(&dwMajor, &dwMinor, &dwBuildNumber);
    if (dwMajor == 6 && dwMinor == 3)	//win 8.1
    {
        vname = "Microsoft Windows 8.1";
        return vname;
    }
    if (dwMajor == 10 && dwMinor == 0)	//win 10
    {
        vname = "Microsoft Windows 10";
        return vname;
    }

    //判断win8.1以下的版本
    SYSTEM_INFO info;                //用SYSTEM_INFO结构判断64位AMD处理器
    GetSystemInfo(&info);            //调用GetSystemInfo函数填充结构
    OSVERSIONINFOEX os;
    os.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
#pragma warning(disable:4996)
    int SystemVer = 0;
    if (GetVersionEx((OSVERSIONINFO*)&os))
    {

        //下面根据版本信息判断操作系统名称
        switch (os.dwMajorVersion)
        {                        //判断主版本号
        case 4:
            switch (os.dwMinorVersion)
            {                //判断次版本号
            case 0:
                if (os.dwPlatformId == VER_PLATFORM_WIN32_NT) {
                    vname = "Microsoft Windows NT 4.0";  //1996年7月发布
                    SystemVer = 40; // Windows NT 4.0
                }
                else if (os.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
                    vname = "Microsoft Windows 95";
                    SystemVer = 95;
                }

                break;
            case 10:
                vname = "Microsoft Windows 98";
                SystemVer = 41; // Windows 98
                break;
            case 90:
                vname = "Microsoft Windows Me";
                SystemVer = 42; // Windows Me
                break;
            }
            break;
        case 5:
            switch (os.dwMinorVersion)
            {               //再比较dwMinorVersion的值
            case 0:
                vname = "Microsoft Windows 2000";    //1999年12月发布
                SystemVer = 50; // Windows 2000
                break;
            case 1:
                vname = "Microsoft Windows XP";      //2001年8月发布
                SystemVer = 51; // Windows XP
                break;
            case 2:
                if (os.wProductType == VER_NT_WORKSTATION &&
                    info.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
                {
                    vname = "Microsoft Windows XP Professional x64 Edition";
                    SystemVer = 52;
                }
                else if (GetSystemMetrics(SM_SERVERR2) == 0)
                {
                    vname = "Microsoft Windows Server 2003";   //2003年3月发布
                    SystemVer = 53;
                }
                else if (GetSystemMetrics(SM_SERVERR2) != 0)
                {
                    vname = "Microsoft Windows Server 2003 R2";
                    SystemVer = 54;
                }

                break;
            }
            break;
        case 6:
            switch (os.dwMinorVersion)
            {
            case 0:
                if (os.wProductType == VER_NT_WORKSTATION)
                {
                    vname = "Microsoft Windows Vista";
                    SystemVer = 60; // Windows Vista
                }
                else {
                    vname = "Microsoft Windows Server 2008";   //服务器版本
                    SystemVer = 61; // Windows Server 2008
                }

                break;
            case 1:
                if (os.wProductType == VER_NT_WORKSTATION)
                {
                    vname = "Microsoft Windows 7";
                    SystemVer = 70; // Windows 7

                }
                else
                {
                    vname = "Microsoft Windows Server 2008 R2";
                    SystemVer = 71; // Windows Server 2008 R2
                }

                break;
            case 2:
                if (os.wProductType == VER_NT_WORKSTATION)
                {
                    vname = "Microsoft Windows 8";
                    SystemVer = 80; // Windows 8
                }

                else {
                    vname = "Microsoft Windows Server 2012";
                    SystemVer = 81; // Windows Server 2012
                }

                break;
            }
            break;
        default:
            vname = "未知操作系统";
            SystemVer = 0;
        }
    }
    else {
        printf_s("版本获取失败\n");
    }
    return vname;
}


//获取当前存在的备份
void CSystemReloadObject::getSystemBackup()
{
    QString backupPath = QDir::currentPath() + "/SystemBackup/";
    QDir dir(backupPath);
    QFileInfoList infolist = dir.entryInfoList();

    QJsonArray backupArray;
    foreach(auto it, infolist){
        if(it.suffix() == "wim" || it.suffix() == "WIM"){
            QJsonObject backupObj;
            backupObj.insert("name", it.absoluteFilePath());
            backupArray.append(backupObj);
        }
    }

    emit sigBackupInfo(backupArray);
}


//获取当前存在的有效备份的卷
void CSystemReloadObject::getSystemBackupImage(const QString& backupPath)
{
    //使用wimlib-imagex的info命令检验
    QString cmd = QString("\"%1/SystemReload/wimlib-imagex.exe\" info \"%2\"")
                      .arg(QDir::currentPath())
                      .arg(backupPath);

    QProcess process;
    process.start(cmd);
    process.waitForFinished();
    QByteArray all = process.readAll();
    QString strall = QString(all);
    int indexs = 0;

    if (!strall.contains("Available Images:")) {
        qDebug() << "此wim无效，无法进行还原";
    }else{
        qDebug() << "有可用的Images";

        int pos = strall.indexOf("Available Images:");
        strall = strall.mid(pos);
        indexs = strall.count("Index:");
    }

    //添加数据到model
    QJsonArray imageArray;
    for(int i=0; i<indexs; i++){
        QJsonObject imageObj;
        imageObj.insert("name", QString::number(i+1));
        imageArray.append(imageObj);
    }

    emit sigImageInfo(imageArray);
}


//检测当前系统是否是winPE环境
bool CSystemReloadObject::isCurrentWinPE()
{
    HKEY hkey = NULL;
    unsigned char buffer[260] = { 0 };
    unsigned long dwsize = sizeof(buffer);
    std::string strfind;

    unsigned long iret = RegOpenKeyExA(HKEY_LOCAL_MACHINE, "SYSTEM\\CurrentControlSet\\Control", 0, KEY_READ, &hkey);
    if (iret != ERROR_SUCCESS)
        return false;

    iret = RegQueryValueExA(hkey, "SystemStartOptions", NULL, NULL, buffer, &dwsize);
    if (iret != ERROR_SUCCESS)
    {
        RegCloseKey(hkey);
        return false;
    }

    RegCloseKey(hkey);// get registry keys.

    // next find '/MININT' flag.
    strfind.assign((char*)buffer);
    std::transform(strfind.begin(), strfind.end(), strfind.begin(), tolower);// to lowercase.
    if ((int)strfind.find("minint", 0) > -1){
        //是winPE
        emit sigDialogOperte(1);
        return true;
    }

    //不是winPE
    emit sigDialogOperte(2);
    return false;
}


//检查当前是否存在winPE
bool CSystemReloadObject::hasLocalWinPE()
{
    //判断系统BCD引导文件是否有winPE的引导菜单
    QString cmd = QString("bcdedit /enum");

    QStringList args;
    args << "/C" << cmd;

    QString program = "cmd.exe";

    QProcess process;
    process.start(program, args);
    process.waitForFinished();

    QByteArray all = process.readAll();
    QString strall = QString(all);
    if (strall.contains(LOCAL_WINPE_DEVICE_GUID) || strall.contains(LOCAL_WINPE_OSLOADER_GUID)) {
        qDebug() << "当前存在winpe本地模式";
        emit sigDialogOperte(3);
        return true;
    }

    emit sigDialogOperte(4);
    return false;
}




//打开备份文件位置
void CSystemReloadObject::openBackupFilePath()
{
    QString strPath = QDir::currentPath() + "/SystemBackup";
    strPath.replace("/", "\\");
    QProcess process;
    process.startDetached("explorer", QStringList() << QString("/select,") << QString("%1").arg(strPath));
}


//关闭线程启用的外部程序
void CSystemReloadObject::exitApp()
{
    m_pThread->killProcess();
}


//重启电脑
void CSystemReloadObject::restartComputer()
{
    QString cmd = "shutdown /r /t 0";

    QStringList args;
    args << "/C" << cmd;

    QString program = "cmd.exe";
    QProcess process;
    process.start(program, args);
    process.waitForFinished();
}

SystemReloadThread.cpp

void CSystemReloadThread::systemBackup(const QString& sourcePath, const QString& backupName, const QString& backupDesc)
{
    m_threadParams.clear();
    m_threadParams.append(sourcePath);
    m_threadParams.append(backupName);
    m_threadParams.append(backupDesc);

    m_memberFun = &CSystemReloadThread::systemBackup;
    this->start();
}

bool CSystemReloadThread::systemBackup(QVariantList params)
{
    //创建备份文件夹
    QDir tempDir(m_BackupFilePath);
    if (!tempDir.exists()) {
        if (!tempDir.mkpath(m_BackupFilePath)) {
            qDebug() << "failed to create backupDir";
            sigDialogResultThread(1,0);
            emit sigUpdateBtn(true);
            return false;
        }
    }

    QString filepath = m_BackupFilePath + params[1].toString() + ".wim";
    QFile wimFile(filepath);

    //不存在就采用捕获capture，存在就采用追加append
    if (!wimFile.exists()) {
        WimCapture(params[0].toString() + ":\\", m_BackupFilePath, params[1].toString(), params[2].toString()+"_"+getSystemDrive());
    }
    else {
        WimAppend(params[0].toString() + ":\\", m_BackupFilePath, params[1].toString(), params[2].toString()+"_"+getSystemDrive());
    }


    //判断进程结束后，是否已成功完成备份
    if ((m_DoingOutput.contains("Calculating integrity table for WIM") && m_DoingOutput.contains("(100%) done"))
        || (m_DoingOutput.contains("Archiving file data:") && m_DoingOutput.contains("(100%) done"))) {
        qDebug() << "备份成功完成";
        emit sigDialogResultThread(1,1);
        emit sigUpdateBtn(true);
        return true;
    }else if(m_DoingOutput.contains("ERROR: Exiting with error code")){
        qDebug()<< "系统备份失败";
        emit sigDialogResultThread(1,0);
        emit sigUpdateBtn(true);
        return false;
    }


    return false;
}


void CSystemReloadThread::systemRestore(const QString& backupName, const int& index)
{
    m_threadParams.clear();
    m_threadParams.append(backupName);
    m_threadParams.append(index);

    m_memberFun = &CSystemReloadThread::systemRestore;
    this->start();
}

bool CSystemReloadThread::systemRestore(QVariantList params)
{

    //winPE的系统盘可能和windows10下不同，因此此处需要从备份文件的描述中获取系统盘
    //使用wimlib-imagex的info命令检验
    QString cmd = QString("\"%1/SystemReload/wimlib-imagex.exe\" info \"%2\"")
          .arg(QDir::currentPath())
          .arg(params[0].toString());

    QProcess process;
    process.start(cmd);
    process.waitForFinished();
    QByteArray all = process.readAll();
    QString strall = QString(all);
    QString systemDrive;


    if (!strall.contains("Available Images:")) {
        qDebug() << "此wim无效，无法进行还原";
    }
    else {
        qDebug() << "有可用的Images";

        int pos = strall.indexOf("Description:");
        strall = strall.mid(pos);
        pos = strall.indexOf("\r\n");
        systemDrive = strall.mid(pos - 1, 1);
    }


    //在winPE环境中，先格式化系统盘
    if(FormatVolume(systemDrive, "NTFS")){
        qDebug()<< "格式化成功";
    }else{
        qDebug()<< "格式化失败";
        emit sigDialogResultThread(2,0);
        emit sigUpdateBtn(true);
        return false;
    }

    //将wim文件应用到系统盘
    WimApply(params[0].toString(), params[1].toInt(), systemDrive+":\\");
    if (m_DoingOutput.contains("Done applying WIM image") || (m_DoingOutput.contains("Applying metadata to files") && m_DoingOutput.contains("(100%) done"))) {
        qDebug() << "还原成功完成";
        emit sigDialogResultThread(2,1);
        emit sigUpdateBtn(true);
        return true;
    }else if(m_DoingOutput.contains("ERROR: Exiting with error code")){
        qDebug()<< "系统还原失败";
        emit sigDialogResultThread(2,0);
        emit sigUpdateBtn(true);
        return false;
    }

    return false;
}


void CSystemReloadThread::systemPEDownload()
{
    m_threadParams.clear();
    m_memberFun = &CSystemReloadThread::systemPEDownload;
    this->start();
}


bool CSystemReloadThread::systemPEDownload(QVariantList params)
{
    emit sigDialogResultThread(3,0);
    //创建下载文件夹
    QDir tempDir(m_DownloadFilePath);
    if (!tempDir.exists()) {
        if (!tempDir.mkpath(m_DownloadFilePath)) {
            qDebug() << "failed to create downDir";
            return false;
        }
    }


    //下载文件
    m_DownloadFlag = true;
    downloadFile(m_DownloadMd5, m_DownloadUrl, m_DownloadFilePath, "");
    if (!m_DownloadFlag) {
        qDebug() << "download error";
        emit sigDialogResultThread(3,1);
        return false;
    }


    //解压文件
    std::string strDownloadInfo = m_DownloadFilePath.toStdString() + "winPE_X64_local.zip";
    std::string strTempDirPath = m_DownloadFilePath.toStdString();

    unZip(strDownloadInfo.c_str(), strTempDirPath.c_str());
    DeleteFileA(strDownloadInfo.c_str());



    //本地模式，使用bcdedit.exe 编辑BCD引导文件，进行winPE的菜单添加
    QString systemDrive = getSystemDrive();
    QString cmd = QString("bcdedit /create {%1} /d %2 /device && "
                          "bcdedit /create  {%3} /d %4 /application osloader && "
                          "bcdedit /set {%5} ramdisksdidevice partition=%6: && "
                          "bcdedit /set {%7} ramdisksdipath %8 && "
                          "bcdedit /set {%9} device ramdisk=[%10:]%11,{%12} && "
                          "bcdedit /set {%13} description %14 && "
                          "bcdedit /set {%15} locale zh-CN && "
                          "bcdedit /set {%16} inherit {bootloadersettings} && "
                          "bcdedit /set {%17} osdevice ramdisk=[%18:]%19,{%20} && "
                          "bcdedit /set {%21} systemroot \\windows && "
                          "bcdedit /set {%22} detecthal Yes && "
                          "bcdedit /set {%23} winpe Yes && "
                          "bcdedit /set {%24} ems no && "
                          "bcdedit /displayorder {%25} /addlast && "
                          "bcdedit /timeout %26 && "
                          "bcdedit /default {%27}")
                      .arg(LOCAL_WINPE_DEVICE_GUID).arg(LOCAL_WINPE_DISPNAME)
                      .arg(LOCAL_WINPE_OSLOADER_GUID).arg(LOCAL_WINPE_DISPNAME)
                      .arg(LOCAL_WINPE_DEVICE_GUID).arg(systemDrive)
                      .arg(LOCAL_WINPE_DEVICE_GUID).arg(LOCAL_WINPE_BOOT_SDI)
                      .arg(LOCAL_WINPE_OSLOADER_GUID).arg(systemDrive).arg(LOCAL_WINPE_BOOT_WIM).arg(LOCAL_WINPE_DEVICE_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID).arg(LOCAL_WINPE_DISPNAME)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID).arg(systemDrive).arg(LOCAL_WINPE_BOOT_WIM).arg(LOCAL_WINPE_DEVICE_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(LOCAL_WINPE_OSLOADER_GUID)
                      .arg(10)
                      .arg(LOCAL_WINPE_OSLOADER_GUID);



    QStringList args;
    args << "/C" << cmd;

    QString program = "cmd.exe";
    QProcess process;
    process.start(program, args);
    process.waitForFinished();


    //移动到系统盘指定文件夹
    QString i4path = systemDrive + ":/i4";
    QDir i4Dir(i4path);
    if (!i4Dir.exists()) {
        if (!i4Dir.mkpath(i4path))
            qDebug() << "failed to create dir";
    }

    QString i4sourcepath = QDir::currentPath() + "/SystemBackup/temp/winPE_X64_local";
    CopyDir(i4sourcepath, i4path);


    //删除文件夹
    QDir(i4sourcepath).removeRecursively();

    emit sigDialogResultThread(3,2);
    return false;
}



//将某个盘捕获到指定目录，生成wim文件
//WimCapture("c:\\", "e:\\", "c_bak", "c盘备份");
void CSystemReloadThread::WimCapture(const QString& sourcePath, const QString& targetPath, const QString& backupName, const QString& backupDescription)
{
    //wimlib-imagex capture C:\ D:\C_Bak.wim C_bak C盘备份 --check --snapshot
    QString commandLine = QString("\"%1/SystemReload/wimlib-imagex.exe\" capture %2 \"%3\" \"%4\" \"%5\" --compress=XPRESS --threads=4 --snapshot")
    //QString commandLine = QString("\"%1/SystemReload/wimlib-imagex.exe\" capture %2 \"%3\" \"%4\" \"%5\" --check --snapshot")
                              .arg(QDir::currentPath())
                              .arg(sourcePath)
                              .arg(targetPath + backupName +".wim")
                              .arg(backupName)
                              .arg(backupDescription);

    runCMD(commandLine.toStdString());
}



//追加到某个wim文件
//WimAppend("c:\\", "e:\\", "c_bak", "c盘备份");
void CSystemReloadThread::WimAppend(const QString& sourcePath, const QString& targetPath, const QString& backupName, const QString& backupDescription)
{
    //wimlib-imagex append c:\ d:\c_bak.wim c_bak_2 c盘备份
    //追加的话，参数%4(备份名字(不是备份文件))不能和之前相同
    QString commandLine = QString("\"%1/SystemReload/wimlib-imagex.exe\" append %2 \"%3\" \"%4\" \"%5\" --compress=XPRESS --threads=4 --snapshot")
    //QString commandLine = QString("\"%1/SystemReload/wimlib-imagex.exe\" append %2 \"%3\" \"%4\" \"%5\" --check --snapshot")
                              .arg(QDir::currentPath())
                              .arg(sourcePath)
                              .arg(targetPath + backupName + ".wim")
                              .arg(backupName +"_"+ QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"))
                              .arg(backupDescription);

    runCMD(commandLine.toStdString());
}


//将wim文件应用到某个盘
//WimApply("e:\\c_bak.wim", 1, "c:\\");
void CSystemReloadThread::WimApply(const QString& backupPath, const int& index, const QString& targetPath)
{
    //wimlib-imagex apply d:\c_bak.wim 1 c:\

    QString commandLine = QString("\"%1/SystemReload/wimlib-imagex.exe\" apply \"%2\" %3 %4")
                              .arg(QDir::currentPath())
                              .arg(backupPath)
                              .arg(index)
                              .arg(targetPath);

    runCMD(commandLine.toStdString());
}


//检查wim文件信息
//WimInfo("e:\\c_bak.wim");
void CSystemReloadThread::WimInfo(const QString& backupPath)
{
    //wimlib-imagex info d:\c_bak.wim
    QString commandLine = QString("\"%1/SystemReload/wimlib-imagex.exe\" info \"%2\"")
                              .arg(QDir::currentPath())
                              .arg(backupPath);

    runCommandLine(commandLine);
}

//获取当前系统盘盘符
QString CSystemReloadThread::getSystemDrive()
{
    char str[MAX_PATH]{0};
    GetSystemDirectoryA(str, MAX_PATH);
    return QString::fromStdString(std::string(1, str[0]));
}


//磁盘格式化（需要在winPE执行）
//参数：盘符(c) 、 文件系统(ntfs)
bool CSystemReloadThread::FormatVolume(QString drive, QString format)
{
    QString program = "cmd.exe";
    QStringList arguments;
    arguments << "/c" << "format " + drive + ": /FS:" + format + " /Q /Y";


    QProcess p;
    p.start(program, arguments);
    if (p.waitForStarted())
    {
        p.waitForFinished();
        qDebug() << "成功";
        return true;
    }
    else
    {
        qDebug() << "失败";
        return false;
    }

    return 0;
}


//通过命令行执行外部程序
int CSystemReloadThread::runCMD(std::string cmd)
{
    HANDLE hPipeRead, hPipeWrite;
    SECURITY_ATTRIBUTES saAttr;
    STARTUPINFOA siStartInfo;
    DWORD dwRead;
    CHAR chBuf[4096];

    // 创建匿名管道
    saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
    saAttr.bInheritHandle = TRUE;
    saAttr.lpSecurityDescriptor = NULL;
    if (!CreatePipe(&hPipeRead, &hPipeWrite, &saAttr, 0))
    {
        return 1;
    }

    // 为子进程设置文件句柄
    SetHandleInformation(hPipeRead, HANDLE_FLAG_INHERIT, 0);

    // 初始化 STARTUPINFOA 结构体
    ZeroMemory(&siStartInfo, sizeof(STARTUPINFOA));
    siStartInfo.cb = sizeof(STARTUPINFOA);
    siStartInfo.hStdOutput = hPipeWrite;
    siStartInfo.hStdError = hPipeWrite;
    siStartInfo.dwFlags |= STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;

    // 启动外部程序
    if (!CreateProcessA(NULL, (LPSTR)cmd.c_str(), NULL, NULL, TRUE, 0, NULL, NULL, &siStartInfo, &piProcInfo))
    {
        return 1;
    }

    // 关闭管道的写入端，这样在读取管道时可以知道进程已结束
    CloseHandle(hPipeWrite);

    // 循环读取管道中的输出信息
    while (ReadFile(hPipeRead, chBuf, sizeof(chBuf), &dwRead, NULL) && dwRead > 0)
    {
        // 在这里对 chBuf 中的输出信息进行处理
        // 例如输出到控制台
        m_DoingOutput = QString::fromStdString(ANSItoUTF8(chBuf));
        emit sigUpdateDoingText(m_DoingOutput);

//        QFile logfile(QDir::currentPath()+ "/SystemBackup/test.log");
//        logfile.open(QIODevice::ReadWrite|QIODevice::Text|QIODevice::Append);
//        QDataStream out(&logfile);
//        out<< m_DoingOutput <<"\r\n";
//        logfile.close();
    }

    // 等待子进程结束
    WaitForSingleObject(piProcInfo.hProcess, INFINITE);

    // 关闭句柄
    CloseHandle(piProcInfo.hProcess);
    CloseHandle(piProcInfo.hThread);
    CloseHandle(hPipeRead);

    return 0;
}


//关闭正在执行的外部程序
void CSystemReloadThread::killProcess()
{
    if(piProcInfo.hProcess){
        TerminateProcess(piProcInfo.hProcess,0);
        CloseHandle(piProcInfo.hProcess);
        CloseHandle(piProcInfo.hThread);
    }
}



//下载文件
bool CSystemReloadThread::downloadFile(QString md5, const QString& downloadUrl, const QString& downloadDirPath, const QString& filename)
{
    //请求链接
    QStringList list = downloadUrl.split("/");
    QString filename2 = list.at(list.size() - 1);

    if (filename.length() > 0)
        filename2 = "/" + filename;

    //存放文件夹
    QString downloadDir(downloadDirPath);
    QDir dir(downloadDir);
    if (!dir.exists()) {
        if (!dir.mkpath(downloadDir))
            qDebug() << "failed to create dir";
    }

    //打开目标文件，先open，便于后续分块写入
    QString downloadName(downloadDir + filename2);
    QFile downloadFile(downloadName);
    if (!downloadFile.open(QIODevice::ReadWrite)) {
        qDebug() << "open downloadFile error";
        return false;
    }

    //发送HTTP-Get请求
    QEventLoop* loop = new QEventLoop;
    QNetworkAccessManager* manager = new QNetworkAccessManager(this);
    QNetworkRequest request;
    request.setUrl(QUrl(downloadUrl));

    QNetworkReply* reply = manager->get(request);
    if (!reply) {
        qDebug() << "Failed to send request!";
        return false;
    }
    //信号与槽接收响应
    //分块获取文件信息，并写入文件中
    QObject::connect(reply, &QNetworkReply::readyRead, this, [&]() {
            downloadFile.write(reply->readAll());
        }, Qt::DirectConnection);

    //定时获取下载进度
    qint64 curtype = 0;
    qint64 oldtype = 0;
    qint64 totaltype = 0;
    int usetime = 0;
    QTimer* time = new QTimer(this);
    time->start(1000);
    QObject::connect(time, &QTimer::timeout, this, [&] {
            qint64 speed = curtype - oldtype;
            oldtype = curtype;
            usetime++;
        }, Qt::DirectConnection);

    //网络请求完成时
    QObject::connect(reply, &QNetworkReply::finished, this, [&]() {
            //处理HTTP响应
            if (reply->error() != QNetworkReply::NoError) {
                qDebug() << "Error:" << reply->errorString();
                qDebug() << "download failed！";
                downloadFile.close();
                m_DownloadFlag = false;
                dir.remove(downloadName);
            }
            else {
                downloadFile.write(reply->readAll());
                downloadFile.close();
                qDebug() << "download success";

                //检验文件
                QFile theFile(downloadName);
                if (!theFile.open(QIODevice::ReadOnly)) {
                    qDebug() << "open failed";
                }

                QCryptographicHash hash(QCryptographicHash::Md5);
                const qint64 blockSize = 1024 * 1024 * 100;  // 每次读取的块大小
                QByteArray buffer;
                while (!theFile.atEnd()) {
                    buffer = theFile.read(blockSize);
                    hash.addData(buffer);
                }
                QByteArray md5file = hash.result();

                theFile.close();
                if (md5file.toHex().constData() != md5.toLower()) {
                    m_DownloadFlag = false;
                    DeleteFileA(downloadName.toStdString().c_str());
                }
                else {

                }
            }

            manager->deleteLater();
            reply->deleteLater();
            time->deleteLater();
            loop->exit();
        }, Qt::DirectConnection);

    // 下载进度处理
    QObject::connect(reply, &QNetworkReply::downloadProgress, [&](qint64 bytesReceived, qint64 bytesTotal) {
        //qDebug() << "Downloaded" << bytesReceived << "out of" << bytesTotal << "bytes";
        curtype = bytesReceived;
        totaltype = bytesTotal;
    });

    loop->exec();
    return m_DownloadFlag;
}




//解压压缩包
//传参：压缩包路径、目标文件夹路径
void CSystemReloadThread::unZip(const char* zipName, const char* dirName) {
    int iErr = 0;
    struct zip* zipfile = NULL;
    struct zip_file* entries = NULL;
    struct zip_stat stat;
    zip_int64_t i64Num = 0;
    zip_int64_t i64Count = 0;
    int iRead = 0;
    int iLen = 0;
    char buf[1024];

    memset(&stat, 0, sizeof(stat));
    memset(buf, 0, sizeof(buf));

    zipfile = zip_open(zipName, ZIP_CHECKCONS, &iErr);
    if (!zipfile)
    {
        printf("zip open failed:%d\n", iErr);
        exit(EXIT_FAILURE);
    }

    //get how many entrrites in archive
    i64Num = zip_get_num_entries(zipfile, 0);
    for (i64Count = 0; i64Count < i64Num; i64Count++)
    {
        iLen = 0;
        if (zip_stat_index(zipfile, i64Count, 0, &stat) == 0)
        {
            printf("the file name is:%s\n", stat.name);
        }

        entries = zip_fopen_index(zipfile, i64Count, 0);
        if (!entries)
        {
            printf("fopen index failed\n");
            goto End;
        }

        //create the original file
        char filePath[MAX_PATH]{ 0 };
        strcpy(filePath, dirName);
        strcat(filePath, "/");
        strcat(filePath, stat.name);

        if (filePath[strlen(filePath) - 1] == '/') {
            QDir tempDir(filePath);
            if (!tempDir.exists()) {
                if (!tempDir.mkdir(filePath))
                    qDebug() << "failed to create dir";
            }
            zip_fclose(entries);
            continue;
        }

        FILE* fp = fopen(filePath, "wb+");
        if (!fp)
        {
            printf("create local file failed\n");
            zip_fclose(entries);
            goto End;
        }

        while (iLen < stat.size)
        {
            iRead = zip_fread(entries, buf, 1024);
            if (iRead < 0)
            {
                printf("read file failed\n");
                fclose(fp);
                zip_fclose(entries);
                goto End;
            }

            fwrite(buf, 1, iRead, fp);
            iLen += iRead;
        }

        zip_fclose(entries);
        fclose(fp);
    }

End:
    zip_close(zipfile);
}




//拷贝文件夹
//CopyDir("e:\\zyh","f:\\zyh");
bool CSystemReloadThread::CopyDir(const QString& fromDir, const QString& toDir)
{
    QDir sourceDir(fromDir);
    QDir targetDir(toDir);
    if (!targetDir.exists()) {    /**< 如果目标目录不存在，则进行创建 */
        if (!targetDir.mkpath(targetDir.absolutePath())) {
            qDebug() << targetDir.absolutePath();
            return false;
        }
    }

    QFileInfoList fileInfoList = sourceDir.entryInfoList();
    foreach(QFileInfo fileInfo, fileInfoList) {
        if (fileInfo.fileName() == "." || fileInfo.fileName() == "..")
            continue;

        if (fileInfo.isDir()) {    /**< 当为目录时，递归的进行copy */
            if (!CopyDir(fileInfo.filePath(), targetDir.filePath(fileInfo.fileName())))
                return false;
        }
        else {            /**< 当允许覆盖操作时，将旧文件进行删除操作 */
            if (targetDir.exists(fileInfo.fileName())) {
                targetDir.remove(fileInfo.fileName());
            }

            /// 进行文件copy
            if (!QFile::copy(fileInfo.filePath(), targetDir.filePath(fileInfo.fileName()))) {
                return false;
            }
            else {
                qDebug() << "copy file" << fileInfo.filePath() << "success";
            }
        }
    }
    return true;
}

本次主要利用该工具做系统备份和还原，经研究发现，极客狗装机和老毛桃之类的第三方系统操作软件，调用的其实也是wimlib-imagex.exe，因此进行参考，但是发现利用其备份系统时，有时候遇到某些文件会导出备份出错，暂不清楚原因。