如何在启动 Mozilla Firefox 时获取进程 ID？

Question

获取我正在启动的进程的 PID 的任务，CreateProcess() ProcessInformation.dwProcessId 在这方面做得很好，但就我而言，我启动的进程打开了子进程处理然后关闭，我需要获取创建我正在打开的进程的所有 PID。

我找到这段代码，它接收子 PID，但它们与最终的 Firefox 不匹配 window，我做错了什么

来源：

更新 1 在 Drake Wu - MSFT 评论之后，我使用了以下代码

int test(const wchar_t* programPath) {
    HANDLE Job = CreateJobObject(nullptr, nullptr);
    if (!Job) {
        std::cout << "CreateJobObject, error " << GetLastError() << std::endl;
        return 0;
    }

    HANDLE IOPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, nullptr, 0, 1);
    if (!IOPort) {
        std::cout << "CreateIoCompletionPort, error " << GetLastError() << std::endl;
        return 0;
    }

    JOBOBJECT_ASSOCIATE_COMPLETION_PORT Port;
    Port.CompletionKey = Job;
    Port.CompletionPort = IOPort;
    if (!SetInformationJobObject(Job,
        JobObjectAssociateCompletionPortInformation,
        &Port, sizeof(Port))) {
        std::cout << "SetInformation, error " << GetLastError() << std::endl;
        return 0;
    }

    PROCESS_INFORMATION ProcessInformation;
    STARTUPINFOW StartupInfo = { sizeof(StartupInfo) };
    LPWSTR szCmdline = const_cast<LPWSTR>(programPath);

    if (!CreateProcessW(
        programPath,
        nullptr,
        nullptr,
        nullptr,
        FALSE,
        CREATE_SUSPENDED,
        nullptr,
        nullptr,
        &StartupInfo,
        &ProcessInformation))
    {
        std::cout << "CreateProcess, error " << GetLastError() << std::endl;
        return 0;
    }
    std::cout << "PID: " << ProcessInformation.dwProcessId << std::endl;
    if (!AssignProcessToJobObject(Job, ProcessInformation.hProcess)) {
        std::cout << "Assign, error " << GetLastError() << std::endl;
        return 0;
    }

    ResumeThread(ProcessInformation.hThread);
    CloseHandle(ProcessInformation.hThread);
    CloseHandle(ProcessInformation.hProcess);

    DWORD CompletionCode;
    ULONG_PTR CompletionKey;
    LPOVERLAPPED Overlapped;
    while (GetQueuedCompletionStatus(IOPort, &CompletionCode, &CompletionKey, &Overlapped, INFINITE))
    {
        switch (CompletionCode)
        {
        case JOB_OBJECT_MSG_NEW_PROCESS:
            std::cout << "New PID: " << (int)Overlapped << std::endl;
            break;
        case JOB_OBJECT_MSG_EXIT_PROCESS:
            std::cout << "Exit PID: " << (int)Overlapped << std::endl;
            break;
        case JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO:
            std::cout << "JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO" << std::endl;
            break;
        default:
            break;
        }
        if (CompletionCode == JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO)
            break;
    }
    std::cout << "All done" << std::endl;
}

我得到了以下结果：

standart Firefox

test(L"C:\Program Files\Mozilla Firefox\firefox.exe");

portable edition Firefox

test(L"D:\FirefoxPortable\FirefoxPortable.exe");

和以前一样，PID 返回错误。在便携版的情况下，进程挂在while循环上，在firefox标准版的情况下，GetQueuedCompletionStatus()returnsJOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO。为什么我得到错误的结果？

更新 2

我运行 Visual Studio 作为管理员，但是在标准启动时一切都显示正确

Answer 1

我测试过Firefox的进程不是新建的，是按顺序退出的（CreateProcess获取到的pid会退出），如果有新的进程创建，你的代码不会接收到新的Firefox进程稍后。

您可以使用 swtich-case 语句，以下示例适用于我：

int openProgram(const wchar_t* programPath) {
    HANDLE Job = CreateJobObject(nullptr, nullptr);
    if (!Job) {
        std::cout << "CreateJobObject, error " << GetLastError() << std::endl;
        return 0;
    }

    HANDLE IOPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, nullptr, 0, 1);
    if (!IOPort) {
        std::cout << "CreateIoCompletionPort, error " << GetLastError() << std::endl;
        return 0;
    }

    JOBOBJECT_ASSOCIATE_COMPLETION_PORT Port;
    Port.CompletionKey = Job;
    Port.CompletionPort = IOPort;
    if (!SetInformationJobObject(Job,
        JobObjectAssociateCompletionPortInformation,
        &Port, sizeof(Port))) {
        std::cout << "SetInformation, error " << GetLastError() << std::endl;
        return 0;
    }

    PROCESS_INFORMATION ProcessInformation;
    STARTUPINFO StartupInfo = { sizeof(StartupInfo) };
    LPTSTR szCmdline = _tcsdup(programPath);
    if (!CreateProcessW(
        nullptr,
        szCmdline,
        nullptr,
        nullptr,
        FALSE,
        CREATE_SUSPENDED,
        nullptr,
        nullptr,
        &StartupInfo,
        &ProcessInformation))
    {
        std::cout << "CreateProcess, error " << GetLastError() << std::endl;
        return 0;
    }
    std::cout << "PID: " << ProcessInformation.dwProcessId << std::endl;
    if (!AssignProcessToJobObject(Job, ProcessInformation.hProcess)) {
        std::cout << "Assign, error " << GetLastError() << std::endl;
        return 0;
    }

    ResumeThread(ProcessInformation.hThread);
    CloseHandle(ProcessInformation.hThread);
    CloseHandle(ProcessInformation.hProcess);

    DWORD CompletionCode;
    ULONG_PTR CompletionKey;
    LPOVERLAPPED Overlapped;
    while (GetQueuedCompletionStatus(IOPort, &CompletionCode, &CompletionKey, &Overlapped, INFINITE))
    {
        switch (CompletionCode)
        {
        case JOB_OBJECT_MSG_NEW_PROCESS:
            std::cout << "New PID: " << (int)Overlapped << std::endl;
            break;
        case JOB_OBJECT_MSG_EXIT_PROCESS:
            std::cout << "Exit PID: " << (int)Overlapped << std::endl;
            break;
        case JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO:
            std::cout << "JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO" << std::endl;
            break;
        default:
            break;
        }
        if (CompletionCode == JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO)
            break;
    }
    std::cout << "All done" << std::endl;
}

结果：

如何在启动 Mozilla Firefox 时获取进程 ID？

How to get the process ID when starting Mozilla Firefox?

c++

winapi

pid

createprocess