如何在Windows中读取子进程的stdout？

#include <windows.h>
#include <iostream>

int main()
{
    SECURITY_ATTRIBUTES saAttr;
    HANDLE hChildStdoutRead = NULL;
    HANDLE hChildStdoutWrite = NULL;

    // 创建匿名管道
    saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
    saAttr.bInheritHandle = TRUE;
    saAttr.lpSecurityDescriptor = NULL;
    if (!CreatePipe(&hChildStdoutRead, &hChildStdoutWrite, &saAttr, 0))
    {
        std::cerr << "CreatePipe failed" << std::endl;
        return 1;
    }

    // 设置管道写入端口为不可继承
    if (!SetHandleInformation(hChildStdoutWrite, HANDLE_FLAG_INHERIT, 0))
    {
        std::cerr << "SetHandleInformation failed" << std::endl;
        return 1;
    }

    // 创建子进程
    PROCESS_INFORMATION piProcInfo;
    STARTUPINFO siStartInfo;
    BOOL bSuccess = FALSE;

    ZeroMemory(&piProcInfo, sizeof(PROCESS_INFORMATION));
    ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
    siStartInfo.cb = sizeof(STARTUPINFO);
    siStartInfo.hStdError = hChildStdoutWrite;
    siStartInfo.hStdOutput = hChildStdoutWrite;
    siStartInfo.dwFlags |= STARTF_USESTDHANDLES;

    bSuccess = CreateProcess(NULL,
        "your_command", // 替换为要执行的命令
        NULL,
        NULL,
        TRUE,
        0,
        NULL,
        NULL,
        &siStartInfo,
        &piProcInfo);

    if (!bSuccess)
    {
        std::cerr << "CreateProcess failed" << std::endl;
        return 1;
    }

    // 关闭不需要的管道句柄
    CloseHandle(hChildStdoutWrite);

    // 读取子进程的输出
    const int BUFFER_SIZE = 4096;
    char buffer[BUFFER_SIZE];
    DWORD bytesRead = 0;
    std::string output;

    while (true)
    {
        bSuccess = ReadFile(hChildStdoutRead, buffer, BUFFER_SIZE, &bytesRead, NULL);
        if (!bSuccess || bytesRead == 0)
            break;

        output.append(buffer, bytesRead);
    }

    // 输出子进程的输出
    std::cout << "Child process output: " << output << std::endl;

    // 等待子进程退出
    WaitForSingleObject(piProcInfo.hProcess, INFINITE);

    // 关闭进程和管道句柄
    CloseHandle(piProcInfo.hProcess);
    CloseHandle(piProcInfo.hThread);
    CloseHandle(hChildStdoutRead);

    return 0;
}