C语言如何获取 调用的外部程序 标准输出的内容

Question

这个是在网上搜索的，但还是获取不到。
那位大神给改一下，好久没写C了

int GetRun()
{
    SECURITY_ATTRIBUTES sa;
    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.lpSecurityDescriptor = NULL;
    sa.bInheritHandle = TRUE;

    HANDLE outHandle;
    outHandle = CreateFile(L"aa.txt", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, &sa, CREATE_ALWAYS, 0, NULL);

    PROCESS_INFORMATION processInfo;
    STARTUPINFO startUpInfo;

    memset(&startUpInfo, 0, sizeof(STARTUPINFO));
    memset(&processInfo, 0, sizeof(PROCESS_INFORMATION));

    startUpInfo.cb = sizeof(STARTUPINFO);
    startUpInfo.dwFlags = STARTF_USESTDHANDLES;
    startUpInfo.wShowWindow = SW_SHOWNORMAL;

    startUpInfo.hStdOutput = outHandle;

    if (!CreateProcess(L"Coreinfo.exe", NULL, NULL, NULL, FALSE,
        CREATE_NEW_CONSOLE, NULL, NULL,
        &startUpInfo, &processInfo)){
        CloseHandle(outHandle);
        printf("open hello.exe error\n");
    }
    else
    {
        DWORD filesize = 1000;
        char * buffer = (char *)malloc(filesize + 1);
        memset(buffer, 0, filesize + 1);
        DWORD readsize;
        ReadFile(outHandle, buffer, filesize, &readsize, NULL);
        buffer[filesize] = 0;
        printf("1111111 - %s\n", buffer);
        free(buffer);

        WaitForSingleObject(processInfo.hProcess, INFINITE);
        printf("open hello.exe ok\n");

        CloseHandle(outHandle);

        CloseHandle(processInfo.hProcess);
        CloseHandle(processInfo.hThread);
    }

    return 0;
}

Answer 1

用匿名管道就可以，CreateFile是产生命名管道的，而且文件名也不正确。请搜索匿名管道和命名管道即可。

Answer 2

popen``

Answer 3

Creating a Child Process with Redirected Input and Output