cmd.exe 使用 CreateProcess 调用后立即关闭

cmd.exe immediately closes after calling with CreateProcess

我正在尝试使用 CreateProcess 函数执行批处理文件,但是 cmd.exe 立即关闭而没有打开执行批处理文件。

还传递了一个参数(目录路径)。

C++ 代码是:

int main()
{
    std::wstring cmdPath;
    std::wstring batchFile;
    batchFile = L"\"B:\code\Batch\all_files.bat\"";
    std::wstring args = L"\"B:\code\Batch\"";

    {
        wchar_t cmdP[500] = L"  ";
        GetEnvironmentVariable(L"COMSPEC", cmdP, 500);
        cmdPath = cmdP;
    }

    std::wstring CmdLine = L"/c " + batchFile + L" " + args;

    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));
    if (!
        CreateProcess
        (
            cmdPath.c_str(),
            const_cast<LPWSTR>(CmdLine.c_str()),
            NULL, NULL, FALSE,
            CREATE_NEW_CONSOLE,
            NULL, NULL,
            &si,
            &pi
        )
        )
    {
        std::cout << "bad";
        std::cin.get();
        return 1;
    }
    std::cout << "yay......\n";
    std::cin.get();
    return 0;
}

批处理文件是

echo hello.

set directory=%~1

cd %directory%

dir > files.txt

pause

exit 0

输出

yay......

已获取,但已获取文件 files.txt 或 echo hello. 的输出。

答案似乎是需要用引号将整个命令行(\c 除外)括起来。

因此程序变为:

int main()
{
    std::wstring cmdPath;
    std::wstring batchFile;
    batchFile = L"\"B:\Harith Source code\Batch\all_files.bat\"";
    std::wstring args = L"\"B:\Harith Source code\Batch\"";

    {
        wchar_t cmdP[500] = L"  ";
        GetEnvironmentVariable(L"COMSPEC", cmdP, 500);
        cmdPath = cmdP;
    }

    std::wstring CmdLine = L"/c " + std::wstring(L"\"") + batchFile + L" " + args + L"\"";

    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));
    if (!
        CreateProcess
        (
            cmdPath.c_str(),
            const_cast<LPWSTR>(CmdLine.c_str()),
            NULL, NULL, FALSE,
            CREATE_NEW_CONSOLE,
            NULL, NULL,
            &si,
            &pi
        )
        )
    {
        std::cout << "bad";
        std::cin.get();
        return 1;
    }
    std::cout << "yay......\n";
    std::cin.get();
    return 0;
}

编辑:对于最后的代码,我将 /k 改回 /c