C ++ CreateProcess Telnet [英] C++ CreateProcess Telnet

问题描述

Hello, I have problem with CreateProcess and Telnet. The main question is why telnet.exe file contains:

'telnet'未被识别为内部或外部命令，

'telnet' is not recognized as an internal or external command,

可操作程序或批处理文件。

operable program or batch file.

我在PC上安装了telnet。哪里有问题？

I checked on PC telnet is installed. Where is problem?

void SaveResult(const wchar_t *fileName, const wchar_t *commandLine)
{
    SECURITY_ATTRIBUTES sa;
    sa.nLength = sizeof(sa);
    sa.lpSecurityDescriptor = NULL;
    sa.bInheritHandle = TRUE;

    HANDLE h = CreateFile(fileName, FILE_WRITE_DATA, FILE_SHARE_WRITE | FILE_SHARE_READ,
        &sa, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if(h == INVALID_HANDLE_VALUE)
        return;

    PROCESS_INFORMATION pi = { 0 };
    STARTUPINFO si = { sizeof(si) };
    si.dwFlags |= STARTF_USESTDHANDLES;
    si.hStdInput = NULL;
    si.hStdError = h;
    si.hStdOutput = h;

    wchar_t *writable_cmdline = _wcsdup(commandLine);
    BOOL success = CreateProcess(NULL, writable_cmdline,
        NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi);

    bool finished = false;

    //wait for 1 second
    for(int i = 0; i < 10; i++)
    {
        if(WaitForSingleObject(pi.hProcess, 100) <= 0)
        {
            finished = true;
            break;
        }
    }

    if(success)
    {
        CloseHandle(pi.hProcess);
        CloseHandle(pi.hThread);
    }

    CloseHandle(h);
    free(writable_cmdline);

    if(!finished)
        printf("Process didn't finish\n");
}


int main()
{
    SaveResult(L"telnet.txt", L"C:\\windows\\system32\\cmd.exe /c telnet");
    SaveResult(L"ipconfig.txt", L"C:\\windows\\system32\\cmd.exe /c ipconfig");
    return 0;
}

推荐答案

您看到的错误文字是由cmd.exe返回，因为它无法找到telnet可执行文件。

The error text you are seeing is returned by cmd.exe because it cannot find the telnet executable.

telnet可执行文件是否安装在搜索路径中的某个位置？

Is the telnet executable installed in a location that is in the search path?

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