当从 cmd.exe (CreatProcess) 输出命令时，我得到 "More?" 为什么以及如何摆脱它？

Question

我对 cmd.exe 的第二个输出有疑问。我使用：CreatePipe() 来link个进程； CreateProcess()创建一个进程运行'cmd.exe'.

问题是我无法从 cmd.exe

获得正确的输出

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

using namespace std;


#define deffBuffSize 4096


int funCo() {

    HANDLE writeToCL, readFromCL, writeToProcess, readFromProcess;
    char lpCmdLine[] = "cmd.exe", lpCL[512];
    memset(lpCL, '[=12=]', 512);
    if (GetEnvironmentVariableA("COMSPEC", lpCL, 512) == 0) {
        cout << "GetEnvironmentVariableA error :: " << GetLastError() << endl;
    }
    cout << lpCL << endl;
    STARTUPINFOA siA;
    PROCESS_INFORMATION piApp;
    SECURITY_ATTRIBUTES secAttr;
    ZeroMemory(&secAttr, sizeof(SECURITY_ATTRIBUTES));
    ZeroMemory(&siA, sizeof(STARTUPINFOA));
    secAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
    secAttr.lpSecurityDescriptor = NULL;
    secAttr.bInheritHandle = TRUE;

    if (CreatePipe(&readFromCL, &writeToProcess, &secAttr, 0) == 0) {
        cout << "Create pipe error :: " << GetLastError() << endl;
        return 1;
    }
    if (!SetHandleInformation(readFromCL, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT)) {
        cout << "SetHandleInformation error :: " << GetLastError() << endl;
    }

    if (CreatePipe(&readFromProcess, &writeToCL, &secAttr, 0) == 0) {
        cout << "Create pipe error :: " << GetLastError() << endl;
        return 1;
    }
    if (!SetHandleInformation(writeToCL, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT)) {
        cout << "SetHandleInformation error :: " << GetLastError() << endl;
    }

    siA.cb = sizeof(STARTUPINFOA);
    siA.hStdInput = readFromProcess;
    siA.hStdOutput = writeToProcess;
    siA.hStdError = writeToProcess;
    siA.dwFlags = STARTF_USESTDHANDLES;


    if (CreateProcessA(lpCL, NULL, NULL, NULL, TRUE, CREATE_NO_WINDOW, NULL, NULL, &siA, &piApp) == 0) {
        cout << "CreateProcessA error :: " << GetLastError() << endl;
        return 1;
    }
    
    CloseHandle(readFromProcess);
    CloseHandle(writeToProcess);

    Sleep(2000);
    DWORD dRead = 0, dWrite = 0;
    char chBuff[deffBuffSize];
    memset(chBuff, '[=12=]', deffBuffSize);
    if (ReadFile(readFromCL, chBuff, deffBuffSize, &dRead, NULL) == FALSE) {
        cout << "ReadFile error :: " << GetLastError() << endl;
        return 1;
    }
    cout << chBuff;

    for (;;) {
        memset(chBuff, '[=12=]', deffBuffSize);
        fgets(chBuff, deffBuffSize, stdin);
        if (WriteFile(writeToCL, chBuff, sizeof(chBuff), &dWrite, NULL) == FALSE) {
            cout << "WriteFile error :: " << GetLastError() << endl;
            return 1;
        }
        Sleep(2000);
        memset(chBuff, '[=12=]', deffBuffSize);
        if (ReadFile(readFromCL, chBuff, deffBuffSize, &dRead, NULL) == FALSE) {
            cout << "ReadFile error :: " << GetLastError() << endl;
            return 1;
        }
        cout << chBuff;

    }

    CloseHandle(writeToCL);
    CloseHandle(readFromCL);
    CloseHandle(piApp.hProcess);
    CloseHandle(piApp.hThread);
    return 0;
}

int main() {
    int result = 0;
    result = funCo();
    cout << endl;
    system("pause");
    return result;
}

黄色标记是用户输入的命令。
红色标记 - 命令结果的输出。

如果输出是“更多？”按 ENTER，然后我们将收到一个错误 ERROR_BROKEN_PIPE (109) - 管道已结束。

如何理解“更多”？如果要显示下一个 sheet 信息，请写入。

但是如何绕过这个“更多”？

请帮忙，我将非常感谢你。 =)

以下部分与评论有关：

未禁用自动滚动

我在写入 cmd.exe

时尝试使用静态命令

但是在这个动作之后我发现自己陷入了“僵局”

Sleep(2000);
    DWORD dRead = 0, dWrite = 0;
    char chBuff[deffBuffSize];
    memset(chBuff, '[=13=]', deffBuffSize);
    if (ReadFile(readFromCL, chBuff, deffBuffSize, &dRead, NULL) == FALSE) {
        cout << "ReadFile error :: " << GetLastError() << endl;
        return 1;
    }
    cout << chBuff;
    char outMes[] = "ipconfig[=13=]";

    for (;;) {
        /*memset(chBuff, '[=13=]', deffBuffSize);
        fgets(chBuff, deffBuffSize, stdin);*/
        
        if (WriteFile(writeToCL, outMes, sizeof(outMes), &dWrite, NULL) == FALSE) {
            cout << "WriteFile error :: " << GetLastError() << endl;
            return 1;
        }
        cout << "WriteFile :: " << dWrite << endl;
        Sleep(2000);
        memset(chBuff, '[=13=]', deffBuffSize);
        if (ReadFile(readFromCL, chBuff, deffBuffSize, &dRead, NULL) == FALSE) {
            cout << "ReadFile error :: " << GetLastError() << endl;
            return 1;
        }
        cout << chBuff;

    }

Answer 1

整个错误是我：

使用“\0”
WriteFile (writeToCL, outMes, sizeof (outMes) - 1, & dWrite, NULL) 写了两个字符“\0”

这个程序无休止地输入和接收有关ipconfig的信息

命令行接受这样的命令：[i][p][c][o][n][f][i][g][\n][\0]

char outMes[] = "ipconfig\n";

for (;;) {
if (WriteFile(writeToCL, outMes, sizeof(outMes) - 1, &dWrite, NULL) == FALSE) {
cout << GetLastError() << " :: error WriteFile" << endl;
return 1;
}
Sleep(2000);
memset(chBuff, '[=10=]', deffBuffSize);
if (ReadFile(readFromCL, chBuff, deffBuffSize, &dRead, NULL) == FALSE) {
cout << "ReadFile error :: " << GetLastError() << endl;
return 1;
}
cout << chBuff;

}

P.S：使用strlen判断一个字符串的长度。而不是 sizeof()

当从 cmd.exe (CreatProcess) 输出命令时，我得到 "More?" 为什么以及如何摆脱它？

When outputting commands from cmd.exe (CreatProcess) I get "More?" Why and how to get rid of it?

c++

winapi

cmd

createprocess