匿名管道读取CMD回显信息
之前用了很坑爹的做法去读取了cmd命令的回显信息,现在发现了用匿名管道的实现方法,由于楼主没有学过Windows核心编程,找了一个代码来凑数
存下来以后研究
#include <windows.h> #include <stdio.h> #define EXE_NAME NULL//TEXT("Cmd.exe") #define EXE_CMD TEXT("Cmd.exe /C ipconfig/all") int main() { char Buffer[4096]; STARTUPINFO sInfo;//新进程的主窗口特性 PROCESS_INFORMATION pInfo; SECURITY_ATTRIBUTES sa; HANDLE hRead, hWrite; DWORD bytesRead; //读取代码的长度 sa.nLength = sizeof(SECURITY_ATTRIBUTES);/ /结构体的大小,可用SIZEOF取得 sa.lpSecurityDescriptor = NULL;//安全描述符 sa.bInheritHandle = TRUE;;/ /安全描述的对象能否被新创建ÆÆ的进程继承 if (!CreatePipe(&hRead, &hWrite, &sa, 0)) //创建匿名管道 { return GetLastError();//返回最近的一个错误,0表示正常 } GetStartupInfo(&sInfo); sInfo.cb = sizeof(sInfo); sInfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; sInfo.wShowWindow = SW_HIDE; sInfo.hStdError = hWrite; //将管道的写端交给子进程 sInfo.hStdOutput = hWrite; memset(&pInfo, 0, sizeof(pInfo)); if (!CreateProcess(EXE_NAME, EXE_CMD, NULL, NULL, TRUE, 0, NULL, NULL, &sInfo, &pInfo)) //创建子进程 { CloseHandle(hWrite); CloseHandle(hRead); return GetLastError(); } CloseHandle(hWrite); //关闭父进程的写端 for (int i = 0;; ++i) { if (!ReadFile(hRead, Buffer, sizeof(Buffer) - 1, &bytesRead, NULL)) //读取内容 { break; } Buffer[bytesRead] = 0; printf("%s\n", Buffer); } WaitForSingleObject(pInfo.hProcess, INFINITE);//当等待仍在挂起状态时,句柄被关闭,那么函数行为是未定义的。该句柄必须具有 SYNCHRONIZE 访问权限; CloseHandle(hRead); system("pause"); return 0; }