CreateProcess和CreatePipe在VC ++中执行进程并以字符串形式返回输出

以下是在VC ++中使用CreateProcess和CreatePipe执行进程并以字符串形式返回输出的示例代码：

#include <windows.h> #include <iostream> #include <string> std::string ExecuteCommand(const std::string& cmd) { SECURITY_ATTRIBUTES securityAttributes; securityAttributes.nLength = sizeof(SECURITY_ATTRIBUTES); securityAttributes.bInheritHandle = TRUE; securityAttributes.lpSecurityDescriptor = NULL; HANDLE StdOutRead, StdOutWrite; CreatePipe(&StdOutRead, &StdOutWrite, &securityAttributes, 0); SetHandleInformation(StdOutRead, HANDLE_FLAG_INHERIT, 0); STARTUPINFOA startupInfo; ZeroMemory(&startupInfo, sizeof(startupInfo)); startupInfo.cb = sizeof(startupInfo); startupInfo.hStdOutput = StdOutWrite; startupInfo.dwFlags |= STARTF_USESTDHANDLES; PROCESS_INFORMATION processInfo; ZeroMemory(&processInfo, sizeof(processInfo)); if (!CreateProcessA(NULL, const_cast<LPSTR>(cmd.c_str()), NULL, NULL, TRUE, 0, NULL, NULL, &startupInfo, &processInfo)) { std::cerr << "Failed to execute command: " << cmd << std::endl; return ""; } CloseHandle(StdOutWrite); DWORD bytesRead; const int bufferSize = 4096; char buffer[bufferSize]; std::string output; while (ReadFile(StdOutRead, buffer, bufferSize - 1, &bytesRead, NULL)) { if (bytesRead == 0) break; buffer[bytesRead] = '\0'; output += buffer; } CloseHandle(StdOutRead); WaitForSingleObject(processInfo.hProcess, INFINITE); CloseHandle(processInfo.hProcess); CloseHandle(processInfo.hThread); return output; } int main() { std::string cmd = "dir"; std::string output = ExecuteCommand(cmd); std::cout << "Command output: " << std::endl; std::cout << output << std::endl; return 0; } 

上述代码使用CreatePipe创建了一个匿名管道，将进程的输出重定向到管道的写入端，然后使用ReadFile从管道的读取端读取输出。最后，使用CreateProcess启动进程并等待其完成。

在上述示例中，cmd变量包含要执行的命令，该命令是一个简单的"dir"命令，它会列出当前目录中的文件和文件夹。您可以根据需要更改cmd变量以执行其他命令。