创建可继承的进程
本文演示如何通過 CreateProcess 創(chuàng)建一個進(jìn)程句柄和主線程句柄可以被繼承的子進(jìn)程。
BOOL CreateProcess(LPCTSTR lpApplicationName, // name of executable moduleLPTSTR lpCommandLine, // command line stringLPSECURITY_ATTRIBUTES LPSECURITY_ATTRIBUTES , // SDLPSECURITY_ATTRIBUTES lpThreadAttributes, // SDBOOL bInheritHandles, // handle inheritance optionDWORD dwCreationFlags, // creation flagsLPVOID lpEnvironment, // new environment blockLPCTSTR lpCurrentDirectory, // current directory nameLPSTARTUPINFO lpStartupInfo, // startup informationLPPROCESS_INFORMATION lpProcessInformation // process information);CreateProcess 的第三,第四參數(shù)分別表示新進(jìn)程的進(jìn)程屬性和主線程屬性,如果希望創(chuàng)建一個新進(jìn)程,使得新進(jìn)程的進(jìn)程句柄和主線程句柄在當(dāng)前進(jìn)程的句柄表中可以被繼承,則需要對 LPSECURITY_ATTRIBUTES 進(jìn)行設(shè)置。
下面通過一個例子來測試進(jìn)程句柄繼承。
代碼中出現(xiàn)的路徑,請在您的機(jī)器上做相應(yīng)的修改。
主進(jìn)程 InheritProcessHandle.exe
// InheritProcessHandle.cpp : Defines the entry point for the console application. // 測試創(chuàng)建可繼承的進(jìn)程#include "stdafx.h" #include <WINDOWS.H>int main(int argc, char* argv[]) {// 創(chuàng)建一個進(jìn)程句柄和主線程句柄可繼承的進(jìn)程ASECURITY_ATTRIBUTES saProcess, saThread;saProcess.nLength = sizeof(saProcess);saProcess.lpSecurityDescriptor = NULL;saProcess.bInheritHandle = TRUE;saThread.nLength = sizeof(saThread);saThread.lpSecurityDescriptor = NULL;saThread.bInheritHandle = TRUE;STARTUPINFO siA = {0};siA.cb = sizeof(siA);PROCESS_INFORMATION piA;char szCmd[256] = "c:\\notepad.exe";CreateProcess(NULL, szCmd, &saProcess, &saThread, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &siA, &piA);// 創(chuàng)建進(jìn)程B,繼承當(dāng)前進(jìn)程句柄表中進(jìn)程A的主線程句柄和A的進(jìn)程句柄,句柄通過命令行參數(shù)傳遞給B進(jìn)程memset(szCmd, 0, 256);sprintf(szCmd, "F:\\MyProjects\\InheritProcessHandle2\\Debug\\InheritProcessHandle2.exe %x %x", piA.hProcess, piA.hThread);STARTUPINFO siB = {0};siB.cb = sizeof(siB);PROCESS_INFORMATION piB;CreateProcess(NULL, szCmd, NULL, NULL, TRUE, CREATE_NEW_CONSOLE, NULL, NULL, &siB, &piB);//printf("error: %d\n", GetLastError());return 0; }子進(jìn)程 InheritProcessHandle2.exe
// InheritProcessHandle2.cpp : Defines the entry point for the console application. // 主進(jìn)程通過 CreateProcess 創(chuàng)建該進(jìn)程,兩個命令行參數(shù)分別表示notepad的進(jìn)程句柄和主線程句柄 // 在該進(jìn)程中繼承得到notepad的句柄,并對notepad進(jìn)行控制操作#include "stdafx.h" #include <WINDOWS.H>int main(int argc, char* argv[]) {// 獲取繼承的notepad進(jìn)程句柄和主線程句柄DWORD dwProcessHandle = -1, dwThreadHandle = -1;sscanf(argv[1], "%x", &dwProcessHandle);sscanf(argv[2], "%x", &dwThreadHandle);printf("進(jìn)程句柄: %x 主線程句柄: %x\n", dwProcessHandle, dwThreadHandle);// 掛起notepadprintf("掛起 notepad.exe 主線程5秒\n");SuspendThread((HANDLE)dwThreadHandle);Sleep(5000);printf("恢復(fù) notepad.exe 主線程.\n");ResumeThread((HANDLE)dwThreadHandle);printf("輸入0關(guān)閉 notepad.exe 進(jìn)程\n");while (getchar() != '0');TerminateProcess((HANDLE)dwProcessHandle, 1);WaitForSingleObject((HANDLE)dwProcessHandle, INFINITE);printf("notepad.exe 進(jìn)程已關(guān)閉\n");return 0; }主進(jìn)程運行結(jié)果
子進(jìn)程啟動后,notepad進(jìn)程被掛起5秒,可以看到notepad的界面已經(jīng)阻塞
5秒后notepad恢復(fù)運行
子進(jìn)程可以關(guān)閉notepad進(jìn)程,通過繼承notepad的進(jìn)程句柄。
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