win32 - service的创建
参考这篇教程：Simple Windows Service in C
安装service需要在管理员权限下运行cmd，并输入下面的命令行
C:\>sc create "My Sample Service" binPath= C:\SampleService.exe
My Sample Service是service name，可以随意更改。 后面的exe程序是我们需要执行的service，代码如下。
卸载service，输入，
C:\>sc delete "My Sample Service"
代码样例：
#include <Windows.h>#include <tchar.h>#include <wtsapi32.h>#pragma comment(lib,"Wtsapi32.lib")SERVICE_STATUS g_ServiceStatus = { 0 };SERVICE_STATUS_HANDLE g_StatusHandle = NULL;HANDLE g_ServiceStopEvent = INVALID_HANDLE_VALUE;HANDLE g_hChildStd_Rd = NULL;HANDLE g_hChildStd_Wr = NULL;VOID WINAPI ServiceMain(DWORD argc, LPTSTR* argv);VOID WINAPI ServiceCtrlHandler(DWORD);DWORD WINAPI ServiceWorkerThread(LPVOID lpParam);#define SERVICE_NAME _T("My Sample Service")int _tmain(int argc, TCHAR* argv[]){ OutputDebugString(_T("My Sample Service: Main: Entry")); SERVICE_TABLE_ENTRY ServiceTable[] = { {(LPWSTR)SERVICE_NAME, (LPSERVICE_MAIN_FUNCTION)ServiceMain}, {NULL, NULL} }; if (StartServiceCtrlDispatcher(ServiceTable) == FALSE) { OutputDebugString(_T("My Sample Service: Main: StartServiceCtrlDispatcher returned error")); return GetLastError(); } OutputDebugString(_T("My Sample Service: Main: Exit")); return 0;}VOID WINAPI ServiceMain(DWORD argc, LPTSTR* argv){ HANDLE hThread; DWORD Status = E_FAIL; OutputDebugString(_T("My Sample Service: ServiceMain: Entry")); g_StatusHandle = RegisterServiceCtrlHandler(SERVICE_NAME, ServiceCtrlHandler); if (g_StatusHandle == NULL) { OutputDebugString(_T("My Sample Service: ServiceMain: RegisterServiceCtrlHandler returned error")); goto EXIT; } // Tell the service controller we are starting ZeroMemory(&g_ServiceStatus, sizeof(g_ServiceStatus)); g_ServiceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS; g_ServiceStatus.dwControlsAccepted = 0; g_ServiceStatus.dwCurrentState = SERVICE_START_PENDING; g_ServiceStatus.dwWin32ExitCode = 0; g_ServiceStatus.dwServiceSpecificExitCode = 0; g_ServiceStatus.dwCheckPoint = 0; if (SetServiceStatus(g_StatusHandle, &g_ServiceStatus) == FALSE) { OutputDebugString(_T("My Sample Service: ServiceMain: SetServiceStatus returned error")); } /* * Perform tasks neccesary to start the service here */ OutputDebugString(_T("My Sample Service: ServiceMain: Performing Service Start Operations")); // Create stop event to wait on later. g_ServiceStopEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (g_ServiceStopEvent == NULL) { OutputDebugString(_T("My Sample Service: ServiceMain: CreateEvent(g_ServiceStopEvent) returned error")); g_ServiceStatus.dwControlsAccepted = 0; g_ServiceStatus.dwCurrentState = SERVICE_STOPPED; g_ServiceStatus.dwWin32ExitCode = GetLastError(); g_ServiceStatus.dwCheckPoint = 1; if (SetServiceStatus(g_StatusHandle, &g_ServiceStatus) == FALSE) { OutputDebugString(_T("My Sample Service: ServiceMain: SetServiceStatus returned error")); } goto EXIT; } // Tell the service controller we are started g_ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP; g_ServiceStatus.dwCurrentState = SERVICE_RUNNING; g_ServiceStatus.dwWin32ExitCode = 0; g_ServiceStatus.dwCheckPoint = 0; if (SetServiceStatus(g_StatusHandle, &g_ServiceStatus) == FALSE) { OutputDebugString(_T("My Sample Service: ServiceMain: SetServiceStatus returned error")); } // Start the thread that will perform the main task of the service hThread = CreateThread(NULL, 0, ServiceWorkerThread, NULL, 0, NULL); OutputDebugString(_T("My Sample Service: ServiceMain: Waiting for Worker Thread to complete")); // Wait until our worker thread exits effectively signaling that the service needs to stop WaitForSingleObject(hThread, INFINITE); OutputDebugString(_T("My Sample Service: ServiceMain: Worker Thread Stop Event signaled")); /* * Perform any cleanup tasks */ OutputDebugString(_T("My Sample Service: ServiceMain: Performing Cleanup Operations")); CloseHandle(g_ServiceStopEvent); g_ServiceStatus.dwControlsAccepted = 0; g_ServiceStatus.dwCurrentState = SERVICE_STOPPED; g_ServiceStatus.dwWin32ExitCode = 0; g_ServiceStatus.dwCheckPoint = 3; if (SetServiceStatus(g_StatusHandle, &g_ServiceStatus) == FALSE) { OutputDebugString(_T("My Sample Service: ServiceMain: SetServiceStatus returned error")); }EXIT: OutputDebugString(_T("My Sample Service: ServiceMain: Exit")); return;}VOID WINAPI ServiceCtrlHandler(DWORD CtrlCode){ OutputDebugString(_T("My Sample Service: ServiceCtrlHandler: Entry")); switch (CtrlCode) { case SERVICE_CONTROL_STOP: OutputDebugString(_T("My Sample Service: ServiceCtrlHandler: SERVICE_CONTROL_STOP Request")); if (g_ServiceStatus.dwCurrentState != SERVICE_RUNNING) break; /* * Perform tasks neccesary to stop the service here */ g_ServiceStatus.dwControlsAccepted = 0; g_ServiceStatus.dwCurrentState = SERVICE_STOP_PENDING; g_ServiceStatus.dwWin32ExitCode = 0; g_ServiceStatus.dwCheckPoint = 4; if (SetServiceStatus(g_StatusHandle, &g_ServiceStatus) == FALSE) { OutputDebugString(_T("My Sample Service: ServiceCtrlHandler: SetServiceStatus returned error")); } // This will signal the worker thread to start shutting down SetEvent(g_ServiceStopEvent); break; default: break; } OutputDebugString(_T("My Sample Service: ServiceCtrlHandler: Exit"));}DWORD WINAPI ServiceWorkerThread(LPVOID lpParam){ OutputDebugString(_T("My Sample Service: ServiceWorkerThread: Entry")); WCHAR station[] = L"Winsta0\\default"; SECURITY_ATTRIBUTES saAttr; saAttr.nLength = sizeof(SECURITY_ATTRIBUTES); saAttr.bInheritHandle = TRUE; saAttr.lpSecurityDescriptor = NULL; CreatePipe(&g_hChildStd_Rd, &g_hChildStd_Wr, &saAttr, 0); STARTUPINFO si; ZeroMemory(&si, sizeof(STARTUPINFO)); si.cb = sizeof(STARTUPINFO); si.hStdOutput = g_hChildStd_Wr; si.hStdError = g_hChildStd_Wr; si.lpDesktop = station; si.dwFlags = STARTF_USESTDHANDLES; PROCESS_INFORMATION pi; HANDLE hToken; bool err = WTSQueryUserToken(WTSGetActiveConsoleSessionId(), &hToken); WCHAR path[] = L"D:\\child.exe"; if (CreateProcessAsUser(hToken, path, NULL, 0, 0, true, CREATE_NO_WINDOW, 0, 0, &si, &pi)) { CloseHandle(g_hChildStd_Wr); DWORD ret = WaitForSingleObject(pi.hProcess, 2000); //wait for the child process exit. if (ret == 0) { WCHAR chBuf[100]= L"HELLO WORLD"; DWORD dwRead, dwWritten, err = ReadFile(g_hChildStd_Rd, chBuf, 100, &dwRead, NULL); HANDLE hFile = CreateFile(L"123.txt", // name of the write GENERIC_WRITE, // open for writing 0, // do not share NULL, // default security CREATE_NEW, // create new file only FILE_ATTRIBUTE_NORMAL, // normal file NULL); // no attr. template WriteFile( hFile, // open file handle chBuf, // start of data to write 100, // number of bytes to write &dwWritten, // number of bytes that were written NULL); // no overlapped structure } } // Periodically check if the service has been requested to stop while (WaitForSingleObject(g_ServiceStopEvent, 0) != WAIT_OBJECT_0) { /* * Perform main service function here */ // Simulate some work by sleeping Sleep(3000); } OutputDebugString(_T("My Sample Service: ServiceWorkerThread: Exit")); return ERROR_SUCCESS;}
在Winsta0\default中创建子进程，在service中使用CreateProcessAsUser调用子进程。
文档参考：Window Stations
如果需要service与子进程建立通信，可以使用匿名管道，代码中已经创建了管道，我没有使用它们。
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