我们看到了360主动防御服务和google更新服务等，让我们来编写一个简单的服务吧。
以下是一个简单的Windows服务示例，使用C语言编写。这个服务会定期监控并记录系统的可用内存，并将结果写入日志文件。
#include#include // 定义睡眠时间，单位为毫秒
define SLEEP_TIME 1000
// 定义日志文件路径
define FILE_PATH "D:\test.txt"
// 服务状态 SERVICE_STATUS m_ServiceState; // 服务状态句柄 SERVICE_STATUS_HANDLE m_ServiceHandle;
void WINAPI ServiceMain(int argc, char* argv); void WINAPI ServiceCtrlHandler(DWORD Opcode); int WriteToLog(char str);
BOOL bRunning;
int main() { SERVICE_TABLE_ENTRY stentry[2]; stentry[0].lpServiceName = "demo"; stentry[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTIONA)ServiceMain; // 服务的最后一项要设置为NULL stentry[1].lpServiceName = NULL; stentry[1].lpServiceProc = NULL;
StartServiceCtrlDispatcher(stentry); // system("pause"); return 0;}
// 服务主函数 void WINAPI ServiceMain(int argc, char** argv) { MEMORYSTATUS memstatus; char str[100]; int availMem;
// 服务类型和状态 m_ServiceState.dwServiceType = SERVICE_WIN32; m_ServiceState.dwCurrentState = SERVICE_START_PENDING; m_ServiceState.dwControlsAccepted = SERVICE_CONTROL_SHUTDOWN | SERVICE_CONTROL_STOP; m_ServiceState.dwWin32ExitCode = 0; m_ServiceState.dwServiceSpecificExitCode = 0; // 下面这两个基本不需要，除非服务启动时间很长 m_ServiceState.dwCheckPoint = 0; m_ServiceState.dwWaitHint = 0; // 注册服务控制函数 m_ServiceHandle = RegisterServiceCtrlHandler("demo", (LPHANDLER_FUNCTION)ServiceCtrlHandler); if (m_ServiceHandle == NULL) { WriteToLog("RegisterServiceCtrlHandler failed"); return; } WriteToLog("RegisterServiceCtrlHandler success"); // 更新服务状态 m_ServiceState.dwCurrentState = SERVICE_RUNNING; SetServiceStatus(m_ServiceHandle, &m_ServiceState); memset(str, '\0', 100); bRunning = TRUE; while (bRunning) { GlobalMemoryStatus(&memstatus); availMem = memstatus.dwAvailVirtual / 1024 / 1024; sprintf_s(str, 50, "available memory is %d MB, use %d %%", availMem, memstatus.dwMemoryLoad); WriteToLog(str); Sleep(SLEEP_TIME); } WriteToLog("service stop!");}
// 服务控制函数(启动，暂停等) void WINAPI ServiceCtrlHandler(DWORD Opcode) { switch (Opcode) { case SERVICE_CONTROL_STOP: bRunning = FALSE; m_ServiceState.dwCurrentState = SERVICE_STOPPED; break; case SERVICE_CONTROL_SHUTDOWN: bRunning = FALSE; m_ServiceState.dwCurrentState = SERVICE_STOPPED; break; default: break; } SetServiceStatus(m_ServiceHandle, &m_ServiceState); }
int WriteToLog(char str) { FILE pFile; fopen_s(&pFile, FILE_PATH, "a+"); fprintf_s(pFile, "%s\n", str); fclose(pFile); return 0; }
编译并生成后，可以使用
sc命令来安装服务：sc create giantbranchDemo binpath= D:\demo.exe
安装后，可以在服务管理界面看到新安装的服务：
您可以从图形界面启动服务，也可以通过
sc命令启动、停止和删除服务：
启动、停止和删除服务的命令如下：
sc start sc stop sc delete如果程序本身自带启动和删除功能，可以使用以下代码：
#includeinclude
// 定义睡眠时间，单位为毫秒
define SLEEP_TIME 1000
// 定义日志文件路径
define FILE_PATH "C:\test.txt"
define SERVICENAME "practice"
// 服务状态 SERVICE_STATUS m_ServiceState; // 服务状态句柄 SERVICE_STATUS_HANDLE m_ServiceHandle;
void WINAPI ServiceMain(int argc, char* argv); void WINAPI ServiceCtrlHandler(DWORD Opcode); int WriteToLog(char str); BOOL InstallService(); void DelService();
BOOL bRunning;
int main(int argc, char** argv[]) { SERVICE_TABLE_ENTRY stentry[2]; if (argc == 2) { if (!strcmp(argv[1], "-i")) { InstallService(); } else if (!strcmp(argv[1], "-d")) { DelService(); } return 0; }
stentry[0].lpServiceName = SERVICENAME; stentry[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTIONA)ServiceMain; // 服务的最后一项要设置为NULL stentry[1].lpServiceName = NULL; stentry[1].lpServiceProc = NULL; StartServiceCtrlDispatcher(stentry); return 0;}
// 服务主函数 void WINAPI ServiceMain(int argc, char** argv) { MEMORYSTATUS memstatus; char str[100]; int availMem;
// 服务类型和状态 m_ServiceState.dwServiceType = SERVICE_WIN32; m_ServiceState.dwCurrentState = SERVICE_START_PENDING; m_ServiceState.dwControlsAccepted = SERVICE_CONTROL_SHUTDOWN | SERVICE_CONTROL_STOP; m_ServiceState.dwWin32ExitCode = 0; m_ServiceState.dwServiceSpecificExitCode = 0; // 下面这两个基本不需要，除非服务启动时间很长 m_ServiceState.dwCheckPoint = 0; m_ServiceState.dwWaitHint = 0; // 注册服务控制函数 m_ServiceHandle = RegisterServiceCtrlHandler(SERVICENAME, (LPHANDLER_FUNCTION)ServiceCtrlHandler); if (m_ServiceHandle == NULL) { WriteToLog("RegisterServiceCtrlHandler failed"); return; } WriteToLog("RegisterServiceCtrlHandler success"); // 更新服务状态 m_ServiceState.dwCurrentState = SERVICE_RUNNING; SetServiceStatus(m_ServiceHandle, &m_ServiceState); memset(str, '\0', 100); bRunning = TRUE; GlobalMemoryStatus(&memstatus); availMem = memstatus.dwAvailVirtual / 1024 / 1024; sprintf_s(str, 50, "available memory is %d MB, use %d %%", availMem, memstatus.dwMemoryLoad); WriteToLog(str); WriteToLog("service is Running!");}
// 服务控制函数(启动，暂停等) void WINAPI ServiceCtrlHandler(DWORD Opcode) { switch (Opcode) { case SERVICE_CONTROL_STOP: case SERVICE_CONTROL_SHUTDOWN: bRunning = FALSE; m_ServiceState.dwWin32ExitCode = 0; m_ServiceState.dwCurrentState = SERVICE_STOPPED; break; default: break; } SetServiceStatus(m_ServiceHandle, &m_ServiceState); }
int WriteToLog(char str) { FILE pFile; fopen_s(&pFile, FILE_PATH, "a+"); fprintf_s(pFile, "%s\n", str); fclose(pFile); return 0; }
BOOL InstallService() { char strDir[1024]; SC_HANDLE scHandler, schService; LPCTSTR lpszBinaryPathName;
// GetCurrentDirectory(1024, strDir); GetModuleFileName(NULL, strDir, 1024); printf("%s\n", strDir); lpszBinaryPathName = strDir; scHandler = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); if (scHandler == NULL) { printf("open scmanager failed! May be you don't have the privilage?"); } schService = CreateService( scHandler, SERVICENAME, SERVICENAME, SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL, lpszBinaryPathName, NULL, NULL, NULL, NULL, NULL ); if (schService == NULL) { printf("create service failed~"); return FALSE; } CloseServiceHandle(schService); CloseServiceHandle(scHandler); return TRUE;}
void DelService() { SC_HANDLE scHandler; SC_HANDLE schService; SERVICE_STATUS status; BOOL isSuccess; DWORD errCode;
scHandler = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); if (scHandler == NULL) { printf("open scmanager failed! May be you don't have the privilage?"); return; } schService = OpenService(scHandler, SERVICENAME, SC_MANAGER_ALL_ACCESS | DELETE); if (schService == NULL) { errCode = GetLastError(); printf("OpenService failed! code：%d\n", errCode); return; } isSuccess = QueryServiceStatus(schService, &status); if (!isSuccess) { printf("QueryServiceStatus failed!"); return; } if (status.dwCurrentState != SERVICE_STOPPED) { isSuccess = ControlService(schService, SERVICE_CONTROL_STOP, &status); if (!isSuccess) { printf("Stop Service failed!"); return; } } isSuccess = DeleteService(schService); if (!isSuccess) { printf("DeleteService failed"); return; } else { printf("DeleteService success"); } CloseServiceHandle(scHandler); CloseServiceHandle(schService);}
这样，您就可以通过命令行参数
-i和-d来安装和删除服务了。
