【原创】win32 c++编写系统服务程序

首先先创建一个控制台程序，或者win32程序，都没关系。因为后台服务是看不到界面的。

服务程序应具有这样的功能：

一个服务主函数，注册服务控制句柄，启动要运行的代码。

二是服务控制函数，注册给系统，提供对服务管理程序SCM的响应，就是我的电脑-》管理里面的服务，不是有开始，停止，暂停这些功能么，这个函数就是对这个响应，停止的时候就做退出清理工作，关闭进程。

就两个函数而已。一般是ServiceMain 和ServiceCtrlHandler

这就是服务的全部必须代码了。

然后为什么别人的服务还有很多函数呢，什么 InstallService DeleteService之类的。

因为服务需要安装呀，一般一个程序写在一起，方便一点，但安装服务不是服务必须的，这必须理清楚，服务只需要一个主函数就行，安装卸载可以由其他的程序安装卸载。比如sc 或者直接操作注册表。

下面就是贴代码了

// GtServ.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "Windows.h"
#include "LogWriter.h"

SERVICE_STATUS m_ServiceStatus;
SERVICE_STATUS_HANDLE m_ServiceStatusHandle;
BOOL bRunning=true;
void WINAPI ServiceMain(DWORD argc, LPTSTR *argv);
void WINAPI ServiceCtrlHandler(DWORD Opcode);
BOOL InstallService();
BOOL DeleteService();

//log类
CLogWriter log("D:\\log.TXT");

void DoTask()
{

}

int _tmain(int argc, _TCHAR* argv[])
{

if(argc>1)
{
if( wcscmp(argv[1],L"-i")==0)
{
if(InstallService())
printf("\n Service Installed Sucessfully\n");
else
printf("\n Service has been installed\n");
}
else if(wcscmp(argv[1],L"-d")==0)
{
if(DeleteService())
printf("\n Service UnInstalled Sucessfully\n");
else
printf("\nInstalled Easin Central Service Not Found\n");
}
else
{
printf("\nUnknown Switch Usage\nFor Install use Servicetest -i\nFor UnInstall use Servicetest -d\n");
}
}
else
{
SERVICE_TABLE_ENTRY DispatchTable[]={{L"GtServ",ServiceMain},{NULL,NULL}};
StartServiceCtrlDispatcher(DispatchTable);
}

return 0;
}

void WINAPI ServiceMain(DWORD argc, LPTSTR *argv)
{
//     DWORD status;
//     DWORD specificError;
m_ServiceStatus.dwServiceType          = SERVICE_WIN32;
m_ServiceStatus.dwCurrentState         = SERVICE_START_PENDING;
m_ServiceStatus.dwControlsAccepted     = SERVICE_ACCEPT_STOP;
m_ServiceStatus.dwWin32ExitCode        = 0;
m_ServiceStatus.dwServiceSpecificExitCode = 0;
m_ServiceStatus.dwCheckPoint           = 0;
m_ServiceStatus.dwWaitHint             = 0;

m_ServiceStatusHandle = RegisterServiceCtrlHandler(L"GtServ",ServiceCtrlHandler);
if (m_ServiceStatusHandle == (SERVICE_STATUS_HANDLE)0)
{
return;
}
m_ServiceStatus.dwCurrentState         = SERVICE_RUNNING;
m_ServiceStatus.dwCheckPoint           = 0;
m_ServiceStatus.dwWaitHint             = 0;
if (!SetServiceStatus (m_ServiceStatusHandle,&m_ServiceStatus))
{
}

bRunning=true;
while(bRunning)
{
Sleep(3000);
//Place Your Code for processing here....
DoTask();
}
return;
}

void WINAPI ServiceCtrlHandler(DWORD Opcode)
{
switch(Opcode)
{
case SERVICE_CONTROL_PAUSE:
m_ServiceStatus.dwCurrentState = SERVICE_PAUSED;
break;

case SERVICE_CONTROL_CONTINUE:
m_ServiceStatus.dwCurrentState = SERVICE_RUNNING;
break;

case SERVICE_CONTROL_STOP:
m_ServiceStatus.dwWin32ExitCode = 0;
m_ServiceStatus.dwCurrentState    = SERVICE_STOPPED;
m_ServiceStatus.dwCheckPoint      = 0;
m_ServiceStatus.dwWaitHint        = 0;
SetServiceStatus (m_ServiceStatusHandle,&m_ServiceStatus);
bRunning=false;
break;

case SERVICE_CONTROL_INTERROGATE:
break;
}
return;
}
BOOL InstallService()
{
WCHAR strDir[1024];
SC_HANDLE schSCManager,schService;
GetCurrentDirectory(1024,strDir);
lstrcat(strDir,L"\\GtServ.exe");
schSCManager = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);

if (schSCManager == NULL)
return false;
LPCTSTR lpszBinaryPathName=strDir;

schService = CreateService((struct SC_HANDLE__ *)schSCManager,L"GtServ",L"GtServ",             // service name to display
SERVICE_ALL_ACCESS,          // desired access
SERVICE_WIN32_OWN_PROCESS, // service type
SERVICE_AUTO_START,        // start type
SERVICE_ERROR_NORMAL,        // error control type
lpszBinaryPathName,          // service's binary
NULL,                        // no load ordering group
NULL,                        // no tag identifier
NULL,                        // no dependencies
NULL,                        // LocalSystem account
NULL);                       // no password

if (schService == NULL)
return false;
SERVICE_DESCRIPTION   sdBuf;
sdBuf.lpDescription   =   L"GT即时同步软件后台服务";
ChangeServiceConfig2( schService, SERVICE_CONFIG_DESCRIPTION, &sdBuf);

CloseServiceHandle((struct SC_HANDLE__ *)schService);
return true;
}

BOOL DeleteService()
{
HANDLE schSCManager;
SC_HANDLE hService;
schSCManager = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS);

if (schSCManager == NULL)
return false;
hService=OpenService((struct SC_HANDLE__ *)schSCManager,L"GtServ",SERVICE_ALL_ACCESS);
if (hService == NULL)
return false;
if(DeleteService(hService)==0)
return false;
if(CloseServiceHandle(hService)==0)
return false;
else
return true;
}

这是我参考的别人的一个源码，修改了一些功能，程序安装的时候启动方式设置成自动，修改描述文字。log类不用管，和服务无关。

流程main函数-》winmain-》注册控制函数-》启动task（我们自己的代码）-》如果控制函数收到停止命令，while循环结束，服务推出。

大家还可以自己响应暂停，继续等事件。不过觉得没什么用。哈哈哈。
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