// 重启指定服务
void CPSSDPrinterCtrlPlug::RestartService(const wchar_t* nswServiceName)
{
SC_HANDLE schSCManager = NULL;
SC_HANDLE schService = NULL;
do
{
// -------------------------------------------------------------------------------------------------------------------------
// open
// Get a handle to the SCM database.
schSCManager = OpenSCManager(
NULL, // local computer
NULL, // ServicesActive database
SC_MANAGER_ALL_ACCESS); // full access rights
if (NULL == schSCManager)
{
DebugWrite(L"ERROR——————OpenSCManager failed (%d)\n", GetLastError());
break;
}
// Get a handle to the service.
schService = OpenService(
schSCManager, // SCM database
nswServiceName, // name of service
SERVICE_CHANGE_CONFIG); // need change config access
if (schService == NULL)
{
DebugWrite(L"ERROR——————OpenService failed (%d)\n", GetLastError());
break;
}
// -------------------------------------------------------------------------------------------------------------------------
// stop
// Make sure the service is not already stopped.
DWORD dwBytesNeeded;
SERVICE_STATUS_PROCESS ssp;
if ( !QueryServiceStatusEx( schService, SC_STATUS_PROCESS_INFO, (LPBYTE)&ssp, sizeof(SERVICE_STATUS_PROCESS),
&dwBytesNeeded ) )
{
DebugWrite(L"ERROR——————QueryServiceStatusEx failed (%d)\n", GetLastError());
break;
}
if ( ssp.dwCurrentState != SERVICE_STOPPED || SERVICE_STOP_PENDING == ssp.dwCurrentState)
break;
{
DebugWrite(L"ERROR——————Service is already stopped.\n");
break;
}
// Send a stop code to the service.
if ( !ControlService(schService, SERVICE_CONTROL_STOP, (LPSERVICE_STATUS) &ssp ) )
{
DebugWrite(L"ERROR——————ControlService failed (%d)\n", GetLastError() );
break;
}
// Wait for the service to stop.
DWORD dwStartTime = GetTickCount();
DWORD dwTimeout = 30000; // 30-second time-out
while ( ssp.dwCurrentState != SERVICE_STOPPED )
{
Sleep( ssp.dwWaitHint );
if ( !QueryServiceStatusEx(schService, SC_STATUS_PROCESS_INFO, (LPBYTE)&ssp, sizeof(SERVICE_STATUS_PROCESS), &dwBytesNeeded ) )
{
DebugWrite(L"ERROR——————QueryServiceStatusEx failed (%d)\n", GetLastError() );
break;
}
if ( ssp.dwCurrentState == SERVICE_STOPPED )
break;
if ( GetTickCount() - dwStartTime > dwTimeout )
{
DebugWrite(L"ERROR——————Wait timed out\n" );
break;
}
}
if(ssp.dwCurrentState != SERVICE_STOPPED)
break;
// -------------------------------------------------------------------------------------------------------------------------
// start
// Attempt to start the service.
if (!StartService(schService, // handle to service
0, // number of arguments
NULL) ) // no arguments
{
DebugWrite(L"ERROR——————StartService failed (%d)\n", GetLastError());
break;
}
// Check the status until the service is no longer start pending.
SERVICE_STATUS_PROCESS ssStatus;
if (!QueryServiceStatusEx(
schService, // handle to service
SC_STATUS_PROCESS_INFO, // info level
(LPBYTE) &ssStatus, // address of structure
sizeof(SERVICE_STATUS_PROCESS), // size of structure
&dwBytesNeeded ) ) // if buffer too small
{
DebugWrite(L"ERROR——————QueryServiceStatusEx failed (%d)\n", GetLastError());
break;
}
// Save the tick count and initial checkpoint.
dwStartTime = GetTickCount();
DWORD dwWaitTime;
DWORD dwOldCheckPoint = ssStatus.dwCheckPoint;
while (ssStatus.dwCurrentState == SERVICE_START_PENDING)
{
// Do not wait longer than the wait hint. A good interval is
// one-tenth the wait hint, but no less than 1 second and no
// more than 10 seconds.
dwWaitTime = ssStatus.dwWaitHint / 10;
if( dwWaitTime < 1000 )
dwWaitTime = 1000;
else if ( dwWaitTime > 10000 )
dwWaitTime = 10000;
Sleep( dwWaitTime );
// Check the status again.
if (!QueryServiceStatusEx(
schService, // handle to service
SC_STATUS_PROCESS_INFO, // info level
(LPBYTE) &ssStatus, // address of structure
sizeof(SERVICE_STATUS_PROCESS), // size of structure
&dwBytesNeeded ) ) // if buffer too small
{
DebugWrite(L"ERROR——————QueryServiceStatusEx failed (%d)\n", GetLastError());
break;
}
if ( ssStatus.dwCheckPoint > dwOldCheckPoint )
{
// The service is making progress.
dwStartTime = GetTickCount();
dwOldCheckPoint = ssStatus.dwCheckPoint;
}
else
{
if(GetTickCount()- dwStartTime > ssStatus.dwWaitHint)
{
// No progress made within the wait hint.
break;
}
}
}
// Determine whether the service is running
if (ssStatus.dwCurrentState != SERVICE_RUNNING)
{
DebugWrite(L"ERROR——————start spooler failed (%d)\n", GetLastError());
//printf("Service not started. \n");
//printf(" Current State: %d\n", ssStatus.dwCurrentState);
//printf(" Exit Code: %d\n", ssStatus.dwWin32ExitCode);
//printf(" Check Point: %d\n", ssStatus.dwCheckPoint);
//printf(" Wait Hint: %d\n", ssStatus.dwWaitHint);
}
}while(false);
if(NULL != schService)
CloseServiceHandle(schService);
if(NULL != schSCManager)
CloseServiceHandle(schSCManager);
}
