{
The following class TServiceManager can be used to manage your NT-Services.
You can do things like start, stop, pause or querying a services status.
}
{
Die folgende Klasse TServiceManager kann verwendet werden, um NT-Dienste
zu verwalten. Hierbei gibt es Funktionen wie Start, Stop, Pause sowie
Statusabfragen.
}
// Thanks for this one to Frederik Schaller as well - it's a co-work }
unit ServiceManager;
interface
uses
SysUtils, Windows, WinSvc;
type
TServiceManager = class
private
{ Private declarations }
ServiceControlManager: SC_Handle;
ServiceHandle: SC_Handle;
protected
function DoStartService(NumberOfArgument: DWORD; ServiceArgVectors: PChar): Boolean;
public
{ Public declarations }
function Connect(MachineName: PChar = nil; DatabaseName: PChar = nil;
Access: DWORD = SC_MANAGER_ALL_ACCESS): Boolean; // Access may be SC_MANAGER_ALL_ACCESS
function OpenServiceConnection(ServiceName: PChar): Boolean;
function StartService: Boolean; overload; // Simple start
function StartService(NumberOfArgument: DWORD; ServiceArgVectors: PChar): Boolean;
overload; // More complex start
function StopService: Boolean;
procedure PauseService;
procedure ContinueService;
procedure ShutdownService;
procedure DisableService;
function GetStatus: DWORD;
function ServiceRunning: Boolean;
function ServiceStopped: Boolean;
end;
implementation
{ TServiceManager }
function TServiceManager.Connect(MachineName, DatabaseName: PChar;
Access: DWORD): Boolean;
begin
Result := False;
{ open a connection to the windows service manager }
ServiceControlManager := OpenSCManager(MachineName, DatabaseName, Access);
Result := (ServiceControlManager <> 0);
end;
function TServiceManager.OpenServiceConnection(ServiceName: PChar): Boolean;
begin
Result := False;
{ open a connetcion to a specific service }
ServiceHandle := OpenService(ServiceControlManager, ServiceName, SERVICE_ALL_ACCESS);
Result := (ServiceHandle <> 0);
end;
procedure TServiceManager.PauseService;
var
ServiceStatus: TServiceStatus;
begin
{ Pause the service: attention not supported by all services }
ControlService(ServiceHandle, SERVICE_CONTROL_PAUSE, ServiceStatus);
end;
function TServiceManager.StopService: Boolean;
var
ServiceStatus: TServiceStatus;
begin
{ Stop the service }
Result := ControlService(ServiceHandle, SERVICE_CONTROL_STOP, ServiceStatus);
end;
procedure TServiceManager.ContinueService;
var
ServiceStatus: TServiceStatus;
begin
{ Continue the service after a pause: attention not supported by all services }
ControlService(ServiceHandle, SERVICE_CONTROL_CONTINUE, ServiceStatus);
end;
procedure TServiceManager.ShutdownService;
var
ServiceStatus: TServiceStatus;
begin
{ Shut service down: attention not supported by all services }
ControlService(ServiceHandle, SERVICE_CONTROL_SHUTDOWN, ServiceStatus);
end;
function TServiceManager.StartService: Boolean;
begin
Result := DoStartService(0, '');
end;
function TServiceManager.StartService(NumberOfArgument: DWORD;
ServiceArgVectors: PChar): Boolean;
begin
Result := DoStartService(NumberOfArgument, ServiceArgVectors);
end;
function TServiceManager.GetStatus: DWORD;
var
ServiceStatus: TServiceStatus;
begin
{ Returns the status of the service. Maybe you want to check this
more than once, so just call this function again.
Results may be: SERVICE_STOPPED
SERVICE_START_PENDING
SERVICE_STOP_PENDING
SERVICE_RUNNING
SERVICE_CONTINUE_PENDING
SERVICE_PAUSE_PENDING
SERVICE_PAUSED }
Result := 0;
QueryServiceStatus(ServiceHandle, ServiceStatus);
Result := ServiceStatus.dwCurrentState;
end;
procedure TServiceManager.DisableService;
begin
{ Implementation is following... }
end;
function TServiceManager.ServiceRunning: Boolean;
begin
Result := (GetStatus = SERVICE_RUNNING);
end;
function TServiceManager.ServiceStopped: Boolean;
begin
Result := (GetStatus = SERVICE_STOPPED);
end;
function TServiceManager.DoStartService(NumberOfArgument: DWORD;
ServiceArgVectors: PChar): Boolean;
var
err: integer;
begin
Result := WinSvc.StartService(ServiceHandle, NumberOfArgument, ServiceArgVectors);
end;
end.
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