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{
$Id: header,v 1.1 2000/07/13 06:33:45 michael Exp $
This file is part of the Free Component Library (FCL)
Copyright (c) 1999-2000 by the Free Pascal development team
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
{ System dependent service stuff }
uses baseunix;
Resourcestring
SErrFailedToFork = 'Failed to fork daemon process.';
procedure DaemonizeProgram;
var pid, sid : TPid;
begin
pid := FpFork;
if (pid<0) then
raise Exception.Create(SErrFailedToFork);
if pid>0 then
begin
// We are now in the main program, which has to terminate
FpExit(0);
end
else
begin
// Here we are in the daemonized proces
sid := FpSetsid;
if sid < 0 then
raise Exception.Create(SErrFailedToFork);
// Reset the file-mask
FpUmask(0);
// Change the current directory, to avoid locking the current directory
chdir('/');
FpClose(StdInputHandle);
FpClose(StdOutputHandle);
FpClose(StdErrorHandle);
end;
end;
{ ---------------------------------------------------------------------
TCustomDaemonApplication
---------------------------------------------------------------------}
Const
SERVICE_CONTROL_STOP = $00000001;
SERVICE_CONTROL_PAUSE = $00000002;
SERVICE_CONTROL_CONTINUE = $00000003;
SERVICE_CONTROL_INTERROGATE = $00000004;
SERVICE_CONTROL_SHUTDOWN = $00000005;
function TCustomDaemonApplication.RunGUIloop(P: Pointer): integer;
begin
end;
procedure TCustomDaemonApplication.SysInstallDaemon(Daemon: TCustomDaemon);
begin
end;
procedure TCustomDaemonApplication.SysUnInstallDaemon(Daemon: TCustomDaemon);
begin
end;
procedure TCustomDaemonApplication.SysStartUnInstallDaemons;
begin
end;
procedure TCustomDaemonApplication.SysEndUnInstallDaemons;
begin
end;
procedure TCustomDaemonApplication.SysStartInstallDaemons;
begin
end;
procedure TCustomDaemonApplication.SysEndInstallDaemons;
begin
end;
procedure TCustomDaemonApplication.SysStartRunDaemons;
begin
end;
procedure TCustomDaemonApplication.SysEndRunDaemons;
Var
I : Integer;
DC : TDaemonController;
begin
if Application.HasOption('b','background') then
DaemonizeProgram;
For I:=ComponentCount-1 downto 0 do
If Components[i] is TDaemoncontroller then
begin
DC:=Components[i] as TDaemoncontroller;
DC.Main(0,Nil); // Returns after starting thread.
end;
if Assigned(GUIMainLoop) then
GuiMainLoop
else
// Simply wait till everything terminates.
While Not Terminated do
fpPause;
end;
procedure TCustomDaemonApplication.RemoveController(
AController: TDaemonController);
Var
I : Integer;
HC : Boolean;
begin
FreeAndNil(AController.FDaemon);
AController.Free;
end;
{ ---------------------------------------------------------------------
TDaemonThread
---------------------------------------------------------------------}
procedure TDaemonThread.StartServiceExecute;
begin
end;
procedure TDaemonThread.CheckControlMessage(WaitForMessage : Boolean);
begin
If WaitForMessage then // Don't hog CPU.
Sleep(50);
end;
{ ---------------------------------------------------------------------
TDaemonController
---------------------------------------------------------------------}
procedure TDaemonController.StartService;
begin
Main(0,Nil);
end;
procedure TDaemonController.Main(Argc: DWord; Args: PPChar);
Var
T : TThread;
begin
FDaemon.Status:=csStartPending;
Try
T:=TDaemonThread.Create(FDaemon);
T.FreeOnTerminate:=True;
T.Resume;
T.WaitFor;
FDaemon.FThread:=Nil;
except
On E : Exception do
FDaemon.Logmessage(Format(SErrDaemonStartFailed,[FDaemon.Definition.Name,E.Message]));
end;
end;
procedure TDaemonController.Controller(ControlCode, EventType: DWord;
EventData: Pointer);
begin
// Send control code to daemon thread.
TDaemonThread(Daemon.DaemonThread).HandleControlCode(ControlCode);
end;
function TDaemonController.ReportStatus: Boolean;
Var
S : String;
begin
S:='';
If Assigned(FDaemon) then
With FDaemon do
S:=Format(SDaemonStatus,[Definition.DisplayName,
CurrentStatusNames[Status]]);
Application.Log(etInfo,S);
end;
{ ---------------------------------------------------------------------
Global initialization/Finalization
---------------------------------------------------------------------}
Procedure DoShutDown(Sig : Longint; Info : PSigInfo; Context : PSigContext); cdecl;
begin
Application.StopDaemons(True);
Application.Terminate;
end;
Procedure SysInitDaemonApp;
Var
old,new : SigactionRec;
begin
New.sa_handler:=@DoShutDown;
fpSigaction(SIGQUIT,@New,@Old);
fpSigaction(SIGTERM,@New,@Old);
fpSigaction(SIGINT,@New,@Old);
end;
Procedure SysDoneDaemonApp;
begin
end;
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