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From: JD on 30 Mar 2006 10:56

"matteo" <matteo.formica(a)gmail.com> wrote in message
news:1143726028.149596.275260(a)i39g2000cwa.googlegroups.com...
> Hi all,
>
> I turned my application in a common user-mode Windows service, which
> starts at boot time.
> It works fine, but it seems I can send only predefined messages to my
> service: install, uninstall, start, stop, pause, continue...That's
> good, but I need also to send "customized messages" to the service, to
> trigger some special actions in the service.
>
> Someone knows how to interact with a service by sending user-defined
> commands/signals?
>
>
> thank you all!
>
> matt
>

Depending on the type of signal you want to send, an event is sometimes
useful. Run a thread that waits on multiple objects and fire events. Of
course, you don't get a lot of additional information carried along.

Mike P


From: Kellie Fitton on 30 Mar 2006 13:45
Hi,

You can use the function ControlServiceEx() to send controls,
however, if you want a better approach to communicate with the
service process in an efficient way, you should use named pipes:

You can communicate with the service locally and remotely.
You can have secured access methods with impersonation.
You can send and receive large messages.

Use the following APIs to create/handle/manage the named pipe:

CreateNamedPipe()
SetNamedPipeHandleState()
ConnectNamedPipe()
CreateFile()
ReadFile()
WriteFile()
CloseHandle()
ImpersonateNamedPipeClient()
RevertToSelf()

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/controlserviceex.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ipc/base/createnamedpipe.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ipc/base/setnamedpipehandlestate.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ipc/base/connectnamedpipe.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/createfile.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/readfile.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/writefile.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/closehandle.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/impersonatenamedpipeclient.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/secauthz/security/reverttoself.asp

Hope these suggestions helps,

Kellie.

From: chris_doran on 30 Mar 2006 17:44

matteo wrote:
> I try to do this, but when I send my user-defined command the service
> stops suddenly...
>
> #define SERVICE_CONTROL_CUSTOM 129
>
> ...
>
> scm = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
>
> service = OpenService(scm,
> ServiceName,
>
> SERVICE_ALL_ACCESS|SERVICE_USER_DEFINED_CONTROL);
> if (!service) ErrorHandler("OpenService", GetLastError());
>
> ...
>
> cout << "Custom command..." << endl;
> SUCCESS = ControlService(service, SERVICE_CONTROL_CUSTOM, &status);
>
> and
>
> void ServiceCtrlHandler(DWORD controlCode)
> {
> DWORD currentState = 0;
> BOOL success;
> switch(controlCode)
> {
> . . .
> case SERVICE_CONTROL_CUSTOM:
> //fai azione personalizzata!!!!
> //fopen("c:\\custom1.txt","w");
>
> currentState = SERVICE_RUNNING;
> break;
> ...
> }
>
> if I get the service status, after sending the command, it results
> STOPPED...
>
> any ideas?

Hmm. Your code looks the same as mine, which works. E-mail me if you
want a copy.

Chris

From: matteo on 3 Apr 2006 05:54
thank you all, I believe I'll use pipes...



chris_doran(a)postmaster.co.uk ha scritto:

> matteo wrote:
> > I try to do this, but when I send my user-defined command the service
> > stops suddenly...
> >
> > #define SERVICE_CONTROL_CUSTOM 129
> >
> > ...
> >
> > scm = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
> >
> > service = OpenService(scm,
> > ServiceName,
> >
> > SERVICE_ALL_ACCESS|SERVICE_USER_DEFINED_CONTROL);
> > if (!service) ErrorHandler("OpenService", GetLastError());
> >
> > ...
> >
> > cout << "Custom command..." << endl;
> > SUCCESS = ControlService(service, SERVICE_CONTROL_CUSTOM, &status);
> >
> > and
> >
> > void ServiceCtrlHandler(DWORD controlCode)
> > {
> > DWORD currentState = 0;
> > BOOL success;
> > switch(controlCode)
> > {
> > . . .
> > case SERVICE_CONTROL_CUSTOM:
> > //fai azione personalizzata!!!!
> > //fopen("c:\\custom1.txt","w");
> >
> > currentState = SERVICE_RUNNING;
> > break;
> > ...
> > }
> >
> > if I get the service status, after sending the command, it results
> > STOPPED...
> >
> > any ideas?
>
> Hmm. Your code looks the same as mine, which works. E-mail me if you
> want a copy.
>
> Chris

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