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delphi, Win8 and Services

Posted on 2014-04-28
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Last Modified: 2014-05-14
Hi

I have the following code in a service:
   h_manager := OpenSCManager(PChar(Machine), nil, SC_MANAGER_CONNECT);
   if h_manager > 0 then
   begin
     h_svc := OpenService(h_manager, PChar(ServiceName),
       SERVICE_START or SERVICE_QUERY_STATUS or SERVICE_ALL_ACCESS);
     if h_svc > 0 then
     begin
     end;
  end;

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If I compile it with D XE2 and run it on a Win7-machine, h_svc  has a correct value and I can work with it. If I compile it in D XE5 and run it on a Win8-machine (I changed my developpement-machine), h_svc is alway zero. If I only have QUERY_STATUS as Parameter it is ok. So I guess that this is a policy-problem. (btw: the service is SQL Server) How can I solve this? Thanks for every hint, Peter
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Question by:formi
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Expert Comment

by:Sinisa Vuk
ID: 40028133
I think so too. Why you need SERVICE_ALL_ACCESS? what do you need to do with this service? Maybe you can add SERVICE_STOP and SERVICE_PAUSE_CONTINUE and probably need to extended sc manager access with some of
  SC_MANAGER_CONNECT             = $0001;
  SC_MANAGER_CREATE_SERVICE      = $0002;
  SC_MANAGER_ENUMERATE_SERVICE   = $0004;
  SC_MANAGER_LOCK                = $0008;
  SC_MANAGER_QUERY_LOCK_STATUS   = $0010;
  SC_MANAGER_MODIFY_BOOT_CONFIG  = $0020;

  SC_MANAGER_ALL_ACCESS          = (STANDARD_RIGHTS_REQUIRED or
                                    SC_MANAGER_CONNECT or
                                    SC_MANAGER_CREATE_SERVICE or
                                    SC_MANAGER_ENUMERATE_SERVICE or
                                    SC_MANAGER_LOCK or
                                    SC_MANAGER_QUERY_LOCK_STATUS or
                                    SC_MANAGER_MODIFY_BOOT_CONFIG);

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Author Comment

by:formi
ID: 40029104
You may be right all Access is not necessary, but I want to start/stop the service and SERVICE_START does not work.
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LVL 28

Expert Comment

by:Sinisa Vuk
ID: 40029119
Try (SERVICE_START + SERVICE_STOP + SERVICE_INTERROGATE)
Constants from : http://msdn.microsoft.com/en-us/library/ms685981%28v=VS.85%29.aspx

If it fail again - get returning error code  
...
h_svc := OpenService(h_manager, PChar(ServiceName),
       SERVICE_START or SERVICE_QUERY_STATUS or SERVICE_ALL_ACCESS);
     if h_svc > 0 then
     begin
     end
     else
     begin
        RaiseLastOsError(); ///or ger error code with GetLastError.
     end;

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more info: http://msdn.microsoft.com/en-us/library/ms686321%28v=vs.85%29.aspx
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Author Comment

by:formi
ID: 40062877
Unfortunately it didn't help. I can not start/stop Services. Any other ideas?
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LVL 28

Expert Comment

by:Sinisa Vuk
ID: 40062972
Did you get error code? (using RaiseLastOsError or
ShowMessage('Error: '+ SysErrorMessage(GetLastError)) ;

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Author Comment

by:formi
ID: 40063763
The message is "Access denied". I now tried to install the Service manually and I get the same error. If I open a cmd-window "as Administrator" I can install it. So the question is how can I run a program "as administrator" in the IDE to debug it?
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Accepted Solution

by:
Sinisa Vuk earned 2000 total points
ID: 40063770
Quite easy - impersonate current user - this blogs show you how:
http://www.michael-puff.de/Programmierung/Delphi/Code-Snippets/Impersonate.shtml
http://www.delphibasics.info/home/delphibasicssnippets/impersonateuser

...never tried - but maybe if you run delphi ide as admin .. childe process (your app) should be run as admin too.
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Author Closing Comment

by:formi
ID: 40063828
Thanks, that really works: running the IDE as admin.
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