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NT4 service's permission to access registry.

Posted on 2000-05-07
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Last Modified: 2010-04-04
Hello there,

I have written NT service... After it is installed (NT4 WS, admin login) it causes errors every time it tries to read (same with write) some data from/to system registry. Other than that it works as expected but registry is the pain. Furthermore it writes the data to the root of the HKLM dispite the key I am trying to operate at... Seems I missing something obvious am I?? Like permissions etc. Any info will be appreciated. Thanks in advance!

Art.
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Question by:_art_
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3 Comments
 
LVL 14

Expert Comment

by:DragonSlayer
ID: 2785977
some code from your programme will help others understand it better, Art.
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Expert Comment

by:mullet_attack
ID: 2786788
if you write the registry code in a normal exe, not a service, does it do as expected? maybe the problem is simply in the code, not in the fact it's a service.
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Accepted Solution

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jolla earned 50 total points
ID: 2787516
As mullet writes: Have you checked that the registry access works in a "normal" program?
I have a service that does this in the ServiceStart event:
RegKey is a global:
  RegKey = '\SOFTWARE\TT\Standin\';

var
  RegConnect: TRegistry;
begin
  RegConnect := TRegistry.Create;
  RegConnect.RootKey := HKEY_LOCAL_MACHINE;
      if RegConnect.OpenKey(RegKey, FALSE) then begin
        Datapath := RegConnect.ReadString('Datapath');
        timer1.Interval := RegConnect.ReadInteger('Intervall')*1000;
        os1.logondatabase := RegConnect.ReadString('Database');
        os1.logonusername := RegConnect.ReadString('Username');
        os1.logonpassword := RegConnect.ReadString('Password');
        RegConnect.CloseKey;
[etc]

The keys need to exist I have noticed. So in the AfterInstall event I have a similar thing that creates the keys if they do not exist.
The service management box on the NT under Startup I have marked that it should log on as System Account.


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