services.exe: Reduce Registry access to KEY_READ or MAXIMUM_ALLOWED wherever possible (try 2)

[Paul Chitescu]

On Monday 30 November 2009 05:51:35 pm Alexandre Julliard wrote:
> Paul Chitescu <paulc at voip.null.ro> writes:
> 
> > @@ -569,11 +569,11 @@ DWORD svcctl_ChangeServiceConfigW(
> >          new_entry.config.lpDisplayName = strdupW(lpDisplayName);
> >      }
> >  
> > -    *service->service_entry = new_entry;
> > -    save_service_config(service->service_entry);
> > +    err = save_service_config(&new_entry);
> > +    if (ERROR_SUCCESS == err) *service->service_entry = new_entry;
> >      service_unlock(service->service_entry);
> 
> This can't work, the strings have been freed already.
> 
> -- 
> Alexandre Julliard
> julliard at winehq.org

Oh, I see it now.

This means that currently the old strings are leaked if the new strings 
provided are NULL.

I'll write a replacement that will free the all the strings of either old 
entry or new entry at the end (depending if save_service_config succeeds or 
not).