| Subject | Re: Operating system directive OpenProcess failed (sometimes CreateEvent failed) |
|---|---|
| Author | somusque |
| Post date | 2011-01-05T22:50:12Z |
Hello,
I found the cause but still need a solution.
Sometimes my program has to switch the user context using
LogonUserW and ImpersonateLoggedOnUser (Win32 API).
After that, the Embedded Firebird server can't open database files any more. I will investigate if I can give the new user full control over handles created by the initial user, but if there are any hints I would be grateful.
Maybe I should detach the DLL before switching user context and then attach it again? But how to do that with IBO ... also I sometimes need to run different threads in the same process under different user accounts. Sounds terrible, but it is actually quite straightforward under Windows.
Cheers,
Tobias
I found the cause but still need a solution.
Sometimes my program has to switch the user context using
LogonUserW and ImpersonateLoggedOnUser (Win32 API).
After that, the Embedded Firebird server can't open database files any more. I will investigate if I can give the new user full control over handles created by the initial user, but if there are any hints I would be grateful.
Maybe I should detach the DLL before switching user context and then attach it again? But how to do that with IBO ... also I sometimes need to run different threads in the same process under different user accounts. Sounds terrible, but it is actually quite straightforward under Windows.
Cheers,
Tobias