(Root) Preexec close: exit code?

[werner maes]

Hello,

What exactly is this return code and when is it different from zero?
I mean what determines what will be the return code?

>From help smb.conf:

Preexec close = yes

"This boolean option controls whether a non-zero return code from
"preexec" should     close the service being connected to. "

I'm trying to use this to avoid several logons from the same student on
different pc's.

Thanks,

Werner Maes