(ITS#5002) Windows Service: logoff causes shutdown

[mark.lakes@alcatel-lucent.com]

Full_Name: Mark Lakes
Version: 2.1.22
OS: Windows
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (198.206.187.100)


Summary: LDAP service stops when user logs off.

The LDAP server is registered as a Windows Service and works correctly with
SCM.
It is registered as an automatic service so should be running all the time.
When a user logs off from the box, the logoff triggers the service to stop
running.
This happens on WindowsXP and Windows 2003 Server that are configured on a
Domain.

I have a solution.
The problem is that despite the fact it is a service, it receives an event
called CTRL_LOGOFF_EVENT. Since it is not handling this event, the default
behavior by Windows is to shutdown the service.
Add the following code to the source at an appropriate place(probably somewhere
in ntservice.c) for when it runs as a service:

/**
	This is used to handle CTRL_LOGOFF_EVENT from shutting us down when we are
	running as a service.
        Return TRUE works. We dont really care what the crtlType is.
  */
BOOL WINAPI
WinSigHANDLER_ROUTINE(DWORD ctrlType)
{
/*
	char logstr[256];
        sprintf(logstr, "NTservice: caught signal(%d)\n", ctrlType);
        writeStatusLog(logstr);
	switch (ctrlType)
	{
	case CTRL_LOGOFF_EVENT:
...
	default:

	} */
	return TRUE;
}

Then, register the above function in the appropriate place as follows:
SetConsoleCtrlHandler(WinSigHANDLER_ROUTINE, TRUE);