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From: jmw@tasis.utas.oz.au@munnari.oz (John Williams)
Newsgroups: comp.sys.atari.st
Subject: Did I come from the desktop?
Keywords: Shell desktop
Message-ID: <1147@diemen.cc.utas.oz>
Date: 26 Nov 89 12:29:30 GMT
Sender: root@diemen.cc.utas.oz
Lines: 25

A recent article suggested three possible methods by which a process  could
determine whether it was being run from the desktop or from a shell. I'd like
to suggest another method which works for me. I don't suggest that it is
foolproof however. It simply requires moving the basepage ptr up to its parent
until it becomes null. If this requires three iterations then the program
is running from the desktop. Any more and it is running from a shell.

The following piece of code works with MWC:

int	fromdesk()
{
	BASEPAGE	*bp;
	int		i = 0;

	bp = (BASEPAGE **) BP->p_parent;
	while (bp != 0) {
		i++;
		bp = (BASEPAGE **) bp->p_parent;
	}
	return (i == 3);
}

John M Williams
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