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Conference noted::hackers_v1

Title:	-={ H A C K E R S }=-
Notice:	Write locked - see NOTED::HACKERS
Moderator:	DIEHRD::MORRIS

Created:	Thu Feb 20 1986
Last Modified:	Mon Aug 03 1992
Last Successful Update:	Fri Jun 06 1997
Number of topics:	680
Total number of notes:	5456

50.0. "Terminals/mailboxes" by GLIVET::DIAMOND () Thu Aug 23 1984 09:42

Maybe someone out here can tell me...

How do you deassign a mailbox from a terminal that you previously assigned in 
supervisor mode?  I've got a program that sets up broadcasts to go to this 
mailbox even after image exit (hence the supervisor mode).  Then when I go
back later to delete the mailbox mailbox, I first deassign the terminal
(again, in supervisor mode).  But the mailbox won't go away because the 
terminal never deassigns and the mailbox is still assigned to it.

Other symptoms are that I get "device active" errors when trying to use SET 
HOST, SPAWN/WAIT, or WHAT.

Any suggestions as to what I may not be doing to correctly deassign the 
terminal?

Dave

T.R	Title	User	Date	Lines
50.1		ROYCE::KENNEDY	`Thu Aug 23 1984 19:24`	12
	I think that your problem is that the mailbox/terminal connection isn't being broken. You could experiment by saying SET /NOBRDCSTMBX to DCL. The assignment may be removed by a SETMODE QIO to the terminal with TT2$M_BRDCSTMBX off (See chapter 9 in the I/O Users Guide Vol 1). The mailbox should then be deletable. The reason why WHAT was giving an error is that it uses a broadcast mailbox and only one may exist per terminal at a time. Good Luck Hugh.
50.2		TURTLE::GILBERT	`Thu Aug 23 1984 16:28`	15
	Is there any good reason why only one mailbox may be associated with a terminal at a time? You could either put in a Y-valve to direct associated messages to all the mailboxes, or a switch to direct them to the desired mailboxes, or a combination of both (if this were handled by LIB$ASN_WTH_MBX, which is used by (almost?) all the mentioned utilities, the problem would gracefully disappear. - Gilbert For what it's worth, I ran into this problem after trying: $ SPAWN/NOWAIT SET HOST node Which is a really neat hack that can be used like spawn/attach on a single node. It should should suffice until someone hacks RTPAD to do this more cleanly. You'll probably want to define some DCL symbols as "WAIT 00:02:00".
50.3		GLIVET::DIAMOND	`Thu Aug 23 1984 16:59`	11
	When I try to remove the mailbox from the terminal, I also set brdcstmbx and broadcast flags back the way they should be, off and on respectively. What I don't understand is how to deassign the set. I'm just so confused... . . . . . Dave
50.4		HARE::STAN	`Thu Aug 23 1984 18:13`	2
	What has this got to do with hacking? It sounds like a serious problem. Use the VMSNOTES note file if you want a serious answer.
50.5		GLIVET::DIAMOND	`Thu Aug 23 1984 20:51`	4
	I've got queries all over the place... What I'm looking for is not a certain place to find certain answers, but certain people who might have my answers. Dave
50.6		GLIVET::DIAMOND	`Thu Aug 23 1984 21:02`	10
	Aha, he said!! What I failed to remember is that when you assign or deassign anything, the device is given a special something to keep for the rest of its life. And that something is a channel number. What idiot moi failed to remember is that the deassign is based also on the channel number, so I have to store the channel number used for the assign and use the same one for the deassign. I can't believe it took me this long to figure it out after losing so many hours of sleep, and thanks to those who listened to me babble about it. Dave
50.7		VANNOY::VANNOY	`Tue Sep 04 1984 17:44`	6
	RE: .2 VMS has a one mailbox per terminal restriction. We thought we might fix this in V4, but never got around to it. Maybe next time around... jake