[mod.computers.vax] IO to spooled device

egisin@WATERLOO.CSNET (Eric Gisin) (03/20/86)

How does one do IO to the primary device when a device is spooled?
I thought it was by using qio's and logical (or physical) IO,
but I can't find anything re. this in the manuals.

Is there an alternative to setting a device spooled
that prevents the login sequence and broadcast messages?
(other that allocating the device).

LEICHTER-JERRY@YALE.ARPA (03/22/86)

I don't know off-hand how you get at the device underlying a spooled device;
but:

    Is there an alternative to setting a device spooled that prevents the
    login sequence and broadcast messages?  (other that allocating the
    device).
To prevent logins on a terminal line, set the terminal line /NOTYPE_AHEAD.
To prevent broadcasts on it, set it /NOBROADCAST.  You should set these in
the permanent terminal characteristics (SET TERM/PERM - requires LOG_IO).

Note that once you've allocated the terminal from a program, you can re-enable
typeahead; characters will go to the program, not the job controller.  When
the program deallocates the terminal, the permanent characteristics will be
re-established.
							-- Jerry
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