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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

299.0. "Duplicate Displays ..." by RDGE28::BADMAN (The mind behind the faces) Thu Aug 28 1986 15:20

    I wonder if anybody could supply a few hints/tips on how to do the
    following :
    
    Two processes, two terminals:
    
    Process A's terminal displays whatever process B's terminal shows,
    AS IT HAPPENS.
    
    The method should preferably be in a way such that process B is
    unaware of anything happening AND the routine should only work
    on the consent of the owner of process B.
    
    I think this is clear; if user B types 'dir', then presses return,
    his display will show 'dir' then a dump of his directory contents.
    At the same time, on user A's screen, the same display will be seen.
    
    
    						Any good ideas ?
    
    
    							Jamie.
T.RTitleUserPersonal
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299.1Been done outside DEC16513::SYSTEMThu Aug 28 1986 21:3612
    Hmmm...
    
    I've daisychained VT241's using rgb coax...  8^)
    
    How would you suggest that Process B grant permission to
    Process A?
    
    I assume that the permission could also be revoked?
    
    There are various third party utilities to do this.
    
    Scott Hesterman
299.21984VAXWRK::NORDLINGERTue Sep 02 1986 11:5916
	One third party program that succeeded in displaying the
	Type ahead buffer was Control, however it occasionally
	crashed the system. 
              Later versions may not have that "feature" :^).
	I am under the impression things changed such that 
        UCB+TT_TYPAHD no longer points to the buffer containing 
        the users immediate input, rather the recall command buffer.
        You have ahead of you a merry chase to try to find the
	correct offsets, the easy thing is just to see how 
	TTdriver does it ;^).
	     Incidentally I received a call from a university 
        in NJ that had put hooks into mail "to study how people
	communicate" and wanted to do the same for phone. This
	is the type of thing hackers would do well to discourage!

	John  (Willing_to_discuss_further_off_line)