Path: utzoo!attcan!uunet!husc6!think!ames!pasteur!ucbvax!CMS1.UCS.LEEDS.AC.UK!ORG5NMC
From: ORG5NMC@CMS1.UCS.LEEDS.AC.UK
Newsgroups: comp.os.vms
Subject: (none)
Message-ID: <8805160319.AA08048@ucbvax.Berkeley.EDU>
Date: 22 Apr 88 14:12:16 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 42


Subject: Fix for PTY driver

DEC's recent SECURITY UPDATE V2 patch has broken the CMU/Hughes
PTY pseudo terminal driver. The patch to TTDRIVER.EXE has changed the default
device protection for cloned devices (e.g VTAn virtual terminals). Thus
the pseudo terminal device TPAn: receives the totally useless device protection
of [S:WRLP O: G: W:]. It used to be [S:WRLP O:WRLP G:WRLP W:WRLP].

This can be cured by adding two lines to TPDRIVER.MAR in the device UCB
initialisation procedure TP$INITLINE, AFTER default UCB initialisation
is done. Thus:

Before ...

        MOVL    UCB$L_TT_CLASS(R5), R1           ; Address class vector table
        JSB     @CLASS_SETUP_UCB(R1)             ; Init ucb fields
20$:    BBC     #UCB$V_POWER, UCB$W_STS(R5), 40$ ; Powerfail handler


After ...

        MOVL    UCB$L_TT_CLASS(R5), R1
        JSB     @CLASS_SETUP_UCB(R1)
        MovL    Ucb$L_Orb(R5), R0                ; Get Object Rights Block
        ClrW    Orb$W_Prot(R0)                   ; Restore device protection
20$:    BBC     #UCB$V_POWER, UCB$W_STS(R5), 40$


I hope someone will put this fix into the PTY driver (if not already done so)

Does anyone know why the demo PTY.PAS program that comes with the driver kit
does not work on WorkStation 2000's if your process TT device is a WTAn
window device. It hangs and refuses to bring up the login sequence. I know
that a SYS$QIOW does not complete ( the one in the infinite loop reading
the PYAn device) but for what reason? PTY.PAS works on the workstations
TTA2 line.

Regards

Tony Cook  (ORAC Ltd  LEEDS England)
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