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1994-07-12
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CKDKER.BWR "Beware File" for C-Kermit Version 5A -*- text -*-
AOS/VS VERSION
Applies to 5A(190)
Last update: Wed Jul 13 09:05:56 1994
Authors: Frank da Cruz, Christine M. Gianone, Columbia University.
Copyright (C) 1985, 1994, Trustees of Columbia University in the City of New
York. Permission is granted to any individual or institution to use this
software as long as it is not sold for profit. This copyright notice must be
retained. This software may not be included in commercial products without
written permission of Columbia University.
Report problems, suggestions, fixes, etc, to Frank da Cruz:
Internet: fdc@watsun.cc.columbia.edu (or) fdc@columbia.edu
BITNET/EARN: FDCCU@CUVMA
Columbia University Academic Information Systems
612 West 115th Street, New York, NY 10025 USA
AOS/VS C-Kermit system requirements and installation instructions are in the
file CKDKER.INS. Please be sure you have read that file before concluding
that C-Kermit isn't working correctly on AOS/VS.
DOCUMENTATION
C-Kermit 5A is documented in the book "Using C-Kermit" by Frank da Cruz and
Christine M. Gianone, 1993, Digital Press / Butterworth-Heinemann, Woburn, MA,
USA, ISBN 1-55558-108-0. Price: US $34.95. Available in book and computer
stores, or order by phone, call Columbia University at +1 212 854-3703, or
Butterworth-Heinemann at +1 800 366-2665. A German edition is available from
Verlag Heinz Heise in Hannover, Germany.
RESTRICTIONS
Commands:
. Local C-Kermit commands such as WHO, DIR, etc, that are implemented through
CLI calls cannot be interrupted except by entering BREAK (CMD-BRK on DG
terminals) followed by ^C^A.
. The MAIL command has not been implemented.
. The BYE command has not been implemented.
. The WHO command does not accept arguments.
. It is not possible to SUSPEND AOS/VS C-Kermit sessions.
Communications:
. The AOS/VS serial communication device driver requires the RS-232 Carrier
Detect (CD) signal to be on before it can communicate. For dialout
connections, therefore, the modem must be configured to force Carrier Detect
to be on at all times. Direct connections should feed another active
signal, such as DTR, into the VS system's serial port CD circuit.
. AOS/VS Kermit cannot determine the status of modem signals on a line.
. When a locally-established connection to a remote system has been broken,
the local AOS/VS C-Kermit will write "Communications disconnect" to the
screen, but will not finish the rest of the line until there is input from
the keyboard.
. Domain Name Service (DNS) might not work. In that case, you must use
numeric IP addresses in your SET HOST and TELNET commands. Reportedly,
this problem is fixed in AOS/VS II 3.00 / TCP/IP 1.30, but in order to
get the improved functionality in C-Kermit, C-Kermit must be compiled and
linked on a system of this level (the current development system is still
running an older release).
File Transfer:
. The fullscreen file transfer display is not supported.
. If a file is sent to AOS/VS C-Kermit whose name contains VS template
characters (+, *, ^, \, #), C-Kermit fails to open the output file and
the transfer fails. (This was fixed 12 May 93 -- "show versions" should
report "Data General file support, 5A(065) 12 May 93".)
. When AOS/VS C-Kermit is running in server mode, and receives a BYE command,
AOS/VS C-Kermit terminates but its parent process does not. Thus you must
still CONNECT back to the AOS/VS system and log out.
. When AOS/VS C-Kermit is receiving a file, and the file collision action is
set to "update" (meaning that the incoming file should overwrite the
existing file only if its "creation" date is more recent), and the incoming
file is in fact newer, the modification date on the resulting file will
actually be the date/time of the transfer (the real last modification
date/time). This can cause succeeding "update" operations on this file
to fail.
. One user reports that in order for AOS/VS C-Kermit to receive 8-bit binary
files, the CLI command CHAR/ON/8BT must be given before starting C-Kermit.
KNOWN PROBLEMS
Abnormal terminations (stack dumps) may occasionally occur on expiration of
certain timers (when, for instance, the local Kermit gets no response from the
remote Kermit). Apparently this happens only in local mode, i.e. when
C-Kermit was used to initiate a connection to another computer by DIALing.
Cause: Unknown. Cure: Unknown. Possible workarounds: (a) Tell C-Kermit to
SET SEND TIMEOUT 0; (b) Make your connection without using the DIAL command.
(These workarounds are untested.)
(End of CKDKER.BWR)