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Article #234

Re: bug in tty driver?

#234
From: Mikel Manitius
Date: Thu, 03 Oct 1985 23:32
42 lines
2162 bytes
> Description:
> 
> The following combination of events seems to cause reads of a tty to return
> EOF (VAX System V, Rel 2.0, Version 2; but may apply to your system as well):
> 
> 1) type a character, then backspace
> 2) have your terminal set into raw mode, then back to canonical mode
> 
> This problem arises (for example), if I type vnews<CR>, then n^H, and vnews
> decides I have no news.
> 
> Prove it:
> 
> Place the following text in a file called "foo".
> 	sleep 10
> 	: remember previous settings
> 	x=`stty -g`
> 	stty raw
> 	stty $x
> 
> Now type:
> sh foo<CR>
> x^H<no CR>
> After 10 seconds, your shell will exit.  This applies to both the tty driver
> and the sxt driver.
> 					Ron Williams
> 					utzoo!hcrvax!hcrvx1!ronald

I have tried this on my 3B2 5.2 2.0, it does not throw generate an EOF
for me, however it does create other problems: After running foo, when I
type a character, it is not echoed, the next time I type it, I get a bell,
and the procedure repeats itself, when I try to type different characters,
I get just bells, only when I generate some activity on the keyboard
(ie: typing many characters per second) do they begin to echo. This is
quite interresting.
-- 
                                        =======
     Mikel Manitius                   ==----=====    AT&T
     ...!{ihnp4!}codas!mikel         ==------=====   Information Systems 
     (305) 869-2462                  ===----======   SDSS Regional Support
     AT&T-IS ETN: 755                 ===========    Altamonte Springs, FL
     My opinions are my own.            =======
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Message-ID: <130@codas.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!bonnie!akgua!akguc!codas!mikel
References: <1251@hcrvx1.UUCP>

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site codas.UUCP
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!bonnie!akgua!akguc!codas!mikel
From: mikel@codas.UUCP (Mikel Manitius)
Newsgroups: net.bugs.usg
Subject: Re: bug in tty driver?
Message-ID: <130@codas.UUCP>
Date: Thu, 3-Oct-85 19:32:33 EDT
Article-I.D.: codas.130
Posted: Thu Oct  3 19:32:33 1985
Date-Received: Mon, 7-Oct-85 03:49:19 EDT
References: <1251@hcrvx1.UUCP>
Organization: AT&T Information Systems (SDSS) - Orlando
Lines: 42