linux-kernel - Re: [Fwd: escape key]

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Message-ID: <Pine.LNX.4.61.0612171037470.5411@yvahk01.tjqt.qr>
Date:	Sun, 17 Dec 2006 10:40:45 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Stephen Clark <Stephen.Clark@...lark.us>
cc:	Pavel Machek <pavel@....cz>, James Lockie <bjlockie@...kie.ca>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Fwd: escape key]


On Dec 16 2006 19:51, Stephen Clark wrote:
> Jan Engelhardt wrote:
>> 
>> It's something between a misdesign and a misconfiguration of the ESC key.
>> 
>> In other words, many unices make ESC generate ^[, the general
>> terminal escape character that is _also_ generated by keys like "up",
>> ^[[A.
>> 
>
> do man ascii - ESC is 0x1b.
> Thats what the esc key should generate - it sometimes echoed as ^[ because the
> [ = 0x5b

Ok I hoped people would be smart enough to figure, but let me rephrase in two
ways:

  Many unices generate "\x1b" (^[) for ESC, which is also generated by
  keys like "up", which generates "\x1b[A" (^[[A)

>> MS-DOS, or rather QBASIC's, Turbo BASIC's and other implementation of
>> keys, does not have this "bug": here ESC generates "\x1B" and "up"
>> generates "\x00H" IIRC. There is no key defined to generate "\x00".
>> => All fits nicely.

  And QB generates "\x1b" (^[) while "up" generates "\x00H" (^@H).


Hope this makes things more clear - I interchangably used the ^ and the \
notation. Sorry if that confused anyone.

	-`J'
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