vi doubleescape feature

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Article #1275

#1275

From: QQ11
Date: Thu, 29 Nov 1990 19:26

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This is available with vi under HP-UX 7.0 (and HP-UX 6.5 and before (??)).
When set, 2 consecutive ESCs are required to exit from input mode.
It's very useful when supporting the arrow keys and allows full/proper
cursor movement in input mode.
However a quick check on other systems indicates that this feature is not
widespread. It's not available under SunOS 4.1 , SCO Un*x 3.2
and I assume 4.3 BSD and SVr3. The "User's Guide" for SVr4 makes no
mention (but then it makes no mention of a number of things :-)).

Do any other vi versions have this feature and/or is there a 'catch' ?

Thanks.

Alan Thew  : University of Liverpool Computer Laboratory
Bitnet/Earn: QQ11@LIVERPOOL.AC.UK or QQ11%UK.AC.LIVERPOOL @ UKACRL
    UUCP   :           ....!mcsun!ukc!liv!qq11
   Voice   :  +44 51 794 3735        FAX : +44 51 794 3759
Internet   : QQ11@LIVERPOOL.AC.UK or QQ11%LIVERPOOL.AC.UK @ NSFNET-RELAY.AC.UK

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!apple!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!mcsun!ukc!mucs!liv-cs!liv!qq11
From: QQ11@LIVERPOOL.AC.UK
Newsgroups: comp.editors,comp.sys.hp
Subject: vi doubleescape feature
Message-ID: <90333.192627QQ11@LIVERPOOL.AC.UK>
Date: 29 Nov 90 19:26:27 GMT
Organization: University of Liverpool
Lines: 18