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From: jdege@ (Jeff Dege)
Newsgroups: comp.lang.rexx
Subject: Re: Single character input
Message-ID: <1991Jan3.001412.9677@cs.umn.edu>
Date: 3 Jan 91 00:14:12 GMT
References: <1990Dec30.035944.1472@ddsw1.MCS.COM>
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Reply-To: jdege@donald.cs.umn.edu (Jeff Dege)
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In article <1990Dec30.035944.1472@ddsw1.MCS.COM> veck@ddsw1.MCS.COM (Steven P. King) writes:
>Rexx question for the peanut gallery.  ARexx, actually.  Is there a way to
>get single character input from the keyboard?  PULL wants a carriage return.
>I'm trying to write a program in which it's pretty vital to have single
>keystroke commands.
>
     This isn't an Arexx question, it's an AmigaDOS question.  Every console
handler performs some degree of massaging of input.  The standard console
in cooked mode allows for command line editting, etc.  Nothing gets sent to
the application until it sees a newline.  The answer, of course, is to either
open a new console in raw mode or to set the current console to raw mode.
The first is easy.  Just call open with a 'raw:0/0/100/100/' filename.
The second is more difficult.You need to send an ACTION_SCREEN_MODE packet
to the console handler.  I have code to do this in C, I have no idea how to
do it in REXX.  (There is a package in the PD for AREXX called ALIBHOST that
allows you to access any system function, so it can obviously be done, but
I've never done it.)
 
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