From: Mervyn Baldwin 
Subject: Re: Redirection
James,
>> It doesn't work! When you redirect with '<' there IS no tail at 081.
>> QUESTION: Does anybody know how to check for correct input in 
>> circumstances like this?
>I believe that if you call 21/0B, you will find AL returns FFh if
>input has been redirected, and returns 0h if it hasn't...
My! What esoteric stuff I got into there.  Not one of the books I 
have which have descriptions of that DOS function suggest such a 
possiblility, BUT - reading between the lines, it looks very likely.
I'll certainly try it. Many thanks.
-- 
vyn@abaldwin.demon.co.uk
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