From mboxrd@z Thu Jan  1 00:00:00 1970
From: dave@horsfall.org (Dave Horsfall)
Date: Fri, 10 Nov 2017 07:53:02 +1100 (EST)
Subject: [TUHS] pre-more pager?
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On Wed, 8 Nov 2017, Will Senn wrote:

>>     < filename head -20
>> 
> too bad head doesn't exist on v7. I did have to look up the incantation 
> in Intro to the Shell by Bourne, that's fascinating stuff and it still 
> works on my mac - nuts!

If you're interviewing a new hire, see how long it takes 'em to work out 
what this does:

     :; </etc/motd> /dev/tty sed 1q ;: echo "Hello, world"

Tested on all shells at my disposal; might even work on V7.  Did I mention 
that I use Perl, and used to use APL\360?  The only reason I don't write 
obfuscated code is that I might be the one who has to maintain it later...

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."