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From: guy@sun.uucp (Guy Harris)
Newsgroups: net.unix,net.unix-wizards
Subject: Re: Not a typewriter
Message-ID: <4224@sun.uucp>
Date: Wed, 18-Jun-86 13:26:01 EDT
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Posted: Wed Jun 18 13:26:01 1986
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> That is because the runtime library wants to know if the file is associated
> with a terminal (so that it can be unbuffered output in BSD or line
> buffered in SV.2).

Not quite.  Line buffering was introduced either in 4.1BSD or even earlier.
The USDL picked up the Berkeley implementation and dropped it into S5 in
S5R2.
-- 
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com (or guy@sun.arpa)