Not a typewriter

[Guy Harris]

> 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 at sun.com (or guy at sun.arpa)