Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!mailrus!uflorida!haven!mimsy!chris
From: chris@mimsy.umd.edu (Chris Torek)
Newsgroups: comp.unix.questions
Subject: Re: printf implementation
Message-ID: <22238@mimsy.umd.edu>
Date: 2 Feb 90 01:03:36 GMT
References: <29007@amdcad.AMD.COM>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 15

In article <29007@amdcad.AMD.COM> srini@diablo.amd.com writes:
>I would like to know why printf is implemented separately for shells
>(like in C shell)? I know one reason - efficiency. Are there others?

csh has its own private printf because csh did not quite fit on a
PDP-11 without split I&D, and Bill Joy chipped a bit here and a bit
there to make it fit.  One of the chips was stdio.

>Also, how is printf implemeted (upto the _write level) in library?
>It calls a function _doprnt. What happens from there?

What makes you think it calls _doprnt?  Mine calls vfprintf.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@cs.umd.edu	Path:	uunet!mimsy!chris