From owner-freebsd-bugs  Mon May 25 00:33:09 1998
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From: Poul-Henning Kamp <phk@FreeBSD.ORG>
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Date: Mon, 25 May 1998 00:27:23 -0700 (PDT)
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To: ru@ucb.crimea.ua, phk@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG
Subject: Re: bin/6741
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Synopsis: libc: printf() causes errno is set to 2

State-Changed-From-To: open-closed
State-Changed-By: phk
State-Changed-When: Mon May 25 00:25:53 PDT 1998
State-Changed-Why: 
The 2 returned is likely from mallocs check for /etc/malloc.conf,
this will probably only happen on the first call.

Anyway, unless the manpage talks about errno, expect it to be junk.

junk can also be zero, and it may depend in a lot of factors

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