From owner-freebsd-bugs  Fri Sep 19 04:45:35 1997
Return-Path: <owner-freebsd-bugs>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id EAA05959
          for bugs-outgoing; Fri, 19 Sep 1997 04:45:35 -0700 (PDT)
Received: from godzilla.zeta.org.au (godzilla.zeta.org.au [203.2.228.19])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id EAA05930;
          Fri, 19 Sep 1997 04:45:21 -0700 (PDT)
Received: (from bde@localhost) by godzilla.zeta.org.au (8.8.5/8.6.9) id VAA14216; Fri, 19 Sep 1997 21:40:27 +1000
Date: Fri, 19 Sep 1997 21:40:27 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199709191140.VAA14216@godzilla.zeta.org.au>
To: bde@zeta.org.au, Don.Lewis@tsc.tdk.com, grog@lemis.com,
        peter@spinner.dialix.com.au
Subject: Re: Bug in malloc/free
Cc: atrens@nortel.ca, freebsd-bugs@FreeBSD.ORG, gram@cdsec.com,
        hackers@FreeBSD.ORG, phk@critter.freebsd.dk
Sender: owner-freebsd-bugs@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

>} We claim to be sort of POSIX conformant.  Perhaps this is enough.  We
>} aren't actually POSIX conformant.  All the above "safe" routines may
>} clobber the global `errno'.
>
>Which is why I save and restore errno in signal handlers.

OpenBSD has some fixes in this area.  However, POSIX seems to say that
it is unnecessary ("[the functions shall be reentrant ... without
restriction]").

Bruce