From owner-freebsd-hackers Wed Oct 22 15:20:49 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id PAA04184 for hackers-outgoing; Wed, 22 Oct 1997 15:20:49 -0700 (PDT) (envelope-from owner-freebsd-hackers) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id PAA04177 for ; Wed, 22 Oct 1997 15:20:44 -0700 (PDT) (envelope-from j@uriah.heep.sax.de) Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id AAA02134 for freebsd-hackers@FreeBSD.ORG; Thu, 23 Oct 1997 00:20:32 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.8.7/8.8.5) id AAA02035; Thu, 23 Oct 1997 00:17:17 +0200 (MET DST) Message-ID: <19971023001717.AU43421@uriah.heep.sax.de> Date: Thu, 23 Oct 1997 00:17:17 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-hackers@FreeBSD.ORG (FreeBSD hackers) Subject: Re: Possible SERIOUS bug in open()? References: <19971022190225.DV50844@uriah.heep.sax.de> X-Mailer: Mutt 0.60_p2-3,5,8-9 Mime-Version: 1.0 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: ; from David E. Cross on Oct 22, 1997 14:22:11 -0400 Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk As David E. Cross wrote: > I thought that O_RDRW = O_RDONLY | O_WRONLY. You better look at the actual values of these macros. ;-) Inside the kernel, it's indeed this way (FREAD and FWRITE). However in open(), O_RDONLY is 0, O_WRONLY is 1. Thus, your idea would just yield O_WRONLY. The worse case was an attempt to use O_WRONLY|O_RDWR. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)