linux-kernel - Re: dup2() vs dup3() inconsistency when

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 09 Oct 2008 13:31:39 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	mtk.manpages@...il.com, Al Viro <viro@...iv.linux.org.uk>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: dup2() vs dup3() inconsistency when

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

H. Peter Anvin wrote:
> The dup2() behavior comes from the logical consequence of dup2()'s
> "close on reuse"; one would think it would be logical for dup3() to
> behave the same way.

No.  We deliberately decided on this change.  Otherwise, what is the
result of dup3(fd, fd, O_CLOEXEC)?  There is no reason to use
dup2(fd,fd), so why the hell somebody wants to defend this is beyond me.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)

iEYEARECAAYFAkjuaisACgkQ2ijCOnn/RHRBBgCeMtzyHtpv7jt5a2XxIq9LEoDN
ZVYAnixMwtW6d6SL55MvrKwV/B5Yv1Cm
=MCqO
-----END PGP SIGNATURE-----
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/