From owner-freebsd-current@FreeBSD.ORG  Sat May 14 07:25:15 2005
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Date: Sat, 14 May 2005 15:25:13 +0800 (CST)
From: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw>
To: Daniel Eriksson <daniel_k_eriksson@telia.com>
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cc: freebsd-current@FreeBSD.org
Subject: Re: PAM breakage
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On Sat, 14 May 2005, Daniel Eriksson wrote:
>
> Somewhere between 2005.05.12.19.00.00 and 2005.05.13.18.10.00 PAM (or
> something PAM relies on) got messed up. Installing a system with the later
> date will prevent you from logging in, both via ssh and on the console.
> Using ssh results in the following console output:
>
> sshd[530]: fatal: openpty returns device for which ttyname fails.
> sshd[530]: error: chown  0 0 failed: No such file or directory
> sshd[530]: error: chmod  0666 failed: No such file or directory

   Does backing out ttyname related changes work for you?

 	http://lists.freebsd.org/pipermail/cvs-src/2005-May/046254.html