From: Ed Schouten <ed@FreeBSD.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Inconsistency between PTY read() return values
Date: Wed, 8 Apr 2009 20:22:55 +0200 [thread overview]
Message-ID: <20090408182255.GJ32098@hoeg.nl> (raw)
In-Reply-To: <20090408190916.0c213aba@lxorguk.ukuu.org.uk>
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* Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> A modem disconnect is a hang up which is quite different to an EOF and is
> effectively a security barrier as well (existing users of the tty port
> lose access to it aka revoke())
Ah, I see. I thought of a hangup as being a physical loss of carrier,
not the method of revoking processes from a TTY. So how come a hangup
can be seen by the pseudo-terminal master? Isn't that something that
should only cause file descriptors to the TTY to become invalid?
--
Ed Schouten <ed@FreeBSD.org>
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prev parent reply other threads:[~2009-04-08 18:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 14:36 Inconsistency between PTY read() return values Ed Schouten
2009-04-08 16:47 ` Alan Cox
2009-04-08 17:56 ` Ed Schouten
2009-04-08 18:09 ` Alan Cox
2009-04-08 18:22 ` Ed Schouten [this message]
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