linux-kernel - Re: Inconsistency between PTY read() return values

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Message-ID: <20090408175603.GI32098@hoeg.nl>
Date:	Wed, 8 Apr 2009 19:56:03 +0200
From:	Ed Schouten <ed@...eBSD.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Inconsistency between PTY read() return values

Hi Alan,

* Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> I would argue that TTYs do behave this way. We treat the disconnect as a
> hang up event. BSD sees it as EOF, Linux as hangup.

Would you mind explaining me the difference? I thought a modem
disconnect implies an end-of-file condition? If you take the code I
mentioned and modify it to close the master device and perform a read on
the TTY, it will return 0.

-- 
 Ed Schouten <ed@...eBSD.org>

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