From: Adam Langley <alangley@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Edge triggered epoll with pts devices acts as level triggered
Date: Fri, 12 Aug 2005 18:30:55 +0100 [thread overview]
Message-ID: <396556a20508121030de9b49d@mail.gmail.com> (raw)
In-Reply-To: <396556a20508120419238abca6@mail.gmail.com>
On 8/12/05, Adam Langley <alangley@gmail.com> wrote:
> Waiting for edge triggered events (with EPOLLET) on pseudo terminal
> devices appears to act as if it were level triggered; when data is
> ready the fd is always returned by epoll_wait.
This occurs because writing to the terminal happens to cause a read
event to occur for pseudo terminals, but not for real terminals. This
is much less of a problem than the orginal message would suggest.
AGL
--
Adam Langley agl@imperialviolet.org
http://www.imperialviolet.org (+44) (0)7906 332512
PGP: 9113 256A CC0F 71A6 4C84 5087 CDA5 52DF 2CB6 3D60
next prev parent reply other threads:[~2005-08-12 17:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-12 11:19 Edge triggered epoll with pts devices acts as level triggered Adam Langley
2005-08-12 17:30 ` Adam Langley [this message]
2005-08-13 10:30 ` Heikki Orsila
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