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From: "Åke Rehnman" <ake.rehnman@gmail.com>
To: cygwin@cygwin.com
Subject: Setting termios VMIN > 0 and VTIME > 0 on non blocking file
Date: Wed, 11 Mar 2020 21:48:05 +0100	[thread overview]
Message-ID: <9e4c6428-59de-df07-9e33-44ba95d5497f@gmail.com> (raw)

Hello all,

opening a file (serial port) with O_NONBLOCK and subsequently setting 
termios VMIN and VTIME > 0 makes read() never ever return any data 
(returns EAGAIN indefinitely).

Don't ask my why one would want to do something like this but apparently 
the "screen" program think this is a good way of doing things...

Nevertheless not returning any data ever seems wrong.

Any insight on how it is supposed to work is welcome.


             reply	other threads:[~2020-03-11 20:48 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.1473.1583981776.15804.cygwin@cygwin.com>
2020-03-11 20:48 ` Åke Rehnman [this message]
2020-03-11 21:55   ` Brian Inglis
2020-03-12  1:01     ` Norton Allen
2020-03-12  1:04     ` Åke Rehnman
2020-03-12  1:08       ` Norton Allen
2020-03-12  1:39         ` Åke Rehnman
2020-03-12  8:05   ` Thomas Dickey
2020-03-12 11:01     ` Åke Rehnman
2020-03-12 19:48     ` Achim Gratz
2020-03-12 11:40   ` Corinna Vinschen
2020-03-12 13:32     ` Åke Rehnman
2020-03-12 14:13       ` Corinna Vinschen
2020-03-12 16:42         ` Åke Rehnman
2020-03-13 10:02           ` Corinna Vinschen
2020-03-12 14:20     ` Åke Rehnman
2020-03-12 14:44       ` Corinna Vinschen
2020-03-12 15:08         ` Corinna Vinschen
2020-03-12 17:04           ` Åke Rehnman
2020-03-13 10:12             ` Corinna Vinschen
2020-03-14 10:23               ` Åke Rehnman
2020-03-14 10:36                 ` Åke Rehnman
2020-03-16  9:35                   ` Corinna Vinschen
2020-03-17 12:16                     ` Corinna Vinschen
2020-03-17 15:54                       ` Åke Rehnman

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