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Date:	Tue, 10 May 2005 11:32:08 -0400
From:	Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Bug in the /dev/ttySx handling code?
Message-ID:	<20050510153208.GY15665@trixie.casa.cgf.cx>
Reply-To:	cygwin AT cygwin DOT com
References:	<20050509203526 DOT GA28389 AT ahab DOT auto DOT tuwien DOT ac DOT at> <20050510111656 DOT GA31844 AT ahab DOT auto DOT tuwien DOT ac DOT at>
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On Tue, May 10, 2005 at 01:16:56PM +0200, Martin Koegler wrote:
>On Mon, May 09, 2005 at 10:35:26PM +0200, Martin Koegler wrote:
>>At least, I understand, why stty -F /dev/ttyS0 under cygwin return 0
>>baud: tcgetattr returns 0 baud, if DTR is not set, which is different
>>to the behaviour of Linux.
>>
>>I would like to track the problem down, but as the use of stty (and cat
>>for doing IO) does not work, I have no idea, how to do it.
>
>After some testing, I found the problem: Cygwin stores the baud rate in
>c_ospeed of the termios struct, whereas Linux stores them in c_cflag.
>Therefore all code storing the baud rate in c_cflag is not working on
>cygwin.  Posix suggest using cfsetispeed() and cfsetospeed() to set the
>baud rate in the termios structure, as the location for the baud rate
>is not specified.

Hmm, linux does have c_ispeed and c_ospeed elements in the termios
structure.

cgf

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