linux-kernel - Re: serial port programming second question (newbie)

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Message-ID: <20110118105737.3ff91a39@lxorguk.ukuu.org.uk>
Date:	Tue, 18 Jan 2011 10:57:37 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	donna.rigas@...onavionics.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: serial port programming second question (newbie)

On Mon, 17 Jan 2011 16:41:38 -0800
Donna Rigas <donna.rigas@...il.com> wrote:

> Also, if your call to tcsetattr fails, or if  the ioctl call to
> set the baud rate fails, does it matter if you restore the serial
> port settings or not?

If they fail the returned struct contains the settings you ended up with,
eg the baud rate you actually got. Older kernels didn't get that detail
right but current ones do. Generally they will try and pick a nearest
suitable rate.

Alan
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