X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 	tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS
X-Spam-Check-By: sourceware.org
To: cygwin AT cygwin DOT com
From: Eric Blake <ebb9 AT byu DOT net>
Subject:  Re: Tried out cygwin-inst-20100111.tar.bz2
Date: Wed, 13 Jan 2010 16:18:38 +0000 (UTC)
Lines: 22
Message-ID:  <loom.20100113T171641-557@post.gmane.org>
References:  <COL102-W462D97538DD6B7BAA121D5B56C0 AT phx DOT gbl>  <20100112164834 DOT GV14511 AT calimero DOT vinschen DOT de>  <COL102-W52DB3A5D272B9E630D808EB56C0 AT phx DOT gbl>  <20100113110729 DOT GX14511 AT calimero DOT vinschen DOT de>  <4B4DCB0C DOT 9040402 AT byu DOT net> <20100113140642 DOT GZ14511 AT calimero DOT vinschen DOT de> <loom DOT 20100113T165802-718 AT post DOT gmane DOT org>
Mime-Version:  1.0
Content-Type:  text/plain; charset=us-ascii
Content-Transfer-Encoding:  7bit
User-Agent: Loom/3.14 (http://gmane.org/)
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

Eric Blake <ebb9 <at> byu.net> writes:

> In other words, tcsetattr should always be used on a struct termios obtained 
> from a read-modify-write manner, and never from a memset(0) manner, where the 
> use of O_TTY_INIT guarantees (trivially, if it is defined to 0) that any 
> extension fields in struct termios that need to be set to a non-zero value 
for 
> POSIX conformance are set correctly.

By the way, cygwin's extension fields are:

c_line
c_ispeed
c_ospeed

and any bits in the various tcflag_t fields that are set by default but which 
represent flags not specified in POSIX (off-hand, I didn't see any, but I 
didn't spend too much time looking).

-- 
Eric Blake



--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple