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Date: Wed, 06 Dec 2000 14:23:29 -0500
To: Bruce Edge <bedge AT sattel DOT com>, cygwin support <cygwin AT sources DOT redhat DOT com>
From: "Larry Hall (RFK Partners, Inc)" <lhall AT rfk DOT com>
Subject: Re: O_NONBLOCK serial I/O blocks on 95, OK on NT
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At 02:08 PM 12/6/2000, Bruce Edge wrote:
>I'm opening /dev/com1 as follows:
>  fd  = open( "/dev/com1", O_RDWR | O_NOCTTY | O_NONBLOCK | O_BINARY ); 
>
>on NT the O_NONBLOCK works fine.
>on win 95, read( fd, buf, max_len ) blocks.
>
>I don't think the termios stuff should affect this, at least if it did, I
>should be having the same problem under NT.
>Is there a fix for this?
>Or, is there any way to check for chars pending before reading?
>I'm already using select(), which shouldn't even drop out of the wait until
>there's data.


Perhaps this is related to this?

http://sources.redhat.com/ml/cygwin/2000-11/msg01544.html

If so, you may find some insight by reading this thread...






Larry Hall                              lhall AT rfk DOT com
RFK Partners, Inc.                      http://www.rfk.com
118 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX



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