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From: Jason Curl <j DOT m DOT curl AT optusnet DOT com DOT au>
Subject: Re: select() read() and write() on /dev/console
Date: Sun, 21 Nov 2004 14:34:01 +0100
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References: <Pine DOT LNX DOT 4 DOT 44 DOT 0411191834400 DOT 1687-100000 AT centurai DOT sps DOT mot DOT com> <20041119183842 DOT GB26102 AT trixie DOT casa DOT cgf DOT cx>
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Christopher Faylor wrote:
> On Fri, Nov 19, 2004 at 06:46:56PM +0100, Jason Curl wrote:
> 
>>My question, how do I go about investigating what the root cause is? Has 
>>anybody else seen similar issues and been able to work around it? I'm 
>>stuck and I've never seen the source code to cygwin before.
> 
> 
> If you suspect a problem with the cygwin DLL then you can build a
> debugging version of the cygwin DLL and debug it using gdb.
> 
> Most of the console handling is in fhandler_console.cc.  The select
> handling is in select.cc.  Look for the string "console" there.
> 
> Instructions for building the DLL are in the FAQ:
> 
> http://cygwin.com/faq/faq_3.html#SEC101
> 

Created a test to try and localise the problem a little more. Just using 
the console on it's own doesn't appear to create the problem (I write to 
the console, read from the console).

The application I've written that shows this problem is involving a 
serial port (in/out), a disk file for logging (out) and the console 
(in/out). I'll keep replying to this post as I find out more information.

Thanks,
Jason.


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