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Date: Sun, 9 Jan 2000 17:17:43 -0500 (EST)
From: Jamie Guinan <guinan AT bluebutton DOT com>
X-Sender: guinan AT gemini DOT home DOT net
Reply-To: guinan AT bluebutton DOT com
To: Mumit Khan <khan AT NanoTech DOT Wisc DOT EDU>
cc: Cygwin Mailing List <cygwin AT sourceware DOT cygnus DOT com>
Subject: Re: Segfault when call kernel32 function
In-Reply-To: <Pine.HPP.3.96.1000106193708.1532B-100000@hp2.xraylith.wisc.edu>
Message-ID: <Pine.LNX.4.10.10001091704300.6013-100000@gemini.home.net>
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I tried it both 1 and 2 and still got the same error.  If you have a
minute, maybe you could try a little test program with BuildCommDCB() 
and see if it breaks or if its just me.  I'd appreciate knowing one 
way or the other.

Thanks,
-Jamie

On Thu, 6 Jan 2000, Mumit Khan wrote:

> I believe the bug is in Windows itself. Even though the prototype
> says that you can supply the first parameter as LPCSTR (ie., 
> `const char *'), Windows kernel will try to play with the string
> it in place (possibly reformatting it, or something of that sort).
> 
> Solution:
> 
> 1. Use -fwritable-strings option when compiling. Bad.
> 
> 2. Use a static or allocated buffer and pass that instead.
>    
>    static char mode_str[] = "9600,...";
>    BuildCommDCB (mode_str, &dcb);
> 
> Regards,
> Mumit


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