From: earnie_boyd AT hotmail DOT com (Earnie Boyd)
Subject: Re: BUG: Mingw32: _O_TRUNC
7 Apr 1998 09:01:17 -0700
Message-ID: <19980331132948.284.qmail.cygnus.gnu-win32@hotmail.com>
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To: gnu-win32 AT cygnus DOT com

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Hi Mikey,

>From: jeffdbREMOVETHIS AT goodnet DOT com (Mikey)
>To: "Earnie Boyd" <earnie_boyd AT hotmail DOT com>
>Subject: Re: BUG: Mingw32: _O_TRUNC
>Date: Tue, 31 Mar 1998 03:10:16 GMT
>Reply-To: jeffdbREMOVETHIS AT goodnet DOT com
>
>See attached.

I guess I need to be a MSDN member to do that.

>
>_O_TRUNC Opens file and truncates it to zero length; file must have 
write permission. 
>You cannot specify this flag with _O_RDONLY. _O_TRUNC used with 
_O_CREAT 
>opens an existing file or creates a new file.
>
>Did you do your test under bash or command.com?

Results were the same under both.  I'm on NT 3.51, I forget what build.  
The bits to the open mode are O_BINARY, O_WRONLY, O_CREAT, O_EXCL, and 
O_TRUNC.  As I understand it, all of these should be able to be used 
together.

I using JanJaap's 2.8.1 Mingw32 version to build.

>
>O_TRUNC open using msvcrt.dll causes write error 
>under bash (the file is set read only).

I would expect that to be the case.

>
>0x200 is correct per MS, and does truncate the file.

I'm glad to here it.

>
>Try testing under command.com
>

I did.  Could you test the attached source using msvcrt and then crtdll?



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