Re: BUG: Mingw32: _O_TRUNC

[Benjamin Riefenstahl <benny at crocodial dot de>]

Hi Earnie,


Earnie Boyd wrote:
> The value defined in fcntl.h for _O_TRUNC is 0x0200 which equates to 512
> decimal.  When used in the open routine it gives an error value 22 which
> equates to "Invalid argument" from perror or defined as
> ERROR_BAD_COMMAND in the Windows32/Errors.h header.

Looking at the source for the VC5 RTL this would happen if you have set
neither _O_WRONLY nor _O_RDWR. The source has this also in some
"This-can't-happen" branches.

> I modified the value of _O_TRUNC to 0x0020 which equates to 32 decimal.
> No error is issued from the open routine.

0x0020 is _O_SEQUENTIAL in VC5. I would guess that's just an optimizing
hint.

> I know the the SDK/misc/posix/fcntl.h defines it as 0x00000200 which is
> the same as 0x0200.  So, does the open routine in crtdll have a bug, or
> is the _O_TRUNC value actually wrong?

What does the NT Posix subsystem have to do with anything here?


so long, benny
======================================
Benjamin Riefenstahl (benny@crocodial.de)
Crocodial Communications EntwicklungsGmbH
Ruhrstraße 61, D-22761 Hamburg, Germany
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