From:	"Grigoriy Strokin" <grg AT philol DOT msu DOT ru>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Fw: Long file names under Windows NT
Date:	Thu, 25 Dec 1997 20:24:13 +0300
Lines:	69
NNTP-Posting-Host:	isabase.philol.msu.ru
Message-ID:	<34a296c3.0@boy.nmd.msu.ru>
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

>On Thu, 25 Dec 1997, Grigoriy Strokin wrote:
>
>> Please tell me how to make all DJGPP GNU utilities see long file names
under
>> Windows NT 4.0.
>> I seem to have looked through all FAQs and DOCs, but thay only mention
that
>> long file names are supported under Windows 95.
>
>The FAQ clearly says (in section 3.3) that the long file names are NOT
>supported on NT.  Here's an excerpt from that section:
>
>  Note that the long filename API (the special LFN-aware functions of Int
21h)
>  for DOS box is not supported by current versions of Win/NT, so you cannot
>  have long filenames there from DJGPP programs.
>
>Somebody is working on a solution for this, so this situation may change
>in the near future.  Until then, blame Microsoft.
>
>> I have investigated how _use_lfn.c module determines whether to use LFN
>> support. It DOS (int 21h) function  number
>> 71h to get volume information, and disables LFN if 7100h is returned in
AX,
>> and NT returns exactly that value. Why?
>
>Because NT doesn't support those functions of Int 21h.
>
>> What does this mean? That NT is worse in supporting LFN?
>
>The DJGPP LFN support is based on certain functions of DOS Int 21h.  The
>NT DOS box doesn't support these functions, it's as simple as that.
>Native NT programs can see long names because they don't use the Int 21h
>interface, but DOS programs such as what DJGPP produces don't have access
>to long names on NT.

Thank you for your answer. I might have missed the sense of that phrase from
FAQ,
because many other DOCs said that all one have to do is not to set $LFN to
'n' and
all programs support long file names.

Please advise me the better direction in which I must investigate the
problem if
I still want to make DJGPP to support LFN in NT myself:

1)
Can I find any TSR-program emulating long file name support for DOS programs
under NT?

2)
Is there any documentation on how to implement those int 21h functions
myself? I am not a very experienced low-level programmer, but I could try to
implement them.

3)
May be you would recommend trying to recompile all of the programs with
RSX/NT toolkit or Visual C++ and so get 32-bit windows code, or such a task
will be to complicated because of several incompatibilities?

4)
Some other solutions?

Apologies for my ignorance,
and thank you in advance.

Grigoriy Strokin.

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