Date:	Tue, 11 Feb 1997 09:31:54 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To:	Andy Eskilsson <x-aes AT telelogic DOT se>
cc:	djgpp AT delorie DOT com
Subject:	Re: Detecting longfilename support..
In-Reply-To:	<ksk9ogc00x.fsf@telelogic.se>
Message-ID:	<Pine.SUN.3.91.970211092822.4172H-100000@is>
MIME-Version:	1.0

On 10 Feb 1997, Andy Eskilsson wrote:

> Is it possible, during runtime, to detect if long filenames is
> supported (the LFN=y is set in the djgpp.env file)

Testing for LFN=y in the environment is not enough to know whether LFN is 
supported.  You can set LFN=y on plain DOS and not get long filenames; or 
you could forget to LFN=y on Windows 95 and still get long filenames 
supported.  The macro `_USE_LFN' (defined on <fcntl.h>) returns 1 if you 
can use long filenames, 0 otherwise.  The macro and the function it calls 
are documented in the DJGPP libc docs under `_use_lfn'.

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