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From: "Rod Pemberton" <do_not_have AT nohavenot DOT cmm>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Is there some way to convert long filenames to short filenames?
Date: Fri, 13 Mar 2009 20:35:06 -0400
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To: djgpp AT delorie DOT com
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"dos-man 64" <ChairShot AT mail DOT com> wrote in message
news:c8b9dd7a-ced3-4522-9bdd-bc565c607369 AT l39g2000yqn DOT googlegroups DOT com...
> The only requirement is I have to set an
> environment variable LFN=y.

As DJ said, this should be automatic...  However, I've also have a few
programs where I have code force LFN use, if available.  This is with DJGPP
v2.03.

#ifdef __DJGPP__
/* if LFN driver installed, force _USE_LFN on */
if(lfn_installed)
{
  _crt0_startup_flags&=~_CRT0_FLAG_NO_LFN;
  putenv("LFN=y");
}
#endif

The variable lfn_installed gets set to one if a __dpmi_int 0x21 call to
0x71a0 reports that it supports long filename functions.


Rod Pemberton