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From: "Peter Cassidy" <peter DOT cassidy AT rocksoft DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Hacking long file names from pure DOS
Date: Wed, 8 May 2002 00:45:47 +0930
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Organization: Rocksoft Limited
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hi All,

I have a requirement to see and set long file names from pure DOS booted
from a 'recovery disk' floppy.

I have to demonstrate something to a customer by the weekend, so we're quite
happy to pay money to get fast help on this.

The DOS boot disk comes from "Bart's Boot Disks"
(http://membres.lycos.fr/jfb/gb/TCPIP.htm and http://www.nu2.nu/bootdisk)
(built from W98, DOS 4.10.2222) and the long file name support from LFNDOS
1.06 (http://saturn.spaceports.com/~dosuser/). DPMI is provided by
CWSDMPI.EXE.

I'm testing with a mickey mouse program:
#include <stdio.h>
#include <dirent.h>

main()
{
DIR *d = opendir(".");

struct dirent *de;

printf("Hello all parallel universes.\n");

while (de = readdir(d))
  puts(de->d_name);
closedir(d);
}

which is compiled under gcc from djgpp 203.

I run CWSDPMI -s-

then test LFNDOS with the DOS DIR command.  Before LFNDOS, no long names;
after LFNDOS, long file names appear.  So far so good.

But when I run 'mickey' I get a SEGV after the printf.  i.e. it's opening
the dir but not reading it.  Any ideas anyone?

Sorry I haven't got all the config detail in this post but it's late at
night here in Oz, and I'm going to bed, and meanwhile y'all can tell me
which important information I left out. Also please forgive the newbie
question; I only started using djgpp/lfndos etc. yesterday!

Peter

--

Peter Cassidy (peter DOT cassidy AT rocksoft DOT com), +61 412 283 366.
CTO, Rocksoft Limited.
Ph: +61 8 8232 6262  Fax: +61 8 8232 6264  http://www.rocksoft.com/
Protect your files with Veracity data integrity: http://www.veracity.com/