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Date: Sun, 06 May 2018 21:53:30 +0200
From: "Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via djgpp-workers AT delorie DOT com]" <djgpp-workers AT delorie DOT com>
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To: djgpp-workers AT delorie DOT com
Subject: Re: DJGPP on NTF with SFN creating disabled [was : gcc-8.1.0 packages
 for testing]
References: <0244cff9-6176-8aec-bbc2-6fc49602c295 AT iki DOT fi> <558b5ff2-71df-e556-a874-7acbb264c84a AT iki DOT fi> <5AED9B44 DOT 90000 AT gmx DOT de> <df616b96-646c-788b-3177-87de740f03ae AT iki DOT fi>
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Reply-To: djgpp-workers AT delorie DOT com

Am 05.05.2018 16:04, schrieb Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com]:
> On 05/05/2018 02:53 PM, Juan Manuel Guerrero (juan DOT guerrero AT gmx DOT de) [via djgpp-workers AT delorie DOT com] wrote:
>> Am 04.05.2018 20:28, schrieb Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com]:
>>> On 05/03/2018 06:20 AM, Andris Pavenis (andris DOT pavenis AT iki DOT fi) [via djgpp-workers AT delorie DOT com] wrote:
>>>> gcc-8.1.0 packages (both DJGPP native compiler and cross-compiler RPMs) are available for testing at
>>>>
>>>>
>>>> http://ap1.pp.fi/djgpp/gcc/8.1.0/
>>>>
>>>> http://ap1.pp.fi/djgpp/gcc/gcc-version-index.html
>> [snip]
>>> Possible additional change, which I would like to see in: support of NTFS when SFN creating is disabled by Windows registry setting. Currently attempting open file which has only LFN but not SFN fails with EACCES. I myself do not have all required environments for testing such changes
>>
>> If it is really required I can check the behaviour on MSDOS-6.22, Win98SE, Win2KSP5
>> and WinXPSP3,  But I need some test code that is supposed to fail.
>>
>>
> It is easy to test with any simple test program that tries to open file with LFN preasent and SFN missing.
>
> 1) disable SFN creating according to Microsoft instructions and reboot. It will not affect any already existing file for which SFN is already present
> (https://support.microsoft.com/en-us/help/121007/how-to-disable-8-3-file-name-creation-on-ntfs-partitions)
> 2) create some file lite test.file.1 (you can even do it with DJGPP tools as creating file works)
> 3) reenable SFN creating in registry and reboot to prevent problems with files created later
>
> After that You have a test file with missing SFN (one can try 'LFN=N ls -l' to verify that SFN is missing.
> 'cat test.file.1' is after that expected to fail. For debugging plain opening file for reading is sufficient for testing.
>
> Andris

OK, I was able to reproduce this for Win2K and WinXP when they read/write on NTFS formated partitions.
Have you already designed any fix for this issue?  Is there any fix conceivable for this issue when
only long filenames have been created?  IIRC on FAT file systems the short file name is created first
and then the long file name is assigned to it.  A long file name without a short filename does not exist,
or am I missing something?

Regards,
Juan M. Guerrero