GNU bug report logs - #31554
Fwd: Re: Potential bug in md5sum

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "Riedy, Bill" <riedyw <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: Fwd: Re: Potential bug in md5sum
Date: Tue, 22 May 2018 10:52:33 -0400

[Message part 1 (text/plain, inline)]

I believe I've found a bug in md5sum when it attempts to calculate on a 
hard linked file in NTFS on Windows 7.  Please read below for details.



-------- Forwarded Message --------
Subject: 	Re: Potential bug in md5sum
Date: 	Mon, 21 May 2018 19:22:32 +0200
From: 	Mathias Michaelis <mmxael <at> gmail.com>
To: 	billr1965 <at> users.sourceforge.net



Hi Bill

md5sum is a part of the GNU coreutils package, 
http://www.gnu.org/software/coreutils/coreutils.html. It was ported by 
the gnuwin32 Project to Windows: 
http://gnuwin32.sourceforge.net/packages/coreutils.htm. The cause of the 
error you've reported is probably the fact the the gnuwin32 version of 
md5sum is from April 21, 2005.

I'm not the programmer neither of the original version nor of the ported 
one of md5sum and I have not any skills to change something on the 
current state of this tool.

I don't know if it helps but there is also a native windows solution out 
there:

https://support.microsoft.com/en-us/help/841290/availability-and-description-of-the-file-checksum-integrity-verifier-u

With best regards

Mathias


Am 21.05.2018 um 14:50 schrieb billr1965 <at> users.sourceforge.net:
>
> Mathias, I'm not sure if your package contains md5sum, but I've been 
> looking for a way to get in touch with that packages owner. md5sum 
> appears to have an issue with hard links in NTFS on Windows 7. md5sum 
> appears to be creating a value from the hardlink itself, not following 
> the link to the "real" file. An example of this is calc.exe found in 
> c:\windows\system32. I've included a line of powershell to get this 
> information.
>
> get-childitem c:\windows\system32\calc.exe | format-list fullname, target
>
> FullName : C:\windows\system32\calc.exe
> Target : 
> {C:\Windows\winsxs\amd64_microsoft-windows-calc_31bf3856ad364e35_6.1.7600.16385_none_05b2f2e2346cfea4\calc.exe}
>
> md5sum (get-childitem c:\windows\system32\calc.exe | select-object 
> -expand fullname)
> \60b7c0fead45f2066e5b805a91f4f0fc *C:\windows\system32\calc.exe
>
> md5sum (get-childitem c:\windows\system32\calc.exe | select-object 
> -expand target)
> \10e4a1d2132ccb5c6759f038cdb6f3c9 
> *C:\Windows\winsxs\amd64_microsoft-windows-calc_31bf3856ad364e35_6.1.7600.16385_none_05b2f2e2346cfea4\calc.exe
>
> If I copy calc.exe to c:\temp and run the md5sum against that file I 
> get the value that begins with '10e4'
>
> copy-item c:\windows\system32\calc.exe c:\temp -force
>
> md5sum c:\temp\calc.exe
> \10e4a1d2132ccb5c6759f038cdb6f3c9 *c:\temp\calc.exe
>
> If you are not the appropriate person (which is likely) would you 
> happen to know who I can forward this information to? Thanks for any 
> help you can provide.
>
> ------------------------------------------------------------------------
>
> This message was sent to you via the SourceForge web mail form.
> You may reply to this message directly, or at 
> https://sourceforge.net/u/billr1965/profile/send_message
>

[Message part 2 (text/html, inline)]

Message #8 received at 31554 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: "Riedy, Bill" <riedyw <at> gmail.com>, 31554 <at> debbugs.gnu.org
Subject: Re: bug#31554: Fwd: Re: Potential bug in md5sum
Date: Tue, 22 May 2018 18:00:47 -0700

On 05/22/2018 07:52 AM, Riedy, Bill wrote:
> I believe I've found a bug in md5sum when it attempts to calculate on 
> a hard linked file in NTFS on Windows 7.

Could be, but this doesn't look like it's relevant to the current 
codebase for GNU coreutils. 2005 was a looong time ago.

Message #11 received at 31554 <at> debbugs.gnu.org (full text, mbox):

From: Assaf Gordon <assafgordon <at> gmail.com>
To: 31554 <at> debbugs.gnu.org
Subject: Re: bug#31554: Fwd: Re: Potential bug in md5sum
Date: Tue, 30 Oct 2018 03:04:37 -0600

close 31554
stop

(triaging old bugs)

On 2018-05-22 7:00 p.m., Paul Eggert wrote:
> On 05/22/2018 07:52 AM, Riedy, Bill wrote:
>> I believe I've found a bug in md5sum when it attempts to calculate on 
>> a hard linked file in NTFS on Windows 7.
> 
> Could be, but this doesn't look like it's relevant to the current 
> codebase for GNU coreutils. 2005 was a looong time ago.
>
Given the above, I'm closing this bug.
Discussion can continue by replying to this thread.

-assaf

Message #16 received at 31554 <at> debbugs.gnu.org (full text, mbox):

From: "Riedy, Bill" <riedyw <at> gmail.com>
To: 31554 <at> debbugs.gnu.org
Subject: Re: bug#31554 acknowledged by developer (Re: bug#31554: Fwd: Re:
 Potential bug in md5sum)
Date: Sun, 18 Nov 2018 16:37:34 -0500

The wording is vague, could you please clarify which of the following 
are true:

1) That you recognize this as a bug and it is going to be fixed

2) That you recognize this as a bug but it will NOT be fixed

3) Some other scenario that I can't think of, but you may have.

On 10/30/2018 5:05 AM, GNU bug Tracking System wrote:
> This is an automatic notification regarding your bug report
> #31554: Fwd: Re: Potential bug in md5sum,
> which was filed against the coreutils package.
>
> Thank you for your report, which has now been closed.
> You can view the full report at
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31554
>
> If you require further information, please followup to 31554 <at> debbugs.gnu.org.
>
> debbugs.gnu.org maintainers
> (administrator, GNU bugs database)
>

Message #19 received at 31554 <at> debbugs.gnu.org (full text, mbox):

From: Assaf Gordon <assafgordon <at> gmail.com>
To: "Riedy, Bill" <riedyw <at> gmail.com>, 31554 <at> debbugs.gnu.org
Subject: Re: bug#31554: acknowledged by developer (Re: bug#31554: Fwd: Re:
 Potential bug in md5sum)
Date: Sun, 18 Nov 2018 17:44:00 -0700

Hello Bill,

On 2018-11-18 2:37 p.m., Riedy, Bill wrote:
> The wording is vague, could you please clarify which of the following 
> are true:
> 
> 1) That you recognize this as a bug and it is going to be fixed
> 
> 2) That you recognize this as a bug but it will NOT be fixed
> 
> 3) Some other scenario that I can't think of, but you may have.
> 

The original forwarded messaged said the following:

   "md5sum is a part of the GNU coreutils package, [...]
   It was ported by the gnuwin32 Project to Windows: [...]
   The cause of the  error you've reported is probably the fact the
   gnuwin32  version of md5sum is from April 21, 2005."

( https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31554#5 )

Later, Paul replied:

   "Could be, but this doesn't look like it's relevant to the current
   codebase for GNU coreutils. 2005 was a looong time ago."

( https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31554#8 )

After which I've closed the bug report.

The meaning is:
The reported problem is happening
on a very old version of the program (from 2005 - 13 years old),
and using a port (GnuWin32) which GNU coreutils developers
did not create and can't easily provide support.

As such, there is no point in investigating further.
It could be a bug in the (very old) version, or it could
be another problem.

If you can reproduce the bug in a recent version (the current is 8.30).
then there would be more incentive to investigate (though once again,
the GnuWin32 is provided by others, and we can not easily support it).

regards,
 - assaf

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