GNU bug report logs - #17552
Sometimes md5sum misses files

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

From: "Hamilton, Eric" <Eric.Hamilton <at> schneider-electric.com>
To: <bug-coreutils <at> gnu.org>
Subject: Sometimes md5sum misses files
Date: Thu, 22 May 2014 10:18:09 -0700

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

Hi

 

I just noticed that md5sum sometimes does not calculate a md5 checksum
on a file when using wild cards.

 

I am running Cygwin64 under Windows7 64-bit and am executing the program
within a Ms-Dos window.

 

My call is "md5sum *.h64"

 

md5sum "missed" doing a checksum on the lang.h64 file.

 

If I run md5sum directly on lang.h64, then I get a checksum.

 

The two included files are: md5.txt is the version data for md5sum.

In  md5test.zip are the six test files and the result of running md5sum.

 

The version data is all  in Linux end of line format.

In the test files some files have Linux end of lines and some have
Ms-Dos end of lines. 

 

I tried to make shorter test files and then the problem did not happen.

 

I can't think of anything else to try. My workaround is to just manually
do a md5sum on the lang.h64 file. 

 

Others may have the same problem and have not yet caught it yet.

________________________________________________________________________
_______
All men are created equal .... and then some become Marine Sargents
Eric Hamilton  |   Pelco by Schneider Electric   |  Buildings Business
|   United States  |   Senior Software Engineer 
Phone: 559-292-1981 ext. 3375  |   Toll Free: 800-289-9100 ext. 3375  |
Direct Phone:  559-388-3375
Email: Eric.Hamilton <at> schneider-electric.com <mailto:ehamilton <at> pelco.com>
|   Site: www.schneider-electric.com
<http://www.schneider-electric.com/>   |   Address: 3500 Pelco Way,
Clovis, California, 93612-5699 USA 

 

 

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

[md5.txt (text/plain, attachment)]

[md5test.zip (application/x-zip-compressed, attachment)]

Message #8 received at 17552 <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: "Hamilton, Eric" <Eric.Hamilton <at> schneider-electric.com>
Cc: 17552 <at> debbugs.gnu.org
Subject: Re: bug#17552: Sometimes md5sum misses files
Date: Thu, 22 May 2014 18:35:35 +0100

tag 17552 notabug
close 17552
stop

On 05/22/2014 06:18 PM, Hamilton, Eric wrote:
> Hi
> 
>  
> 
> I just noticed that md5sum sometimes does not calculate a md5 checksum
> on a file when using wild cards.
> 
>  
> 
> I am running Cygwin64 under Windows7 64-bit and am executing the program
> within a Ms-Dos window.
> 
>  
> 
> My call is "md5sum *.h64"
> 
> md5sum "missed" doing a checksum on the lang.h64 file.
> 
>  
> 
> If I run md5sum directly on lang.h64, then I get a checksum.

I see in the zip file that the file name is actually lang.H64
I.E. a capital 'H'. So I'm guessing that the glob done
by the shell is case insensitive, while the file system
is only case retentive and so maps the lang.h64 request to lang.H64?

In bash for example you can run the following to
glob case insensitively:

  shopt -s nocaseglob

I've no experience on such platforms so the above is just a guess,
and we can open the bug again if there is an issue.

thanks,
Pádraig.

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