GNU bug report logs - #10043
md5sum improvment suggestion

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

From: Castet JR <castet01 <at> yahoo.fr>
To: bug-coreutils <at> gnu.org
Subject: md5sum improvment suggestion
Date: Mon, 14 Nov 2011 08:56:15 +0000 (GMT)

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md5sum improvment suggestion

Let assume this:

  find /lib -type f -name '*dll' |head -n5 >a0.a

  cat a0.a

/lib/aspell-0.60/context-filter.dll
/lib/aspell-0.60/email-filter.dll
/lib/aspell-0.60/nroff-filter.dll
/lib/aspell-0.60/sgml-filter.dll
/lib/aspell-0.60/tex-filter.dll


md5sum checks file integrity based on the md5 crc, of an single file.
  md5sum /lib/aspell-0.60/tex-filter.dll
  0



md5sum checks file integrity based on the md5 crc, of an list of files .
  md5sum -c a0.md5
  0



md5sum apparently does not make an a0.md5 signature file from a list of files:
  find /lib -type f -name '*dll' |head -n5 |while read f; do md5sum $f; done >>a0.md

  -nasty-  :-(

therefore, should it be a good idea to improve md5sum with this option:
  md5sum -f a0.md5 

to achive
  find /lib -type f -name '*dll' |head -n5 |while read f; do md5sum $f; done >>a0.md

spontaneously ? :-)


Thx

' nice day

pc

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Message #10 received at 10043-done <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: Castet JR <castet01 <at> yahoo.fr>
Cc: 10043-done <at> debbugs.gnu.org
Subject: Re: bug#10043: md5sum improvment suggestion
Date: Mon, 14 Nov 2011 10:27:02 +0000

tags 10043 notabug

On 11/14/2011 08:56 AM, Castet JR wrote:
> md5sum improvment suggestion
> 
> Let assume this:
> 
>   find /lib -type f -name '*dll' |head -n5 >a0.a
> 
>   cat a0.a
> 
> /lib/aspell-0.60/context-filter.dll
> /lib/aspell-0.60/email-filter.dll
> /lib/aspell-0.60/nroff-filter.dll
> /lib/aspell-0.60/sgml-filter.dll
> /lib/aspell-0.60/tex-filter.dll
> 
> 
> md5sum checks file integrity based on the md5 crc, of an single file.
>   md5sum /lib/aspell-0.60/tex-filter.dll
>   0

That's not what happens with coreutils md5sum.
Can you give the output of md5sum --version.
I'm closing the bug for the moment.

> md5sum checks file integrity based on the md5 crc, of an list of files .
>   md5sum -c a0.md5
>   0
> 
> 
> 
> md5sum apparently does not make an a0.md5 signature file from a list of files:
>   find /lib -type f -name '*dll' |head -n5 |while read f; do md5sum $f; done >>a0.md
> 
>   -nasty-  :-(

BTW the above would start an md5sum process for each file,
as well as using shell loops which are slow.
The preferred idiom for this is:

find /lib -type f -name '*dll' | xargs md5sum >a0.md5

cheers,
Pádraig.

Message #13 received at 10043 <at> debbugs.gnu.org (full text, mbox):

From: Castet JR <castet01 <at> yahoo.fr>
To: 10043 <at> debbugs.gnu.org
Subject: Re : bug#10043: ... md5sum ... : many thansk for a so quick answer !
	:-)
Date: Mon, 14 Nov 2011 10:36:22 +0000 (GMT)

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Re : bug#10043: ... md5sum ... : 

  many thansk for a so quick answer ! :-)


Have a nice day

pc

--- En date de : Lun 14.11.11, GNU bug Tracking System <help-debbugs <at> gnu.org> a écrit :

De: GNU bug Tracking System <help-debbugs <at> gnu.org>
Objet: bug#10043: closed (Re: bug#10043: md5sum improvment suggestion)
À: "Castet JR" <castet01 <at> yahoo.fr>
Date: Lundi 14 novembre 2011, 11h28

Your bug report

#10043: md5sum improvment suggestion

which was filed against the coreutils package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 10043 <at> debbugs.gnu.org.

-- 
10043: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10043
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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