GNU bug report logs - #44308
md5sum (and other *sum utils) path dependent output

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

From: Alessandro Forghieri <alf <at> orion.it>
To: bug-coreutils <at> gnu.org
Subject: md5sum (and other *sum utils) path dependent output
Date: Thu, 29 Oct 2020 11:41:03 +0100

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

Greetings.

Just stumbled upon this:

*# md5sum
./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3
\d41d8cd98f00b204e9800998ecf8427e 
./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3*

*# cp
./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3
/tmp/qlo
# md5sum /tmp/qlo
d41d8cd98f00b204e9800998ecf8427e  /tmp/qlo**
*

IE, in the first instance a '\' character is prepended to the output.
The file itself is an empty file, so I guess the file content is
irrelevant to the apparent bug.

Running coreutils-8.31-6.fc30.x86_64 on Linux 5.6.13-100.fc30.x86_64+debug

To communicate, cc me, as I am not a ML subscriber.

Cheers,


-- 
Alessandro Forghieri
Nouvelle s.r.l.
via Giardini 456/C 41124 Modena  (ITALY)
tel. +39 059 2929338 - Fax +39 059 347606

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

From: Alessandro Forghieri <alf <at> orion.it>
To: bug-coreutils <at> gnu.org
Subject: Re: md5sum (and other *sum utils) path dependent output
Date: Thu, 29 Oct 2020 11:43:28 +0100

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

I forgot to add, sha1sum, sha256sum and I'm guessing (but did not test)
all the other *sum utils behave similarly.


On 10/29/20 11:41 AM, Alessandro Forghieri wrote:
>
> Greetings.
>
> Just stumbled upon this:
>
> *# md5sum
> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3
> \d41d8cd98f00b204e9800998ecf8427e 
> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3*
>
> *# cp
> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3
> /tmp/qlo
> # md5sum /tmp/qlo
> d41d8cd98f00b204e9800998ecf8427e  /tmp/qlo**
> *
>
> IE, in the first instance a '\' character is prepended to the output.
> The file itself is an empty file, so I guess the file content is
> irrelevant to the apparent bug.
>
> Running coreutils-8.31-6.fc30.x86_64 on Linux 5.6.13-100.fc30.x86_64+debug
>
> To communicate, cc me, as I am not a ML subscriber.
>
> Cheers,
>
>
> -- 
> Alessandro Forghieri
> Nouvelle s.r.l.
> via Giardini 456/C 41124 Modena  (ITALY)
> tel. +39 059 2929338 - Fax +39 059 347606

-- 
Alessandro Forghieri
Nouvelle s.r.l.
via Giardini 456/C 41124 Modena  (ITALY)
tel. +39 059 2929338 - Fax +39 059 347606

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

From: Kamil Dudka <kdudka <at> redhat.com>
To: alf <at> orion.it
Cc: bug-coreutils <at> gnu.org, 44308 <at> debbugs.gnu.org
Subject: Re: bug#44308: md5sum (and other *sum utils) path dependent output
Date: Thu, 29 Oct 2020 16:22:29 +0100

On Thursday, October 29, 2020 11:41:03 AM CET Alessandro Forghieri wrote:
> Greetings.
> 
> Just stumbled upon this:
> 
> *# md5sum
> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_
> Duevi\\Roberto_Zanisi.mp3 \d41d8cd98f00b204e9800998ecf8427e
> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_
> Duevi\\Roberto_Zanisi.mp3*
> 
> *# cp
> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_
> Duevi\\Roberto_Zanisi.mp3 /tmp/qlo
> # md5sum /tmp/qlo
> d41d8cd98f00b204e9800998ecf8427e  /tmp/qlo**
> *
> 
> IE, in the first instance a '\' character is prepended to the output.
> The file itself is an empty file, so I guess the file content is
> irrelevant to the apparent bug.
> 
> Running coreutils-8.31-6.fc30.x86_64 on Linux 5.6.13-100.fc30.x86_64+debug

This is the documented behavior of md5sum [1]:

    "Without ‘--zero’, if FILE contains a backslash or newline, the line is
    started with a backslash, and each problematic character in the file name
    is escaped with a backslash, making the output unambiguous even in the
    presence of arbitrary file names."

Kamil

[1] https://www.gnu.org/software/coreutils/manual/html_node/md5sum-invocation.html

> To communicate, cc me, as I am not a ML subscriber.
> 
> Cheers,

Message #17 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Alessandro Forghieri <alf <at> orion.it>
To: Kamil Dudka <kdudka <at> redhat.com>
Cc: bug-coreutils <at> gnu.org, 44308 <at> debbugs.gnu.org
Subject: Re: bug#44308: md5sum (and other *sum utils) path dependent output
Date: Thu, 29 Oct 2020 18:00:18 +0100

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

Ok, missed that bit. My bad.

Cheers,


On 10/29/20 4:22 PM, Kamil Dudka wrote:
> On Thursday, October 29, 2020 11:41:03 AM CET Alessandro Forghieri wrote:
>> Greetings.
>>
>> Just stumbled upon this:
>>
>> *# md5sum
>> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_
>> Duevi\\Roberto_Zanisi.mp3 \d41d8cd98f00b204e9800998ecf8427e
>> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_
>> Duevi\\Roberto_Zanisi.mp3*
>>
>> *# cp
>> ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_
>> Duevi\\Roberto_Zanisi.mp3 /tmp/qlo
>> # md5sum /tmp/qlo
>> d41d8cd98f00b204e9800998ecf8427e  /tmp/qlo**
>> *
>>
>> IE, in the first instance a '\' character is prepended to the output.
>> The file itself is an empty file, so I guess the file content is
>> irrelevant to the apparent bug.
>>
>> Running coreutils-8.31-6.fc30.x86_64 on Linux 5.6.13-100.fc30.x86_64+debug
> This is the documented behavior of md5sum [1]:
>
>     "Without ‘--zero’, if FILE contains a backslash or newline, the line is
>     started with a backslash, and each problematic character in the file name
>     is escaped with a backslash, making the output unambiguous even in the
>     presence of arbitrary file names."
>
> Kamil
>
> [1] https://www.gnu.org/software/coreutils/manual/html_node/md5sum-invocation.html
>
>> To communicate, cc me, as I am not a ML subscriber.
>>
>> Cheers,
>
>
-- 
Alessandro Forghieri
Nouvelle s.r.l.
via Giardini 456/C 41124 Modena  (ITALY)
tel. +39 059 2929338 - Fax +39 059 347606

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