[debbugs-tracker] bug#12794: closed (Bug in dd: it sends wrong messages to stderr)

[GNU bug Tracking System]

Your message dated Sat, 03 Nov 2012 12:08:45 -0700
with message-id <address@hidden>
and subject line Re: bug#12794: Bug in dd: it sends wrong messages to stderr
has caused the debbugs.gnu.org bug report #12794,
regarding Bug in dd: it sends wrong messages to stderr
to be marked as done.

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12794: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=12794
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> --- Begin Message ---
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> Subject: 
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> Bug in dd: it sends wrong messages to stderr
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> Date: 
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> Sat, 3 Nov 2012 16:28:49 +0100
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> User-agent: 
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> KMail/1.13.6 (Linux/2.6.38-15-generic; KDE/4.6.5; x86_64; ; )
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> Dear sirs:
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> I send you a bug report.
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> # DESCRIPTION
>
> Bug in dd: it sends wrong messages to stderr.
>
> For example, when I do backups, I see "errors" from dd... that really aren't. 
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> # WAY TO REPRODUCE THE BUG
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> A user can execute:
>    partition=$(mount | awk '$2=="on" && $3=="/" {print $1}')
>    sudo dd if="$partition" of=/tmp/copseg.dd count=1 bs=512 >/dev/null
> and then he sees something like this in his screen:
>   1+0 records in
>   1+0 records out
>   512 bytes (512 B) copied, 0,000129625 s, 3,9 MB/s
>
> # EXPECTED RESULTS:
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> The user should see nothing, as there was no error and stdout was redirected 
> to /dev/null.
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> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Re: bug#12794: Bug in dd: it sends wrong messages to stderr
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> Date: 
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> Sat, 03 Nov 2012 12:08:45 -0700
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> User-agent: 
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> Mozilla/5.0 (X11; Linux i686;	rv:16.0) Gecko/20121028 Thunderbird/16.0.2
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> On 11/03/2012 08:28 AM, Ganton wrote:
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> > when I do backups, I see "errors" from dd... that really aren't. 
>
> You have a point, but I'm afraid that dd is documented to behave
> that way, and it's part of the POSIX standard, and lots of people
> depend on it.  To turn off the chatter, use "dd status=noxfer".
>
>
> --- End Message ---