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bug#27803: dd by default prints output to stderr instead of stdout
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From: |
Eric Blake |
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Subject: |
bug#27803: dd by default prints output to stderr instead of stdout |
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Date: |
Mon, 24 Jul 2017 10:13:20 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
tag 27803 notabug
thanks
On 07/24/2017 09:34 AM, vasanth kumar wrote:
> Hi,
>
> When I run a dd command successfully, it actually prints I/O statistics to
> standard error and not stdout . Is not it suppposed to print it on stdout
> by default for a good run?
No, POSIX requires that it print stats to stderr.
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/dd.html
"STDERR
On completion, dd shall write the number of input and output blocks
to standard error...."
Therefore, the behavior is intentional, and I'm closing this as not a
bug. However, feel free to reply to this thread if you have further
questions on the topic.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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