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bug#27803: dd by default prints output to stderr instead of stdout
From: |
vasanth kumar |
Subject: |
bug#27803: dd by default prints output to stderr instead of stdout |
Date: |
Mon, 24 Jul 2017 20:49:29 +0530 |
Thanks Eric .I got the answer.
On Mon, Jul 24, 2017 at 8:43 PM, Eric Blake <address@hidden> wrote:
> 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
>
>