Hi,Eric
Many thanks for your quite detailed explanation.
It's not bug but my limit knowledge.
It works and I have learned the details from you.
Thanks!
Best Regards
Xiaowu Dai
STmicroelectronics
(+)86 –(0)755-8601-2139
Tina: 097-2139
-----Original Message-----
From: Eric Blake [mailto:[email protected]]
Sent: Friday, November 01, 2013 10:26 PM
To: Xiao Wu DAI; [email protected]
Subject: Re: xargs bugs
On 11/01/2013 01:54 AM, Xiao Wu DAI wrote:
>
> hi,
>
> it seems `echo ..` doesn't work in GNU xargs version 4.2.27 like below
> | xargs -t -i mv {}`echo {} |sed 's/mode/dai/g'`
'echo' is your friend. Try:
echo xargs -t -i mv {} `echo {} | sed 's/mode/dai/g'`
to see that you were executing:
xargs -t -i mv {} {}
which is NOT what you wanted. You need to use proper quoting; and since you
want to do programmatic shell actions on {}, you need your xargs to spawn an
instance of sh. Try:
xargs -t -i sh -c 'mv "$1" "$(echo "$1" | sed 's/mode/dai/g')"' sh {}
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
