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bug#18585: Bad count in WC command?
From: |
Eric Blake |
Subject: |
bug#18585: Bad count in WC command? |
Date: |
Mon, 29 Sep 2014 14:47:02 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 |
tag 18585 notabug
thanks
On 09/29/2014 07:25 AM, Schapovalov, Sebastian wrote:
> Hello, I was testing one parameter in my .sh and realised that the wc command
> return a different value that I was expected. I send you a couple examples.
>
> I have to validate a celular telephone number (in Argentina), so, it has to
> be a 10 chars parameter.
>
> sarasa() -- seba > echo 1029384756 | wc -c
> 11
Classic user mistake. 'echo' outputs a trailing newline, which IS a
character,
> sarasa () -- seba > echo 1029384756 | wc -L
> 10
but does NOT contribute to the length of the longest line. Try
comparing these two commands
echo 1029384756 | oc -tx1z
printf 1029384756 | oc -tx1z
to see what I mean.
I'm closing this as not a bug, but feel free to ask further questions.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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