Re: GUN Sed Bug

[Eric Blake]

On 10/26/2012 06:42 AM, 王森 wrote:

> address@hidden learn_sed]# /bin/sed "s/\'/ End/" tmp.txt
> hello world End
> I'am in china End
> address@hidden learn_sed]#
> ### My Question
> I want to know the reason.  \' be equal to Line End ?

Thanks for the report.  However, this is not a bug, but a GNU extension,
as documented here:
https://www.gnu.org/software/sed/manual/html_node/Escapes.html#Escapes

In your particular case, end of line and end of input happen to match.
But if your sed script had also used commands like 'N', then you could
see a difference where multi-line mode makes \' match fewer places than $.

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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