Re: sed bug report

[Paolo Bonzini]

Il 13/06/2012 05:04, Josh McFarlane ha scritto:
> I believe I have found a potential bug in sed extended regular
> expressions. Using the following command:
> $sed -n -r '/^\s*[^\s]+\s*$/p' test.txt

[^\s] is not supported by sed.  You need to use \S.

Paolo

> 
> Where test.txt conatins:
> a
>        b
> a b
> 
> Produces the following output:
>  a
>        b
> a b
> 
> In my opinion this is an unexpected behavior as this regular
> expression should only print lines where there is zero or more
> whitespace characters, followed by one or more non whitespace
> characters, followed by zero or more whitespace characters, followed
> by the end of the line.