Re: grep bug ?

[Alain Magloire]

> 
> well, I'm ot sure if this is a bug ...
> but it's something that's bugging me, and I'm sure it bugs other
> shell scripters.
> grep {foo,bar} file
> that works fine, it greps all lines containing foo and bar

Yes, suprisingly
# /bin/echo '{foo,bar}' | grep '{foo,bar}'
{foo,bar}
#

Will work.  But I have doubt if it is what you have in mind
in term of regular expression.

> but when doing:
> grep -v {foo,bar} file
> it doesnt work at all ...

What does not work?
I have no idea what you are trying to achieve.

> Any other syntax for that operation, is it bug or just not possible
> with grep ?

Read grep documentation.  GNU grep comes with an info file
that explains regexes and also contains examples.

> (if the later .... please do impliment it)
>

Once you understand the behaviour of grep, send patches
they are always welcome to improve GNU grep.

> Thanks.
> 
> Billy Wideling.
> 

--
alain