Subject: Re: bug#22071: incorrect behaviour for inverted matches with -l on empty files

From: Mark Wotton <[email-masked]>
Date: Wed, 2 Dec 2015 08:57:49 -0500

Yes, I understand the interpretation now. Just confusing when you have
a model in mind that almost always works.

On 12/2/15, Eric Blake <[email-masked]> wrote:
> On 12/02/2015 06:14 AM, Mark Wotton wrote:
>> hm. "grep -l '' empty" also doesn't print anything, so I guess it's
>> consistent, at least.
>
> You want 'grep -L "hi there" ./empty', which says to print the names of
> all files that did not contain any match (and not the names of all files
> that had lines that didn't match).  That is, -v and -L are different
> types of negation.
>
> $ grep -L '' empty
> empty
> $ grep -Lv '' empty
> empty
>
> The empty file has no matches to any patterns (whether or not the
> pattern is negated with -v), so it shows up under -L.
>
> --
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>

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