[Toybox] grep corner cases

[Strake]

On 20/08/2013, Rob Landley <rob at landley.net> wrote:
> On 08/20/2013 12:29:08 PM, Felix Janda wrote:
>> But maybe it's a reason to spend some thought on the validity of the
>> test case and maybe do some testing against other implementations. For
>> example busybox grep also doesn't output anything.
>
> What other implementations? -o is a gnu/dammit extension.

OpenBSD, for one [1].

[1] http://www.openbsd.org/cgi-bin/man.cgi?query=grep