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From: Randy Bush <randy@psg.com>
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Cc: FreeBSD Current <freebsd-current@freebsd.org>
Subject: Re: grep
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>> FreeBSD ran.psg.com 10.0-CURRENT FreeBSD 10.0-CURRENT #4: Sat Dec 24 12:33:51 UTC 2011     root@ran.psg.com:/usr/obj/usr/src/sys/RAN  amd64
>>
>> % echo foo | grep foo
>> %
>
> What about 'grep -V'? Or 'which grep'?

turns out that a zero length grep had been installed

updated to new sources, rebuilt, and it's all good.

randy