If you look where we started ( http://news.ycombinator.com/item?id=4076559 http://news.ycombinator.com/item?id=4076559 ), I'm not trying to feed the regex patte

If you look where we started ( http://news.ycombinator.com/item?id=4076559 http://news.ycombinator.com/item?id=4076559 ), I'm not trying to feed the regex pattern to grep via stdin, but I'm trying to feed the input stream to be searched for the pattern to grep via stdin.