Hey. I always thought, that grep is line based in a way that the current string doesn't hold the line terminator. If so, why does, e.g.: $ printf 'foo' | grep $'\n' foo match?
Even with -z. While: $ printf 'foo\nbar' | grep -z $'\n' foo bar would make sense to me, why does it also match: $ printf 'foobar' | grep -z $'\n' foobar ? In PCRE mode: $ printf 'foobar' | grep -P -z '\n' $ No match, that I would expect. $ printf 'foo\nbar' | grep -P -z '\n' foo bar Match, again, expected. But: $ printf 'foobar' | grep -P -z $'\n' foobar Why does that match? Thanks, Philippe
