#!/bin/bash
while mapfile -d '' -t -n 5 filenames; do
	out=()
	for item in "${filenames[@]}"; do
		if [[ $item = *token1* || $item = *token2* ]]; then
			out+=("$item")
		fi
	done
	printf '%s\0' "${out[@]}" | xargs -0 other-binary
done
# If I were actually doing this,
# I'd have used `grep -Zv -e token1 -e token2` to do the filtering,
# but since the point was for it to be an example filter,
# I'm going to assume that in "real" use, grep couldn't handle it.

#!/bin/ruby
STDIN.readlines("\0").map{|item|item.chomp("\0")}
	.each_slice(5) do |ary|
	out = ary.select{|item|
		item.include?("token1") || item.include?("token2")
	}
	IO::popen(["other-binary"], "w") do |io|
		out.each{|item|io.write(item+"\0")}
	end
end