<Jafet> (echo \'#!/bin/sh\'; echo \'a() { p=$(echo -n $(ps -p $1 -oppid | tail -1)); if ps -p $p -ocmd | tail -1 | egrep " \\| cat\\$"; then ps -p $1 -ocmd | tail -1; else a $p; fi }\'; echo \'a $$\') > bin/quine2 && quine2 a b c

"Hello, world!"S