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

#!/bin/sh
a() { cat /proc/$1/cmdline; p=$(echo -n $(ps -p $1 -oppid | tail -1)); if egrep " \| cat\$" /proc/$p/cmdline; then ps -p $1 -ocmd | tail -1; else a $p; fi }
a $$