path: toybox_0.8.9+dfsg-1.1/tests/pidof.test
chmod a+x pidof-$$.test
cp pidof-$$.test toybox.pidof-$$.test.script
(./pidof-$$.test & echo $! > pid.txt)
pid=$(cat pid.txt)
testcmd "short argv[1]" "pidof-$$.test" "" "" ""