1#!/bin/sh23# Must not find us alive4{ sleep2; kill -9 $$; } 2>/dev/null &
56sleep1 &
7PID=$!
89# We must exit the loop in one second.10# We had bug 5304: builtins never waited for exited children11whilekill -0$PID >/dev/null2>&1; do12true13done14echoOk15