File: signal5.tests

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trap "echo USR1 received" USR1
stub() {
    echo "Sleeping"
    sleep $1
    echo "$1 sec passed, sending USR1 to parent"
    kill -USR1 $$
}
stub 3 &
stub 2 &
sleep 1
until { echo "Waiting"; wait; } do
    echo "Wait exit code: $?"
done
echo "Wait returned 0"