func readAndCompare(conn *net.UnixConn, want string) error {
buf := make([]byte, 128)
// File system events can take a long time to propagate
conn.SetDeadline(time.Now().Add(3 * time.Second))
if _, _, err := conn.ReadFrom(buf); err != nil {
return err
}
if have := string(bytes.Trim(buf, "\x00")); have != want {
return fmt.Errorf("expected %q, got %q", want, have)
}
return nil
}