priv_open
if ((_this->devf = priv_open(buf, O_RDWR | O_NONBLOCK)) < 0) {
if ((f = priv_open(path, O_RDONLY)) < 0)
int priv_open (const char *, int);
if ((_this->bpf = priv_open("/dev/bpf", O_RDWR)) == -1) {