pfctl_open
h = pfctl_open(PF_DEVICE);
h = pfctl_open(PF_DEVICE);
h = pfctl_open(PF_DEVICE);
struct pfctl_handle *pfctl_open(const char *pf_device);
pfh = pfctl_open(pf_device);
if ((pfh = pfctl_open(PF_DEVICE)) == NULL) {