- ppp_send_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
- ppp_recv_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
+ if (ppp_send_config(0, PPP_MRU, (u_int32_t) 0, 0, 0) < 0
+ || ppp_recv_config(0, PPP_MRU, (u_int32_t) 0, 0, 0) < 0)
+ fatal("Couldn't set up demand-dialled PPP interface: %m");