1*61d06d6bSBaptiste Daroussin #include <stddef.h> 2*61d06d6bSBaptiste Daroussin #include <sys/socket.h> 3*61d06d6bSBaptiste Daroussin 4*61d06d6bSBaptiste Daroussin int 5*61d06d6bSBaptiste Daroussin main(void) 6*61d06d6bSBaptiste Daroussin { 7*61d06d6bSBaptiste Daroussin struct msghdr msg; 8*61d06d6bSBaptiste Daroussin 9*61d06d6bSBaptiste Daroussin msg.msg_control = NULL; 10*61d06d6bSBaptiste Daroussin msg.msg_controllen = 0; 11*61d06d6bSBaptiste Daroussin 12*61d06d6bSBaptiste Daroussin return CMSG_FIRSTHDR(&msg) != NULL; 13*61d06d6bSBaptiste Daroussin } 14