ndbootd_memdup
void *ndbootd_memdup _NDBOOTD_P((void *, size_t));
#define ndbootd_dup(t, b, c) ((t *) ndbootd_memdup(b, c))
interface->ndbootd_interface_ifreq = (struct ifreq *) ndbootd_memdup(&ifr, SIZEOF_IFREQ(&ifr));