IFCLOSIZ
strncpy(ifc->ifc_name, name, IFCLOSIZ-1);
if (strnlen(name, IFCLOSIZ) >= (IFCLOSIZ - 1))
char ifc_name[IFCLOSIZ]; /* (c) Name of device, e.g. `gif' */
char ifc_name[IFCLOSIZ] = { [0] = '\0' };
strncpy(ifc_name, ifc->ifc_name, IFCLOSIZ-1);