demand_conf
if (protp->enabled_flag && protp->demand_conf != NULL)
if (!((*protp->demand_conf)(0)))
if (protp->enabled_flag && protp->demand_conf != NULL &&
if (protp->enabled_flag && protp->demand_conf != NULL &&
if (protp->enabled_flag && protp->demand_conf != NULL &&
demand_conf();
int (*demand_conf) __P((int unit));
extern void demand_conf __P((void));