check_cache
static struct address_cache *check_cache(const char *, const char *);
ad_cache = check_cache(host, nconf->nc_netid);
int check_cache(char *, char *, int *, int *);
if (check_cache(uname, pw, &r.uid, &r.gid)) {
if (check_cache(uname, pw, &r.uid, &r.gid)) {