+static int internal_check(adns_state ads,
+ adns_query *query_io,
+ adns_answer *answer,
+ void *context_r) {
+ abort(); /* FIXME */
+}
+
+int adns_wait(adns_state ads,
+ adns_query *query_io,
+ adns_answer *answer,
+ void *context_r) {
+ int r, maxfd, rsel, rcb;
+ fd_set readfds, writefds, exceptfds;
+ struct timeval tvbuf, *tvp;
+
+ for (;;) {
+ r= internal_check(ads,query_io,answer,context_r);
+ if (r && r != EWOULDBLOCK) return r;
+ FD_ZERO(&readfds); FD_ZERO(&writefds); FD_ZERO(&exceptfds);
+ maxfd= 0; tvp= 0;
+ adns_interest(ads,&maxfd,&readfds,&writefds,&exceptfds,&tvp,&tvbuf);
+ rsel= select(maxfd,&readfds,&writefds,&exceptfds,tvp);
+ if (rsel==-1) return r;
+ rcb= adns_callback(ads,maxfd,&readfds,&writefds,&exceptfds);
+ assert(rcb==rsel);
+ }
+}
+
+int adns_check(adns_state ads,
+ adns_query *query_io,
+ adns_answer *answer,
+ void *context_r) {
+ autosys(ads);
+ return internal_check(ads,query_io,answer,context_r);
+}
+
+int adns_synchronous(adns_state ads,
+ const char *owner,
+ adns_rrtype type,
+ adns_queryflags flags,
+ adns_answer *answer) {
+ adns_query qu;
+ int r;
+
+ r= adns_submit(ads,owner,type,flags,0,&qu);
+ if (r) return r;
+
+ do {
+ r= adns_wait(ads,&qu,answer,0);
+ } while (r==EINTR);
+ if (r) adns_cancel(ads,qu);
+ return r;
+}
+