- if (FD_ISSET(0,&readfds)) {
- r= read(0,rp,min(buffersize-1-used,buf+buffersize-rp));
- if (!r) {
- seeneof=1; writing=1;
- } else if (r<0) {
- if (!(errno == EAGAIN || errno == EINTR)) { perror("read"); exit(1); }
- } else {
- used+= r;
- rp+= r;
- if (rp == buf+buffersize) rp=buf;
- }
- if (used > waitfill) writing=1;
+ if (rdfd>=0 && FD_ISSET(rdfd,&readfds)) {
+ r= read(rdfd,rp,min(buffersize-1-used,buf+buffersize-rp));
+ if (!r) {
+ seeneof=1; writing=1;
+ } else if (r<0) {
+ if (!(errno == EAGAIN || errno == EINTR)) { perror("read"); exit(1); }
+ } else {
+ used+= r;
+ rp+= r;
+ if (rp == buf+buffersize) rp=buf;