rb_fd_max         219 include/ruby/intern.h #define rb_fd_max(f)	((f)->maxfd)
rb_fd_max         237 include/ruby/intern.h #define rb_fd_max(f)	((f)->fdset->fd_count)
rb_fd_max         250 include/ruby/intern.h #define rb_fd_max(f)	FD_SETSIZE