select            251 include/ruby/intern.h #define rb_fd_select(n, rfds, wfds, efds, timeout)	select(n, rfds, wfds, efds, timeout)
select           2239 thread.c           return select(n, r, w, e, timeout);
select           2370 thread.c       		    result = select(n, read, write, except, wait);
select           2394 thread.c       	result = select(n, read, write, except, timeout);
select           2163 win32/win32.c  	    r = select(nfds, rd, wr, ex, timeout);