rb_fd_copy        339 include/ruby/intern.h #define rb_fd_copy(d, s, n)	rb_w32_fd_copy((d), (s), (n))
rb_fd_copy        356 include/ruby/intern.h #define rb_fd_copy(d, s, n) (*(d) = *(s))
rb_fd_copy       3509 thread.c       rb_fd_copy(rb_fdset_t *dst, const fd_set *src, int max)