rb_io_s_open 6585 io.c return rb_io_s_open(argc, argv, rb_cFile); rb_io_s_open 12243 io.c rb_define_singleton_method(rb_cFile, "open", rb_io_s_open, -1); rb_io_s_open 12248 io.c rb_define_singleton_method(rb_cIO, "open", rb_io_s_open, -1);