pipe_open_s      4843 io.c           	port = pipe_open_s(pname, modestr, fmode, &convconfig);
pipe_open_s      5174 io.c           	return pipe_open_s(cmd, rb_io_oflags_modestr(oflags), fmode, &convconfig);
pipe_open_s      6479 io.c               port = pipe_open_s(str, "r", FMODE_READABLE, NULL);