stream_open_for_read
if (stream_open_for_read(S, cur_streamp) > 1)
stream_open_for_read(S, cur_streamp);
if (stream_open_for_read(S, cur_stream) == -1)
(stream_open_for_read(S, cur_stream) == -1))
stream_open_for_read(S, bot_streamp) == -1) {
(void) stream_open_for_read(S, cur_streamp);
(void) stream_open_for_read(S, cur_streamp);
(void) stream_open_for_read(S, cur_streamp->s_next);
extern int stream_open_for_read(sort_t *, stream_t *);