1 #include <stdio.h>
2 #include <string.h>
3 #include <unistd.h>
4 #include <uv.h>
5
6 uv_loop_t *loop;
7 uv_tty_t tty;
8 uv_timer_t tick;
9 uv_write_t write_req;
10 int width, height;
11 int pos = 0;
12 char *message = " Hello TTY ";
13
update(uv_timer_t * req)14 void update(uv_timer_t *req) {
15 char data[500];
16
17 uv_buf_t buf;
18 buf.base = data;
19 buf.len = sprintf(data, "\033[2J\033[H\033[%dB\033[%luC\033[42;37m%s",
20 pos,
21 (unsigned long) (width-strlen(message))/2,
22 message);
23 uv_write(&write_req, (uv_stream_t*) &tty, &buf, 1, NULL);
24
25 pos++;
26 if (pos > height) {
27 uv_tty_reset_mode();
28 uv_timer_stop(&tick);
29 }
30 }
31
main()32 int main() {
33 loop = uv_default_loop();
34
35 uv_tty_init(loop, &tty, STDOUT_FILENO, 0);
36 uv_tty_set_mode(&tty, 0);
37
38 if (uv_tty_get_winsize(&tty, &width, &height)) {
39 fprintf(stderr, "Could not get TTY information\n");
40 uv_tty_reset_mode();
41 return 1;
42 }
43
44 fprintf(stderr, "Width %d, height %d\n", width, height);
45 uv_timer_init(loop, &tick);
46 uv_timer_start(&tick, update, 200, 200);
47 return uv_run(loop, UV_RUN_DEFAULT);
48 }
49