1#include <stdio.h>
2
3#include <uv.h>
4
5uv_loop_t *loop;
6uv_fs_t stdin_watcher;
7uv_idle_t idler;
8char buffer[1024];
9
10void crunch_away(uv_idle_t* handle) {
11    // Compute extra-terrestrial life
12    // fold proteins
13    // computer another digit of PI
14    // or similar
15    fprintf(stderr, "Computing PI...\n");
16    // just to avoid overwhelming your terminal emulator
17    uv_idle_stop(handle);
18}
19
20void on_type(uv_fs_t *req) {
21    if (stdin_watcher.result > 0) {
22        buffer[stdin_watcher.result] = '\0';
23        printf("Typed %s\n", buffer);
24
25        uv_buf_t buf = uv_buf_init(buffer, 1024);
26        uv_fs_read(loop, &stdin_watcher, 0, &buf, 1, -1, on_type);
27        uv_idle_start(&idler, crunch_away);
28    }
29    else if (stdin_watcher.result < 0) {
30        fprintf(stderr, "error opening file: %s\n", uv_strerror(req->result));
31    }
32}
33
34int main() {
35    loop = uv_default_loop();
36
37    uv_idle_init(loop, &idler);
38
39    uv_buf_t buf = uv_buf_init(buffer, 1024);
40    uv_fs_read(loop, &stdin_watcher, 0, &buf, 1, -1, on_type);
41    uv_idle_start(&idler, crunch_away);
42    return uv_run(loop, UV_RUN_DEFAULT);
43}
44