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      1 #include <stdio.h>
      2 
      3 #include <uv.h>
      4 
      5 uv_loop_t *loop;
      6 uv_fs_t stdin_watcher;
      7 uv_idle_t idler;
      8 char buffer[1024];
      9 
     10 void 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 
     20 void 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 
     34 int 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