1 #include <stdio.h>
2 #include <stdlib.h>
3
4 #include <uv.h>
5
6 uv_loop_t *loop;
7 const char *command;
8
run_command(uv_fs_event_t * handle,const char * filename,int events,int status)9 void run_command(uv_fs_event_t *handle, const char *filename, int events, int status) {
10 char path[1024];
11 size_t size = 1023;
12 // Does not handle error if path is longer than 1023.
13 uv_fs_event_getpath(handle, path, &size);
14 path[size] = '\0';
15
16 fprintf(stderr, "Change detected in %s: ", path);
17 if (events & UV_RENAME)
18 fprintf(stderr, "renamed");
19 if (events & UV_CHANGE)
20 fprintf(stderr, "changed");
21
22 fprintf(stderr, " %s\n", filename ? filename : "");
23 system(command);
24 }
25
main(int argc,char ** argv)26 int main(int argc, char **argv) {
27 if (argc <= 2) {
28 fprintf(stderr, "Usage: %s <command> <file1> [file2 ...]\n", argv[0]);
29 return 1;
30 }
31
32 loop = uv_default_loop();
33 command = argv[1];
34
35 while (argc-- > 2) {
36 fprintf(stderr, "Adding watch on %s\n", argv[argc]);
37 uv_fs_event_t *fs_event_req = malloc(sizeof(uv_fs_event_t));
38 uv_fs_event_init(loop, fs_event_req);
39 // The recursive flag watches subdirectories too.
40 uv_fs_event_start(fs_event_req, run_command, argv[argc], UV_FS_EVENT_RECURSIVE);
41 }
42
43 return uv_run(loop, UV_RUN_DEFAULT);
44 }
45
