man/inotify-watch-tmp.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <sys/inotify.h>
   4
   5 #include <systemd/sd-event.h>
   6
   7 #define _cleanup_(f) __attribute__((cleanup(f)))
   8
   9 static int inotify_handler(sd_event_source *source,
  10                            const struct inotify_event *event,
  11                            void *userdata) {
  12
  13   const char *desc = NULL;
  14
  15   sd_event_source_get_description(source, &desc);
  16
  17   if (event->mask & IN_Q_OVERFLOW)
  18     printf("inotify-handler <%s>: overflow\n", desc);
  19   else if (event->mask & IN_CREATE)
  20     printf("inotify-handler <%s>: create on %s\n", desc, event->name);
  21   else if (event->mask & IN_DELETE)
  22     printf("inotify-handler <%s>: delete on %s\n", desc, event->name);
  23   else if (event->mask & IN_MOVED_TO)
  24     printf("inotify-handler <%s>: moved-to on %s\n", desc, event->name);
  25
  26   /* Terminate the program if an "exit" file appears */
  27   if ((event->mask & (IN_CREATE|IN_MOVED_TO)) &&
  28       strcmp(event->name, "exit") == 0)
  29     sd_event_exit(sd_event_source_get_event(source), 0);
  30
  31   return 1;
  32 }
  33
  34 int main(int argc, char **argv) {
  35   _cleanup_(sd_event_unrefp) sd_event *event = NULL;
  36   _cleanup_(sd_event_source_unrefp) sd_event_source *source1 = NULL, *source2 = NULL;
  37
  38   const char *path1 = argc > 1 ? argv[1] : "/tmp";
  39   const char *path2 = argc > 2 ? argv[2] : NULL;
  40
  41   /* Note: failure handling is omitted for brevity */
  42
  43   sd_event_default(&event);
  44
  45   sd_event_add_inotify(event, &source1, path1,
  46                        IN_CREATE | IN_DELETE | IN_MODIFY | IN_MOVED_TO,
  47                        inotify_handler, NULL);
  48   if (path2)
  49     sd_event_add_inotify(event, &source2, path2,
  50                          IN_CREATE | IN_DELETE | IN_MODIFY | IN_MOVED_TO,
  51                          inotify_handler, NULL);
  52
  53   sd_event_loop(event);
  54
  55   return 0;
  56 }