+
+ pfd[0].events = POLLIN;
+ pfd[0].fd = inotify_init1(IN_CLOEXEC);
+ if (pfd[0].fd < 0) {
+ err(udev, "inotify_init failed: %m\n");
+ } else {
+ if (inotify_add_watch(pfd[0].fd, udev_get_run_path(udev), IN_MOVED_TO) < 0) {
+ err(udev, "watching '%s' failed\n", udev_get_run_path(udev));
+ close(pfd[0].fd);
+ pfd[0].fd = -1;
+ }
+ }
+
+ for (;;) {
+ struct stat statbuf;
+
+ if (exists != NULL && stat(exists, &statbuf) == 0) {
+ rc = EXIT_SUCCESS;
+ break;
+ }
+
+ if (start > 0) {
+ /* if asked for, wait for a specific sequence of events */
+ if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) {
+ rc = EXIT_SUCCESS;
+ break;
+ }
+ } else {
+ /* exit if queue is empty */
+ if (udev_queue_get_queue_is_empty(udev_queue)) {
+ rc = EXIT_SUCCESS;
+ break;
+ }
+ }
+
+ if (pfd[0].fd >= 0) {
+ int delay;
+
+ if (exists != NULL || start > 0)
+ delay = 100;
+ else
+ delay = 1000;
+ /* wake up after delay, or immediately after the queue is rebuilt */
+ if (poll(pfd, 1, delay) > 0 && pfd[0].revents & POLLIN) {
+ char buf[sizeof(struct inotify_event) + PATH_MAX];
+
+ read(pfd[0].fd, buf, sizeof(buf));
+ }
+ } else {
+ sleep(1);
+ }
+
+ if (timeout > 0) {
+ unsigned long long age_usec;
+
+ age_usec = now_usec() - start_usec;
+ if (age_usec / (1000 * 1000) >= timeout) {
+ struct udev_list_entry *list_entry;
+
+ if (!quiet && udev_queue_get_queued_list_entry(udev_queue) != NULL) {
+ info(udev, "timeout waiting for udev queue\n");
+ printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout);
+ udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
+ printf(" %s (%s)\n",
+ udev_list_entry_get_name(list_entry),
+ udev_list_entry_get_value(list_entry));
+ }
+
+ break;
+ }
+ }
+ }
+out:
+ if (pfd[0].fd >= 0)
+ close(pfd[0].fd);