+ exit(2);
+
+ if (start > 0) {
+ unsigned long long kernel_seq;
+
+ kernel_seq = udev_queue_get_kernel_seqnum(udev_queue);
+
+ /* unless specified, the last event is the current kernel seqnum */
+ if (end == 0)
+ end = udev_queue_get_kernel_seqnum(udev_queue);
+
+ if (start > end) {
+ err(udev, "seq-start larger than seq-end, ignoring\n");
+ start = 0;
+ end = 0;
+ }
+
+ if (start > kernel_seq || end > kernel_seq) {
+ err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n");
+ start = 0;
+ end = 0;
+ }
+ info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq);
+ } else {
+ if (end > 0) {
+ err(udev, "seq-end needs seq-start parameter, ignoring\n");
+ end = 0;
+ }
+ }
+
+ /* guarantee that the udev daemon isn't pre-processing */
+ if (getuid() == 0) {
+ struct udev_ctrl *uctrl;
+
+ uctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
+ if (uctrl != NULL) {
+ sigset_t oldmask;
+
+ sigemptyset(&mask);
+ sigaddset(&mask, SIGUSR1);
+ sigaddset(&mask, SIGALRM);
+ sigprocmask(SIG_BLOCK, &mask, &oldmask);
+ if (udev_ctrl_send_settle(uctrl) > 0)
+ sigsuspend(&oldmask);
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+ udev_ctrl_unref(uctrl);
+ }
+ }
+
+ for (;;) {
+ struct stat statbuf;
+ const struct timespec duration = { 0 , 1000 * 1000 * 1000 / LOOP_PER_SECOND };
+
+ if (exists != NULL && stat(exists, &statbuf) == 0) {
+ rc = 0;