- write(idle_pipe[3], "x", 1);
-
- /* Wait for systemd to react to the signal above. */
- fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC);
+ r = write(idle_pipe[3], "x", 1);
+ if (r > 0)
+ /* Wait for systemd to react to the signal above. */
+ fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC);