int r, q;
char *cgroup_user_tree = NULL;
- if ((r = write_one_line_file("/run/nologin", "System is going down.")) < 0)
+ if ((r = write_one_line_file_atomic("/run/nologin", "System is going down.")) < 0)
log_error("Failed to create /run/nologin: %s", strerror(-r));
if ((q = cg_get_user_path(&cgroup_user_tree)) < 0) {