+ if ((old_hostname = gethostname_malloc())) {
+ bool already_set;
+
+ already_set = old_hostname[0] != 0;
+ free(old_hostname);
+
+ if (already_set)
+ goto finish;
+ }
+
+ hn = "localhost";
+ }
+
+ if (sethostname(hn, strlen(hn)) < 0) {
+ log_warning("Failed to set hostname to <%s>: %m", hn);
+ r = -errno;
+ } else