Don't call daemon() in cron on Fuchsia

Change-Id: If7a9fb468f48613e634295641a8eff097c483c5d
diff --git a/cron.c b/cron.c
index 77304cc..50ff4de 100644
--- a/cron.c
+++ b/cron.c
@@ -508,7 +508,12 @@
 
 	if (nflag == 0) {
 		openlog(argv[0], LOG_CONS | LOG_PID, LOG_CRON);
-		if (daemon(1, 0) < 0) {
+		// TODO(kulakowski) Allow this to go the background in
+		// a fuchsia-idiomatic way. Relying on daemon(3), with
+		// it's fork-dependent semantics, won't work.
+		const int backgrounding_succeeded = 0;
+		errno = ENOSYS;
+		if (!backgrounding_succeeded) {
 			logerr("error: failed to daemonize %s\n", strerror(errno));
 			return 1;
 		}