Modified: branches/PR-5039559/launchd/src/launchd.c (23662 => 23663)

--- branches/PR-5039559/launchd/src/launchd.c	2008-08-14 21:16:49 UTC (rev 23662)
+++ branches/PR-5039559/launchd/src/launchd.c	2008-08-15 02:20:45 UTC (rev 23663)
@@ -96,6 +96,8 @@
 static void fatal_signal_handler(int sig, siginfo_t *si, void *uap);
 static void handle_pid1_crashes_separately(void);
 
+static void update_thread(unsigned int freq);
+
 static bool re_exec_in_single_user_mode;
 static void *crash_addr;
 static pid_t crash_pid;
@@ -165,6 +167,22 @@
 		_vproc_transaction_end();
 	}
 
+//#if TARGET_OS_EMBEDDED
+	if( getpid() == 1 ) {
+		/* Start the update thread -- rdar://problem/5039559 */
+		pthread_t t = NULL;
+		int freq = 30;
+		int err = pthread_create(&t, NULL, (void (*)(void *))update_thread, (void *)freq);
+		if( err != 0 ) {
+			/* If we hit this condition, there's something horribly wrong. 
+			 * We're the first process; we shouldn't be running out of threads or anything 
+			 * whacky like that.
+			 */
+			fprintf(stderr, "%s: Dude, your system is seriously messed up (%d - %s). I'm guessing you'll crash very soon.\n", getprogname(), err, strerror(err));
+		}		
+	}
+//#endif
+
 	jobmgr_init(sflag);
 
 	launchd_runtime_init2();
@@ -187,6 +205,14 @@
 	launchd_assumes(sigaction(SIGSEGV, &fsa, NULL) != -1);
 }
 
+static void update_thread(unsigned int freq)
+{
+	while( true ) {
+		sync();
+		sleep(freq);
+	}
+}
+
 #define PID1_CRASH_LOGFILE "/var/log/launchd-pid1.crash"
 
 /* This hack forces the dynamic linker to resolve these symbols ASAP */