From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Tue, 9 Sep 2014 12:02:00 +0000 (+0200)
Subject: ntp: print warning 10 years before supported time ends
X-Git-Tag: 1.31~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e1accce49868b448cdebe9a03db3f87c63367f83;p=thirdparty%2Fchrony.git

ntp: print warning 10 years before supported time ends
---

diff --git a/ntp_core.c b/ntp_core.c
index 53858f69..ebb6a7c9 100644
--- a/ntp_core.c
+++ b/ntp_core.c
@@ -262,6 +262,9 @@ do_size_checks(void)
 static void
 do_time_checks(void)
 {
+  struct timeval now;
+  time_t warning_advance = 3600 * 24 * 365 * 10; /* 10 years */
+
 #ifdef HAVE_LONG_TIME_T
   /* Check that time before NTP_ERA_SPLIT underflows correctly */
 
@@ -278,6 +281,16 @@ do_time_checks(void)
       tv1.tv_sec + (1ULL << 32) - 1 == tv2.tv_sec;
 
   assert(r);
+
+  LCL_ReadRawTime(&now);
+  if (tv2.tv_sec - now.tv_sec < warning_advance)
+    LOG(LOGS_WARN, LOGF_NtpCore, "Assumed NTP time ends at %s!",
+        UTI_TimeToLogForm(tv2.tv_sec));
+#else
+  LCL_ReadRawTime(&now);
+  if (now.tv_sec > 0x7fffffff - warning_advance)
+    LOG(LOGS_WARN, LOGF_NtpCore, "System time ends at %s!",
+        UTI_TimeToLogForm(0x7fffffff));
 #endif
 }