File 0001-core-emit-TZ-warning-on-startup-not-on-Linux-non-con.patch of Package rsyslog.12861

From d26343dc2fcfa4773da4e97e178ea3d94c3da120 Mon Sep 17 00:00:00 2001
From: Rainer Gerhards <rgerhards@adiscon.com>
Date: Mon, 17 Sep 2018 08:56:09 +0200
Subject: [PATCH] core: emit TZ warning on startup not on Linux non-container

On Linux it seems common that the TZ variable is NOT properly set.
There are some concerns that the warning related to rsyslog correcting
this confuses users. It also seems that the corrective action rsyslog
takes is right, and so there is no hard need to inform users on that.
In Linux containers, however, the warning seems to be useful as the
timezone setup there seems to be frequently-enough different and
rsyslog's corrective action may not be correct.

So we now check if we are running under Linux and not within a container.
If so, we do not emit the warning. In all other case, we do. This is
based on the assumption that other unixoid systems still should have
TZ properly set.

closes https://github.com/rsyslog/rsyslog/issues/2994

(cherry picked from commit 502759aea05abaf9a405278e4fe3c41a9c0edaeb)
---
 tools/rsyslogd.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/tools/rsyslogd.c b/tools/rsyslogd.c
index 4fad3ad5c..93308ac9b 100644
--- a/tools/rsyslogd.c
+++ b/tools/rsyslogd.c
@@ -61,6 +61,17 @@
 #include "dirty.h"
 #include "janitor.h"
 
+/* some global vars we need to differentiate between environments,
+ * for TZ-related things see
+ * https://github.com/rsyslog/rsyslog/issues/2994
+ */
+static int runningInContainer = 0;
+#ifdef OS_LINUX
+static int emitTZWarning = 0;
+#else
+static int emitTZWarning = 1;
+#endif
+
 #if defined(_AIX)
 /* AIXPORT : start
  * The following includes and declarations are for support of the System
@@ -1307,8 +1318,12 @@ initAll(int argc, char **argv)
 		const char *const tz =
 			(access("/etc/localtime", R_OK) == 0) ? "TZ=/etc/localtime" : "TZ=UTC";
 		putenv((char*)tz);
-		LogMsg(0, RS_RET_NO_TZ_SET, LOG_WARNING, "environment variable TZ is not "
-			"set, auto correcting this to %s\n", tz);
+		if(emitTZWarning) {
+			LogMsg(0, RS_RET_NO_TZ_SET, LOG_WARNING, "environment variable TZ is not "
+				"set, auto correcting this to %s", tz);
+		} else {
+			dbgprintf("environment variable TZ is not set, auto correcting this to %s\n", tz);
+		}
 	}
 
 	/* END core initializations - we now come back to carrying out command line options*/
@@ -1960,6 +1975,8 @@ main(int argc, char **argv)
 			"terminate rsyslog\n", VERSION);
 		PidFile = strdup("NONE"); /* disables pid file writing */
 		glblPermitCtlC = 1;
+		runningInContainer = 1;
+		emitTZWarning = 1;
 	} else {
 		/* "dynamic defaults" - non-container case */
 		PidFile = strdup(PATH_PIDFILE);
-- 
2.16.4