Suppress useless warnings during udev startup

I have a number of platforms which have no realtime clock (i.e. no sense of what day/time it is). On these platforms, poky dutifully tries to keep somewhat sane with stored time stamps that are saved on reboot and restored early on during initialization. A fair compromise.

However, before that code runs, the udev script tries to
restore well known devices using tar. This will often
lead to messages such as these since the kernel has no
way to set the time:
tar: dev/pts: implausibly old time stamp 1970-01-01 00:00:00
tar: dev/char/3:134: time stamp 1970-01-01 00:00:09 is 0.435041705 s in the future

The attached patch filters these messages out as they don't convey anything useful and indeed are worrisome to more naive users.

------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

From a6773d3e00dbd168817730fff1c3fc7e1b6950f5 Mon Sep 17 00:00:00 2001
From: Gary Thomas <[email protected]>
Date: Thu, 17 Feb 2011 11:30:18 -0700
Subject: [PATCH] Suppress messages about bad time stamps during initial device setup

---
 meta/recipes-core/udev/udev-164/init |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index eb5e507..1a8fca5 100644
@@ -35,7 +35,7 @@ LANG=C awk "\$2 == \"/dev\" && \$4 == \"tmpfs\" { exit 1 }" /proc/mounts && {
 }
 
 if [ -e /etc/dev.tar ]; then
-	(cd /; tar xf /etc/dev.tar)
+	(cd /; tar xf /etc/dev.tar 2>&1 | grep -v 'time stamp')
 	not_first_boot=1
 fi
 

1.7.3.4