[OE-core] [PATCH] initscripts: do not save timestamp for readonly system

[Ming Liu]

From: Ming Liu <peter.x.liu at external.atlascopco.com>

To avoid reporting errors for /etc/timestamp is not writeable in a
readonly system.

Signed-off-by: Ming Liu <peter.x.liu at external.atlascopco.com>
---
 meta/recipes-core/initscripts/initscripts-1.0/save-rtc.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/meta/recipes-core/initscripts/initscripts-1.0/save-rtc.sh b/meta/recipes-core/initscripts/initscripts-1.0/save-rtc.sh
index b038fc5..0f7aa20 100644
--- a/meta/recipes-core/initscripts/initscripts-1.0/save-rtc.sh
+++ b/meta/recipes-core/initscripts/initscripts-1.0/save-rtc.sh
@@ -9,5 +9,7 @@
 # Description:       
 ### END INIT INFO
 
-# Update the timestamp
-date -u +%4Y%2m%2d%2H%2M%2S > /etc/timestamp
+# Update the timestamp for non-readonly system
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+
+[ "$ROOTFS_READ_ONLY" = "no" ] && date -u +%4Y%2m%2d%2H%2M%2S > /etc/timestamp
-- 
1.9.1