initscripts: Add support for /etc/default/timestamp

Source /etc/default/timestamp if present. This allows the rootfs to be
read-only / store the file in a persistant location if the whole rootfs
is updated.

(From OE-Core rev: b4de37b7176630d9585b12c50d537cd561c7aeb9)

Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 1 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 1632a5f649..ffa1eee43d 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 +9,9 @@
 # Description:       
 ### END INIT INFO
 
+TIMESTAMP_FILE=/etc/timestamp
+
+[ -f /etc/default/timestamp ] && . /etc/default/timestamp
+
 # Update the timestamp
-date -u +%4Y%2m%2d%2H%2M%2S 2>/dev/null > /etc/timestamp
+date -u +%4Y%2m%2d%2H%2M%2S 2>/dev/null > "$TIMESTAMP_FILE"