Unionfs isn't available everywhere, and we can get similar results (if
not quite as neatly) by using bind mounts + tmpfs and copying the data
over.
(From OE-Core rev:
5a8ba93efa554c3b4d3b48ca8d668419a8c77f42)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[ "$ROOTFS_READ_ONLY" = "no" ] && exit 0
-# Make sure unionfs is in /proc/filesystems
-if ! grep -q unionfs /proc/filesystems; then
- echo "ERROR: unionfs not supported by kernel!"
- exit 1
+if [ "$1" = "start" ] ; then
+ mkdir -p /var/volatile/lib
+ cp -a /var/lib/* /var/volatile/lib
+ mount --bind /var/volatile/lib /var/lib
fi
-mkdir -p /var/volatile/lib
-mount -t unionfs -o dirs=/var/volatile/lib:/var/lib=ro none /var/lib
-
-if [ $? != 0 ]; then
- echo "ERROR: Union mount failed!"
- exit 1
-fi