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initscripts: fix read-only-rootfs-hook.sh to avoid using unionfs

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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>
This commit is contained in:
Paul Eggleton
2013-04-10 13:23:37 +00:00
committed by Richard Purdie
parent cf569f5def
commit 1b7785c537
1 changed files with 4 additions and 11 deletions
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15
meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh
View File

@@ -4,16 +4,9 @@
[ "$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