[base-files]: fix sysupgrade on overlayfs v23+

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43365 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index 6e63783..215f482 100755 (executable)
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -109,7 +109,12 @@ add_uci_conffiles() {
 
 add_overlayfiles() {
        local file="$1"
-       find /overlay/etc/ -type f -o -type l | sed \
+       if [ -d /overlay/upper ]; then
+               local overlaydir="/overlay/upper"
+       else
+               local overlaydir="/overlay"
+       fi
+       find $overlaydir/etc/ -type f -o -type l | sed \
                -e 's,^/overlay/,/,' \
                -e '\,/META_[a-zA-Z0-9]*$,d' \
                -e '\,/functions.sh$,d' \