+ ( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
+ /etc/sysupgrade.conf /lib/upgrade/keep.d/* 2>/dev/null) \
+ -type f -o -type l 2>/dev/null;
+ opkg list-changed-conffiles ) | sort -u > "$file"
+ return 0
+}
+
+add_overlayfiles() {
+ local file="$1"
+ if [ -d /overlay/upper ]; then
+ local overlaydir="/overlay/upper"
+ else
+ local overlaydir="/overlay"
+ fi
+ find $overlaydir/etc/ -type f -o -type l | sed \
+ -e 's,^/overlay\/upper/,/,' \
+ -e 's,^/overlay/,/,' \
+ -e '\,/META_[a-zA-Z0-9]*$,d' \
+ -e '\,/functions.sh$,d' \
+ -e '\,/[^/]*-opkg$,d' \
+ > "$file"