diff --git a/package/base-files/files/lib/functions.sh b/package/base-files/files/lib/functions.sh
index b0665d929..c688ac77e 100644
--- a/package/base-files/files/lib/functions.sh
+++ b/package/base-files/files/lib/functions.sh
@@ -209,10 +209,10 @@ add_group_and_user() {
 	if [ -n "$rusers" ]; then
 		local tuple oIFS="$IFS"
 		for tuple in $rusers; do
-			local uid gid uname gname
+			local uid gid uname gname addngroups addngroup addngname addngid
 
 			IFS=":"
-			set -- $tuple; uname="$1"; gname="$2"
+			set -- $tuple; uname="$1"; gname="$2"; addngroups="$3"
 			IFS="="
 			set -- $uname; uname="$1"; uid="$2"
 			set -- $gname; gname="$1"; gid="$2"
@@ -232,7 +232,24 @@ add_group_and_user() {
 				group_add_user "$gname" "$uname"
 			fi
 
-			unset uid gid uname gname
+			if [ -n "$uname" ] &&  [ -n "$addngroups" ]; then
+				oIFS="$IFS"
+				IFS=","
+				for addngroup in $addngroups ; do
+					IFS="="
+					set -- $addngroup; addngname="$1"; addngid="$2"
+					if [ -n "$addngid" ]; then
+						group_exists "$addngname" || group_add "$addngname" "$addngid"
+					else
+						group_add_next "$addngname"
+					fi
+
+					group_add_user "$addngname" "$uname"
+				done
+				IFS="$oIFS"
+			fi
+
+			unset uid gid uname gname addngroups addngroup addngname addngid
 		done
 	fi
 }
@@ -245,11 +262,6 @@ default_postinst() {
 
 	add_group_and_user "${pkgname}"
 
-	if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
-		( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
-		ret=$?
-	fi
-
 	if [ -d "$root/rootfs-overlay" ]; then
 		cp -R $root/rootfs-overlay/. $root/
 		rm -fR $root/rootfs-overlay/
@@ -275,6 +287,11 @@ default_postinst() {
 		rm -f /tmp/luci-indexcache
 	fi
 
+	if [ -f "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" ]; then
+		( . "$root/usr/lib/opkg/info/${pkgname}.postinst-pkg" )
+		ret=$?
+	fi
+
 	local shell="$(command -v bash)"
 	for i in $(grep -s "^/etc/init.d/" "$root$filelist"); do
 		if [ -n "$root" ]; then
@@ -314,13 +331,19 @@ find_mtd_part() {
 }
 
 find_mmc_part() {
-	local DEVNAME PARTNAME
+	local DEVNAME PARTNAME ROOTDEV
 
 	if grep -q "$1" /proc/mtd; then
 		echo "" && return 0
 	fi
 
-	for DEVNAME in /sys/block/mmcblk*/mmcblk*p*; do
+	if [ -n "$2" ]; then
+		ROOTDEV="$2"
+	else
+		ROOTDEV="mmcblk*"
+	fi
+
+	for DEVNAME in /sys/block/$ROOTDEV/mmcblk*p*; do
 		PARTNAME="$(grep PARTNAME ${DEVNAME}/uevent | cut -f2 -d'=')"
 		[ "$PARTNAME" = "$1" ] && echo "/dev/$(basename $DEVNAME)" && return 0
 	done
@@ -348,7 +371,7 @@ group_add_next() {
 		return
 	fi
 	gids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/group)
-	gid=65536
+	gid=32768
 	while echo "$gids" | grep -q "^$gid$"; do
 		gid=$((gid + 1))
 	done
@@ -363,6 +386,9 @@ group_add_user() {
 	echo "$grp" | grep -q ":$" && delim=""
 	[ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
 	sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
+	if [ -z "$IPKG_INSTROOT" ] && [ -x /usr/sbin/selinuxenabled ] && selinuxenabled; then
+		restorecon /etc/group
+	fi
 	[ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
 }
 
@@ -376,7 +402,7 @@ user_add() {
 	local rc
 	[ -z "$uid" ] && {
 		uids=$(cut -d: -f3 ${IPKG_INSTROOT}/etc/passwd)
-		uid=65536
+		uid=32768
 		while echo "$uids" | grep -q "^$uid$"; do
 			uid=$((uid + 1))
 		done