1 files changed, 19 insertions, 4 deletions

diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh
index eb5ab5b7a5..737dae4cbc 100644
--- a/meta/recipes-core/initrdscripts/files/init-live.sh
+++ b/meta/recipes-core/initrdscripts/files/init-live.sh
@@ -7,6 +7,7 @@ ROOT_IMAGE="rootfs.img"
 MOUNT="/bin/mount"
 UMOUNT="/bin/umount"
 ISOLINUX=""
+UNIONFS="no"
 
 early_setup() {
     mkdir /proc
@@ -89,17 +90,31 @@ case $label in
         mkdir $ROOT_MOUNT
         mknod /dev/loop0 b 7 0 2>/dev/null
 
-        if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
-            fatal "Couldnt mount rootfs image"
+        
+        if [ "$UNIONFS" = "yes" ]; then
+            mkdir /rootfs-tmp
+
+            if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE /rootfs-tmp ; then
+                fatal "Could not mount rootfs image"
+            else
+                mkdir /cow
+                mount -t tmpfs -o rw,noatime,mode=755 tmpfs /cow
+                mount -t unionfs -o dirs=/cow:/rootfs-tmp=ro unionfs $ROOT_MOUNT
+                boot_live_root
+            fi
         else
-            boot_live_root
+            if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
+                fatal "Could not mount rootfs image"
+            else
+                boot_live_root
+            fi
         fi
         ;;
     install)
         if [ -f /media/$i/$ISOLINUX/$ROOT_IMAGE ] ; then
             ./install.sh $i/$ISOLINUX $ROOT_IMAGE $video_mode $vga_mode
         else
-            fatal "Couldnt find install script"
+            fatal "Could not find install script"
         fi
 
         # If we're getting here, we failed...