How to dump filesystem /dev/fuse in android?

view story

http://stackoverflow.com – I want to dump /dev/fuse in my smartphone. I'm using Pantech Vega R3 which is Jellybean. I'd try to the followings. >adb shell shell@android:/ $ dd if=/dev/fuse of=/storage/sdcard1 bs=2048 /dev/fuse: cannot open for read: Permission denied. sdcard1 is external sd. Do I have to root my phone? If I have to root , how can I root JellyBean? I'm sorry that i'm not good at english. (HowTos)