Android permission denied for /dev directory

Question

I need to be able to read/write file "/dev/block/mmcblk0" from Android application code. But it is not read/write. What to do in this case? I use Jelly Bean.

Answer 1

You must be loged as root user (root the device).

@user1379574:

No, you can't.

That is a system directory, not yours, you usually don't have nothing to do here...

And if you need to do something here you must have permissions to do it (been root).