Expose loop devices

[Stuart Perkins]

I use a "disk image" on more than one appvm (not at the same time of course) and mounting as a loop device in dom0 then qvm-block attach to the target vm works ... most of the time. I normally get an error concerning qubes not exposing the device until I perform a "cd" command. 

It is a poor implementation of a security intent.  This is how I circumvent...

Open dom0 terminal.

Execute script to loop mount disk image (losetup) and attach to vm via qvm-block.

Get error device not "exposed" 

Unmount loop device.

Issue "cd" command...stay in home dir...change nothing.

Loop mount image.

Qvm-block attach...

Success.

This is repeatable. Is there a way to turn off that "feature"?

I can avoid it by issuing the "cd" command first.