Script fails with "failed to setup loop device"

[christau]

Hi and thanks for sharing your work,
I wanted to test this, but I always get

[Format partition with ext3]
losetup: /os/linux.img: failed to set up loop device: Device or resource busy
Makefile:51: recipe for target 'linux.img' failed
make[1]: *** [linux.img] Error 1

I ran the following cmd line

sudo make ubuntu

It also failed with the same message when doing

sudo make debian

I'm running on an ubuntu 18.04.
Did I make any mistake in calling your script?

Update: I already checked issue #1 and added '--privileged=true' but the error still came up.

[christau]

I guess I found the problem.
In the makefile it says --device=/dev/loop0 but the loop0 on my system is already taken by snapd.
So I had to change the lines in Makefile and create_image.sh to a free loopback device.
Maybe it's more universal to get a free loop device by issuing losetup -f.
Just hadn't the time to investigate realization. But if I have, I will post it here.
Thanks!

[iximiuz]

I will keep the issue open for a while. Hopefully, I will have some spare time to make the device allocation automatic sooner or later. Thanks for the report.

[christau]

I added the PR #3 with the needed changes. Hopefully you will review and accept.
Thank you.