We are using Yocto (jethro and krogoth) to build an image for a device.
I organized the compilation process into multiple stages for easier
integration with our tooling. The last stage is a call to `wic` to
create a drive image that we can then `dd` to a real drive to get a
workable system.
I am faced with a problem where I would like the top-level directory of
one of the partition created by wic to have a different owner than root.
I am able to tell wic the partition information (size, filesystem, etc.)
but I can't find a way to tell wic to change permissions of
files/directories inside the partition...
As an example I have an entry like the following at the end of my `.wks`:
> part /opt/mnt --label extra --fstype=ext4 --align 1024
--ondisk sda --size=2040
which will add an extra partition after all others on the final image.
An entry in `/etc/fstab` will be added so that the partition will be
mounted to `/opt/mnt`.
Note that the partition should be empty: I'm not populating it with any
files or directories.
But after booting the system, the directory `/opt/mnt` will have the
permissions of the top-level directory of the created partition, and by
default those are `0755` and owned by `root:root`.
So my question is: How can I change this so that it's owned by a
specific uid and gid (`1000:1000`)?
I am investigating plugins for now (for example by having a
`meta-mylayer/scripts/lib/wic/plugins/source/fsimage-mypartition.py`)
but I still can't see how I can change the owner of the directory.
Should I provide a rootfs-like directory which is empty but owned by the
proper uid and gid?
Note that letting users be able to mount the partition (by adding
`users` to `/etc/fstab`) is not what I want; it would _not_ change the
permissions/owner of the top-level directory of the partition.
Thank you very much!
Regards,
Nicolas
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