Custom UID/GID and file permissions

[inmaldrerah]

I'm using the same ZFS pool for Windows and Linux, and I wonder if there is a way to set the UID/GID and permissions of newly created/edited files on Windows.

I would like to set them to, e.g. 1000:1000 0664 (files)/0775 (dirs) or so. Is it already supported, or only defaults are available for now?

Previously I got root:root with 0000 permission, and now on zfswin-2.3.1rc12 (I haven't got time to upgrade to rc13 yet), I have 1001:1001 with 0000 permission. (even directories are non-executable, as far as I remember)

[lundman]

Right now I don't think there is a way around it. It takes the Windows OwnerSID and stripped off the last number for UID. You could try running chown from cygwin, or a msys program (git bash for Windows for example). There is a bit of posix code in there.

In future we might have to think about what we could do. btrfs has a Registry entry where you can map Windows SID to Unix UID, but that wouldn't be my favourite. Could do a small util that lets you.

[inmaldrerah]

Thanks. I think I will change the owner in Linux if required then.

Also, what about the file permissions? Are they just defaulted to all zero?

[lundman]

are they? Hmmm files it should use:

https://github.com/openzfsonwindows/openzfs/blob/zfs-Windows-2.3.1-release/module/os/windows/zfs/zfs_vnops_windows.c#L2248-L2250

is that not what you see?

[inmaldrerah]

Just re-checked. It is --------- (0000) here on Linux (NixOS), for files created in Windows.

By the way, I'm using acltype=posix, not sure if it's related.