How do I sync permissions?

[matdave]

Right now I am running into an issue where if I create a file in the dev container (using microsandbox as backend), it will show in my local directory as 600 instead of 644.

Additionally, when I have a container running, if I create a file/folder in my local directory, the container will see it as root:root.

Is it possible to correct these?

[TongyiDai]

This should be handled by the MicroSandbox workspace mount policy rather than by making the container UID literally match the host UID.

First check msb --version. Devsy requires MicroSandbox 0.7.2 or newer for workspace ownership synchronization; update with msb self update if necessary, then recreate the dev container.

For the workspace, Devsy’s current defaults are:

• MICROSANDBOX_WORKSPACE_STAT_VIRTUALIZATION=strict
• MICROSANDBOX_WORKSPACE_HOST_PERMISSIONS=mirror

Stat virtualization is what makes host-created files appear with usable guest ownership instead of literal root:root. The MicroSandbox driver deliberately does not rewrite the container user UID, because ownership is virtualized by the virtiofs mount.

host-perms=mirror means guest chmod bits are mirrored to the host inode. Therefore a file created as 0600 in the container remaining 0600 on the host is expected under that policy; it is not automatically converted to 0644. If you do not want guest mode changes/umask to affect the host workspace, set:

MICROSANDBOX_WORKSPACE_HOST_PERMISSIONS=private

and recreate the sandbox. If you want mirroring, instead fix the creator’s umask inside the dev container (normally 0022 for files to land as 0644).

Do not combine stat-virt=off with host-perms=mirror; Devsy rejects that combination. If host-created entries still show as root:root with version 0.7.2+, strict virtualization, and a freshly recreated sandbox, please include the Devsy/MicroSandbox versions, host OS/filesystem, effective provider variables, and stat output for the same path on both host and guest—that would indicate the virtualization path is not taking effect.