Module rootfs 

Root filesystem management for Microsandbox sandboxes.

This module provides functionality for managing root filesystems used by Microsandbox sandboxes. It handles the creation, extraction, and merging of filesystem layers following OCI (Open Container Initiative) specifications.

Constants

OPAQUE_WHITEOUT_MARKER

The opaque directory marker file name used in OCI layers.

WHITEOUT_PREFIX

The prefix for whiteout files in OCI layers.

Functions

copy_dir_recursive

Recursively copies a directory from source to destination, preserving file permissions.

patch_with_default_dns_settings

Updates the /etc/resolv.conf file in the guest rootfs to add default DNS servers if none exist. Creates the file if it doesn’t exist.

patch_with_sandbox_scripts

Updates a rootfs by adding sandbox script files to a /.sandbox_scripts directory.

patch_with_stat_override

Sets the user.containers.override_stat xattr on the rootfs directory.

patch_with_virtiofs_mounts

Updates the /etc/fstab file in the guest rootfs to mount the mapped directories. Creates the file if it doesn’t exist.