swysocki/gpt-image

Tool to create GPT disk image files

gpt-image's Issues

Output table data

Output information about the GPT table for each class. JSON would be useful!

Additional Partition Type GUIDs

Partition entry count is not accurate

Partition entry field (0x50) is hard-coded to the max entries 128*128. Set this field to the actual count of partition entries.

Allow Partition Editing

Allow the modification of partition information:

• change name
• change size (if it will not be destructive)
• change GUID type
• change UUID

Primary and backup Header GUID's don't match

A GUID is generated for each GPT header. The GUID needs to match for both the primary and backup header. This creates a corrupt disk image.

Add write feature

Allow bytes to be written to a partition

Allow Partition Deletion

Allow the removal of a partition from disk.

• accept input as GUID or name (if unique)
• remove from primary table
• remove from secondary table
• recalculate checksums

Deprecate Entry module

Replace the Entry module with a simpler pattern for constructing the byte structure based on the struct.Struct object. Something similar to what the gptsum project uses: https://github.com/NicolasT/gptsum/blob/main/src/gptsum/gpt.py

Calculate free space

Disk space is finite. There needs to be a check to ensure there is enough room to add a partition.

Use EFI spec names as attributes

Use the table Mnemonic names from the EFI Spec: https://www.intel.com/content/dam/doc/product-specification/efi-v1-10-specification.pdf as class attributes.

This will make it easier when comparing with the EFI spec.

Variable Sector Size

Sector size is hard-coded to 512 bytes. This is an obvious limitation 😨

Allow overwriting image file

self.image_path.touch(exists_ok=False) does not allow overwriting the image file. This should be an option.

Setup Semantic Release

https://github.com/relekang/python-semantic-release

https://python-semantic-release.readthedocs.io/en/latest/automatic-releases/github-actions.html

Protective MBR Size Error

sfdisk reports:

GPT PMBR size mismatch (4096 != 4095) will be corrected by write.

Validate partition length will fit

Check to ensure a partition's length will fit within the disk and not overwrite another
Check to ensure it fits within the boundaries CONSIDERING the backup GPT table at the end of disk

Change Disk Open API

Opening an existing disk is a bit cumbersome because a Disk instance needs to be created. It will be less confusing to call
Disk.open('my-image.gpt') and return a Disk instance.

Set partition attributes

enable setting partition attributes such as read-only and hidden

Specify Partition Start Position

Allow starting a partition at a specific LBA. Make necessary calculations for alignment.

Add Python type tests to CI workflow

Create an integration test using external GPT tool

Validate the generated image is valid using an external tool such as sfdisk or sgdisk.

Add this test to CI.