Directory Structure 2 disk Image

WIP tool to create disk images + copy files on to partitions based on a config file

Why?

I'm currently trying to create a bootloader capable of booting a Linux kernel with uefi-rs, but didn't want to keep manually creating/partitioning disk images, mounting them, and copying files over every time I recompiled, but couldn't find a better tool for automating the process, so I'm writing this to speed up iteration on that process.

Usage

Note: the config file is not fully implemented

Usage: ds2img [OPTIONS]

Options:
  -c, --config <CONFIG>  Path to partition config file [default: ds2img.toml]
  -o, --output <OUTPUT>  Path to create the image [default: root.img]
  -h, --help             Print help

To mount the image, run:

$ sudo kpartx -av root.img

example output:

add map loop1p1 (254:1): 0 45 linear 7:1 34

Partitions will show up under /dev/mapper, e.g.:

$ ls -l /dev/mapper
lrwxrwxrwx  254,1 root root  5 Oct 16:53  loop1p1 -> ../dm-1

To unmount the image, run:

$ sudo kpartx -d root.img

Note: Make sure you unmount any mounted partitions or it will fail to remove the loopback devices

Credit

mkimg was very helpful for figuring out how to use fatfs to create FAT32 partitions and gpt to create GPT partition tables.