This is a simple script that packs a set of files into a drive image containing a vfat formated partition by creating a sparse file to comsume as small disk space as possible.
The script requires a few packages being installed:
- mtools
- util-linux
- dosfstools
- python3
To make sure those tools are installed, you can use the following command on ubuntu/debian:
sudo apt install util-linux mtools dosfstools python3
Let's say you created a directory called files containing the files you
want to see on the disk image, you can use the following command to create
the image file:
python3 make_vfat.py files output.img
This will create a 32GB image named output.img. You can modify the size
for the image using the --size parameter. The size can be provided in MB
only. You can also set a label for the vfat partition, using the --label
parameter.
The script will check, if the output file already exists. Using --force
will delete the output file, before starting to write.
This command will create a 8192MB sized image containing a partition with the filesystem label TRANSFER holding all the files from the usb directory:
python3 usb/scripts/make_vfat.py --size=8192 --label=TRANSFER --force usb output.img