exFAT-fs

exFAT filesystem formatting in Rust.

Features

• exFAT formatting
• no-std support
• reading

Usage

Formatting

use exfat_fs::{
    MB,
    Label,
    format::{Exfat, FormatVolumeOptionsBuilder},
};

use std::{io::Cursor, time::SystemTime};

let size: u64 = 32 * MB as u64;
let hello_label = Label::new("Hello".to_string()).unwrap();

let format_options = FormatVolumeOptionsBuilder::default()
    .pack_bitmap(false)
    .full_format(false)
    .dev_size(size)
    .label(hello_label)
    .bytes_per_sector(512)
    .build()
    .unwrap();

let mut formatter = Exfat::try_from::<SystemTime>(format_options).unwrap();

let mut file = Cursor::new(vec![0u8; size as usize]);

formatter.write::<SystemTime, Cursor<Vec<u8>>>(&mut file).unwrap();

Reading

use exfat_fs::{dir::root::Root, fs::FsElement};
use std::{fs::OpenOptions, io::Read};

let file = OpenOptions::new().read(true).open("exfat_vol").unwrap();

// Load root directory
let mut root = Root::open(file).unwrap();

// Get contents of first element (file)
if let FsElement::F(ref mut file) = root.items()[0] {
    let mut buffer = String::default();
    file.read_to_string(&mut buffer).unwrap();
    println!("Contents of file: {buffer}");
}

Acknowledgements

This crate was inspired by the following releated projects:

• exfatprogs
• obhq/exfat