Read and extract files from UDF

[dependencies]
hadris-udf = "2.1.0"

The UDF reader exposes owned directory metadata and reads a selected file into a byte vector.

use hadris_udf::UdfVolume;
use std::{fs, fs::File};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let volume = UdfVolume::open(File::open("disc.udf")?)?;
    println!("volume: {}", volume.info().volume_id);

    let root = volume.root_dir()?;
    for entry in root.entries() {
        let kind = if entry.is_dir() { "dir " } else { "file" };
        println!("{kind} {:>10} {}", entry.size, entry.name());
    }

    let entry = root.find("README.TXT").ok_or("README.TXT not found")?;
    let contents = volume.read_file(entry)?;
    fs::write("README.TXT", contents)?;

    Ok(())
}

read_file rejects directory entries and validates the file's allocation descriptors before returning data. Do not join an untrusted on-disk filename directly to an extraction directory; reject absolute paths and parent components first.

For an unknown ISO/UDF image, open through hadris-optical so bridge-image selection is explicit. The hadris-udf CLI provides recursive listing and extraction for hosted workflows.