qcow2

qcow2

This crate can parse and read qcow2 virtual disks, as used by qemu and other emulators.

Qcow2 is a flexible format for disk images, that only allocates space as needed. It has many other interesting features.

Example

extern crate positioned_io;
extern crate qcow2;

use positioned_io::ReadAt;
use qcow2::Qcow2;

// Open a qcow2 file.
let file = try!(File::open("image.qcow2"));
let qcow = try!(Qcow2::open(file));

// Read some data from the middle.
let reader = try!(qcow.reader());
let mut buf = vec![0, 4096];
try!(reader.read_exact_at(5 * 1024 * 1024, &mut buf));

Documentation

http://vasi.github.io/qcow2-rs/qcow2/

Usage

This crate works with Cargo and is on crates.io. Add it to your Cargo.toml like so:

[dependencies]
qcow2 = "0.1.0"