Struct LoopControl

pub struct LoopControl { /* private fields */ }

Interface to the loop control device: /dev/loop-control.

Implementations

impl LoopControl

pub fn open() -> Result<Self>

Opens the loop control device.

Errors

This function will return an error for various reasons when opening the loop control file /dev/loop-control. See OpenOptions::open for further details.

pub fn next_free(&self) -> Result<LoopDevice>

Finds and opens the next available loop device.

Examples

use loopdev::LoopControl;
let lc = LoopControl::open().unwrap();
let ld = lc.next_free().unwrap();
println!("{}", ld.path().unwrap().display());

Errors

This function will return an error for various reasons when opening the loop device file /dev/loopX. See OpenOptions::open for further details.

pub fn add(&self, n: u32) -> Result<LoopDevice>

Add and opens a new loop device.

Examples

use loopdev::LoopControl;
let lc = LoopControl::open().unwrap();
let ld = lc.add(1).unwrap();
println!("{}", ld.path().unwrap().display());

Errors

This funcitons will return an error when a loop device with the passed number exists or opening the newly created device fails.

Trait Implementations

impl AsRawFd for LoopControl

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor.

impl Debug for LoopControl

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl IntoRawFd for LoopControl

fn into_raw_fd(self) -> RawFd

Consumes this object, returning the raw underlying file descriptor.