Struct UeventListener

pub struct UeventListener { /* private fields */ }

A listener for Linux udev events.

Implementations

impl UeventListener

pub fn new(driver: &impl SpawnDriver) -> Result<Self, NewUeventListenerError>

Opens a new netlink socket and starts listening on it.

pub async fn add_custom_callback( &self, callback: impl 'static + Send + FnMut(Notification<'_>), ) -> CallbackHandle

Adds a callback function that receives every event.

pub async fn add_block_resize_callback( &self, major: u32, minor: u32, notify: impl 'static + Send + FnMut(), ) -> CallbackHandle

Adds a callback that runs when the block device with the given major/minor numbers has been resized or a rescan event was triggered where the caller is required to rescan for the condition

pub async fn wait_for_matching_child<T, F, Fut>( &self, path: &Path, f: F, ) -> Result<T>

where F: Fn(PathBuf, bool) -> Fut, Fut: Future<Output = Option<T>>,

Waits for a child of the provided devpath (typically something under /sys) to exist.

If it does not immediately exist, this will poll the path for existence each time a new uevent arrives.

f will be called with the file name of the child, and a boolean: true if the child was found by uevent, false if it was found by sysfs. It should return Some(_) if the child is the correct one.

This is inefficient if there are lots of waiters and lots of incoming uevents, but this is not an expected use case.

pub async fn wait_for_devpath(&self, path: &Path) -> Result<()>

Waits for the provided devpath (typically something under /sys) to exist.

If it does not immediately exist, this will poll the path for existence each time a new uevent arrives.

This is inefficient if there are lots of waiters and lots of incoming uevents, but this is not an expected use case.