Struct HotplugMonitor 

pub struct HotplugMonitor { /* private fields */ }

A pollable watch on DRM hotplug.

Add AsFd to the poll set that already has the input devices and the card in it, and call dispatch when it is readable.

Implementations

impl HotplugMonitor

pub fn open(source: Source) -> Result<Self>

Start watching.

Errors

CoreError::Io if udev is unavailable – no /run/udev, or a container without the netlink socket. A caller that cannot watch can still poll connectors on a timer; what it loses is knowing when.

pub fn dispatch(&mut self, out: &mut Vec<HotplugEvent>)

Read every pending uevent, appending the ones that are hotplug.

Everything is drained whether or not it is kept, so the descriptor goes back to unreadable and a caller polling in a loop does not spin.

Trait Implementations

impl AsFd for HotplugMonitor

fn as_fd(&self) -> BorrowedFd<'_>

Borrows the file descriptor.

impl Debug for HotplugMonitor

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

The socket has nothing printable in it; the descriptor is what a caller debugging a poll set is looking for.