Struct udev::MonitorSocket

pub struct MonitorSocket { /* private fields */ }

An active monitor that can receive events.

The events received by a Socket match the filters set up by the Monitor that created the socket.

Monitors are initially set up to receive events from the kernel via a nonblocking socket. A variant of poll() should be used on the file descriptor returned by the AsRawFd trait to wait for new events.

Implementations

impl Socket

pub fn iter(&self) -> SocketIter<'_>

Create an iterator of socket event messages

Examples found in repository

examples/monitor.rs (line 73)

    pub fn poll(socket: udev::MonitorSocket) -> io::Result<()> {
        println!("Use syspoll");
        let mut fds = vec![pollfd {
            fd: socket.as_raw_fd(),
            events: POLLIN,
            revents: 0,
        }];

        loop {
            let result = unsafe {
                ppoll(
                    (&mut fds[..]).as_mut_ptr(),
                    fds.len() as nfds_t,
                    ptr::null_mut(),
                    ptr::null(),
                )
            };

            if result < 0 {
                return Err(io::Error::last_os_error());
            }

            let event = match socket.iter().next() {
                Some(evt) => evt,
                None => {
                    thread::sleep(Duration::from_millis(10));
                    continue;
                }
            };

            super::print_event(event);
        }
    }

Trait Implementations

impl AsFd for Socket

Provides raw access to the monitor’s socket.

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

Returns the file descriptor of the monitor’s socket.

impl AsRaw<udev_monitor> for Socket

fn as_raw(&self) -> *mut udev_monitor

Get a reference of the underlying struct.

fn into_raw(self) -> *mut udev_monitor

Convert the object into the underlying pointer.

impl AsRawFd for Socket

Provides raw access to the monitor’s socket.

fn as_raw_fd(&self) -> RawFd

Returns the file descriptor of the monitor’s socket.