You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: linux-inotify.rs
    path of file: ./repos/smol/examples
    
    the code of the file until where you have to start completion: //! Uses the `inotify` crate to watch for changes in the current directory.
//!
//! Run with:
//!
//! ```
//! cargo run --example linux-inotify
//! ```

#[cfg(target_os = "linux")]
fn main() -> std::io::Result<()> {
    use std::ffi::OsString;
    use std::os::unix::io::AsFd;

    use inotify::{EventMask, Inotify, WatchMask};
    use smol::{io, Async};

    type Event = (OsString, EventMask);

    /// Reads some events without blocking.
    ///
    /// If there are no events, an [`io::ErrorKind::WouldBlock`] error is returned.
    fn read_op(inotify: &mut Inotify) -> io::Result<Vec<Event>> {

    
fn main() -> std::io::Result<()> {
    use std::ffi::OsString;
    use std::os::unix::io::AsFd;

    use inotify::{EventMask, Inotify, WatchMask};
    use smol::{io, Async};

    type Event = (OsString, EventMask);

    /// Reads some events without blocking.
    ///
    /// If there are no events, an [`io::ErrorKind::WouldBlock`] error is returned.
    fn read_op(inotify: &mut Inotify) -> io::Result<Vec<Event>> {
        let mut buffer = [0; 1024];
        let events = inotify
            .read_events(&mut buffer)?
            .filter_map(|ev| ev.name.map(|name| (name.to_owned(), ev.mask)))
            .collect::<Vec<_>>();

        if events.is_empty() {
            Err(io::ErrorKind::WouldBlock.into())
        } else {
            Ok(events)
        }
    }

    smol::block_on(async {
        // Watch events in the current directory.
        let mut inotify = Inotify::init()?;
        let source = Async::new(inotify.as_fd().try_clone_to_owned()?)?;
        inotify.watches().add(".", WatchMask::ALL_EVENTS)?;
        println!("Watching for filesystem events in the current directory...");
        println!("Try opening a file to trigger some events.");
        println!();

        // Wait for events in a loop and print them on the screen.
        loop {
            for event in source.read_with(|_| read_op(&mut inotify)).await? {
                println!("{:?}", event);
            }
        }
    })
}