65 lines
1.8 KiB
Rust
65 lines
1.8 KiB
Rust
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//! Uses the `inotify` crate to watch for changes in the current directory.
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//!
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//! Run with:
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//!
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//! ```
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//! cargo run --example linux-inotify
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//! ```
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#[cfg(target_os = "linux")]
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fn main() -> std::io::Result<()> {
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use std::ffi::OsString;
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use std::io;
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use async_io::Async;
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use futures_lite::future;
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use inotify::{EventMask, Inotify, WatchMask};
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type Event = (OsString, EventMask);
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/// Reads some events without blocking.
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///
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/// If there are no events, an [`io::ErrorKind::WouldBlock`] error is returned.
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fn read_op(inotify: &mut Inotify) -> io::Result<Vec<Event>> {
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let mut buffer = [0; 1024];
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let events = inotify
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.read_events(&mut buffer)?
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.filter_map(|ev| ev.name.map(|name| (name.to_owned(), ev.mask)))
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.collect::<Vec<_>>();
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if events.is_empty() {
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Err(io::ErrorKind::WouldBlock.into())
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} else {
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Ok(events)
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}
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}
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future::block_on(async {
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// Watch events in the current directory.
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let mut inotify = Async::new(Inotify::init()?)?;
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// SAFETY: We do not move the inner file descriptor out.
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unsafe {
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inotify
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.get_mut()
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.watches()
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.add(".", WatchMask::ALL_EVENTS)?;
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}
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println!("Watching for filesystem events in the current directory...");
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println!("Try opening a file to trigger some events.");
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println!();
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// Wait for events in a loop and print them on the screen.
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loop {
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for event in unsafe { inotify.read_with_mut(read_op).await? } {
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println!("{:?}", event);
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}
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}
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})
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}
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#[cfg(not(target_os = "linux"))]
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fn main() {
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println!("This example works only on Linux!");
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}
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