listenfd

https://docs.rs/listenfd/1.0.2/

Admin

listenfd is a Rust library for working with externally managed file descriptors passed from systemd...

Tokens:297

Snippets:4

Trust Score:9.1

Update:6 months ago

Show doc for...

Tokens:

Raw

### Systemd/Systemfd Integration Example

Source: https://docs.rs/crate/listenfd

Illustrates the command-line usage for integrating systemfd and cargo-watch with a Rust application using listenfd. This setup allows systemfd to manage sockets and cargo-watch to recompile the application on changes.

```bash
$ cargo install systemfd cargo-watch
systemfd --no-pid -s http::3000 -- cargo watch -x run

```

--------------------------------

### Initialize ListenFd and Use Provided Listener

Source: https://docs.rs/crate/listenfd

Demonstrates how to initialize ListenFd from environment variables and conditionally use a provided TCP listener or fall back to local binding. Requires the `listenfd` crate.

```rust
use listenfd::ListenFd;

let mut listenfd = ListenFd::from_env();
let mut server = make_a_server();

// if we are given a tcp listener on listen fd 0, we use that one
server = if let Some(listener) = listenfd.take_tcp_listener(0)? {
    server.listen(listener)
// otherwise fall back to local listening
} else {
    server.bind("127.0.0.1:3000")?
};

```

Tokens:

Raw