Tokio: how to wait for multiple signals?

help
1

I want to wait for SIGINT and SIGTERM. Is there a simple way to wait for an arbitrary number of signals?

This is a repost of this question because it was never answered.

2

You can use tokio::select! to wait for various events.

use tokio::signal::unix::{signal, SignalKind};
tokio::select! {
    _ = signal(SignalKind::interrupt())?.recv() => println!("SIGINT"),
    _ = signal(SignalKind::terminate())?.recv() => println!("SIGTERM"),
}
println!("terminating the process...");
3

If you don't mind the dependency, there are crates for this. https://docs.rs/signal-hook/\*/signal_hook/ is one of them, and it comes with async adapters for various runtimes, for instance https://docs.rs/signal-hook-tokio/\*/signal_hook_tokio/.

4

tokio::signal is backed by the signal-hook-registry crate which is the backend of the signal-hook crate.

5

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