10_environment/
10_environment.rs

1use localauthentication::prelude::*;
2use std::sync::{
3    atomic::{AtomicUsize, Ordering},
4    Arc,
5};
6
7fn main() -> Result<(), Box<dyn std::error::Error>> {
8    let environment = match LAEnvironment::current_user() {
9        Ok(environment) => environment,
10        Err(error) => {
11            println!("environment APIs require macOS 15+: {error}");
12            return Ok(());
13        }
14    };
15
16    let notifications = Arc::new(AtomicUsize::new(0));
17    let registration = environment.add_observer({
18        let notifications = Arc::clone(&notifications);
19        move |environment: &LAEnvironment, old_state: &LAEnvironmentState| {
20            let current_count = environment
21                .state()
22                .and_then(|state| state.all_mechanisms().map(|items| items.len()))
23                .unwrap_or_default();
24            let previous_count = old_state
25                .all_mechanisms()
26                .map(|items| items.len())
27                .unwrap_or_default();
28            println!(
29                "environment changed: {previous_count} -> {current_count} mechanisms"
30            );
31            notifications.fetch_add(1, Ordering::Relaxed);
32        }
33    })?;
34
35    let state = environment.state()?;
36    println!("all mechanisms: {}", state.all_mechanisms()?.len());
37
38    if let Some(biometry) = state.biometry()? {
39        println!(
40            "biometry: {:?}, enrolled={}, usable={}, icon={}",
41            biometry.biometry_type()?,
42            biometry.is_enrolled()?,
43            biometry.is_usable()?,
44            biometry.icon_system_name()?
45        );
46    }
47
48    if let Some(user_password) = state.user_password()? {
49        println!(
50            "user password: set={}, usable={}, label={}",
51            user_password.is_set()?,
52            user_password.is_usable()?,
53            user_password.localized_name()?
54        );
55    }
56
57    for companion in state.companions()? {
58        println!(
59            "companion {:?}: usable={}, state-hash-bytes={}",
60            companion.companion_type()?,
61            companion.is_usable()?,
62            companion.state_hash()?.map_or(0, |hash| hash.len())
63        );
64    }
65
66    environment.remove_observer(&registration)?;
67    println!(
68        "observer notifications seen so far: {}",
69        notifications.load(Ordering::Relaxed)
70    );
71    println!("✅ environment smoke OK");
72    Ok(())
73}
10_environment/10_environment.rs

10_environment/
10_environment.rs
