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#[macro_use]
extern crate log;
extern crate systemd;
#[macro_use]
extern crate lazy_static;
use std::collections::HashMap;
use std::thread;
use std::time::Duration;
lazy_static! {
static ref WATCHDOG_NOTIFICATION_HASHMAP: HashMap<&'static str, &'static str> = {
let mut m = HashMap::new();
m.insert(systemd::daemon::STATE_WATCHDOG, "1");
m
};
}
pub fn expected_timeout() -> Result<Duration, systemd::Error> {
systemd::daemon::watchdog_enabled(false).map(Duration::from_micros)
}
pub fn recommended_timeout() -> Result<Duration, systemd::Error> {
Ok(expected_timeout()? / 2)
}
pub fn ping_watchdog() -> Result<bool, systemd::Error> {
systemd::daemon::notify(false, WATCHDOG_NOTIFICATION_HASHMAP.to_owned())
}
pub fn start_watchdog_thread(duration: Duration) -> thread::JoinHandle<()> {
thread::spawn(move || loop {
thread::sleep(duration);
if let Err(e) = ping_watchdog() {
warn!("Could not ping systemd's watchdog: {:?}", e);
} else {
debug!("Pinged systemd's watchdog.");
}
})
}