Reload TLS config on SIGHUP

src/main.rs

@@ -44,6 +44,7 @@ fn version() -> String {
 #[derive(Debug, Clone, Copy)]
 enum ApplicationState {
     Ready,
+    Reloading,
     Stopping,
 }
 
@@ -61,6 +62,21 @@ fn set_application_state(state: ApplicationState) {
 
         match state {
             ApplicationState::Ready => notify(&[NotifyState::Ready]),
+            ApplicationState::Reloading => {
+                let timespec = nix::time::clock_gettime(
+                    nix::time::ClockId::CLOCK_MONOTONIC,
+                )
+                .expect("CLOCK_MONOTONIC should be usable");
+                let monotonic_usec =
+                    timespec.tv_sec() * 1_000_000 + timespec.tv_nsec() / 1000;
+
+                notify(&[
+                    NotifyState::Reloading,
+                    NotifyState::Custom(&format!(
+                        "MONOTONIC_USEC={monotonic_usec}",
+                    )),
+                ]);
+            }
             ApplicationState::Stopping => notify(&[NotifyState::Stopping]),
         };
     }