add global var to indicate server shutdown requests

src/tools.rs

@@ -545,3 +545,15 @@ pub fn fd_change_cloexec(fd: RawFd, on: bool) -> Result<(), Error> {
     fcntl(fd, F_SETFD(flags))?;
     Ok(())
 }
+
+
+static mut SHUTDOWN_REQUESTED: bool = false;
+
+pub fn request_shutdown() {
+    unsafe { SHUTDOWN_REQUESTED = true; }
+}
+
+#[inline(always)]
+pub fn shutdown_requested() -> bool {
+    unsafe { SHUTDOWN_REQUESTED }
+}

src/tools/daemon.rs

@@ -200,7 +200,10 @@ where
     });
 
     Ok(service.select(signal_handler)
-        .map(|_| log::info!("daemon shutting down..."))
+       .map(|_| {
+           log::info!("daemon shutting down...");
+           crate::tools::request_shutdown();
+       })
        .map_err(|_| ())
     )
 }