Codify dialog exit statuses and make them less error-prone

util/src/lib.rs

@@ -6,6 +6,22 @@ pub mod settings;
 
 pub const BSCREENSAVER_WM_CLASS: &[u8] = b"bscreensaver\0Bscreensaver\0";
 
+#[repr(i32)]
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum DialogExitStatus {
+    AuthFailed = -1,
+    AuthSucceeded = 0,
+    AuthCanceled = 1,
+    AuthTimedOut = 2,
+    OtherError = 3,
+}
+
+impl DialogExitStatus {
+    pub fn exit(&self) -> ! {
+        std::process::exit(*self as i32);
+    }
+}
+
 pub fn init_logging(env_name: &str) {
     env_logger::builder()
         .format_timestamp_millis()