Can tauri be used for writing greeter for greetd?

[zerodegress]

I found that there when I trying to run typical tauri app as greeter from greetd, the app always crashed with “Permission denied”.
Does tauri need some file system permissions? (After all, greedd is running as a “greeter” user with no home directory) or is there any additional configuration that needs to be done?

[FabianLars]

hmm, the only thing that needs the home dir is the cache and data storage but i would have expected it to not be required to at least start. Is there any writable path available? If so you could set https://docs.rs/tauri/latest/tauri/webview/struct.WebviewWindowBuilder.html#method.data_directory to that and see if it helps.

[zerodegress]

Thanks, my greeter works fine after adding the following code:

tauri::Builder::default()
    .setup(|app| {
      let main_window =
        WebviewWindowBuilder::new(app, "main", tauri::WebviewUrl::App("index.html".into()))
          .data_directory(PathBuf::from("/tmp/sometauricache"))
          .build()
          .expect("create main window failed");
      Ok(())
    })