Update to udev 0.4

Cargo.toml

@@ -28,8 +28,8 @@ winit = { version = "0.22.0", optional = true }
 drm = { version = "^0.4.0", git = "https://github.com/drakulix/drm-rs", branch = "develop", optional = true }
 gbm = { version = "^0.6.0", git = "https://github.com/drakulix/gbm.rs", branch = "develop", optional = true, default-features = false, features = ["drm-support"] }
 glium = { version = "0.23.0", optional = true, default-features = false }
-input = { version = "0.4.1", optional = true }
+input = { version = "0.5", default-features = false, optional = true }
-udev = { version = "0.2.0", optional = true }
+udev = { version = "0.4", optional = true }
 dbus = { version = "0.8", optional = true }
 systemd = { version = "0.4.0", optional = true }
 wayland-protocols = { version = "0.25.0", features = ["unstable_protocols", "server"], optional = true }
@@ -37,7 +37,7 @@ image = { version = "0.21.0", optional = true }
 lazy_static = "1.0.0"
 thiserror = "1"
 # TODO: remove as soon as drm-rs provides an error implementing Error
-failure = "0.1"
+failure = { version = "0.1", optional = true }
 
 [dev-dependencies]
 slog-term = "2.3"
@@ -47,8 +47,8 @@ gl_generator = { version = "0.10", optional = true }
 
 [features]
 default = ["backend_winit", "backend_drm_legacy", "backend_drm_gbm", "backend_drm_egl", "backend_libinput", "backend_udev", "backend_session_logind", "renderer_glium", "xwayland", "wayland_frontend"]
-backend_winit = ["winit", "wayland-server/dlopen", "wayland-client/dlopen", "wayland-egl", "backend_egl", "renderer_gl", "use_system_lib"]
+backend_winit = ["winit", "wayland-server/dlopen", "wayland-client/dlopen", "backend_egl", "wayland-egl", "renderer_gl", "use_system_lib"]
-backend_drm = ["drm"]
+backend_drm = ["drm", "failure"]
 backend_drm_legacy = ["backend_drm"]
 backend_drm_gbm = ["backend_drm", "gbm", "image"]
 backend_drm_egl = ["backend_drm", "backend_egl"]

anvil/Cargo.toml

@@ -15,6 +15,7 @@ glium = { version = "0.23.0", default-features = false }
 wayland-server = "0.25.0"
 xkbcommon = "0.4.0"
 bitflags = "1.2.1"
+input = { version = "0.5.0", features = ["udev"], optional = true }
 
 [dependencies.smithay]
 path = ".."
@@ -28,5 +29,5 @@ gl_generator = "0.10"
 default = [ "winit", "egl", "udev", "logind" ]
 egl = [ "smithay/use_system_lib" ]
 winit = [ "smithay/backend_winit" ]
-udev = [ "smithay/backend_libinput", "smithay/backend_drm_legacy", "smithay/backend_drm_gbm", "smithay/backend_drm_egl", "smithay/backend_udev", "smithay/backend_session" ]
+udev = [ "smithay/backend_libinput", "smithay/backend_udev", "smithay/backend_drm_legacy", "smithay/backend_drm_gbm", "smithay/backend_drm_egl", "smithay/backend_session", "input" ]
 logind = [ "smithay/backend_session_logind" ]

anvil/src/udev.rs

@@ -118,14 +118,12 @@ pub fn run_udev(mut display: Display, mut event_loop: EventLoop<AnvilState>, log
     /*
      * Initialize the udev backend
      */
-    let context = ::smithay::reexports::udev::Context::new().map_err(|_| ())?;
     let seat = session.seat();
 
-    let primary_gpu = primary_gpu(&context, &seat).unwrap_or_default();
+    let primary_gpu = primary_gpu(&seat).unwrap_or_default();
 
     let bytes = include_bytes!("../resources/cursor2.rgba");
     let udev_backend = UdevBackend::new(
-        &context,
         UdevHandlerImpl {
             compositor_token,
             #[cfg(feature = "egl")]
@@ -223,7 +221,7 @@ pub fn run_udev(mut display: Display, mut event_loop: EventLoop<AnvilState>, log
      * Initialize libinput backend
      */
     let mut libinput_context =
-        Libinput::new_from_udev::<LibinputSessionInterface<AutoSession>>(session.clone().into(), &context);
+        Libinput::new_with_udev::<LibinputSessionInterface<AutoSession>>(session.clone().into());
     let libinput_session_id = notifier.register(libinput_context.observer());
     libinput_context.udev_assign_seat(&seat).unwrap();
     let mut libinput_backend = LibinputInputBackend::new(libinput_context, log.clone());

src/backend/session/direct.rs

@@ -66,7 +66,7 @@ use std::{
     },
 };
 #[cfg(feature = "backend_udev")]
-use udev::Context;
+use udev::Device as UdevDevice;
 
 #[allow(dead_code)]
 mod tty {
@@ -126,12 +126,7 @@ fn is_tty_device(dev: dev_t, _path: Option<&Path>) -> bool {
 fn is_tty_device(dev: dev_t, path: Option<&Path>) -> bool {
     match path {
         Some(path) => {
-            let udev = match Context::new() {
+            let device = match UdevDevice::from_syspath(path) {
-                Ok(context) => context,
-                Err(_) => return major(dev) == TTY_MAJOR || minor(dev) != 0,
-            };
-
-            let device = match udev.device_from_syspath(path) {
                 Ok(device) => device,
                 Err(_) => return major(dev) == TTY_MAJOR || minor(dev) != 0,
             };

src/backend/udev.rs

@@ -13,10 +13,11 @@ use nix::sys::stat::{dev_t, stat};
 use std::{
     collections::HashSet,
     ffi::OsString,
+    io::Result as IoResult,
     os::unix::io::{AsRawFd, RawFd},
     path::{Path, PathBuf},
 };
-use udev::{Context, Enumerator, EventType, MonitorBuilder, MonitorSocket, Result as UdevResult};
+use udev::{Enumerator, EventType, MonitorBuilder, MonitorSocket};
 
 use calloop::{
     generic::{Generic, SourceFd},
@@ -46,22 +47,16 @@ impl<T: UdevHandler + 'static> UdevBackend<T> {
     /// Creates a new [`UdevBackend`]
     ///
     /// ## Arguments
-    /// `context` - An initialized udev context
     /// `handler` - User-provided handler to respond to any detected changes
     /// `seat`    -
     /// `logger`  - slog Logger to be used by the backend and its `DrmDevices`.
-    pub fn new<L, S: AsRef<str>>(
+    pub fn new<L, S: AsRef<str>>(mut handler: T, seat: S, logger: L) -> IoResult<UdevBackend<T>>
-        context: &Context,
-        mut handler: T,
-        seat: S,
-        logger: L,
-    ) -> UdevResult<UdevBackend<T>>
     where
         L: Into<Option<::slog::Logger>>,
     {
         let log = crate::slog_or_stdlog(logger).new(o!("smithay_module" => "backend_udev"));
 
-        let devices = all_gpus(context, seat)?
+        let devices = all_gpus(seat)?
             .into_iter()
             // Create devices
             .flat_map(|path| match stat(&path) {
@@ -76,9 +71,7 @@ impl<T: UdevHandler + 'static> UdevBackend<T> {
             })
             .collect();
 
-        let mut builder = MonitorBuilder::new(context)?;
+        let monitor = MonitorBuilder::new()?.match_subsystem("drm")?.listen()?;
-        builder.match_subsystem("drm")?;
-        let monitor = builder.listen()?;
 
         Ok(UdevBackend {
             devices,
@@ -173,8 +166,8 @@ pub trait UdevHandler {
 ///
 /// Might be used for filtering in [`UdevHandler::device_added`] or for manual
 /// [`LegacyDrmDevice`](::backend::drm::legacy::LegacyDrmDevice) initialization.
-pub fn primary_gpu<S: AsRef<str>>(context: &Context, seat: S) -> UdevResult<Option<PathBuf>> {
+pub fn primary_gpu<S: AsRef<str>>(seat: S) -> IoResult<Option<PathBuf>> {
-    let mut enumerator = Enumerator::new(context)?;
+    let mut enumerator = Enumerator::new()?;
     enumerator.match_subsystem("drm")?;
     enumerator.match_sysname("card[0-9]*")?;
 
@@ -204,8 +197,8 @@ pub fn primary_gpu<S: AsRef<str>>(context: &Context, seat: S) -> UdevResult<Opti
 ///
 /// Might be used for manual  [`LegacyDrmDevice`](::backend::drm::legacy::LegacyDrmDevice)
 /// initialization.
-pub fn all_gpus<S: AsRef<str>>(context: &Context, seat: S) -> UdevResult<Vec<PathBuf>> {
+pub fn all_gpus<S: AsRef<str>>(seat: S) -> IoResult<Vec<PathBuf>> {
-    let mut enumerator = Enumerator::new(context)?;
+    let mut enumerator = Enumerator::new()?;
     enumerator.match_subsystem("drm")?;
     enumerator.match_sysname("card[0-9]*")?;
     Ok(enumerator