uinput: support event types without codes

docs/changelog.rst

@@ -1,6 +1,12 @@
 Changelog
 ---------
 
+Unreleased
+==========
+
+- Allow ``UInput`` event types without event codes, such as ``EV_REP``.
+
+
 1.9.3 (Feb 05, 2025)
 ====================
 

src/evdev/uinput.c

@@ -298,6 +298,25 @@ uinput_write(PyObject *self, PyObject *args)
 }
 
 
+static PyObject *
+uinput_enable_event_type(PyObject *self, PyObject *args)
+{
+    int fd;
+    uint16_t type;
+
+    int ret = PyArg_ParseTuple(args, "ih", &fd, &type);
+    if (!ret) return NULL;
+
+    if (ioctl(fd, UI_SET_EVBIT, type) < 0) {
+        _uinput_close(fd);
+        PyErr_SetFromErrno(PyExc_OSError);
+        return NULL;
+    }
+
+    Py_RETURN_NONE;
+}
+
+
 static PyObject *
 uinput_enable_event(PyObject *self, PyObject *args)
 {
@@ -376,6 +395,9 @@ static PyMethodDef MethodTable[] = {
     { "enable", uinput_enable_event, METH_VARARGS,
       "Enable a type of event."},
 
+    { "enable_type", uinput_enable_event_type, METH_VARARGS,
+      "Enable an event type without enabling an event code."},
+
     { "set_phys", uinput_set_phys, METH_VARARGS,
       "Set physical path"},
 

src/evdev/uinput.py

@@ -106,7 +106,9 @@ def __init__(
         events : dict
           Dictionary of event types mapping to lists of event codes. The
           event types and codes that the uinput device will be able to
-          inject - defaults to all key codes.
+          inject - defaults to all key codes. An event type mapped to an
+          empty sequence enables the event type without enabling any event
+          codes, which is useful for types such as ``EV_REP``.
 
         name
           The name of the input device.
@@ -165,6 +167,10 @@ def __init__(
         for prop in input_props:
             _uinput.set_prop(self.fd, prop)
 
+        for etype, codes in events.items():
+            if not codes:
+                _uinput.enable_type(self.fd, etype)
+
         for etype, code in prepared_events:
             _uinput.enable(self.fd, etype, code)
 

tests/test_uinput.py

@@ -67,6 +67,16 @@ def test_enable_events(c):
         assert sorted(cap[e.EV_KEY]) == sorted(c["events"][e.EV_KEY])
 
 
+def test_enable_event_type_without_codes(c):
+    e = ecodes
+    c["events"] = {e.EV_KEY: [e.KEY_A], e.EV_REP: []}
+
+    with uinput.UInput(**c) as ui:
+        repeat = ui.device.repeat
+        assert repeat.delay > 0
+        assert repeat.repeat > 0
+
+
 def test_abs_values(c):
     e = ecodes
     c = {