Repository navigation
Expand file tree
/
Copy pathuinput.py
More file actions
286 lines (221 loc) · 9.19 KB
/
Copy pathuinput.py
File metadata and controls
286 lines (221 loc) · 9.19 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
# encoding: utf-8
import os
import stat
import time
from collections import defaultdict
from evdev import _uinput
from evdev import ecodes, util, device
from evdev.events import InputEvent
import evdev.ff as ff
import ctypes
try:
from evdev.eventio_async import EventIO
except ImportError:
from evdev.eventio import EventIO
class UInputError(Exception):
pass
class UInput(EventIO):
'''
A userland input device and that can inject input events into the
linux input subsystem.
'''
__slots__ = (
'name', 'vendor', 'product', 'version', 'bustype',
'events', 'devnode', 'fd', 'device',
)
@classmethod
def from_device(cls, *devices, filtered_types=(ecodes.EV_SYN, ecodes.EV_FF), **kwargs):
'''
Create an UInput device with the capabilities of one or more input
devices.
Arguments
---------
devices : InputDevice|str
Varargs of InputDevice instances or paths to input devices.
filtered_types : Tuple[event type codes]
Event types to exclude from the capabilities of the uinput device.
**kwargs
Keyword arguments to UInput constructor (i.e. name, vendor etc.).
'''
device_instances = []
for dev in devices:
if not isinstance(dev, device.InputDevice):
dev = device.InputDevice(str(dev))
device_instances.append(dev)
all_capabilities = defaultdict(set)
# Merge the capabilities of all devices into one dictionary.
for dev in device_instances:
for ev_type, ev_codes in dev.capabilities().items():
all_capabilities[ev_type].update(ev_codes)
for evtype in filtered_types:
if evtype in all_capabilities:
del all_capabilities[evtype]
return cls(events=all_capabilities, **kwargs)
def __init__(self,
events=None,
name='py-evdev-uinput',
vendor=0x1, product=0x1, version=0x1, bustype=0x3,
devnode='/dev/uinput', phys='py-evdev-uinput', input_props=None):
'''
Arguments
---------
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.
name
The name of the input device.
vendor
Vendor identifier.
product
Product identifier.
version
Version identifier.
bustype
Bustype identifier.
phys
Physical path.
input_props
Input properties and quirks.
Note
----
If you do not specify any events, the uinput device will be able
to inject only ``KEY_*`` and ``BTN_*`` event codes.
'''
self.name = name #: Uinput device name.
self.vendor = vendor #: Device vendor identifier.
self.product = product #: Device product identifier.
self.version = version #: Device version identifier.
self.bustype = bustype #: Device bustype - e.g. ``BUS_USB``.
self.phys = phys #: Uinput device physical path.
self.devnode = devnode #: Uinput device node - e.g. ``/dev/uinput/``.
if not events:
events = {ecodes.EV_KEY: ecodes.keys.keys()}
self._verify()
#: Write-only, non-blocking file descriptor to the uinput device node.
self.fd = _uinput.open(devnode)
# Prepare the list of events for passing to _uinput.enable and _uinput.setup.
absinfo, prepared_events = self._prepare_events(events)
# Set properties
input_props = input_props or []
for prop in input_props:
_uinput.set_prop(self.fd, prop)
for etype, code in prepared_events:
_uinput.enable(self.fd, etype, code)
print('setup device')
_uinput.setup(self.fd, name, vendor, product, version, bustype, absinfo)
print('create device')
# Create the uinput device.
_uinput.create(self.fd)
# Set phys name
_uinput.set_phys(self.fd, phys)
self.dll = ctypes.CDLL(_uinput.__file__)
self.dll._uinput_begin_upload.restype = ctypes.c_int
self.dll._uinput_end_upload.restype = ctypes.c_int
#: An :class:`InputDevice <evdev.device.InputDevice>` instance
#: for the fake input device. ``None`` if the device cannot be
#: opened for reading and writing.
self.device = self._find_device()
def _prepare_events(self, events):
'''Prepare events for passing to _uinput.enable and _uinput.setup'''
absinfo, prepared_events = [], []
for etype, codes in events.items():
for code in codes:
# Handle max, min, fuzz, flat.
if isinstance(code, (tuple, list, device.AbsInfo)):
# Flatten (ABS_Y, (0, 255, 0, 0, 0, 0)) to (ABS_Y, 0, 255, 0, 0, 0, 0).
f = [code[0]]
f.extend(code[1])
# Ensure the tuple is always 6 ints long, since uinput.c:uinput_create
# does little in the way of checking the length.
f.extend([0] * (6 - len(code[1])))
absinfo.append(f)
code = code[0]
prepared_events.append((etype, code))
return absinfo, prepared_events
def __enter__(self):
return self
def __exit__(self, type, value, tb):
if hasattr(self, 'fd'):
self.close()
def __repr__(self):
# TODO:
v = (repr(getattr(self, i)) for i in
('name', 'bustype', 'vendor', 'product', 'version', 'phys'))
return '{}({})'.format(self.__class__.__name__, ', '.join(v))
def __str__(self):
msg = ('name "{}", bus "{}", vendor "{:04x}", product "{:04x}", version "{:04x}", phys "{}"\n'
'event types: {}')
evtypes = [i[0] for i in self.capabilities(True).keys()]
msg = msg.format(self.name, ecodes.BUS[self.bustype],
self.vendor, self.product,
self.version, self.phys, ' '.join(evtypes))
return msg
def close(self):
# Close the associated InputDevice, if it was previously opened.
if self.device is not None:
self.device.close()
# Destroy the uinput device.
if self.fd > -1:
_uinput.close(self.fd)
self.fd = -1
def syn(self):
'''
Inject a ``SYN_REPORT`` event into the input subsystem. Events
queued by :func:`write()` will be fired. If possible, events
will be merged into an 'atomic' event.
'''
_uinput.write(self.fd, ecodes.EV_SYN, ecodes.SYN_REPORT, 0)
def capabilities(self, verbose=False, absinfo=True):
'''See :func:`capabilities <evdev.device.InputDevice.capabilities>`.'''
if self.device is None:
raise UInputError('input device not opened - cannot read capabilities')
return self.device.capabilities(verbose, absinfo)
def begin_upload(self, effect_id):
upload = ff.UInputUpload()
upload.effect_id = effect_id
ret = self.dll._uinput_begin_upload(self.fd, ctypes.byref(upload))
if ret:
raise UInputError('Failed to begin uinput upload: ' + os.strerror(ret))
return upload
def end_upload(self, upload):
ret = self.dll._uinput_end_upload(self.fd, ctypes.byref(upload))
if ret:
raise UInputError('Failed to end uinput upload: ' + os.strerror(ret))
def begin_erase(self, effect_id):
erase = ff.UInputErase()
erase.effect_id = effect_id
ret = self.dll._uinput_begin_erase(self.fd, ctypes.byref(erase))
if ret:
raise UInputError('Failed to begin uinput erase: ' + os.strerror(ret))
return erase
def end_erase(self, erase):
ret = self.dll._uinput_end_erase(self.fd, ctypes.byref(erase))
if ret:
raise UInputError('Failed to end uinput erase: ' + os.strerror(ret))
def _verify(self):
'''
Verify that an uinput device exists and is readable and writable
by the current process.
'''
try:
m = os.stat(self.devnode)[stat.ST_MODE]
if not stat.S_ISCHR(m):
raise
except (IndexError, OSError):
msg = '"{}" does not exist or is not a character device file '\
'- verify that the uinput module is loaded'
raise UInputError(msg.format(self.devnode))
if not os.access(self.devnode, os.W_OK):
msg = '"{}" cannot be opened for writing'
raise UInputError(msg.format(self.devnode))
if len(self.name) > _uinput.maxnamelen:
msg = 'uinput device name must not be longer than {} characters'
raise UInputError(msg.format(_uinput.maxnamelen))
def _find_device(self):
#:bug: the device node might not be immediately available
time.sleep(0.1)
for path in util.list_devices('/dev/input/'):
d = device.InputDevice(path)
if d.name == self.name:
return d