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
|
# -*- coding: utf-8 -*-
import struct
import os
import atexit
from time import time as now
from threading import Thread
from glob import glob
try:
from queue import Queue
except ImportError:
from Queue import Queue
event_bin_format = 'llHHI'
# Taken from include/linux/input.h
# https://www.kernel.org/doc/Documentation/input/event-codes.txt
EV_SYN = 0x00
EV_KEY = 0x01
EV_REL = 0x02
EV_ABS = 0x03
EV_MSC = 0x04
def make_uinput():
if not os.path.exists('/dev/uinput'):
raise IOError('No uinput module found.')
import fcntl, struct
# Requires uinput driver, but it's usually available.
uinput = open("/dev/uinput", 'wb')
UI_SET_EVBIT = 0x40045564
fcntl.ioctl(uinput, UI_SET_EVBIT, EV_KEY)
UI_SET_KEYBIT = 0x40045565
for i in range(256):
fcntl.ioctl(uinput, UI_SET_KEYBIT, i)
BUS_USB = 0x03
uinput_user_dev = "80sHHHHi64i64i64i64i"
axis = [0] * 64 * 4
uinput.write(struct.pack(uinput_user_dev, b"Virtual Keyboard", BUS_USB, 1, 1, 1, 0, *axis))
uinput.flush() # Without this you may get Errno 22: Invalid argument.
UI_DEV_CREATE = 0x5501
fcntl.ioctl(uinput, UI_DEV_CREATE)
UI_DEV_DESTROY = 0x5502
#fcntl.ioctl(uinput, UI_DEV_DESTROY)
return uinput
class EventDevice(object):
def __init__(self, path):
self.path = path
self._input_file = None
self._output_file = None
@property
def input_file(self):
if self._input_file is None:
try:
self._input_file = open(self.path, 'rb')
except IOError as e:
if e.strerror == 'Permission denied':
print('Permission denied ({}). You must be sudo to access global events.'.format(self.path))
exit()
def try_close():
try:
self._input_file.close
except:
pass
atexit.register(try_close)
return self._input_file
@property
def output_file(self):
if self._output_file is None:
self._output_file = open(self.path, 'wb')
atexit.register(self._output_file.close)
return self._output_file
def read_event(self):
data = self.input_file.read(struct.calcsize(event_bin_format))
seconds, microseconds, type, code, value = struct.unpack(event_bin_format, data)
return seconds + microseconds / 1e6, type, code, value, self.path
def write_event(self, type, code, value):
integer, fraction = divmod(now(), 1)
seconds = int(integer)
microseconds = int(fraction * 1e6)
data_event = struct.pack(event_bin_format, seconds, microseconds, type, code, value)
# Send a sync event to ensure other programs update.
sync_event = struct.pack(event_bin_format, seconds, microseconds, EV_SYN, 0, 0)
self.output_file.write(data_event + sync_event)
self.output_file.flush()
class AggregatedEventDevice(object):
def __init__(self, devices, output=None):
self.event_queue = Queue()
self.devices = devices
self.output = output or self.devices[0]
def start_reading(device):
while True:
self.event_queue.put(device.read_event())
for device in self.devices:
thread = Thread(target=start_reading, args=[device])
thread.setDaemon(True)
thread.start()
def read_event(self):
return self.event_queue.get(block=True)
def write_event(self, type, code, value):
self.output.write_event(type, code, value)
import re
from collections import namedtuple
DeviceDescription = namedtuple('DeviceDescription', 'event_file is_mouse is_keyboard')
device_pattern = r"""N: Name="([^"]+?)".+?H: Handlers=([^\n]+)"""
def list_devices_from_proc(type_name):
try:
with open('/proc/bus/input/devices') as f:
description = f.read()
except FileNotFoundError:
return
devices = {}
for name, handlers in re.findall(device_pattern, description, re.DOTALL):
path = '/dev/input/event' + re.search(r'event(\d+)', handlers).group(1)
if type_name in handlers:
yield EventDevice(path)
def list_devices_from_by_id(name_suffix, by_id=True):
for path in glob('/dev/input/{}/*-event-{}'.format('by-id' if by_id else 'by-path', name_suffix)):
yield EventDevice(path)
def aggregate_devices(type_name):
# Some systems have multiple keyboards with different range of allowed keys
# on each one, like a notebook with a "keyboard" device exclusive for the
# power button. Instead of figuring out which keyboard allows which key to
# send events, we create a fake device and send all events through there.
try:
uinput = make_uinput()
fake_device = EventDevice('uinput Fake Device')
fake_device._input_file = uinput
fake_device._output_file = uinput
except IOError as e:
import warnings
warnings.warn('Failed to create a device file using `uinput` module. Sending of events may be limited or unavailable depending on plugged-in devices.', stacklevel=2)
fake_device = None
# We don't aggregate devices from different sources to avoid
# duplicates.
devices_from_proc = list(list_devices_from_proc(type_name))
if devices_from_proc:
return AggregatedEventDevice(devices_from_proc, output=fake_device)
# breaks on mouse for virtualbox
# was getting /dev/input/by-id/usb-VirtualBox_USB_Tablet-event-mouse
devices_from_by_id = list(list_devices_from_by_id(type_name)) or list(list_devices_from_by_id(type_name, by_id=False))
if devices_from_by_id:
return AggregatedEventDevice(devices_from_by_id, output=fake_device)
# If no keyboards were found we can only use the fake device to send keys.
assert fake_device
return fake_device
def ensure_root():
if os.geteuid() != 0:
raise ImportError('You must be root to use this library on linux.')
|
