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# encoding: utf-8
'''
Usage: evtest [options] [<device>, ...]
Input device enumerator and event monitor.
Running evtest without any arguments will let you select
from a list of all readable input devices.
Options:
-h, --help Show this help message and exit.
-c, --capabilities List device capabilities and exit.
-g, --grab Other applications will not receive events from
the selected devices while evtest is running.
Examples:
evtest /dev/input/event0 /dev/input/event1
'''
from __future__ import print_function
import re
import sys
import select
import atexit
import termios
import optparse
try:
input = raw_input
except NameError:
pass
from evdev import ecodes, list_devices, AbsInfo, InputDevice
def parseopt():
parser = optparse.OptionParser(add_help_option=False)
parser.add_option('-h', '--help', action='store_true')
parser.add_option('-g', '--grab', action='store_true')
parser.add_option('-c', '--capabilities', action='store_true')
return parser.parse_args()
def main():
opts, devices = parseopt()
if opts.help:
print(__doc__.strip())
return 0
if not devices:
devices = select_devices()
else:
devices = [InputDevice(path) for path in devices]
if opts.capabilities:
for device in devices:
print_capabilities(device)
return 0
if opts.grab:
for device in devices:
device.grab()
# Disable tty echoing if stdin is a tty.
if sys.stdin.isatty():
toggle_tty_echo(sys.stdin, enable=False)
atexit.register(toggle_tty_echo, sys.stdin, enable=False)
print('Listening for events (press ctrl-c to exit) ...')
fd_to_device = {dev.fd: dev for dev in devices}
while True:
r, w, e = select.select(fd_to_device, [], [])
for fd in r:
for event in fd_to_device[fd].read():
print_event(event)
def select_devices(device_dir='/dev/input'):
'''
Select one or more devices from a list of accessible input devices.
'''
def devicenum(device_path):
digits = re.findall(r'\d+$', device_path)
return [int(i) for i in digits]
devices = sorted(list_devices(device_dir), key=devicenum)
devices = [InputDevice(path) for path in devices]
if not devices:
msg = 'error: no input devices found (do you have rw permission on %s/*?)'
print(msg % device_dir, file=sys.stderr)
sys.exit(1)
dev_format = '{0:<3} {1.path:<20} {1.name:<35} {1.phys:<35} {1.uniq:<4}'
dev_lines = [dev_format.format(num, dev) for num, dev in enumerate(devices)]
print('ID {:<20} {:<35} {:<35} {}'.format('Device', 'Name', 'Phys', 'Uniq'))
print('-' * len(max(dev_lines, key=len)))
print('\n'.join(dev_lines))
print()
choices = input('Select devices [0-%s]: ' % (len(dev_lines) - 1))
try:
choices = choices.split()
choices = [devices[int(num)] for num in choices]
except ValueError:
choices = None
if not choices:
msg = 'error: invalid input - please enter one or more numbers separated by spaces'
print(msg, file=sys.stderr)
sys.exit(1)
return choices
def print_capabilities(device):
capabilities = device.capabilities(verbose=True)
input_props = device.input_props(verbose=True)
print('Device name: {.name}'.format(device))
print('Device info: {.info}'.format(device))
print('Repeat settings: {}\n'.format(device.repeat))
if ('EV_LED', ecodes.EV_LED) in capabilities:
leds = ','.join(i[0] for i in device.leds(True))
print('Active LEDs: %s' % leds)
active_keys = ','.join(k[0] for k in device.active_keys(True))
print('Active keys: %s\n' % active_keys)
if input_props:
print('Input properties:')
for type, code in input_props:
print(' %s %s' % (type, code))
print()
print('Device capabilities:')
for type, codes in capabilities.items():
print(' Type {} {}:'.format(*type))
for code in codes:
# code <- ('BTN_RIGHT', 273) or (['BTN_LEFT', 'BTN_MOUSE'], 272)
if isinstance(code[1], AbsInfo):
print(' Code {:<4} {}:'.format(*code[0]))
print(' {}'.format(code[1]))
else:
# Multiple names may resolve to one value.
s = ', '.join(code[0]) if isinstance(code[0], list) else code[0]
print(' Code {:<4} {}'.format(s, code[1]))
print('')
def print_event(e):
if e.type == ecodes.EV_SYN:
if e.code == ecodes.SYN_MT_REPORT:
msg = 'time {:<16} +++++++++ {} ++++++++'
else:
msg = 'time {:<16} --------- {} --------'
print(msg.format(e.timestamp(), ecodes.SYN[e.code]))
else:
if e.type in ecodes.bytype:
codename = ecodes.bytype[e.type][e.code]
else:
codename = '?'
evfmt = 'time {:<16} type {} ({}), code {:<4} ({}), value {}'
print(evfmt.format(e.timestamp(), e.type, ecodes.EV[e.type], e.code, codename, e.value))
def toggle_tty_echo(fh, enable=True):
flags = termios.tcgetattr(fh.fileno())
if enable:
flags[3] |= termios.ECHO
else:
flags[3] &= ~termios.ECHO
termios.tcsetattr(fh.fileno(), termios.TCSANOW, flags)
if __name__ == '__main__':
try:
ret = main()
except (KeyboardInterrupt, EOFError):
ret = 0
sys.exit(ret)
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