sh/slock-usb-key - Recently Written

slock-usb-key (863 bytes)
1 #!/usr/bin/env python3
2 # Lock the screen with slock when a USB key is unplugged; unlock when replugged.
3 # Usage: put the key's ID_SERIAL in ~/.slock-usb-key; allow NOPASSWD sudo killall.
4 
5 
6 from os.path import expanduser
7 from subprocess import Popen
8 
9 import signal
10 import pyudev
11 
12 
13 signal.signal(signal.SIGCHLD, signal.SIG_IGN)
14 
15 try:
16     with open(expanduser('~/.slock-usb-key'), 'r') as fp:
17         serial = fp.read().strip()
18 except OSError as e:
19     raise SystemExit(f'slock-usb-key: {e}: put the key ID_SERIAL there')
20 
21 context = pyudev.Context()
22 monitor = pyudev.Monitor.from_netlink(context)
23 monitor.filter_by('block', 'disk')
24 for device in iter(monitor.poll, None):
25     if device.get('ID_SERIAL') == serial:
26         if device.action == 'add':
27             Popen(['sudo', 'killall', 'slock'])
28         elif device.action == 'remove':
29             Popen(['slock'])