128 lines
3.5 KiB
Python
Executable File
128 lines
3.5 KiB
Python
Executable File
#!/usr/bin/python3
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import shutil
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import re
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import threading
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from subprocess import Popen, run, DEVNULL, PIPE
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USBGUARD_EXEC_NAME = shutil.which("usbguard")
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DUNSTIFY_EXEC_NAME = shutil.which("dunstify")
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open_notifications = {}
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def parse_event_type_and_id(stream):
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line = stream.readline()
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if not line.startswith("[device] "):
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return None
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event_type = re.findall("(?<=\\[device\\] )[a-zA-Z]+", line)
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if len(event_type) == 0:
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return None
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event_id = re.findall("(?<=id=)[0-9]+", line)
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if len(event_id) == 0:
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return None
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return event_type[0], int(event_id[0])
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def parse_event_properties(stream, count):
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props = {}
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for _ in range(count):
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line = stream.readline()
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try:
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sep_ind = line.index("=")
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prop_name = line[1:sep_ind]
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props[prop_name] = line[sep_ind + 1 : -1]
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if prop_name == "device_rule":
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break
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except ValueError:
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continue
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return props
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def get_name_and_id_from_rule(rule):
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name = re.findall('(?<=name ")[^"]+(?=")', rule)
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if len(name) == 0:
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name = ""
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else:
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name = name[0]
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id = re.findall("(?<=id )[a-z0-9]{4}:[a-z0-9]{4}", rule)
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if len(id) == 0:
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id = ""
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else:
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id = id[0]
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return name, id
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def prompt_device_action(dev_id, name, long_id):
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proc = Popen(
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[
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DUNSTIFY_EXEC_NAME,
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"-p",
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"-A",
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"block,Block",
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"-A",
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"allow,Allow",
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"-A",
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"reject,Reject",
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f"{name} ({long_id})",
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"New Device",
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],
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stdout=PIPE,
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text=True,
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bufsize=0,
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)
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open_notifications[dev_id] = int(proc.stdout.readline())
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option = proc.communicate()[0][:-1]
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try:
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open_notifications.pop(dev_id)
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except KeyError:
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pass
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match option:
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case "reject":
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run([USBGUARD_EXEC_NAME, "reject-device", long_id])
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case "allow":
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run([USBGUARD_EXEC_NAME, "allow-device", long_id])
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case _:
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run([USBGUARD_EXEC_NAME, "block-device", long_id])
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def close_notification(dev_id):
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if dev_id in open_notifications:
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notif_id = open_notifications.pop(dev_id)
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run([DUNSTIFY_EXEC_NAME, "-C", str(notif_id)])
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with Popen(
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[USBGUARD_EXEC_NAME, "watch"],
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stdin=DEVNULL,
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stdout=PIPE,
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text=True,
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bufsize=0,
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) as usbguard_proc:
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new_devices = set()
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usbguard_proc.stdout.readline() # get rid of initial connection message
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while True:
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event_type_result = parse_event_type_and_id(usbguard_proc.stdout)
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if event_type_result is None:
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continue
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event_type, dev_id = event_type_result
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if event_type not in ["PresenceChanged", "PolicyApplied"]:
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continue
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props = parse_event_properties(usbguard_proc.stdout, 3)
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name, long_id = get_name_and_id_from_rule(props["device_rule"])
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match event_type:
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case "PresenceChanged":
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if props["event"] == "Insert":
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new_devices.add(dev_id)
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else:
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close_notification(dev_id)
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new_devices.discard(dev_id)
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case "PolicyApplied":
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if props["target_new"] == "block":
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threading.Thread(
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target=prompt_device_action,
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args=(dev_id, name, long_id),
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).start()
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new_devices.discard(dev_id)
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