mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
143 lines
5.6 KiB
Python
143 lines
5.6 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main PiKVM daemon. #
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# #
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# Copyright (C) 2018-2022 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import os
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import asyncio
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from typing import Callable
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from typing import Any
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from ...logging import get_logger
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from ...inotify import InotifyMask
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from ...inotify import Inotify
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from ... import aiotools
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from ... import usb
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from ...yamlconf import Section
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from ...validators.basic import valid_stripped_string_not_empty
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from . import BaseUserGpioDriver
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# =====
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class Plugin(BaseUserGpioDriver):
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def __init__(
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self,
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instance_name: str,
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notifier: aiotools.AioNotifier,
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otg_config: Section, # XXX: Not from options, see /kvmd/apps/kvmd/__init__.py for details
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) -> None:
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super().__init__(instance_name, notifier)
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self.__udc: str = otg_config.udc
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self.__init_delay: float = otg_config.init_delay
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gadget: str = otg_config.gadget
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self.__udc_path = usb.get_gadget_path(gadget, usb.G_UDC)
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self.__functions_path = usb.get_gadget_path(gadget, usb.G_FUNCTIONS)
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self.__profile_path = usb.get_gadget_path(gadget, usb.G_PROFILE)
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self.__lock = asyncio.Lock()
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@classmethod
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def get_pin_validator(cls) -> Callable[[Any], Any]:
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return valid_stripped_string_not_empty
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def prepare(self) -> None:
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self.__udc = usb.find_udc(self.__udc)
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get_logger().info("Using UDC %s", self.__udc)
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async def run(self) -> None:
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logger = get_logger(0)
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while True:
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try:
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while True:
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self._notifier.notify()
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if os.path.isfile(self.__udc_path):
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break
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await asyncio.sleep(5)
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with Inotify() as inotify:
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await inotify.watch(InotifyMask.ALL_MODIFY_EVENTS, os.path.dirname(self.__udc_path))
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await inotify.watch(InotifyMask.ALL_MODIFY_EVENTS, self.__profile_path)
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self._notifier.notify()
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while True:
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need_restart = False
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need_notify = False
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for event in (await inotify.get_series(timeout=1)):
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need_notify = True
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if event.mask & (InotifyMask.DELETE_SELF | InotifyMask.MOVE_SELF | InotifyMask.UNMOUNT):
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logger.warning("Got fatal inotify event: %s; reinitializing OTG-bind ...", event)
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need_restart = True
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break
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if need_restart:
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break
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if need_notify:
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self._notifier.notify()
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except Exception:
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logger.exception("Unexpected OTG-bind watcher error")
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await asyncio.sleep(1)
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async def read(self, pin: str) -> bool:
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if pin == "udc":
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return self.__is_udc_enabled()
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return os.path.exists(os.path.join(self.__profile_path, pin))
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async def write(self, pin: str, state: bool) -> None:
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async with self.__lock:
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if pin == "udc":
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self.__set_udc_enabled(state)
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else:
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if self.__is_udc_enabled():
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self.__set_udc_enabled(False)
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try:
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if state:
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os.symlink(
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os.path.join(self.__functions_path, pin),
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os.path.join(self.__profile_path, pin),
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)
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else:
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os.unlink(os.path.join(self.__profile_path, pin))
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finally:
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try:
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await asyncio.sleep(self.__init_delay)
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finally:
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self.__set_udc_enabled(True)
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def __set_udc_enabled(self, enabled: bool) -> None:
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with open(self.__udc_path, "w") as file:
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file.write(self.__udc if enabled else "\n")
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def __is_udc_enabled(self) -> bool:
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with open(self.__udc_path) as file:
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return bool(file.read().strip())
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def __str__(self) -> str:
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return f"GPIO({self._instance_name})"
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__repr__ = __str__
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