mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
95 lines
3.8 KiB
Python
95 lines
3.8 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) 2018-2024 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 errno
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from .... import usb
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from .. import MsdOperationError
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# =====
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class MsdDriveLockedError(MsdOperationError):
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def __init__(self) -> None:
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super().__init__("MSD drive is locked on IO operation")
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# =====
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class Drive:
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def __init__(self, gadget: str, instance: int, lun: int) -> None:
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func = f"mass_storage.usb{instance}"
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self.__udc_path = os.path.join(f"/sys/kernel/config/usb_gadget", gadget, usb.G_UDC)
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self.__profile_func_path = usb.get_gadget_path(gadget, usb.G_PROFILE, func)
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self.__profile_path = usb.get_gadget_path(gadget, usb.G_PROFILE)
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self.__lun_path = usb.get_gadget_path(gadget, usb.G_FUNCTIONS, func, f"lun.{lun}")
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def is_enabled(self) -> bool:
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return os.path.exists(self.__profile_func_path)
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def get_watchable_paths(self) -> list[str]:
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return [self.__lun_path, self.__profile_path]
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def get_udc_path(self) -> str:
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return self.__udc_path
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# =====
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def set_image_path(self, path: str) -> None:
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if path or not self.__has_param("forced_eject"):
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self.__set_param("file", path)
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else:
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self.__set_param("forced_eject", "")
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def get_image_path(self) -> str:
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path = self.__get_param("file")
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return (os.path.normpath(path) if path else "")
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def set_cdrom_flag(self, flag: bool) -> None:
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self.__set_param("cdrom", str(int(flag)))
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def get_cdrom_flag(self) -> bool:
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return bool(int(self.__get_param("cdrom")))
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def set_rw_flag(self, flag: bool) -> None:
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self.__set_param("ro", str(int(not flag)))
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def get_rw_flag(self) -> bool:
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return (not int(self.__get_param("ro")))
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# =====
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def __has_param(self, param: str) -> bool:
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return os.access(os.path.join(self.__lun_path, param), os.F_OK)
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def __get_param(self, param: str) -> str:
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with open(os.path.join(self.__lun_path, param)) as file:
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return file.read().strip()
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def __set_param(self, param: str, value: str) -> None:
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try:
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with open(os.path.join(self.__lun_path, param), "w") as file:
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file.write(value + "\n")
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except OSError as ex:
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if ex.errno == errno.EBUSY:
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raise MsdDriveLockedError()
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raise
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