mirror of
https://github.com/mofeng-git/One-KVM.git
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108 lines
3.8 KiB
Python
108 lines
3.8 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main Pi-KVM daemon. #
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# #
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# Copyright (C) 2018-2021 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 sys
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import os
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import re
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import shutil
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import dataclasses
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import subprocess
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# ====
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_MOUNT_PATH = "/bin/mount"
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_FSTAB_PATH = "/etc/fstab"
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# =====
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@dataclasses.dataclass(frozen=True)
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class _Storage:
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mount_path: str
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root_path: str
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user: str
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# =====
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def _log(msg: str) -> None:
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print(msg, file=sys.stderr)
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def _find_storage() -> _Storage:
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with open(_FSTAB_PATH) as fstab_file:
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for line in fstab_file.read().split("\n"):
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line = line.strip()
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if line and not line.startswith("#"):
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parts = line.split()
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if len(parts) == 6:
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options = dict(re.findall(r"X-kvmd\.otgmsd-(root|user)=([^,]+)", parts[3]))
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if options:
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return _Storage(
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mount_path=parts[1],
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root_path=options.get("root", ""),
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user=options.get("user", ""),
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)
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raise RuntimeError(f"Can't find MSD mountpoint in {_FSTAB_PATH}")
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def _remount(path: str, rw: bool) -> None:
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mode = ("rw" if rw else "ro")
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_log(f"Remounting {path} to {mode.upper()}-mode ...")
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try:
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subprocess.check_call([_MOUNT_PATH, "--options", f"remount,{mode}", path])
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except subprocess.CalledProcessError as err:
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raise SystemExit(f"Can't remount: {err}")
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def _mkdir(path: str) -> None:
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if not os.path.exists(path):
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_log(f"MKDIR --- {path}")
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try:
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os.mkdir(path)
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except Exception as err:
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raise SystemExit(f"Can't create directory: {err}")
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def _chown(path: str, user: str) -> None:
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_log(f"CHOWN --- {user} - {path}")
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try:
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shutil.chown(path, user)
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except Exception as err:
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raise SystemExit(f"Can't change ownership: {err}")
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# =====
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def main() -> None:
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if len(sys.argv) != 2 or sys.argv[1] not in ["ro", "rw"]:
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raise SystemExit(f"Usage: {sys.argv[0]} [ro|rw]")
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rw = (sys.argv[1] == "rw")
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storage = _find_storage()
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_remount(storage.mount_path, rw)
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if rw:
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if storage.root_path:
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for name in ["images", "meta"]:
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path = os.path.join(storage.root_path, name)
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_mkdir(path)
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if storage.user:
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_chown(path, storage.user)
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