mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
84 lines
3.5 KiB
Python
84 lines
3.5 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 os
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import asyncio
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import asyncio.subprocess
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import logging
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from typing import Tuple
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from typing import List
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import setproctitle
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from .logging import get_logger
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# =====
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async def run_process(cmd: List[str], err_to_null: bool=False) -> asyncio.subprocess.Process: # pylint: disable=no-member
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return (await asyncio.create_subprocess_exec(
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*cmd,
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stdout=asyncio.subprocess.PIPE,
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stderr=(asyncio.subprocess.DEVNULL if err_to_null else asyncio.subprocess.STDOUT),
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preexec_fn=os.setpgrp,
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))
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async def read_process(cmd: List[str], err_to_null: bool=False) -> Tuple[asyncio.subprocess.Process, str]: # pylint: disable=no-member
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proc = await run_process(cmd, err_to_null)
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(stdout, _) = await proc.communicate()
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return (proc, stdout.decode(errors="ignore").strip())
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async def log_process(cmd: List[str], logger: logging.Logger) -> asyncio.subprocess.Process: # pylint: disable=no-member
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(proc, stdout) = await read_process(cmd)
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if stdout:
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log = (logger.info if proc.returncode == 0 else logger.error)
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for line in stdout.split("\n"):
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log("Console: %s", line)
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return proc
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async def log_stdout_infinite(proc: asyncio.subprocess.Process, logger: logging.Logger) -> None: # pylint: disable=no-member
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empty = 0
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async for line_bytes in proc.stdout: # type: ignore
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line = line_bytes.decode(errors="ignore").strip()
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if line:
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logger.info("Console: %s", line)
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empty = 0
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else:
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empty += 1
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if empty == 100: # asyncio bug
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raise RuntimeError("asyncio process: too many empty lines")
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def rename_process(suffix: str, prefix: str="kvmd") -> None:
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setproctitle.setproctitle(f"{prefix}/{suffix}: {setproctitle.getproctitle()}")
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def settle(name: str, suffix: str, prefix: str="kvmd") -> logging.Logger:
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logger = get_logger(1)
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logger.info("Started %s pid=%d", name, os.getpid())
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os.setpgrp()
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rename_process(suffix, prefix)
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return logger
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