mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
124 lines
4.7 KiB
Python
124 lines
4.7 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 signal
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import asyncio
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import asyncio.subprocess
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import logging
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from .lanuages import Lanuages
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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(
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cmd: list[str],
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err_to_null: bool=False,
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env: (dict[str, str] | None)=None,
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) -> 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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env=env,
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))
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async def read_process(
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cmd: list[str],
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err_to_null: bool=False,
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env: (dict[str, str] | None)=None,
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) -> tuple[asyncio.subprocess.Process, str]: # pylint: disable=no-member
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proc = await run_process(cmd, err_to_null, env)
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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(
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cmd: list[str],
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logger: logging.Logger,
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env: (dict[str, str] | None)=None,
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prefix: str="",
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) -> asyncio.subprocess.Process: # pylint: disable=no-member
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(proc, stdout) = await read_process(cmd, env=env)
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if stdout:
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log = (logger.info if proc.returncode == 0 else logger.error)
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if prefix:
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prefix += " "
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for line in stdout.split("\n"):
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log("%s=> %s", prefix, 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("=> %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(Lanuages().gettext("Asyncio process: too many empty lines"))
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async def kill_process(proc: asyncio.subprocess.Process, wait: float, logger: logging.Logger) -> None: # pylint: disable=no-member
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if proc.returncode is None:
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try:
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proc.terminate()
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await asyncio.sleep(wait)
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if proc.returncode is None:
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try:
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os.killpg(os.getpgid(proc.pid), signal.SIGKILL)
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except Exception:
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if proc.returncode is not None:
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raise
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await proc.wait()
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logger.info(Lanuages().gettext("Process killed: retcode=%d"), proc.returncode)
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except asyncio.CancelledError:
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pass
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except Exception:
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if proc.returncode is None:
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logger.exception(Lanuages().gettext("Can't kill process pid=%d"), proc.pid)
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else:
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logger.info(Lanuages().gettext("Process killed: retcode=%d"), proc.returncode)
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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(Lanuages().gettext("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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