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c5d631fd09
Summary: Now that Linux/macOS startup no longer uses fork it becomes trivial to share the same code with Windows. This improves Windows startup in several different ways: - `edenfsctl start` now displays the status of the start process in the console - `edenfsctl start` no longer has an arbitrary timeout after which it reports a timeout even though EdenFS is still starting up. This also kills a bunch of Windows specific code that is no longer needed. Reviewed By: fanzeyi Differential Revision: D24393690 fbshipit-source-id: 28100aec96da81c92d5b592353edceed332e2364
128 lines
3.9 KiB
Python
128 lines
3.9 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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import ctypes
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import datetime
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import sys
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import types
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from ctypes.wintypes import BOOL as _BOOL, DWORD as _DWORD, HANDLE as _HANDLE
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from pathlib import Path
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from typing import Iterable, NoReturn, Optional, Type
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from . import proc_utils
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if sys.platform == "win32":
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_win32 = ctypes.windll.kernel32
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_win32.OpenProcess.argtypes = [_DWORD, _BOOL, _DWORD]
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_win32.OpenProcess.restype = _HANDLE
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def raise_win_error() -> NoReturn:
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raise ctypes.WinError()
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else:
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# This entire file is only ever imported in Windows. However on our continuous
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# integration environments Pyre currently does all of its type checking assuming
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# Linux. Define a fake kernel32 module just to allow it to still perform some type
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# checking for us.
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class _win32:
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@staticmethod
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def OpenProcess(desired_access: int, inherit_handle: bool, pid: int) -> _HANDLE:
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...
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@staticmethod
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def CloseHandle(handle: _HANDLE) -> None:
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...
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@staticmethod
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def TerminateProcess(handle: _HANDLE, exit_code: int) -> bool:
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...
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def raise_win_error() -> NoReturn:
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...
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_PROCESS_TERMINATE = 0x0001
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_PROCESS_QUERY_LIMITED_INFORMATION = 0x1000
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_ERROR_ACCESS_DENIED = 5
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_CREATE_NO_WINDOW = 0x08000000
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class Handle:
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handle: _HANDLE
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def __init__(self, handle: _HANDLE) -> None:
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self.handle = handle
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def __enter__(self) -> "Handle":
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return self
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def __exit__(
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self,
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exc_type: Optional[Type[BaseException]],
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exc_value: Optional[BaseException],
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tb: Optional[types.TracebackType],
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) -> None:
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self.close()
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def close(self) -> None:
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if self.handle:
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_win32.CloseHandle(self.handle)
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self.handle = _HANDLE()
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def open_process(pid: int, access: int = _PROCESS_QUERY_LIMITED_INFORMATION) -> Handle:
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handle_value = _win32.OpenProcess(access, False, pid)
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if handle_value is None:
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raise_win_error()
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return Handle(handle_value)
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class WinProcUtils(proc_utils.ProcUtils):
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def get_edenfs_processes(self) -> Iterable[proc_utils.EdenFSProcess]:
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# TODO: Finding all EdenFS processes is not yet implemented on Windows
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# This function is primarily used by `eden doctor` and other tools looking for
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# stale EdenFS instances on the system. Returning an empty list for now will
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# allow those tools to run but just not find any stale processes.
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return []
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def get_process_start_time(self, pid: int) -> float:
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raise NotImplementedError(
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"Windows does not currently implement get_process_start_time()"
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)
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def is_system_idle(
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self, tty_idle_timeout: datetime.timedelta, root_path: Path
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) -> bool:
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raise NotImplementedError(
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"Windows does not currently implement is_system_idle()"
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)
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def kill_process(self, pid: int) -> None:
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with open_process(pid, _PROCESS_TERMINATE) as p:
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exit_code = 1
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if not _win32.TerminateProcess(p.handle, exit_code):
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raise_win_error()
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def is_process_alive(self, pid: int) -> bool:
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try:
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handle = open_process(pid)
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except PermissionError:
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# The process exists, but we don't have permission to query it.
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return True
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except OSError:
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return False
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handle.close()
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return True
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def is_edenfs_process(self, pid: int) -> bool:
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# For now we just check that the process exists.
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# In the future it might be nice to also check if the command line or executable
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# looks like EdenFS, but this is sufficient for now.
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return self.is_process_alive(pid)
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