tractor/ipc/_linux_ns.py

@@ -1,88 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-'''
-Utils for Linux namespaces.
-
-See `man namespaces` for the high level deats!
-
-'''
-import subprocess
-import os
-from pathlib import Path
-
-
-def get_ns_inode(
-    ns_type: str = 'net',
-    pid: int = os.getpid(),
-) -> int:
-    '''
-    Return the `inode: int` for the namespace type `ns_type: str` for
-    the current process.
-
-    By default we use the  "network namespace" since it is generallly
-    used to isolate all the networ-transport domains for all IPC
-    inside `tractor.ipc`.
-
-    See for linux:
-    - `man namespaces`,
-    - `man network_namespaces`,
-     > In addition, network namespaces isolate the UNIX domain
-       abstract socket name‐ space (see unix(7))
-
-    - `man unix`,
-
-    If pid: int` is passed then do the lookup to
-    `Path(f'/proc/{pid}/ns/{ns_type}') instead of for the current
-    pid.
-
-    '''
-    ns_dir = Path(f'/proc/{pid}/ns/')
-    ns_path: Path = ns_dir / ns_type
-    entry: str = os.readlink(f'{ns_path}')
-    _ns_type: str
-    boxed_inode: str
-    _ns_type, _, boxed_inode = entry.partition(':')
-    assert ns_type == _ns_type
-
-    inode_str: str = boxed_inode[1:-1]
-    return int(inode_str)
-
-
-def get_netns(pid: int = os.getpid()) -> tuple[str|None, int]:
-    '''
-    Return the network namespace key-inode pair for the given process
-    id.
-
-    '''
-    out: str = subprocess.check_ouput([
-        'ip',
-        'netns',
-        'identify',
-        pid,
-    ])
-    netns_key: str|None = None
-    if out.decode().strip():
-        netns_key: str = out
-
-    # signifies the "default" (really just not in use)
-    # net namespace.
-    return (
-        netns_key or 'default',
-        get_ns_inode(
-            ns_type='net',
-            pid=pid,
-        ),
-    )