| # Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Support for Linux namespaces""" |
| |
| import ctypes |
| import ctypes.util |
| import os |
| |
| |
| CLONE_FS = 0x00000200 |
| CLONE_FILES = 0x00000400 |
| CLONE_NEWNS = 0x00020000 |
| CLONE_NEWUTS = 0x04000000 |
| CLONE_NEWIPC = 0x08000000 |
| CLONE_NEWUSER = 0x10000000 |
| CLONE_NEWPID = 0x20000000 |
| CLONE_NEWNET = 0x40000000 |
| |
| |
| def Unshare(flags): |
| """Binding to the Linux unshare system call. See unshare(2) for details. |
| |
| Args: |
| flags: Namespaces to unshare; bitwise OR of CLONE_* flags. |
| |
| Raises: |
| OSError: if unshare failed. |
| """ |
| libc = ctypes.CDLL(ctypes.util.find_library("c"), use_errno=True) |
| if libc.unshare(ctypes.c_int(flags)) != 0: |
| e = ctypes.get_errno() |
| raise OSError(e, os.strerror(e)) |
