1/* Entering namespaces for test case isolation.
2 Copyright (C) 2016-2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#ifndef SUPPORT_NAMESPACE_H
20#define SUPPORT_NAMESPACE_H
21
22#include <stdbool.h>
23#include <sys/cdefs.h>
24
25__BEGIN_DECLS
26
27/* Attempts to become root (or acquire root-like privileges), possibly
28 with the help of user namespaces. Return true if (restricted) root
29 privileges could be attained in some way. Print diagnostics to
30 standard output.
31
32 Note that this function generally has to be called before a process
33 becomes multi-threaded, otherwise it may fail with insufficient
34 privileges on systems which would support this operation for
35 single-threaded processes. */
36bool support_become_root (void);
37
38/* Enter a network namespace (and a UTS namespace if possible) and
39 configure the loopback interface. Return true if a network
40 namespace could be created. Print diagnostics to standard output.
41 If a network namespace could be created, but networking in it could
42 not be configured, terminate the process. It is recommended to
43 call support_become_root before this function so that the process
44 has sufficient privileges. */
45bool support_enter_network_namespace (void);
46
47/* Return true if support_enter_network_namespace managed to enter a
48 UTS namespace. */
49bool support_in_uts_namespace (void);
50
51__END_DECLS
52
53#endif
54