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b3357a6f DL |
1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
b3357a6f DL |
8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
b3357a6f | 22 | */ |
495d2046 SG |
23 | #include "config.h" |
24 | ||
f1a4a029 ÇO |
25 | #ifndef __LXC_CAPS_H |
26 | #define __LXC_CAPS_H | |
7d40e69b | 27 | |
495d2046 | 28 | #if HAVE_SYS_CAPABILITY_H |
7d40e69b DL |
29 | extern int lxc_caps_down(void); |
30 | extern int lxc_caps_up(void); | |
31 | extern int lxc_caps_init(void); | |
32 | ||
20d81659 | 33 | extern int lxc_caps_last_cap(void); |
495d2046 | 34 | #else |
495d2046 | 35 | static inline int lxc_caps_down(void) { |
d028235d | 36 | return 0; |
495d2046 SG |
37 | } |
38 | static inline int lxc_caps_up(void) { | |
d028235d | 39 | return 0; |
495d2046 SG |
40 | } |
41 | static inline int lxc_caps_init(void) { | |
d028235d | 42 | return 0; |
495d2046 | 43 | } |
495d2046 SG |
44 | |
45 | static inline int lxc_caps_last_cap(void) { | |
d028235d | 46 | return 0; |
495d2046 SG |
47 | } |
48 | #endif | |
20d81659 | 49 | |
7d40e69b DL |
50 | #define lxc_priv(__lxc_function) \ |
51 | ({ \ | |
596a818d | 52 | __label__ out; \ |
c4b79084 | 53 | int __ret, __ret2, ___errno = 0; \ |
7d40e69b DL |
54 | __ret = lxc_caps_up(); \ |
55 | if (__ret) \ | |
596a818d | 56 | goto out; \ |
7d40e69b DL |
57 | __ret = __lxc_function; \ |
58 | if (__ret) \ | |
c4b79084 | 59 | ___errno = errno; \ |
7d40e69b | 60 | __ret2 = lxc_caps_down(); \ |
c4b79084 | 61 | out: __ret ? errno = ___errno,__ret : __ret2; \ |
7d40e69b DL |
62 | }) |
63 | ||
596a818d | 64 | #define lxc_unpriv(__lxc_function) \ |
7d40e69b | 65 | ({ \ |
596a818d | 66 | __label__ out; \ |
c4b79084 | 67 | int __ret, __ret2, ___errno = 0; \ |
7d40e69b DL |
68 | __ret = lxc_caps_down(); \ |
69 | if (__ret) \ | |
596a818d | 70 | goto out; \ |
7d40e69b DL |
71 | __ret = __lxc_function; \ |
72 | if (__ret) \ | |
c4b79084 | 73 | ___errno = errno; \ |
7d40e69b | 74 | __ret2 = lxc_caps_up(); \ |
c4b79084 | 75 | out: __ret ? errno = ___errno,__ret : __ret2; \ |
7d40e69b | 76 | }) |
b3357a6f | 77 | #endif |