caps.h revision 250b1eec71b074acdff1c5f6b5a1f0d7d2c20b77
/*
* lxc: linux Container library
*
* (C) Copyright IBM Corp. 2007, 2008
*
* Authors:
* Daniel Lezcano <daniel.lezcano at free.fr>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#ifndef _caps_h
#define _caps_h
#if HAVE_SYS_CAPABILITY_H
extern int lxc_caps_reset(void);
extern int lxc_caps_down(void);
extern int lxc_caps_up(void);
extern int lxc_caps_init(void);
extern int lxc_caps_last_cap(void);
#else
static inline int lxc_caps_reset(void) {
return 0;
}
static inline int lxc_caps_down(void) {
return 0;
}
static inline int lxc_caps_up(void) {
return 0;
}
static inline int lxc_caps_init(void) {
return 0;
}
static inline int lxc_caps_last_cap(void) {
return 0;
}
#endif
#define lxc_priv(__lxc_function) \
({ \
__label__ out; \
int __ret, __ret2, ___errno = 0; \
__ret = lxc_caps_up(); \
if (__ret) \
goto out; \
__ret = __lxc_function; \
if (__ret) \
___errno = errno; \
__ret2 = lxc_caps_down(); \
out: __ret ? errno = ___errno,__ret : __ret2; \
})
#define lxc_unpriv(__lxc_function) \
({ \
__label__ out; \
int __ret, __ret2, ___errno = 0; \
__ret = lxc_caps_down(); \
if (__ret) \
goto out; \
__ret = __lxc_function; \
if (__ret) \
___errno = errno; \
__ret2 = lxc_caps_up(); \
out: __ret ? errno = ___errno,__ret : __ret2; \
})
#endif