This macro is a helper to call a function into a [un]privilegied section.
Signed-off-by: Daniel Lezcano <dlezc...@fr.ibm.com>
---
src/lxc/caps.h | 33 ++++++++++++++++++++++++++++++---
1 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/src/lxc/caps.h b/src/lxc/caps.h
index bdc248b..6b27648 100644
--- a/src/lxc/caps.h
+++ b/src/lxc/caps.h
@@ -22,7 +22,34 @@
*/
#ifndef _caps_h
#define _caps_h
-int lxc_caps_down(void);
-int lxc_caps_up(void);
-int lxc_caps_init(void);
+
+extern int lxc_caps_down(void);
+extern int lxc_caps_up(void);
+extern int lxc_caps_init(void);
+
+#define lxc_priv(__lxc_function) \
+ ({ \
+ 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) \
+ ({ \
+ 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
--
1.7.0.4
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