diff options
Diffstat (limited to 'src/basic/capability-util.h')
-rw-r--r-- | src/basic/capability-util.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/basic/capability-util.h b/src/basic/capability-util.h index 4a4a86093a..02c7d5c3e2 100644 --- a/src/basic/capability-util.h +++ b/src/basic/capability-util.h @@ -7,6 +7,7 @@ #include <sys/types.h> #include "macro.h" +#include "missing_capability.h" #include "util.h" #define CAP_ALL (uint64_t) -1 @@ -39,3 +40,31 @@ static inline bool cap_test_all(uint64_t caps) { } bool ambient_capabilities_supported(void); + +/* Identical to linux/capability.h's CAP_TO_MASK(), but uses an unsigned 1U instead of a signed 1 for shifting left, in + * order to avoid complaints about shifting a signed int left by 31 bits, which would make it negative. */ +#define CAP_TO_MASK_CORRECTED(x) (1U << ((x) & 31U)) + +typedef struct CapabilityQuintet { + /* Stores all five types of capabilities in one go. Note that we use (uint64_t) -1 for unset here. This hence + * needs to be updated as soon as Linux learns more than 63 caps. */ + uint64_t effective; + uint64_t bounding; + uint64_t inheritable; + uint64_t permitted; + uint64_t ambient; +} CapabilityQuintet; + +assert_cc(CAP_LAST_CAP < 64); + +#define CAPABILITY_QUINTET_NULL { (uint64_t) -1, (uint64_t) -1, (uint64_t) -1, (uint64_t) -1, (uint64_t) -1 } + +static inline bool capability_quintet_is_set(const CapabilityQuintet *q) { + return q->effective != (uint64_t) -1 || + q->bounding != (uint64_t) -1 || + q->inheritable != (uint64_t) -1 || + q->permitted != (uint64_t) -1 || + q->ambient != (uint64_t) -1; +} + +int capability_quintet_enforce(const CapabilityQuintet *q); |