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author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2018-11-30 10:09:00 +0100 |
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committer | GitHub <noreply@github.com> | 2018-11-30 10:09:00 +0100 |
commit | b2ac2b01c8ddaabbe63bcb7168dd752f44320d86 (patch) | |
tree | 91b74d45e81f52ee09019fa33e92ab926eac2f5d /src/basic/capability-util.h | |
parent | 00195abcbeeba5c8b87b35c3626e9f9ed8b48d9c (diff) | |
parent | 8f2eb7302dc98794247d49c85d8a366d89218aee (diff) | |
download | systemd-b2ac2b01c8ddaabbe63bcb7168dd752f44320d86.tar.gz |
Merge pull request #10996 from poettering/oci-prep
Preparation for the nspawn-OCI work
Diffstat (limited to 'src/basic/capability-util.h')
-rw-r--r-- | src/basic/capability-util.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/basic/capability-util.h b/src/basic/capability-util.h index 59591d4b52..e0e0b1c0fa 100644 --- a/src/basic/capability-util.h +++ b/src/basic/capability-util.h @@ -43,3 +43,27 @@ 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); |