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seccomp: minor simplifications for is_seccomp_available()

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Lennart Poettering 2016-12-27 16:50:02 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent 469830d142
commit 4d5bd50ab2
1 changed files with 8 additions and 7 deletions
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15
src/shared/seccomp-util.c
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@ -204,21 +204,22 @@ finish:
} }
static bool is_basic_seccomp_available(void) { static bool is_basic_seccomp_available(void) {
int r; return prctl(PR_GET_SECCOMP, 0, 0, 0, 0) >= 0;
r = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
return r >= 0;
} }
static bool is_seccomp_filter_available(void) { static bool is_seccomp_filter_available(void) {
int r; return prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0) < 0 &&
r = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0); errno == EFAULT;
return r < 0 && errno == EFAULT;
} }
bool is_seccomp_available(void) { bool is_seccomp_available(void) {
static int cached_enabled = -1; static int cached_enabled = -1;
if (cached_enabled < 0) if (cached_enabled < 0)
cached_enabled = is_basic_seccomp_available() && is_seccomp_filter_available(); cached_enabled =
is_basic_seccomp_available() &&
is_seccomp_filter_available();
return cached_enabled; return cached_enabled;
} }