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seccomp: minor simplifications for is_seccomp_available()

This commit is contained in:
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) {
int r;
r = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
return r >= 0;
return prctl(PR_GET_SECCOMP, 0, 0, 0, 0) >= 0;
}
static bool is_seccomp_filter_available(void) {
int r;
r = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
return r < 0 && errno == EFAULT;
return prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0) < 0 &&
errno == EFAULT;
}
bool is_seccomp_available(void) {
static int cached_enabled = -1;
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;
}