X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Faudit.c;h=4701c0a8de856548d1eb7b8e0d31dd9304636872;hb=b5884878a2874447b2a9f07f324a7cd909d96d48;hp=f101050825384ff43e5b8e1f711dfc6c93f21e09;hpb=f841a154efbb3162d2a732936f031ac7a6b0d4cf;p=elogind.git

diff --git a/src/shared/audit.c b/src/shared/audit.c
index f10105082..4701c0a8d 100644
--- a/src/shared/audit.c
+++ b/src/shared/audit.c
@@ -80,3 +80,21 @@ int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
         *uid = (uid_t) u;
         return 0;
 }
+
+bool use_audit(void) {
+        static int cached_use = -1;
+
+        if (cached_use < 0) {
+                int fd;
+
+                fd = socket(AF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_AUDIT);
+                if (fd < 0)
+                        cached_use = errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT;
+                else {
+                        cached_use = true;
+                        safe_close(fd);
+                }
+        }
+
+        return cached_use;
+}