1 files changed, 63 insertions, 0 deletions
diff --git a/src/core/audit-fd.c b/src/core/audit-fd.c
new file mode 100644
index 0000000..fdef433
--- /dev/null
+++ b/src/core/audit-fd.c
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+
+#include "audit-fd.h"
+
+#if HAVE_AUDIT
+
+#include <libaudit.h>
+#include <stdbool.h>
+
+#include "capability-util.h"
+#include "fd-util.h"
+#include "log.h"
+#include "util.h"
+
+static bool initialized = false;
+static int audit_fd;
+
+int get_audit_fd(void) {
+
+        if (!initialized) {
+                if (have_effective_cap(CAP_AUDIT_WRITE) == 0) {
+                        audit_fd = -EPERM;
+                        initialized = true;
+
+                        return audit_fd;
+                }
+
+                audit_fd = audit_open();
+
+                if (audit_fd < 0) {
+                        if (!IN_SET(errno, EAFNOSUPPORT, EPROTONOSUPPORT))
+                                log_error_errno(errno, "Failed to connect to audit log: %m");
+
+                        audit_fd = errno ? -errno : -EINVAL;
+                }
+
+                initialized = true;
+        }
+
+        return audit_fd;
+}
+
+void close_audit_fd(void) {
+
+        if (initialized && audit_fd >= 0)
+                safe_close(audit_fd);
+
+        initialized = true;
+        audit_fd = -ECONNRESET;
+}
+
+#else
+
+int get_audit_fd(void) {
+        return -EAFNOSUPPORT;
+}
+
+void close_audit_fd(void) {
+}
+
+#endif