Merge pull request #17549 from yuwata/tiny-fixes

[thirdparty/systemd.git] / src / core / audit-fd.c

diff --git a/src/core/audit-fd.c b/src/core/audit-fd.c
index 0a484d89fc427663993d2296942e71085ecde97b..097bea39b3eb85fede6ff2a52c5cc4dc0f7825da 100644 (file)
--- a/src/core/audit-fd.c
+++ b/src/core/audit-fd.c
@@ -1,34 +1,15 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2012 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <errno.h>
 
 #include "audit-fd.h"
 
-#ifdef HAVE_AUDIT
+#if HAVE_AUDIT
 
 #include <libaudit.h>
 #include <stdbool.h>
 
+#include "capability-util.h"
 #include "fd-util.h"
 #include "log.h"
 #include "util.h"
@@ -39,10 +20,17 @@ 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 (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
+                        if (!IN_SET(errno, EAFNOSUPPORT, EPROTONOSUPPORT))
                                 log_error_errno(errno, "Failed to connect to audit log: %m");
 
                         audit_fd = errno ? -errno : -EINVAL;