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authorLennart Poettering <lennart@poettering.net>2012-10-02 17:40:09 -0400
committerLennart Poettering <lennart@poettering.net>2012-10-02 17:40:09 -0400
commitc1165f822cd9f8c3467b5f825ce933ab8374b361 (patch)
treeb986e9e6ead9693bdd4785f52ea7e6503bbf92bc /src/core/audit-fd.c
parentcad45ba11ec3572296361f53f5852ffb97a97fa3 (diff)
audit: turn the audit fd into a static variable
As audit is pretty much just a special kind of logging we should treat it similar, and manage the audit fd in a static variable. This simplifies the audit fd sharing with the SELinux access checking code quite a bit.
Diffstat (limited to 'src/core/audit-fd.c')
-rw-r--r--src/core/audit-fd.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/core/audit-fd.c b/src/core/audit-fd.c
new file mode 100644
index 0000000000..0a8626fbc2
--- /dev/null
+++ b/src/core/audit-fd.c
@@ -0,0 +1,71 @@
+/*-*- 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/>.
+***/
+
+#include <stdbool.h>
+#include <errno.h>
+
+#include "audit-fd.h"
+#include "log.h"
+
+#ifdef HAVE_AUDIT
+
+#include <libaudit.h>
+
+static bool initialized = false;
+static int audit_fd;
+
+int get_audit_fd(void) {
+
+ if (!initialized) {
+ audit_fd = audit_open();
+
+ if (audit_fd < 0) {
+ if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
+ log_error("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)
+ close_nointr_nofail(audit_fd);
+
+ initialized = true;
+ audit_fd = -ECONNRESET;
+}
+
+#else
+
+int get_audit_fd(void) {
+ return -EAFNOSUPPORT;
+}
+
+void close_audit_fd(void) {
+}
+
+#endif