Line data    Source code

       1             : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
       2             : 
       3             : /***
       4             :   This file is part of systemd.
       5             : 
       6             :   Copyright 2012 Lennart Poettering
       7             : 
       8             :   systemd is free software; you can redistribute it and/or modify it
       9             :   under the terms of the GNU Lesser General Public License as published by
      10             :   the Free Software Foundation; either version 2.1 of the License, or
      11             :   (at your option) any later version.
      12             : 
      13             :   systemd is distributed in the hope that it will be useful, but
      14             :   WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
      16             :   Lesser General Public License for more details.
      17             : 
      18             :   You should have received a copy of the GNU Lesser General Public License
      19             :   along with systemd; If not, see <http://www.gnu.org/licenses/>.
      20             : ***/
      21             : 
      22             : 
      23             : #include <errno.h>
      24             : #include "audit-fd.h"
      25             : 
      26             : #ifdef HAVE_AUDIT
      27             : 
      28             : #include <stdbool.h>
      29             : #include <libaudit.h>
      30             : 
      31             : #include "log.h"
      32             : #include "util.h"
      33             : 
      34             : static bool initialized = false;
      35             : static int audit_fd;
      36             : 
      37           0 : int get_audit_fd(void) {
      38             : 
      39           0 :         if (!initialized) {
      40           0 :                 audit_fd = audit_open();
      41             : 
      42           0 :                 if (audit_fd < 0) {
      43           0 :                         if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
      44           0 :                                 log_error_errno(errno, "Failed to connect to audit log: %m");
      45             : 
      46           0 :                         audit_fd = errno ? -errno : -EINVAL;
      47             :                 }
      48             : 
      49           0 :                 initialized = true;
      50             :         }
      51             : 
      52           0 :         return audit_fd;
      53             : }
      54             : 
      55           0 : void close_audit_fd(void) {
      56             : 
      57           0 :         if (initialized && audit_fd >= 0)
      58           0 :                 safe_close(audit_fd);
      59             : 
      60           0 :         initialized = true;
      61           0 :         audit_fd = -ECONNRESET;
      62           0 : }
      63             : 
      64             : #else
      65             : 
      66             : int get_audit_fd(void) {
      67             :         return -EAFNOSUPPORT;
      68             : }
      69             : 
      70             : void close_audit_fd(void) {
      71             : }
      72             : 
      73             : #endif