You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
136 lines
2.9 KiB
136 lines
2.9 KiB
/*
|
|
* auditd.c: This is a simple audit daemon that throws all messages away.
|
|
*
|
|
* Copyright (C) 2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Author(s): Peter Jones <pjones@redhat.com>
|
|
*/
|
|
|
|
#define _GNU_SOURCE 1
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/poll.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
|
|
#include <libaudit.h>
|
|
|
|
#include "auditd.h"
|
|
|
|
#ifdef USESELINUX
|
|
static int done;
|
|
|
|
static void sig_done(int sig)
|
|
{
|
|
done = 1;
|
|
}
|
|
|
|
static void do_auditd(int fd) {
|
|
struct audit_reply rep;
|
|
sigset_t sigs;
|
|
struct sigaction sa;
|
|
struct pollfd pds = {
|
|
.events = POLLIN,
|
|
.revents = 0,
|
|
.fd = fd,
|
|
};
|
|
|
|
if (audit_set_pid(fd, getpid(), WAIT_YES) < 0)
|
|
return;
|
|
|
|
if (audit_set_enabled(fd, 1) < 0)
|
|
return;
|
|
|
|
memset(&sa, '\0', sizeof (sa));
|
|
sa.sa_handler = sig_done;
|
|
sigaction(SIGTERM, &sa, NULL);
|
|
sigaction(SIGINT, &sa, NULL);
|
|
sigaction(SIGHUP, &sa, NULL);
|
|
|
|
sigfillset(&sigs);
|
|
sigdelset(&sigs, SIGTERM);
|
|
sigdelset(&sigs, SIGINT);
|
|
sigdelset(&sigs, SIGHUP);
|
|
|
|
while (1) {
|
|
int retval;
|
|
|
|
memset(&rep, 0, sizeof(rep));
|
|
|
|
do {
|
|
retval = ppoll(&pds, 1, NULL, &sigs);
|
|
} while (retval == -1 && errno == EINTR && !done);
|
|
|
|
if (done)
|
|
break;
|
|
|
|
if (audit_get_reply(fd, &rep, GET_REPLY_NONBLOCKING, 0) > 0) {
|
|
/* we don't actually want to do anything here. */
|
|
;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
#endif /* USESELINUX */
|
|
|
|
int audit_daemonize(void) {
|
|
#ifdef USESELINUX
|
|
int fd;
|
|
#ifndef STANDALONE
|
|
int i;
|
|
pid_t child;
|
|
|
|
if ((child = fork()) > 0)
|
|
return 0;
|
|
|
|
for (i = 0; i < getdtablesize(); i++)
|
|
close(i);
|
|
|
|
signal(SIGTTOU, SIG_IGN);
|
|
signal(SIGTTIN, SIG_IGN);
|
|
signal(SIGTSTP, SIG_IGN);
|
|
|
|
if ((fd = open("/proc/self/oom_adj", O_RDWR)) >= 0) {
|
|
i = write(fd, "-17", 3);
|
|
close(fd);
|
|
}
|
|
|
|
#endif /* !defined(STANDALONE) */
|
|
fd = audit_open();
|
|
do_auditd(fd);
|
|
audit_close(fd);
|
|
#ifndef STANDALONE
|
|
exit(0);
|
|
#endif /* !defined(STANDALONE) */
|
|
#endif /* USESELINUX */
|
|
return 0;
|
|
}
|
|
|
|
#ifdef STANDALONE
|
|
int main(void) {
|
|
return audit_daemonize();
|
|
}
|
|
#endif /* STANDALONE */
|
|
|
|
/*
|
|
* vim:ts=8:sw=4:sts=4:et
|
|
*/
|