Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** 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, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

#include "zbxnix.h"

#include "sigcommon.h"

​

#include "zbxcommon.h"

#include "log.h"

#include "fatal.h"

#include "zbxcomms.h"

​

#define ZBX_EXIT_NONE       0

#define ZBX_EXIT_SUCCESS    1

#define ZBX_EXIT_FAILURE    2

​

int             sig_parent_pid = -1;

static volatile sig_atomic_t    sig_exiting;

static volatile sig_atomic_t    sig_exit_on_terminate = 1;

static zbx_on_exit_t        zbx_on_exit_cb = NULL;

​

void    zbx_set_exiting_with_fail(void)

{

    sig_exiting = ZBX_EXIT_FAILURE;

}

​

void    zbx_set_exiting_with_succeed(void)

{

    sig_exiting = ZBX_EXIT_SUCCESS;

}

​

int ZBX_IS_RUNNING(void)

{

    return ZBX_EXIT_NONE == sig_exiting;

}

​

int ZBX_EXIT_STATUS(void)

{

    return ZBX_EXIT_SUCCESS == sig_exiting ? SUCCEED : FAIL;

}

​

static void log_fatal_signal(int sig, siginfo_t *siginfo, void *context)

{

    SIG_CHECK_PARAMS(sig, siginfo, context);

​

    zabbix_log(LOG_LEVEL_CRIT, "Got signal [signal:%d(%s),reason:%d,refaddr:%p]. Crashing ...",

            sig, get_signal_name(sig),

            SIG_CHECKED_FIELD(siginfo, si_code),

            SIG_CHECKED_FIELD_TYPE(siginfo, si_addr, void *));

}

​

static void exit_with_failure(void)

{

#if defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)

    zbx_tls_free_on_signal();

#endif

    _exit(EXIT_FAILURE);

}

​

/******************************************************************************

 *                                                                            *

 * Purpose: handle fatal signals: SIGILL, SIGFPE, SIGSEGV, SIGBUS             *

 *                                                                            *

 ******************************************************************************/

static void fatal_signal_handler(int sig, siginfo_t *siginfo, void *context)

{

    log_fatal_signal(sig, siginfo, context);

    zbx_log_fatal_info(context, ZBX_FATAL_LOG_FULL_INFO);

​

    exit_with_failure();

}

​

/******************************************************************************

 *                                                                            *

 * Purpose: same as fatal_signal_handler() but customized for metric thread - *

 *          does not log memory map                                           *