Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxnix.h"

​

#include "nix_internal.h"

#include "sigcommon.h"

#include "pid.h"

​

#include "zbxprof.h"

#include "zbxlog.h"

#include "zbx_rtc_constants.h"

#include "zbxthreads.h"

​

#if defined(__linux__)

#define ZBX_PID_FILE_TIMEOUT 20

#define ZBX_PID_FILE_SLEEP_TIME 100000000

#endif

​

static int  parent_pid = -1;

​

/* pointer to function for getting caller's PID file location */

static zbx_get_config_str_f     get_pid_file_pathname_cb = NULL;

static zbx_get_threads_f        get_threads_func_cb;

static zbx_get_config_int_f     get_threads_num_func_cb;

​

static zbx_signal_handler_f sigusr_handler;

static zbx_signal_redirect_f    signal_redirect_handler;

​

#ifdef HAVE_SIGQUEUE

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

 *                                                                            *

 * Purpose: common SIGUSR1 handler for Zabbix processes                       *

 *                                                                            *

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

static void common_sigusr_handler(int flags)

{

    switch (ZBX_RTC_GET_MSG(flags))

    {

        case ZBX_RTC_LOG_LEVEL_INCREASE:

            zabbix_increase_log_level();

            break;

        case ZBX_RTC_PROF_ENABLE:

            zbx_prof_enable(ZBX_RTC_GET_SCOPE(flags));

            break;

        case ZBX_RTC_PROF_DISABLE:

            zbx_prof_disable();

            break;

        case ZBX_RTC_LOG_LEVEL_DECREASE:

            zabbix_decrease_log_level();

            break;

        default: