/*
** 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 "agent_conf/agent_conf.h"
#include "zbxlog.h"
#include "zbxsysinfo.h"
#include "zbxcomms.h"
#include "zbxexpr.h"
#include "zbxgetopt.h"
#include "zbxip.h"
#include "zbxstr.h"
#include "zbxthreads.h"
#include "zbx_rtc_constants.h"
#include "zbxalgo.h"
#include "zbxcfg.h"
#include "zbxmutexs.h"
#include "zbxbincommon.h"
static char *config_pid_file = NULL;
static char *zbx_config_hosts_allowed = NULL;
ZBX_GET_CONFIG_VAR2(char *, const char *, zbx_config_hostnames, NULL)
static char *config_hostname_item = NULL;
ZBX_GET_CONFIG_VAR2(char *, const char *, zbx_config_host_metadata, NULL)
ZBX_GET_CONFIG_VAR2(char *, const char *, zbx_config_host_metadata_item, NULL)
static char *zbx_config_host_interface = NULL;
static char *zbx_config_host_interface_item = NULL;
ZBX_GET_CONFIG_VAR2(ZBX_THREAD_LOCAL char *, const char *, zbx_config_hostname, NULL)
ZBX_GET_CONFIG_VAR(int, zbx_config_enable_remote_commands, 1)
ZBX_GET_CONFIG_VAR(int, zbx_config_log_remote_commands, 0)
ZBX_GET_CONFIG_VAR(int, zbx_config_unsafe_user_parameters, 0)
static int zbx_config_listen_port = ZBX_DEFAULT_AGENT_PORT;
static char *zbx_config_listen_ip = NULL;
static int zbx_config_refresh_active_checks = 5;
ZBX_GET_CONFIG_VAR2(char*, const char *, zbx_config_source_ip, NULL)
static int config_log_level = LOG_LEVEL_WARNING;
static int zbx_config_buffer_size = 100;
static int zbx_config_buffer_send = 5;
static int zbx_config_max_lines_per_second = 20;
static int zbx_config_eventlog_max_lines_per_second = 20;
static char *config_load_module_path = NULL;
static char **config_aliases = NULL;
static char **config_load_module = NULL;
static char **config_user_parameters = NULL;
static char *config_user_parameter_dir = NULL;
#if defined(_WINDOWS)
static char **config_perf_counters = NULL;
static char **config_perf_counters_en = NULL;
#endif
#define ZBX_SERVICE_NAME_LEN 64
char zabbix_service_name[ZBX_SERVICE_NAME_LEN] = APPLICATION_NAME;
static const char *get_zbx_service_name(void)
{
return zabbix_service_name;
}
char zabbix_event_source[ZBX_SERVICE_NAME_LEN] = APPLICATION_NAME;
#if defined(_WINDOWS)
static const char *get_zbx_event_source(void)
{
return zabbix_event_source;
}
#endif
#undef ZBX_SERVICE_NAME_LEN
static char *config_user = NULL;
static zbx_config_tls_t *zbx_config_tls = NULL;
static int config_tcp_max_backlog_size = SOMAXCONN;
int zbx_config_heartbeat_frequency = 60;
#ifndef _WINDOWS
# include "../libs/zbxnix/control.h"
# include "zbxmodules.h"
#endif
#ifdef _WINDOWS
# include "zbxwin32.h"
#endif
#include "active_checks/active_checks.h"
#include "listener/listener.h"
#if defined(ZABBIX_SERVICE)
# include "zbxwinservice.h"
#elif defined(ZABBIX_DAEMON)
# include "zbxnix.h"
#endif
/* application TITLE */
static const char title_message[] = "zabbix_agentd"
#if defined(_WIN64)
" Win64"
#elif defined(_WIN32)
" Win32"
#endif
#if defined(ZABBIX_SERVICE)
" (service)"
#elif defined(ZABBIX_DAEMON)
" (daemon)"
#endif
;
/* end of application TITLE */
static const char syslog_app_name[] = "zabbix_agentd";
/* application USAGE message */
static const char *usage_message[] = {
"[-c config-file]", NULL,
"[-c config-file]", "-p", NULL,
"[-c config-file]", "-t item-key", NULL,
"[-c config-file]", "-T", NULL,
#ifdef _WINDOWS
"[-c config-file]", "[-m] [-S " ZBX_SERVICE_STARTUP_AUTOMATIC "]", NULL,
"[-c config-file]", "[-m] [-S " ZBX_SERVICE_STARTUP_DELAYED "]", NULL,
"[-c config-file]", "[-m] [-S " ZBX_SERVICE_STARTUP_MANUAL "]", NULL,
"[-c config-file]", "[-m] [-S " ZBX_SERVICE_STARTUP_DISABLED "]", NULL,
"[-c config-file]", "-i", "[-m] [-S " ZBX_SERVICE_STARTUP_AUTOMATIC "]", NULL,
"[-c config-file]", "-i", "[-m] [-S " ZBX_SERVICE_STARTUP_DELAYED "]", NULL,
"[-c config-file]", "-i", "[-m] [-S " ZBX_SERVICE_STARTUP_MANUAL "]", NULL,
"[-c config-file]", "-i", "[-m] [-S " ZBX_SERVICE_STARTUP_DISABLED "]", NULL,
"[-c config-file]", "-d", "[-m]", NULL,
"[-c config-file]", "-s", "[-m]", NULL,
"[-c config-file]", "-x", "[-m]", NULL,
#else
"[-c config-file]", "-R runtime-option", NULL,
#endif
"-h", NULL,
"-V", NULL,
NULL /* end of text */
};
/* end of application USAGE message */
/* application HELP message */
static const char *help_message[] = {
"A Zabbix daemon for monitoring of various server parameters.",
"",
"Options:",
" -c --config config-file Path to the configuration file",
#ifdef _WINDOWS
" (default: \"{DEFAULT_CONFIG_FILE}\")",
#else
" (default: \"" DEFAULT_CONFIG_FILE "\")",
#endif
" -f --foreground Run Zabbix agent in foreground",
" -p --print Print known items and exit",
" -t --test item-key Test specified item and exit",
" -T --test-config Validate configuration file and exit",
#ifdef _WINDOWS
" -m --multiple-agents For -i -d -s -x functions service name will",
" include Hostname parameter specified in",
" configuration file",
" -S --startup-type Set startup type of the Zabbix Windows",
" agent service to be installed. Allowed values:",
" " ZBX_SERVICE_STARTUP_AUTOMATIC " (default), " ZBX_SERVICE_STARTUP_DELAYED
", " ZBX_SERVICE_STARTUP_MANUAL ", " ZBX_SERVICE_STARTUP_DISABLED,
"Functions:",
"",
" -i --install Install Zabbix agent as service",
" -d --uninstall Uninstall Zabbix agent from service",
" -s --start Start Zabbix agent service",
" -x --stop Stop Zabbix agent service",
#else
" -R --runtime-control runtime-option Perform administrative functions",
"",
" Runtime control options:",
" " ZBX_USER_PARAMETERS_RELOAD " Reload user parameters from the configuration file",
" " ZBX_LOG_LEVEL_INCREASE "=target Increase log level, affects all processes if",
" target is not specified",
" " ZBX_LOG_LEVEL_DECREASE "=target Decrease log level, affects all processes if",
" target is not specified",
"",
" Log level control targets:",
" process-type All processes of specified type (active checks,",
" collector, listener)",
" process-type,N Process type and number (e.g., listener,3)",
" pid Process identifier, up to 65535. For larger",
" values specify target as \"process-type,N\"",
#endif
"",
" -h --help Display this help message",
" -V --version Display version number",
"",
#ifndef _WINDOWS
"Default loadable module location:",
" LoadModulePath \"" DEFAULT_LOAD_MODULE_PATH "\"",
"",
#endif
#ifdef _WINDOWS
"Example: zabbix_agentd -c C:\\zabbix\\zabbix_agentd.conf",
#else
"Example: zabbix_agentd -c /etc/zabbix/zabbix_agentd.conf",
#endif
NULL /* end of text */
};
/* end of application HELP message */
/* COMMAND LINE OPTIONS */
static struct zbx_option longopts[] =
{
{"config", 1, NULL, 'c'},
{"foreground", 0, NULL, 'f'},
{"help", 0, NULL, 'h'},
{"version", 0, NULL, 'V'},
{"print", 0, NULL, 'p'},
{"test", 1, NULL, 't'},
{"test-config", 0, NULL, 'T'},
#ifndef _WINDOWS
{"runtime-control", 1, NULL, 'R'},
#else
{"install", 0, NULL, 'i'},
{"uninstall", 0, NULL, 'd'},
{"start", 0, NULL, 's'},
{"stop", 0, NULL, 'x'},
{"multiple-agents", 0, NULL, 'm'},
{"startup-type", 1, NULL, 'S'},
#endif
{0}
};
static char shortopts[] =
"c:hVpt:Tf"
#ifndef _WINDOWS
"R:"
#else
"idsxmS:"
#endif
;
/* end of COMMAND LINE OPTIONS */
static char *TEST_METRIC = NULL;
ZBX_GET_CONFIG_VAR(int, zbx_threads_num, 0)
ZBX_GET_CONFIG_VAR(ZBX_THREAD_HANDLE*, zbx_threads, NULL)
static int *threads_flags;
ZBX_GET_CONFIG_VAR(unsigned char, zbx_program_type, ZBX_PROGRAM_TYPE_AGENTD)
ZBX_GET_CONFIG_VAR2(const char *, const char *, zbx_progname, NULL)
ZBX_GET_CONFIG_VAR(int, zbx_config_timeout, 3)
static zbx_thread_activechk_args *config_active_args = NULL;
static int config_forks[ZBX_PROCESS_TYPE_COUNT] = {
0, /* ZBX_PROCESS_TYPE_POLLER */
0, /* ZBX_PROCESS_TYPE_UNREACHABLE */
0, /* ZBX_PROCESS_TYPE_IPMIPOLLER */
0, /* ZBX_PROCESS_TYPE_PINGER */
0, /* ZBX_PROCESS_TYPE_JAVAPOLLER */
0, /* ZBX_PROCESS_TYPE_HTTPPOLLER */
0, /* ZBX_PROCESS_TYPE_TRAPPER */
0, /* ZBX_PROCESS_TYPE_SNMPTRAPPER */
0, /* ZBX_PROCESS_TYPE_PROXYPOLLER */
0, /* ZBX_PROCESS_TYPE_ESCALATOR */
0, /* ZBX_PROCESS_TYPE_HISTSYNCER */
0, /* ZBX_PROCESS_TYPE_DISCOVERER */
0, /* ZBX_PROCESS_TYPE_ALERTER */
0, /* ZBX_PROCESS_TYPE_TIMER */
0, /* ZBX_PROCESS_TYPE_HOUSEKEEPER */
0, /* ZBX_PROCESS_TYPE_DATASENDER */
0, /* ZBX_PROCESS_TYPE_CONFSYNCER */
0, /* ZBX_PROCESS_TYPE_SELFMON */
0, /* ZBX_PROCESS_TYPE_VMWARE */
1, /* ZBX_PROCESS_TYPE_COLLECTOR */
10, /* ZBX_PROCESS_TYPE_LISTENER */
0, /* ZBX_PROCESS_TYPE_ACTIVE_CHECKS */
0, /* ZBX_PROCESS_TYPE_TASKMANAGER */
0, /* ZBX_PROCESS_TYPE_IPMIMANAGER */
0, /* ZBX_PROCESS_TYPE_ALERTMANAGER */
0, /* ZBX_PROCESS_TYPE_PREPROCMAN */
0, /* ZBX_PROCESS_TYPE_PREPROCESSOR */
0, /* ZBX_PROCESS_TYPE_LLDMANAGER */
0, /* ZBX_PROCESS_TYPE_LLDWORKER */
0, /* ZBX_PROCESS_TYPE_ALERTSYNCER */
0, /* ZBX_PROCESS_TYPE_HISTORYPOLLER */
0, /* ZBX_PROCESS_TYPE_AVAILMAN */
0, /* ZBX_PROCESS_TYPE_REPORTMANAGER */
0, /* ZBX_PROCESS_TYPE_REPORTWRITER */
0, /* ZBX_PROCESS_TYPE_SERVICEMAN */
0, /* ZBX_PROCESS_TYPE_TRIGGERHOUSEKEEPER */
0, /* ZBX_PROCESS_TYPE_ODBCPOLLER */
0, /* ZBX_PROCESS_TYPE_CONNECTORMANAGER */
0, /* ZBX_PROCESS_TYPE_CONNECTORWORKER*/
0, /* ZBX_PROCESS_TYPE_DISCOVERYMANAGER */
0, /* ZBX_PROCESS_TYPE_HTTPAGENT_POLLER */
0, /* ZBX_PROCESS_TYPE_AGENT_POLLER */
0, /* ZBX_PROCESS_TYPE_SNMP_POLLER */
0, /* ZBX_PROCESS_TYPE_INTERNAL_POLLER */
0, /* ZBX_PROCESS_TYPE_DBCONFIGWORKER */
0, /* ZBX_PROCESS_TYPE_PG_MANAGER */
0, /* ZBX_PROCESS_TYPE_BROWSERPOLLER */
0 /* ZBX_PROCESS_TYPE_HA_MANAGER */
};
static char *config_file = NULL;
static int config_allow_root = 0;
static zbx_config_log_t log_file_cfg = {NULL, NULL, ZBX_LOG_TYPE_UNDEFINED, 1};
#ifdef _WINDOWS
void zbx_co_uninitialize();
#endif
void zbx_free_service_resources(int ret);
static int get_process_info_by_thread(int local_server_num, unsigned char *local_process_type,
int *local_process_num)
{
int server_count = 0;
if (0 == local_server_num)
{
/* fail if the main process is queried */
return FAIL;
}
else if (local_server_num <= (server_count += config_forks[ZBX_PROCESS_TYPE_COLLECTOR]))
{
*local_process_type = ZBX_PROCESS_TYPE_COLLECTOR;
*local_process_num = local_server_num - server_count + config_forks[ZBX_PROCESS_TYPE_COLLECTOR];
}
else if (local_server_num <= (server_count += config_forks[ZBX_PROCESS_TYPE_LISTENER]))
{
*local_process_type = ZBX_PROCESS_TYPE_LISTENER;
*local_process_num = local_server_num - server_count + config_forks[ZBX_PROCESS_TYPE_LISTENER];
}
else if (local_server_num <= (server_count += config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS]))
{
*local_process_type = ZBX_PROCESS_TYPE_ACTIVE_CHECKS;
*local_process_num = local_server_num - server_count + config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS];
}
else
return FAIL;
return SUCCEED;
}
static int parse_commandline(int argc, char **argv, ZBX_TASK_EX *t)
{
int ret = SUCCEED;
char ch;
#ifdef _WINDOWS
unsigned int opt_mask = 0;
#endif
unsigned short opt_count[256] = {0};
/* see description of 'optarg' in 'man 3 getopt' */
char *zbx_optarg = NULL;
/* see description of 'optind' in 'man 3 getopt' */
int zbx_optind = 0;
t->task = ZBX_TASK_START;
#ifdef _WINDOWS
t->flags |= ZBX_TASK_FLAG_SERVICE_ENABLED | ZBX_TASK_FLAG_SERVICE_AUTOSTART;
#endif
/* parse the command-line */
while ((char)EOF != (ch = (char)zbx_getopt_long(argc, argv, shortopts, longopts, NULL, &zbx_optarg,
&zbx_optind)))
{
opt_count[(unsigned char)ch]++;
switch (ch)
{
case 'c':
if (NULL == config_file)
config_file = strdup(zbx_optarg);
break;
#ifndef _WINDOWS
case 'R':
if (SUCCEED != zbx_parse_rtc_options(zbx_optarg, &t->data))
exit(EXIT_FAILURE);
t->task = ZBX_TASK_RUNTIME_CONTROL;
break;
#endif
case 'h':
t->task = ZBX_TASK_SHOW_HELP;
#ifdef _WINDOWS
goto cf_out;
#else
goto out;
#endif
case 'V':
t->task = ZBX_TASK_SHOW_VERSION;
goto out;
case 'p':
if (ZBX_TASK_START == t->task)
t->task = ZBX_TASK_PRINT_SUPPORTED;
break;
case 't':
if (ZBX_TASK_START == t->task)
{
t->task = ZBX_TASK_TEST_METRIC;
TEST_METRIC = strdup(zbx_optarg);
}
break;
case 'T':
t->task = ZBX_TASK_TEST_CONFIG;
break;
case 'f':
t->flags |= ZBX_TASK_FLAG_FOREGROUND;
break;
#ifdef _WINDOWS
case 'i':
t->task = ZBX_TASK_INSTALL_SERVICE;
break;
case 'd':
t->task = ZBX_TASK_UNINSTALL_SERVICE;
break;
case 's':
t->task = ZBX_TASK_START_SERVICE;
break;
case 'x':
t->task = ZBX_TASK_STOP_SERVICE;
break;
case 'm':
t->flags |= ZBX_TASK_FLAG_MULTIPLE_AGENTS;
break;
case 'S':
if (SUCCEED != zbx_service_startup_flags_set(zbx_optarg, &t->flags))
{
ret = FAIL;
goto out;
}
if (ZBX_TASK_INSTALL_SERVICE != t->task)
t->task = ZBX_TASK_SET_SERVICE_STARTUP_TYPE;
break;
#endif
default:
t->task = ZBX_TASK_SHOW_USAGE;
goto out;
}
}
#ifdef _WINDOWS
switch (t->task)
{
case ZBX_TASK_START:
break;
case ZBX_TASK_INSTALL_SERVICE:
case ZBX_TASK_UNINSTALL_SERVICE:
case ZBX_TASK_START_SERVICE:
case ZBX_TASK_STOP_SERVICE:
case ZBX_TASK_SET_SERVICE_STARTUP_TYPE:
if (0 != (t->flags & ZBX_TASK_FLAG_FOREGROUND))
{
zbx_error("foreground option cannot be used with Zabbix agent services");
ret = FAIL;
goto out;
}
break;
default:
if (0 != (t->flags & ZBX_TASK_FLAG_MULTIPLE_AGENTS))
{
zbx_error("multiple agents option can be used only with Zabbix agent services");
ret = FAIL;
goto out;
}
}
#endif
/* every option may be specified only once */
for (int i = 0; NULL != longopts[i].name; i++)
{
ch = (char)longopts[i].val;
if ('h' == ch || 'V' == ch)
continue;
if (1 < opt_count[(unsigned char)ch])
{
if (NULL == strchr(shortopts, ch))
zbx_error("option \"--%s\" specified multiple times", longopts[i].name);
else
zbx_error("option \"-%c\" or \"--%s\" specified multiple times", ch, longopts[i].name);
ret = FAIL;
}
}
if (FAIL == ret)
goto out;
#ifdef _WINDOWS
/* check for mutually exclusive options */
/* Allowed option combinations. */
/* Option 'c' is always optional. */
/* S T p t i d s x m opt_mask */
/* ------------------------- -------- */
/* - - - - - - - - - 0x000 */
/* S - - - - - - - - 0x100 */
/* - T - - - - - - - 0x080 */
/* - - p - - - - - - 0x040 */
/* - - - t - - - - - 0x020 */
/* S - - - i - - - - 0x110 */
/* - - - - i - - - - 0x010 */
/* - - - - - d - - - 0x008 */
/* - - - - - - s - - 0x004 */
/* - - - - - - - x - 0x002 */
/* S - - - - - - - m 0x101 */
/* S - - - i - - - m 0x111 */
/* - - - - i - - - m 0x011 */
/* - - - - - d - - m 0x009 */
/* - - - - - - s - m 0x005 */
/* - - - - - - - x m 0x003 */
/* - - - - - - - - m 0x001 special case required for starting as a service with '-m' option */
if (0 < opt_count['S'])
opt_mask |= 0x100;
if (0 < opt_count['T'])
opt_mask |= 0x80;
if (0 < opt_count['p'])
opt_mask |= 0x40;
if (0 < opt_count['t'])
opt_mask |= 0x20;
if (0 < opt_count['i'])
opt_mask |= 0x10;
if (0 < opt_count['d'])
opt_mask |= 0x08;
if (0 < opt_count['s'])
opt_mask |= 0x04;
if (0 < opt_count['x'])
opt_mask |= 0x02;
if (0 < opt_count['m'])
opt_mask |= 0x01;
switch (opt_mask)
{
case 0x00:
case 0x01:
case 0x02:
case 0x03:
case 0x04:
case 0x05:
case 0x08:
case 0x09:
case 0x10:
case 0x11:
case 0x20:
case 0x40:
case 0x80:
case 0x100:
case 0x101:
case 0x110:
case 0x111:
break;
default:
zbx_error("mutually exclusive options used");
zbx_print_usage(zbx_progname, usage_message);
ret = FAIL;
goto out;
}
#else
/* check for mutually exclusive options */
if (1 < opt_count['p'] + opt_count['t'] + opt_count['T'] + opt_count['R'])
{
zbx_error("only one of options \"-p\" or \"--print\", \"-t\" or \"--test\","
"\"-T\" or \"--test-config\", \"-R\" or \"--runtime-control\" can be used");
ret = FAIL;
goto out;
}
#endif
/* Parameters which are not option values are invalid. The check relies on zbx_getopt_internal() which */
/* always permutes command line arguments regardless of POSIXLY_CORRECT environment variable. */
if (argc > zbx_optind)
{
for (int i = zbx_optind; i < argc; i++)
zbx_error("invalid parameter \"%s\"", argv[i]);
ret = FAIL;
goto out;
}
#ifdef _WINDOWS
#define PATH_BUF_LEN 4096
cf_out:
if (NULL == config_file)
{
char *ptr, *process_path = NULL;
wchar_t szProcessName[PATH_BUF_LEN];
if (0 == GetModuleFileNameEx(GetCurrentProcess(), NULL, szProcessName, ARRSIZE(szProcessName)))
{
zbx_error("failed to get Zabbix agent executable file path while initializing default config"
" path");
goto skip;
}
process_path = zbx_unicode_to_utf8(szProcessName);
if (NULL == (ptr = get_program_name(process_path)))
{
zbx_error("got unexpected Zabbix agent executable file path '%s' while initializing"
" default config path", ptr);
goto skip;
}
*ptr = '\0';
config_file = zbx_dsprintf(config_file, "%s%s", process_path, get_program_name(DEFAULT_CONFIG_FILE));
skip:
zbx_free(process_path);
}
#undef PATH_BUF_LEN
#endif
if (NULL == config_file)
config_file = zbx_strdup(NULL, DEFAULT_CONFIG_FILE);
out:
if (FAIL == ret)
{
zbx_free(TEST_METRIC);
zbx_free(config_file);
}
return ret;
}
/******************************************************************************
* *
* Purpose: sets configuration defaults *
* *
******************************************************************************/
static void set_defaults(void)
{
AGENT_RESULT result;
char **value = NULL;
if (NULL == zbx_config_hostnames)
{
if (NULL == config_hostname_item)
config_hostname_item = zbx_strdup(config_hostname_item, "system.hostname");
zbx_init_agent_result(&result);
if (SUCCEED == zbx_execute_agent_check(config_hostname_item, ZBX_PROCESS_LOCAL_COMMAND |
ZBX_PROCESS_WITH_ALIAS, &result, ZBX_CHECK_TIMEOUT_UNDEFINED) &&
NULL != (value = ZBX_GET_STR_RESULT(&result)))
{
assert(*value);
zbx_trim_str_list(*value, ',');
if (NULL == strchr(*value, ',') && ZBX_MAX_HOSTNAME_LEN < strlen(*value))
{
(*value)[ZBX_MAX_HOSTNAME_LEN] = '\0';
zabbix_log(LOG_LEVEL_WARNING, "hostname truncated to [%s])", *value);
}
zbx_config_hostnames = zbx_strdup(zbx_config_hostnames, *value);
}
else
zabbix_log(LOG_LEVEL_WARNING, "failed to get system hostname from [%s])", config_hostname_item);
zbx_free_agent_result(&result);
}
else if (NULL != config_hostname_item)
{
zabbix_log(LOG_LEVEL_WARNING, "both Hostname and HostnameItem defined, using [%s]",
zbx_config_hostnames);
}
if (NULL != zbx_config_host_metadata && NULL != zbx_config_host_metadata_item)
{
zabbix_log(LOG_LEVEL_WARNING, "both HostMetadata and HostMetadataItem defined, using [%s]",
zbx_config_host_metadata);
}
if (NULL != zbx_config_host_interface && NULL != zbx_config_host_interface_item)
{
zabbix_log(LOG_LEVEL_WARNING, "both HostInterface and HostInterfaceItem defined, using [%s]",
zbx_config_host_interface);
}
#ifndef _WINDOWS
if (NULL == config_load_module_path)
config_load_module_path = zbx_strdup(config_load_module_path, DEFAULT_LOAD_MODULE_PATH);
if (NULL == config_pid_file)
config_pid_file = (char *)"/tmp/zabbix_agentd.pid";
#endif
if (NULL == log_file_cfg.log_type_str)
log_file_cfg.log_type_str = zbx_strdup(log_file_cfg.log_type_str, ZBX_OPTION_LOGTYPE_FILE);
}
/******************************************************************************
* *
* Purpose: validates listed host names *
* *
******************************************************************************/
static void zbx_validate_config_hostnames(zbx_vector_str_t *hostnames)
{
if (0 == hostnames->values_num)
{
zabbix_log(LOG_LEVEL_CRIT, "\"Hostname\" configuration parameter is not defined");
exit(EXIT_FAILURE);
}
for (int i = 0; i < hostnames->values_num; i++)
{
char *ch_error;
if (FAIL == zbx_check_hostname(hostnames->values[i], &ch_error))
{
zabbix_log(LOG_LEVEL_CRIT, "invalid \"Hostname\" configuration parameter: '%s': %s",
hostnames->values[i], ch_error);
zbx_free(ch_error);
exit(EXIT_FAILURE);
}
}
}
/******************************************************************************
* *
* Purpose: validates configuration parameters *
* *
******************************************************************************/
static void zbx_validate_config(ZBX_TASK_EX *task)
{
int err = 0;
if (0 != config_forks[ZBX_PROCESS_TYPE_LISTENER])
{
char *ch_error;
if (NULL == zbx_config_hosts_allowed)
{
zabbix_log(LOG_LEVEL_CRIT, "StartAgents is not 0, parameter \"Server\" must be defined");
err = 1;
}
else if (SUCCEED != zbx_validate_peer_list(zbx_config_hosts_allowed, &ch_error))
{
zabbix_log(LOG_LEVEL_CRIT, "invalid entry in \"Server\" configuration parameter: %s", ch_error);
zbx_free(ch_error);
err = 1;
}
}
if (NULL != zbx_config_host_interface && HOST_INTERFACE_LEN < zbx_strlen_utf8(zbx_config_host_interface))
{
zabbix_log(LOG_LEVEL_CRIT, "the value of \"HostInterface\" configuration parameter cannot be longer"
" than %d characters", HOST_INTERFACE_LEN);
err = 1;
}
/* make sure active or passive check is enabled */
if (0 == config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS] && 0 == config_forks[ZBX_PROCESS_TYPE_LISTENER])
{
zabbix_log(LOG_LEVEL_CRIT, "either active or passive checks must be enabled");
err = 1;
}
if (NULL != zbx_config_source_ip && SUCCEED != zbx_is_supported_ip(zbx_config_source_ip))
{
zabbix_log(LOG_LEVEL_CRIT, "invalid \"SourceIP\" configuration parameter: '%s'", zbx_config_source_ip);
err = 1;
}
if (SUCCEED != zbx_validate_log_parameters(task, &log_file_cfg))
err = 1;
#if !(defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL))
err |= (FAIL == zbx_check_cfg_feature_str("TLSConnect", zbx_config_tls->connect, "TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSAccept", zbx_config_tls->accept, "TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCAFile", zbx_config_tls->ca_file, "TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCRLFile", zbx_config_tls->crl_file, "TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSServerCertIssuer", zbx_config_tls->server_cert_issuer,
"TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSServerCertSubject", zbx_config_tls->server_cert_subject,
"TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCertFile", zbx_config_tls->cert_file, "TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSKeyFile", zbx_config_tls->key_file, "TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSPSKIdentity", zbx_config_tls->psk_identity,
"TLS support"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSPSKFile", zbx_config_tls->psk_file, "TLS support"));
#endif
#if !(defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL))
err |= (FAIL == zbx_check_cfg_feature_str("TLSCipherCert", zbx_config_tls->cipher_cert,
"GnuTLS or OpenSSL"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCipherPSK", zbx_config_tls->cipher_psk,
"GnuTLS or OpenSSL"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCipherAll", zbx_config_tls->cipher_all,
"GnuTLS or OpenSSL"));
#endif
#if !defined(HAVE_OPENSSL)
err |= (FAIL == zbx_check_cfg_feature_str("TLSCipherCert13", zbx_config_tls->cipher_cert13,
"OpenSSL 1.1.1 or newer"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCipherPSK13", zbx_config_tls->cipher_psk13,
"OpenSSL 1.1.1 or newer"));
err |= (FAIL == zbx_check_cfg_feature_str("TLSCipherAll13", zbx_config_tls->cipher_all13,
"OpenSSL 1.1.1 or newer"));
#endif
if (0 != err)
exit(EXIT_FAILURE);
zbx_config_eventlog_max_lines_per_second = zbx_config_max_lines_per_second;
}
static int add_serveractive_host_cb(const zbx_vector_addr_ptr_t *addrs, zbx_vector_str_t *hostnames, void *data)
{
int forks, new_forks;
ZBX_UNUSED(data);
/* add at least one fork */
new_forks = 0 < hostnames->values_num ? hostnames->values_num : 1;
forks = config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS];
config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS] += new_forks;
config_active_args = (zbx_thread_activechk_args *)zbx_realloc(config_active_args,
sizeof(zbx_thread_activechk_args) * (size_t)config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS]);
for (int i = 0; i < new_forks; i++, forks++)
{
zbx_vector_addr_ptr_create(&config_active_args[forks].addrs);
zbx_addr_copy(&config_active_args[forks].addrs, addrs);
config_active_args[forks].zbx_config_tls = zbx_config_tls;
config_active_args[forks].zbx_get_program_type_cb_arg = get_zbx_program_type;
config_active_args[forks].config_file = config_file;
config_active_args[forks].config_timeout = zbx_config_timeout;
config_active_args[forks].config_source_ip = zbx_config_source_ip;
config_active_args[forks].config_listen_ip = zbx_config_listen_ip;
config_active_args[forks].config_listen_port = zbx_config_listen_port;
config_active_args[forks].config_hostname = zbx_config_hostname = zbx_strdup(NULL,
0 < hostnames->values_num ? hostnames->values[i] : "");
config_active_args[forks].config_host_metadata = zbx_config_host_metadata;
config_active_args[forks].config_host_metadata_item = zbx_config_host_metadata_item;
config_active_args[forks].config_heartbeat_frequency = zbx_config_heartbeat_frequency;
config_active_args[forks].config_host_interface = zbx_config_host_interface;
config_active_args[forks].config_host_interface_item = zbx_config_host_interface_item;
config_active_args[forks].config_buffer_send = zbx_config_buffer_send;
config_active_args[forks].config_buffer_size = zbx_config_buffer_size;
config_active_args[forks].config_eventlog_max_lines_per_second =
zbx_config_eventlog_max_lines_per_second;
config_active_args[forks].config_max_lines_per_second = zbx_config_max_lines_per_second;
config_active_args[forks].config_refresh_active_checks = zbx_config_refresh_active_checks;
}
return SUCCEED;
}
static void parse_hostnames(const char *hostname_param, zbx_vector_str_t *hostnames)
{
char *p2, *hostname;
const char *p1 = hostname_param;
if (NULL == hostname_param)
return;
do
{
if (NULL != (p2 = strchr(p1, ',')))
{
hostname = zbx_dsprintf(NULL, "%.*s", (int)(p2 - p1), p1);
p1 = p2 + 1;
}
else
hostname = zbx_strdup(NULL, p1);
if (FAIL != zbx_vector_str_search(hostnames, hostname, ZBX_DEFAULT_STR_COMPARE_FUNC))
{
zbx_error("error parsing the \"Hostname\" parameter: host \"%s\" specified more than"
" once", hostname);
zbx_free(hostname);
exit(EXIT_FAILURE);
}
zbx_vector_str_append(hostnames, hostname);
}
while (NULL != p2);
}
/******************************************************************************
* *
* Purpose: aliases EnableRemoteCommands parameter to *
* Allow/DenyKey=system.run[*] *
* *
* Parameters: value - [IN] key access rule parameter value *
* cfg - [IN] configuration parameter information *
* *
* Return value: SUCCEED - successful execution *
* FAIL - failed to add rule *
* *
******************************************************************************/
static int load_enable_remote_commands(const char *value, const zbx_cfg_line_t *cfg)
{
unsigned char rule_type;
char sysrun[] = "system.run[*]";
if (0 == strcmp(value, "1"))
rule_type = ZBX_KEY_ACCESS_ALLOW;
else if (0 == strcmp(value, "0"))
rule_type = ZBX_KEY_ACCESS_DENY;
else
return FAIL;
zabbix_log(LOG_LEVEL_WARNING, "EnableRemoteCommands parameter is deprecated,"
" use AllowKey=system.run[*] or DenyKey=system.run[*] instead");
return zbx_add_key_access_rule(cfg->parameter, sysrun, rule_type);
}
/******************************************************************************
* *
* Purpose: loads configuration from config file *
* *
* Parameters: requirement - [IN] produce error if config file missing or not *
* task - [IN/OUT] *
* *
******************************************************************************/
static void zbx_load_config(int requirement, ZBX_TASK_EX *task)
{
#define MIN_ACTIVE_CHECKS_REFRESH_FREQUENCY 1
#define MAX_ACTIVE_CHECKS_REFRESH_FREQUENCY SEC_PER_DAY
static char *active_hosts;
zbx_vector_str_t hostnames;
zbx_cfg_custom_parameter_parser_t parser_load_enable_remove_commands, parser_load_key_access_rule;
zbx_cfg_line_t cfg[] =
{
/* PARAMETER, VAR, TYPE,
MANDATORY, MIN, MAX */
{"Server", &zbx_config_hosts_allowed, ZBX_CFG_TYPE_STRING_LIST,
ZBX_CONF_PARM_OPT, 0, 0},
{"ServerActive", &active_hosts, ZBX_CFG_TYPE_STRING_LIST,
ZBX_CONF_PARM_OPT, 0, 0},
{"Hostname", &zbx_config_hostnames, ZBX_CFG_TYPE_STRING_LIST,
ZBX_CONF_PARM_OPT, 0, 0},
{"HostnameItem", &config_hostname_item, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"HostMetadata", &zbx_config_host_metadata, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"HostMetadataItem", &zbx_config_host_metadata_item, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"HostInterface", &zbx_config_host_interface, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"HostInterfaceItem", &zbx_config_host_interface_item, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"BufferSize", &zbx_config_buffer_size, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 2, 65535},
{"BufferSend", &zbx_config_buffer_send, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 1, SEC_PER_HOUR},
#ifndef _WINDOWS
{"PidFile", &config_pid_file, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
#endif
{"LogType", &log_file_cfg.log_type_str, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"LogFile", &log_file_cfg.log_file_name, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"LogFileSize", &log_file_cfg.log_file_size, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 1024},
{"Timeout", &zbx_config_timeout, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 1, 30},
{"ListenPort", &zbx_config_listen_port, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 1024, 32767},
{"ListenIP", &zbx_config_listen_ip, ZBX_CFG_TYPE_STRING_LIST,
ZBX_CONF_PARM_OPT, 0, 0},
{"SourceIP", &zbx_config_source_ip, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"DebugLevel", &config_log_level, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 5},
{"StartAgents", &config_forks[ZBX_PROCESS_TYPE_LISTENER],ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 100},
{"RefreshActiveChecks", &zbx_config_refresh_active_checks, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, MIN_ACTIVE_CHECKS_REFRESH_FREQUENCY,
MAX_ACTIVE_CHECKS_REFRESH_FREQUENCY},
{"MaxLinesPerSecond", &zbx_config_max_lines_per_second, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 1, 1000},
{"EnableRemoteCommands", &parser_load_enable_remove_commands, ZBX_CFG_TYPE_CUSTOM,
ZBX_CONF_PARM_OPT, 0, 1},
{"LogRemoteCommands", &zbx_config_log_remote_commands, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 1},
{"UnsafeUserParameters", &zbx_config_unsafe_user_parameters, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 1},
{"Alias", &config_aliases, ZBX_CFG_TYPE_MULTISTRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"UserParameter", &config_user_parameters, ZBX_CFG_TYPE_MULTISTRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"UserParameterDir", &config_user_parameter_dir, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
#ifndef _WINDOWS
{"LoadModulePath", &config_load_module_path, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"LoadModule", &config_load_module, ZBX_CFG_TYPE_MULTISTRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"AllowRoot", &config_allow_root, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 1},
{"User", &config_user, ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
#endif
#ifdef _WINDOWS
{"PerfCounter", &config_perf_counters, ZBX_CFG_TYPE_MULTISTRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"PerfCounterEn", &config_perf_counters_en, ZBX_CFG_TYPE_MULTISTRING,
ZBX_CONF_PARM_OPT, 0, 0},
#endif
{"TLSConnect", &(zbx_config_tls->connect), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSAccept", &(zbx_config_tls->accept), ZBX_CFG_TYPE_STRING_LIST,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCAFile", &(zbx_config_tls->ca_file), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCRLFile", &(zbx_config_tls->crl_file), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSServerCertIssuer", &(zbx_config_tls->server_cert_issuer), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSServerCertSubject", &(zbx_config_tls->server_cert_subject), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCertFile", &(zbx_config_tls->cert_file), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSKeyFile", &(zbx_config_tls->key_file), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSPSKIdentity", &(zbx_config_tls->psk_identity), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSPSKFile", &(zbx_config_tls->psk_file), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCipherCert13", &(zbx_config_tls->cipher_cert13), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCipherCert", &(zbx_config_tls->cipher_cert), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCipherPSK13", &(zbx_config_tls->cipher_psk13), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCipherPSK", &(zbx_config_tls->cipher_psk), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCipherAll13", &(zbx_config_tls->cipher_all13), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"TLSCipherAll", &(zbx_config_tls->cipher_all), ZBX_CFG_TYPE_STRING,
ZBX_CONF_PARM_OPT, 0, 0},
{"AllowKey", &parser_load_key_access_rule, ZBX_CFG_TYPE_CUSTOM,
ZBX_CONF_PARM_OPT, 0, 0},
{"DenyKey", &parser_load_key_access_rule, ZBX_CFG_TYPE_CUSTOM,
ZBX_CONF_PARM_OPT, 0, 0},
{"ListenBacklog", &config_tcp_max_backlog_size, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, INT_MAX},
{"HeartbeatFrequency", &zbx_config_heartbeat_frequency, ZBX_CFG_TYPE_INT,
ZBX_CONF_PARM_OPT, 0, 3600},
{0}
};
parser_load_enable_remove_commands.cfg_custom_parameter_parser_func = load_enable_remote_commands;
parser_load_key_access_rule.cfg_custom_parameter_parser_func = load_key_access_rule;
/* initialize multistrings */
zbx_strarr_init(&config_aliases);
zbx_strarr_init(&config_user_parameters);
#ifndef _WINDOWS
zbx_strarr_init(&config_load_module);
#endif
#ifdef _WINDOWS
zbx_strarr_init(&config_perf_counters);
zbx_strarr_init(&config_perf_counters_en);
#endif
zbx_parse_cfg_file(config_file, cfg, requirement, ZBX_CFG_STRICT, ZBX_CFG_EXIT_FAILURE, ZBX_CFG_ENVVAR_USE);
zbx_finalize_key_access_rules_configuration();
set_defaults();
log_file_cfg.log_type = zbx_get_log_type(log_file_cfg.log_type_str);
zbx_vector_str_create(&hostnames);
parse_hostnames(zbx_config_hostnames, &hostnames);
if (NULL != active_hosts && '\0' != *active_hosts)
{
char *error;
if (FAIL == zbx_set_data_destination_hosts(active_hosts, ZBX_DEFAULT_SERVER_PORT, "ServerActive",
add_serveractive_host_cb, &hostnames, NULL, &error))
{
zbx_error("%s", error);
exit(EXIT_FAILURE);
}
}
zbx_free(active_hosts);
if (ZBX_CFG_FILE_REQUIRED == requirement)
{
zbx_validate_config_hostnames(&hostnames);
zbx_validate_config(task);
#if defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)
zbx_tls_validate_config(zbx_config_tls, config_forks[ZBX_PROCESS_TYPE_ACTIVE_CHECKS],
config_forks[ZBX_PROCESS_TYPE_LISTENER], get_zbx_program_type);
#endif
}
zbx_vector_str_clear_ext(&hostnames, zbx_str_free);
zbx_vector_str_destroy(&hostnames);
#undef MIN_ACTIVE_CHECKS_REFRESH_FREQUENCY
#undef MAX_ACTIVE_CHECKS_REFRESH_FREQUENCY
}
/******************************************************************************
* *
* Purpose: frees configuration memory *
* *
******************************************************************************/
static void zbx_free_config(void)
{
zbx_strarr_free(&config_aliases);
zbx_strarr_free(&config_user_parameters);
#ifndef _WINDOWS
zbx_strarr_free(&config_load_module);
#endif
#ifdef _WINDOWS
zbx_strarr_free(&config_perf_counters);
zbx_strarr_free(&config_perf_counters_en);
#endif
}
#if defined(ZABBIX_DAEMON)
/******************************************************************************
* *
* Purpose: callback function for providing PID file path to libraries *
* *
******************************************************************************/
static const char *get_pid_file_path(void)
{
return config_pid_file;
}
#endif
#ifdef _WINDOWS
static int zbx_exec_service_task(const char *name, const ZBX_TASK_EX *t)
{
int ret;
switch (t->task)
{
case ZBX_TASK_INSTALL_SERVICE:
ret = ZabbixCreateService(name, config_file, t->flags);
break;
case ZBX_TASK_UNINSTALL_SERVICE:
ret = ZabbixRemoveService();
break;
case ZBX_TASK_START_SERVICE:
ret = ZabbixStartService();
break;
case ZBX_TASK_STOP_SERVICE:
ret = ZabbixStopService();
break;
case ZBX_TASK_SET_SERVICE_STARTUP_TYPE:
ret = zbx_service_startup_type_change(t->flags);
break;
default:
/* there can not be other choice */
zbx_this_should_never_happen_backtrace();
assert(0);
}
return ret;
}
#endif /* _WINDOWS */
typedef struct
{
zbx_socket_t *listen_sock;
}
zbx_on_exit_args_t;
static void zbx_on_exit(int ret, void *on_exit_args)
{
#ifdef _WINDOWS
ZBX_UNUSED(on_exit_args);
#endif
zabbix_log(LOG_LEVEL_DEBUG, "zbx_on_exit() called with ret:%d", ret);
#ifndef _WINDOWS
if (NULL != on_exit_args)
{
zbx_on_exit_args_t *args = (zbx_on_exit_args_t *)on_exit_args;
if (NULL != args->listen_sock)
zbx_tcp_unlisten(args->listen_sock);
}
#endif
zbx_free_service_resources(ret);
#if defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)
zbx_tls_free();
zbx_tls_library_deinit(ZBX_TLS_INIT_THREADS); /* deinitialize crypto library from parent thread */
#endif
zbx_config_tls_free(zbx_config_tls);
zbx_setproctitle_deinit();
#ifdef _WINDOWS
while (0 == WSACleanup())
;
#endif
exit(EXIT_SUCCESS);
}
#ifdef ZABBIX_DAEMON
static void signal_redirect_cb(int flags, zbx_signal_handler_f sigusr_handler)
{
#ifdef HAVE_SIGQUEUE
int scope;
switch (ZBX_RTC_GET_MSG(flags))
{
case ZBX_RTC_LOG_LEVEL_INCREASE:
case ZBX_RTC_LOG_LEVEL_DECREASE:
scope = ZBX_RTC_GET_SCOPE(flags);
if ((ZBX_RTC_LOG_SCOPE_FLAG | ZBX_RTC_LOG_SCOPE_PID) == scope)
{
zbx_signal_process_by_pid(ZBX_RTC_GET_DATA(flags), flags, NULL);
}
else
{
if (scope < ZBX_PROCESS_TYPE_COUNT)
{
zbx_signal_process_by_type(ZBX_RTC_GET_SCOPE(flags), ZBX_RTC_GET_DATA(flags),
flags, NULL);
}
}
/* call custom sigusr handler to handle log level changes for non worker processes */
if (NULL != sigusr_handler)
sigusr_handler(flags);
break;
case ZBX_RTC_USER_PARAMETERS_RELOAD:
zbx_signal_process_by_type(ZBX_PROCESS_TYPE_ACTIVE_CHECKS, ZBX_RTC_GET_DATA(flags), flags,
NULL);
zbx_signal_process_by_type(ZBX_PROCESS_TYPE_LISTENER, ZBX_RTC_GET_DATA(flags), flags,
NULL);
break;
default:
if (NULL != sigusr_handler)
sigusr_handler(flags);
}
#endif
}
#endif
#ifndef _WINDOWS
static int wait_for_children(const ZBX_THREAD_HANDLE *pids, size_t pids_num)
{
int ws;
pid_t pid;
pid = wait(&ws);
if (-1 == pid)
{
if (EINTR != errno)
{
zabbix_log(LOG_LEVEL_ERR, "failed to wait on child processes: %s", zbx_strerror(errno));
zbx_set_exiting_with_fail();
return FAIL;
}
return SUCCEED;
}
if (FAIL == zbx_is_child_pid(pid, pids, pids_num))
return SUCCEED;
return FAIL;
}
#endif
int MAIN_ZABBIX_ENTRY(int flags)
{
zbx_socket_t listen_sock = {0};
zbx_on_exit_args_t exit_args = {NULL};
char *error = NULL;
int i, j = 0, ret = SUCCEED;
#ifdef _WINDOWS
DWORD res;
#ifdef _M_X64
if (NULL == AddVectoredExceptionHandler(0, (PVECTORED_EXCEPTION_HANDLER)&zbx_win_veh_handler))
zabbix_log(LOG_LEVEL_TRACE, "failed to register vectored exception handler");
#endif /* _M_X64 */
#endif
if (0 != (flags & ZBX_TASK_FLAG_FOREGROUND))
{
printf("Starting Zabbix Agent [%s]. Zabbix %s (revision %s).\nPress Ctrl+C to exit.\n\n",
zbx_config_hostnames, ZABBIX_VERSION, ZABBIX_REVISION);
}
#ifndef _WINDOWS
if (SUCCEED != zbx_locks_create(&error))
{
zbx_error("cannot create locks: %s", error);
zbx_free(error);
exit(EXIT_FAILURE);
}
#endif
if (SUCCEED != zbx_open_log(&log_file_cfg, config_log_level, syslog_app_name, zabbix_event_source, &error))
{
zbx_error("cannot open log: %s", error);
zbx_free(error);
exit(EXIT_FAILURE);
}
#ifdef HAVE_IPV6
# define IPV6_FEATURE_STATUS "YES"
#else
# define IPV6_FEATURE_STATUS " NO"
#endif
#if defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)
# define TLS_FEATURE_STATUS "YES"
#else
# define TLS_FEATURE_STATUS " NO"
#endif
zabbix_log(LOG_LEVEL_INFORMATION, "Starting Zabbix Agent [%s]. Zabbix %s (revision %s).",
zbx_config_hostnames, ZABBIX_VERSION, ZABBIX_REVISION);
zabbix_log(LOG_LEVEL_INFORMATION, "**** Enabled features ****");
zabbix_log(LOG_LEVEL_INFORMATION, "IPv6 support: " IPV6_FEATURE_STATUS);
zabbix_log(LOG_LEVEL_INFORMATION, "TLS support: " TLS_FEATURE_STATUS);
zabbix_log(LOG_LEVEL_INFORMATION, "**************************");
zabbix_log(LOG_LEVEL_INFORMATION, "using configuration file: %s", config_file);
#if !defined(_WINDOWS) && (defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL))
if (SUCCEED != zbx_coredump_disable())
{
zabbix_log(LOG_LEVEL_CRIT, "cannot disable core dump, exiting...");
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
#endif
#ifndef _WINDOWS
if (FAIL == zbx_load_modules(config_load_module_path, config_load_module, zbx_config_timeout, 1))
{
zabbix_log(LOG_LEVEL_CRIT, "loading modules failed, exiting...");
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
#endif
if (FAIL == load_user_parameters(config_user_parameters, &error))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot load user parameters: %s", error);
zbx_free(error);
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
if (0 != config_forks[ZBX_PROCESS_TYPE_LISTENER])
{
#ifndef _WINDOWS
exit_args.listen_sock = &listen_sock;
zbx_set_on_exit_args(&exit_args);
#endif
if (FAIL == zbx_tcp_listen(&listen_sock, zbx_config_listen_ip, (unsigned short)zbx_config_listen_port,
zbx_config_timeout, config_tcp_max_backlog_size))
{
zabbix_log(LOG_LEVEL_CRIT, "listener failed: %s", zbx_socket_strerror());
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
}
if (SUCCEED != zbx_init_modbus(&error))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot initialize modbus: %s", error);
zbx_free(error);
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
if (SUCCEED != zbx_init_collector_data(&error))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot initialize collector: %s", error);
zbx_free(error);
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
#ifdef _WINDOWS
if (SUCCEED != zbx_init_perf_collector(ZBX_MULTI_THREADED, &error))
{
zabbix_log(LOG_LEVEL_WARNING, "cannot initialize performance counter collector: %s", error);
zbx_free(error);
}
else
load_perf_counters(config_perf_counters, config_perf_counters_en);
#endif
zbx_free_config();
#if defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)
zbx_tls_init_parent(get_zbx_program_type);
#endif
/* --- START THREADS ---*/
for (zbx_threads_num = 0, i = 0; i < ZBX_PROCESS_TYPE_COUNT; i++)
zbx_threads_num += config_forks[i];
#ifdef _WINDOWS
if (MAXIMUM_WAIT_OBJECTS < zbx_threads_num)
{
zabbix_log(LOG_LEVEL_CRIT, "Too many agent threads. Please reduce the StartAgents configuration"
" parameter or the number of active servers in ServerActive configuration parameter.");
zbx_free_service_resources(FAIL);
exit(EXIT_FAILURE);
}
#endif
zbx_threads = (ZBX_THREAD_HANDLE *)zbx_calloc(zbx_threads, (size_t)zbx_threads_num, sizeof(ZBX_THREAD_HANDLE));
threads_flags = (int *)zbx_calloc(threads_flags, (size_t)zbx_threads_num, sizeof(int));
zabbix_log(LOG_LEVEL_INFORMATION, "agent #0 started [main process]");
for (i = 0; i < zbx_threads_num; i++)
{
zbx_thread_args_t *thread_args;
zbx_thread_info_t *thread_info;
zbx_thread_listener_args listener_args = {&listen_sock, zbx_config_tls, get_zbx_program_type,
config_file, zbx_config_timeout,
zbx_config_hosts_allowed};
thread_args = (zbx_thread_args_t *)zbx_malloc(NULL, sizeof(zbx_thread_args_t));
thread_info = &thread_args->info;
if (FAIL == get_process_info_by_thread(i + 1, &thread_info->process_type, &thread_info->process_num))
{
THIS_SHOULD_NEVER_HAPPEN;
exit(EXIT_FAILURE);
}
thread_info->program_type = zbx_program_type;
thread_info->server_num = i + 1;
thread_args->args = NULL;
switch (thread_info->process_type)
{
case ZBX_PROCESS_TYPE_COLLECTOR:
zbx_thread_start(zbx_collector_thread, thread_args, &zbx_threads[i]);
break;
case ZBX_PROCESS_TYPE_LISTENER:
thread_args->args = &listener_args;
zbx_thread_start(listener_thread, thread_args, &zbx_threads[i]);
break;
case ZBX_PROCESS_TYPE_ACTIVE_CHECKS:
thread_args->args = &config_active_args[j++];
zbx_thread_start(active_checks_thread, thread_args, &zbx_threads[i]);
break;
}
#ifndef _WINDOWS
zbx_free(thread_args);
#endif
}
#ifdef _WINDOWS
zbx_set_parent_signal_handler(zbx_on_exit); /* must be called after all threads are created */
/* wait for an exiting thread */
res = WaitForMultipleObjectsEx(zbx_threads_num, zbx_threads, FALSE, INFINITE, FALSE);
if (ZBX_IS_RUNNING())
{
/* Zabbix agent service should either be stopped by the user in ServiceCtrlHandler() or */
/* crash. If some thread has terminated normally, it means something is terribly wrong. */
zabbix_log(LOG_LEVEL_CRIT, "One thread has terminated unexpectedly (code:%lu). Exiting ...", res);
THIS_SHOULD_NEVER_HAPPEN;
/* notify other threads and allow them to terminate */
ZBX_DO_EXIT();
zbx_sleep(1);
}
else
{
zbx_tcp_close(&listen_sock);
/* Wait for the service worker thread to terminate us. Listener threads may not exit up to */
/* config_timeout seconds if they're waiting for external processes to finish / timeout */
zbx_sleep(zbx_config_timeout);
THIS_SHOULD_NEVER_HAPPEN;
}
#else
zbx_set_child_pids(zbx_threads, zbx_threads_num);
zbx_unset_exit_on_terminate();
while (ZBX_IS_RUNNING() && SUCCEED == wait_for_children(zbx_threads, zbx_threads_num))
;
zbx_log_exit_signal();
ret = ZBX_EXIT_STATUS();
#endif
zbx_on_exit(ret, &exit_args);
return SUCCEED;
}
/******************************************************************************
* *
* Purpose: frees service resources allocated by main thread *
* *
******************************************************************************/
void zbx_free_service_resources(int ret)
{
if (NULL != zbx_threads)
{
/* wait for all child processes to exit */
zbx_threads_kill_and_wait(zbx_threads, threads_flags, zbx_threads_num, ret);
zbx_free(zbx_threads);
zbx_free(threads_flags);
}
#ifdef HAVE_PTHREAD_PROCESS_SHARED
zbx_locks_disable();
#endif
zbx_free_metrics();
zbx_alias_list_free();
zbx_free_collector_data();
zbx_deinit_modbus();
#ifdef _WINDOWS
zbx_free_perf_collector();
zbx_co_uninitialize();
#endif
#ifndef _WINDOWS
zbx_unload_modules();
#endif
zabbix_log(LOG_LEVEL_INFORMATION, "Zabbix Agent stopped. Zabbix %s (revision %s).",
ZABBIX_VERSION, ZABBIX_REVISION);
zbx_close_log();
#ifndef _WINDOWS
zbx_locks_destroy();
#endif
}
int main(int argc, char **argv)
{
ZBX_TASK_EX t = {ZBX_TASK_START, 0, 0, NULL};
char *error = NULL;
#ifdef _WINDOWS
int ret;
#endif
argv = zbx_setproctitle_init(argc, argv);
zbx_progname = get_program_name(argv[0]);
zbx_init_library_common(zbx_log_impl, get_zbx_progname, zbx_backtrace);
zbx_init_library_sysinfo(get_zbx_config_timeout, get_zbx_config_enable_remote_commands,
get_zbx_config_log_remote_commands, get_zbx_config_unsafe_user_parameters,
get_zbx_config_source_ip, get_zbx_config_hostname, get_zbx_config_hostnames,
get_zbx_config_host_metadata, get_zbx_config_host_metadata_item, get_zbx_service_name);
#if defined(_WINDOWS) || defined(__MINGW32__)
zbx_init_library_win32(get_zbx_progname);
#else
zbx_init_library_nix(get_zbx_progname, get_process_info_by_thread);
#endif
#ifdef _WINDOWS
/* Provide, so our process handles errors instead of the system itself. */
/* Attention!!! */
/* The system does not display the critical-error-handler message box. */
/* Instead, the system sends the error to the calling process.*/
SetErrorMode(SEM_FAILCRITICALERRORS);
#endif
zbx_config_tls = zbx_config_tls_new();
if (SUCCEED != parse_commandline(argc, argv, &t))
exit(EXIT_FAILURE);
#ifdef _WINDOWS
/* if agent is started as windows service then try to log errors */
/* into windows event log while zabbix_log is not ready */
if (ZBX_TASK_START == t.task && 0 == (t.flags & ZBX_TASK_FLAG_FOREGROUND))
{
zbx_config_log_t log_cfg = {NULL, NULL, ZBX_LOG_TYPE_SYSTEM, 1};
zbx_open_log(&log_cfg, LOG_LEVEL_WARNING, syslog_app_name, zabbix_event_source, NULL);
}
#endif
#if defined(_WINDOWS) || defined(__MINGW32__)
zbx_import_symbols();
#endif
#ifdef _WINDOWS
if (ZBX_TASK_SHOW_USAGE != t.task && ZBX_TASK_SHOW_VERSION != t.task && ZBX_TASK_SHOW_HELP != t.task &&
ZBX_TASK_TEST_CONFIG != t.task && SUCCEED != zbx_socket_start(&error))
{
zabbix_log(LOG_LEVEL_CRIT, error);
zbx_free(error);
exit(EXIT_FAILURE);
}
#endif
zbx_init_library_cfg(zbx_program_type, config_file);
/* this is needed to set default hostname in zbx_load_config() */
zbx_init_metrics();
switch (t.task)
{
case ZBX_TASK_SHOW_USAGE:
zbx_print_usage(zbx_progname, usage_message);
exit(EXIT_FAILURE);
break;
#ifndef _WINDOWS
case ZBX_TASK_RUNTIME_CONTROL:
zbx_load_config(ZBX_CFG_FILE_REQUIRED, &t);
exit(SUCCEED == zbx_sigusr_send(t.data, config_pid_file) ? EXIT_SUCCESS : EXIT_FAILURE);
break;
#else
case ZBX_TASK_INSTALL_SERVICE:
case ZBX_TASK_UNINSTALL_SERVICE:
case ZBX_TASK_START_SERVICE:
case ZBX_TASK_STOP_SERVICE:
case ZBX_TASK_SET_SERVICE_STARTUP_TYPE:
if (t.flags & ZBX_TASK_FLAG_MULTIPLE_AGENTS)
{
char *p, *first_hostname;
zbx_load_config(ZBX_CFG_FILE_REQUIRED, &t);
first_hostname = NULL != (p = strchr(zbx_config_hostnames, ',')) ? zbx_dsprintf(NULL,
"%.*s", (int)(p - zbx_config_hostnames), zbx_config_hostnames) :
zbx_strdup(NULL, zbx_config_hostnames);
zbx_snprintf(zabbix_service_name, sizeof(zabbix_service_name), "%s [%s]",
APPLICATION_NAME, first_hostname);
zbx_snprintf(zabbix_event_source, sizeof(zabbix_event_source), "%s [%s]",
APPLICATION_NAME, first_hostname);
zbx_free(first_hostname);
}
else
zbx_load_config(ZBX_CFG_FILE_OPTIONAL, &t);
zbx_free_config();
zbx_service_init(get_zbx_service_name, get_zbx_event_source);
ret = zbx_exec_service_task(argv[0], &t);
while (0 == WSACleanup())
;
zbx_free_metrics();
exit(SUCCEED == ret ? EXIT_SUCCESS : EXIT_FAILURE);
break;
#endif
case ZBX_TASK_TEST_CONFIG:
printf("Validating configuration file \"%s\"\n", config_file);
zbx_load_config(ZBX_CFG_FILE_REQUIRED, &t);
load_aliases(config_aliases);
zbx_set_user_parameter_dir(config_user_parameter_dir);
if (FAIL == load_user_parameters(config_user_parameters, &error))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot load user parameters: %s", error);
zbx_free(error);
exit(EXIT_FAILURE);
}
zbx_free_metrics();
zbx_alias_list_free();
zbx_free_config();
printf("Validation successful\n");
exit(EXIT_SUCCESS);
case ZBX_TASK_TEST_METRIC:
case ZBX_TASK_PRINT_SUPPORTED:
zbx_load_config(ZBX_CFG_FILE_OPTIONAL, &t);
#ifdef _WINDOWS
if (SUCCEED != zbx_init_perf_collector(ZBX_SINGLE_THREADED, &error))
{
zabbix_log(LOG_LEVEL_WARNING, "cannot initialize performance counter collector: %s",
error);
zbx_free(error);
}
else
load_perf_counters(config_perf_counters, config_perf_counters_en);
#else
zbx_set_common_signal_handlers(zbx_on_exit);
#endif
#ifndef _WINDOWS
if (FAIL == zbx_load_modules(config_load_module_path, config_load_module, zbx_config_timeout,
0))
{
zabbix_log(LOG_LEVEL_CRIT, "loading modules failed, exiting...");
exit(EXIT_FAILURE);
}
#endif
zbx_set_user_parameter_dir(config_user_parameter_dir);
if (FAIL == load_user_parameters(config_user_parameters, &error))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot load user parameters: %s", error);
zbx_free(error);
exit(EXIT_FAILURE);
}
load_aliases(config_aliases);
zbx_free_config();
if (ZBX_TASK_TEST_METRIC == t.task)
zbx_test_parameter(TEST_METRIC);
else
zbx_test_parameters();
#ifdef _WINDOWS
zbx_free_perf_collector(); /* cpu_collector must be freed before perf_collector is freed */
while (0 == WSACleanup())
;
zbx_co_uninitialize();
#endif
#ifndef _WINDOWS
zbx_unload_modules();
#endif
zbx_free_metrics();
zbx_alias_list_free();
exit(EXIT_SUCCESS);
break;
case ZBX_TASK_SHOW_VERSION:
zbx_print_version(title_message);
#if defined(HAVE_GNUTLS) || defined(HAVE_OPENSSL)
printf("\n");
zbx_tls_version();
#endif
#ifdef _AIX
printf("\n");
tl_version();
#endif
exit(EXIT_SUCCESS);
break;
case ZBX_TASK_SHOW_HELP:
zbx_print_help(zbx_progname, help_message, usage_message, config_file);
exit(EXIT_SUCCESS);
break;
default:
zbx_load_config(ZBX_CFG_FILE_REQUIRED, &t);
zbx_set_user_parameter_dir(config_user_parameter_dir);
load_aliases(config_aliases);
#ifdef _WINDOWS
if (0 == (t.flags & ZBX_TASK_FLAG_FOREGROUND))
zbx_close_log();
#endif
break;
}
#if defined(ZABBIX_SERVICE)
zbx_service_init(get_zbx_service_name, get_zbx_event_source);
zbx_service_start(t.flags);
#elif defined(ZABBIX_DAEMON)
zbx_daemon_start(config_allow_root, config_user, t.flags, get_pid_file_path, zbx_on_exit,
log_file_cfg.log_type, log_file_cfg.log_file_name, signal_redirect_cb, get_zbx_threads,
get_zbx_threads_num);
#endif
exit(EXIT_SUCCESS);
}