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nagios4/base/nagios.c

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/*****************************************************************************
*
* NAGIOS.C - Core Program Code For Nagios
*
* Program: Nagios Core
* Version: 3.5.1
* License: GPL
* Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors
* Copyright (c) 1999-2009 Ethan Galstad
*
* First Written: 01-28-1999 (start of development)
* Last Modified:
*
* Description:
*
* Nagios is a network monitoring tool that will check hosts and services
* that you specify. It has the ability to notify contacts via email, pager,
* or other user-defined methods when a service or host goes down and
* recovers. Service and host monitoring is done through the use of external
* plugins which can be developed independently of Nagios.
*
* License:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*****************************************************************************/
#include "../include/config.h"
#include "../include/common.h"
#include "../include/objects.h"
#include "../include/comments.h"
#include "../include/downtime.h"
#include "../include/statusdata.h"
#include "../include/macros.h"
#include "../include/nagios.h"
#include "../include/sretention.h"
#include "../include/perfdata.h"
#include "../include/broker.h"
#include "../include/nebmods.h"
#include "../include/nebmodules.h"
/*#define DEBUG_MEMORY 1*/
#ifdef DEBUG_MEMORY
#include <mcheck.h>
#endif
char *config_file = NULL;
char *log_file = NULL;
char *command_file = NULL;
char *temp_file = NULL;
char *temp_path = NULL;
char *check_result_path = NULL;
char *lock_file = NULL;
char *log_archive_path = NULL;
char *p1_file = NULL; /**** EMBEDDED PERL ****/
char *auth_file = NULL; /**** EMBEDDED PERL INTERPRETER AUTH FILE ****/
char *nagios_user = NULL;
char *nagios_group = NULL;
char *global_host_event_handler = NULL;
char *global_service_event_handler = NULL;
command *global_host_event_handler_ptr = NULL;
command *global_service_event_handler_ptr = NULL;
char *ocsp_command = NULL;
char *ochp_command = NULL;
command *ocsp_command_ptr = NULL;
command *ochp_command_ptr = NULL;
char *illegal_object_chars = NULL;
char *illegal_output_chars = NULL;
int use_regexp_matches = FALSE;
int use_true_regexp_matching = FALSE;
int use_syslog = DEFAULT_USE_SYSLOG;
int log_notifications = DEFAULT_NOTIFICATION_LOGGING;
int log_service_retries = DEFAULT_LOG_SERVICE_RETRIES;
int log_host_retries = DEFAULT_LOG_HOST_RETRIES;
int log_event_handlers = DEFAULT_LOG_EVENT_HANDLERS;
int log_initial_states = DEFAULT_LOG_INITIAL_STATES;
int log_external_commands = DEFAULT_LOG_EXTERNAL_COMMANDS;
int log_passive_checks = DEFAULT_LOG_PASSIVE_CHECKS;
unsigned long logging_options = 0;
unsigned long syslog_options = 0;
int service_check_timeout = DEFAULT_SERVICE_CHECK_TIMEOUT;
int service_check_timeout_state = STATE_CRITICAL;
int host_check_timeout = DEFAULT_HOST_CHECK_TIMEOUT;
int event_handler_timeout = DEFAULT_EVENT_HANDLER_TIMEOUT;
int notification_timeout = DEFAULT_NOTIFICATION_TIMEOUT;
int ocsp_timeout = DEFAULT_OCSP_TIMEOUT;
int ochp_timeout = DEFAULT_OCHP_TIMEOUT;
double sleep_time = DEFAULT_SLEEP_TIME;
int interval_length = DEFAULT_INTERVAL_LENGTH;
int service_inter_check_delay_method = ICD_SMART;
int host_inter_check_delay_method = ICD_SMART;
int service_interleave_factor_method = ILF_SMART;
int max_host_check_spread = DEFAULT_HOST_CHECK_SPREAD;
int max_service_check_spread = DEFAULT_SERVICE_CHECK_SPREAD;
int command_check_interval = DEFAULT_COMMAND_CHECK_INTERVAL;
int check_reaper_interval = DEFAULT_CHECK_REAPER_INTERVAL;
int max_check_reaper_time = DEFAULT_MAX_REAPER_TIME;
int service_freshness_check_interval = DEFAULT_FRESHNESS_CHECK_INTERVAL;
int host_freshness_check_interval = DEFAULT_FRESHNESS_CHECK_INTERVAL;
int auto_rescheduling_interval = DEFAULT_AUTO_RESCHEDULING_INTERVAL;
int check_external_commands = DEFAULT_CHECK_EXTERNAL_COMMANDS;
int check_orphaned_services = DEFAULT_CHECK_ORPHANED_SERVICES;
int check_orphaned_hosts = DEFAULT_CHECK_ORPHANED_HOSTS;
int check_service_freshness = DEFAULT_CHECK_SERVICE_FRESHNESS;
int check_host_freshness = DEFAULT_CHECK_HOST_FRESHNESS;
int auto_reschedule_checks = DEFAULT_AUTO_RESCHEDULE_CHECKS;
int auto_rescheduling_window = DEFAULT_AUTO_RESCHEDULING_WINDOW;
int additional_freshness_latency = DEFAULT_ADDITIONAL_FRESHNESS_LATENCY;
int check_for_updates = DEFAULT_CHECK_FOR_UPDATES;
int bare_update_check = DEFAULT_BARE_UPDATE_CHECK;
time_t last_update_check = 0L;
unsigned long update_uid = 0L;
int update_available = FALSE;
char *last_program_version = NULL;
char *new_program_version = NULL;
time_t last_command_check = 0L;
time_t last_command_status_update = 0L;
time_t last_log_rotation = 0L;
time_t last_program_stop = 0L;
int use_aggressive_host_checking = DEFAULT_AGGRESSIVE_HOST_CHECKING;
unsigned long cached_host_check_horizon = DEFAULT_CACHED_HOST_CHECK_HORIZON;
unsigned long cached_service_check_horizon = DEFAULT_CACHED_SERVICE_CHECK_HORIZON;
int enable_predictive_host_dependency_checks = DEFAULT_ENABLE_PREDICTIVE_HOST_DEPENDENCY_CHECKS;
int enable_predictive_service_dependency_checks = DEFAULT_ENABLE_PREDICTIVE_SERVICE_DEPENDENCY_CHECKS;
int soft_state_dependencies = FALSE;
int retain_state_information = FALSE;
int retention_update_interval = DEFAULT_RETENTION_UPDATE_INTERVAL;
int use_retained_program_state = TRUE;
int use_retained_scheduling_info = FALSE;
int retention_scheduling_horizon = DEFAULT_RETENTION_SCHEDULING_HORIZON;
unsigned long modified_host_process_attributes = MODATTR_NONE;
unsigned long modified_service_process_attributes = MODATTR_NONE;
unsigned long retained_host_attribute_mask = 0L;
unsigned long retained_service_attribute_mask = 0L;
unsigned long retained_contact_host_attribute_mask = 0L;
unsigned long retained_contact_service_attribute_mask = 0L;
unsigned long retained_process_host_attribute_mask = 0L;
unsigned long retained_process_service_attribute_mask = 0L;
unsigned long next_comment_id = 0L;
unsigned long next_downtime_id = 0L;
unsigned long next_event_id = 0L;
unsigned long next_problem_id = 0L;
unsigned long next_notification_id = 0L;
int log_rotation_method = LOG_ROTATION_NONE;
int sigshutdown = FALSE;
int sigrestart = FALSE;
char *sigs[35] = {"EXIT", "HUP", "INT", "QUIT", "ILL", "TRAP", "ABRT", "BUS", "FPE", "KILL", "USR1", "SEGV", "USR2", "PIPE", "ALRM", "TERM", "STKFLT", "CHLD", "CONT", "STOP", "TSTP", "TTIN", "TTOU", "URG", "XCPU", "XFSZ", "VTALRM", "PROF", "WINCH", "IO", "PWR", "UNUSED", "ZERR", "DEBUG", (char *)NULL};
int caught_signal = FALSE;
int sig_id = 0;
int restarting = FALSE;
int verify_config = FALSE;
int verify_object_relationships = TRUE;
int verify_circular_paths = TRUE;
int test_scheduling = FALSE;
int precache_objects = FALSE;
int use_precached_objects = FALSE;
int daemon_mode = FALSE;
int daemon_dumps_core = TRUE;
int max_parallel_service_checks = DEFAULT_MAX_PARALLEL_SERVICE_CHECKS;
int currently_running_service_checks = 0;
int currently_running_host_checks = 0;
time_t program_start = 0L;
time_t event_start = 0L;
int nagios_pid = 0;
int enable_notifications = TRUE;
int execute_service_checks = TRUE;
int accept_passive_service_checks = TRUE;
int execute_host_checks = TRUE;
int accept_passive_host_checks = TRUE;
int enable_event_handlers = TRUE;
int obsess_over_services = FALSE;
int obsess_over_hosts = FALSE;
int enable_failure_prediction = TRUE;
int translate_passive_host_checks = DEFAULT_TRANSLATE_PASSIVE_HOST_CHECKS;
int passive_host_checks_are_soft = DEFAULT_PASSIVE_HOST_CHECKS_SOFT;
int aggregate_status_updates = TRUE;
int status_update_interval = DEFAULT_STATUS_UPDATE_INTERVAL;
int time_change_threshold = DEFAULT_TIME_CHANGE_THRESHOLD;
unsigned long event_broker_options = BROKER_NOTHING;
int process_performance_data = DEFAULT_PROCESS_PERFORMANCE_DATA;
int enable_flap_detection = DEFAULT_ENABLE_FLAP_DETECTION;
double low_service_flap_threshold = DEFAULT_LOW_SERVICE_FLAP_THRESHOLD;
double high_service_flap_threshold = DEFAULT_HIGH_SERVICE_FLAP_THRESHOLD;
double low_host_flap_threshold = DEFAULT_LOW_HOST_FLAP_THRESHOLD;
double high_host_flap_threshold = DEFAULT_HIGH_HOST_FLAP_THRESHOLD;
int use_large_installation_tweaks = DEFAULT_USE_LARGE_INSTALLATION_TWEAKS;
int enable_environment_macros = TRUE;
int free_child_process_memory = -1;
int child_processes_fork_twice = -1;
int enable_embedded_perl = DEFAULT_ENABLE_EMBEDDED_PERL;
int use_embedded_perl_implicitly = DEFAULT_USE_EMBEDDED_PERL_IMPLICITLY;
int embedded_perl_initialized = FALSE;
int date_format = DATE_FORMAT_US;
char *use_timezone = NULL;
int allow_empty_hostgroup_assignment = DEFAULT_ALLOW_EMPTY_HOSTGROUP_ASSIGNMENT;
int command_file_fd;
FILE *command_file_fp;
int command_file_created = FALSE;
extern contact *contact_list;
extern contactgroup *contactgroup_list;
extern hostgroup *hostgroup_list;
extern command *command_list;
extern timeperiod *timeperiod_list;
extern serviceescalation *serviceescalation_list;
notification *notification_list;
check_result check_result_info;
check_result *check_result_list = NULL;
unsigned long max_check_result_file_age = DEFAULT_MAX_CHECK_RESULT_AGE;
dbuf check_result_dbuf;
circular_buffer external_command_buffer;
circular_buffer check_result_buffer;
pthread_t worker_threads[TOTAL_WORKER_THREADS];
int external_command_buffer_slots = DEFAULT_EXTERNAL_COMMAND_BUFFER_SLOTS;
check_stats check_statistics[MAX_CHECK_STATS_TYPES];
char *debug_file;
int debug_level = DEFAULT_DEBUG_LEVEL;
int debug_verbosity = DEFAULT_DEBUG_VERBOSITY;
unsigned long max_debug_file_size = DEFAULT_MAX_DEBUG_FILE_SIZE;
/* Following main() declaration required by older versions of Perl ut 5.00503 */
int main(int argc, char **argv, char **env) {
int result;
int error = FALSE;
char *buffer = NULL;
int display_license = FALSE;
int display_help = FALSE;
int c = 0;
struct tm *tm, tm_s;
time_t now;
char datestring[256];
nagios_macros *mac;
mac = get_global_macros();
#ifdef HAVE_GETOPT_H
int option_index = 0;
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"license", no_argument, 0, 'V'},
{"verify-config", no_argument, 0, 'v'},
{"daemon", no_argument, 0, 'd'},
{"test-scheduling", no_argument, 0, 's'},
{"dont-verify-objects", no_argument, 0, 'o'},
{"dont-verify-paths", no_argument, 0, 'x'},
{"precache-objects", no_argument, 0, 'p'},
{"use-precached-objects", no_argument, 0, 'u'},
{0, 0, 0, 0}
};
#endif
/* make sure we have the correct number of command line arguments */
if(argc < 2)
error = TRUE;
/* get all command line arguments */
while(1) {
#ifdef HAVE_GETOPT_H
c = getopt_long(argc, argv, "+hVvdsoxpu", long_options, &option_index);
#else
c = getopt(argc, argv, "+hVvdsoxpu");
#endif
if(c == -1 || c == EOF)
break;
switch(c) {
case '?': /* usage */
case 'h':
display_help = TRUE;
break;
case 'V': /* version */
display_license = TRUE;
break;
case 'v': /* verify */
verify_config = TRUE;
break;
case 's': /* scheduling check */
test_scheduling = TRUE;
break;
case 'd': /* daemon mode */
daemon_mode = TRUE;
break;
case 'o': /* don't verify objects */
/*
verify_object_relationships=FALSE;
*/
break;
case 'x': /* don't verify circular paths */
verify_circular_paths = FALSE;
break;
case 'p': /* precache object config */
precache_objects = TRUE;
break;
case 'u': /* use precached object config */
use_precached_objects = TRUE;
break;
default:
break;
}
}
/* make sure we have the right combination of arguments */
if(precache_objects == TRUE && (test_scheduling == FALSE && verify_config == FALSE)) {
error = TRUE;
display_help = TRUE;
}
#ifdef DEBUG_MEMORY
mtrace();
#endif
if(daemon_mode == FALSE) {
printf("\nNagios Core %s\n", PROGRAM_VERSION);
printf("Copyright (c) 2009-2011 Nagios Core Development Team and Community Contributors\n");
printf("Copyright (c) 1999-2009 Ethan Galstad\n");
printf("Last Modified: %s\n", PROGRAM_MODIFICATION_DATE);
printf("License: GPL\n\n");
printf("Website: http://www.nagios.org\n");
}
/* just display the license */
if(display_license == TRUE) {
printf("This program is free software; you can redistribute it and/or modify\n");
printf("it under the terms of the GNU General Public License version 2 as\n");
printf("published by the Free Software Foundation.\n\n");
printf("This program is distributed in the hope that it will be useful,\n");
printf("but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
printf("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n");
printf("GNU General Public License for more details.\n\n");
printf("You should have received a copy of the GNU General Public License\n");
printf("along with this program; if not, write to the Free Software\n");
printf("Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n\n");
exit(OK);
}
/* make sure we got the main config file on the command line... */
if(optind >= argc)
error = TRUE;
/* if there are no command line options (or if we encountered an error), print usage */
if(error == TRUE || display_help == TRUE) {
printf("Usage: %s [options] <main_config_file>\n", argv[0]);
printf("\n");
printf("Options:\n");
printf("\n");
printf(" -v, --verify-config Verify all configuration data\n");
printf(" -s, --test-scheduling Shows projected/recommended check scheduling and other\n");
printf(" diagnostic info based on the current configuration files.\n");
/*printf(" -o, --dont-verify-objects Don't verify object relationships - USE WITH CAUTION!\n");*/
printf(" -x, --dont-verify-paths Don't check for circular object paths - USE WITH CAUTION!\n");
printf(" -p, --precache-objects Precache object configuration - use with -v or -s options\n");
printf(" -u, --use-precached-objects Use precached object config file\n");
printf(" -d, --daemon Starts Nagios in daemon mode, instead of as a foreground process\n");
printf("\n");
printf("Visit the Nagios website at http://www.nagios.org/ for bug fixes, new\n");
printf("releases, online documentation, FAQs, information on subscribing to\n");
printf("the mailing lists, and commercial support options for Nagios.\n");
printf("\n");
exit(ERROR);
}
/*
* Set the signal handler for the SIGXFSZ signal here because
* we may encounter this signal before the other signal handlers
* are set.
*/
signal(SIGXFSZ, handle_sigxfsz);
/* config file is last argument specified */
config_file = (char *)strdup(argv[optind]);
if(config_file == NULL) {
printf("Error allocating memory.\n");
exit(ERROR);
}
/* make sure the config file uses an absolute path */
if(config_file[0] != '/') {
/* save the name of the config file */
buffer = (char *)strdup(config_file);
/* reallocate a larger chunk of memory */
config_file = (char *)realloc(config_file, MAX_FILENAME_LENGTH);
if(config_file == NULL) {
printf("Error allocating memory.\n");
exit(ERROR);
}
/* get absolute path of current working directory */
getcwd(config_file, MAX_FILENAME_LENGTH);
/* append a forward slash */
strncat(config_file, "/", 1);
config_file[MAX_FILENAME_LENGTH - 1] = '\x0';
/* append the config file to the path */
strncat(config_file, buffer, MAX_FILENAME_LENGTH - strlen(config_file) - 1);
config_file[MAX_FILENAME_LENGTH - 1] = '\x0';
my_free(buffer);
}
/* we're just verifying the configuration... */
if(verify_config == TRUE) {
/* reset program variables */
reset_variables();
printf("Reading configuration data...\n");
/* read in the configuration files (main config file, resource and object config files) */
if((result = read_main_config_file(config_file)) == OK) {
printf(" Read main config file okay...\n");
/* drop privileges */
if((result = drop_privileges(nagios_user, nagios_group)) == ERROR)
printf(" Failed to drop privileges. Aborting.");
else {
/* read object config files */
if((result = read_all_object_data(config_file)) == OK)
printf(" Read object config files okay...\n");
else
printf(" Error processing object config files!\n");
}
}
else
printf(" Error processing main config file!\n\n");
printf("\n");
/* there was a problem reading the config files */
if(result != OK) {
/* if the config filename looks fishy, warn the user */
if(!strstr(config_file, "nagios.cfg")) {
printf("\n***> The name of the main configuration file looks suspicious...\n");
printf("\n");
printf(" Make sure you are specifying the name of the MAIN configuration file on\n");
printf(" the command line and not the name of another configuration file. The\n");
printf(" main configuration file is typically '/usr/local/nagios/etc/nagios.cfg'\n");
}
printf("\n***> One or more problems was encountered while processing the config files...\n");
printf("\n");
printf(" Check your configuration file(s) to ensure that they contain valid\n");
printf(" directives and data defintions. If you are upgrading from a previous\n");
printf(" version of Nagios, you should be aware that some variables/definitions\n");
printf(" may have been removed or modified in this version. Make sure to read\n");
printf(" the HTML documentation regarding the config files, as well as the\n");
printf(" 'Whats New' section to find out what has changed.\n\n");
}
/* the config files were okay, so run the pre-flight check */
else {
printf("Running pre-flight check on configuration data...\n\n");
/* run the pre-flight check to make sure things look okay... */
result = pre_flight_check();
if(result == OK)
printf("\nThings look okay - No serious problems were detected during the pre-flight check\n");
else {
printf("\n***> One or more problems was encountered while running the pre-flight check...\n");
printf("\n");
printf(" Check your configuration file(s) to ensure that they contain valid\n");
printf(" directives and data defintions. If you are upgrading from a previous\n");
printf(" version of Nagios, you should be aware that some variables/definitions\n");
printf(" may have been removed or modified in this version. Make sure to read\n");
printf(" the HTML documentation regarding the config files, as well as the\n");
printf(" 'Whats New' section to find out what has changed.\n\n");
}
}
/* clean up after ourselves */
cleanup();
/* free config_file */
my_free(config_file);
/* exit */
exit(result);
}
/* we're just testing scheduling... */
else if(test_scheduling == TRUE) {
/* reset program variables */
reset_variables();
/* read in the configuration files (main config file and all host config files) */
result = read_main_config_file(config_file);
/* drop privileges */
if(result == OK)
if((result = drop_privileges(nagios_user, nagios_group)) == ERROR)
printf("Failed to drop privileges. Aborting.");
/* read object config files */
if(result == OK)
result = read_all_object_data(config_file);
/* read initial service and host state information */
if(result == OK) {
initialize_retention_data(config_file);
read_initial_state_information();
}
if(result != OK)
printf("***> One or more problems was encountered while reading configuration data...\n");
/* run the pre-flight check to make sure everything looks okay */
if(result == OK) {
if((result = pre_flight_check()) != OK)
printf("***> One or more problems was encountered while running the pre-flight check...\n");
}
if(result == OK) {
/* initialize the event timing loop */
init_timing_loop();
/* display scheduling information */
display_scheduling_info();
if(precache_objects == TRUE) {
printf("\n");
printf("OBJECT PRECACHING\n");
printf("-----------------\n");
printf("Object config files were precached.\n");
}
}
#undef TEST_TIMEPERIODS
#ifdef TEST_TIMEPERIODS
/* DO SOME TIMEPERIOD TESTING - ADDED 08/11/2009 */
time_t now, pref_time, valid_time;
timeperiod *tp;
tp = find_timeperiod("247_exclusion");
time(&now);
pref_time = now;
get_next_valid_time(pref_time, &valid_time, tp);
printf("=====\n");
printf("CURRENT: %lu = %s", (unsigned long)now, ctime(&now));
printf("PREFERRED: %lu = %s", (unsigned long)pref_time, ctime(&pref_time));
printf("NEXT: %lu = %s", (unsigned long)valid_time, ctime(&valid_time));
printf("=====\n");
#endif
/* clean up after ourselves */
cleanup();
/* exit */
exit(result);
}
/* else start to monitor things... */
else {
/* keep monitoring things until we get a shutdown command */
do {
/* reset program variables */
reset_variables();
/* get PID */
nagios_pid = (int)getpid();
/* read in the configuration files (main and resource config files) */
result = read_main_config_file(config_file);
/* NOTE 11/06/07 EG moved to after we read config files, as user may have overridden timezone offset */
/* get program (re)start time and save as macro */
program_start = time(NULL);
my_free(mac->x[MACRO_PROCESSSTARTTIME]);
asprintf(&mac->x[MACRO_PROCESSSTARTTIME], "%lu", (unsigned long)program_start);
/* open debug log */
open_debug_log();
/* drop privileges */
if(drop_privileges(nagios_user, nagios_group) == ERROR) {
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR | NSLOG_CONFIG_ERROR, TRUE, "Failed to drop privileges. Aborting.");
cleanup();
exit(ERROR);
}
#ifdef USE_EVENT_BROKER
/* initialize modules */
neb_init_modules();
neb_init_callback_list();
#endif
/* this must be logged after we read config data, as user may have changed location of main log file */
logit(NSLOG_PROCESS_INFO, TRUE, "Nagios %s starting... (PID=%d)\n", PROGRAM_VERSION, (int)getpid());
/* log the local time - may be different than clock time due to timezone offset */
now = time(NULL);
tm = localtime_r(&now, &tm_s);
strftime(datestring, sizeof(datestring), "%a %b %d %H:%M:%S %Z %Y", tm);
logit(NSLOG_PROCESS_INFO, TRUE, "Local time is %s", datestring);
/* write log version/info */
write_log_file_info(NULL);
#ifdef USE_EVENT_BROKER
/* load modules */
neb_load_all_modules();
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_PRELAUNCH, NEBFLAG_NONE, NEBATTR_NONE, NULL);
#endif
/* read in all object config data */
if(result == OK)
result = read_all_object_data(config_file);
/* there was a problem reading the config files */
if(result != OK)
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR | NSLOG_CONFIG_ERROR, TRUE, "Bailing out due to one or more errors encountered in the configuration files. Run Nagios from the command line with the -v option to verify your config before restarting. (PID=%d)", (int)getpid());
else {
/* run the pre-flight check to make sure everything looks okay*/
if((result = pre_flight_check()) != OK)
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR | NSLOG_VERIFICATION_ERROR, TRUE, "Bailing out due to errors encountered while running the pre-flight check. Run Nagios from the command line with the -v option to verify your config before restarting. (PID=%d)\n", (int)getpid());
}
/* an error occurred that prevented us from (re)starting */
if(result != OK) {
/* if we were restarting, we need to cleanup from the previous run */
if(sigrestart == TRUE) {
/* clean up the status data */
cleanup_status_data(config_file, TRUE);
/* shutdown the external command worker thread */
shutdown_command_file_worker_thread();
/* close and delete the external command file FIFO */
close_command_file();
/* cleanup embedded perl interpreter */
if(embedded_perl_initialized == TRUE)
deinit_embedded_perl();
}
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_SHUTDOWN, NEBFLAG_PROCESS_INITIATED, NEBATTR_SHUTDOWN_ABNORMAL, NULL);
#endif
cleanup();
exit(ERROR);
}
/* initialize embedded Perl interpreter */
/* NOTE 02/15/08 embedded Perl must be initialized if compiled in, regardless of whether or not its enabled in the config file */
/* It compiled it, but not initialized, Nagios will segfault in readdir() calls, as libperl takes this function over */
if(embedded_perl_initialized == FALSE) {
/* if(enable_embedded_perl==TRUE){*/
#ifdef EMBEDDEDPERL
init_embedded_perl(env);
#else
init_embedded_perl(NULL);
#endif
embedded_perl_initialized = TRUE;
/* }*/
}
/* handle signals (interrupts) */
setup_sighandler();
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_START, NEBFLAG_NONE, NEBATTR_NONE, NULL);
#endif
/* enter daemon mode (unless we're restarting...) */
if(daemon_mode == TRUE && sigrestart == FALSE) {
result = daemon_init();
/* we had an error daemonizing, so bail... */
if(result == ERROR) {
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR, TRUE, "Bailing out due to failure to daemonize. (PID=%d)", (int)getpid());
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_SHUTDOWN, NEBFLAG_PROCESS_INITIATED, NEBATTR_SHUTDOWN_ABNORMAL, NULL);
#endif
cleanup();
exit(ERROR);
}
asprintf(&buffer, "Finished daemonizing... (New PID=%d)\n", (int)getpid());
write_to_all_logs(buffer, NSLOG_PROCESS_INFO);
my_free(buffer);
/* get new PID */
nagios_pid = (int)getpid();
}
/* open the command file (named pipe) for reading */
result = open_command_file();
if(result != OK) {
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR, TRUE, "Bailing out due to errors encountered while trying to initialize the external command file... (PID=%d)\n", (int)getpid());
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_SHUTDOWN, NEBFLAG_PROCESS_INITIATED, NEBATTR_SHUTDOWN_ABNORMAL, NULL);
#endif
cleanup();
exit(ERROR);
}
/* initialize status data unless we're starting */
if(sigrestart == FALSE)
initialize_status_data(config_file);
/* read initial service and host state information */
initialize_retention_data(config_file);
read_initial_state_information();
/* initialize comment data */
initialize_comment_data(config_file);
/* initialize scheduled downtime data */
initialize_downtime_data(config_file);
/* initialize performance data */
initialize_performance_data(config_file);
/* Determine which checks are still executing so they are not
scheduled when the timing loop is initialized */
find_executing_checks(check_result_path);
/* initialize the event timing loop */
init_timing_loop();
/* initialize check statistics */
init_check_stats();
/* check for updates */
check_for_nagios_updates(FALSE, TRUE);
/* update all status data (with retained information) */
update_all_status_data();
/* log initial host and service state */
log_host_states(INITIAL_STATES, NULL);
log_service_states(INITIAL_STATES, NULL);
/* reset the restart flag */
sigrestart = FALSE;
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_EVENTLOOPSTART, NEBFLAG_NONE, NEBATTR_NONE, NULL);
#endif
/* get event start time and save as macro */
event_start = time(NULL);
my_free(mac->x[MACRO_EVENTSTARTTIME]);
asprintf(&mac->x[MACRO_EVENTSTARTTIME], "%lu", (unsigned long)event_start);
/***** start monitoring all services *****/
/* (doesn't return until a restart or shutdown signal is encountered) */
event_execution_loop();
/* 03/01/2007 EG Moved from sighandler() to prevent FUTEX locking problems under NPTL */
/* 03/21/2007 EG SIGSEGV signals are still logged in sighandler() so we don't loose them */
/* did we catch a signal? */
if(caught_signal == TRUE) {
if(sig_id == SIGHUP)
asprintf(&buffer, "Caught SIGHUP, restarting...\n");
else if(sig_id != SIGSEGV)
asprintf(&buffer, "Caught SIG%s, shutting down...\n", sigs[sig_id]);
write_to_all_logs(buffer, NSLOG_PROCESS_INFO);
my_free(buffer);
}
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_EVENTLOOPEND, NEBFLAG_NONE, NEBATTR_NONE, NULL);
if(sigshutdown == TRUE)
broker_program_state(NEBTYPE_PROCESS_SHUTDOWN, NEBFLAG_USER_INITIATED, NEBATTR_SHUTDOWN_NORMAL, NULL);
else if(sigrestart == TRUE)
broker_program_state(NEBTYPE_PROCESS_RESTART, NEBFLAG_USER_INITIATED, NEBATTR_RESTART_NORMAL, NULL);
#endif
/* save service and host state information */
save_state_information(FALSE);
cleanup_retention_data(config_file);
/* clean up performance data */
cleanup_performance_data(config_file);
/* clean up the scheduled downtime data */
cleanup_downtime_data(config_file);
/* clean up the comment data */
cleanup_comment_data(config_file);
/* clean up the status data unless we're restarting */
if(sigrestart == FALSE)
cleanup_status_data(config_file, TRUE);
/* close and delete the external command file FIFO unless we're restarting */
if(sigrestart == FALSE) {
shutdown_command_file_worker_thread();
close_command_file();
}
/* cleanup embedded perl interpreter */
if(sigrestart == FALSE)
deinit_embedded_perl();
/* shutdown stuff... */
if(sigshutdown == TRUE) {
/* make sure lock file has been removed - it may not have been if we received a shutdown command */
if(daemon_mode == TRUE)
unlink(lock_file);
/* log a shutdown message */
logit(NSLOG_PROCESS_INFO, TRUE, "Successfully shutdown... (PID=%d)\n", (int)getpid());
}
/* clean up after ourselves */
cleanup();
/* close debug log */
close_debug_log();
}
while(sigrestart == TRUE && sigshutdown == FALSE);
/* free misc memory */
my_free(config_file);
}
return OK;
}
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