int main(int argc, char **argv)
{
int result;
int error = FALSE;
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;
const char *worker_socket = NULL;
int i;
#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'},
{"precache-objects", no_argument, 0, 'p'},
{"use-precached-objects", no_argument, 0, 'u'},
{"enable-timing-point", no_argument, 0, 'T'},
{"worker", required_argument, 0, 'W'},
{0, 0, 0, 0}
};
#define getopt(argc, argv, o) getopt_long(argc, argv, o, long_options, &option_index)
#endif
memset(&loadctl, 0, sizeof(loadctl));
mac = get_global_macros();
/* make sure we have the correct number of command line arguments */
if (argc < 2)
error = TRUE;
/* get all command line arguments */
while (1) {
c = getopt(argc, argv, "+hVvdspuxTW");
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++;
break;
case 's': /* scheduling check */
test_scheduling = TRUE;
break;
case 'd': /* daemon mode */
daemon_mode = TRUE;
break;
case 'p': /* precache object config */
precache_objects = TRUE;
break;
case 'u': /* use precached object config */
use_precached_objects = TRUE;
break;
case 'T':
enable_timing_point = TRUE;
break;
case 'W':
worker_socket = optarg;
break;
case 'x':
printf("Warning: -x is deprecated and will be removed\n");
break;
default:
break;
}
}
/* if we're a worker we can skip everything below */
if (worker_socket) {
exit(nagios_core_worker(worker_socket));
}
if (daemon_mode == FALSE) {
printf("\nNaemon Core %s\n", PROGRAM_VERSION);
printf("Copyright (c) 2013-present Naemon Core Development Team and Community Contributors\n");
printf("Copyright (c) 2009-2013 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.naemon.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 (-v -v for more info)\n");
printf(" -s, --test-scheduling Shows projected/recommended check scheduling and other\n");
printf(" diagnostic info based on the current configuration files.\n");
printf(" -T, --enable-timing-point Enable timed commentary on initialization\n");
printf(" -x, --dont-verify-paths Deprecated (Don't check for circular object paths)\n");
printf(" -p, --precache-objects Precache object configuration\n");
printf(" -u, --use-precached-objects Use precached object config file\n");
printf(" -d, --daemon Starts Naemon in daemon mode, instead of as a foreground process\n");
printf(" -W, --worker /path/to/socket Act as a worker for an already running daemon\n");
printf("\n");
printf("Visit the Naemon website at http://www.naemon.org/ for bug fixes, new\n");
printf("releases, online documentation, FAQs and more...\n");
printf("\n");
exit(ERROR);
}
/*
* config file is last argument specified.
* Make sure it uses an absolute path
*/
config_file = nspath_absolute(argv[optind], NULL);
if (config_file == NULL) {
printf("Error allocating memory.\n");
exit(ERROR);
}
config_file_dir = nspath_absolute_dirname(config_file, NULL);
/*
* 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);
/*
* let's go to town. We'll be noisy if we're verifying config
* or running scheduling tests.
*/
if (verify_config || test_scheduling || precache_objects) {
reset_variables();
/*
* if we don't beef up our resource limits as much as
* we can, it's quite possible we'll run headlong into
* EAGAIN due to too many processes when we try to
* drop privileges later.
*/
set_loadctl_defaults();
if (verify_config)
printf("Reading configuration data...\n");
/* read our config file */
result = read_main_config_file(config_file);
if (result != OK) {
printf(" Error processing main config file!\n\n");
exit(EXIT_FAILURE);
}
if (verify_config)
printf(" Read main config file okay...\n");
/* drop privileges */
if ((result = drop_privileges(naemon_user, naemon_group)) == ERROR) {
printf(" Failed to drop privileges. Aborting.");
exit(EXIT_FAILURE);
}
/*
* this must come after dropping privileges, so we make
* sure to test access permissions as the right user.
*/
if (test_configured_paths() == ERROR) {
printf(" One or more path problems detected. Aborting.\n");
exit(EXIT_FAILURE);
}
/* read object config files */
result = read_all_object_data(config_file);
if (result != OK) {
printf(" Error processing object config files!\n\n");
/* if the config filename looks fishy, warn the user */
if (!strstr(config_file, "naemon.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 '%s'\n", DEFAULT_CONFIG_FILE);
}
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 Naemon, 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");
exit(EXIT_FAILURE);
}
if (verify_config) {
printf(" Read object config files okay...\n\n");
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("\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 Naemon, 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");
exit(EXIT_FAILURE);
}
if (verify_config) {
printf("\nThings look okay - No serious problems were detected during the pre-flight check\n");
}
/* scheduling tests need a bit more than config verifications */
if (test_scheduling == TRUE) {
/* we'll need the event queue here so we can time insertions */
init_event_queue();
timing_point("Done initializing event queue\n");
/* read initial service and host state information */
initialize_retention_data(config_file);
read_initial_state_information();
timing_point("Retention data and initial state parsed\n");
/* initialize the event timing loop */
init_timing_loop();
timing_point("Timing loop initialized\n");
/* display scheduling information */
display_scheduling_info();
}
if (precache_objects) {
result = fcache_objects(object_precache_file);
timing_point("Done precaching objects\n");
if (result == OK) {
printf("Object precache file created:\n%s\n", object_precache_file);
} else {
printf("Failed to precache objects to '%s': %s\n", object_precache_file, strerror(errno));
}
}
/* clean up after ourselves */
cleanup();
/* exit */
timing_point("Exiting\n");
/* make valgrind shut up about still reachable memory */
neb_free_module_list();
free(config_file_dir);
free(config_file);
exit(result);
}
/* start to monitor things... */
/*
* if we're called with a relative path we must make
* it absolute so we can launch our workers.
* If not, we needn't bother, as we're using execvp()
*/
if (strchr(argv[0], '/'))
naemon_binary_path = nspath_absolute(argv[0], NULL);
else
naemon_binary_path = strdup(argv[0]);
if (!naemon_binary_path) {
logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: Unable to allocate memory for naemon_binary_path\n");
exit(EXIT_FAILURE);
}
if (!(nagios_iobs = iobroker_create())) {
logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: Failed to create IO broker set: %s\n",
strerror(errno));
exit(EXIT_FAILURE);
}
/* keep monitoring things until we get a shutdown command */
do {
/* reset internal book-keeping (in case we're restarting) */
wproc_num_workers_spawned = wproc_num_workers_online = 0;
caught_signal = sigshutdown = sigrestart = FALSE;
sig_id = 0;
/* reset program variables */
reset_variables();
timing_point("Variables reset\n");
/* get PID */
nagios_pid = (int)getpid();
/* read in the configuration files (main and resource config files) */
result = read_main_config_file(config_file);
if (result != OK) {
logit(NSLOG_CONFIG_ERROR, TRUE, "Error: Failed to process config file '%s'. Aborting\n", config_file);
exit(EXIT_FAILURE);
}
timing_point("Main config file read\n");
/* 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);
/* drop privileges */
if (drop_privileges(naemon_user, naemon_group) == ERROR) {
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR | NSLOG_CONFIG_ERROR, TRUE, "Failed to drop privileges. Aborting.");
cleanup();
exit(ERROR);
}
if (test_path_access(naemon_binary_path, X_OK)) {
logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: failed to access() %s: %s\n", naemon_binary_path, strerror(errno));
logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: Spawning workers will be impossible. Aborting.\n");
exit(EXIT_FAILURE);
}
if (test_configured_paths() == ERROR) {
/* error has already been logged */
exit(EXIT_FAILURE);
}
/* 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());
cleanup();
exit(EXIT_FAILURE);
}
/* get new PID */
nagios_pid = (int)getpid();
}
/* this must be logged after we read config data, as user may have changed location of main log file */
logit(NSLOG_PROCESS_INFO, TRUE, "Naemon %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);
/* open debug log now that we're the right user */
open_debug_log();
#ifdef USE_EVENT_BROKER
/* initialize modules */
neb_init_modules();
neb_init_callback_list();
#endif
timing_point("NEB module API initialized\n");
/* handle signals (interrupts) before we do any socket I/O */
setup_sighandler();
/*
* Initialize query handler and event subscription service.
* This must be done before modules are initialized, so
* the modules can use our in-core stuff properly
*/
if (qh_init(qh_socket_path ? qh_socket_path : DEFAULT_QUERY_SOCKET) != OK) {
logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: Failed to initialize query handler. Aborting\n");
exit(EXIT_FAILURE);
}
timing_point("Query handler initialized\n");
nerd_init();
timing_point("NERD initialized\n");
/* initialize check workers */
if (init_workers(num_check_workers) < 0) {
logit(NSLOG_RUNTIME_ERROR, TRUE, "Failed to spawn workers. Aborting\n");
exit(EXIT_FAILURE);
}
timing_point("%u workers spawned\n", wproc_num_workers_spawned);
i = 0;
while (i < 50 && wproc_num_workers_online < wproc_num_workers_spawned) {
iobroker_poll(nagios_iobs, 50);
i++;
}
timing_point("%u workers connected\n", wproc_num_workers_online);
/* now that workers have arrived we can set the defaults */
set_loadctl_defaults();
/* read in all object config data */
if (result == OK)
result = read_all_object_data(config_file);
/*
* the queue has to be initialized befor loading the neb modules
* to give them the chance to register user events.
* (initializing event queue requires number of objects, so do
* this after parsing the objects)
*/
init_event_queue();
timing_point("Event queue initialized\n");
#ifdef USE_EVENT_BROKER
/* load modules */
if (neb_load_all_modules() != OK) {
logit(NSLOG_CONFIG_ERROR, ERROR, "Error: Module loading failed. Aborting.\n");
/* if we're dumping core, we must remove all dl-files */
if (daemon_dumps_core)
neb_unload_all_modules(NEBMODULE_FORCE_UNLOAD, NEBMODULE_NEB_SHUTDOWN);
exit(EXIT_FAILURE);
}
timing_point("Modules loaded\n");
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_PRELAUNCH, NEBFLAG_NONE, NEBATTR_NONE, NULL);
timing_point("First callback made\n");
#endif
/* 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 Naemon 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 Naemon 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(TRUE);
}
#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);
}
timing_point("Object configuration parsed and understood\n");
/* write the objects.cache file */
fcache_objects(object_cache_file);
timing_point("Objects cached\n");
#ifdef USE_EVENT_BROKER
/* send program data to broker */
broker_program_state(NEBTYPE_PROCESS_START, NEBFLAG_NONE, NEBATTR_NONE, NULL);
#endif
/* initialize status data unless we're starting */
if (sigrestart == FALSE) {
initialize_status_data(config_file);
timing_point("Status data initialized\n");
}
/* initialize scheduled downtime data */
initialize_downtime_data();
timing_point("Downtime data initialized\n");
/* read initial service and host state information */
initialize_retention_data(config_file);
timing_point("Retention data initialized\n");
read_initial_state_information();
timing_point("Initial state information read\n");
/* initialize comment data */
initialize_comment_data();
timing_point("Comment data initialized\n");
/* initialize performance data */
initialize_performance_data(config_file);
timing_point("Performance data initialized\n");
/* initialize the event timing loop */
init_timing_loop();
timing_point("Event timing loop initialized\n");
/* initialize check statistics */
init_check_stats();
timing_point("check stats initialized\n");
/* update all status data (with retained information) */
update_all_status_data();
timing_point("Status data updated\n");
/* log initial host and service state */
log_host_states(INITIAL_STATES, NULL);
log_service_states(INITIAL_STATES, NULL);
timing_point("Initial states logged\n");
/* reset the restart flag */
sigrestart = FALSE;
/* fire up command file worker */
launch_command_file_worker();
timing_point("Command file worker launched\n");
#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);
timing_point("Entering event execution loop\n");
/***** start monitoring all services *****/
/* (doesn't return until a restart or shutdown signal is encountered) */
event_execution_loop();
/*
* immediately deinitialize the query handler so it
* can remove modules that have stashed data with it
*/
qh_deinit(qh_socket_path ? qh_socket_path : DEFAULT_QUERY_SOCKET);
/* 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)
logit(NSLOG_PROCESS_INFO, TRUE, "Caught SIGHUP, restarting...\n");
}
#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
disconnect_command_file_worker();
/* save service and host state information */
save_state_information(FALSE);
cleanup_retention_data();
/* clean up performance data */
cleanup_performance_data();
/* clean up the scheduled downtime data */
cleanup_downtime_data();
/* clean up the status data unless we're restarting */
if (sigrestart == FALSE) {
cleanup_status_data(TRUE);
}
free_worker_memory(WPROC_FORCE);
/* shutdown stuff... */
if (sigshutdown == TRUE) {
iobroker_destroy(nagios_iobs, IOBROKER_CLOSE_SOCKETS);
nagios_iobs = NULL;
/* 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);
if (daemon_mode == TRUE)
unlink(lock_file);
/* free misc memory */
my_free(lock_file);
my_free(config_file);
my_free(config_file_dir);
my_free(naemon_binary_path);
return OK;
}
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;
#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'},
{"precache-objects", no_argument, 0, 'p'},
{"use-precached-objects", no_argument, 0, 'u'},
{"enable-timing-point", no_argument, 0, 'T'},
{0, 0, 0, 0}
};
#define getopt(argc, argv, o) getopt_long(argc, argv, o, long_options, &option_index)
#endif
mac = get_global_macros();
/* make sure we have the correct number of command line arguments */
if(argc < 2)
error = TRUE;
/* get all command line arguments */
while(1) {
c = getopt(argc, argv, "+hVvdspuxT");
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++;
break;
case 's': /* scheduling check */
test_scheduling = TRUE;
break;
case 'd': /* daemon mode */
daemon_mode = TRUE;
break;
case 'p': /* precache object config */
precache_objects = TRUE;
break;
case 'u': /* use precached object config */
use_precached_objects = TRUE;
break;
case 'T':
enable_timing_point = TRUE;
break;
case 'x':
printf("Warning: -x is deprecated and will be removed\n");
break;
default:
break;
}
}
#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 (-v -v for more info)\n");
printf(" -s, --test-scheduling Shows projected/recommended check scheduling and other\n");
printf(" diagnostic info based on the current configuration files.\n");
printf(" -T, --enable-timing-point Enable timed commentary on initialization\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\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);
}
/* 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);
}
/*
* let's go to town. We'll be noisy if we're verifying config
* or running scheduling tests.
*/
if(verify_config || test_scheduling || precache_objects) {
reset_variables();
if(verify_config)
printf("Reading configuration data...\n");
/* read our config file */
result = read_main_config_file(config_file);
if(result != OK) {
printf(" Error processing main config file!\n\n");
exit(EXIT_FAILURE);
}
if(verify_config)
printf(" Read main config file okay...\n");
/* drop privileges */
if((result = drop_privileges(nagios_user, nagios_group)) == ERROR) {
printf(" Failed to drop privileges. Aborting.");
exit(EXIT_FAILURE);
}
/* read object config files */
result = read_all_object_data(config_file);
if(result != OK) {
printf(" Error processing object config files!\n\n");
/* 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");
exit(EXIT_FAILURE);
}
if(verify_config) {
printf(" Read object config files okay...\n\n");
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("\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");
exit(EXIT_FAILURE);
}
if(verify_config) {
printf("\nThings look okay - No serious problems were detected during the pre-flight check\n");
}
/* scheduling tests need a bit more than config verifications */
if(test_scheduling == TRUE) {
/* we'll need the event queue here so we can time insertions */
init_event_queue();
timing_point("Done initializing event queue\n");
/* read initial service and host state information */
initialize_retention_data(config_file);
read_initial_state_information();
timing_point("Retention data and initial state parsed\n");
/* initialize the event timing loop */
init_timing_loop();
timing_point("Timing loop initialized\n");
/* display scheduling information */
display_scheduling_info();
}
if(precache_objects) {
result = fcache_objects(object_precache_file);
timing_point("Done precaching objects\n");
if(result == OK) {
printf("Object precache file created:\n%s\n", object_precache_file);
}
else {
printf("Failed to precache objects to '%s': %s\n", object_precache_file, strerror(errno));
}
}
/* clean up after ourselves */
cleanup();
/* exit */
timing_point("Exiting\n");
exit(result);
}
/* else start to monitor things... */
else {
nagios_iobs = iobroker_create();
/* keep monitoring things until we get a shutdown command */
do {
init_event_queue();
/* 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);
}
#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);
}
/* write the objects.cache file */
fcache_objects(object_cache_file);
/* 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();
}
/* 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);
/* 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;
/* fire up command file worker */
launch_command_file_worker();
/* @TODO: get number of workers from config */
init_workers(4);
#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)
logit(NSLOG_PROCESS_INFO, TRUE, "Caught SIGHUP, restarting...\n");
}
#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 status data unless we're restarting */
if(sigrestart == FALSE) {
cleanup_status_data(config_file, TRUE);
}
/* shutdown stuff... */
if(sigshutdown == TRUE) {
free_worker_memory(WPROC_FORCE);
iobroker_destroy(nagios_iobs, IOBROKER_CLOSE_SOCKETS);
/* 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;
}
int daemon_init(void)
{
int pid = 0;
int lockfile = 0;
int val = 0;
char buf[256];
struct flock lock;
if (set_working_directory() == (ERROR)) {
return (ERROR);
}
umask(S_IWGRP | S_IWOTH);
lockfile = open(lock_file, O_RDWR | O_CREAT, S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
if (lockfile < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Failed to obtain lock on file %s: %s\n", lock_file, strerror(errno));
nm_log(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR, "Bailing out due to errors encountered while attempting to daemonize... (PID=%d)", (int)getpid());
return (ERROR);
}
/* see if we can read the contents of the lockfile */
if ((val = read(lockfile, buf, (size_t)10)) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Lockfile exists but cannot be read");
return (ERROR);
}
/* we read something - check the PID */
if (val > 0) {
if ((val = sscanf(buf, "%d", &pid)) < 1) {
nm_log(NSLOG_RUNTIME_ERROR, "Lockfile '%s' does not contain a valid PID (%s)", lock_file, buf);
return (ERROR);
}
}
/* check for SIGHUP */
if (val == 1 && pid == (int)getpid()) {
return OK;
}
else {
lock.l_type = F_WRLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0;
if (fcntl(lockfile, F_GETLK, &lock) == -1) {
nm_log(NSLOG_RUNTIME_ERROR, "Failed to access lockfile '%s'. %s. Bailing out...", lock_file, strerror(errno));
return (ERROR);
}
if (lock.l_type != F_UNLCK) {
nm_log(NSLOG_RUNTIME_ERROR, "Lockfile '%s' looks like its already held by another instance of Naemon (PID %d). Bailing out, pre-fork...", lock_file, (int)lock.l_pid);
return (ERROR);
}
}
/*
* set up a pipe used for sending a message from the child to the parent
* when initialization is complete.
*/
if (pipe(upipe_fd) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Failed to set up unnamned pipe: %s",
strerror(errno));
return (ERROR);
}
if ((pid = (int)fork()) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Unable to fork out the daemon process: %s",
strerror(errno));
return (ERROR);
} else if (pid != 0) {
/* parent stops - when child is done, we exit here */
int return_code = EXIT_FAILURE;
if (close(upipe_fd[PIPE_WRITE]) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Unable to close parent write end: %s",
strerror(errno));
return_code = EXIT_FAILURE;
}
/*
* wait for child to send the OK return code, if the child dies
* we stop blocking and the return code remains EXIT_FAILURE.
*/
if (read(upipe_fd[PIPE_READ], &return_code, sizeof(int)) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Unable to read from pipe: %s",
strerror(errno));
return_code = EXIT_FAILURE;
}
if (close(upipe_fd[PIPE_READ]) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Unable to close parent read end: %s",
strerror(errno));
return_code = EXIT_FAILURE;
}
if (return_code != OK) {
/* signal the child to die in case an error occurs in parent */
kill(pid, SIGTERM);
}
exit(return_code);
} else {
/* close read end of the pipe in the child */
if (close(upipe_fd[PIPE_READ]) < 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Unable to close child read end: %s",
strerror(errno));
return ERROR;
}
}
/* child becomes session leader... */
setsid();
/* place a file lock on the lock file */
lock.l_type = F_WRLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0;
lock.l_pid = getpid();
if (fcntl(lockfile, F_SETLK, &lock) == -1) {
if (errno == EACCES || errno == EAGAIN) {
fcntl(lockfile, F_GETLK, &lock);
nm_log(NSLOG_RUNTIME_ERROR, "Lockfile '%s' looks like its already held by another instance of Naemon (PID %d). Bailing out, post-fork...", lock_file, (int)lock.l_pid);
} else
nm_log(NSLOG_RUNTIME_ERROR, "Cannot lock lockfile '%s': %s. Bailing out...", lock_file, strerror(errno));
return (ERROR);
}
/* write PID to lockfile... */
lseek(lockfile, 0, SEEK_SET);
if (ftruncate(lockfile, 0) != 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Cannot truncate lockfile '%s': %s. Bailing out...", lock_file, strerror(errno));
return (ERROR);
}
sprintf(buf, "%d\n", (int)getpid());
if (nsock_write_all(lockfile, buf, strlen(buf)) != 0) {
nm_log(NSLOG_RUNTIME_ERROR, "Cannot write PID to lockfile '%s': %s. Bailing out...", lock_file, strerror(errno));
return (ERROR);
}
/* make sure lock file stays open while program is executing... */
val = fcntl(lockfile, F_GETFD, 0);
val |= FD_CLOEXEC;
fcntl(lockfile, F_SETFD, val);
/* close existing stdin, stdout, stderr */
close(0);
close(1);
close(2);
/* THIS HAS TO BE DONE TO AVOID PROBLEMS WITH STDERR BEING REDIRECTED TO SERVICE MESSAGE PIPE! */
/* re-open stdin, stdout, stderr with known values */
open("/dev/null", O_RDONLY);
open("/dev/null", O_WRONLY);
open("/dev/null", O_WRONLY);
broker_program_state(NEBTYPE_PROCESS_DAEMONIZE, NEBFLAG_NONE, NEBATTR_NONE);
return OK;
}
/* 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];
icinga_macros *mac;
#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'},
{"show-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
mac = get_global_macros();
/* 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, "+hVvdsoxpuS", long_options, &option_index);
#else
c = getopt(argc, argv, "+hVvdsoxpuS");
#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++;
break;
case 's': /* scheduling check */
test_scheduling = TRUE;
break;
case 'S': /* scheduling check and show queue*/
show_schedule = TRUE;
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 == 0)) {
error = TRUE;
display_help = TRUE;
}
#ifdef DEBUG_MEMORY
mtrace();
#endif
if (daemon_mode == FALSE) {
printf("\n%s %s\n", PROGRAM_NAME , PROGRAM_VERSION);
printf("Copyright (c) 2009-present Icinga Development Team (http://www.icinga.org)\n");
printf("Copyright (c) 2009-2013 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");
}
/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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(" -S, --show-scheduling Same as -s, but also show the scheduling queue\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 %s in daemon mode, instead of as a foreground process\n", PROGRAM_NAME);
printf("\n");
printf("Visit the %s website at http://www.icinga.org/ for bug fixes, new\n", PROGRAM_NAME);
printf("releases, online documentation, FAQs, information on subscribing to\n");
printf("the mailing lists, and commercial support options for %s.\n", PROGRAM_NAME);
printf("\n");
exit(ERROR);
}
/* 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) {
/* 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") && !strstr(config_file, "icinga.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/icinga/etc/icinga.cfg'\n");
printf(" or if using packages, most likely '/etc/icinga/icinga.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 definitions. If you are upgrading from a previous\n");
printf(" version of %s, you should be aware that some variables/definitions\n", PROGRAM_NAME);
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 and the Changelog CHANGES section as well to find\n");
printf(" 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 definitions. If you are upgrading from a previous\n");
printf(" version of %s, you should be aware that some variables/definitions\n", PROGRAM_NAME);
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 schedule */
if (show_schedule == TRUE)
display_schedule();
/* 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) */
if (read_main_config_file(config_file) == ERROR) {
logit(NSLOG_PROCESS_INFO | NSLOG_RUNTIME_ERROR | NSLOG_CONFIG_ERROR, TRUE, "Failed to read main config file. Aborting.");
cleanup();
exit(EXIT_FAILURE);
}
/* we need to read the modules in the first place as object configuration before neb modules are initialized/loaded */
result = read_object_config_data(config_file, READ_MODULES, FALSE, FALSE);
/* add modules to neb */
result = add_module_objects_to_neb();
/* 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, "%s %s starting... (PID=%d)\n", PROGRAM_NAME, 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 */
if (neb_load_all_modules() != OK) {
logit(NSLOG_CONFIG_ERROR, ERROR, "Error: NEB module loading failed. Aborting.\n");
if (daemon_dumps_core)
neb_unload_all_modules(NEBMODULE_FORCE_UNLOAD, NEBMODULE_NEB_SHUTDOWN);
exit(EXIT_FAILURE);
}
/* forcibly send a program status update
* for later updates of PROCESS_* */
broker_program_status(NEBTYPE_PROGRAMSTATUS_UPDATE, NEBFLAG_NONE, NEBATTR_NONE, NULL);
/* 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 %s from the command line with the -v option to verify your config before restarting. (PID=%d)", PROGRAM_NAME , (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 %s from the command line with the -v option to verify your config before restarting. (PID=%d)\n", PROGRAM_NAME , (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, Icinga 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();
sync_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);
/* initialize the event timing loop */
init_timing_loop();
/* initialize check statistics */
init_check_stats();
/* 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);
/* print event loop start */
asprintf(&buffer, "Event loop started...\n");
write_to_all_logs(buffer, NSLOG_PROCESS_INFO);
my_free(buffer);
/***** 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;
}