/* writes service/host check results to the Icinga command file */
static int write_check_result(char *host_name, char *svc_description, int return_code, char *plugin_output, time_t check_time) {
char buffer[MAX_INPUT_BUFFER];
int res = 0;
if (debug == TRUE)
syslog(LOG_ERR, "Attempting to write to icinga command pipe");
if (aggregate_writes == FALSE) {
if (open_command_file() == ERROR)
return ERROR;
}
if (!strcmp(svc_description, "")) {
sprintf(buffer, "[%lu] PROCESS_HOST_CHECK_RESULT;%s;%d;%s\n", (unsigned long)check_time, host_name, return_code, plugin_output);
}
else {
sprintf(buffer, "[%lu] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n", (unsigned long)check_time, host_name, svc_description, return_code, plugin_output
}
res = write(fileno(command_file_fp), buffer, strlen(buffer));
if (res == -1) {
syslog(LOG_ERR, "Write failed!");
close_command_file();
open_command_file();
}
if (aggregate_writes == FALSE)
close_command_file();
else
/* if we don't fflush() then we're writing in 4k non-CR-terminated blocks, and
* anything else (eg. pscwatch) which writes to the file will be writing into
* the middle of our commands.
*/
fflush(command_file_fp);
return OK;
}
/* cleanup */
static void do_cleanup(void) {
/* free memory */
free_memory();
/* close the command file if its still open */
if (command_file_fp != NULL)
close_command_file();
/*** CLEAR SENSITIVE INFO FROM MEMORY ***/
/* overwrite password */
clear_buffer(password, sizeof(password));
/* disguise decryption method */
decryption_method = -1;
return;
}
/* 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;
}
