int main(int argc, char **argv) { int result; /* reset internal variables */ reset_cgi_vars(); /* Initialize shared configuration variables */ init_shared_cfg_vars(1); /* read the CGI configuration file */ result = read_cgi_config_file(get_cgi_config_location()); if(result == ERROR) { document_header(); return ERROR; } /* defaults from CGI config file */ layout_method = default_statuswrl_layout_method; /* get the arguments passed in the URL */ process_cgivars(); document_header(); /* read the main configuration file */ result = read_main_config_file(main_config_file); if(result == ERROR) return ERROR; /* read all object configuration data */ result = read_all_object_configuration_data(main_config_file, READ_ALL_OBJECT_DATA); if(result == ERROR) return ERROR; /* read all status data */ result = read_all_status_data(status_file, READ_ALL_STATUS_DATA); if(result == ERROR) { free_memory(); return ERROR; } /* get authentication information */ get_authentication_information(¤t_authdata); /* display the 3-D VRML world... */ display_world(); /* free all allocated memory */ free_memory(); return OK; }
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; } } #ifdef DEBUG_MEMORY mtrace(); #endif /* if we're a worker we can skip everything below */ if(worker_socket) { exit(nagios_core_worker(worker_socket)); } /* Initialize configuration variables */ init_main_cfg_vars(1); init_shared_cfg_vars(1); if(daemon_mode == FALSE) { printf("\nNagios Core %s\n", PROGRAM_VERSION); printf("Copyright (c) 2009-present 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: https://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(" -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 Nagios 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 Nagios website at https://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. * 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(nagios_user, nagios_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 (!verify_config && 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, "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 '%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 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"); /* make valgrind shut up about still reachable memory */ neb_free_module_list(); free(config_file_dir); free(config_file); exit(result); } /* else start to monitor things... */ else { /* * 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], '/')) nagios_binary_path = nspath_absolute(argv[0], NULL); else nagios_binary_path = strdup(argv[0]); if (!nagios_binary_path) { logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: Unable to allocate memory for nagios_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 = 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(nagios_user, nagios_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(nagios_binary_path, X_OK)) { logit(NSLOG_RUNTIME_ERROR, TRUE, "Error: failed to access() %s: %s\n", nagios_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, "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); /* 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(); #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 /* 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(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"); init_event_queue(); timing_point("Event queue initialized\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"); /* check for updates */ check_for_nagios_updates(FALSE, TRUE); timing_point("Update check concluded\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 /* 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(nagios_binary_path); } return OK; }
int main(void) { int result = OK; /* get the arguments passed in the URL */ process_cgivars(); /* reset internal variables */ reset_cgi_vars(); /* Initialize shared configuration variables */ init_shared_cfg_vars(1); document_header(); /* validate arguments in URL */ result = validate_arguments(); if(result == ERROR) { document_footer(); return ERROR; } /* read the CGI configuration file */ result = read_cgi_config_file(get_cgi_config_location(), NULL); if(result == ERROR) { printf("<P>Error: Could not open CGI configuration file '%s' for reading!</P>\n", get_cgi_config_location()); document_footer(); return ERROR; } /* read the main configuration file */ result = read_main_config_file(main_config_file); if(result == ERROR) { printf("<P>Error: Could not open main configuration file '%s' for reading!</P>\n", main_config_file); document_footer(); return ERROR; } /* read all object configuration data */ result = read_all_object_configuration_data(main_config_file, READ_ALL_OBJECT_DATA); if(result == ERROR) { printf("<P>Error: Could not read some or all object configuration data!</P>\n"); document_footer(); return ERROR; } /* read all status data */ result = read_all_status_data(status_file, READ_ALL_STATUS_DATA); if(result == ERROR) { printf("<P>Error: Could not read host and service status information!</P>\n"); document_footer(); free_memory(); return ERROR; } /* get authentication information */ get_authentication_information(¤t_authdata); /* decide what to display to the user */ if(display_type == DISPLAY_HOST && host_style == DISPLAY_HOST_SERVICES) display_host_services(); else if(display_type == DISPLAY_HOST) display_host(); else if(display_type == DISPLAY_SERVICE) display_service(); else if(display_type == DISPLAY_HOSTGROUP && hostgroup_style == DISPLAY_HOSTGROUP_OVERVIEW) display_hostgroup_overview(); else if(display_type == DISPLAY_HOSTGROUP && hostgroup_style == DISPLAY_HOSTGROUP_SUMMARY) display_hostgroup_summary(); else if(display_type == DISPLAY_PING) display_ping(); else if(display_type == DISPLAY_TRACEROUTE) display_traceroute(); else if(display_type == DISPLAY_QUICKSTATS) display_quick_stats(); else if(display_type == DISPLAY_PROCESS) display_process(); else if(display_type == DISPLAY_ALL_PROBLEMS || display_type == DISPLAY_UNHANDLED_PROBLEMS) display_problems(); else display_index(); document_footer(); /* free all allocated memory */ free_memory(); return OK; }