plugins/check_overcr.c

   1 /*****************************************************************************
   2  *
   3  * Monitoring check_overcr plugin
   4  *
   5  * License: GPL
   6  * Copyright (c) 2000-2024 Monitoring Plugins Development Team
   7  *
   8  * Description:
   9  *
  10  * This file contains the check_overcr plugin
  11  *
  12  * This plugin attempts to contact the Over-CR collector daemon running on the
  13  * remote UNIX server in order to gather the requested system information.
  14  *
  15  *
  16  * This program is free software: you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation, either version 3 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28  *
  29  *
  30  *****************************************************************************/
  31
  32 const char *progname = "check_overcr";
  33 const char *copyright = "2000-2024";
  34 const char *email = "devel@monitoring-plugins.org";
  35
  36 #include "common.h"
  37 #include "netutils.h"
  38 #include "utils.h"
  39
  40 enum checkvar {
  41         NONE,
  42         LOAD1,
  43         LOAD5,
  44         LOAD15,
  45         DPU,
  46         PROCS,
  47         NETSTAT,
  48         UPTIME
  49 };
  50
  51 enum {
  52         PORT = 2000
  53 };
  54
  55 char *server_address = NULL;
  56 int server_port = PORT;
  57 double warning_value = 0L;
  58 double critical_value = 0L;
  59 bool check_warning_value = false;
  60 bool check_critical_value = false;
  61 enum checkvar vars_to_check = NONE;
  62 int cmd_timeout = 1;
  63
  64 int netstat_port = 0;
  65 char *disk_name = NULL;
  66 char *process_name = NULL;
  67 char send_buffer[MAX_INPUT_BUFFER];
  68
  69 int process_arguments(int, char **);
  70 void print_usage(void);
  71 void print_help(void);
  72
  73 int main(int argc, char **argv) {
  74         int result = STATE_UNKNOWN;
  75         char recv_buffer[MAX_INPUT_BUFFER];
  76         char temp_buffer[MAX_INPUT_BUFFER];
  77         char *temp_ptr = NULL;
  78         bool found_disk = false;
  79         unsigned long percent_used_disk_space = 100;
  80         double load;
  81         double load_1min;
  82         double load_5min;
  83         double load_15min;
  84         int port_connections = 0;
  85         int processes = 0;
  86         double uptime_raw_hours;
  87         int uptime_raw_minutes = 0;
  88         int uptime_days = 0;
  89         int uptime_hours = 0;
  90         int uptime_minutes = 0;
  91
  92         setlocale(LC_ALL, "");
  93         bindtextdomain(PACKAGE, LOCALEDIR);
  94         textdomain(PACKAGE);
  95
  96         /* Parse extra opts if any */
  97         argv = np_extra_opts(&argc, argv, progname);
  98
  99         if (process_arguments(argc, argv) == ERROR)
 100                 usage4(_("Could not parse arguments"));
 101
 102         /* initialize alarm signal handling */
 103         signal(SIGALRM, socket_timeout_alarm_handler);
 104
 105         /* set socket timeout */
 106         alarm(socket_timeout);
 107
 108         result = process_tcp_request2(server_address, server_port, send_buffer, recv_buffer, sizeof(recv_buffer));
 109
 110         switch (vars_to_check) {
 111
 112         case LOAD1:
 113         case LOAD5:
 114         case LOAD15:
 115
 116                 if (result != STATE_OK)
 117                         die(result, _("Unknown error fetching load data\n"));
 118
 119                 temp_ptr = (char *)strtok(recv_buffer, "\r\n");
 120                 if (temp_ptr == NULL)
 121                         die(STATE_CRITICAL, _("Invalid response from server - no load information\n"));
 122                 else
 123                         load_1min = strtod(temp_ptr, NULL);
 124
 125                 temp_ptr = (char *)strtok(NULL, "\r\n");
 126                 if (temp_ptr == NULL)
 127                         die(STATE_CRITICAL, _("Invalid response from server after load 1\n"));
 128                 else
 129                         load_5min = strtod(temp_ptr, NULL);
 130
 131                 temp_ptr = (char *)strtok(NULL, "\r\n");
 132                 if (temp_ptr == NULL)
 133                         die(STATE_CRITICAL, _("Invalid response from server after load 5\n"));
 134                 else
 135                         load_15min = strtod(temp_ptr, NULL);
 136
 137                 switch (vars_to_check) {
 138                 case LOAD1:
 139                         strcpy(temp_buffer, "1");
 140                         load = load_1min;
 141                         break;
 142                 case LOAD5:
 143                         strcpy(temp_buffer, "5");
 144                         load = load_5min;
 145                         break;
 146                 default:
 147                         strcpy(temp_buffer, "15");
 148                         load = load_15min;
 149                         break;
 150                 }
 151
 152                 if (check_critical_value && (load >= critical_value))
 153                         result = STATE_CRITICAL;
 154                 else if (check_warning_value && (load >= warning_value))
 155                         result = STATE_WARNING;
 156
 157                 die(result, _("Load %s - %s-min load average = %0.2f"), state_text(result), temp_buffer, load);
 158
 159                 break;
 160
 161         case DPU:
 162
 163                 if (result != STATE_OK)
 164                         die(result, _("Unknown error fetching disk data\n"));
 165
 166                 for (temp_ptr = (char *)strtok(recv_buffer, " "); temp_ptr != NULL; temp_ptr = (char *)strtok(NULL, " ")) {
 167
 168                         if (!strcmp(temp_ptr, disk_name)) {
 169                                 found_disk = true;
 170                                 temp_ptr = (char *)strtok(NULL, "%");
 171                                 if (temp_ptr == NULL)
 172                                         die(STATE_CRITICAL, _("Invalid response from server\n"));
 173                                 else
 174                                         percent_used_disk_space = strtoul(temp_ptr, NULL, 10);
 175                                 break;
 176                         }
 177
 178                         temp_ptr = (char *)strtok(NULL, "\r\n");
 179                 }
 180
 181                 /* error if we couldn't find the info for the disk */
 182                 if (!found_disk)
 183                         die(STATE_CRITICAL, "CRITICAL - Disk '%s' non-existent or not mounted", disk_name);
 184
 185                 if (check_critical_value && (percent_used_disk_space >= critical_value))
 186                         result = STATE_CRITICAL;
 187                 else if (check_warning_value && (percent_used_disk_space >= warning_value))
 188                         result = STATE_WARNING;
 189
 190                 die(result, "Disk %s - %lu%% used on %s", state_text(result), percent_used_disk_space, disk_name);
 191
 192                 break;
 193
 194         case NETSTAT:
 195
 196                 if (result != STATE_OK)
 197                         die(result, _("Unknown error fetching network status\n"));
 198                 else
 199                         port_connections = strtod(recv_buffer, NULL);
 200
 201                 if (check_critical_value && (port_connections >= critical_value))
 202                         result = STATE_CRITICAL;
 203                 else if (check_warning_value && (port_connections >= warning_value))
 204                         result = STATE_WARNING;
 205
 206                 die(result, _("Net %s - %d connection%s on port %d"), state_text(result), port_connections, (port_connections == 1) ? "" : "s",
 207                         netstat_port);
 208
 209                 break;
 210
 211         case PROCS:
 212
 213                 if (result != STATE_OK)
 214                         die(result, _("Unknown error fetching process status\n"));
 215
 216                 temp_ptr = (char *)strtok(recv_buffer, "(");
 217                 if (temp_ptr == NULL)
 218                         die(STATE_CRITICAL, _("Invalid response from server\n"));
 219
 220                 temp_ptr = (char *)strtok(NULL, ")");
 221                 if (temp_ptr == NULL)
 222                         die(STATE_CRITICAL, _("Invalid response from server\n"));
 223                 else
 224                         processes = strtod(temp_ptr, NULL);
 225
 226                 if (check_critical_value && (processes >= critical_value))
 227                         result = STATE_CRITICAL;
 228                 else if (check_warning_value && (processes >= warning_value))
 229                         result = STATE_WARNING;
 230
 231                 die(result, _("Process %s - %d instance%s of %s running"), state_text(result), processes, (processes == 1) ? "" : "s",
 232                         process_name);
 233                 break;
 234
 235         case UPTIME:
 236
 237                 if (result != STATE_OK)
 238                         return result;
 239
 240                 uptime_raw_hours = strtod(recv_buffer, NULL);
 241                 uptime_raw_minutes = (unsigned long)(uptime_raw_hours * 60.0);
 242
 243                 if (check_critical_value && (uptime_raw_minutes <= critical_value))
 244                         result = STATE_CRITICAL;
 245                 else if (check_warning_value && (uptime_raw_minutes <= warning_value))
 246                         result = STATE_WARNING;
 247
 248                 uptime_days = uptime_raw_minutes / 1440;
 249                 uptime_raw_minutes %= 1440;
 250                 uptime_hours = uptime_raw_minutes / 60;
 251                 uptime_raw_minutes %= 60;
 252                 uptime_minutes = uptime_raw_minutes;
 253
 254                 die(result, _("Uptime %s - Up %d days %d hours %d minutes"), state_text(result), uptime_days, uptime_hours, uptime_minutes);
 255                 break;
 256
 257         default:
 258                 die(STATE_UNKNOWN, _("Nothing to check!\n"));
 259                 break;
 260         }
 261 }
 262
 263 /* process command-line arguments */
 264 int process_arguments(int argc, char **argv) {
 265         int c;
 266
 267         int option = 0;
 268         static struct option longopts[] = {
 269                 {"port", required_argument, 0, 'p'},    {"timeout", required_argument, 0, 't'},  {"critical", required_argument, 0, 'c'},
 270                 {"warning", required_argument, 0, 'w'}, {"variable", required_argument, 0, 'v'}, {"hostname", required_argument, 0, 'H'},
 271                 {"version", no_argument, 0, 'V'},       {"help", no_argument, 0, 'h'},           {0, 0, 0, 0}};
 272
 273         /* no options were supplied */
 274         if (argc < 2)
 275                 return ERROR;
 276
 277         /* backwards compatibility */
 278         if (!is_option(argv[1])) {
 279                 server_address = argv[1];
 280                 argv[1] = argv[0];
 281                 argv = &argv[1];
 282                 argc--;
 283         }
 284
 285         for (c = 1; c < argc; c++) {
 286                 if (strcmp("-to", argv[c]) == 0)
 287                         strcpy(argv[c], "-t");
 288                 else if (strcmp("-wv", argv[c]) == 0)
 289                         strcpy(argv[c], "-w");
 290                 else if (strcmp("-cv", argv[c]) == 0)
 291                         strcpy(argv[c], "-c");
 292         }
 293
 294         while (1) {
 295                 c = getopt_long(argc, argv, "+hVH:t:c:w:p:v:", longopts, &option);
 296
 297                 if (c == -1 || c == EOF || c == 1)
 298                         break;
 299
 300                 switch (c) {
 301                 case '?': /* print short usage statement if args not parsable */
 302                         usage5();
 303                 case 'h': /* help */
 304                         print_help();
 305                         exit(STATE_UNKNOWN);
 306                 case 'V': /* version */
 307                         print_revision(progname, NP_VERSION);
 308                         exit(STATE_UNKNOWN);
 309                 case 'H': /* hostname */
 310                         server_address = optarg;
 311                         break;
 312                 case 'p': /* port */
 313                         if (is_intnonneg(optarg))
 314                                 server_port = atoi(optarg);
 315                         else
 316                                 die(STATE_UNKNOWN, _("Server port an integer\n"));
 317                         break;
 318                 case 'v': /* variable */
 319                         if (strcmp(optarg, "LOAD") == 0) {
 320                                 strcpy(send_buffer, "LOAD\r\nQUIT\r\n");
 321                                 if (strcmp(optarg, "LOAD1") == 0)
 322                                         vars_to_check = LOAD1;
 323                                 else if (strcmp(optarg, "LOAD5") == 0)
 324                                         vars_to_check = LOAD5;
 325                                 else if (strcmp(optarg, "LOAD15") == 0)
 326                                         vars_to_check = LOAD15;
 327                         } else if (strcmp(optarg, "UPTIME") == 0) {
 328                                 vars_to_check = UPTIME;
 329                                 strcpy(send_buffer, "UPTIME\r\n");
 330                         } else if (strstr(optarg, "PROC") == optarg) {
 331                                 vars_to_check = PROCS;
 332                                 process_name = strscpy(process_name, optarg + 4);
 333                                 sprintf(send_buffer, "PROCESS %s\r\n", process_name);
 334                         } else if (strstr(optarg, "NET") == optarg) {
 335                                 vars_to_check = NETSTAT;
 336                                 netstat_port = atoi(optarg + 3);
 337                                 sprintf(send_buffer, "NETSTAT %d\r\n", netstat_port);
 338                         } else if (strstr(optarg, "DPU") == optarg) {
 339                                 vars_to_check = DPU;
 340                                 strcpy(send_buffer, "DISKSPACE\r\n");
 341                                 disk_name = strscpy(disk_name, optarg + 3);
 342                         } else
 343                                 return ERROR;
 344                         break;
 345                 case 'w': /* warning threshold */
 346                         warning_value = strtoul(optarg, NULL, 10);
 347                         check_warning_value = true;
 348                         break;
 349                 case 'c': /* critical threshold */
 350                         critical_value = strtoul(optarg, NULL, 10);
 351                         check_critical_value = true;
 352                         break;
 353                 case 't': /* timeout */
 354                         socket_timeout = atoi(optarg);
 355                         if (socket_timeout <= 0)
 356                                 return ERROR;
 357                 }
 358         }
 359         return OK;
 360 }
 361
 362 void print_help(void) {
 363         char *myport;
 364         xasprintf(&myport, "%d", PORT);
 365
 366         print_revision(progname, NP_VERSION);
 367
 368         printf("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 369         printf(COPYRIGHT, copyright, email);
 370
 371         printf("%s\n", _("This plugin attempts to contact the Over-CR collector daemon running on the"));
 372         printf("%s\n", _("remote UNIX server in order to gather the requested system information."));
 373
 374         printf("\n\n");
 375
 376         print_usage();
 377
 378         printf(UT_HELP_VRSN);
 379         printf(UT_EXTRA_OPTS);
 380
 381         printf(UT_HOST_PORT, 'p', myport);
 382
 383         printf(" %s\n", "-w, --warning=INTEGER");
 384         printf("    %s\n", _("Threshold which will result in a warning status"));
 385         printf(" %s\n", "-c, --critical=INTEGER");
 386         printf("    %s\n", _("Threshold which will result in a critical status"));
 387         printf(" %s\n", "-v, --variable=STRING");
 388         printf("    %s\n", _("Variable to check.  Valid variables include:"));
 389         printf("    %s\n", _("LOAD1         = 1 minute average CPU load"));
 390         printf("    %s\n", _("LOAD5         = 5 minute average CPU load"));
 391         printf("    %s\n", _("LOAD15        = 15 minute average CPU load"));
 392         printf("    %s\n", _("DPU<filesys>  = percent used disk space on filesystem <filesys>"));
 393         printf("    %s\n", _("PROC<process> = number of running processes with name <process>"));
 394         printf("    %s\n", _("NET<port>     = number of active connections on TCP port <port>"));
 395         printf("    %s\n", _("UPTIME        = system uptime in seconds"));
 396
 397         printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 398
 399         printf(UT_VERBOSE);
 400
 401         printf("\n");
 402         printf("%s\n", _("This plugin requires that Eric Molitors' Over-CR collector daemon be"));
 403         printf("%s\n", _("running on the remote server."));
 404         printf("%s\n", _("Over-CR can be downloaded from http://www.molitor.org/overcr"));
 405         printf("%s\n", _("This plugin was tested with version 0.99.53 of the Over-CR collector"));
 406
 407         printf("\n");
 408         printf("%s\n", _("Notes:"));
 409         printf(" %s\n", _("For the available options, the critical threshold value should always be"));
 410         printf(" %s\n", _("higher than the warning threshold value, EXCEPT with the uptime variable"));
 411
 412         printf(UT_SUPPORT);
 413 }
 414
 415 void print_usage(void) {
 416         printf("%s\n", _("Usage:"));
 417         printf("%s -H host [-p port] [-v variable] [-w warning] [-c critical] [-t timeout]\n", progname);
 418 }