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