plugins/check_overcr.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_overcr plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 2000-2007 Nagios 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 = "2000-2007";
  34 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  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 int check_warning_value = FALSE;
  60 int 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
  74 main (int argc, char **argv)
  75 {
  76         int result = STATE_UNKNOWN;
  77         char recv_buffer[MAX_INPUT_BUFFER];
  78         char temp_buffer[MAX_INPUT_BUFFER];
  79         char *temp_ptr = NULL;
  80         int found_disk = FALSE;
  81         unsigned long percent_used_disk_space = 100;
  82         double load;
  83         double load_1min;
  84         double load_5min;
  85         double load_15min;
  86         int port_connections = 0;
  87         int processes = 0;
  88         double uptime_raw_hours;
  89         int uptime_raw_minutes = 0;
  90         int uptime_days = 0;
  91         int uptime_hours = 0;
  92         int uptime_minutes = 0;
  93
  94         setlocale (LC_ALL, "");
  95         bindtextdomain (PACKAGE, LOCALEDIR);
  96         textdomain (PACKAGE);
  97
  98         /* Parse extra opts if any */
  99         argv=np_extra_opts (&argc, argv, progname);
 100
 101         if (process_arguments (argc, argv) == ERROR)
 102                 usage4 (_("Could not parse arguments"));
 103
 104         /* initialize alarm signal handling */
 105         signal (SIGALRM, socket_timeout_alarm_handler);
 106
 107         /* set socket timeout */
 108         alarm (socket_timeout);
 109
 110         result = process_tcp_request2 (server_address,
 111                                        server_port,
 112                                        send_buffer,
 113                                        recv_buffer,
 114                                        sizeof (recv_buffer));
 115
 116         switch (vars_to_check) {
 117
 118         case LOAD1:
 119         case LOAD5:
 120         case LOAD15:
 121
 122                 if (result != STATE_OK)
 123                         die (result, _("Unknown error fetching load data\n"));
 124
 125                 temp_ptr = (char *) strtok (recv_buffer, "\r\n");
 126                 if (temp_ptr == NULL)
 127                         die (STATE_CRITICAL, _("Invalid response from server - no load information\n"));
 128                 else
 129                         load_1min = 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 1\n"));
 134                 else
 135                         load_5min = strtod (temp_ptr, NULL);
 136
 137                 temp_ptr = (char *) strtok (NULL, "\r\n");
 138                 if (temp_ptr == NULL)
 139                         die (STATE_CRITICAL, _("Invalid response from server after load 5\n"));
 140                 else
 141                         load_15min = strtod (temp_ptr, NULL);
 142
 143                 switch (vars_to_check) {
 144                 case LOAD1:
 145                         strcpy (temp_buffer, "1");
 146                         load = load_1min;
 147                         break;
 148                 case LOAD5:
 149                         strcpy (temp_buffer, "5");
 150                         load = load_5min;
 151                         break;
 152                 default:
 153                         strcpy (temp_buffer, "15");
 154                         load = load_15min;
 155                         break;
 156                 }
 157
 158                 if (check_critical_value == TRUE && (load >= critical_value))
 159                         result = STATE_CRITICAL;
 160                 else if (check_warning_value == TRUE && (load >= warning_value))
 161                         result = STATE_WARNING;
 162
 163                 die (result,
 164                           _("Load %s - %s-min load average = %0.2f"),
 165                                                          state_text(result),
 166                           temp_buffer,
 167                           load);
 168
 169                         break;
 170
 171         case DPU:
 172
 173                 if (result != STATE_OK)
 174                         die (result, _("Unknown error fetching disk data\n"));
 175
 176                 for (temp_ptr = (char *) strtok (recv_buffer, " ");
 177                      temp_ptr != NULL;
 178                      temp_ptr = (char *) strtok (NULL, " ")) {
 179
 180                         if (!strcmp (temp_ptr, disk_name)) {
 181                                 found_disk = TRUE;
 182                                 temp_ptr = (char *) strtok (NULL, "%");
 183                                 if (temp_ptr == NULL)
 184                                         die (STATE_CRITICAL, _("Invalid response from server\n"));
 185                                 else
 186                                         percent_used_disk_space = strtoul (temp_ptr, NULL, 10);
 187                                 break;
 188                         }
 189
 190                         temp_ptr = (char *) strtok (NULL, "\r\n");
 191                 }
 192
 193                 /* error if we couldn't find the info for the disk */
 194                 if (found_disk == FALSE)
 195                         die (STATE_CRITICAL,
 196                                    "CRITICAL - Disk '%s' non-existent or not mounted",
 197                                    disk_name);
 198
 199                 if (check_critical_value == TRUE && (percent_used_disk_space >= critical_value))
 200                         result = STATE_CRITICAL;
 201                 else if (check_warning_value == TRUE && (percent_used_disk_space >= warning_value))
 202                         result = STATE_WARNING;
 203
 204                 die (result, "Disk %s - %lu%% used on %s", state_text(result), percent_used_disk_space, disk_name);
 205
 206                 break;
 207
 208         case NETSTAT:
 209
 210                 if (result != STATE_OK)
 211                         die (result, _("Unknown error fetching network status\n"));
 212                 else
 213                         port_connections = strtod (recv_buffer, NULL);
 214
 215                 if (check_critical_value == TRUE && (port_connections >= critical_value))
 216                         result = STATE_CRITICAL;
 217                 else if (check_warning_value == TRUE && (port_connections >= warning_value))
 218                         result = STATE_WARNING;
 219
 220                 die (result,
 221                            _("Net %s - %d connection%s on port %d"),
 222                            state_text(result),
 223                            port_connections,
 224                            (port_connections == 1) ? "" : "s",
 225                            netstat_port);
 226
 227                 break;
 228
 229         case PROCS:
 230
 231                 if (result != STATE_OK)
 232                         die (result, _("Unknown error fetching process status\n"));
 233
 234                 temp_ptr = (char *) strtok (recv_buffer, "(");
 235                 if (temp_ptr == NULL)
 236                         die (STATE_CRITICAL, _("Invalid response from server\n"));
 237
 238                 temp_ptr = (char *) strtok (NULL, ")");
 239                 if (temp_ptr == NULL)
 240                         die (STATE_CRITICAL, _("Invalid response from server\n"));
 241                 else
 242                         processes = strtod (temp_ptr, NULL);
 243
 244                 if (check_critical_value == TRUE && (processes >= critical_value))
 245                         result = STATE_CRITICAL;
 246                 else if (check_warning_value == TRUE && (processes >= warning_value))
 247                         result = STATE_WARNING;
 248
 249                 die (result,
 250                            _("Process %s - %d instance%s of %s running"),
 251                            state_text(result),
 252                            processes,
 253                            (processes == 1) ? "" : "s",
 254                            process_name);
 255                 break;
 256
 257         case UPTIME:
 258
 259                 if (result != STATE_OK)
 260                         return result;
 261
 262                 uptime_raw_hours = strtod (recv_buffer, NULL);
 263                 uptime_raw_minutes = (unsigned long) (uptime_raw_hours * 60.0);
 264
 265                 if (check_critical_value == TRUE && (uptime_raw_minutes <= critical_value))
 266                         result = STATE_CRITICAL;
 267                 else if (check_warning_value == TRUE && (uptime_raw_minutes <= warning_value))
 268                         result = STATE_WARNING;
 269
 270                 uptime_days = uptime_raw_minutes / 1440;
 271                 uptime_raw_minutes %= 1440;
 272                 uptime_hours = uptime_raw_minutes / 60;
 273                 uptime_raw_minutes %= 60;
 274                 uptime_minutes = uptime_raw_minutes;
 275
 276                 die (result,
 277                            _("Uptime %s - Up %d days %d hours %d minutes"),
 278                            state_text(result),
 279                            uptime_days,
 280                            uptime_hours,
 281                            uptime_minutes);
 282                 break;
 283
 284         default:
 285                 die (STATE_UNKNOWN, _("Nothing to check!\n"));
 286                 break;
 287         }
 288 }
 289
 290
 291 /* process command-line arguments */
 292 int
 293 process_arguments (int argc, char **argv)
 294 {
 295         int c;
 296
 297         int option = 0;
 298         static struct option longopts[] = {
 299                 {"port", required_argument, 0, 'p'},
 300                 {"timeout", required_argument, 0, 't'},
 301                 {"critical", required_argument, 0, 'c'},
 302                 {"warning", required_argument, 0, 'w'},
 303                 {"variable", required_argument, 0, 'v'},
 304                 {"hostname", required_argument, 0, 'H'},
 305                 {"version", no_argument, 0, 'V'},
 306                 {"help", no_argument, 0, 'h'},
 307                 {0, 0, 0, 0}
 308         };
 309
 310         /* no options were supplied */
 311         if (argc < 2)
 312                 return ERROR;
 313
 314         /* backwards compatibility */
 315         if (!is_option (argv[1])) {
 316                 server_address = argv[1];
 317                 argv[1] = argv[0];
 318                 argv = &argv[1];
 319                 argc--;
 320         }
 321
 322         for (c = 1; c < argc; c++) {
 323                 if (strcmp ("-to", argv[c]) == 0)
 324                         strcpy (argv[c], "-t");
 325                 else if (strcmp ("-wv", argv[c]) == 0)
 326                         strcpy (argv[c], "-w");
 327                 else if (strcmp ("-cv", argv[c]) == 0)
 328                         strcpy (argv[c], "-c");
 329         }
 330
 331         while (1) {
 332                 c = getopt_long (argc, argv, "+hVH:t:c:w:p:v:", longopts,
 333                                                                          &option);
 334
 335                 if (c == -1 || c == EOF || c == 1)
 336                         break;
 337
 338                 switch (c) {
 339                 case '?':                                                                       /* print short usage statement if args not parsable */
 340                         usage5 ();
 341                 case 'h':                                                                       /* help */
 342                         print_help ();
 343                         exit (STATE_OK);
 344                 case 'V':                                                                       /* version */
 345                         print_revision (progname, NP_VERSION);
 346                         exit (STATE_OK);
 347                 case 'H':                                                                       /* hostname */
 348                         server_address = optarg;
 349                         break;
 350                 case 'p':                                                                       /* port */
 351                         if (is_intnonneg (optarg))
 352                                 server_port = atoi (optarg);
 353                         else
 354                                 die (STATE_UNKNOWN,
 355                                                                          _("Server port an integer\n"));
 356                         break;
 357                 case 'v':                                                                       /* variable */
 358                         if (strcmp (optarg, "LOAD") == 0) {
 359                                 strcpy (send_buffer, "LOAD\r\nQUIT\r\n");
 360                                 if (strcmp (optarg, "LOAD1") == 0)
 361                                         vars_to_check = LOAD1;
 362                                 else if (strcmp (optarg, "LOAD5") == 0)
 363                                         vars_to_check = LOAD5;
 364                                 else if (strcmp (optarg, "LOAD15") == 0)
 365                                         vars_to_check = LOAD15;
 366                         }
 367                         else if (strcmp (optarg, "UPTIME") == 0) {
 368                                 vars_to_check = UPTIME;
 369                                 strcpy (send_buffer, "UPTIME\r\n");
 370                         }
 371                         else if (strstr (optarg, "PROC") == optarg) {
 372                                 vars_to_check = PROCS;
 373                                 process_name = strscpy (process_name, optarg + 4);
 374                                 sprintf (send_buffer, "PROCESS %s\r\n", process_name);
 375                         }
 376                         else if (strstr (optarg, "NET") == optarg) {
 377                                 vars_to_check = NETSTAT;
 378                                 netstat_port = atoi (optarg + 3);
 379                                 sprintf (send_buffer, "NETSTAT %d\r\n", netstat_port);
 380                         }
 381                         else if (strstr (optarg, "DPU") == optarg) {
 382                                 vars_to_check = DPU;
 383                                 strcpy (send_buffer, "DISKSPACE\r\n");
 384                                 disk_name = strscpy (disk_name, optarg + 3);
 385                         }
 386                         else
 387                                 return ERROR;
 388                         break;
 389                 case 'w':                                                                       /* warning threshold */
 390                         warning_value = strtoul (optarg, NULL, 10);
 391                         check_warning_value = TRUE;
 392                         break;
 393                 case 'c':                                                                       /* critical threshold */
 394                         critical_value = strtoul (optarg, NULL, 10);
 395                         check_critical_value = TRUE;
 396                         break;
 397                 case 't':                                                                       /* timeout */
 398                         socket_timeout = atoi (optarg);
 399                         if (socket_timeout <= 0)
 400                                 return ERROR;
 401                 }
 402
 403         }
 404         return OK;
 405 }
 406
 407
 408 void
 409 print_help (void)
 410 {
 411         char *myport;
 412         asprintf (&myport, "%d", PORT);
 413
 414         print_revision (progname, NP_VERSION);
 415
 416         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 417         printf (COPYRIGHT, copyright, email);
 418
 419         printf ("%s\n", _("This plugin attempts to contact the Over-CR collector daemon running on the"));
 420   printf ("%s\n", _("remote UNIX server in order to gather the requested system information."));
 421
 422   printf ("\n\n");
 423
 424         print_usage ();
 425
 426         printf (UT_HELP_VRSN);
 427         printf (UT_EXTRA_OPTS);
 428
 429         printf (UT_HOST_PORT, 'p', myport);
 430
 431   printf (" %s\n", "-w, --warning=INTEGER");
 432   printf ("    %s\n", _("Threshold which will result in a warning status"));
 433   printf (" %s\n", "-c, --critical=INTEGER");
 434   printf ("    %s\n", _("Threshold which will result in a critical status"));
 435   printf (" %s\n", "-v, --variable=STRING");
 436   printf ("    %s\n", _("Variable to check.  Valid variables include:"));
 437   printf ("    %s\n", _("LOAD1         = 1 minute average CPU load"));
 438   printf ("    %s\n", _("LOAD5         = 5 minute average CPU load"));
 439   printf ("    %s\n", _("LOAD15        = 15 minute average CPU load"));
 440   printf ("    %s\n", _("DPU<filesys>  = percent used disk space on filesystem <filesys>"));
 441   printf ("    %s\n", _("PROC<process> = number of running processes with name <process>"));
 442   printf ("    %s\n", _("NET<port>     = number of active connections on TCP port <port>"));
 443   printf ("    %s\n", _("UPTIME        = system uptime in seconds"));
 444
 445         printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 446
 447   printf (UT_VERBOSE);
 448
 449   printf ("\n");
 450   printf ("%s\n", _("This plugin requires that Eric Molitors' Over-CR collector daemon be"));
 451   printf ("%s\n", _("running on the remote server."));
 452   printf ("%s\n", _("Over-CR can be downloaded from http://www.molitor.org/overcr"));
 453   printf ("%s\n", _("This plugin was tested with version 0.99.53 of the Over-CR collector"));
 454
 455   printf ("\n");
 456   printf ("%s\n", _("Notes:"));
 457   printf (" %s\n", _("For the available options, the critical threshold value should always be"));
 458   printf (" %s\n", _("higher than the warning threshold value, EXCEPT with the uptime variable"));
 459 #ifdef NP_EXTRA_OPTS
 460   printf ("\n");
 461   printf (UT_EXTRA_OPTS_NOTES);
 462 #endif
 463
 464   printf (UT_SUPPORT);
 465 }
 466
 467
 468 void
 469 print_usage (void)
 470 {
 471   printf (_("Usage:"));
 472         printf ("%s -H host [-p port] [-v variable] [-w warning] [-c critical] [-t timeout]\n", progname);
 473 }