plugins/check_mysql_query.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_mysql_query plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 2006-2009 Nagios Plugins Development Team
   7 * Original code from check_mysql, copyright 1999 Didi Rieder
   8 *
   9 * Description:
  10 *
  11 * This file contains the check_mysql_query plugin
  12 *
  13 * This plugin is for running arbitrary SQL and checking the results
  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_mysql_query";
  33 const char *copyright = "1999-2007";
  34 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  35
  36 #include "common.h"
  37 #include "utils.h"
  38 #include "utils_base.h"
  39 #include "netutils.h"
  40
  41 #include <mysql.h>
  42 #include <errmsg.h>
  43
  44 char *db_user = NULL;
  45 char *db_host = NULL;
  46 char *db_socket = NULL;
  47 char *db_pass = NULL;
  48 char *db = NULL;
  49 unsigned int db_port = MYSQL_PORT;
  50
  51 int process_arguments (int, char **);
  52 int validate_arguments (void);
  53 void print_help (void);
  54 void print_usage (void);
  55
  56 char *sql_query = NULL;
  57 int verbose = 0;
  58 thresholds *my_thresholds = NULL;
  59
  60
  61 int
  62 main (int argc, char **argv)
  63 {
  64
  65         MYSQL mysql;
  66         MYSQL_RES *res;
  67         MYSQL_ROW row;
  68
  69         double value;
  70         char *error = NULL;
  71         int status;
  72
  73         setlocale (LC_ALL, "");
  74         bindtextdomain (PACKAGE, LOCALEDIR);
  75         textdomain (PACKAGE);
  76
  77         /* Parse extra opts if any */
  78         argv=np_extra_opts (&argc, argv, progname);
  79
  80         if (process_arguments (argc, argv) == ERROR)
  81                 usage4 (_("Could not parse arguments"));
  82
  83         /* initialize mysql  */
  84         mysql_init (&mysql);
  85
  86         mysql_options(&mysql,MYSQL_READ_DEFAULT_GROUP,"client");
  87
  88         /* establish a connection to the server and error checking */
  89         if (!mysql_real_connect(&mysql,db_host,db_user,db_pass,db,db_port,db_socket,0)) {
  90                 if (mysql_errno (&mysql) == CR_UNKNOWN_HOST)
  91                         die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
  92                 else if (mysql_errno (&mysql) == CR_VERSION_ERROR)
  93                         die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
  94                 else if (mysql_errno (&mysql) == CR_OUT_OF_MEMORY)
  95                         die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
  96                 else if (mysql_errno (&mysql) == CR_IPSOCK_ERROR)
  97                         die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
  98                 else if (mysql_errno (&mysql) == CR_SOCKET_CREATE_ERROR)
  99                         die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
 100                 else
 101                         die (STATE_CRITICAL, "QUERY %s: %s\n", _("CRITICAL"), mysql_error (&mysql));
 102         }
 103
 104         if (mysql_query (&mysql, sql_query) != 0) {
 105                 error = strdup(mysql_error(&mysql));
 106                 mysql_close (&mysql);
 107                 die (STATE_CRITICAL, "QUERY %s: %s - %s\n", _("CRITICAL"), _("Error with query"), error);
 108         }
 109
 110         /* store the result */
 111         if ( (res = mysql_store_result (&mysql)) == NULL) {
 112                 error = strdup(mysql_error(&mysql));
 113                 mysql_close (&mysql);
 114                 die (STATE_CRITICAL, "QUERY %s: Error with store_result - %s\n", _("CRITICAL"), error);
 115         }
 116
 117         /* Check there is some data */
 118         if (mysql_num_rows(res) == 0) {
 119                 mysql_close(&mysql);
 120                 die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), _("No rows returned"));
 121         }
 122
 123         /* fetch the first row */
 124         if ( (row = mysql_fetch_row (res)) == NULL) {
 125                 error = strdup(mysql_error(&mysql));
 126                 mysql_free_result (res);
 127                 mysql_close (&mysql);
 128                 die (STATE_CRITICAL, "QUERY %s: Fetch row error - %s\n", _("CRITICAL"), error);
 129         }
 130
 131         /* free the result */
 132         mysql_free_result (res);
 133
 134         /* close the connection */
 135         mysql_close (&mysql);
 136
 137         if (! is_numeric(row[0])) {
 138                 die (STATE_CRITICAL, "QUERY %s: %s - '%s'\n", _("CRITICAL"), _("Is not a numeric"), row[0]);
 139         }
 140
 141         value = strtod(row[0], NULL);
 142
 143         if (verbose >= 3)
 144                 printf("mysql result: %f\n", value);
 145
 146         status = get_status(value, my_thresholds);
 147
 148         if (status == STATE_OK) {
 149                 printf("QUERY %s: ", _("OK"));
 150         } else if (status == STATE_WARNING) {
 151                 printf("QUERY %s: ", _("WARNING"));
 152         } else if (status == STATE_CRITICAL) {
 153                 printf("QUERY %s: ", _("CRITICAL"));
 154         }
 155         printf(_("'%s' returned %f"), sql_query, value);
 156         printf("\n");
 157
 158         return status;
 159 }
 160
 161
 162 /* process command-line arguments */
 163 int
 164 process_arguments (int argc, char **argv)
 165 {
 166         int c;
 167         char *warning = NULL;
 168         char *critical = NULL;
 169
 170         int option = 0;
 171         static struct option longopts[] = {
 172                 {"hostname", required_argument, 0, 'H'},
 173                 {"socket", required_argument, 0, 's'},
 174                 {"database", required_argument, 0, 'd'},
 175                 {"username", required_argument, 0, 'u'},
 176                 {"password", required_argument, 0, 'p'},
 177                 {"port", required_argument, 0, 'P'},
 178                 {"verbose", no_argument, 0, 'v'},
 179                 {"version", no_argument, 0, 'V'},
 180                 {"help", no_argument, 0, 'h'},
 181                 {"query", required_argument, 0, 'q'},
 182                 {"warning", required_argument, 0, 'w'},
 183                 {"critical", required_argument, 0, 'c'},
 184                 {0, 0, 0, 0}
 185         };
 186
 187         if (argc < 1)
 188                 return ERROR;
 189
 190         while (1) {
 191                 c = getopt_long (argc, argv, "hvVP:p:u:d:H:s:q:w:c:", longopts, &option);
 192
 193                 if (c == -1 || c == EOF)
 194                         break;
 195
 196                 switch (c) {
 197                 case 'H':                                                                       /* hostname */
 198                         if (is_host (optarg)) {
 199                                 db_host = optarg;
 200                         }
 201                         else {
 202                                 usage2 (_("Invalid hostname/address"), optarg);
 203                         }
 204                         break;
 205                 case 's':                                                                       /* socket */
 206                         db_socket = optarg;
 207                         break;
 208                 case 'd':                                                                       /* database */
 209                         db = optarg;
 210                         break;
 211                 case 'u':                                                                       /* username */
 212                         db_user = optarg;
 213                         break;
 214                 case 'p':                                                                       /* authentication information: password */
 215                         db_pass = strdup(optarg);
 216
 217                         /* Delete the password from process list */
 218                         while (*optarg != '\0') {
 219                                 *optarg = 'X';
 220                                 optarg++;
 221                         }
 222                         break;
 223                 case 'P':                                                                       /* critical time threshold */
 224                         db_port = atoi (optarg);
 225                         break;
 226                 case 'v':
 227                         verbose++;
 228                         break;
 229                 case 'V':                                                                       /* version */
 230                         print_revision (progname, NP_VERSION);
 231                         exit (STATE_OK);
 232                 case 'h':                                                                       /* help */
 233                         print_help ();
 234                         exit (STATE_OK);
 235                 case 'q':
 236                         asprintf(&sql_query, "%s", optarg);
 237                         break;
 238                 case 'w':
 239                         warning = optarg;
 240                         break;
 241                 case 'c':
 242                         critical = optarg;
 243                         break;
 244                 case '?':                                                                       /* help */
 245                         usage5 ();
 246                 }
 247         }
 248
 249         c = optind;
 250
 251         set_thresholds(&my_thresholds, warning, critical);
 252
 253         return validate_arguments ();
 254 }
 255
 256
 257 int
 258 validate_arguments (void)
 259 {
 260         if (sql_query == NULL)
 261                 usage("Must specify a SQL query to run");
 262
 263         if (db_user == NULL)
 264                 db_user = strdup("");
 265
 266         if (db_host == NULL)
 267                 db_host = strdup("");
 268
 269         if (db == NULL)
 270                 db = strdup("");
 271
 272         return OK;
 273 }
 274
 275
 276 void
 277 print_help (void)
 278 {
 279         char *myport;
 280         asprintf (&myport, "%d", MYSQL_PORT);
 281
 282         print_revision (progname, NP_VERSION);
 283
 284         printf (_(COPYRIGHT), copyright, email);
 285
 286         printf ("%s\n", _("This program checks a query result against threshold levels"));
 287
 288   printf ("\n\n");
 289
 290         print_usage ();
 291
 292         printf (UT_HELP_VRSN);
 293         printf (UT_EXTRA_OPTS);
 294         printf (" -q, --query=STRING\n");
 295         printf ("    %s\n", _("SQL query to run. Only first column in first row will be read"));
 296         printf (UT_WARN_CRIT_RANGE);
 297         printf (UT_HOST_PORT, 'P', myport);
 298         printf (" %s\n", "-s, --socket=STRING");
 299         printf ("    %s\n", _("Use the specified socket (has no effect if -H is used)"));
 300         printf (" -d, --database=STRING\n");
 301         printf ("    %s\n", _("Database to check"));
 302         printf (" -u, --username=STRING\n");
 303         printf ("    %s\n", _("Username to login with"));
 304         printf (" -p, --password=STRING\n");
 305         printf ("    %s\n", _("Password to login with"));
 306         printf ("    ==> %s <==\n", _("IMPORTANT: THIS FORM OF AUTHENTICATION IS NOT SECURE!!!"));
 307         printf ("    %s\n", _("Your clear-text password could be visible as a process table entry"));
 308
 309         printf ("\n");
 310         printf (" %s\n", _("A query is required. The result from the query should be numeric."));
 311         printf (" %s\n", _("For extra security, create a user with minimal access."));
 312
 313         printf ("\n");
 314         printf ("%s\n", _("Notes:"));
 315         printf (" %s\n", _("You must specify -p with an empty string to force an empty password,"));
 316         printf (" %s\n", _("overriding any my.cnf settings."));
 317
 318         printf (UT_SUPPORT);
 319 }
 320
 321
 322 void
 323 print_usage (void)
 324 {
 325   printf ("%s\n", _("Usage:"));
 326   printf (" %s -q SQL_query [-w warn] [-c crit] [-H host] [-P port] [-s socket]\n",progname);
 327   printf ("       [-d database] [-u user] [-p password]\n");
 328 }