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pkg-monitoring-plugins/plugins/check_mysql_query.c

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C
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/******************************************************************************
*
* Nagios check_mysql_query plugin
*
* License: GPL
* Copyright (c) 2006 nagios-plugins team, after Didi Rieder (check_mysql)
*
* Last Modified: $Date: 2007-01-28 21:46:41 +0000 (Sun, 28 Jan 2007) $
*
* Description:
*
* This file contains the check_mysql_query plugin
*
* This plugin is for running arbitrary SQL and checking the results
*
* License Information:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* CHECK_MYSQL_QUERY.C
*
* $Id: check_mysql_query.c 1590 2007-01-28 21:46:41Z hweiss $
*
******************************************************************************/
const char *progname = "check_mysql_query";
const char *revision = "$Revision: 1590 $";
const char *copyright = "2006";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "utils.h"
#include "utils_base.h"
#include "netutils.h"
#include <mysql.h>
#include <errmsg.h>
char *db_user = NULL;
char *db_host = NULL;
char *db_pass = NULL;
char *db = NULL;
unsigned int db_port = MYSQL_PORT;
int process_arguments (int, char **);
int validate_arguments (void);
void print_help (void);
void print_usage (void);
char *sql_query = NULL;
int verbose = 0;
thresholds *my_thresholds = NULL;
int
main (int argc, char **argv)
{
MYSQL mysql;
MYSQL_RES *res;
MYSQL_ROW row;
double value;
char *error = NULL;
int status;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
/* initialize mysql */
mysql_init (&mysql);
mysql_options(&mysql,MYSQL_READ_DEFAULT_GROUP,"client");
/* establish a connection to the server and error checking */
if (!mysql_real_connect(&mysql,db_host,db_user,db_pass,db,db_port,NULL,0)) {
if (mysql_errno (&mysql) == CR_UNKNOWN_HOST)
die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_VERSION_ERROR)
die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_OUT_OF_MEMORY)
die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_IPSOCK_ERROR)
die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
else if (mysql_errno (&mysql) == CR_SOCKET_CREATE_ERROR)
die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), mysql_error (&mysql));
else
die (STATE_CRITICAL, "QUERY %s: %s\n", _("CRITICAL"), mysql_error (&mysql));
}
if (mysql_query (&mysql, sql_query) != 0) {
error = strdup(mysql_error(&mysql));
mysql_close (&mysql);
die (STATE_CRITICAL, "QUERY %s: %s - %s\n", _("CRITICAL"), _("Error with query"), error);
}
/* store the result */
if ( (res = mysql_store_result (&mysql)) == NULL) {
error = strdup(mysql_error(&mysql));
mysql_close (&mysql);
die (STATE_CRITICAL, "QUERY %s: Error with store_result - %s\n", _("CRITICAL"), error);
}
/* Check there is some data */
if (mysql_num_rows(res) == 0) {
mysql_close(&mysql);
die (STATE_WARNING, "QUERY %s: %s\n", _("WARNING"), _("No rows returned"));
}
/* fetch the first row */
if ( (row = mysql_fetch_row (res)) == NULL) {
error = strdup(mysql_error(&mysql));
mysql_free_result (res);
mysql_close (&mysql);
die (STATE_CRITICAL, "QUERY %s: Fetch row error - %s\n", _("CRITICAL"), error);
}
/* free the result */
mysql_free_result (res);
/* close the connection */
mysql_close (&mysql);
if (! is_numeric(row[0])) {
die (STATE_CRITICAL, "QUERY %s: %s - '%s'\n", _("CRITICAL"), _("Is not a numeric"), row[0]);
}
value = strtod(row[0], NULL);
if (verbose >= 3)
printf("mysql result: %f\n", value);
status = get_status(value, my_thresholds);
if (status == STATE_OK) {
printf("QUERY %s: ", _("OK"));
} else if (status == STATE_WARNING) {
printf("QUERY %s: ", _("WARNING"));
} else if (status == STATE_CRITICAL) {
printf("QUERY %s: ", _("CRITICAL"));
}
printf(_("'%s' returned %f"), sql_query, value);
printf("\n");
return status;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
char *warning = NULL;
char *critical = NULL;
int option = 0;
static struct option longopts[] = {
{"hostname", required_argument, 0, 'H'},
{"database", required_argument, 0, 'd'},
{"username", required_argument, 0, 'u'},
{"password", required_argument, 0, 'p'},
{"port", required_argument, 0, 'P'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
{"query", required_argument, 0, 'q'},
{"warning", required_argument, 0, 'w'},
{"critical", required_argument, 0, 'c'},
{0, 0, 0, 0}
};
if (argc < 1)
return ERROR;
while (1) {
c = getopt_long (argc, argv, "hvVSP:p:u:d:H:q:w:c:", longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case 'H': /* hostname */
if (is_host (optarg)) {
db_host = optarg;
}
else {
usage2 (_("Invalid hostname/address"), optarg);
}
break;
case 'd': /* hostname */
db = optarg;
break;
case 'u': /* username */
db_user = optarg;
break;
case 'p': /* authentication information: password */
asprintf(&db_pass, "%s", optarg);
/* Delete the password from process list */
while (*optarg != '\0') {
*optarg = 'X';
optarg++;
}
break;
case 'P': /* critical time threshold */
db_port = atoi (optarg);
break;
case 'v':
verbose++;
break;
case 'V': /* version */
print_revision (progname, revision);
exit (STATE_OK);
case 'h': /* help */
print_help ();
exit (STATE_OK);
case 'q':
asprintf(&sql_query, "%s", optarg);
break;
case 'w':
warning = optarg;
break;
case 'c':
critical = optarg;
break;
case '?': /* help */
usage5 ();
}
}
c = optind;
set_thresholds(&my_thresholds, warning, critical);
return validate_arguments ();
}
int
validate_arguments (void)
{
if (sql_query == NULL)
usage("Must specify a SQL query to run");
if (db_user == NULL)
db_user = strdup("");
if (db_host == NULL)
db_host = strdup("");
if (db_pass == NULL)
db_pass == strdup("");
if (db == NULL)
db = strdup("");
return OK;
}
void
print_help (void)
{
char *myport;
asprintf (&myport, "%d", MYSQL_PORT);
print_revision (progname, revision);
printf (_(COPYRIGHT), copyright, email);
printf ("%s\n", _("This program checks a query result against threshold levels"));
printf ("\n\n");
print_usage ();
printf (_(UT_HELP_VRSN));
printf (" -q, --query=STRING\n");
printf (" %s\n", _("SQL query to run. Only first column in first row will be read"));
printf (_(UT_WARN_CRIT_RANGE));
printf (_(UT_HOST_PORT), 'P', myport);
printf (" -d, --database=STRING\n");
printf (" %s\n", _("Database to check"));
printf (" -u, --username=STRING\n");
printf (" %s\n", _("Username to login with"));
printf (" -p, --password=STRING\n");
printf (" %s\n", _("Password to login with"));
printf (" ==> %s <==\n", _("IMPORTANT: THIS FORM OF AUTHENTICATION IS NOT SECURE!!!"));
printf ("\n");
printf ("%s\n", _("A query is required. The result from the query should be numeric."));
printf ("%s\n", _("For extra security, create a user with minimal access."));
printf (_(UT_SUPPORT));
}
void
print_usage (void)
{
printf (_("Usage:"));
printf ("%s -q SQL_query [-w warn] [-c crit]\n",progname);
printf ("[-d database] [-H host] [-P port] [-u user] [-p password]\n");
}
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