1 files changed, 516 insertions, 0 deletions

diff --git a/plugins/check_dbi.c b/plugins/check_dbi.c
new file mode 100644
index 0000000..b52602c
--- /dev/null
+++ b/plugins/check_dbi.c
@@ -0,0 +1,516 @@
+/*****************************************************************************
+* 
+* Nagios check_dbi plugin
+* 
+* License: GPL
+* Copyright (c) 2011 Nagios Plugins Development Team
+* Author: Sebastian 'tokkee' Harl <sh@teamix.net>
+* 
+* Description:
+* 
+* This file contains the check_dbi plugin
+* 
+* Runs an arbitrary SQL command and checks the result.
+* 
+* 
+* 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 3 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, see <http://www.gnu.org/licenses/>.
+* 
+* 
+*****************************************************************************/
+
+const char *progname = "check_dbi";
+const char *copyright = "2011";
+const char *email = "nagiosplug-devel@lists.sourceforge.net";
+
+#include "common.h"
+#include "utils.h"
+
+#include "netutils.h"
+
+#include <dbi/dbi.h>
+
+#include <stdarg.h>
+
+typedef struct {
+        char *key;
+        char *value;
+} driver_option_t;
+
+char *host = NULL;
+int verbose = 0;
+
+char *warning_range = NULL;
+char *critical_range = NULL;
+thresholds *query_thresholds = NULL;
+
+char *np_dbi_driver = NULL;
+driver_option_t *np_dbi_options = NULL;
+int np_dbi_options_num = 0;
+char *np_dbi_database = NULL;
+char *np_dbi_query = NULL;
+
+int process_arguments (int, char **);
+int validate_arguments (void);
+void print_usage (void);
+void print_help (void);
+
+void np_dbi_print_error (dbi_conn, char *, ...);
+
+int do_query (dbi_conn, double *);
+
+int
+main (int argc, char **argv)
+{
+        int status = STATE_UNKNOWN;
+
+        dbi_driver driver;
+        dbi_conn conn;
+
+        struct timeval start_timeval, end_timeval;
+        double elapsed_time;
+
+        double query_val = 0.0;
+
+        int i;
+
+        setlocale (LC_ALL, "");
+        bindtextdomain (PACKAGE, LOCALEDIR);
+        textdomain (PACKAGE);
+
+        /* Parse extra opts if any */
+        argv = np_extra_opts (&argc, argv, progname);
+
+        if (process_arguments (argc, argv) == ERROR)
+                usage4 (_("Could not parse arguments"));
+
+        /* Set signal handling and alarm */
+        if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR) {
+                usage4 (_("Cannot catch SIGALRM"));
+        }
+        alarm (timeout_interval);
+
+        if (verbose > 2)
+                printf ("Initializing DBI\n");
+
+        if (dbi_initialize (NULL) < 0) {
+                printf ("UNKNOWN - failed to initialize DBI.\n");
+                return STATE_UNKNOWN;
+        }
+
+        if (verbose)
+                printf ("Opening DBI driver '%s'\n", np_dbi_driver);
+
+        driver = dbi_driver_open (np_dbi_driver);
+        if (! driver) {
+                printf ("UNKNOWN - failed to open DBI driver '%s'; possibly it's not installed.\n",
+                                np_dbi_driver);
+
+                printf ("Known drivers:\n");
+                for (driver = dbi_driver_list (NULL); driver; driver = dbi_driver_list (driver)) {
+                        printf (" - %s\n", dbi_driver_get_name (driver));
+                }
+                return STATE_UNKNOWN;
+        }
+
+        /* make a connection to the database */
+        gettimeofday (&start_timeval, NULL);
+
+        conn = dbi_conn_open (driver);
+        if (! conn) {
+                printf ("UNKNOWN - failed top open connection object.\n");
+                dbi_conn_close (conn);
+                return STATE_UNKNOWN;
+        }
+
+        for (i = 0; i < np_dbi_options_num; ++i) {
+                const char *opt;
+
+                if (verbose > 1)
+                        printf ("Setting DBI driver option '%s' to '%s'\n",
+                                        np_dbi_options[i].key, np_dbi_options[i].value);
+
+                if (! dbi_conn_set_option (conn, np_dbi_options[i].key, np_dbi_options[i].value))
+                        continue;
+                /* else: status != 0 */
+
+                np_dbi_print_error (conn, "UNKNOWN - failed to set option '%s' to '%s'",
+                                np_dbi_options[i].key, np_dbi_options[i].value);
+                printf ("Known driver options:\n");
+
+                for (opt = dbi_conn_get_option_list (conn, NULL); opt;
+                                opt = dbi_conn_get_option_list (conn, opt)) {
+                        printf (" - %s\n", opt);
+                }
+                dbi_conn_close (conn);
+                return STATE_UNKNOWN;
+        }
+
+        if (host) {
+                if (verbose > 1)
+                        printf ("Setting DBI driver option 'host' to '%s'\n", host);
+                dbi_conn_set_option (conn, "host", host);
+        }
+
+        if (verbose) {
+                const char *dbname, *host;
+
+                dbname = dbi_conn_get_option (conn, "dbname");
+                host = dbi_conn_get_option (conn, "host");
+
+                if (! dbname)
+                        dbname = "<unspecified>";
+                if (! host)
+                        host = "<unspecified>";
+
+                printf ("Connecting to database '%s' at host '%s'\n",
+                                dbname, host);
+        }
+
+        if (dbi_conn_connect (conn) < 0) {
+                np_dbi_print_error (conn, "UNKOWN - failed to connect to database");
+                return STATE_UNKNOWN;
+        }
+
+        gettimeofday (&end_timeval, NULL);
+        while (start_timeval.tv_usec > end_timeval.tv_usec) {
+                --end_timeval.tv_sec;
+                end_timeval.tv_usec += 1000000;
+        }
+        elapsed_time = (double)(end_timeval.tv_sec - start_timeval.tv_sec)
+                + (double)(end_timeval.tv_usec - start_timeval.tv_usec) / 1000000.0;
+
+        if (verbose)
+                printf("Time elapsed: %f\n", elapsed_time);
+
+        /* select a database */
+        if (np_dbi_database) {
+                if (verbose > 1)
+                        printf ("Selecting database '%s'\n", np_dbi_database);
+
+                if (dbi_conn_select_db (conn, np_dbi_database)) {
+                        np_dbi_print_error (conn, "UNKOWN - failed to select database '%s'",
+                                        np_dbi_database);
+                        return STATE_UNKNOWN;
+                }
+        }
+
+        /* execute query */
+        status = do_query (conn, &query_val);
+        if (status != STATE_OK)
+                /* do_query prints an error message in this case */
+                return status;
+
+        status = get_status (query_val, query_thresholds);
+
+        if (verbose)
+                printf("Closing connection\n");
+        dbi_conn_close (conn);
+
+        printf ("%s - connection time: %fs, '%s' returned %f",
+                        state_text (status), elapsed_time, np_dbi_query, query_val);
+        printf (" | conntime=%fs;;;0 query=%f;%s;%s;0\n", elapsed_time, query_val,
+                        warning_range ? warning_range : "", critical_range ? critical_range : "");
+        return status;
+}
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+        int c;
+
+        int option = 0;
+        static struct option longopts[] = {
+                STD_LONG_OPTS,
+
+                {"driver", required_argument, 0, 'd'},
+                {"option", required_argument, 0, 'o'},
+                {"query", required_argument, 0, 'q'},
+                {"database", required_argument, 0, 'D'},
+                {0, 0, 0, 0}
+        };
+
+        while (1) {
+                c = getopt_long (argc, argv, "Vvht:c:w:H:d:o:q:D:",
+                                longopts, &option);
+
+                if (c == EOF)
+                        break;
+
+                switch (c) {
+                case '?':     /* usage */
+                        usage5 ();
+                case 'h':     /* help */
+                        print_help ();
+                        exit (STATE_OK);
+                case 'V':     /* version */
+                        print_revision (progname, NP_VERSION);
+                        exit (STATE_OK);
+
+                case 'c':     /* critical range */
+                        critical_range = optarg;
+                        break;
+                case 'w':     /* warning range */
+                        warning_range = optarg;
+                        break;
+                case 't':     /* timeout */
+                        if (!is_intnonneg (optarg))
+                                usage2 (_("Timeout interval must be a positive integer"), optarg);
+                        else
+                                timeout_interval = atoi (optarg);
+
+                case 'H':     /* host */
+                        if (!is_host (optarg))
+                                usage2 (_("Invalid hostname/address"), optarg);
+                        else
+                                host = optarg;
+                        break;
+                case 'v':
+                        verbose++;
+                        break;
+
+                case 'd':
+                        np_dbi_driver = optarg;
+                        break;
+                case 'o':
+                        {
+                                driver_option_t *new;
+
+                                char *k, *v;
+
+                                k = optarg;
+                                v = strchr (k, (int)'=');
+
+                                if (! v)
+                                        usage2 (_("Option must be '<key>=<value>'"), optarg);
+
+                                *v = '\0';
+                                ++v;
+
+                                new = realloc (np_dbi_options,
+                                                (np_dbi_options_num + 1) * sizeof (*new));
+                                if (! new) {
+                                        printf ("UNKOWN - failed to reallocate memory\n");
+                                        exit (STATE_UNKNOWN);
+                                }
+
+                                np_dbi_options = new;
+                                new = np_dbi_options + np_dbi_options_num;
+                                ++np_dbi_options_num;
+
+                                new->key = k;
+                                new->value = v;
+                        }
+                        break;
+                case 'q':
+                        np_dbi_query = optarg;
+                        break;
+                case 'D':
+                        np_dbi_database = optarg;
+                        break;
+                }
+        }
+
+        set_thresholds (&query_thresholds, warning_range, critical_range);
+
+        return validate_arguments ();
+}
+
+int
+validate_arguments ()
+{
+        if (! np_dbi_driver)
+                usage ("Must specify a DBI driver");
+
+        if (! np_dbi_query)
+                usage ("Must specify an SQL query to execute");
+
+        return OK;
+}
+
+void
+print_help (void)
+{
+        print_revision (progname, NP_VERSION);
+
+        printf (COPYRIGHT, copyright, email);
+
+        printf (_("This program checks a query result against threshold levels"));
+
+        printf ("\n\n");
+
+        print_usage ();
+
+        printf (UT_HELP_VRSN);
+        printf ("\n");
+
+        printf (" %s\n", "-d, --driver=STRING");
+        printf ("    %s\n", _("DBI driver to use"));
+        printf (" %s\n", "-o, --option=STRING");
+        printf ("    %s\n", _("DBI driver options"));
+        printf (" %s\n", "-q, --query=STRING");
+        printf ("    %s\n", _("SQL query to execute"));
+        printf ("\n");
+
+        printf (UT_WARN_CRIT_RANGE);
+
+        printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+
+        printf (UT_VERBOSE);
+
+        printf ("\n");
+        printf (" %s\n", _("A DBI driver (-d option) and a query (-q option) are required."));
+        printf (" %s\n", _("This plugin connects to an SQL database using libdbi and executes the"));
+        printf (" %s\n", _("specified SQL query. The first column of the first row of the result"));
+        printf (" %s\n", _("will be used as the check result and, if specified, compared with the"));
+        printf (" %s\n", _("warning and critical ranges. The result from the query has to be numeric"));
+        printf (" %s\n\n", _("(strings representing numbers are fine)."));
+
+        printf (" %s\n", _("The number and type of required DBI driver options depends on the actual"));
+        printf (" %s\n", _("driver. See its documentation at http://libdbi-drivers.sourceforge.net/"));
+        printf (" %s\n", _("for details."));
+
+        printf (UT_SUPPORT);
+}
+
+void
+print_usage (void)
+{
+        printf ("%s\n", _("Usage:"));
+        printf ("%s -d <DBI driver> [-o <DBI driver option> [...]] -q <SQL query>\n", progname);
+        printf (" [-H <host>] [-c <critical value>] [-w <warning value>]\n");
+}
+
+double
+get_field (dbi_conn conn, dbi_result res, unsigned short *field_type)
+{
+        double val = 0.0;
+
+        if (*field_type == DBI_TYPE_INTEGER) {
+                val = (double)dbi_result_get_longlong_idx (res, 1);
+        }
+        else if (*field_type == DBI_TYPE_DECIMAL) {
+                val = dbi_result_get_double_idx (res, 1);
+        }
+        else if (*field_type == DBI_TYPE_STRING) {
+                const char *val_str;
+                char *endptr = NULL;
+
+                val_str = dbi_result_get_string_idx (res, 1);
+                if ((! val_str) || (strcmp (val_str, "ERROR") == 0)) {
+                        np_dbi_print_error (conn, "CRITICAL - failed to fetch string value");
+                        *field_type = DBI_TYPE_ERROR;
+                        return 0.0;
+                }
+
+                if (verbose > 2)
+                        printf ("Query returned string '%s'\n", val_str);
+
+                val = strtod (val_str, &endptr);
+                if (endptr == val_str) {
+                        printf ("CRITICAL - result value is not a numeric: %s\n", val_str);
+                        *field_type = DBI_TYPE_ERROR;
+                        return 0.0;
+                }
+                else if ((endptr != NULL) && (*endptr != '\0')) {
+                        if (verbose)
+                                printf ("Garbage after value: %s\n", endptr);
+                }
+        }
+        else {
+                printf ("CRITICAL - cannot parse value of type %s (%i)\n",
+                                (*field_type == DBI_TYPE_BINARY)
+                                        ? "BINARY"
+                                        : (*field_type == DBI_TYPE_DATETIME)
+                                                ? "DATETIME"
+                                                : "<unknown>",
+                                *field_type);
+                *field_type = DBI_TYPE_ERROR;
+                return 0.0;
+        }
+        return val;
+}
+
+int
+do_query (dbi_conn conn, double *res_val)
+{
+        dbi_result res;
+
+        unsigned short field_type;
+        double val = 0.0;
+
+        if (verbose)
+                printf ("Executing query '%s'\n", np_dbi_query);
+
+        res = dbi_conn_query (conn, np_dbi_query);
+        if (! res) {
+                np_dbi_print_error (conn, "CRITICAL - failed to execute query '%s'", np_dbi_query);
+                return STATE_CRITICAL;
+        }
+
+        if (dbi_result_get_numrows (res) == DBI_ROW_ERROR) {
+                np_dbi_print_error (conn, "CRITICAL - failed to fetch rows");
+                return STATE_CRITICAL;
+        }
+
+        if (dbi_result_get_numrows (res) < 1) {
+                printf ("WARNING - no rows returned\n");
+                return STATE_WARNING;
+        }
+
+        if (dbi_result_get_numfields (res) == DBI_FIELD_ERROR) {
+                np_dbi_print_error (conn, "CRITICAL - failed to fetch fields");
+                return STATE_CRITICAL;
+        }
+
+        if (dbi_result_get_numfields (res) < 1) {
+                printf ("WARNING - no fields returned\n");
+                return STATE_WARNING;
+        }
+
+        if (dbi_result_first_row (res) != 1) {
+                np_dbi_print_error (conn, "CRITICAL - failed to fetch first row");
+                return STATE_CRITICAL;
+        }
+
+        field_type = dbi_result_get_field_type_idx (res, 1);
+        if (field_type != DBI_TYPE_ERROR)
+                val = get_field (conn, res, &field_type);
+
+        if (field_type == DBI_TYPE_ERROR) {
+                np_dbi_print_error (conn, "CRITICAL - failed to fetch data");
+                return STATE_CRITICAL;
+        }
+
+        *res_val = val;
+
+        dbi_result_free (res);
+        return STATE_OK;
+}
+
+void
+np_dbi_print_error (dbi_conn conn, char *fmt, ...)
+{
+        const char *errmsg = NULL;
+        va_list ap;
+
+        va_start (ap, fmt);
+
+        dbi_conn_error (conn, &errmsg);
+        vprintf (fmt, ap);
+        printf (": %s\n", errmsg);
+
+        va_end (ap);
+}
+