Initial revision

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@2 f882894a-f735-0410-b71e-b25c423dba1c

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diff --git a/plugins/check_mrtg.c b/plugins/check_mrtg.c
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+/******************************************************************************
+ *
+ * Program: MRTG (Multi-Router Traffic Grapher) generic plugin for Nagios
+ * License: GPL
+ *
+ * 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.
+ *
+ * $Id$
+ *
+ *****************************************************************************/
+
+#define PROGNAME "check_mrtg"
+#define REVISION "$Revision$"
+#define COPYRIGHT "Copyright (c) 1999-2001 Ethan Galstad"
+
+#define SUMMARY "\
+This plugin will check either the average or maximum value of one of the\n\
+two variables recorded in an MRTG log file.\n"
+
+/* old command line: 
+         <log_file> <expire_minutes> <AVG|MAX> <variable> <vwl> <vcl> <label> [units] */
+#define OPTIONS "\
+-F log_file -a <AVG | MAX> -v variable -w warning -c critical\n\
+            [-l label] [-u units] [-e expire_minutes] [-t timeout] [-v]"
+
+#define LONGOPTIONS "\
+ -F, --logfile=FILE\n\
+   The MRTG log file containing the data you want to monitor\n\
+ -e, --expires=MINUTES\n\
+   Minutes before MRTG data is considered to be too old\n\
+ -a, --aggregation=AVG|MAX\n\
+   Should we check average or maximum values?\n\
+ -v, --variable=INTEGER\n\
+   Which variable set should we inspect? 1 or 2?\n\
+ -w, --warning=INTEGER\n\
+   Threshold value for data to result in WARNING status\n\
+ -c, --critical=INTEGER\n\
+   Threshold value for data to result in CRITICAL status\n\
+ -l, --label=STRING\n\
+   Type label for data (Examples: Conns, \"Processor Load\", In, Out)\n\
+ -u, --units=STRING\n\
+   Option units label for data (Example: Packets/Sec, Errors/Sec, \n\
+   \"Bytes Per Second\", \"%% Utilization\")\n\
+ -h, --help\n\
+   Print detailed help screen\n\
+ -V, --version\n\
+   Print version information\n"
+
+#define DESCRIPTION "\
+If the value exceeds the <vwl> threshold, a WARNING status is returned.  If\n\
+the value exceeds the <vcl> threshold, a CRITICAL status is returned.  If\n\
+the data in the log file is older than <expire_minutes> old, a WARNING\n\
+status is returned and a warning message is printed.\n\
+\n\
+This plugin is useful for monitoring MRTG data that does not correspond to\n\
+bandwidth usage.  (Use the check_mrtgtraf plugin for monitoring bandwidth).\n\
+It can be used to monitor any kind of data that MRTG is monitoring - errors,\n\
+packets/sec, etc.  I use MRTG in conjuction with the Novell NLM that allows\n\
+me to track processor utilization, user connections, drive space, etc and\n\
+this plugin works well for monitoring that kind of data as well.\n\
+\n\
+Notes:\n\
+- This plugin only monitors one of the two variables stored in the MRTG log\n\
+  file.  If you want to monitor both values you will have to define two\n\
+  commands with different values for the <variable> argument.  Of course,\n\
+  you can always hack the code to make this plugin work for you...\n\
+- MRTG stands for the Multi Router Traffic Grapher.  It can be downloaded from\n\
+  http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html\n"
+
+#include "config.h"
+#include "common.h"
+#include "utils.h"
+
+int process_arguments (int, char **);
+int call_getopt (int, char **);
+int validate_arguments (void);
+void print_help (void);
+void print_usage (void);
+
+char *log_file = NULL;
+int expire_minutes = 0;
+int use_average = TRUE;
+int variable_number = -1;
+unsigned long value_warning_threshold = 0L;
+unsigned long value_critical_threshold = 0L;
+char *value_label = NULL;
+char *units_label = NULL;
+
+int
+main (int argc, char **argv)
+{
+        int result = STATE_OK;
+        FILE *fp;
+        int line;
+        char input_buffer[MAX_INPUT_BUFFER];
+        char *temp_buffer;
+        time_t current_time;
+        char error_message[MAX_INPUT_BUFFER];
+        time_t timestamp = 0L;
+        unsigned long average_value_rate = 0L;
+        unsigned long maximum_value_rate = 0L;
+        unsigned long value_rate = 0L;
+
+        if (process_arguments (argc, argv) != OK)
+                usage ("Invalid command arguments supplied\n");
+
+        /* open the MRTG log file for reading */
+        fp = fopen (log_file, "r");
+        if (fp == NULL) {
+                printf ("Unable to open MRTG log file\n");
+                return STATE_UNKNOWN;
+        }
+
+        line = 0;
+        while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
+
+                line++;
+
+                /* skip the first line of the log file */
+                if (line == 1)
+                        continue;
+
+                /* break out of read loop if we've passed the number of entries we want to read */
+                if (line > 2)
+                        break;
+
+                /* grab the timestamp */
+                temp_buffer = strtok (input_buffer, " ");
+                timestamp = strtoul (temp_buffer, NULL, 10);
+
+                /* grab the average value 1 rate */
+                temp_buffer = strtok (NULL, " ");
+                if (variable_number == 1)
+                        average_value_rate = strtoul (temp_buffer, NULL, 10);
+
+                /* grab the average value 2 rate */
+                temp_buffer = strtok (NULL, " ");
+                if (variable_number == 2)
+                        average_value_rate = strtoul (temp_buffer, NULL, 10);
+
+                /* grab the maximum value 1 rate */
+                temp_buffer = strtok (NULL, " ");
+                if (variable_number == 1)
+                        maximum_value_rate = strtoul (temp_buffer, NULL, 10);
+
+                /* grab the maximum value 2 rate */
+                temp_buffer = strtok (NULL, " ");
+                if (variable_number == 2)
+                        maximum_value_rate = strtoul (temp_buffer, NULL, 10);
+        }
+
+        /* close the log file */
+        fclose (fp);
+
+        /* if we couldn't read enough data, return an unknown error */
+        if (line <= 2) {
+                result = STATE_UNKNOWN;
+                sprintf (error_message, "Unable to process MRTG log file\n");
+        }
+
+        /* make sure the MRTG data isn't too old */
+        if (result == STATE_OK) {
+                time (&current_time);
+                if (expire_minutes > 0
+                                && (current_time - timestamp) > (expire_minutes * 60)) {
+                        result = STATE_WARNING;
+                        sprintf (error_message, "MRTG data has expired (%d minutes old)\n",
+                                                         (int) ((current_time - timestamp) / 60));
+                }
+        }
+
+        /* else check the incoming/outgoing rates */
+        if (result == STATE_OK) {
+
+                if (use_average == TRUE)
+                        value_rate = average_value_rate;
+                else
+                        value_rate = maximum_value_rate;
+
+                if (value_rate > value_critical_threshold)
+                        result = STATE_CRITICAL;
+                else if (value_rate > value_warning_threshold)
+                        result = STATE_WARNING;
+        }
+
+        sprintf (error_message, "%s. %s = %lu %s",
+                                         (use_average == TRUE) ? "Ave" : "Max", value_label, value_rate,
+                                         units_label);
+        printf ("%s\n", error_message);
+
+        return result;
+}
+
+
+
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+        int c;
+
+        if (argc < 2)
+                return ERROR;
+
+        for (c = 1; c < argc; c++) {
+                if (strcmp ("-to", argv[c]) == 0)
+                        strcpy (argv[c], "-t");
+                else if (strcmp ("-wt", argv[c]) == 0)
+                        strcpy (argv[c], "-w");
+                else if (strcmp ("-ct", argv[c]) == 0)
+                        strcpy (argv[c], "-c");
+        }
+
+
+
+        c = 0;
+        while ((c += (call_getopt (argc - c, &argv[c]))) < argc) {
+
+                if (is_option (argv[c]))
+                        continue;
+
+                if (log_file == NULL) {
+                        log_file = argv[c];
+                }
+                else if (expire_minutes <= 0) {
+                        if (is_intpos (argv[c]))
+                                expire_minutes = atoi (argv[c]);
+                        else
+                                terminate (STATE_UNKNOWN,
+                                                                         "%s is not a valid expiration time\nUse '%s -h' for additional help\n",
+                                                                         argv[c], PROGNAME);
+                }
+                else if (strcmp (argv[c], "MAX") == 0) {
+                        use_average = FALSE;
+                }
+                else if (strcmp (argv[c], "AVG") == 0) {
+                        use_average = TRUE;
+                }
+                else if (variable_number == -1) {
+                        variable_number = atoi (argv[c]);
+                        if (variable_number < 1 || variable_number > 2) {
+                                printf ("%s :", argv[c]);
+                                usage ("Invalid variable number\n");
+                        }
+                }
+                else if (value_warning_threshold == 0) {
+                        value_warning_threshold = strtoul (argv[c], NULL, 10);
+                }
+                else if (value_critical_threshold == 0) {
+                        value_critical_threshold = strtoul (argv[c], NULL, 10);
+                }
+                else if (value_label == NULL) {
+                        value_label = argv[c];
+                }
+                else if (units_label == NULL) {
+                        units_label = argv[c];
+                }
+        }
+
+        if (value_label == NULL)
+                value_label = strscpy (NULL, "");
+
+        if (units_label == NULL)
+                units_label = strscpy (NULL, "");
+
+        return validate_arguments ();
+}
+
+
+
+
+
+
+int
+call_getopt (int argc, char **argv)
+{
+        int c, i = 0;
+
+#ifdef HAVE_GETOPT_H
+        int option_index = 0;
+        static struct option long_options[] = {
+                {"logfile", required_argument, 0, 'F'},
+                {"expires", required_argument, 0, 'e'},
+                {"aggregation", required_argument, 0, 'a'},
+                {"variable", required_argument, 0, 'v'},
+                {"critical", required_argument, 0, 'c'},
+                {"warning", required_argument, 0, 'w'},
+                {"label", required_argument, 0, 'l'},
+                {"units", required_argument, 0, 'u'},
+                {"verbose", no_argument, 0, 'v'},
+                {"version", no_argument, 0, 'V'},
+                {"help", no_argument, 0, 'h'},
+                {0, 0, 0, 0}
+        };
+#endif
+
+        while (1) {
+#ifdef HAVE_GETOPT_H
+                c =
+                        getopt_long (argc, argv, "+hVF:e:a:v:c:w:l:u:", long_options,
+                                                                         &option_index);
+#else
+                c = getopt (argc, argv, "+?hVF:e:a:v:c:w:l:u:");
+#endif
+
+                i++;
+
+                if (c == -1 || c == EOF || c == 1)
+                        break;
+
+                switch (c) {
+                case 'F':
+                case 'e':
+                case 'a':
+                case 'v':
+                case 'c':
+                case 'w':
+                case 'l':
+                case 'u':
+                        i++;
+                }
+
+                switch (c) {
+                case 'F':                                                                       /* input file */
+                        log_file = optarg;
+                        break;
+                case 'e':                                                                       /* ups name */
+                        expire_minutes = atoi (optarg);
+                        break;
+                case 'a':                                                                       /* port */
+                        if (!strcmp (optarg, "MAX"))
+                                use_average = FALSE;
+                        else
+                                use_average = TRUE;
+                        break;
+                case 'v':
+                        variable_number = atoi (optarg);
+                        if (variable_number < 1 || variable_number > 2)
+                                usage ("Invalid variable number\n");
+                        break;
+                case 'w':                                                                       /* critical time threshold */
+                        value_warning_threshold = strtoul (optarg, NULL, 10);
+                        break;
+                case 'c':                                                                       /* warning time threshold */
+                        value_critical_threshold = strtoul (optarg, NULL, 10);
+                        break;
+                case 'l':                                                                       /* label */
+                        value_label = optarg;
+                        break;
+                case 'u':                                                                       /* timeout */
+                        units_label = optarg;
+                        break;
+                case 'V':                                                                       /* version */
+                        print_revision (PROGNAME, "$Revision$");
+                        exit (STATE_OK);
+                case 'h':                                                                       /* help */
+                        print_help ();
+                        exit (STATE_OK);
+                case '?':                                                                       /* help */
+                        usage ("Invalid argument\n");
+                }
+        }
+        return i;
+}
+
+int
+validate_arguments (void)
+{
+        if (variable_number == -1)
+                usage ("You must supply the variable number\n");
+
+        return OK;
+}
+
+void
+print_help (void)
+{
+        print_revision (PROGNAME, REVISION);
+        printf ("%s\n\n%s\n", COPYRIGHT, SUMMARY);
+        print_usage ();
+        printf ("\nOptions:\n" LONGOPTIONS "\n" DESCRIPTION "\n");
+        support ();
+}
+
+void
+print_usage (void)
+{
+        printf ("Usage:\n" " %s %s\n"
+#ifdef HAVE_GETOPT_H
+                                        " %s (-h | --help) for detailed help\n"
+                                        " %s (-V | --version) for version information\n",
+#else
+                                        " %s -h for detailed help\n"
+                                        " %s -V for version information\n",
+#endif
+                                        PROGNAME, OPTIONS, PROGNAME, PROGNAME);
+}