From 44a321cb8a42d6c0ea2d96a1086a17f2134c89cc Mon Sep 17 00:00:00 2001
From: Ethan Galstad <egalstad@users.sourceforge.net>
Date: Thu, 28 Feb 2002 06:42:51 +0000
Subject: Initial revision

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@2 f882894a-f735-0410-b71e-b25c423dba1c
---
 plugins/check_mrtg.c | 413 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 413 insertions(+)
 create mode 100644 plugins/check_mrtg.c

(limited to 'plugins/check_mrtg.c')

diff --git a/plugins/check_mrtg.c b/plugins/check_mrtg.c
new file mode 100644
index 00000000..b86686d7
--- /dev/null
+++ b/plugins/check_mrtg.c
@@ -0,0 +1,413 @@
+/******************************************************************************
+ *
+ * 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);
+}
-- 
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