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pkg-monitoring-plugins/plugins/check_mrtg.c

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/******************************************************************************
*
* Nagios check_mrtg plugin
*
* License: GPL
* Copyright (c) 1999-2006 nagios-plugins team
*
* Last Modified: $Date: 2007-02-06 21:03:21 +0000 (Tue, 06 Feb 2007) $
*
* Description:
*
* This file contains the check_mrtg plugin
*
* This plugin will check either the average or maximum value of one of the
* two variables recorded in an MRTG log file.
*
*
* 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: check_mrtg.c 1611 2007-02-06 21:03:21Z opensides $
******************************************************************************/
const char *progname = "check_mrtg";
const char *revision = "$Revision: 1611 $";
const char *copyright = "1999-2006";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "utils.h"
int process_arguments (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 *label;
char *units;
int
main (int argc, char **argv)
{
int result = STATE_UNKNOWN;
FILE *fp;
int line;
char input_buffer[MAX_INPUT_BUFFER];
char *temp_buffer;
time_t current_time;
time_t timestamp = 0L;
unsigned long average_value_rate = 0L;
unsigned long maximum_value_rate = 0L;
unsigned long rate = 0L;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments\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) {
printf (_("Unable to process MRTG log file\n"));
return STATE_UNKNOWN;
}
/* make sure the MRTG data isn't too old */
time (&current_time);
if (expire_minutes > 0
&& (current_time - timestamp) > (expire_minutes * 60)) {
printf (_("MRTG data has expired (%d minutes old)\n"),
(int) ((current_time - timestamp) / 60));
return STATE_WARNING;
}
/* else check the incoming/outgoing rates */
if (use_average == TRUE)
rate = average_value_rate;
else
rate = maximum_value_rate;
if (rate > value_critical_threshold)
result = STATE_CRITICAL;
else if (rate > value_warning_threshold)
result = STATE_WARNING;
printf("%s. %s = %lu %s|%s\n",
(use_average == TRUE) ? _("Avg") : _("Max"),
label, rate, units,
perfdata(label, (long) rate, units,
(int) value_warning_threshold, (long) value_warning_threshold,
(int) value_critical_threshold, (long) value_critical_threshold,
0, 0, 0, 0));
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
int option = 0;
static struct option longopts[] = {
{"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}
};
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");
}
while (1) {
c = getopt_long (argc, argv, "hVF:e:a:v:c:w:l:u:", longopts,
&option);
if (c == -1 || c == EOF)
break;
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)
usage4 (_("Invalid variable number"));
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 */
label = optarg;
break;
case 'u': /* timeout */
units = optarg;
break;
case 'V': /* version */
print_revision (progname, revision);
exit (STATE_OK);
case 'h': /* help */
print_help ();
exit (STATE_OK);
case '?': /* help */
usage5 ();
}
}
c = optind;
if (log_file == NULL && argc > c) {
log_file = argv[c++];
}
if (expire_minutes <= 0 && argc > c) {
if (is_intpos (argv[c]))
expire_minutes = atoi (argv[c++]);
else
die (STATE_UNKNOWN,
_("%s is not a valid expiration time\nUse '%s -h' for additional help\n"),
argv[c], progname);
}
if (argc > c && strcmp (argv[c], "MAX") == 0) {
use_average = FALSE;
c++;
}
else if (argc > c && strcmp (argv[c], "AVG") == 0) {
use_average = TRUE;
c++;
}
if (argc > c && variable_number == -1) {
variable_number = atoi (argv[c++]);
if (variable_number < 1 || variable_number > 2) {
printf ("%s :", argv[c]);
usage (_("Invalid variable number\n"));
}
}
if (argc > c && value_warning_threshold == 0) {
value_warning_threshold = strtoul (argv[c++], NULL, 10);
}
if (argc > c && value_critical_threshold == 0) {
value_critical_threshold = strtoul (argv[c++], NULL, 10);
}
if (argc > c && strlen (label) == 0) {
label = argv[c++];
}
if (argc > c && strlen (units) == 0) {
units = argv[c++];
}
return validate_arguments ();
}
int
validate_arguments (void)
{
if (variable_number == -1)
usage4 (_("You must supply the variable number"));
if (label == NULL)
label = strdup ("value");
if (units == NULL)
units = strdup ("");
return OK;
}
void
print_help (void)
{
print_revision (progname, revision);
printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
printf (COPYRIGHT, copyright, email);
printf ("%s\n", _("This plugin will check either the average or maximum value of one of the"));
printf ("%s\n", _("two variables recorded in an MRTG log file."));
printf ("\n\n");
print_usage ();
printf (_(UT_HELP_VRSN));
printf (" %s\n", "-F, --logfile=FILE");
printf (" %s\n", _("The MRTG log file containing the data you want to monitor"));
printf ("-e, --expires=MINUTES");
printf (" %s\n", _("Minutes before MRTG data is considered to be too old"));
printf (" %s\n", "-a, --aggregation=AVG|MAX");
printf (" %s\n", _("Should we check average or maximum values?"));
printf (" %s\n", "-v, --variable=INTEGER");
printf (" %s\n", _("Which variable set should we inspect? (1 or 2)"));
printf (" %s\n", "-w, --warning=INTEGER");
printf (" %s\n", _("Threshold value for data to result in WARNING status"));
printf (" %s\n", "-c, --critical=INTEGER");
printf (" %s\n", _("Threshold value for data to result in CRITICAL status"));
printf (" %s\n", "-l, --label=STRING");
printf (" %s\n", _("Type label for data (Examples: Conns, \"Processor Load\", In, Out)"));
printf (" %s\n", "-u, --units=STRING");
printf (" %s\n", _("Option units label for data (Example: Packets/Sec, Errors/Sec,"));
printf (" %s\n", _("\"Bytes Per Second\", \"%% Utilization\")"));
printf ("%s\n", _("If the value exceeds the <vwl> threshold, a WARNING status is returned. If"));
printf ("%s\n", _("the value exceeds the <vcl> threshold, a CRITICAL status is returned. If"));
printf ("%s\n", _("the data in the log file is older than <expire_minutes> old, a WARNING"));
printf ("%s\n", _("status is returned and a warning message is printed."));
printf ("%s\n", _("This plugin is useful for monitoring MRTG data that does not correspond to"));
printf ("%s\n", _("bandwidth usage. (Use the check_mrtgtraf plugin for monitoring bandwidth)."));
printf ("%s\n", _("It can be used to monitor any kind of data that MRTG is monitoring - errors,"));
printf ("%s\n", _("packets/sec, etc. I use MRTG in conjuction with the Novell NLM that allows"));
printf ("%s\n", _("me to track processor utilization, user connections, drive space, etc and"));
printf ("%s\n\n", _("this plugin works well for monitoring that kind of data as well."));
printf ("%s\n", _("Notes:"));
printf (" %s\n", _("- This plugin only monitors one of the two variables stored in the MRTG log"));
printf (" %s\n", _(" file. If you want to monitor both values you will have to define two"));
printf (" %s\n", _(" commands with different values for the <variable> argument. Of course,"));
printf (" %s\n", _("you can always hack the code to make this plugin work for you..."));
printf (" %s\n", _("- MRTG stands for the Multi Router Traffic Grapher. It can be downloaded from"));
printf (" %s\n", "http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html");
printf (_(UT_SUPPORT));
}
/* original command line:
<log_file> <expire_minutes> <AVG|MAX> <variable> <vwl> <vcl> <label> [units] */
void
print_usage (void)
{
printf (_("Usage:"));
printf ("%s -F log_file -a <AVG | MAX> -v variable -w warning -c critical\n",progname);
printf ("[-l label] [-u units] [-e expire_minutes] [-t timeout] [-v]\n");
}
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