Imported Upstream version 1.4.5
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315
plugins/check_nagios.c
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315
plugins/check_nagios.c
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/******************************************************************************
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*
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* Nagios check_nagios plugin
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*
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* License: GPL
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* Copyright (c) 1999-2006 nagios-plugins team
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*
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* Last Modified: $Date: 2006/10/19 00:25:16 $
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*
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* Description:
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*
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* This file contains the check_nagios plugin
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*
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* This plugin checks the status of the Nagios process on the local machine
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* The plugin will check to make sure the Nagios status log is no older than
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* the number of minutes specified by the expires option.
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* It also checks the process table for a process matching the command argument.
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*
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*
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* License Information:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: check_nagios.c,v 1.31 2006/10/19 00:25:16 opensides Exp $
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******************************************************************************/
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const char *progname = "check_nagios";
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const char *revision = "$Revision: 1.31 $";
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const char *copyright = "1999-2006";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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#include "common.h"
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#include "runcmd.h"
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#include "utils.h"
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int process_arguments (int, char **);
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void print_help (void);
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void print_usage (void);
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char *status_log = NULL;
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char *process_string = NULL;
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int expire_minutes = 0;
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int verbose = 0;
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int
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main (int argc, char **argv)
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{
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int result = STATE_UNKNOWN;
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char input_buffer[MAX_INPUT_BUFFER];
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unsigned long latest_entry_time = 0L;
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unsigned long temp_entry_time = 0L;
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int proc_entries = 0;
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time_t current_time;
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char *temp_ptr;
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FILE *fp;
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int procuid = 0;
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int procpid = 0;
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int procppid = 0;
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int procvsz = 0;
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int procrss = 0;
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float procpcpu = 0;
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char procstat[8];
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#ifdef PS_USES_PROCETIME
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char procetime[MAX_INPUT_BUFFER];
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#endif /* PS_USES_PROCETIME */
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char procprog[MAX_INPUT_BUFFER];
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char *procargs;
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int pos, cols;
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int expected_cols = PS_COLS - 1;
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const char *zombie = "Z";
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char *temp_string;
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output chld_out, chld_err;
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size_t i;
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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if (process_arguments (argc, argv) == ERROR)
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usage_va(_("Could not parse arguments"));
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/* Set signal handling and alarm timeout */
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if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR) {
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usage_va(_("Cannot catch SIGALRM"));
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}
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/* handle timeouts gracefully... */
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alarm (timeout_interval);
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/* open the status log */
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fp = fopen (status_log, "r");
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if (fp == NULL) {
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die (STATE_CRITICAL, "NAGIOS %s: %s\n", _("CRITICAL"), _("Cannot open status log for reading!"));
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}
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/* get the date/time of the last item updated in the log */
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while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
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if ((temp_ptr = strstr (input_buffer, "created=")) != NULL) {
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temp_entry_time = strtoul (temp_ptr + 8, NULL, 10);
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latest_entry_time = temp_entry_time;
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break;
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} else if ((temp_ptr = strtok (input_buffer, "]")) != NULL) {
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temp_entry_time = strtoul (temp_ptr + 1, NULL, 10);
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if (temp_entry_time > latest_entry_time)
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latest_entry_time = temp_entry_time;
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}
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}
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fclose (fp);
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if (verbose >= 2)
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printf("command: %s\n", PS_COMMAND);
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/* run the command to check for the Nagios process.. */
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if((result = np_runcmd(PS_COMMAND, &chld_out, &chld_err, 0)) != 0)
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result = STATE_WARNING;
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/* count the number of matching Nagios processes... */
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for(i = 0; i < chld_out.lines; i++) {
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cols = sscanf (chld_out.line[i], PS_FORMAT, PS_VARLIST);
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/* Zombie processes do not give a procprog command */
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if ( cols == (expected_cols - 1) && strstr(procstat, zombie) ) {
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cols = expected_cols;
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/* Set some value for procargs for the strip command further below
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* Seen to be a problem on some Solaris 7 and 8 systems */
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chld_out.line[i][pos] = '\n';
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chld_out.line[i][pos+1] = 0x0;
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}
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if ( cols >= expected_cols ) {
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asprintf (&procargs, "%s", chld_out.line[i] + pos);
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strip (procargs);
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/* Some ps return full pathname for command. This removes path */
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temp_string = strtok ((char *)procprog, "/");
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while (temp_string) {
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strcpy(procprog, temp_string);
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temp_string = strtok (NULL, "/");
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}
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/* May get empty procargs */
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if (!strstr(procargs, argv[0]) && strstr(procargs, process_string) && strcmp(procargs,"")) {
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proc_entries++;
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if (verbose >= 2) {
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printf (_("Found process: %s %s\n"), procprog, procargs);
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}
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}
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}
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}
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/* If we get anything on stderr, at least set warning */
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if(chld_err.buflen)
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result = max_state (result, STATE_WARNING);
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/* reset the alarm handler */
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alarm (0);
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if (proc_entries == 0) {
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die (STATE_CRITICAL, "NAGIOS %s: %s\n", _("CRITICAL"), _("Could not locate a running Nagios process!"));
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}
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if (latest_entry_time == 0L) {
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die (STATE_CRITICAL, "NAGIOS %s: %s\n", _("CRITICAL"), _("Cannot parse Nagios log file for valid time"));
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}
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time (¤t_time);
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if ((int)(current_time - latest_entry_time) > (expire_minutes * 60)) {
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result = STATE_WARNING;
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} else {
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result = STATE_OK;
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}
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printf ("NAGIOS %s: ", (result == STATE_OK) ? _("OK") : _("WARNING"));
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printf (ngettext ("%d process", "%d processes", proc_entries), proc_entries);
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printf (", ");
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printf (
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ngettext ("status log updated %d second ago",
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"status log updated %d seconds ago",
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(int) (current_time - latest_entry_time) ),
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(int) (current_time - latest_entry_time) );
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printf ("\n");
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return result;
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}
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/* process command-line arguments */
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int
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process_arguments (int argc, char **argv)
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{
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int c;
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int option = 0;
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static struct option longopts[] = {
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{"filename", required_argument, 0, 'F'},
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{"expires", required_argument, 0, 'e'},
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{"command", required_argument, 0, 'C'},
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{"version", no_argument, 0, 'V'},
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{"help", no_argument, 0, 'h'},
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{"verbose", no_argument, 0, 'v'},
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{0, 0, 0, 0}
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};
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if (argc < 2)
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return ERROR;
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if (!is_option (argv[1])) {
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status_log = argv[1];
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if (is_intnonneg (argv[2]))
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expire_minutes = atoi (argv[2]);
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else
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die (STATE_UNKNOWN,
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_("Expiration time must be an integer (seconds)\n"));
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process_string = argv[3];
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return OK;
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}
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while (1) {
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c = getopt_long (argc, argv, "+hVvF:C:e:", longopts, &option);
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if (c == -1 || c == EOF || c == 1)
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break;
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switch (c) {
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case 'h': /* help */
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print_help ();
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exit (STATE_OK);
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case 'V': /* version */
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print_revision (progname, revision);
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exit (STATE_OK);
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case 'F': /* status log */
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status_log = optarg;
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break;
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case 'C': /* command */
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process_string = optarg;
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break;
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case 'e': /* expiry time */
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if (is_intnonneg (optarg))
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expire_minutes = atoi (optarg);
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else
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die (STATE_UNKNOWN,
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_("Expiration time must be an integer (seconds)\n"));
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break;
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case 'v':
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verbose++;
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break;
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default: /* print short usage_va statement if args not parsable */
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usage_va(_("Unknown argument - %s"), optarg);
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}
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}
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if (status_log == NULL)
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die (STATE_UNKNOWN, _("You must provide the status_log\n"));
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if (process_string == NULL)
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die (STATE_UNKNOWN, _("You must provide a process string\n"));
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return OK;
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}
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void
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print_help (void)
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{
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print_revision (progname, revision);
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printf (_(COPYRIGHT), copyright, email);
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printf ("%s\n", _("This plugin checks the status of the Nagios process on the local machine"));
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printf ("%s\n", _("The plugin will check to make sure the Nagios status log is no older than"));
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printf ("%s\n", _("the number of minutes specified by the expires option."));
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printf ("%s\n", _("It also checks the process table for a process matching the command argument."));
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printf ("\n\n");
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print_usage ();
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printf (_(UT_HELP_VRSN));
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printf (" %s\n", "-F, --filename=FILE");
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printf (" %s\n", _("Name of the log file to check"));
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printf (" %s\n", "-e, --expires=INTEGER");
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printf (" %s\n", _("Minutes aging after which logfile is considered stale"));
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printf (" %s\n", "-C, --command=STRING");
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printf (" %s\n", _("Substring to search for in process arguments"));
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printf (_(UT_VERBOSE));
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printf ("\n");
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printf ("%s\n", _("Examples:"));
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printf (" %s\n", "check_nagios -e 5 -F /usr/local/nagios/var/status.log -C /usr/local/nagios/bin/nagios");
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printf (_(UT_SUPPORT));
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}
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void
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print_usage (void)
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{
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printf (_("Usage:"));
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printf ("%s -F <status log file> -e <expire_minutes> -C <process_string>\n", progname);
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}
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