Imported Upstream version 1.4.5
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plugins/check_load.c
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313
plugins/check_load.c
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/******************************************************************************
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*
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* Nagios check_load 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_load plugin
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*
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* This plugin tests the current system load average.
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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_load.c,v 1.32 2006/10/19 00:25:16 opensides Exp $
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******************************************************************************/
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const char *progname = "check_load";
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const char *revision = "$Revision: 1.32 $";
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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 "utils.h"
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#include "popen.h"
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#ifdef HAVE_SYS_LOADAVG_H
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#include <sys/loadavg.h>
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#endif
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/* needed for compilation under NetBSD, as suggested by Andy Doran */
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#ifndef LOADAVG_1MIN
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#define LOADAVG_1MIN 0
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#define LOADAVG_5MIN 1
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#define LOADAVG_15MIN 2
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#endif /* !defined LOADAVG_1MIN */
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static int process_arguments (int argc, char **argv);
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static int validate_arguments (void);
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void print_help (void);
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void print_usage (void);
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/* strictly for pretty-print usage in loops */
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static const int nums[3] = { 1, 5, 15 };
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/* provide some fairly sane defaults */
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double wload[3] = { 0.0, 0.0, 0.0 };
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double cload[3] = { 0.0, 0.0, 0.0 };
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#define la1 la[0]
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#define la5 la[1]
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#define la15 la[2]
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char *status_line;
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static void
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get_threshold(char *arg, double *th)
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{
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size_t i, n;
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char *str = arg, *p;
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n = strlen(arg);
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for(i = 0; i < 3; i++) {
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th[i] = strtod(str, &p);
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if(p == str) break;
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str = p + 1;
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if(n <= (size_t)(str - arg)) break;
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}
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/* empty argument or non-floatish, so warn about it and die */
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if(!i) usage (_("Warning threshold must be float or float triplet!\n"));
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if(i != 2) {
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/* one or more numbers were given, so fill array with last
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* we got (most likely to NOT produce the least expected result) */
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for(n = i; n < 3; n++) th[n] = th[i];
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}
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}
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int
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main (int argc, char **argv)
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{
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int result;
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int i;
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double la[3] = { 0.0, 0.0, 0.0 }; /* NetBSD complains about unitialized arrays */
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#ifndef HAVE_GETLOADAVG
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char input_buffer[MAX_INPUT_BUFFER];
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# ifdef HAVE_PROC_LOADAVG
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FILE *fp;
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char *str, *next;
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# endif
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#endif
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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setlocale(LC_NUMERIC, "POSIX");
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if (process_arguments (argc, argv) == ERROR)
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usage4 (_("Could not parse arguments"));
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#ifdef HAVE_GETLOADAVG
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result = getloadavg (la, 3);
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if (result != 3)
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return STATE_UNKNOWN;
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#else
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# ifdef HAVE_PROC_LOADAVG
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fp = fopen (PROC_LOADAVG, "r");
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if (fp == NULL) {
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printf (_("Error opening %s\n"), PROC_LOADAVG);
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return STATE_UNKNOWN;
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}
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while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
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str = (char *)input_buffer;
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for(i = 0; i < 3; i++) {
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la[i] = strtod(str, &next);
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str = next;
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}
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}
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fclose (fp);
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# else
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child_process = spopen (PATH_TO_UPTIME);
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if (child_process == NULL) {
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printf (_("Error opening %s\n"), PATH_TO_UPTIME);
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return STATE_UNKNOWN;
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}
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child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
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if (child_stderr == NULL) {
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printf (_("Could not open stderr for %s\n"), PATH_TO_UPTIME);
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}
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fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
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sscanf (input_buffer, "%*[^l]load average: %lf, %lf, %lf", &la1, &la5, &la15);
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result = spclose (child_process);
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if (result) {
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printf (_("Error code %d returned in %s\n"), result, PATH_TO_UPTIME);
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return STATE_UNKNOWN;
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}
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# endif
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#endif
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if ((la[0] < 0.0) || (la[1] < 0.0) || (la[2] < 0.0)) {
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#ifdef HAVE_GETLOADAVG
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printf (_("Error in getloadavg()\n"));
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#else
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# ifdef HAVE_PROC_LOADAVG
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printf (_("Error processing %s\n"), PROC_LOADAVG);
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# else
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printf (_("Error processing %s\n"), PATH_TO_UPTIME);
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# endif
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#endif
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return STATE_UNKNOWN;
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}
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/* we got this far, so assume OK until we've measured */
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result = STATE_OK;
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asprintf(&status_line, _("load average: %.2f, %.2f, %.2f"), la1, la5, la15);
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for(i = 0; i < 3; i++) {
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if(la[i] > cload[i]) {
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result = STATE_CRITICAL;
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break;
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}
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else if(la[i] > wload[i]) result = STATE_WARNING;
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}
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printf("%s - %s|", state_text(result), status_line);
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for(i = 0; i < 3; i++)
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printf("load%d=%.3f;%.3f;%.3f;0; ", nums[i], la[i], wload[i], cload[i]);
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putchar('\n');
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return result;
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}
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/* process command-line arguments */
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static int
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process_arguments (int argc, char **argv)
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{
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int c = 0;
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int option = 0;
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static struct option longopts[] = {
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{"warning", required_argument, 0, 'w'},
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{"critical", 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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{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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while (1) {
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c = getopt_long (argc, argv, "Vhc:w:", longopts, &option);
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if (c == -1 || c == EOF)
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break;
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switch (c) {
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case 'w': /* warning time threshold */
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get_threshold(optarg, wload);
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break;
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case 'c': /* critical time threshold */
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get_threshold(optarg, cload);
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break;
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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 'h': /* help */
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print_help ();
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exit (STATE_OK);
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case '?': /* help */
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usage2 (_("Unknown argument"), optarg);
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}
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}
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c = optind;
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if (c == argc)
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return validate_arguments ();
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/* handle the case if both arguments are missing,
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* but not if only one is given without -c or -w flag */
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if(c - argc == 2) {
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get_threshold(argv[c++], wload);
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get_threshold(argv[c++], cload);
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}
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else if(c - argc == 1) {
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get_threshold(argv[c++], cload);
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}
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return validate_arguments ();
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}
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static int
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validate_arguments (void)
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{
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int i = 0;
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/* match cload first, as it will give the most friendly error message
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* if user hasn't given the -c switch properly */
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for(i = 0; i < 3; i++) {
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if(cload[i] < 0)
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die (STATE_UNKNOWN, _("Critical threshold for %d-minute load average is not specified\n"), nums[i]);
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if(wload[i] < 0)
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die (STATE_UNKNOWN, _("Warning threshold for %d-minute load average is not specified\n"), nums[i]);
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if(wload[i] > cload[i])
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die (STATE_UNKNOWN, _("Parameter inconsistency: %d-minute \"warning load\" is greater than \"critical load\"\n"), nums[i]);
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}
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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 (c) 1999 Felipe Gustavo de Almeida <galmeida@linux.ime.usp.br>\n");
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printf (COPYRIGHT, copyright, email);
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printf (_("This plugin tests the current system load average."));
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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", "-w, --warning=WLOAD1,WLOAD5,WLOAD15");
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printf (" %s\n", _("Exit with WARNING status if load average exceeds WLOADn"));
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printf (" %s\n", "-c, --critical=CLOAD1,CLOAD5,CLOAD15");
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printf (" %s\n", _("Exit with CRITICAL status if load average exceed CLOADn"));
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printf (" %s\n", _("the load average format is the same used by \"uptime\" and \"w\""));
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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 -w WLOAD1,WLOAD5,WLOAD15 -c CLOAD1,CLOAD5,CLOAD15\n", progname);
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}
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