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