1 /******************************************************************************
2 *
3 * CHECK_LOAD.C
4 *
5 * Written by Felipe Gustavo de Almeida <galmeida@linux.ime.usp.br>
6 * License: GPL
7 * Command line: CHECK_LOAD <wload1> <cload1> <wload5> <cload5> <wload15> <cload15>
8 * First Written: 04/17/99
9 *
10 * Modifications:
11 *
12 * 05/18/1999 - Modified to work getloadavg where available, and use uptime
13 * where neither proc or getloadavg are found. Also use autoconf.
14 * mods by Karl DeBisschop (kdebiss@alum.mit.edu)
15 * 07/01/1999 - Added some #DEFINEs to allow compilation under NetBSD, as
16 * suggested by Andy Doran.
17 * mods by Ethan Galstad (nagios@nagios.org)
18 * 07/17/1999 - Initialized la[] array to prevent NetBSD from complaining
19 * mods by Ethan Galstad (nagios@nagios.org)
20 * 08/18/1999 - Integrated some code with common plugin utilities
21 * mods by Ethan Galstad (nagios@nagios.org)
22 * $Date$
23 * Note: The load format is the same used by "uptime" and "w"
24 *
25 *****************************************************************************/
27 const char *progname = "check_load";
28 const char *revision = "$Revision$";
29 const char *copyright = "1999-2003";
30 const char *email = "nagiosplug-devel@lists.sourceforge.net";
32 #include "common.h"
33 #include "utils.h"
34 #include "popen.h"
36 void
37 print_usage (void)
38 {
39 printf (_("Usage: %s -w WLOAD1,WLOAD5,WLOAD15 -c CLOAD1,CLOAD5,CLOAD15\n"),
40 progname);
41 printf (_(UT_HLP_VRS), progname, progname);
42 }
44 void
45 print_help (void)
46 {
47 print_revision (progname, revision);
49 printf (_("Copyright (c) 1999 Felipe Gustavo de Almeida <galmeida@linux.ime.usp.br>\n"));
50 printf (_(COPYRIGHT), copyright, email);
52 printf (_("This plugin tests the current system load average.\n\n"));
54 print_usage ();
56 printf (_(UT_HELP_VRSN));
58 printf (_("\
59 -w, --warning=WLOAD1,WLOAD5,WLOAD15\n\
60 Exit with WARNING status if load average exceeds WLOADn\n\
61 -c, --critical=CLOAD1,CLOAD5,CLOAD15\n\
62 Exit with CRITICAL status if load average exceed CLOADn\n\n\
63 the load average format is the same used by \"uptime\" and \"w\"\n\n"));
65 printf (_(UT_SUPPORT));
66 }
68 #ifdef HAVE_SYS_LOADAVG_H
69 #include <sys/loadavg.h>
70 #endif
72 /* needed for compilation under NetBSD, as suggested by Andy Doran */
73 #ifndef LOADAVG_1MIN
74 #define LOADAVG_1MIN 0
75 #define LOADAVG_5MIN 1
76 #define LOADAVG_15MIN 2
77 #endif /* !defined LOADAVG_1MIN */
80 int process_arguments (int argc, char **argv);
81 int validate_arguments (void);
83 float wload1 = -1, wload5 = -1, wload15 = -1;
84 float cload1 = -1, cload5 = -1, cload15 = -1;
86 char *status_line = "";
88 int
89 main (int argc, char **argv)
90 {
91 #if HAVE_GETLOADAVG==1
92 int result;
93 double la[3] = { 0.0, 0.0, 0.0 }; /* NetBSD complains about unitialized arrays */
94 #elif HAVE_PROC_LOADAVG==1
95 FILE *fp;
96 char input_buffer[MAX_INPUT_BUFFER];
97 char *tmp_ptr;
98 #else
99 int result;
100 char input_buffer[MAX_INPUT_BUFFER];
101 #endif
103 float la1, la5, la15;
105 if (process_arguments (argc, argv) == ERROR)
106 usage ("\n");
108 #if HAVE_GETLOADAVG==1
109 result = getloadavg (la, 3);
110 if (result == -1)
111 return STATE_UNKNOWN;
112 la1 = la[LOADAVG_1MIN];
113 la5 = la[LOADAVG_5MIN];
114 la15 = la[LOADAVG_15MIN];
115 #elif HAVE_PROC_LOADAVG==1
116 fp = fopen (PROC_LOADAVG, "r");
117 if (fp == NULL) {
118 printf (_("Error opening %s\n"), PROC_LOADAVG);
119 return STATE_UNKNOWN;
120 }
122 la1 = la5 = la15 = -1;
124 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
125 tmp_ptr = strtok (input_buffer, " ");
126 la1 = atof (tmp_ptr);
127 tmp_ptr = strtok (NULL, " ");
128 la5 = atof (tmp_ptr);
129 tmp_ptr = strtok (NULL, " ");
130 la15 = atof (tmp_ptr);
131 }
133 fclose (fp);
134 #else
135 child_process = spopen (PATH_TO_UPTIME);
136 if (child_process == NULL) {
137 printf (_("Error opening %s\n"), PATH_TO_UPTIME);
138 return STATE_UNKNOWN;
139 }
140 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
141 if (child_stderr == NULL) {
142 printf (_("Could not open stderr for %s\n"), PATH_TO_UPTIME);
143 }
144 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
145 sscanf (input_buffer, "%*[^l]load average: %f, %f, %f"), &la1, &la5, &la15);
147 result = spclose (child_process);
148 if (result) {
149 printf (_("Error code %d returned in %s\n"), result, PATH_TO_UPTIME);
150 return STATE_UNKNOWN;
151 }
152 #endif
154 if ((la1 == -1) || (la5 == -1) || (la15 == -1)) {
155 #if HAVE_GETLOADAVG==1
156 printf (_("Error in getloadavg()\n"));
157 #elif HAVE_PROC_LOADAVG==1
158 printf (_("Error processing %s\n"), PROC_LOADAVG);
159 #else
160 printf (_("Error processing %s\n"), PATH_TO_UPTIME);
161 #endif
162 return STATE_UNKNOWN;
163 }
164 asprintf(&status_line, _("load average: %.2f, %.2f, %.2f"), la1, la5, la15);
165 if ((la1 >= cload1) || (la5 >= cload5) || (la15 >= cload15)) {
166 printf(_("CRITICAL - %s\n"), status_line);
167 return STATE_CRITICAL;
168 }
169 if ((la1 >= wload1) || (la5 >= wload5) || (la15 >= wload15)) {
170 printf (_("WARNING - %s\n"), status_line);
171 return STATE_WARNING;
172 }
173 printf (_("OK - %s\n"), status_line);
174 return STATE_OK;
175 }
181 /* process command-line arguments */
182 int
183 process_arguments (int argc, char **argv)
184 {
185 int c = 0;
187 int option_index = 0;
188 static struct option long_options[] = {
189 {"warning", required_argument, 0, 'w'},
190 {"critical", required_argument, 0, 'c'},
191 {"version", no_argument, 0, 'V'},
192 {"help", no_argument, 0, 'h'},
193 {0, 0, 0, 0}
194 };
196 if (argc < 2)
197 return ERROR;
199 while (1) {
200 c = getopt_long (argc, argv, "Vhc:w:", long_options, &option_index);
202 if (c == -1 || c == EOF)
203 break;
205 switch (c) {
206 case 'w': /* warning time threshold */
207 if (is_intnonneg (optarg)) {
208 wload1 = atof (optarg);
209 wload5 = atof (optarg);
210 wload15 = atof (optarg);
211 break;
212 }
213 else if (strstr (optarg, ",") &&
214 sscanf (optarg, "%f,%f,%f", &wload1, &wload5, &wload15) == 3)
215 break;
216 else if (strstr (optarg, ":") &&
217 sscanf (optarg, "%f:%f:%f", &wload1, &wload5, &wload15) == 3)
218 break;
219 else
220 usage (_("Warning threshold must be float or float triplet!\n"));
221 break;
222 case 'c': /* critical time threshold */
223 if (is_intnonneg (optarg)) {
224 cload1 = atof (optarg);
225 cload5 = atof (optarg);
226 cload15 = atof (optarg);
227 break;
228 }
229 else if (strstr (optarg, ",") &&
230 sscanf (optarg, "%f,%f,%f", &cload1, &cload5, &cload15) == 3)
231 break;
232 else if (strstr (optarg, ":") &&
233 sscanf (optarg, "%f:%f:%f", &cload1, &cload5, &cload15) == 3)
234 break;
235 else
236 usage (_("Critical threshold must be float or float triplet!\n"));
237 break;
238 case 'V': /* version */
239 print_revision (progname, "$Revision$");
240 exit (STATE_OK);
241 case 'h': /* help */
242 print_help ();
243 exit (STATE_OK);
244 case '?': /* help */
245 usage (_("Invalid argument\n"));
246 }
247 }
249 c = optind;
250 if (c == argc)
251 return validate_arguments ();
252 if (wload1 < 0 && is_nonnegative (argv[c]))
253 wload1 = atof (argv[c++]);
255 if (c == argc)
256 return validate_arguments ();
257 if (cload1 < 0 && is_nonnegative (argv[c]))
258 cload1 = atof (argv[c++]);
260 if (c == argc)
261 return validate_arguments ();
262 if (wload5 < 0 && is_nonnegative (argv[c]))
263 wload5 = atof (argv[c++]);
265 if (c == argc)
266 return validate_arguments ();
267 if (cload5 < 0 && is_nonnegative (argv[c]))
268 cload5 = atof (argv[c++]);
270 if (c == argc)
271 return validate_arguments ();
272 if (wload15 < 0 && is_nonnegative (argv[c]))
273 wload15 = atof (argv[c++]);
275 if (c == argc)
276 return validate_arguments ();
277 if (cload15 < 0 && is_nonnegative (argv[c]))
278 cload15 = atof (argv[c++]);
280 return validate_arguments ();
281 }
287 int
288 validate_arguments (void)
289 {
290 if (wload1 < 0)
291 usage (_("Warning threshold for 1-minute load average is not specified\n"));
292 if (wload5 < 0)
293 usage (_("Warning threshold for 5-minute load average is not specified\n"));
294 if (wload15 < 0)
295 usage (_("Warning threshold for 15-minute load average is not specified\n"));
296 if (cload1 < 0)
297 usage (_("Critical threshold for 1-minute load average is not specified\n"));
298 if (cload5 < 0)
299 usage (_("Critical threshold for 5-minute load average is not specified\n"));
300 if (cload15 < 0)
301 usage (_("Critical threshold for 15-minute load average is not specified\n"));
302 if (wload1 > cload1)
303 usage (_("Parameter inconsistency: 1-minute \"warning load\" greater than \"critical load\".\n"));
304 if (wload5 > cload5)
305 usage (_("Parameter inconsistency: 5-minute \"warning load\" greater than \"critical load\".\n"));
306 if (wload15 > cload15)
307 usage (_("Parameter inconsistency: 15-minute \"warning load\" greater than \"critical load\".\n"));
308 return OK;
309 }