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 #include "config.h"
28 #include "common.h"
29 #include "utils.h"
31 #ifdef HAVE_SYS_LOADAVG_H
32 #include <sys/loadavg.h>
33 #endif
35 /* needed for compilation under NetBSD, as suggested by Andy Doran */
36 #ifndef LOADAVG_1MIN
37 #define LOADAVG_1MIN 0
38 #define LOADAVG_5MIN 1
39 #define LOADAVG_15MIN 2
40 #endif /* !defined LOADAVG_1MIN */
42 #include "popen.h"
43 #ifdef HAVE_PROC_LOADAVG
45 #endif
47 const char *progname = "check_load";
49 int process_arguments (int argc, char **argv);
50 int validate_arguments (void);
51 void print_usage (void);
52 void print_help (void);
54 float wload1 = -1, wload5 = -1, wload15 = -1;
55 float cload1 = -1, cload5 = -1, cload15 = -1;
57 int
58 main (int argc, char **argv)
59 {
60 #if HAVE_GETLOADAVG==1
61 int result;
62 double la[3] = { 0.0, 0.0, 0.0 }; /* NetBSD complains about unitialized arrays */
63 #elif HAVE_PROC_LOADAVG==1
64 FILE *fp;
65 char input_buffer[MAX_INPUT_BUFFER];
66 char *tmp_ptr;
67 #else
68 int result;
69 char input_buffer[MAX_INPUT_BUFFER];
70 #endif
72 float la1, la5, la15;
74 if (process_arguments (argc, argv) == ERROR)
75 usage ("\n");
77 #if HAVE_GETLOADAVG==1
78 result = getloadavg (la, 3);
79 if (result == -1)
80 return STATE_UNKNOWN;
81 la1 = la[LOADAVG_1MIN];
82 la5 = la[LOADAVG_5MIN];
83 la15 = la[LOADAVG_15MIN];
84 #elif HAVE_PROC_LOADAVG==1
85 fp = fopen (PROC_LOADAVG, "r");
86 if (fp == NULL) {
87 printf ("Error opening %s\n", PROC_LOADAVG);
88 return STATE_UNKNOWN;
89 }
91 la1 = la5 = la15 = -1;
93 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
94 tmp_ptr = strtok (input_buffer, " ");
95 la1 = atof (tmp_ptr);
96 tmp_ptr = strtok (NULL, " ");
97 la5 = atof (tmp_ptr);
98 tmp_ptr = strtok (NULL, " ");
99 la15 = atof (tmp_ptr);
100 }
102 fclose (fp);
103 #else
104 child_process = spopen (PATH_TO_UPTIME);
105 if (child_process == NULL) {
106 printf ("Error opening %s\n", PATH_TO_UPTIME);
107 return STATE_UNKNOWN;
108 }
109 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
110 if (child_stderr == NULL) {
111 printf ("Could not open stderr for %s\n", PATH_TO_UPTIME);
112 }
113 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
114 sscanf (input_buffer, "%*[^l]load average: %f, %f, %f", &la1, &la5, &la15);
116 result = spclose (child_process);
117 if (result) {
118 printf ("Error code %d returned in %s\n", result, PATH_TO_UPTIME);
119 return STATE_UNKNOWN;
120 }
121 #endif
123 if ((la1 == -1) || (la5 == -1) || (la15 == -1)) {
124 #if HAVE_GETLOADAVG==1
125 printf ("Error in getloadavg()\n");
126 #elif HAVE_PROC_LOADAVG==1
127 printf ("Error processing %s\n", PROC_LOADAVG);
128 #else
129 printf ("Error processing %s\n", PATH_TO_UPTIME);
130 #endif
131 return STATE_UNKNOWN;
132 }
133 printf ("load average: %.2f, %.2f, %.2f", la1, la5, la15);
134 if ((la1 >= cload1) || (la5 >= cload5) || (la15 >= cload15)) {
135 printf (" CRITICAL\n");
136 return STATE_CRITICAL;
137 }
138 if ((la1 >= wload1) || (la5 >= wload5) || (la15 >= wload15)) {
139 printf (" WARNING\n");
140 return STATE_WARNING;
141 }
142 printf ("\n");
143 return STATE_OK;
144 }
150 /* process command-line arguments */
151 int
152 process_arguments (int argc, char **argv)
153 {
154 int c = 0;
156 #ifdef HAVE_GETOPT_H
157 int option_index = 0;
158 static struct option long_options[] = {
159 {"warning", required_argument, 0, 'w'},
160 {"critical", required_argument, 0, 'c'},
161 {"version", no_argument, 0, 'V'},
162 {"help", no_argument, 0, 'h'},
163 {0, 0, 0, 0}
164 };
165 #endif
167 #define OPTCHARS "Vhc:w:"
169 if (argc < 2)
170 return ERROR;
172 while (1) {
173 #ifdef HAVE_GETOPT_H
174 c = getopt_long (argc, argv, OPTCHARS, long_options, &option_index);
175 #else
176 c = getopt (argc, argv, OPTCHARS);
177 #endif
178 if (c == -1 || c == EOF)
179 break;
181 switch (c) {
182 case 'w': /* warning time threshold */
183 if (is_intnonneg (optarg)) {
184 wload1 = atof (optarg);
185 wload5 = atof (optarg);
186 wload15 = atof (optarg);
187 break;
188 }
189 else if (strstr (optarg, ",") &&
190 sscanf (optarg, "%f,%f,%f", &wload1, &wload5, &wload15) == 3)
191 break;
192 else if (strstr (optarg, ":") &&
193 sscanf (optarg, "%f:%f:%f", &wload1, &wload5, &wload15) == 3)
194 break;
195 else
196 usage ("Warning threshold must be float or float triplet!\n");
197 break;
198 case 'c': /* critical time threshold */
199 if (is_intnonneg (optarg)) {
200 cload1 = atof (optarg);
201 cload5 = atof (optarg);
202 cload15 = atof (optarg);
203 break;
204 }
205 else if (strstr (optarg, ",") &&
206 sscanf (optarg, "%f,%f,%f", &cload1, &cload5, &cload15) == 3)
207 break;
208 else if (strstr (optarg, ":") &&
209 sscanf (optarg, "%f:%f:%f", &cload1, &cload5, &cload15) == 3)
210 break;
211 else
212 usage ("Critical threshold must be float or float triplet!\n");
213 break;
214 case 'V': /* version */
215 print_revision (progname, "$Revision$");
216 exit (STATE_OK);
217 case 'h': /* help */
218 print_help ();
219 exit (STATE_OK);
220 case '?': /* help */
221 usage ("Invalid argument\n");
222 }
223 }
225 c = optind;
226 if (c == argc)
227 return validate_arguments ();
228 if (wload1 < 0 && is_nonnegative (argv[c]))
229 wload1 = atof (argv[c++]);
231 if (c == argc)
232 return validate_arguments ();
233 if (cload1 < 0 && is_nonnegative (argv[c]))
234 cload1 = atof (argv[c++]);
236 if (c == argc)
237 return validate_arguments ();
238 if (wload5 < 0 && is_nonnegative (argv[c]))
239 wload5 = atof (argv[c++]);
241 if (c == argc)
242 return validate_arguments ();
243 if (cload5 < 0 && is_nonnegative (argv[c]))
244 cload5 = atof (argv[c++]);
246 if (c == argc)
247 return validate_arguments ();
248 if (wload15 < 0 && is_nonnegative (argv[c]))
249 wload15 = atof (argv[c++]);
251 if (c == argc)
252 return validate_arguments ();
253 if (cload15 < 0 && is_nonnegative (argv[c]))
254 cload15 = atof (argv[c++]);
256 return validate_arguments ();
257 }
263 int
264 validate_arguments (void)
265 {
266 if (wload1 < 0)
267 usage ("Warning threshold for 1-minute load average is not specified\n");
268 if (wload5 < 0)
269 usage ("Warning threshold for 5-minute load average is not specified\n");
270 if (wload15 < 0)
271 usage ("Warning threshold for 15-minute load average is not specified\n");
272 if (cload1 < 0)
273 usage ("Critical threshold for 1-minute load average is not specified\n");
274 if (cload5 < 0)
275 usage ("Critical threshold for 5-minute load average is not specified\n");
276 if (cload15 < 0)
277 usage ("Critical threshold for 15-minute load average is not specified\n");
278 if (wload1 > cload1)
279 usage ("Parameter inconsistency: 1-minute \"warning load\" greater than \"critical load\".\n");
280 if (wload5 > cload5)
281 usage ("Parameter inconsistency: 5-minute \"warning load\" greater than \"critical load\".\n");
282 if (wload15 > cload15)
283 usage ("Parameter inconsistency: 15-minute \"warning load\" greater than \"critical load\".\n");
284 return OK;
285 }
291 void
292 print_usage (void)
293 {
294 printf
295 ("Usage: check_load -w WLOAD1,WLOAD5,WLOAD15 -c CLOAD1,CLOAD5,CLOAD15\n"
296 " check_load --version\n" " check_load --help\n");
297 }
303 void
304 print_help (void)
305 {
306 print_revision (progname, "$Revision$");
307 printf
308 ("Copyright (c) 1999 Felipe Gustavo de Almeida <galmeida@linux.ime.usp.br>\n"
309 "Copyright (c) 2000 Karl DeBisschop\n\n"
310 "This plugin tests the current system load average.\n\n");
311 print_usage ();
312 printf
313 ("\nOptions:\n"
314 " -w, --warning=WLOAD1,WLOAD5,WLOAD15\n"
315 " Exit with WARNING status if load average exceeds WLOADn\n"
316 " -c, --critical=CLOAD1,CLOAD5,CLOAD15\n"
317 " Exit with CRITICAL status if load average exceed CLOADn\n"
318 " -h, --help\n"
319 " Print detailed help screen\n"
320 " -V, --version\n"
321 " Print version information\n\n"
322 "the load average format is the same used by \"uptime\" and \"w\"\n\n");
323 support ();
324 }