1 #include "config.h"
3 #include <stdlib.h>
4 #include <unistd.h>
5 #include <stdio.h>
6 #include <errno.h>
7 #include <string.h>
8 #include <assert.h>
10 #include <sys/socket.h>
11 #include <sys/un.h>
13 /*
14 * This is copied directly from collectd.h. Make changes there!
15 */
16 #if NAN_STATIC_DEFAULT
17 # include <math.h>
18 /* #endif NAN_STATIC_DEFAULT*/
19 #elif NAN_STATIC_ISOC
20 # ifndef __USE_ISOC99
21 # define DISABLE_ISOC99 1
22 # define __USE_ISOC99 1
23 # endif /* !defined(__USE_ISOC99) */
24 # include <math.h>
25 # if DISABLE_ISOC99
26 # undef DISABLE_ISOC99
27 # undef __USE_ISOC99
28 # endif /* DISABLE_ISOC99 */
29 /* #endif NAN_STATIC_ISOC */
30 #elif NAN_ZERO_ZERO
31 # include <math.h>
32 # ifdef NAN
33 # undef NAN
34 # endif
35 # define NAN (0.0 / 0.0)
36 # ifndef isnan
37 # define isnan(f) ((f) != (f))
38 # endif /* !defined(isnan) */
39 #endif /* NAN_ZERO_ZERO */
41 #define RET_OKAY 0
42 #define RET_WARNING 1
43 #define RET_CRITICAL 2
44 #define RET_UNKNOWN 3
46 #define CON_NONE 0
47 #define CON_AVERAGE 1
48 #define CON_SUM 2
50 struct range_s
51 {
52 double min;
53 double max;
54 int invert;
55 };
56 typedef struct range_s range_t;
58 extern char *optarg;
59 extern int optind, opterr, optopt;
61 static char *socket_file_g = NULL;
62 static char *value_string_g = NULL;
63 static char *hostname_g = NULL;
65 static range_t range_critical_g;
66 static range_t range_warning_g;
67 static int consolitation_g = CON_NONE;
69 static char **match_ds_g = NULL;
70 static int match_ds_num_g = 0;
72 static int ignore_ds (const char *name)
73 {
74 int i;
76 if (match_ds_g == NULL)
77 return (0);
79 for (i = 0; i < match_ds_num_g; i++)
80 if (strcasecmp (match_ds_g[i], name) == 0)
81 return (0);
83 return (1);
84 } /* int ignore_ds */
86 static void parse_range (char *string, range_t *range)
87 {
88 char *min_ptr;
89 char *max_ptr;
91 if (*string == '@')
92 {
93 range->invert = 1;
94 string++;
95 }
97 max_ptr = strchr (string, ':');
98 if (max_ptr == NULL)
99 {
100 min_ptr = NULL;
101 max_ptr = string;
102 }
103 else
104 {
105 min_ptr = string;
106 *max_ptr = '\0';
107 max_ptr++;
108 }
110 assert (max_ptr != NULL);
112 /* `10' == `0:10' */
113 if (min_ptr == NULL)
114 range->min = 0.0;
115 /* :10 == ~:10 == -inf:10 */
116 else if ((*min_ptr == '\0') || (*min_ptr == '~'))
117 range->min = NAN;
118 else
119 range->min = atof (min_ptr);
121 if ((*max_ptr == '\0') || (*max_ptr == '~'))
122 range->max = NAN;
123 else
124 range->max = atof (max_ptr);
125 } /* void parse_range */
127 int match_range (range_t *range, double value)
128 {
129 int ret = 0;
131 if (!isnan (range->min) && (range->min > value))
132 ret = 1;
133 if (!isnan (range->max) && (range->max < value))
134 ret = 1;
136 return (((ret - range->invert) == 0) ? 0 : 1);
137 }
139 static int get_values (int *ret_values_num, double **ret_values,
140 char ***ret_values_names)
141 {
142 struct sockaddr_un sa;
143 int status;
144 int fd;
145 FILE *fh_in, *fh_out;
146 char buffer[4096];
148 int values_num;
149 double *values;
150 char **values_names;
152 int i;
154 fd = socket (PF_UNIX, SOCK_STREAM, 0);
155 if (fd < 0)
156 {
157 fprintf (stderr, "socket failed: %s\n",
158 strerror (errno));
159 return (-1);
160 }
162 memset (&sa, '\0', sizeof (sa));
163 sa.sun_family = AF_UNIX;
164 strncpy (sa.sun_path, socket_file_g,
165 sizeof (sa.sun_path) - 1);
167 status = connect (fd, (struct sockaddr *) &sa, sizeof (sa));
168 if (status != 0)
169 {
170 fprintf (stderr, "connect failed: %s\n",
171 strerror (errno));
172 return (-1);
173 }
175 fh_in = fdopen (fd, "r");
176 if (fh_in == NULL)
177 {
178 fprintf (stderr, "fdopen failed: %s\n",
179 strerror (errno));
180 close (fd);
181 return (-1);
182 }
184 fh_out = fdopen (fd, "w");
185 if (fh_out == NULL)
186 {
187 fprintf (stderr, "fdopen failed: %s\n",
188 strerror (errno));
189 fclose (fh_in);
190 return (-1);
191 }
193 fprintf (fh_out, "GETVAL %s/%s\n", hostname_g, value_string_g);
194 fflush (fh_out);
196 if (fgets (buffer, sizeof (buffer), fh_in) == NULL)
197 {
198 fprintf (stderr, "fgets failed: %s\n",
199 strerror (errno));
200 fclose (fh_in);
201 fclose (fh_out);
202 return (-1);
203 }
205 {
206 char *ptr = strchr (buffer, ' ');
208 if (ptr != NULL)
209 *ptr = '\0';
211 values_num = atoi (buffer);
212 if (values_num < 1)
213 return (-1);
214 }
216 values = (double *) malloc (values_num * sizeof (double));
217 if (values == NULL)
218 {
219 fprintf (stderr, "malloc failed: %s\n",
220 strerror (errno));
221 return (-1);
222 }
224 values_names = (char **) malloc (values_num * sizeof (char *));
225 if (values_names == NULL)
226 {
227 fprintf (stderr, "malloc failed: %s\n",
228 strerror (errno));
229 free (values);
230 return (-1);
231 }
233 i = 0;
234 while (fgets (buffer, sizeof (buffer), fh_in) != NULL)
235 {
236 char *key;
237 char *value;
239 key = buffer;
241 value = strchr (key, '=');
242 if (value == NULL)
243 continue;
244 *value = '\0'; value++;
246 if (ignore_ds (key) != 0)
247 continue;
249 values_names[i] = strdup (key);
250 values[i] = atof (value);
252 i++;
253 if (i >= values_num)
254 break;
255 }
256 values_num = i;
258 fclose (fh_in); fh_in = NULL; fd = -1;
259 fclose (fh_out); fh_out = NULL;
261 *ret_values_num = values_num;
262 *ret_values = values;
263 *ret_values_names = values_names;
265 return (0);
266 } /* int get_values */
268 static void usage (const char *name)
269 {
270 fprintf (stderr, "Usage: %s <-s socket> <-n value_spec> <-H hostname> [options]\n"
271 "\n"
272 "Valid options are:\n"
273 " -s <socket> Path to collectd's UNIX-socket.\n"
274 " -n <v_spec> Value specification to get from collectd.\n"
275 " Format: `plugin-instance/type-instance'\n"
276 " -d <ds> Select the DS to examine. May be repeated to examine multiple\n"
277 " DSes. By default all DSes are used.\n"
278 " -g <consol> Method to use to consolidate several DSes.\n"
279 " Valid arguments are `none', `average' and `sum'\n"
280 " -H <host> Hostname to query the values for.\n"
281 " -c <range> Critical range\n"
282 " -w <range> Warning range\n"
283 "\n"
284 "Consolidation functions:\n"
285 " none: Apply the warning- and critical-ranges to each data-source\n"
286 " individually.\n"
287 " average: Calculate the average of all matching DSes and apply the\n"
288 " warning- and critical-ranges to the calculated average.\n"
289 " sum: Apply the ranges to the sum of all DSes.\n"
290 "\n", name);
291 exit (1);
292 } /* void usage */
294 int do_check_con_none (int values_num, double *values, char **values_names)
295 {
296 int i;
298 int num_critical = 0;
299 int num_warning = 0;
300 int num_okay = 0;
302 for (i = 0; i < values_num; i++)
303 {
304 if (isnan (values[i]))
305 num_warning++;
306 else if (match_range (&range_critical_g, values[i]) != 0)
307 num_critical++;
308 else if (match_range (&range_warning_g, values[i]) != 0)
309 num_warning++;
310 else
311 num_okay++;
312 }
314 printf ("%i critical, %i warning, %i okay",
315 num_critical, num_warning, num_okay);
316 if (values_num > 0)
317 {
318 printf (" |");
319 for (i = 0; i < values_num; i++)
320 printf (" %s=%lf;;;;", values_names[i], values[i]);
321 }
322 printf ("\n");
324 if ((num_critical != 0) || (values_num == 0))
325 return (RET_CRITICAL);
326 else if (num_warning != 0)
327 return (RET_WARNING);
329 return (RET_OKAY);
330 } /* int do_check_con_none */
332 int do_check_con_average (int values_num, double *values, char **values_names)
333 {
334 int i;
335 double total;
336 int total_num;
337 double average;
339 total = 0.0;
340 total_num = 0;
341 for (i = 0; i < values_num; i++)
342 {
343 if (!isnan (values[i]))
344 {
345 total += values[i];
346 total_num++;
347 }
348 }
350 if (total_num == 0)
351 average = NAN;
352 else
353 average = total / total_num;
354 printf ("%lf average |", average);
355 for (i = 0; i < values_num; i++)
356 printf (" %s=%lf;;;;", values_names[i], values[i]);
358 if (total_num == 0)
359 return (RET_WARNING);
361 if (isnan (average)
362 || match_range (&range_critical_g, average))
363 return (RET_CRITICAL);
364 else if (match_range (&range_warning_g, average) != 0)
365 return (RET_WARNING);
367 return (RET_OKAY);
368 } /* int do_check_con_average */
370 int do_check_con_sum (int values_num, double *values, char **values_names)
371 {
372 int i;
373 double total;
374 int total_num;
376 total = 0.0;
377 total_num = 0;
378 for (i = 0; i < values_num; i++)
379 {
380 if (!isnan (values[i]))
381 {
382 total += values[i];
383 total_num++;
384 }
385 }
387 if (total_num == 0)
388 {
389 printf ("WARNING: No defined values found\n");
390 return (RET_WARNING);
391 }
393 if (match_range (&range_critical_g, total) != 0)
394 {
395 printf ("CRITICAL: Sum = %lf\n", total);
396 return (RET_CRITICAL);
397 }
398 else if (match_range (&range_warning_g, total) != 0)
399 {
400 printf ("WARNING: Sum = %lf\n", total);
401 return (RET_WARNING);
402 }
403 else
404 {
405 printf ("OKAY: Sum = %lf\n", total);
406 return (RET_OKAY);
407 }
409 return (RET_UNKNOWN);
410 } /* int do_check_con_sum */
412 int do_check (void)
413 {
414 double *values;
415 char **values_names;
416 int values_num;
418 if (get_values (&values_num, &values, &values_names) != 0)
419 {
420 fputs ("ERROR: Cannot get values from daemon\n", stdout);
421 return (RET_CRITICAL);
422 }
424 if (consolitation_g == CON_NONE)
425 return (do_check_con_none (values_num, values, values_names));
426 else if (consolitation_g == CON_AVERAGE)
427 return (do_check_con_average (values_num, values, values_names));
428 else if (consolitation_g == CON_SUM)
429 return (do_check_con_sum (values_num, values, values_names));
431 free (values);
432 free (values_names); /* FIXME? */
434 return (RET_UNKNOWN);
435 }
437 int main (int argc, char **argv)
438 {
439 range_critical_g.min = NAN;
440 range_critical_g.max = NAN;
441 range_critical_g.invert = 0;
443 range_warning_g.min = NAN;
444 range_warning_g.max = NAN;
445 range_warning_g.invert = 0;
447 while (42)
448 {
449 int c;
451 c = getopt (argc, argv, "w:c:s:n:H:g:d:h");
452 if (c < 0)
453 break;
455 switch (c)
456 {
457 case 'c':
458 parse_range (optarg, &range_critical_g);
459 break;
460 case 'w':
461 parse_range (optarg, &range_warning_g);
462 break;
463 case 's':
464 socket_file_g = optarg;
465 break;
466 case 'n':
467 value_string_g = optarg;
468 break;
469 case 'H':
470 hostname_g = optarg;
471 break;
472 case 'g':
473 if (strcasecmp (optarg, "none") == 0)
474 consolitation_g = CON_NONE;
475 else if (strcasecmp (optarg, "average") == 0)
476 consolitation_g = CON_AVERAGE;
477 else if (strcasecmp (optarg, "sum") == 0)
478 consolitation_g = CON_SUM;
479 else
480 usage (argv[0]);
481 break;
482 case 'd':
483 {
484 char **tmp;
485 tmp = (char **) realloc (match_ds_g,
486 (match_ds_num_g + 1)
487 * sizeof (char *));
488 if (tmp == NULL)
489 {
490 fprintf (stderr, "realloc failed: %s\n",
491 strerror (errno));
492 return (RET_UNKNOWN);
493 }
494 match_ds_g = tmp;
495 match_ds_g[match_ds_num_g] = strdup (optarg);
496 if (match_ds_g[match_ds_num_g] == NULL)
497 {
498 fprintf (stderr, "strdup failed: %s\n",
499 strerror (errno));
500 return (RET_UNKNOWN);
501 }
502 match_ds_num_g++;
503 break;
504 }
505 default:
506 usage (argv[0]);
507 } /* switch (c) */
508 }
510 if ((socket_file_g == NULL) || (value_string_g == NULL)
511 || (hostname_g == NULL))
512 usage (argv[0]);
514 return (do_check ());
515 } /* int main */