1 /**
2 * collectd - src/tail.c
3 * Copyright (C) 2008 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 **/
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
30 #include "utils_tail_match.h"
32 /*
33 * <Plugin tail>
34 * <File "/var/log/exim4/mainlog">
35 * Instance "exim"
36 * Interval 60
37 * <Match>
38 * Regex "S=([1-9][0-9]*)"
39 * ExcludeRegex "U=root.*S="
40 * DSType "CounterAdd"
41 * Type "ipt_bytes"
42 * Instance "total"
43 * </Match>
44 * </File>
45 * </Plugin>
46 */
48 struct ctail_config_match_s
49 {
50 char *regex;
51 char *excluderegex;
52 int flags;
53 char *type;
54 char *type_instance;
55 cdtime_t interval;
56 };
57 typedef struct ctail_config_match_s ctail_config_match_t;
59 static cu_tail_match_t **tail_match_list = NULL;
60 static size_t tail_match_list_num = 0;
61 static cdtime_t tail_match_list_intervals[255];
63 static int ctail_config_add_match_dstype (ctail_config_match_t *cm,
64 oconfig_item_t *ci)
65 {
66 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
67 {
68 WARNING ("tail plugin: `DSType' needs exactly one string argument.");
69 return (-1);
70 }
72 if (strncasecmp ("Gauge", ci->values[0].value.string, strlen ("Gauge")) == 0)
73 {
74 cm->flags = UTILS_MATCH_DS_TYPE_GAUGE;
75 if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
76 cm->flags |= UTILS_MATCH_CF_GAUGE_AVERAGE;
77 else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
78 cm->flags |= UTILS_MATCH_CF_GAUGE_MIN;
79 else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
80 cm->flags |= UTILS_MATCH_CF_GAUGE_MAX;
81 else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
82 cm->flags |= UTILS_MATCH_CF_GAUGE_LAST;
83 else if (strcasecmp ("GaugeInc", ci->values[0].value.string) == 0)
84 cm->flags |= UTILS_MATCH_CF_GAUGE_INC;
85 else if (strcasecmp ("GaugeAdd", ci->values[0].value.string) == 0)
86 cm->flags |= UTILS_MATCH_CF_GAUGE_ADD;
87 else
88 cm->flags = 0;
89 }
90 else if (strncasecmp ("Counter", ci->values[0].value.string, strlen ("Counter")) == 0)
91 {
92 cm->flags = UTILS_MATCH_DS_TYPE_COUNTER;
93 if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
94 cm->flags |= UTILS_MATCH_CF_COUNTER_SET;
95 else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
96 cm->flags |= UTILS_MATCH_CF_COUNTER_ADD;
97 else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
98 cm->flags |= UTILS_MATCH_CF_COUNTER_INC;
99 else
100 cm->flags = 0;
101 }
102 else if (strncasecmp ("Derive", ci->values[0].value.string, strlen ("Derive")) == 0)
103 {
104 cm->flags = UTILS_MATCH_DS_TYPE_DERIVE;
105 if (strcasecmp ("DeriveSet", ci->values[0].value.string) == 0)
106 cm->flags |= UTILS_MATCH_CF_DERIVE_SET;
107 else if (strcasecmp ("DeriveAdd", ci->values[0].value.string) == 0)
108 cm->flags |= UTILS_MATCH_CF_DERIVE_ADD;
109 else if (strcasecmp ("DeriveInc", ci->values[0].value.string) == 0)
110 cm->flags |= UTILS_MATCH_CF_DERIVE_INC;
111 else
112 cm->flags = 0;
113 }
114 else if (strncasecmp ("Absolute", ci->values[0].value.string, strlen ("Absolute")) == 0)
115 {
116 cm->flags = UTILS_MATCH_DS_TYPE_ABSOLUTE;
117 if (strcasecmp ("AbsoluteSet", ci->values[0].value.string) == 0)
118 cm->flags |= UTILS_MATCH_CF_ABSOLUTE_SET;
119 else
120 cm->flags = 0;
121 }
122 else
123 {
124 cm->flags = 0;
125 }
127 if (cm->flags == 0)
128 {
129 WARNING ("tail plugin: `%s' is not a valid argument to `DSType'.",
130 ci->values[0].value.string);
131 return (-1);
132 }
134 return (0);
135 } /* int ctail_config_add_match_dstype */
137 static int ctail_config_add_match (cu_tail_match_t *tm,
138 const char *plugin_instance, oconfig_item_t *ci, cdtime_t interval)
139 {
140 ctail_config_match_t cm;
141 int status;
142 int i;
144 memset (&cm, '\0', sizeof (cm));
146 if (ci->values_num != 0)
147 {
148 WARNING ("tail plugin: Ignoring arguments for the `Match' block.");
149 }
151 status = 0;
152 for (i = 0; i < ci->children_num; i++)
153 {
154 oconfig_item_t *option = ci->children + i;
156 if (strcasecmp ("Regex", option->key) == 0)
157 status = cf_util_get_string (option, &cm.regex);
158 else if (strcasecmp ("ExcludeRegex", option->key) == 0)
159 status = cf_util_get_string (option, &cm.excluderegex);
160 else if (strcasecmp ("DSType", option->key) == 0)
161 status = ctail_config_add_match_dstype (&cm, option);
162 else if (strcasecmp ("Type", option->key) == 0)
163 status = cf_util_get_string (option, &cm.type);
164 else if (strcasecmp ("Instance", option->key) == 0)
165 status = cf_util_get_string (option, &cm.type_instance);
166 else
167 {
168 WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
169 status = -1;
170 }
172 if (status != 0)
173 break;
174 } /* for (i = 0; i < ci->children_num; i++) */
176 while (status == 0)
177 {
178 if (cm.regex == NULL)
179 {
180 WARNING ("tail plugin: `Regex' missing in `Match' block.");
181 status = -1;
182 break;
183 }
185 if (cm.type == NULL)
186 {
187 WARNING ("tail plugin: `Type' missing in `Match' block.");
188 status = -1;
189 break;
190 }
192 if (cm.flags == 0)
193 {
194 WARNING ("tail plugin: `DSType' missing in `Match' block.");
195 status = -1;
196 break;
197 }
199 break;
200 } /* while (status == 0) */
202 if (status == 0)
203 {
204 status = tail_match_add_match_simple (tm, cm.regex, cm.excluderegex,
205 cm.flags, "tail", plugin_instance, cm.type, cm.type_instance, interval);
207 if (status != 0)
208 {
209 ERROR ("tail plugin: tail_match_add_match_simple failed.");
210 }
211 }
213 sfree (cm.regex);
214 sfree (cm.excluderegex);
215 sfree (cm.type);
216 sfree (cm.type_instance);
218 return (status);
219 } /* int ctail_config_add_match */
221 static int ctail_config_add_file (oconfig_item_t *ci)
222 {
223 cu_tail_match_t *tm;
224 cdtime_t interval = 0;
225 char *plugin_instance = NULL;
226 int num_matches = 0;
227 int i;
229 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
230 {
231 WARNING ("tail plugin: `File' needs exactly one string argument.");
232 return (-1);
233 }
235 tm = tail_match_create (ci->values[0].value.string);
236 if (tm == NULL)
237 {
238 ERROR ("tail plugin: tail_match_create (%s) failed.",
239 ci->values[0].value.string);
240 return (-1);
241 }
243 for (i = 0; i < ci->children_num; i++)
244 {
245 oconfig_item_t *option = ci->children + i;
246 int status = 0;
248 if (strcasecmp ("Instance", option->key) == 0)
249 status = cf_util_get_string (option, &plugin_instance);
250 else if (strcasecmp ("Interval", option->key) == 0)
251 cf_util_get_cdtime (option, &interval);
252 else if (strcasecmp ("Match", option->key) == 0)
253 {
254 status = ctail_config_add_match (tm, plugin_instance, option, interval);
255 if (status == 0)
256 num_matches++;
257 /* Be mild with failed matches.. */
258 status = 0;
259 }
260 else
261 {
262 status = -1;
263 }
265 if (status != 0)
266 break;
267 } /* for (i = 0; i < ci->children_num; i++) */
269 sfree (plugin_instance);
271 if (num_matches == 0)
272 {
273 ERROR ("tail plugin: No (valid) matches found for file `%s'.",
274 ci->values[0].value.string);
275 tail_match_destroy (tm);
276 return (-1);
277 }
278 else
279 {
280 cu_tail_match_t **temp;
282 temp = (cu_tail_match_t **) realloc (tail_match_list,
283 sizeof (cu_tail_match_t *) * (tail_match_list_num + 1));
284 if (temp == NULL)
285 {
286 ERROR ("tail plugin: realloc failed.");
287 tail_match_destroy (tm);
288 return (-1);
289 }
291 tail_match_list = temp;
292 tail_match_list[tail_match_list_num] = tm;
293 tail_match_list_intervals[tail_match_list_num] = interval;
294 tail_match_list_num++;
295 }
297 return (0);
298 } /* int ctail_config_add_file */
300 static int ctail_config (oconfig_item_t *ci)
301 {
302 int i;
304 for (i = 0; i < ci->children_num; i++)
305 {
306 oconfig_item_t *option = ci->children + i;
308 if (strcasecmp ("File", option->key) == 0)
309 ctail_config_add_file (option);
310 else
311 {
312 WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
313 }
314 } /* for (i = 0; i < ci->children_num; i++) */
316 return (0);
317 } /* int ctail_config */
319 static int ctail_read (user_data_t *ud)
320 {
321 int status;
323 status = tail_match_read ((cu_tail_match_t *)ud->data);
324 if (status != 0)
325 {
326 ERROR ("tail plugin: tail_match_read failed.");
327 return (-1);
328 }
330 return (0);
331 } /* int ctail_read */
333 static int ctail_init (void)
334 {
335 char str[255];
336 user_data_t ud;
337 size_t i;
339 if (tail_match_list_num == 0)
340 {
341 WARNING ("tail plugin: File list is empty. Returning an error.");
342 return (-1);
343 }
345 memset(&ud, '\0', sizeof(ud));
347 for (i = 0; i < tail_match_list_num; i++)
348 {
349 ud.data = (void *)tail_match_list[i];
350 ssnprintf(str, sizeof(str), "tail-%zu", i);
351 plugin_register_complex_read (NULL, str, ctail_read, tail_match_list_intervals[i], &ud);
352 }
354 return (0);
355 } /* int ctail_init */
357 static int ctail_shutdown (void)
358 {
359 size_t i;
361 for (i = 0; i < tail_match_list_num; i++)
362 {
363 tail_match_destroy (tail_match_list[i]);
364 tail_match_list[i] = NULL;
365 }
366 sfree (tail_match_list);
367 tail_match_list_num = 0;
369 return (0);
370 } /* int ctail_shutdown */
372 void module_register (void)
373 {
374 plugin_register_complex_config ("tail", ctail_config);
375 plugin_register_init ("tail", ctail_init);
376 plugin_register_shutdown ("tail", ctail_shutdown);
377 } /* void module_register */
379 /* vim: set sw=2 sts=2 ts=8 : */