2 * collectd - src/tail.c
3 * Copyright (C) 2008 Florian octo Forster
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
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.
24 * Florian octo Forster <octo at collectd.org>
31 #include "utils_latency_config.h"
32 #include "utils_tail_match.h"
36 * <File "/var/log/exim4/mainlog">
41 * Regex "S=([1-9][0-9]*)"
42 * ExcludeRegex "U=root.*S="
51 struct ctail_config_match_s {
58 latency_config_t latency;
60 typedef struct ctail_config_match_s ctail_config_match_t;
62 static cu_tail_match_t **tail_match_list;
63 static size_t tail_match_list_num;
64 static cdtime_t tail_match_list_intervals[255];
66 static int ctail_config_add_match_dstype(ctail_config_match_t *cm,
68 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
69 WARNING("tail plugin: `DSType' needs exactly one string argument.");
73 char const *ds_type = ci->values[0].value.string;
74 if (strncasecmp("Gauge", ds_type, strlen("Gauge")) == 0) {
75 cm->flags = UTILS_MATCH_DS_TYPE_GAUGE;
76 if (strcasecmp("GaugeAverage", ds_type) == 0)
77 cm->flags |= UTILS_MATCH_CF_GAUGE_AVERAGE;
78 else if (strcasecmp("GaugeMin", ds_type) == 0)
79 cm->flags |= UTILS_MATCH_CF_GAUGE_MIN;
80 else if (strcasecmp("GaugeMax", ds_type) == 0)
81 cm->flags |= UTILS_MATCH_CF_GAUGE_MAX;
82 else if (strcasecmp("GaugeLast", ds_type) == 0)
83 cm->flags |= UTILS_MATCH_CF_GAUGE_LAST;
84 else if (strcasecmp("GaugeInc", ds_type) == 0)
85 cm->flags |= UTILS_MATCH_CF_GAUGE_INC;
86 else if (strcasecmp("GaugeAdd", ds_type) == 0)
87 cm->flags |= UTILS_MATCH_CF_GAUGE_ADD;
88 else if (strcasecmp("GaugePersist", ci->values[0].value.string) == 0)
89 cm->flags |= UTILS_MATCH_CF_GAUGE_PERSIST;
92 } else if (strcasecmp("Distribution", ds_type) == 0) {
93 cm->flags = UTILS_MATCH_DS_TYPE_GAUGE | UTILS_MATCH_CF_GAUGE_DIST;
95 int status = latency_config(&cm->latency, ci, "tail");
98 } else if (strncasecmp("Counter", ds_type, strlen("Counter")) == 0) {
99 cm->flags = UTILS_MATCH_DS_TYPE_COUNTER;
100 if (strcasecmp("CounterSet", ds_type) == 0)
101 cm->flags |= UTILS_MATCH_CF_COUNTER_SET;
102 else if (strcasecmp("CounterAdd", ds_type) == 0)
103 cm->flags |= UTILS_MATCH_CF_COUNTER_ADD;
104 else if (strcasecmp("CounterInc", ds_type) == 0)
105 cm->flags |= UTILS_MATCH_CF_COUNTER_INC;
108 } else if (strncasecmp("Derive", ds_type, strlen("Derive")) == 0) {
109 cm->flags = UTILS_MATCH_DS_TYPE_DERIVE;
110 if (strcasecmp("DeriveSet", ds_type) == 0)
111 cm->flags |= UTILS_MATCH_CF_DERIVE_SET;
112 else if (strcasecmp("DeriveAdd", ds_type) == 0)
113 cm->flags |= UTILS_MATCH_CF_DERIVE_ADD;
114 else if (strcasecmp("DeriveInc", ds_type) == 0)
115 cm->flags |= UTILS_MATCH_CF_DERIVE_INC;
118 } else if (strncasecmp("Absolute", ds_type, strlen("Absolute")) == 0) {
119 cm->flags = UTILS_MATCH_DS_TYPE_ABSOLUTE;
120 if (strcasecmp("AbsoluteSet", ds_type) == 0)
121 cm->flags |= UTILS_MATCH_CF_ABSOLUTE_SET;
128 if (cm->flags == 0) {
129 WARNING("tail plugin: `%s' is not a valid argument to `DSType'.",
130 ci->values[0].value.string);
135 } /* int ctail_config_add_match_dstype */
137 static int ctail_config_add_match(cu_tail_match_t *tm, const char *plugin_name,
138 const char *plugin_instance,
139 oconfig_item_t *ci, cdtime_t interval) {
140 ctail_config_match_t cm = {0};
143 if (ci->values_num != 0) {
144 WARNING("tail plugin: Ignoring arguments for the `Match' block.");
148 for (int i = 0; i < ci->children_num; i++) {
149 oconfig_item_t *option = ci->children + i;
151 if (strcasecmp("Regex", option->key) == 0)
152 status = cf_util_get_string(option, &cm.regex);
153 else if (strcasecmp("ExcludeRegex", option->key) == 0)
154 status = cf_util_get_string(option, &cm.excluderegex);
155 else if (strcasecmp("DSType", option->key) == 0)
156 status = ctail_config_add_match_dstype(&cm, option);
157 else if (strcasecmp("Type", option->key) == 0)
158 status = cf_util_get_string(option, &cm.type);
159 else if (strcasecmp("Instance", option->key) == 0)
160 status = cf_util_get_string(option, &cm.type_instance);
162 WARNING("tail plugin: Option `%s' not allowed here.", option->key);
168 } /* for (i = 0; i < ci->children_num; i++) */
170 while (status == 0) {
171 if (cm.regex == NULL) {
172 WARNING("tail plugin: `Regex' missing in `Match' block.");
177 if (cm.type == NULL) {
178 WARNING("tail plugin: `Type' missing in `Match' block.");
184 WARNING("tail plugin: `DSType' missing in `Match' block.");
190 } /* while (status == 0) */
193 // TODO(octo): there's nothing "simple" about the latency stuff …
194 status = tail_match_add_match_simple(
195 tm, cm.regex, cm.excluderegex, cm.flags,
196 (plugin_name != NULL) ? plugin_name : "tail", plugin_instance, cm.type,
197 cm.type_instance, cm.latency, interval);
200 ERROR("tail plugin: tail_match_add_match_simple failed.");
204 sfree(cm.excluderegex);
206 sfree(cm.type_instance);
207 latency_config_free(cm.latency);
210 } /* int ctail_config_add_match */
212 static int ctail_config_add_file(oconfig_item_t *ci) {
214 cdtime_t interval = 0;
215 char *plugin_name = NULL;
216 char *plugin_instance = NULL;
219 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
220 WARNING("tail plugin: `File' needs exactly one string argument.");
224 tm = tail_match_create(ci->values[0].value.string);
226 ERROR("tail plugin: tail_match_create (%s) failed.",
227 ci->values[0].value.string);
231 for (int i = 0; i < ci->children_num; i++) {
232 oconfig_item_t *option = ci->children + i;
235 if (strcasecmp("Plugin", option->key) == 0)
236 status = cf_util_get_string(option, &plugin_name);
237 else if (strcasecmp("Instance", option->key) == 0)
238 status = cf_util_get_string(option, &plugin_instance);
239 else if (strcasecmp("Interval", option->key) == 0)
240 cf_util_get_cdtime(option, &interval);
241 else if (strcasecmp("Match", option->key) == 0) {
242 status = ctail_config_add_match(tm, plugin_name, plugin_instance, option,
246 /* Be mild with failed matches.. */
254 } /* for (i = 0; i < ci->children_num; i++) */
257 sfree(plugin_instance);
259 if (num_matches == 0) {
260 ERROR("tail plugin: No (valid) matches found for file `%s'.",
261 ci->values[0].value.string);
262 tail_match_destroy(tm);
265 cu_tail_match_t **temp;
267 temp = realloc(tail_match_list,
268 sizeof(cu_tail_match_t *) * (tail_match_list_num + 1));
270 ERROR("tail plugin: realloc failed.");
271 tail_match_destroy(tm);
275 tail_match_list = temp;
276 tail_match_list[tail_match_list_num] = tm;
277 tail_match_list_intervals[tail_match_list_num] = interval;
278 tail_match_list_num++;
282 } /* int ctail_config_add_file */
284 static int ctail_config(oconfig_item_t *ci) {
285 for (int i = 0; i < ci->children_num; i++) {
286 oconfig_item_t *option = ci->children + i;
288 if (strcasecmp("File", option->key) == 0)
289 ctail_config_add_file(option);
291 WARNING("tail plugin: Option `%s' not allowed here.", option->key);
293 } /* for (i = 0; i < ci->children_num; i++) */
296 } /* int ctail_config */
298 static int ctail_read(user_data_t *ud) {
301 status = tail_match_read((cu_tail_match_t *)ud->data);
303 ERROR("tail plugin: tail_match_read failed.");
308 } /* int ctail_read */
310 static int ctail_init(void) {
313 if (tail_match_list_num == 0) {
314 WARNING("tail plugin: File list is empty. Returning an error.");
318 for (size_t i = 0; i < tail_match_list_num; i++) {
319 snprintf(str, sizeof(str), "tail-%zu", i);
321 plugin_register_complex_read(NULL, str, ctail_read,
322 tail_match_list_intervals[i],
324 .data = tail_match_list[i],
329 } /* int ctail_init */
331 static int ctail_shutdown(void) {
332 for (size_t i = 0; i < tail_match_list_num; i++) {
333 tail_match_destroy(tail_match_list[i]);
334 tail_match_list[i] = NULL;
336 sfree(tail_match_list);
337 tail_match_list_num = 0;
340 } /* int ctail_shutdown */
342 void module_register(void) {
343 plugin_register_complex_config("tail", ctail_config);
344 plugin_register_init("tail", ctail_init);
345 plugin_register_shutdown("tail", ctail_shutdown);
346 } /* void module_register */