2 * collectd - src/tail.c
3 * Copyright (C) 2008 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
25 #include "utils_tail_match.h"
29 * <File "/var/log/exim4/mainlog">
33 * Regex "S=([1-9][0-9]*)"
34 * ExcludeRegex "U=root.*S="
43 struct ctail_config_match_s
52 typedef struct ctail_config_match_s ctail_config_match_t;
54 cu_tail_match_t **tail_match_list = NULL;
55 size_t tail_match_list_num = 0;
56 cdtime_t tail_match_list_intervals[255];
58 static int ctail_config_add_match_dstype (ctail_config_match_t *cm,
61 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
63 WARNING ("tail plugin: `DSType' needs exactly one string argument.");
67 if (strncasecmp ("Gauge", ci->values[0].value.string, strlen ("Gauge")) == 0)
69 cm->flags = UTILS_MATCH_DS_TYPE_GAUGE;
70 if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
71 cm->flags |= UTILS_MATCH_CF_GAUGE_AVERAGE;
72 else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
73 cm->flags |= UTILS_MATCH_CF_GAUGE_MIN;
74 else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
75 cm->flags |= UTILS_MATCH_CF_GAUGE_MAX;
76 else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
77 cm->flags |= UTILS_MATCH_CF_GAUGE_LAST;
78 else if (strcasecmp ("GaugeInc", ci->values[0].value.string) == 0)
79 cm->flags |= UTILS_MATCH_CF_GAUGE_INC;
80 else if (strcasecmp ("GaugeAdd", ci->values[0].value.string) == 0)
81 cm->flags |= UTILS_MATCH_CF_GAUGE_ADD;
85 else if (strncasecmp ("Counter", ci->values[0].value.string, strlen ("Counter")) == 0)
87 cm->flags = UTILS_MATCH_DS_TYPE_COUNTER;
88 if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
89 cm->flags |= UTILS_MATCH_CF_COUNTER_SET;
90 else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
91 cm->flags |= UTILS_MATCH_CF_COUNTER_ADD;
92 else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
93 cm->flags |= UTILS_MATCH_CF_COUNTER_INC;
97 else if (strncasecmp ("Derive", ci->values[0].value.string, strlen ("Derive")) == 0)
99 cm->flags = UTILS_MATCH_DS_TYPE_DERIVE;
100 if (strcasecmp ("DeriveSet", ci->values[0].value.string) == 0)
101 cm->flags |= UTILS_MATCH_CF_DERIVE_SET;
102 else if (strcasecmp ("DeriveAdd", ci->values[0].value.string) == 0)
103 cm->flags |= UTILS_MATCH_CF_DERIVE_ADD;
104 else if (strcasecmp ("DeriveInc", ci->values[0].value.string) == 0)
105 cm->flags |= UTILS_MATCH_CF_DERIVE_INC;
109 else if (strncasecmp ("Absolute", ci->values[0].value.string, strlen ("Absolute")) == 0)
111 cm->flags = UTILS_MATCH_DS_TYPE_ABSOLUTE;
112 if (strcasecmp ("AbsoluteSet", ci->values[0].value.string) == 0)
113 cm->flags |= UTILS_MATCH_CF_ABSOLUTE_SET;
124 WARNING ("tail plugin: `%s' is not a valid argument to `DSType'.",
125 ci->values[0].value.string);
130 } /* int ctail_config_add_match_dstype */
132 static int ctail_config_add_match (cu_tail_match_t *tm,
133 const char *plugin_instance, oconfig_item_t *ci, cdtime_t interval)
135 ctail_config_match_t cm;
139 memset (&cm, '\0', sizeof (cm));
141 if (ci->values_num != 0)
143 WARNING ("tail plugin: Ignoring arguments for the `Match' block.");
147 for (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);
163 WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
169 } /* for (i = 0; i < ci->children_num; i++) */
173 if (cm.regex == NULL)
175 WARNING ("tail plugin: `Regex' missing in `Match' block.");
182 WARNING ("tail plugin: `Type' missing in `Match' block.");
189 WARNING ("tail plugin: `DSType' missing in `Match' block.");
195 } /* while (status == 0) */
199 status = tail_match_add_match_simple (tm, cm.regex, cm.excluderegex,
200 cm.flags, "tail", plugin_instance, cm.type, cm.type_instance, interval);
204 ERROR ("tail plugin: tail_match_add_match_simple failed.");
209 sfree (cm.excluderegex);
211 sfree (cm.type_instance);
214 } /* int ctail_config_add_match */
216 static int ctail_config_add_file (oconfig_item_t *ci)
219 cdtime_t interval = 0;
220 char *plugin_instance = NULL;
225 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
227 WARNING ("tail plugin: `File' needs exactly one string argument.");
231 tm = tail_match_create (ci->values[0].value.string);
234 ERROR ("tail plugin: tail_match_create (%s) failed.",
235 ci->values[0].value.string);
240 for (i = 0; i < ci->children_num; i++)
242 oconfig_item_t *option = ci->children + i;
244 if (strcasecmp ("Instance", option->key) == 0)
245 status = cf_util_get_string (option, &plugin_instance);
246 else if (strcasecmp ("Interval", option->key) == 0)
247 cf_util_get_cdtime (option, &interval);
248 else if (strcasecmp ("Match", option->key) == 0)
250 status = ctail_config_add_match (tm, plugin_instance, option, interval);
253 /* Be mild with failed matches.. */
263 } /* for (i = 0; i < ci->children_num; i++) */
265 if (num_matches == 0)
267 ERROR ("tail plugin: No (valid) matches found for file `%s'.",
268 ci->values[0].value.string);
269 tail_match_destroy (tm);
274 cu_tail_match_t **temp;
276 temp = (cu_tail_match_t **) realloc (tail_match_list,
277 sizeof (cu_tail_match_t *) * (tail_match_list_num + 1));
280 ERROR ("tail plugin: realloc failed.");
281 tail_match_destroy (tm);
285 tail_match_list = temp;
286 tail_match_list[tail_match_list_num] = tm;
287 tail_match_list_intervals[tail_match_list_num] = interval;
288 tail_match_list_num++;
292 } /* int ctail_config_add_file */
294 static int ctail_config (oconfig_item_t *ci)
298 for (i = 0; i < ci->children_num; i++)
300 oconfig_item_t *option = ci->children + i;
302 if (strcasecmp ("File", option->key) == 0)
303 ctail_config_add_file (option);
306 WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
308 } /* for (i = 0; i < ci->children_num; i++) */
311 } /* int ctail_config */
313 static int ctail_read (user_data_t *ud)
317 status = tail_match_read ((cu_tail_match_t *)ud->data);
320 ERROR ("tail plugin: tail_match_read failed.");
325 } /* int ctail_read */
327 static int ctail_init (void)
329 struct timespec cb_interval;
334 if (tail_match_list_num == 0)
336 WARNING ("tail plugin: File list is empty. Returning an error.");
340 for (i = 0; i < tail_match_list_num; i++)
342 ud.data = (void *)tail_match_list[i];
343 ssnprintf(str, sizeof(str), "tail-%zu", i);
344 CDTIME_T_TO_TIMESPEC (tail_match_list_intervals[i], &cb_interval);
345 plugin_register_complex_read (NULL, str, ctail_read, &cb_interval, &ud);
349 } /* int ctail_init */
351 static int ctail_shutdown (void)
355 for (i = 0; i < tail_match_list_num; i++)
357 tail_match_destroy (tail_match_list[i]);
358 tail_match_list[i] = NULL;
360 sfree (tail_match_list);
361 tail_match_list_num = 0;
364 } /* int ctail_shutdown */
366 void module_register (void)
368 plugin_register_complex_config ("tail", ctail_config);
369 plugin_register_init ("tail", ctail_init);
370 plugin_register_shutdown ("tail", ctail_shutdown);
371 } /* void module_register */
373 /* vim: set sw=2 sts=2 ts=8 : */