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* collectd - src/tail.c
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* Copyright (C) 2008 Florian octo Forster
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; only version 2 of the License is applicable.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* Florian octo Forster <octo at verplant.org>
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#include "utils_tail_match.h"
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* <File "/var/log/exim4/mainlog">
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* Regex "S=([1-9][0-9]*)"
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struct ctail_config_match_s
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typedef struct ctail_config_match_s ctail_config_match_t;
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cu_tail_match_t **tail_match_list = NULL;
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size_t tail_match_list_num = 0;
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static int ctail_config_add_string (const char *name, char **dest, oconfig_item_t *ci)
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if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
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WARNING ("tail plugin: `%s' needs exactly one string argument.", name);
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*dest = strdup (ci->values[0].value.string);
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} /* int ctail_config_add_string */
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static int ctail_config_add_match_dstype (ctail_config_match_t *cm,
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if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
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WARNING ("tail plugin: `DSType' needs exactly one string argument.");
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if (strncasecmp ("Gauge", ci->values[0].value.string, strlen ("Gauge")) == 0)
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cm->flags = UTILS_MATCH_DS_TYPE_GAUGE;
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if (strcasecmp ("GaugeAverage", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_GAUGE_AVERAGE;
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else if (strcasecmp ("GaugeMin", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_GAUGE_MIN;
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else if (strcasecmp ("GaugeMax", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_GAUGE_MAX;
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else if (strcasecmp ("GaugeLast", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_GAUGE_LAST;
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else if (strncasecmp ("Counter", ci->values[0].value.string, strlen ("Counter")) == 0)
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cm->flags = UTILS_MATCH_DS_TYPE_COUNTER;
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if (strcasecmp ("CounterSet", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_COUNTER_SET;
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else if (strcasecmp ("CounterAdd", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_COUNTER_ADD;
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else if (strcasecmp ("CounterInc", ci->values[0].value.string) == 0)
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cm->flags |= UTILS_MATCH_CF_COUNTER_INC;
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WARNING ("tail plugin: `%s' is not a valid argument to `DSType'.",
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ci->values[0].value.string);
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} /* int ctail_config_add_match_dstype */
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static int ctail_config_add_match (cu_tail_match_t *tm,
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const char *plugin_instance, oconfig_item_t *ci)
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ctail_config_match_t cm;
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memset (&cm, '\0', sizeof (cm));
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if (ci->values_num != 0)
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WARNING ("tail plugin: Ignoring arguments for the `Match' block.");
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for (i = 0; i < ci->children_num; i++)
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oconfig_item_t *option = ci->children + i;
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if (strcasecmp ("Regex", option->key) == 0)
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status = ctail_config_add_string ("Regex", &cm.regex, option);
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else if (strcasecmp ("DSType", option->key) == 0)
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status = ctail_config_add_match_dstype (&cm, option);
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else if (strcasecmp ("Type", option->key) == 0)
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status = ctail_config_add_string ("Type", &cm.type, option);
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else if (strcasecmp ("Instance", option->key) == 0)
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status = ctail_config_add_string ("Instance", &cm.type_instance, option);
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WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
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} /* for (i = 0; i < ci->children_num; i++) */
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if (cm.regex == NULL)
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WARNING ("tail plugin: `Regex' missing in `Match' block.");
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WARNING ("tail plugin: `Type' missing in `Match' block.");
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WARNING ("tail plugin: `DSType' missing in `Match' block.");
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} /* while (status == 0) */
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status = tail_match_add_match_simple (tm, cm.regex, cm.flags,
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"tail", plugin_instance, cm.type, cm.type_instance);
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ERROR ("tail plugin: tail_match_add_match_simple failed.");
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sfree (cm.type_instance);
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} /* int ctail_config_add_match */
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static int ctail_config_add_file (oconfig_item_t *ci)
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char *plugin_instance = NULL;
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if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
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WARNING ("tail plugin: `File' needs exactly one string argument.");
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tm = tail_match_create (ci->values[0].value.string);
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ERROR ("tail plugin: tail_match_create (%s) failed.",
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ci->values[0].value.string);
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for (i = 0; i < ci->children_num; i++)
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oconfig_item_t *option = ci->children + i;
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if (strcasecmp ("Match", option->key) == 0)
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status = ctail_config_add_match (tm, plugin_instance, option);
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/* Be mild with failed matches.. */
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else if (strcasecmp ("Instance", option->key) == 0)
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status = ctail_config_add_string ("Instance", &plugin_instance, option);
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WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
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} /* for (i = 0; i < ci->children_num; i++) */
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if (num_matches == 0)
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ERROR ("tail plugin: No (valid) matches found for file `%s'.",
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ci->values[0].value.string);
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tail_match_destroy (tm);
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cu_tail_match_t **temp;
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temp = (cu_tail_match_t **) realloc (tail_match_list,
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sizeof (cu_tail_match_t *) * (tail_match_list_num + 1));
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ERROR ("tail plugin: realloc failed.");
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tail_match_destroy (tm);
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tail_match_list = temp;
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tail_match_list[tail_match_list_num] = tm;
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tail_match_list_num++;
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} /* int ctail_config_add_file */
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static int ctail_config (oconfig_item_t *ci)
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for (i = 0; i < ci->children_num; i++)
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oconfig_item_t *option = ci->children + i;
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if (strcasecmp ("File", option->key) == 0)
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ctail_config_add_file (option);
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WARNING ("tail plugin: Option `%s' not allowed here.", option->key);
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} /* for (i = 0; i < ci->children_num; i++) */
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} /* int ctail_config */
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static int ctail_init (void)
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if (tail_match_list_num == 0)
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WARNING ("tail plugin: File list is empty. Returning an error.");
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} /* int ctail_init */
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static int ctail_read (void)
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for (i = 0; i < tail_match_list_num; i++)
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status = tail_match_read (tail_match_list[i]);
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ERROR ("tail plugin: tail_match_read[%i] failed.", i);
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} /* int ctail_read */
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static int ctail_shutdown (void)
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for (i = 0; i < tail_match_list_num; i++)
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tail_match_destroy (tail_match_list[i]);
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tail_match_list[i] = NULL;
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sfree (tail_match_list);
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tail_match_list_num = 0;
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} /* int ctail_shutdown */
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void module_register (void)
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plugin_register_complex_config ("tail", ctail_config);
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plugin_register_init ("tail", ctail_init);
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plugin_register_read ("tail", ctail_read);
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plugin_register_shutdown ("tail", ctail_shutdown);
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} /* void module_register */
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/* vim: set sw=2 sts=2 ts=8 : */