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/*
* collectd - src/utils_tail_match.c
* Copyright (C) 2007-2008 C-Ware, Inc.
* Copyright (C) 2008 Florian Forster
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Luke Heberling <lukeh at c-ware.com>
* Florian Forster <octo at verplant.org>
*
* Description:
* Encapsulates useful code to plugins which must parse a log file.
*/
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#include "utils_match.h"
#include "utils_tail.h"
#include "utils_tail_match.h"
struct cu_tail_match_simple_s
{
char plugin[DATA_MAX_NAME_LEN];
char plugin_instance[DATA_MAX_NAME_LEN];
char type[DATA_MAX_NAME_LEN];
char type_instance[DATA_MAX_NAME_LEN];
};
typedef struct cu_tail_match_simple_s cu_tail_match_simple_t;
struct cu_tail_match_match_s
{
cu_match_t *match;
void *user_data;
int (*submit) (cu_match_t *match, void *user_data);
void (*free) (void *user_data);
};
typedef struct cu_tail_match_match_s cu_tail_match_match_t;
struct cu_tail_match_s
{
int flags;
cu_tail_t *tail;
cu_tail_match_match_t *matches;
size_t matches_num;
};
/*
* Private functions
*/
static int simple_submit_match (cu_match_t *match, void *user_data)
{
cu_tail_match_simple_t *data = (cu_tail_match_simple_t *) user_data;
cu_match_value_t *match_value;
value_list_t vl = VALUE_LIST_INIT;
value_t values[1];
match_value = (cu_match_value_t *) match_get_user_data (match);
if (match_value == NULL)
return (-1);
if ((match_value->ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
&& (match_value->values_num == 0))
values[0].gauge = NAN;
else
values[0] = match_value->value;
vl.values = values;
vl.values_len = 1;
sstrncpy (vl.host, hostname_g, sizeof (vl.host));
sstrncpy (vl.plugin, data->plugin, sizeof (vl.plugin));
sstrncpy (vl.plugin_instance, data->plugin_instance,
sizeof (vl.plugin_instance));
sstrncpy (vl.type, data->type, sizeof (vl.type));
sstrncpy (vl.type_instance, data->type_instance,
sizeof (vl.type_instance));
plugin_dispatch_values (&vl);
if (match_value->ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
{
match_value->value.gauge = NAN;
match_value->values_num = 0;
}
return (0);
} /* int simple_submit_match */
static int tail_callback (void *data, char *buf,
int __attribute__((unused)) buflen)
{
cu_tail_match_t *obj = (cu_tail_match_t *) data;
size_t i;
for (i = 0; i < obj->matches_num; i++)
match_apply (obj->matches[i].match, buf);
return (0);
} /* int tail_callback */
/*
* Public functions
*/
cu_tail_match_t *tail_match_create (const char *filename)
{
cu_tail_match_t *obj;
obj = (cu_tail_match_t *) malloc (sizeof (cu_tail_match_t));
if (obj == NULL)
return (NULL);
memset (obj, '\0', sizeof (cu_tail_match_t));
obj->tail = cu_tail_create (filename);
if (obj->tail == NULL)
{
sfree (obj);
return (NULL);
}
return (obj);
} /* cu_tail_match_t *tail_match_create */
void tail_match_destroy (cu_tail_match_t *obj)
{
size_t i;
if (obj == NULL)
return;
if (obj->tail != NULL)
{
cu_tail_destroy (obj->tail);
obj->tail = NULL;
}
for (i = 0; i < obj->matches_num; i++)
{
cu_tail_match_match_t *match = obj->matches + i;
if (match->match != NULL)
{
match_destroy (match->match);
match->match = NULL;
}
if ((match->user_data != NULL)
&& (match->free != NULL))
(*match->free) (match->user_data);
match->user_data = NULL;
}
sfree (obj->matches);
sfree (obj);
} /* void tail_match_destroy */
int tail_match_add_match (cu_tail_match_t *obj, cu_match_t *match,
int (*submit_match) (cu_match_t *match, void *user_data),
void *user_data,
void (*free_user_data) (void *user_data))
{
cu_tail_match_match_t *temp;
temp = (cu_tail_match_match_t *) realloc (obj->matches,
sizeof (cu_tail_match_match_t) * (obj->matches_num + 1));
if (temp == NULL)
return (-1);
obj->matches = temp;
obj->matches_num++;
temp = obj->matches + (obj->matches_num - 1);
temp->match = match;
temp->user_data = user_data;
temp->submit = submit_match;
temp->free = free_user_data;
return (0);
} /* int tail_match_add_match */
int tail_match_add_match_simple (cu_tail_match_t *obj,
const char *regex, const char *excluderegex, int ds_type,
const char *plugin, const char *plugin_instance,
const char *type, const char *type_instance)
{
cu_match_t *match;
cu_tail_match_simple_t *user_data;
int status;
match = match_create_simple (regex, excluderegex, ds_type);
if (match == NULL)
return (-1);
user_data = (cu_tail_match_simple_t *) malloc (sizeof (cu_tail_match_simple_t));
if (user_data == NULL)
{
match_destroy (match);
return (-1);
}
memset (user_data, '\0', sizeof (cu_tail_match_simple_t));
sstrncpy (user_data->plugin, plugin, sizeof (user_data->plugin));
if (plugin_instance != NULL)
sstrncpy (user_data->plugin_instance, plugin_instance,
sizeof (user_data->plugin_instance));
sstrncpy (user_data->type, type, sizeof (user_data->type));
if (type_instance != NULL)
sstrncpy (user_data->type_instance, type_instance,
sizeof (user_data->type_instance));
status = tail_match_add_match (obj, match, simple_submit_match,
user_data, free);
if (status != 0)
{
match_destroy (match);
sfree (user_data);
}
return (status);
} /* int tail_match_add_match_simple */
int tail_match_read (cu_tail_match_t *obj)
{
char buffer[4096];
int status;
size_t i;
status = cu_tail_read (obj->tail, buffer, sizeof (buffer), tail_callback,
(void *) obj);
if (status != 0)
{
ERROR ("tail_match: cu_tail_read failed.");
return (status);
}
for (i = 0; i < obj->matches_num; i++)
{
cu_tail_match_match_t *lt_match = obj->matches + i;
if (lt_match->submit == NULL)
continue;
(*lt_match->submit) (lt_match->match, lt_match->user_data);
}
return (0);
} /* int tail_match_read */
/* vim: set sw=2 sts=2 ts=8 : */
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