1 /*
2 * collectd - src/utils_tail_match.c
3 * Copyright (C) 2007-2008 C-Ware, Inc.
4 * Copyright (C) 2008 Florian Forster
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Author:
20 * Luke Heberling <lukeh at c-ware.com>
21 * Florian Forster <octo at verplant.org>
22 *
23 * Description:
24 * Encapsulates useful code to plugins which must parse a log file.
25 */
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
30 #include "utils_match.h"
31 #include "utils_tail.h"
32 #include "utils_tail_match.h"
34 struct cu_tail_match_simple_s
35 {
36 char plugin[DATA_MAX_NAME_LEN];
37 char plugin_instance[DATA_MAX_NAME_LEN];
38 char type[DATA_MAX_NAME_LEN];
39 char type_instance[DATA_MAX_NAME_LEN];
40 };
41 typedef struct cu_tail_match_simple_s cu_tail_match_simple_t;
43 struct cu_tail_match_match_s
44 {
45 cu_match_t *match;
46 void *user_data;
47 int (*submit) (cu_match_t *match, void *user_data);
48 void (*free) (void *user_data);
49 };
50 typedef struct cu_tail_match_match_s cu_tail_match_match_t;
52 struct cu_tail_match_s
53 {
54 int flags;
55 cu_tail_t *tail;
57 cu_tail_match_match_t *matches;
58 size_t matches_num;
59 };
61 /*
62 * Private functions
63 */
64 static int simple_submit_match (cu_match_t *match, void *user_data)
65 {
66 cu_tail_match_simple_t *data = (cu_tail_match_simple_t *) user_data;
67 cu_match_value_t *match_value;
68 value_list_t vl = VALUE_LIST_INIT;
69 value_t values[1];
71 match_value = (cu_match_value_t *) match_get_user_data (match);
72 if (match_value == NULL)
73 return (-1);
75 if ((match_value->ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
76 && (match_value->values_num == 0))
77 values[0].gauge = NAN;
78 else
79 values[0] = match_value->value;
81 vl.values = values;
82 vl.values_len = 1;
83 vl.time = time (NULL);
84 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
85 sstrncpy (vl.plugin, data->plugin, sizeof (vl.plugin));
86 sstrncpy (vl.plugin_instance, data->plugin_instance,
87 sizeof (vl.plugin_instance));
88 sstrncpy (vl.type_instance, data->type_instance,
89 sizeof (vl.type_instance));
91 plugin_dispatch_values (data->type, &vl);
93 if (match_value->ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
94 {
95 match_value->value.gauge = NAN;
96 match_value->values_num = 0;
97 }
99 return (0);
100 } /* int simple_submit_match */
102 static int tail_callback (void *data, char *buf, int buflen)
103 {
104 cu_tail_match_t *obj = (cu_tail_match_t *) data;
105 int i;
107 for (i = 0; i < obj->matches_num; i++)
108 match_apply (obj->matches[i].match, buf);
110 return (0);
111 } /* int tail_callback */
113 /*
114 * Public functions
115 */
116 cu_tail_match_t *tail_match_create (const char *filename)
117 {
118 cu_tail_match_t *obj;
120 obj = (cu_tail_match_t *) malloc (sizeof (cu_tail_match_t));
121 if (obj == NULL)
122 return (NULL);
123 memset (obj, '\0', sizeof (cu_tail_match_t));
125 obj->tail = cu_tail_create (filename);
126 if (obj->tail == NULL)
127 {
128 sfree (obj);
129 return (NULL);
130 }
132 return (obj);
133 } /* cu_tail_match_t *tail_match_create */
135 void tail_match_destroy (cu_tail_match_t *obj)
136 {
137 int i;
139 if (obj == NULL)
140 return;
142 if (obj->tail != NULL)
143 {
144 cu_tail_destroy (obj->tail);
145 obj->tail = NULL;
146 }
148 for (i = 0; i < obj->matches_num; i++)
149 {
150 cu_tail_match_match_t *match = obj->matches + i;
151 if (match->match != NULL)
152 {
153 match_destroy (match->match);
154 match->match = NULL;
155 }
157 if ((match->user_data != NULL)
158 && (match->free != NULL))
159 (*match->free) (match->user_data);
160 match->user_data = NULL;
161 }
163 sfree (obj->matches);
164 sfree (obj);
165 } /* void tail_match_destroy */
167 int tail_match_add_match (cu_tail_match_t *obj, cu_match_t *match,
168 int (*submit_match) (cu_match_t *match, void *user_data),
169 void *user_data,
170 void (*free_user_data) (void *user_data))
171 {
172 cu_tail_match_match_t *temp;
174 temp = (cu_tail_match_match_t *) realloc (obj->matches,
175 sizeof (cu_tail_match_match_t) * (obj->matches_num + 1));
176 if (temp == NULL)
177 return (-1);
179 obj->matches = temp;
180 obj->matches_num++;
182 temp = obj->matches + (obj->matches_num - 1);
184 temp->match = match;
185 temp->user_data = user_data;
186 temp->submit = submit_match;
187 temp->free = free_user_data;
189 return (0);
190 } /* int tail_match_add_match */
192 int tail_match_add_match_simple (cu_tail_match_t *obj,
193 const char *regex, int ds_type,
194 const char *plugin, const char *plugin_instance,
195 const char *type, const char *type_instance)
196 {
197 cu_match_t *match;
198 cu_tail_match_simple_t *user_data;
199 int status;
201 match = match_create_simple (regex, ds_type);
202 if (match == NULL)
203 return (-1);
205 user_data = (cu_tail_match_simple_t *) malloc (sizeof (cu_tail_match_simple_t));
206 if (user_data == NULL)
207 {
208 match_destroy (match);
209 return (-1);
210 }
211 memset (user_data, '\0', sizeof (cu_tail_match_simple_t));
213 sstrncpy (user_data->plugin, plugin, sizeof (user_data->plugin));
214 if (plugin_instance != NULL)
215 sstrncpy (user_data->plugin_instance, plugin_instance,
216 sizeof (user_data->plugin_instance));
218 sstrncpy (user_data->type, type, sizeof (user_data->type));
219 if (type_instance != NULL)
220 sstrncpy (user_data->type_instance, type_instance,
221 sizeof (user_data->type_instance));
223 status = tail_match_add_match (obj, match, simple_submit_match,
224 user_data, free);
226 if (status != 0)
227 {
228 match_destroy (match);
229 sfree (user_data);
230 }
232 return (status);
233 } /* int tail_match_add_match_simple */
235 int tail_match_read (cu_tail_match_t *obj)
236 {
237 char buffer[4096];
238 int status;
239 int i;
241 status = cu_tail_read (obj->tail, buffer, sizeof (buffer), tail_callback,
242 (void *) obj);
243 if (status != 0)
244 {
245 ERROR ("tail_match: cu_tail_read failed.");
246 return (status);
247 }
249 for (i = 0; i < obj->matches_num; i++)
250 {
251 cu_tail_match_match_t *lt_match = obj->matches + i;
253 if (lt_match->submit == NULL)
254 continue;
256 (*lt_match->submit) (lt_match->match, lt_match->user_data);
257 }
259 return (0);
260 } /* int tail_match_read */
262 /* vim: set sw=2 sts=2 ts=8 : */