1 /**
2 * collectd - src/target_set.c
3 * Copyright (C) 2008 Florian Forster
4 *
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:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
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.
22 *
23 * Authors:
24 * Florian Forster <octo at collectd.org>
25 **/
27 #include "collectd.h"
28 #include "common.h"
29 #include "filter_chain.h"
31 struct ts_data_s
32 {
33 char *host;
34 char *plugin;
35 char *plugin_instance;
36 /* char *type; */
37 char *type_instance;
38 meta_data_t *meta;
39 };
40 typedef struct ts_data_s ts_data_t;
42 int ts_util_get_key_and_string_wo_strdup (const oconfig_item_t *ci, char **ret_key, char **ret_string) /* {{{ */
43 {
44 if ((ci->values_num != 2)
45 || (ci->values[0].type != OCONFIG_TYPE_STRING)
46 || (ci->values[1].type != OCONFIG_TYPE_STRING))
47 {
48 ERROR ("ts_util_get_key_and_string_wo_strdup: The %s option requires "
49 "exactly two string argument.", ci->key);
50 return (-1);
51 }
53 *ret_key = ci->values[0].value.string;
54 *ret_string = ci->values[1].value.string;
56 return (0);
57 } /* }}} int ts_util_get_key_and_string_wo_strdup */
59 static int ts_config_add_string (char **dest, /* {{{ */
60 const oconfig_item_t *ci, int may_be_empty)
61 {
62 char *tmp = NULL;
63 int status;
65 status = cf_util_get_string (ci, &tmp);
66 if (status != 0)
67 return (status);
69 if (!may_be_empty && (strlen (tmp) == 0))
70 {
71 ERROR ("Target `set': The `%s' option does not accept empty strings.",
72 ci->key);
73 sfree (tmp);
74 return (-1);
75 }
77 *dest = tmp;
78 return (0);
79 } /* }}} int ts_config_add_string */
81 static int ts_config_add_meta (meta_data_t **dest, /* {{{ */
82 const oconfig_item_t *ci, int may_be_empty)
83 {
84 char *key = NULL;
85 char *string = NULL;
86 int status;
88 status = ts_util_get_key_and_string_wo_strdup (ci, &key, &string);
89 if (status != 0)
90 return (status);
92 if (strlen (key) == 0)
93 {
94 ERROR ("Target `set': The `%s' option does not accept empty string as first argument.",
95 ci->key);
96 return (-1);
97 }
99 if (!may_be_empty && (strlen (string) == 0))
100 {
101 ERROR ("Target `set': The `%s' option does not accept empty string as second argument.",
102 ci->key);
103 return (-1);
104 }
106 if ((*dest) == NULL)
107 {
108 // Create a new meta_data_t
109 if ((*dest = meta_data_create()) == NULL)
110 {
111 ERROR ("Target `set': failed to create a meta data for `%s'.", ci->key);
112 return (-1);
113 }
114 }
116 return (meta_data_add_string (*dest, key, string));
117 } /* }}} int ts_config_add_meta */
119 static int ts_destroy (void **user_data) /* {{{ */
120 {
121 ts_data_t *data;
123 if (user_data == NULL)
124 return (-EINVAL);
126 data = *user_data;
127 if (data == NULL)
128 return (0);
130 free (data->host);
131 free (data->plugin);
132 free (data->plugin_instance);
133 /* free (data->type); */
134 free (data->type_instance);
135 meta_data_destroy(data->meta);
136 free (data);
138 return (0);
139 } /* }}} int ts_destroy */
141 static int ts_create (const oconfig_item_t *ci, void **user_data) /* {{{ */
142 {
143 ts_data_t *data;
144 int status;
145 int i;
147 data = calloc (1, sizeof (*data));
148 if (data == NULL)
149 {
150 ERROR ("ts_create: calloc failed.");
151 return (-ENOMEM);
152 }
154 data->host = NULL;
155 data->plugin = NULL;
156 data->plugin_instance = NULL;
157 /* data->type = NULL; */
158 data->type_instance = NULL;
159 data->meta = NULL;
161 status = 0;
162 for (i = 0; i < ci->children_num; i++)
163 {
164 oconfig_item_t *child = ci->children + i;
166 if ((strcasecmp ("Host", child->key) == 0)
167 || (strcasecmp ("Hostname", child->key) == 0))
168 status = ts_config_add_string (&data->host, child,
169 /* may be empty = */ 0);
170 else if (strcasecmp ("Plugin", child->key) == 0)
171 status = ts_config_add_string (&data->plugin, child,
172 /* may be empty = */ 0);
173 else if (strcasecmp ("PluginInstance", child->key) == 0)
174 status = ts_config_add_string (&data->plugin_instance, child,
175 /* may be empty = */ 1);
176 #if 0
177 else if (strcasecmp ("Type", child->key) == 0)
178 status = ts_config_add_string (&data->type, child,
179 /* may be empty = */ 0);
180 #endif
181 else if (strcasecmp ("TypeInstance", child->key) == 0)
182 status = ts_config_add_string (&data->type_instance, child,
183 /* may be empty = */ 1);
184 else if (strcasecmp ("MetaDataSet", child->key) == 0)
185 status = ts_config_add_meta (&data->meta, child,
186 /* may be empty = */ 1);
187 else
188 {
189 ERROR ("Target `set': The `%s' configuration option is not understood "
190 "and will be ignored.", child->key);
191 status = 0;
192 }
194 if (status != 0)
195 break;
196 }
198 /* Additional sanity-checking */
199 while (status == 0)
200 {
201 if ((data->host == NULL)
202 && (data->plugin == NULL)
203 && (data->plugin_instance == NULL)
204 /* && (data->type == NULL) */
205 && (data->type_instance == NULL)
206 && (data->meta == NULL))
207 {
208 ERROR ("Target `set': You need to set at least one of `Host', "
209 "`Plugin', `PluginInstance', `TypeInstance', "
210 "`MetaDataSet' or `MetaDataEval'.");
211 status = -1;
212 }
214 break;
215 }
217 if (status != 0)
218 {
219 ts_destroy ((void *) &data);
220 return (status);
221 }
223 *user_data = data;
224 return (0);
225 } /* }}} int ts_create */
227 static int ts_invoke (const data_set_t *ds, value_list_t *vl, /* {{{ */
228 notification_meta_t __attribute__((unused)) **meta, void **user_data)
229 {
230 ts_data_t *data;
232 if ((ds == NULL) || (vl == NULL) || (user_data == NULL))
233 return (-EINVAL);
235 data = *user_data;
236 if (data == NULL)
237 {
238 ERROR ("Target `set': Invoke: `data' is NULL.");
239 return (-EINVAL);
240 }
242 if (data->meta != NULL)
243 {
244 meta_data_clone_merge(&(vl->meta), data->meta);
245 }
247 #define SET_FIELD(f) if (data->f != NULL) { sstrncpy (vl->f, data->f, sizeof (vl->f)); }
248 SET_FIELD (host);
249 SET_FIELD (plugin);
250 SET_FIELD (plugin_instance);
251 /* SET_FIELD (type); */
252 SET_FIELD (type_instance);
254 return (FC_TARGET_CONTINUE);
255 } /* }}} int ts_invoke */
257 void module_register (void)
258 {
259 target_proc_t tproc;
261 memset (&tproc, 0, sizeof (tproc));
262 tproc.create = ts_create;
263 tproc.destroy = ts_destroy;
264 tproc.invoke = ts_invoke;
265 fc_register_target ("set", tproc);
266 } /* module_register */
268 /* vim: set sw=2 sts=2 tw=78 et fdm=marker : */