1 /**
2 * collectd - src/target_set.c
3 * Copyright (C) 2008 Florian Forster
4 *
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.
8 *
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.
13 *
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
17 *
18 * Authors:
19 * Florian Forster <octo at verplant.org>
20 **/
22 /*
23 * First tell the compiler to stick to the C99 and POSIX standards as close as
24 * possible.
25 */
26 #ifndef __STRICT_ANSI__ /* {{{ */
27 # define __STRICT_ANSI__
28 #endif
30 #ifndef _ISOC99_SOURCE
31 # define _ISOC99_SOURCE
32 #endif
34 #ifdef _POSIX_C_SOURCE
35 # undef _POSIX_C_SOURCE
36 #endif
37 #define _POSIX_C_SOURCE 200112L
39 #if 0
40 /* Single UNIX needed for strdup. */
41 #ifdef _XOPEN_SOURCE
42 # undef _XOPEN_SOURCE
43 #endif
44 #define _XOPEN_SOURCE 500
45 #endif
47 #ifndef _REENTRANT
48 # define _REENTRANT
49 #endif
51 #ifndef _THREAD_SAFE
52 # define _THREAD_SAFE
53 #endif
55 #ifdef _GNU_SOURCE
56 # undef _GNU_SOURCE
57 #endif
58 /* }}} */
60 #include "collectd.h"
61 #include "common.h"
62 #include "filter_chain.h"
64 struct ts_data_s
65 {
66 char *host;
67 char *plugin;
68 char *plugin_instance;
69 char *type;
70 char *type_instance;
71 };
72 typedef struct ts_data_s ts_data_t;
74 static char *ts_strdup (const char *orig) /* {{{ */
75 {
76 size_t sz;
77 char *dest;
79 if (orig == NULL)
80 return (NULL);
82 sz = strlen (orig) + 1;
83 dest = (char *) malloc (sz);
84 if (dest == NULL)
85 return (NULL);
87 memcpy (dest, orig, sz);
89 return (dest);
90 } /* }}} char *ts_strdup */
92 static int ts_config_add_string (char **dest, /* {{{ */
93 const oconfig_item_t *ci)
94 {
95 char *temp;
97 if (dest == NULL)
98 return (-EINVAL);
100 if ((ci->values_num != 1)
101 || (ci->values[0].type != OCONFIG_TYPE_STRING))
102 {
103 ERROR ("Target `set': The `%s' option requires exactly one string "
104 "argument.", ci->key);
105 return (-1);
106 }
108 temp = ts_strdup (ci->values[0].value.string);
109 if (temp == NULL)
110 {
111 ERROR ("ts_config_add_string: ts_strdup failed.");
112 return (-1);
113 }
115 free (*dest);
116 *dest = temp;
118 return (0);
119 } /* }}} int ts_config_add_string */
121 static int ts_destroy (void **user_data) /* {{{ */
122 {
123 ts_data_t *data;
125 if (user_data == NULL)
126 return (-EINVAL);
128 data = *user_data;
129 if (data == NULL)
130 return (0);
132 free (data->host);
133 free (data->plugin);
134 free (data->plugin_instance);
135 free (data->type);
136 free (data->type_instance);
137 free (data);
139 return (0);
140 } /* }}} int ts_destroy */
142 static int ts_create (const oconfig_item_t *ci, void **user_data) /* {{{ */
143 {
144 ts_data_t *data;
145 int status;
146 int i;
148 data = (ts_data_t *) malloc (sizeof (*data));
149 if (data == NULL)
150 {
151 ERROR ("ts_create: malloc failed.");
152 return (-ENOMEM);
153 }
154 memset (data, 0, sizeof (*data));
156 data->host = NULL;
157 data->plugin = NULL;
158 data->plugin_instance = NULL;
159 data->type = NULL;
160 data->type_instance = NULL;
162 status = 0;
163 for (i = 0; i < ci->children_num; i++)
164 {
165 oconfig_item_t *child = ci->children + i;
167 if ((strcasecmp ("Host", child->key) == 0)
168 || (strcasecmp ("Hostname", child->key) == 0))
169 status = ts_config_add_string (&data->host, child);
170 else if (strcasecmp ("Plugin", child->key) == 0)
171 status = ts_config_add_string (&data->plugin, child);
172 else if (strcasecmp ("PluginInstance", child->key) == 0)
173 status = ts_config_add_string (&data->plugin_instance, child);
174 else if (strcasecmp ("Type", child->key) == 0)
175 status = ts_config_add_string (&data->type, child);
176 else if (strcasecmp ("TypeInstance", child->key) == 0)
177 status = ts_config_add_string (&data->type_instance, child);
178 else
179 {
180 ERROR ("Target `set': The `%s' configuration option is not understood "
181 "and will be ignored.", child->key);
182 status = 0;
183 }
185 if (status != 0)
186 break;
187 }
189 /* Additional sanity-checking */
190 while (status == 0)
191 {
192 if ((data->host == NULL)
193 && (data->plugin == NULL)
194 && (data->plugin_instance == NULL)
195 && (data->type == NULL)
196 && (data->type_instance == NULL))
197 {
198 ERROR ("Target `set': You need to set at lease one of `Host', "
199 "`Plugin', `PluginInstance', `Type', or `TypeInstance'.");
200 status = -1;
201 }
203 break;
204 }
206 if (status != 0)
207 {
208 ts_destroy ((void *) &data);
209 return (status);
210 }
212 *user_data = data;
213 return (0);
214 } /* }}} int ts_create */
216 static int ts_invoke (const data_set_t *ds, value_list_t *vl, /* {{{ */
217 notification_meta_t **meta, void **user_data)
218 {
219 ts_data_t *data;
221 if ((ds == NULL) || (vl == NULL) || (user_data == NULL))
222 return (-EINVAL);
224 data = *user_data;
225 if (data == NULL)
226 {
227 ERROR ("Target `set': Invoke: `data' is NULL.");
228 return (-EINVAL);
229 }
231 #define SET_FIELD(f) if (data->f != NULL) { sstrncpy (vl->f, data->f, sizeof (vl->f)); }
232 SET_FIELD (host);
233 SET_FIELD (plugin);
234 SET_FIELD (plugin_instance);
235 SET_FIELD (type);
236 SET_FIELD (type_instance);
238 return (0);
239 } /* }}} int ts_invoke */
241 void module_register (void)
242 {
243 target_proc_t tproc;
245 memset (&tproc, 0, sizeof (tproc));
246 tproc.create = ts_create;
247 tproc.destroy = ts_destroy;
248 tproc.invoke = ts_invoke;
249 fc_register_target ("set", tproc);
250 } /* module_register */
252 /* vim: set sw=2 sts=2 tw=78 et fdm=marker : */