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, int may_be_empty)
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 if ((!may_be_empty) && (ci->values[0].value.string[0] == 0))
109 {
110 ERROR ("Target `set': The `%s' option does not accept empty strings.",
111 ci->key);
112 return (-1);
113 }
115 temp = ts_strdup (ci->values[0].value.string);
116 if (temp == NULL)
117 {
118 ERROR ("ts_config_add_string: ts_strdup failed.");
119 return (-1);
120 }
122 free (*dest);
123 *dest = temp;
125 return (0);
126 } /* }}} int ts_config_add_string */
128 static int ts_destroy (void **user_data) /* {{{ */
129 {
130 ts_data_t *data;
132 if (user_data == NULL)
133 return (-EINVAL);
135 data = *user_data;
136 if (data == NULL)
137 return (0);
139 free (data->host);
140 free (data->plugin);
141 free (data->plugin_instance);
142 /* free (data->type); */
143 free (data->type_instance);
144 free (data);
146 return (0);
147 } /* }}} int ts_destroy */
149 static int ts_create (const oconfig_item_t *ci, void **user_data) /* {{{ */
150 {
151 ts_data_t *data;
152 int status;
153 int i;
155 data = (ts_data_t *) malloc (sizeof (*data));
156 if (data == NULL)
157 {
158 ERROR ("ts_create: malloc failed.");
159 return (-ENOMEM);
160 }
161 memset (data, 0, sizeof (*data));
163 data->host = NULL;
164 data->plugin = NULL;
165 data->plugin_instance = NULL;
166 /* data->type = NULL; */
167 data->type_instance = NULL;
169 status = 0;
170 for (i = 0; i < ci->children_num; i++)
171 {
172 oconfig_item_t *child = ci->children + i;
174 if ((strcasecmp ("Host", child->key) == 0)
175 || (strcasecmp ("Hostname", child->key) == 0))
176 status = ts_config_add_string (&data->host, child,
177 /* may be empty = */ 0);
178 else if (strcasecmp ("Plugin", child->key) == 0)
179 status = ts_config_add_string (&data->plugin, child,
180 /* may be empty = */ 0);
181 else if (strcasecmp ("PluginInstance", child->key) == 0)
182 status = ts_config_add_string (&data->plugin_instance, child,
183 /* may be empty = */ 1);
184 #if 0
185 else if (strcasecmp ("Type", child->key) == 0)
186 status = ts_config_add_string (&data->type, child,
187 /* may be empty = */ 0);
188 #endif
189 else if (strcasecmp ("TypeInstance", child->key) == 0)
190 status = ts_config_add_string (&data->type_instance, child,
191 /* may be empty = */ 1);
192 else
193 {
194 ERROR ("Target `set': The `%s' configuration option is not understood "
195 "and will be ignored.", child->key);
196 status = 0;
197 }
199 if (status != 0)
200 break;
201 }
203 /* Additional sanity-checking */
204 while (status == 0)
205 {
206 if ((data->host == NULL)
207 && (data->plugin == NULL)
208 && (data->plugin_instance == NULL)
209 /* && (data->type == NULL) */
210 && (data->type_instance == NULL))
211 {
212 ERROR ("Target `set': You need to set at lease one of `Host', "
213 "`Plugin', `PluginInstance', `Type', or `TypeInstance'.");
214 status = -1;
215 }
217 break;
218 }
220 if (status != 0)
221 {
222 ts_destroy ((void *) &data);
223 return (status);
224 }
226 *user_data = data;
227 return (0);
228 } /* }}} int ts_create */
230 static int ts_invoke (const data_set_t *ds, value_list_t *vl, /* {{{ */
231 notification_meta_t **meta, void **user_data)
232 {
233 ts_data_t *data;
235 if ((ds == NULL) || (vl == NULL) || (user_data == NULL))
236 return (-EINVAL);
238 data = *user_data;
239 if (data == NULL)
240 {
241 ERROR ("Target `set': Invoke: `data' is NULL.");
242 return (-EINVAL);
243 }
245 #define SET_FIELD(f) if (data->f != NULL) { sstrncpy (vl->f, data->f, sizeof (vl->f)); }
246 SET_FIELD (host);
247 SET_FIELD (plugin);
248 SET_FIELD (plugin_instance);
249 /* SET_FIELD (type); */
250 SET_FIELD (type_instance);
252 return (FC_TARGET_CONTINUE);
253 } /* }}} int ts_invoke */
255 void module_register (void)
256 {
257 target_proc_t tproc;
259 memset (&tproc, 0, sizeof (tproc));
260 tproc.create = ts_create;
261 tproc.destroy = ts_destroy;
262 tproc.invoke = ts_invoke;
263 fc_register_target ("set", tproc);
264 } /* module_register */
266 /* vim: set sw=2 sts=2 tw=78 et fdm=marker : */