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 #ifdef _XOPEN_SOURCE
40 # undef _XOPEN_SOURCE
41 #endif
42 #define _XOPEN_SOURCE 600
44 #ifndef _REENTRANT
45 # define _REENTRANT
46 #endif
48 #ifndef _THREAD_SAFE
49 # define _THREAD_SAFE
50 #endif
52 #ifdef _GNU_SOURCE
53 # undef _GNU_SOURCE
54 #endif
55 /* }}} */
57 #include "collectd.h"
58 #include "common.h"
59 #include "filter_chain.h"
61 struct ts_data_s
62 {
63 char *host;
64 char *plugin;
65 char *plugin_instance;
66 /* char *type; */
67 char *type_instance;
68 };
69 typedef struct ts_data_s ts_data_t;
71 static char *ts_strdup (const char *orig) /* {{{ */
72 {
73 size_t sz;
74 char *dest;
76 if (orig == NULL)
77 return (NULL);
79 sz = strlen (orig) + 1;
80 dest = (char *) malloc (sz);
81 if (dest == NULL)
82 return (NULL);
84 memcpy (dest, orig, sz);
86 return (dest);
87 } /* }}} char *ts_strdup */
89 static int ts_config_add_string (char **dest, /* {{{ */
90 const oconfig_item_t *ci, int may_be_empty)
91 {
92 char *temp;
94 if (dest == NULL)
95 return (-EINVAL);
97 if ((ci->values_num != 1)
98 || (ci->values[0].type != OCONFIG_TYPE_STRING))
99 {
100 ERROR ("Target `set': The `%s' option requires exactly one string "
101 "argument.", ci->key);
102 return (-1);
103 }
105 if ((!may_be_empty) && (ci->values[0].value.string[0] == 0))
106 {
107 ERROR ("Target `set': The `%s' option does not accept empty strings.",
108 ci->key);
109 return (-1);
110 }
112 temp = ts_strdup (ci->values[0].value.string);
113 if (temp == NULL)
114 {
115 ERROR ("ts_config_add_string: ts_strdup failed.");
116 return (-1);
117 }
119 free (*dest);
120 *dest = temp;
122 return (0);
123 } /* }}} int ts_config_add_string */
125 static int ts_destroy (void **user_data) /* {{{ */
126 {
127 ts_data_t *data;
129 if (user_data == NULL)
130 return (-EINVAL);
132 data = *user_data;
133 if (data == NULL)
134 return (0);
136 free (data->host);
137 free (data->plugin);
138 free (data->plugin_instance);
139 /* free (data->type); */
140 free (data->type_instance);
141 free (data);
143 return (0);
144 } /* }}} int ts_destroy */
146 static int ts_create (const oconfig_item_t *ci, void **user_data) /* {{{ */
147 {
148 ts_data_t *data;
149 int status;
150 int i;
152 data = (ts_data_t *) malloc (sizeof (*data));
153 if (data == NULL)
154 {
155 ERROR ("ts_create: malloc failed.");
156 return (-ENOMEM);
157 }
158 memset (data, 0, sizeof (*data));
160 data->host = NULL;
161 data->plugin = NULL;
162 data->plugin_instance = NULL;
163 /* data->type = NULL; */
164 data->type_instance = NULL;
166 status = 0;
167 for (i = 0; i < ci->children_num; i++)
168 {
169 oconfig_item_t *child = ci->children + i;
171 if ((strcasecmp ("Host", child->key) == 0)
172 || (strcasecmp ("Hostname", child->key) == 0))
173 status = ts_config_add_string (&data->host, child,
174 /* may be empty = */ 0);
175 else if (strcasecmp ("Plugin", child->key) == 0)
176 status = ts_config_add_string (&data->plugin, child,
177 /* may be empty = */ 0);
178 else if (strcasecmp ("PluginInstance", child->key) == 0)
179 status = ts_config_add_string (&data->plugin_instance, child,
180 /* may be empty = */ 1);
181 #if 0
182 else if (strcasecmp ("Type", child->key) == 0)
183 status = ts_config_add_string (&data->type, child,
184 /* may be empty = */ 0);
185 #endif
186 else if (strcasecmp ("TypeInstance", child->key) == 0)
187 status = ts_config_add_string (&data->type_instance, child,
188 /* may be empty = */ 1);
189 else
190 {
191 ERROR ("Target `set': The `%s' configuration option is not understood "
192 "and will be ignored.", child->key);
193 status = 0;
194 }
196 if (status != 0)
197 break;
198 }
200 /* Additional sanity-checking */
201 while (status == 0)
202 {
203 if ((data->host == NULL)
204 && (data->plugin == NULL)
205 && (data->plugin_instance == NULL)
206 /* && (data->type == NULL) */
207 && (data->type_instance == NULL))
208 {
209 ERROR ("Target `set': You need to set at lease one of `Host', "
210 "`Plugin', `PluginInstance', `Type', or `TypeInstance'.");
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 #define SET_FIELD(f) if (data->f != NULL) { sstrncpy (vl->f, data->f, sizeof (vl->f)); }
243 SET_FIELD (host);
244 SET_FIELD (plugin);
245 SET_FIELD (plugin_instance);
246 /* SET_FIELD (type); */
247 SET_FIELD (type_instance);
249 return (FC_TARGET_CONTINUE);
250 } /* }}} int ts_invoke */
252 void module_register (void)
253 {
254 target_proc_t tproc;
256 memset (&tproc, 0, sizeof (tproc));
257 tproc.create = ts_create;
258 tproc.destroy = ts_destroy;
259 tproc.invoke = ts_invoke;
260 fc_register_target ("set", tproc);
261 } /* module_register */
263 /* vim: set sw=2 sts=2 tw=78 et fdm=marker : */