2 * collectd - src/configfile.c
3 * Copyright (C) 2005,2006 Florian octo Forster
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; either version 2 of the License, or (at your
8 * option) any later version.
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.
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
20 * Florian octo Forster <octo at verplant.org>
25 #include "liboconfig/oconfig.h"
29 #include "configfile.h"
31 #define ESCAPE_NULL(str) ((str) == NULL ? "(null)" : (str))
36 typedef struct cf_callback
39 int (*callback) (const char *, const char *);
42 struct cf_callback *next;
45 typedef struct cf_value_map_s
48 int (*func) (const oconfig_item_t *);
51 typedef struct cf_global_option_s
59 * Prototypes of callback functions
61 static int dispatch_value_plugindir (const oconfig_item_t *ci);
62 static int dispatch_value_loadplugin (const oconfig_item_t *ci);
67 static cf_callback_t *first_callback = NULL;
69 static cf_value_map_t cf_value_map[] =
71 {"PluginDir", dispatch_value_plugindir},
72 {"LoadPlugin", dispatch_value_loadplugin}
74 static int cf_value_map_num = STATIC_ARRAY_LEN (cf_value_map);
76 static cf_global_option_t cf_global_options[] =
78 {"BaseDir", NULL, PKGLOCALSTATEDIR},
79 {"PIDFile", NULL, PIDFILE},
80 {"Hostname", NULL, NULL},
81 {"Interval", NULL, "10"},
82 {"ReadThreads", NULL, "5"},
83 {"TypesDB", NULL, PLUGINDIR"/types.db"} /* FIXME: Configure path */
85 static int cf_global_options_num = STATIC_ARRAY_LEN (cf_global_options);
88 * Functions to handle register/unregister, search, and other plugin related
91 static cf_callback_t *cf_search (const char *type)
98 for (cf_cb = first_callback; cf_cb != NULL; cf_cb = cf_cb->next)
99 if (strcasecmp (cf_cb->type, type) == 0)
105 static int cf_dispatch (const char *type, const char *orig_key,
106 const char *orig_value)
108 cf_callback_t *cf_cb;
114 DEBUG ("type = %s, key = %s, value = %s",
116 ESCAPE_NULL(orig_key),
117 ESCAPE_NULL(orig_value));
119 if ((cf_cb = cf_search (type)) == NULL)
121 WARNING ("Plugin `%s' did not register a callback.", type);
125 if ((key = strdup (orig_key)) == NULL)
127 if ((value = strdup (orig_value)) == NULL)
135 for (i = 0; i < cf_cb->keys_num; i++)
137 if (strcasecmp (cf_cb->keys[i], key) == 0)
139 ret = (*cf_cb->callback) (key, value);
144 if (i >= cf_cb->keys_num)
145 WARNING ("Plugin `%s' did not register for value `%s'.", type, key);
150 DEBUG ("return (%i)", ret);
153 } /* int cf_dispatch */
155 static int dispatch_global_option (const oconfig_item_t *ci)
157 if (ci->values_num != 1)
159 if (ci->values[0].type == OCONFIG_TYPE_STRING)
160 return (global_option_set (ci->key, ci->values[0].value.string));
161 else if (ci->values[0].type == OCONFIG_TYPE_NUMBER)
164 snprintf (tmp, sizeof (tmp), "%lf", ci->values[0].value.number);
166 return (global_option_set (ci->key, tmp));
170 } /* int dispatch_global_option */
172 static int dispatch_value_plugindir (const oconfig_item_t *ci)
174 assert (strcasecmp (ci->key, "PluginDir") == 0);
176 if (ci->values_num != 1)
178 if (ci->values[0].type != OCONFIG_TYPE_STRING)
181 plugin_set_dir (ci->values[0].value.string);
185 static int dispatch_value_loadplugin (const oconfig_item_t *ci)
187 assert (strcasecmp (ci->key, "LoadPlugin") == 0);
189 if (ci->values_num != 1)
191 if (ci->values[0].type != OCONFIG_TYPE_STRING)
194 return (plugin_load (ci->values[0].value.string));
195 } /* int dispatch_value_loadplugin */
197 static int dispatch_value_plugin (const char *plugin, oconfig_item_t *ci)
205 buffer_free = sizeof (buffer);
207 for (i = 0; i < ci->values_num; i++)
211 if (ci->values[i].type == OCONFIG_TYPE_STRING)
212 status = snprintf (buffer_ptr, buffer_free, " %s",
213 ci->values[i].value.string);
214 else if (ci->values[i].type == OCONFIG_TYPE_NUMBER)
215 status = snprintf (buffer_ptr, buffer_free, " %lf",
216 ci->values[i].value.number);
217 else if (ci->values[i].type == OCONFIG_TYPE_BOOLEAN)
218 status = snprintf (buffer_ptr, buffer_free, " %s",
219 ci->values[i].value.boolean
222 if ((status < 0) || (status >= buffer_free))
224 buffer_free -= status;
225 buffer_ptr += status;
227 /* skip the initial space */
228 buffer_ptr = buffer + 1;
230 return (cf_dispatch (plugin, ci->key, buffer_ptr));
231 } /* int plugin_conf_dispatch */
233 static int dispatch_value (const oconfig_item_t *ci)
238 for (i = 0; i < cf_value_map_num; i++)
239 if (strcasecmp (cf_value_map[i].key, ci->key) == 0)
241 ret = cf_value_map[i].func (ci);
245 for (i = 0; i < cf_global_options_num; i++)
246 if (strcasecmp (cf_global_options[i].key, ci->key) == 0)
248 ret = dispatch_global_option (ci);
253 } /* int dispatch_value */
255 static int dispatch_block_plugin (oconfig_item_t *ci)
260 if (strcasecmp (ci->key, "Plugin") != 0)
262 if (ci->values_num != 1)
264 if (ci->values[0].type != OCONFIG_TYPE_STRING)
267 name = ci->values[0].value.string;
269 for (i = 0; i < ci->children_num; i++)
271 if (ci->children[i].children == NULL)
272 dispatch_value_plugin (name, ci->children + i);
274 {DEBUG ("No nested config blocks allow for plugins. Yet.");}
281 static int dispatch_block (oconfig_item_t *ci)
283 if (strcasecmp (ci->key, "Plugin") == 0)
284 return (dispatch_block_plugin (ci));
292 int global_option_set (const char *option, const char *value)
296 DEBUG ("option = %s; value = %s;", option, value);
298 for (i = 0; i < cf_global_options_num; i++)
299 if (strcasecmp (cf_global_options[i].key, option) == 0)
302 if (i >= cf_global_options_num)
305 sfree (cf_global_options[i].value);
308 cf_global_options[i].value = strdup (value);
310 cf_global_options[i].value = NULL;
315 const char *global_option_get (const char *option)
319 for (i = 0; i < cf_global_options_num; i++)
320 if (strcasecmp (cf_global_options[i].key, option) == 0)
323 if (i >= cf_global_options_num)
326 return ((cf_global_options[i].value != NULL)
327 ? cf_global_options[i].value
328 : cf_global_options[i].def);
329 } /* char *global_option_get */
331 void cf_unregister (const char *type)
333 cf_callback_t *this, *prev;
335 for (prev = NULL, this = first_callback;
337 prev = this, this = this->next)
338 if (strcasecmp (this->type, type) == 0)
341 first_callback = this->next;
343 prev->next = this->next;
348 } /* void cf_unregister */
350 void cf_register (const char *type,
351 int (*callback) (const char *, const char *),
352 const char **keys, int keys_num)
354 cf_callback_t *cf_cb;
356 /* Remove this module from the list, if it already exists */
357 cf_unregister (type);
359 /* This pointer will be free'd in `cf_unregister' */
360 if ((cf_cb = (cf_callback_t *) malloc (sizeof (cf_callback_t))) == NULL)
364 cf_cb->callback = callback;
366 cf_cb->keys_num = keys_num;
368 cf_cb->next = first_callback;
369 first_callback = cf_cb;
370 } /* void cf_register */
372 int cf_read (char *filename)
374 oconfig_item_t *conf;
377 conf = oconfig_parse_file (filename);
380 ERROR ("Unable to read config file %s.", filename);
384 for (i = 0; i < conf->children_num; i++)
386 if (conf->children[i].children == NULL)
387 dispatch_value (conf->children + i);
389 dispatch_block (conf->children + i);