3 #define CONFIG_FILE_LINE_MAX ((CONFIG_MAX_NAME + CONFIG_MAX_VALUE + 1024) * 2)
5 // ----------------------------------------------------------------------------
8 #define CONFIG_VALUE_LOADED 0x01 // has been loaded from the config
9 #define CONFIG_VALUE_USED 0x02 // has been accessed from the program
10 #define CONFIG_VALUE_CHANGED 0x04 // has been changed from the loaded value
11 #define CONFIG_VALUE_CHECKED 0x08 // has been checked if the value is different from the default
13 struct config_option {
14 avl avl; // the index - this has to be first!
17 uint32_t hash; // a simple hash to speed up searching
18 // we first compare hashes, and only if the hashes are equal we do string comparisons
23 struct config_option *next; // config->mutex protects just this
29 uint32_t hash; // a simple hash to speed up searching
30 // we first compare hashes, and only if the hashes are equal we do string comparisons
34 struct section *next; // gloabl config_mutex protects just this
36 struct config_option *values;
37 avl_tree_lock values_index;
39 pthread_mutex_t mutex; // this locks only the writers, to ensure atomic updates
40 // readers are protected using the rwlock in avl_tree_lock
43 static int appconfig_section_compare(void *a, void *b);
45 struct config netdata_config = {
47 .mutex = PTHREAD_MUTEX_INITIALIZER,
49 { NULL, appconfig_section_compare },
54 struct config stream_config = {
56 .mutex = PTHREAD_MUTEX_INITIALIZER,
58 { NULL, appconfig_section_compare },
63 // ----------------------------------------------------------------------------
66 static inline void appconfig_wrlock(struct config *root) {
67 pthread_mutex_lock(&root->mutex);
70 static inline void appconfig_unlock(struct config *root) {
71 pthread_mutex_unlock(&root->mutex);
74 static inline void config_section_wrlock(struct section *co) {
75 pthread_mutex_lock(&co->mutex);
78 static inline void config_section_unlock(struct section *co) {
79 pthread_mutex_unlock(&co->mutex);
83 // ----------------------------------------------------------------------------
84 // config name-value index
86 static int appconfig_option_compare(void *a, void *b) {
87 if(((struct config_option *)a)->hash < ((struct config_option *)b)->hash) return -1;
88 else if(((struct config_option *)a)->hash > ((struct config_option *)b)->hash) return 1;
89 else return strcmp(((struct config_option *)a)->name, ((struct config_option *)b)->name);
92 #define appconfig_option_index_add(co, cv) (struct config_option *)avl_insert_lock(&((co)->values_index), (avl *)(cv))
93 #define appconfig_option_index_del(co, cv) (struct config_option *)avl_remove_lock(&((co)->values_index), (avl *)(cv))
95 static struct config_option *appconfig_option_index_find(struct section *co, const char *name, uint32_t hash) {
96 struct config_option tmp;
97 tmp.hash = (hash)?hash:simple_hash(name);
98 tmp.name = (char *)name;
100 return (struct config_option *)avl_search_lock(&(co->values_index), (avl *) &tmp);
104 // ----------------------------------------------------------------------------
105 // config sections index
107 static int appconfig_section_compare(void *a, void *b) {
108 if(((struct section *)a)->hash < ((struct section *)b)->hash) return -1;
109 else if(((struct section *)a)->hash > ((struct section *)b)->hash) return 1;
110 else return strcmp(((struct section *)a)->name, ((struct section *)b)->name);
113 #define appconfig_index_add(root, cfg) (struct section *)avl_insert_lock(&root->index, (avl *)(cfg))
114 #define appconfig_index_del(root, cfg) (struct section *)avl_remove_lock(&root->index, (avl *)(cfg))
116 static struct section *appconfig_index_find(struct config *root, const char *name, uint32_t hash) {
118 tmp.hash = (hash)?hash:simple_hash(name);
119 tmp.name = (char *)name;
121 return (struct section *)avl_search_lock(&root->index, (avl *) &tmp);
125 // ----------------------------------------------------------------------------
126 // config section methods
128 static inline struct section *appconfig_section_find(struct config *root, const char *section) {
129 return appconfig_index_find(root, section, 0);
132 static inline struct section *appconfig_section_create(struct config *root, const char *section) {
133 debug(D_CONFIG, "Creating section '%s'.", section);
135 struct section *co = callocz(1, sizeof(struct section));
136 co->name = strdupz(section);
137 co->hash = simple_hash(co->name);
139 avl_init_lock(&co->values_index, appconfig_option_compare);
141 if(unlikely(appconfig_index_add(root, co) != co))
142 error("INTERNAL ERROR: indexing of section '%s', already exists.", co->name);
144 appconfig_wrlock(root);
145 struct section *co2 = root->sections;
147 while (co2->next) co2 = co2->next;
150 else root->sections = co;
151 appconfig_unlock(root);
157 // ----------------------------------------------------------------------------
158 // config name-value methods
160 static inline struct config_option *appconfig_value_create(struct section *co, const char *name, const char *value)
162 debug(D_CONFIG, "Creating config entry for name '%s', value '%s', in section '%s'.", name, value, co->name);
164 struct config_option *cv = callocz(1, sizeof(struct config_option));
165 cv->name = strdupz(name);
166 cv->hash = simple_hash(cv->name);
167 cv->value = strdupz(value);
169 if(unlikely(appconfig_option_index_add(co, cv) != cv))
170 error("INTERNAL ERROR: indexing of config '%s' in section '%s': already exists.", cv->name, co->name);
172 config_section_wrlock(co);
173 struct config_option *cv2 = co->values;
175 while (cv2->next) cv2 = cv2->next;
178 else co->values = cv;
179 config_section_unlock(co);
184 int appconfig_exists(struct config *root, const char *section, const char *name) {
185 struct config_option *cv;
187 debug(D_CONFIG, "request to get config in section '%s', name '%s'", section, name);
189 struct section *co = appconfig_section_find(root, section);
192 cv = appconfig_option_index_find(co, name, 0);
198 int appconfig_move(struct config *root, const char *section_old, const char *name_old, const char *section_new, const char *name_new) {
199 struct config_option *cv_old, *cv_new;
202 debug(D_CONFIG, "request to rename config in section '%s', old name '%s', to section '%s', new name '%s'", section_old, name_old, section_new, name_new);
204 struct section *co_old = appconfig_section_find(root, section_old);
205 if(!co_old) return -1;
207 struct section *co_new = appconfig_section_find(root, section_new);
208 if(!co_new) co_new = appconfig_section_create(root, section_new);
210 config_section_wrlock(co_old);
211 config_section_wrlock(co_new);
213 cv_old = appconfig_option_index_find(co_old, name_old, 0);
214 if(!cv_old) goto cleanup;
216 cv_new = appconfig_option_index_find(co_new, name_new, 0);
217 if(cv_new) goto cleanup;
219 if(unlikely(appconfig_option_index_del(co_old, cv_old) != cv_old))
220 error("INTERNAL ERROR: deletion of config '%s' from section '%s', deleted tge wrong config entry.", cv_old->name, co_old->name);
222 if(co_old->values == cv_old) {
223 co_old->values = cv_old->next;
226 struct config_option *t;
227 for(t = co_old->values; t && t->next != cv_old ;t = t->next) ;
228 if(!t || t->next != cv_old)
229 error("INTERNAL ERROR: cannot find variable '%s' in section '%s' of the config - but it should be there.", cv_old->name, co_old->name);
231 t->next = cv_old->next;
235 cv_old->name = strdupz(name_new);
236 cv_old->hash = simple_hash(cv_old->name);
238 cv_new->next = co_new->values;
239 co_new->values = cv_new;
241 if(unlikely(appconfig_option_index_add(co_new, cv_old) != cv_old))
242 error("INTERNAL ERROR: indexing of config '%s' in section '%s', already exists.", cv_old->name, co_new->name);
247 config_section_unlock(co_new);
248 config_section_unlock(co_old);
252 char *appconfig_get(struct config *root, const char *section, const char *name, const char *default_value)
254 struct config_option *cv;
256 debug(D_CONFIG, "request to get config in section '%s', name '%s', default_value '%s'", section, name, default_value);
258 struct section *co = appconfig_section_find(root, section);
259 if(!co) co = appconfig_section_create(root, section);
261 cv = appconfig_option_index_find(co, name, 0);
263 cv = appconfig_value_create(co, name, default_value);
266 cv->flags |= CONFIG_VALUE_USED;
268 if((cv->flags & CONFIG_VALUE_LOADED) || (cv->flags & CONFIG_VALUE_CHANGED)) {
269 // this is a loaded value from the config file
270 // if it is different that the default, mark it
271 if(!(cv->flags & CONFIG_VALUE_CHECKED)) {
272 if(strcmp(cv->value, default_value) != 0) cv->flags |= CONFIG_VALUE_CHANGED;
273 cv->flags |= CONFIG_VALUE_CHECKED;
280 long long appconfig_get_number(struct config *root, const char *section, const char *name, long long value)
282 char buffer[100], *s;
283 sprintf(buffer, "%lld", value);
285 s = appconfig_get(root, section, name, buffer);
288 return strtoll(s, NULL, 0);
291 int appconfig_get_boolean(struct config *root, const char *section, const char *name, int value)
297 s = appconfig_get(root, section, name, s);
300 if(!strcmp(s, "yes") || !strcmp(s, "auto") || !strcmp(s, "on demand")) return 1;
304 int appconfig_get_boolean_ondemand(struct config *root, const char *section, const char *name, int value)
308 if(value == CONFIG_BOOLEAN_AUTO)
311 else if(value == CONFIG_BOOLEAN_NO)
317 s = appconfig_get(root, section, name, s);
320 if(!strcmp(s, "yes"))
321 return CONFIG_BOOLEAN_YES;
322 else if(!strcmp(s, "no"))
323 return CONFIG_BOOLEAN_NO;
324 else if(!strcmp(s, "auto") || !strcmp(s, "on demand"))
325 return CONFIG_BOOLEAN_AUTO;
330 const char *appconfig_set_default(struct config *root, const char *section, const char *name, const char *value)
332 struct config_option *cv;
334 debug(D_CONFIG, "request to set config in section '%s', name '%s', value '%s'", section, name, value);
336 struct section *co = appconfig_section_find(root, section);
337 if(!co) return appconfig_set(root, section, name, value);
339 cv = appconfig_option_index_find(co, name, 0);
340 if(!cv) return appconfig_set(root, section, name, value);
342 cv->flags |= CONFIG_VALUE_USED;
344 if(cv->flags & CONFIG_VALUE_LOADED)
347 if(strcmp(cv->value, value) != 0) {
348 cv->flags |= CONFIG_VALUE_CHANGED;
351 cv->value = strdupz(value);
357 const char *appconfig_set(struct config *root, const char *section, const char *name, const char *value)
359 struct config_option *cv;
361 debug(D_CONFIG, "request to set config in section '%s', name '%s', value '%s'", section, name, value);
363 struct section *co = appconfig_section_find(root, section);
364 if(!co) co = appconfig_section_create(root, section);
366 cv = appconfig_option_index_find(co, name, 0);
367 if(!cv) cv = appconfig_value_create(co, name, value);
368 cv->flags |= CONFIG_VALUE_USED;
370 if(strcmp(cv->value, value) != 0) {
371 cv->flags |= CONFIG_VALUE_CHANGED;
374 cv->value = strdupz(value);
380 long long appconfig_set_number(struct config *root, const char *section, const char *name, long long value)
383 sprintf(buffer, "%lld", value);
385 appconfig_set(root, section, name, buffer);
390 int appconfig_set_boolean(struct config *root, const char *section, const char *name, int value)
396 appconfig_set(root, section, name, s);
402 // ----------------------------------------------------------------------------
405 int appconfig_load(struct config *root, char *filename, int overwrite_used)
408 struct section *co = NULL;
410 char buffer[CONFIG_FILE_LINE_MAX + 1], *s;
412 if(!filename) filename = CONFIG_DIR "/" CONFIG_FILENAME;
414 debug(D_CONFIG, "Opening config file '%s'", filename);
416 FILE *fp = fopen(filename, "r");
418 error("Cannot open file '%s'", filename);
422 while(fgets(buffer, CONFIG_FILE_LINE_MAX, fp) != NULL) {
423 buffer[CONFIG_FILE_LINE_MAX] = '\0';
428 debug(D_CONFIG, "Ignoring line %d, it is empty.", line);
432 int len = (int) strlen(s);
433 if(*s == '[' && s[len - 1] == ']') {
438 co = appconfig_section_find(root, s);
439 if(!co) co = appconfig_section_create(root, s);
445 // line outside a section
446 error("Ignoring line %d ('%s'), it is outside all sections.", line, s);
451 char *value = strchr(s, '=');
453 error("Ignoring line %d ('%s'), there is no = in it.", line, s);
463 error("Ignoring line %d, name is empty.", line);
467 debug(D_CONFIG, "Ignoring line %d, value is empty.", line);
471 struct config_option *cv = appconfig_option_index_find(co, name, 0);
473 if(!cv) cv = appconfig_value_create(co, name, value);
475 if(((cv->flags & CONFIG_VALUE_USED) && overwrite_used) || !(cv->flags & CONFIG_VALUE_USED)) {
476 debug(D_CONFIG, "Line %d, overwriting '%s/%s'.", line, co->name, cv->name);
478 cv->value = strdupz(value);
481 debug(D_CONFIG, "Ignoring line %d, '%s/%s' is already present and used.", line, co->name, cv->name);
483 cv->flags |= CONFIG_VALUE_LOADED;
491 void appconfig_generate(struct config *root, BUFFER *wb, int only_changed)
495 struct config_option *cv;
497 for(i = 0; i < 3 ;i++) {
501 "# netdata configuration\n"
503 "# You can download the latest version of this file, using:\n"
505 "# wget -O /etc/netdata/netdata.conf http://localhost:19999/netdata.conf\n"
507 "# curl -o /etc/netdata/netdata.conf http://localhost:19999/netdata.conf\n"
509 "# You can uncomment and change any of the options below.\n"
510 "# The value shown in the commented settings, is the default value.\n"
512 "\n# global netdata configuration\n");
516 buffer_strcat(wb, "\n\n# per plugin configuration\n");
520 buffer_strcat(wb, "\n\n# per chart configuration\n");
524 appconfig_wrlock(root);
525 for(co = root->sections; co ; co = co->next) {
526 if(!strcmp(co->name, CONFIG_SECTION_GLOBAL)
527 || !strcmp(co->name, CONFIG_SECTION_API)
528 || !strcmp(co->name, CONFIG_SECTION_PLUGINS)
529 || !strcmp(co->name, CONFIG_SECTION_REGISTRY)
530 || !strcmp(co->name, CONFIG_SECTION_HEALTH)
531 || !strcmp(co->name, CONFIG_SECTION_BACKEND)
532 || !strcmp(co->name, CONFIG_SECTION_STREAM)
535 else if(!strncmp(co->name, "plugin:", 7)) pri = 1;
543 config_section_wrlock(co);
544 for(cv = co->values; cv ; cv = cv->next) {
545 used += (cv->flags & CONFIG_VALUE_USED)?1:0;
546 changed += (cv->flags & CONFIG_VALUE_CHANGED)?1:0;
549 config_section_unlock(co);
552 if(only_changed && !changed) continue;
555 buffer_sprintf(wb, "\n# node '%s' is not used.", co->name);
558 buffer_sprintf(wb, "\n[%s]\n", co->name);
560 config_section_wrlock(co);
561 for(cv = co->values; cv ; cv = cv->next) {
563 if(used && !(cv->flags & CONFIG_VALUE_USED)) {
564 buffer_sprintf(wb, "\n\t# option '%s' is not used.\n", cv->name);
566 buffer_sprintf(wb, "\t%s%s = %s\n", ((!(cv->flags & CONFIG_VALUE_CHANGED)) && (cv->flags & CONFIG_VALUE_USED))?"# ":"", cv->name, cv->value);
568 config_section_unlock(co);
571 appconfig_unlock(root);