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) {
161 debug(D_CONFIG, "Creating config entry for name '%s', value '%s', in section '%s'.", name, value, co->name);
163 struct config_option *cv = callocz(1, sizeof(struct config_option));
164 cv->name = strdupz(name);
165 cv->hash = simple_hash(cv->name);
166 cv->value = strdupz(value);
168 struct config_option *found = appconfig_option_index_add(co, cv);
170 error("indexing of config '%s' in section '%s': already exists - using the existing one.", cv->name, co->name);
177 config_section_wrlock(co);
178 struct config_option *cv2 = co->values;
180 while (cv2->next) cv2 = cv2->next;
183 else co->values = cv;
184 config_section_unlock(co);
189 int appconfig_exists(struct config *root, const char *section, const char *name) {
190 struct config_option *cv;
192 debug(D_CONFIG, "request to get config in section '%s', name '%s'", section, name);
194 struct section *co = appconfig_section_find(root, section);
197 cv = appconfig_option_index_find(co, name, 0);
203 int appconfig_move(struct config *root, const char *section_old, const char *name_old, const char *section_new, const char *name_new) {
204 struct config_option *cv_old, *cv_new;
207 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);
209 struct section *co_old = appconfig_section_find(root, section_old);
210 if(!co_old) return ret;
212 struct section *co_new = appconfig_section_find(root, section_new);
213 if(!co_new) co_new = appconfig_section_create(root, section_new);
215 config_section_wrlock(co_old);
216 config_section_wrlock(co_new);
218 cv_old = appconfig_option_index_find(co_old, name_old, 0);
219 if(!cv_old) goto cleanup;
221 cv_new = appconfig_option_index_find(co_new, name_new, 0);
222 if(cv_new) goto cleanup;
224 if(unlikely(appconfig_option_index_del(co_old, cv_old) != cv_old))
225 error("INTERNAL ERROR: deletion of config '%s' from section '%s', deleted tge wrong config entry.", cv_old->name, co_old->name);
227 if(co_old->values == cv_old) {
228 co_old->values = cv_old->next;
231 struct config_option *t;
232 for(t = co_old->values; t && t->next != cv_old ;t = t->next) ;
233 if(!t || t->next != cv_old)
234 error("INTERNAL ERROR: cannot find variable '%s' in section '%s' of the config - but it should be there.", cv_old->name, co_old->name);
236 t->next = cv_old->next;
240 cv_old->name = strdupz(name_new);
241 cv_old->hash = simple_hash(cv_old->name);
244 cv_new->next = co_new->values;
245 co_new->values = cv_new;
247 if(unlikely(appconfig_option_index_add(co_new, cv_old) != cv_old))
248 error("INTERNAL ERROR: re-indexing of config '%s' in section '%s', already exists.", cv_old->name, co_new->name);
253 config_section_unlock(co_new);
254 config_section_unlock(co_old);
258 char *appconfig_get(struct config *root, const char *section, const char *name, const char *default_value)
260 struct config_option *cv;
262 debug(D_CONFIG, "request to get config in section '%s', name '%s', default_value '%s'", section, name, default_value);
264 struct section *co = appconfig_section_find(root, section);
265 if(!co) co = appconfig_section_create(root, section);
267 cv = appconfig_option_index_find(co, name, 0);
269 cv = appconfig_value_create(co, name, default_value);
272 cv->flags |= CONFIG_VALUE_USED;
274 if((cv->flags & CONFIG_VALUE_LOADED) || (cv->flags & CONFIG_VALUE_CHANGED)) {
275 // this is a loaded value from the config file
276 // if it is different that the default, mark it
277 if(!(cv->flags & CONFIG_VALUE_CHECKED)) {
278 if(strcmp(cv->value, default_value) != 0) cv->flags |= CONFIG_VALUE_CHANGED;
279 cv->flags |= CONFIG_VALUE_CHECKED;
286 long long appconfig_get_number(struct config *root, const char *section, const char *name, long long value)
288 char buffer[100], *s;
289 sprintf(buffer, "%lld", value);
291 s = appconfig_get(root, section, name, buffer);
294 return strtoll(s, NULL, 0);
297 int appconfig_get_boolean(struct config *root, const char *section, const char *name, int value)
303 s = appconfig_get(root, section, name, s);
306 if(!strcmp(s, "yes") || !strcmp(s, "auto") || !strcmp(s, "on demand")) return 1;
310 int appconfig_get_boolean_ondemand(struct config *root, const char *section, const char *name, int value)
314 if(value == CONFIG_BOOLEAN_AUTO)
317 else if(value == CONFIG_BOOLEAN_NO)
323 s = appconfig_get(root, section, name, s);
326 if(!strcmp(s, "yes"))
327 return CONFIG_BOOLEAN_YES;
328 else if(!strcmp(s, "no"))
329 return CONFIG_BOOLEAN_NO;
330 else if(!strcmp(s, "auto") || !strcmp(s, "on demand"))
331 return CONFIG_BOOLEAN_AUTO;
336 const char *appconfig_set_default(struct config *root, const char *section, const char *name, const char *value)
338 struct config_option *cv;
340 debug(D_CONFIG, "request to set config in section '%s', name '%s', value '%s'", section, name, value);
342 struct section *co = appconfig_section_find(root, section);
343 if(!co) return appconfig_set(root, section, name, value);
345 cv = appconfig_option_index_find(co, name, 0);
346 if(!cv) return appconfig_set(root, section, name, value);
348 cv->flags |= CONFIG_VALUE_USED;
350 if(cv->flags & CONFIG_VALUE_LOADED)
353 if(strcmp(cv->value, value) != 0) {
354 cv->flags |= CONFIG_VALUE_CHANGED;
357 cv->value = strdupz(value);
363 const char *appconfig_set(struct config *root, const char *section, const char *name, const char *value)
365 struct config_option *cv;
367 debug(D_CONFIG, "request to set config in section '%s', name '%s', value '%s'", section, name, value);
369 struct section *co = appconfig_section_find(root, section);
370 if(!co) co = appconfig_section_create(root, section);
372 cv = appconfig_option_index_find(co, name, 0);
373 if(!cv) cv = appconfig_value_create(co, name, value);
374 cv->flags |= CONFIG_VALUE_USED;
376 if(strcmp(cv->value, value) != 0) {
377 cv->flags |= CONFIG_VALUE_CHANGED;
380 cv->value = strdupz(value);
386 long long appconfig_set_number(struct config *root, const char *section, const char *name, long long value)
389 sprintf(buffer, "%lld", value);
391 appconfig_set(root, section, name, buffer);
396 int appconfig_set_boolean(struct config *root, const char *section, const char *name, int value)
402 appconfig_set(root, section, name, s);
408 // ----------------------------------------------------------------------------
411 int appconfig_load(struct config *root, char *filename, int overwrite_used)
414 struct section *co = NULL;
416 char buffer[CONFIG_FILE_LINE_MAX + 1], *s;
418 if(!filename) filename = CONFIG_DIR "/" CONFIG_FILENAME;
420 debug(D_CONFIG, "Opening config file '%s'", filename);
422 FILE *fp = fopen(filename, "r");
424 error("Cannot open file '%s'", filename);
428 while(fgets(buffer, CONFIG_FILE_LINE_MAX, fp) != NULL) {
429 buffer[CONFIG_FILE_LINE_MAX] = '\0';
434 debug(D_CONFIG, "Ignoring line %d, it is empty.", line);
438 int len = (int) strlen(s);
439 if(*s == '[' && s[len - 1] == ']') {
444 co = appconfig_section_find(root, s);
445 if(!co) co = appconfig_section_create(root, s);
451 // line outside a section
452 error("Ignoring line %d ('%s'), it is outside all sections.", line, s);
457 char *value = strchr(s, '=');
459 error("Ignoring line %d ('%s'), there is no = in it.", line, s);
469 error("Ignoring line %d, name is empty.", line);
473 debug(D_CONFIG, "Ignoring line %d, value is empty.", line);
477 struct config_option *cv = appconfig_option_index_find(co, name, 0);
479 if(!cv) cv = appconfig_value_create(co, name, value);
481 if(((cv->flags & CONFIG_VALUE_USED) && overwrite_used) || !(cv->flags & CONFIG_VALUE_USED)) {
482 debug(D_CONFIG, "Line %d, overwriting '%s/%s'.", line, co->name, cv->name);
484 cv->value = strdupz(value);
487 debug(D_CONFIG, "Ignoring line %d, '%s/%s' is already present and used.", line, co->name, cv->name);
489 cv->flags |= CONFIG_VALUE_LOADED;
497 void appconfig_generate(struct config *root, BUFFER *wb, int only_changed)
501 struct config_option *cv;
503 for(i = 0; i < 3 ;i++) {
507 "# netdata configuration\n"
509 "# You can download the latest version of this file, using:\n"
511 "# wget -O /etc/netdata/netdata.conf http://localhost:19999/netdata.conf\n"
513 "# curl -o /etc/netdata/netdata.conf http://localhost:19999/netdata.conf\n"
515 "# You can uncomment and change any of the options below.\n"
516 "# The value shown in the commented settings, is the default value.\n"
518 "\n# global netdata configuration\n");
522 buffer_strcat(wb, "\n\n# per plugin configuration\n");
526 buffer_strcat(wb, "\n\n# per chart configuration\n");
530 appconfig_wrlock(root);
531 for(co = root->sections; co ; co = co->next) {
532 if(!strcmp(co->name, CONFIG_SECTION_GLOBAL)
533 || !strcmp(co->name, CONFIG_SECTION_WEB)
534 || !strcmp(co->name, CONFIG_SECTION_PLUGINS)
535 || !strcmp(co->name, CONFIG_SECTION_REGISTRY)
536 || !strcmp(co->name, CONFIG_SECTION_HEALTH)
537 || !strcmp(co->name, CONFIG_SECTION_BACKEND)
538 || !strcmp(co->name, CONFIG_SECTION_STREAM)
541 else if(!strncmp(co->name, "plugin:", 7)) pri = 1;
549 config_section_wrlock(co);
550 for(cv = co->values; cv ; cv = cv->next) {
551 used += (cv->flags & CONFIG_VALUE_USED)?1:0;
552 changed += (cv->flags & CONFIG_VALUE_CHANGED)?1:0;
555 config_section_unlock(co);
558 if(only_changed && !changed) continue;
561 buffer_sprintf(wb, "\n# node '%s' is not used.", co->name);
564 buffer_sprintf(wb, "\n[%s]\n", co->name);
566 config_section_wrlock(co);
567 for(cv = co->values; cv ; cv = cv->next) {
569 if(used && !(cv->flags & CONFIG_VALUE_USED)) {
570 buffer_sprintf(wb, "\n\t# option '%s' is not used.\n", cv->name);
572 buffer_sprintf(wb, "\t%s%s = %s\n", ((!(cv->flags & CONFIG_VALUE_CHANGED)) && (cv->flags & CONFIG_VALUE_USED))?"# ":"", cv->name, cv->value);
574 config_section_unlock(co);
577 appconfig_unlock(root);