11 #define CONFIG_FILE_LINE_MAX 4096
13 pthread_rwlock_t config_rwlock = PTHREAD_RWLOCK_INITIALIZER;
15 // ----------------------------------------------------------------------------
18 #define CONFIG_VALUE_LOADED 0x01 // has been loaded from the config
19 #define CONFIG_VALUE_USED 0x02 // has been accessed from the program
20 #define CONFIG_VALUE_CHANGED 0x04 // has been changed from the loaded value
21 #define CONFIG_VALUE_CHECKED 0x08 // has been checked if the value is different from the default
24 avl avl; // the index - this has to be first!
26 unsigned long hash; // a simple hash to speed up searching
27 // we first compare hashes, and only if the hashes are equal we do string comparisons
29 char name[CONFIG_MAX_NAME + 1];
30 char value[CONFIG_MAX_VALUE + 1];
34 struct config_value *next;
40 unsigned long hash; // a simple hash to speed up searching
41 // we first compare hashes, and only if the hashes are equal we do string comparisons
43 char name[CONFIG_MAX_NAME + 1];
45 struct config_value *values;
46 avl_tree values_index;
49 } *config_root = NULL;
52 // ----------------------------------------------------------------------------
55 static int config_value_iterator(avl *a) { if(a) {}; return 0; }
57 static int config_value_compare(void* a, void* b) {
58 if(((struct config_value *)a)->hash < ((struct config_value *)b)->hash) return -1;
59 else if(((struct config_value *)a)->hash > ((struct config_value *)b)->hash) return 1;
60 else return strcmp(((struct config_value *)a)->name, ((struct config_value *)b)->name);
63 #define config_value_index_add(co, cv) avl_insert(&((co)->values_index), (avl *)(cv))
64 #define config_value_index_del(co, cv) avl_remove(&((co)->values_index), (avl *)(cv))
66 static struct config_value *config_value_index_find(struct config *co, const char *name, unsigned long hash) {
67 struct config_value *result = NULL, tmp;
68 tmp.hash = (hash)?hash:simple_hash(name);
69 strncpy(tmp.name, name, CONFIG_MAX_NAME);
70 tmp.name[CONFIG_MAX_NAME] = '\0';
72 avl_search(&(co->values_index), (avl *)&tmp, config_value_iterator, (avl **)&result);
76 // ----------------------------------------------------------------------------
79 static int config_iterator(avl *a) { if(a) {}; return 0; }
81 static int config_compare(void* a, void* b) {
82 if(((struct config *)a)->hash < ((struct config *)b)->hash) return -1;
83 else if(((struct config *)a)->hash > ((struct config *)b)->hash) return 1;
84 else return strcmp(((struct config *)a)->name, ((struct config *)b)->name);
87 avl_tree config_root_index = {
92 #define config_index_add(cfg) avl_insert(&config_root_index, (avl *)(cfg))
93 #define config_index_del(cfg) avl_remove(&config_root_index, (avl *)(cfg))
95 static struct config *config_index_find(const char *name, unsigned long hash) {
96 struct config *result = NULL, tmp;
97 tmp.hash = (hash)?hash:simple_hash(name);
98 strncpy(tmp.name, name, CONFIG_MAX_NAME);
99 tmp.name[CONFIG_MAX_NAME] = '\0';
101 avl_search(&config_root_index, (avl *)&tmp, config_iterator, (avl **)&result);
105 struct config_value *config_value_create(struct config *co, const char *name, const char *value)
107 debug(D_CONFIG, "Creating config entry for name '%s', value '%s', in section '%s'.", name, value, co->name);
109 struct config_value *cv = calloc(1, sizeof(struct config_value));
110 if(!cv) fatal("Cannot allocate config_value");
112 strncpy(cv->name, name, CONFIG_MAX_NAME);
113 strncpy(cv->value, value, CONFIG_MAX_VALUE);
114 cv->hash = simple_hash(cv->name);
116 config_value_index_add(co, cv);
118 // no need for string termination, due to calloc()
120 struct config_value *cv2 = co->values;
122 while (cv2->next) cv2 = cv2->next;
125 else co->values = cv;
130 struct config *config_create(const char *section)
132 debug(D_CONFIG, "Creating section '%s'.", section);
134 struct config *co = calloc(1, sizeof(struct config));
135 if(!co) fatal("Cannot allocate config");
137 strncpy(co->name, section, CONFIG_MAX_NAME);
138 co->hash = simple_hash(co->name);
139 co->values_index.compar = config_value_compare;
141 config_index_add(co);
143 // no need for string termination, due to calloc()
145 struct config *co2 = config_root;
147 while (co2->next) co2 = co2->next;
150 else config_root = co;
155 struct config *config_find_section(const char *section)
157 return config_index_find(section, 0);
160 int load_config(char *filename, int overwrite_used)
163 struct config *co = NULL;
165 pthread_rwlock_wrlock(&config_rwlock);
167 char buffer[CONFIG_FILE_LINE_MAX + 1], *s;
169 if(!filename) filename = CONFIG_DIR "/" CONFIG_FILENAME;
170 FILE *fp = fopen(filename, "r");
172 error("Cannot open file '%s'", CONFIG_DIR "/" CONFIG_FILENAME);
173 pthread_rwlock_unlock(&config_rwlock);
177 while(fgets(buffer, CONFIG_FILE_LINE_MAX, fp) != NULL) {
178 buffer[CONFIG_FILE_LINE_MAX] = '\0';
183 debug(D_CONFIG, "Ignoring line %d, it is empty.", line);
188 if(*s == '[' && s[len - 1] == ']') {
193 co = config_find_section(s);
194 if(!co) co = config_create(s);
200 // line outside a section
201 error("Ignoring line %d ('%s'), it is outsize all sections.", line, s);
206 char *value = strchr(s, '=');
208 error("Ignoring line %d ('%s'), there is no = in it.", line, s);
218 error("Ignoring line %d, name is empty.", line);
222 debug(D_CONFIG, "Ignoring line %d, value is empty.", line);
226 struct config_value *cv = config_value_index_find(co, name, 0);
228 if(!cv) cv = config_value_create(co, name, value);
230 if((cv->flags & CONFIG_VALUE_USED && overwrite_used) || !(cv->flags & CONFIG_VALUE_USED)) {
231 debug(D_CONFIG, "Overwriting '%s/%s'.", line, co->name, cv->name);
232 strncpy(cv->value, value, CONFIG_MAX_VALUE);
233 // termination is already there
236 debug(D_CONFIG, "Ignoring line %d, '%s/%s' is already present and used.", line, co->name, cv->name);
238 cv->flags |= CONFIG_VALUE_LOADED;
243 pthread_rwlock_unlock(&config_rwlock);
247 char *config_get(const char *section, const char *name, const char *default_value)
249 struct config_value *cv;
251 debug(D_CONFIG, "request to get config in section '%s', name '%s', default_value '%s'", section, name, default_value);
253 pthread_rwlock_rdlock(&config_rwlock);
255 struct config *co = config_find_section(section);
256 if(!co) co = config_create(section);
258 cv = config_value_index_find(co, name, 0);
259 if(!cv) cv = config_value_create(co, name, default_value);
260 cv->flags |= CONFIG_VALUE_USED;
262 if(cv->flags & CONFIG_VALUE_LOADED || cv->flags & CONFIG_VALUE_CHANGED) {
263 // this is a loaded value from the config file
264 // if it is different that the default, mark it
265 if(!(cv->flags & CONFIG_VALUE_CHECKED)) {
266 if(strcmp(cv->value, default_value) != 0) cv->flags |= CONFIG_VALUE_CHANGED;
267 cv->flags |= CONFIG_VALUE_CHECKED;
271 // this is not loaded from the config
272 // copy the default value to it
273 strncpy(cv->value, default_value, CONFIG_MAX_VALUE);
276 pthread_rwlock_unlock(&config_rwlock);
280 long long config_get_number(const char *section, const char *name, long long value)
282 char buffer[100], *s;
283 sprintf(buffer, "%lld", value);
285 s = config_get(section, name, buffer);
286 return strtoll(s, NULL, 0);
289 int config_get_boolean(const char *section, const char *name, int value)
295 s = config_get(section, name, s);
297 if(strcmp(s, "yes") == 0 || strcmp(s, "true") == 0 || strcmp(s, "1") == 0) {
307 const char *config_set(const char *section, const char *name, const char *value)
309 struct config_value *cv;
311 debug(D_CONFIG, "request to set config in section '%s', name '%s', value '%s'", section, name, value);
313 pthread_rwlock_wrlock(&config_rwlock);
315 struct config *co = config_find_section(section);
316 if(!co) co = config_create(section);
318 cv = config_value_index_find(co, name, 0);
319 if(!cv) cv = config_value_create(co, name, value);
320 cv->flags |= CONFIG_VALUE_USED;
322 if(strcmp(cv->value, value) != 0) cv->flags |= CONFIG_VALUE_CHANGED;
324 strncpy(cv->value, value, CONFIG_MAX_VALUE);
325 // termination is already there
327 pthread_rwlock_unlock(&config_rwlock);
332 long long config_set_number(const char *section, const char *name, long long value)
335 sprintf(buffer, "%lld", value);
337 config_set(section, name, buffer);
342 int config_set_boolean(const char *section, const char *name, int value)
348 config_set(section, name, s);
353 void generate_config(struct web_buffer *wb, int only_changed)
357 struct config_value *cv;
359 for(i = 0; i < 3 ;i++) {
360 web_buffer_increase(wb, 500);
363 web_buffer_printf(wb,
364 "# NetData Configuration\n"
365 "# You can uncomment and change any of the options bellow.\n"
366 "# The value shown in the commented settings, is the default value.\n"
367 "\n# global netdata configuration\n");
371 web_buffer_printf(wb, "\n\n# per plugin configuration\n");
375 web_buffer_printf(wb, "\n\n# per chart configuration\n");
379 for(co = config_root; co ; co = co->next) {
380 if(strcmp(co->name, "global") == 0 || strcmp(co->name, "plugins") == 0) pri = 0;
381 else if(strncmp(co->name, "plugin:", 7) == 0) pri = 1;
388 for(cv = co->values; cv ; cv = cv->next) {
389 used += (cv->flags && CONFIG_VALUE_USED)?1:0;
390 changed += (cv->flags & CONFIG_VALUE_CHANGED)?1:0;
395 if(only_changed && !changed) continue;
398 web_buffer_increase(wb, 500);
399 web_buffer_printf(wb, "\n# node '%s' is not used.", co->name);
402 web_buffer_increase(wb, CONFIG_MAX_NAME + 4);
403 web_buffer_printf(wb, "\n[%s]\n", co->name);
405 for(cv = co->values; cv ; cv = cv->next) {
407 if(used && !(cv->flags & CONFIG_VALUE_USED)) {
408 web_buffer_increase(wb, CONFIG_MAX_NAME + 200);
409 web_buffer_printf(wb, "\n\t# option '%s' is not used.\n", cv->name);
411 web_buffer_increase(wb, CONFIG_MAX_NAME + CONFIG_MAX_VALUE + 5);
412 web_buffer_printf(wb, "\t%s%s = %s\n", ((!(cv->flags & CONFIG_VALUE_CHANGED)) && (cv->flags & CONFIG_VALUE_USED))?"# ":"", cv->name, cv->value);