10 #include "appconfig.h"
13 #define CONFIG_FILE_LINE_MAX ((CONFIG_MAX_NAME + CONFIG_MAX_VALUE + 1024) * 2)
15 pthread_rwlock_t config_rwlock = PTHREAD_RWLOCK_INITIALIZER;
17 // ----------------------------------------------------------------------------
20 #define CONFIG_VALUE_LOADED 0x01 // has been loaded from the config
21 #define CONFIG_VALUE_USED 0x02 // has been accessed from the program
22 #define CONFIG_VALUE_CHANGED 0x04 // has been changed from the loaded value
23 #define CONFIG_VALUE_CHECKED 0x08 // has been checked if the value is different from the default
26 avl avl; // the index - this has to be first!
28 uint32_t hash; // a simple hash to speed up searching
29 // we first compare hashes, and only if the hashes are equal we do string comparisons
36 struct config_value *next;
42 uint32_t hash; // a simple hash to speed up searching
43 // we first compare hashes, and only if the hashes are equal we do string comparisons
47 struct config_value *values;
48 avl_tree values_index;
51 } *config_root = NULL;
54 // ----------------------------------------------------------------------------
57 static int config_value_iterator(avl *a) { if(a) {}; return 0; }
59 static int config_value_compare(void* a, void* b) {
60 if(((struct config_value *)a)->hash < ((struct config_value *)b)->hash) return -1;
61 else if(((struct config_value *)a)->hash > ((struct config_value *)b)->hash) return 1;
62 else return strcmp(((struct config_value *)a)->name, ((struct config_value *)b)->name);
65 #define config_value_index_add(co, cv) avl_insert(&((co)->values_index), (avl *)(cv))
66 #define config_value_index_del(co, cv) avl_remove(&((co)->values_index), (avl *)(cv))
68 static struct config_value *config_value_index_find(struct config *co, const char *name, uint32_t hash) {
69 struct config_value *result = NULL, tmp;
70 tmp.hash = (hash)?hash:simple_hash(name);
71 tmp.name = (char *)name;
73 avl_search(&(co->values_index), (avl *)&tmp, config_value_iterator, (avl **)&result);
77 // ----------------------------------------------------------------------------
80 static int config_iterator(avl *a) { if(a) {}; return 0; }
82 static int config_compare(void* a, void* b) {
83 if(((struct config *)a)->hash < ((struct config *)b)->hash) return -1;
84 else if(((struct config *)a)->hash > ((struct config *)b)->hash) return 1;
85 else return strcmp(((struct config *)a)->name, ((struct config *)b)->name);
88 avl_tree config_root_index = {
91 PTHREAD_RWLOCK_INITIALIZER
94 #define config_index_add(cfg) avl_insert(&config_root_index, (avl *)(cfg))
95 #define config_index_del(cfg) avl_remove(&config_root_index, (avl *)(cfg))
97 static struct config *config_index_find(const char *name, uint32_t hash) {
98 struct config *result = NULL, tmp;
99 tmp.hash = (hash)?hash:simple_hash(name);
100 tmp.name = (char *)name;
102 avl_search(&config_root_index, (avl *)&tmp, config_iterator, (avl **)&result);
106 struct config_value *config_value_create(struct config *co, const char *name, const char *value)
108 debug(D_CONFIG, "Creating config entry for name '%s', value '%s', in section '%s'.", name, value, co->name);
110 struct config_value *cv = calloc(1, sizeof(struct config_value));
111 if(!cv) fatal("Cannot allocate config_value");
113 cv->name = strdup(name);
114 if(!cv->name) fatal("Cannot allocate config.name");
115 cv->hash = simple_hash(cv->name);
117 cv->value = strdup(value);
118 if(!cv->value) fatal("Cannot allocate config.value");
120 config_value_index_add(co, cv);
122 // no need for string termination, due to calloc()
124 struct config_value *cv2 = co->values;
126 while (cv2->next) cv2 = cv2->next;
129 else co->values = cv;
134 struct config *config_create(const char *section)
136 debug(D_CONFIG, "Creating section '%s'.", section);
138 struct config *co = calloc(1, sizeof(struct config));
139 if(!co) fatal("Cannot allocate config");
141 co->name = strdup(section);
142 if(!co->name) fatal("Cannot allocate config.name");
143 co->hash = simple_hash(co->name);
145 avl_init(&co->values_index, config_value_compare);
147 config_index_add(co);
149 // no need for string termination, due to calloc()
151 struct config *co2 = config_root;
153 while (co2->next) co2 = co2->next;
156 else config_root = co;
161 struct config *config_find_section(const char *section)
163 return config_index_find(section, 0);
166 int load_config(char *filename, int overwrite_used)
169 struct config *co = NULL;
171 pthread_rwlock_wrlock(&config_rwlock);
173 char buffer[CONFIG_FILE_LINE_MAX + 1], *s;
175 if(!filename) filename = CONFIG_DIR "/" CONFIG_FILENAME;
176 FILE *fp = fopen(filename, "r");
178 error("Cannot open file '%s'", CONFIG_DIR "/" CONFIG_FILENAME);
179 pthread_rwlock_unlock(&config_rwlock);
183 while(fgets(buffer, CONFIG_FILE_LINE_MAX, fp) != NULL) {
184 buffer[CONFIG_FILE_LINE_MAX] = '\0';
189 debug(D_CONFIG, "Ignoring line %d, it is empty.", line);
194 if(*s == '[' && s[len - 1] == ']') {
199 co = config_find_section(s);
200 if(!co) co = config_create(s);
206 // line outside a section
207 error("Ignoring line %d ('%s'), it is outsize all sections.", line, s);
212 char *value = strchr(s, '=');
214 error("Ignoring line %d ('%s'), there is no = in it.", line, s);
224 error("Ignoring line %d, name is empty.", line);
228 debug(D_CONFIG, "Ignoring line %d, value is empty.", line);
232 struct config_value *cv = config_value_index_find(co, name, 0);
234 if(!cv) cv = config_value_create(co, name, value);
236 if(((cv->flags & CONFIG_VALUE_USED) && overwrite_used) || !(cv->flags & CONFIG_VALUE_USED)) {
237 debug(D_CONFIG, "Overwriting '%s/%s'.", line, co->name, cv->name);
239 cv->value = strdup(value);
240 if(!cv->value) fatal("Cannot allocate config.value");
243 debug(D_CONFIG, "Ignoring line %d, '%s/%s' is already present and used.", line, co->name, cv->name);
245 cv->flags |= CONFIG_VALUE_LOADED;
250 pthread_rwlock_unlock(&config_rwlock);
254 char *config_get(const char *section, const char *name, const char *default_value)
256 struct config_value *cv;
258 debug(D_CONFIG, "request to get config in section '%s', name '%s', default_value '%s'", section, name, default_value);
260 pthread_rwlock_rdlock(&config_rwlock);
262 struct config *co = config_find_section(section);
263 if(!co) co = config_create(section);
265 cv = config_value_index_find(co, name, 0);
267 cv = config_value_create(co, name, default_value);
270 cv->flags |= CONFIG_VALUE_USED;
272 if((cv->flags & CONFIG_VALUE_LOADED) || (cv->flags & CONFIG_VALUE_CHANGED)) {
273 // this is a loaded value from the config file
274 // if it is different that the default, mark it
275 if(!(cv->flags & CONFIG_VALUE_CHECKED)) {
276 if(strcmp(cv->value, default_value) != 0) cv->flags |= CONFIG_VALUE_CHANGED;
277 cv->flags |= CONFIG_VALUE_CHECKED;
281 pthread_rwlock_unlock(&config_rwlock);
285 long long config_get_number(const char *section, const char *name, long long value)
287 char buffer[100], *s;
288 sprintf(buffer, "%lld", value);
290 s = config_get(section, name, buffer);
293 return strtoll(s, NULL, 0);
296 int config_get_boolean(const char *section, const char *name, int value)
302 s = config_get(section, name, s);
305 if(!strcmp(s, "yes")) return 1;
309 const char *config_set(const char *section, const char *name, const char *value)
311 struct config_value *cv;
313 debug(D_CONFIG, "request to set config in section '%s', name '%s', value '%s'", section, name, value);
315 pthread_rwlock_wrlock(&config_rwlock);
317 struct config *co = config_find_section(section);
318 if(!co) co = config_create(section);
320 cv = config_value_index_find(co, name, 0);
321 if(!cv) cv = config_value_create(co, name, value);
322 cv->flags |= CONFIG_VALUE_USED;
324 if(strcmp(cv->value, value) != 0) cv->flags |= CONFIG_VALUE_CHANGED;
327 cv->value = strdup(value);
328 if(!cv->value) fatal("Cannot allocate config.value");
330 pthread_rwlock_unlock(&config_rwlock);
335 long long config_set_number(const char *section, const char *name, long long value)
338 sprintf(buffer, "%lld", value);
340 config_set(section, name, buffer);
345 int config_set_boolean(const char *section, const char *name, int value)
351 config_set(section, name, s);
356 void generate_config(BUFFER *wb, int only_changed)
360 struct config_value *cv;
362 for(i = 0; i < 3 ;i++) {
366 "# NetData Configuration\n"
367 "# You can uncomment and change any of the options below.\n"
368 "# The value shown in the commented settings, is the default value.\n"
369 "\n# global netdata configuration\n");
373 buffer_strcat(wb, "\n\n# per plugin configuration\n");
377 buffer_strcat(wb, "\n\n# per chart configuration\n");
381 for(co = config_root; co ; co = co->next) {
382 if(strcmp(co->name, "global") == 0 || strcmp(co->name, "plugins") == 0) pri = 0;
383 else if(strncmp(co->name, "plugin:", 7) == 0) pri = 1;
390 for(cv = co->values; cv ; cv = cv->next) {
391 used += (cv->flags && CONFIG_VALUE_USED)?1:0;
392 changed += (cv->flags & CONFIG_VALUE_CHANGED)?1:0;
397 if(only_changed && !changed) continue;
400 buffer_sprintf(wb, "\n# node '%s' is not used.", co->name);
403 buffer_sprintf(wb, "\n[%s]\n", co->name);
405 for(cv = co->values; cv ; cv = cv->next) {
407 if(used && !(cv->flags & CONFIG_VALUE_USED)) {
408 buffer_sprintf(wb, "\n\t# option '%s' is not used.\n", cv->name);
410 buffer_sprintf(wb, "\t%s%s = %s\n", ((!(cv->flags & CONFIG_VALUE_CHANGED)) && (cv->flags & CONFIG_VALUE_USED))?"# ":"", cv->name, cv->value);