git.itanic.dy.fi Git - rrdd/blob - config.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3
   4 #include "debug.h"
   5 #include "config.h"
   6 #include "rrdtool.h"
   7 #include "parser.h"
   8
   9 #define RRD_DATABASE_LIST "rrd_database"
  10 #define RRD_DATABASE_NAME "name"
  11
  12 static int read_strings_from_list(config_setting_t *list, const char ***strings)
  13 {
  14         config_setting_t *string;
  15         int j;
  16         int str_count = config_setting_length(list);
  17         const char **strs;
  18
  19         strs = calloc(sizeof(*strs), str_count + 1);
  20
  21         for (j = 0; j < str_count; j++) {
  22                 const char *str;
  23
  24                 string = config_setting_get_elem(list, j);
  25                 str = config_setting_get_string(string);
  26                 strs[j] = strdup(str);
  27         }
  28         *strings = strs;
  29
  30         return 0;
  31 }
  32
  33 static int parse_images(config_setting_t *list, struct rrd_database *db)
  34 {
  35         int i, count;
  36         config_setting_t *image, *str_list;
  37         const char *database = NULL, *filename = NULL, *timestart = NULL;
  38         const char *timeend = NULL, *imageformat = NULL;
  39         const char **options = NULL, **text = NULL;
  40         const char *updatestr = NULL;
  41         int width = 0, height = 0, text_lead = 0;
  42
  43         count = config_setting_length(list);
  44
  45         pr_info("%s: Parsing %d images\n", db->name, count);
  46         db->images = calloc(sizeof(*db->images), count + 1);
  47
  48         for (i = 0; i < count; i++) {
  49                 image = config_setting_get_elem(list, i);
  50                 db->images[i] = calloc(sizeof(*db->images[i]), 1);
  51
  52                 config_setting_lookup_string(image, "database", &database);
  53                 config_setting_lookup_int(image, "text_lead", &text_lead);
  54
  55                 /*
  56                  * The config_setting_lookup_* functions will leave
  57                  * the destination unchanged in case requested value
  58                  * is not found. If that is the case, the value from
  59                  * previous image group is used. That makes it
  60                  * possible for the user to only define once all
  61                  * fields and then leave identical fields unset on the
  62                  * following groups, making it easier to define many
  63                  * almost identical images.
  64                  */
  65
  66                 config_setting_lookup_string(image, "filename", &filename);
  67                 if (!filename) {
  68                         pr_err("Database %s does not have \"filename\" entry "
  69                                 " in image data\n",
  70                                 db->name);
  71                         return -1;
  72                 }
  73
  74                 config_setting_lookup_int(image, "width", &width);
  75                 if (!width) {
  76                         pr_err("Database %s does not have \"width\" entry "
  77                                 " in image data\n",
  78                                 db->name);
  79                         return -1;
  80                 }
  81
  82                 config_setting_lookup_int(image, "height", &height);
  83                 if (!height) {
  84                         pr_err("Database %s does not have \"height\" entry "
  85                                 " in image data\n",
  86                                 db->name);
  87                         return -1;
  88                 }
  89
  90                 config_setting_lookup_string(image, "timestart", &timestart);
  91                 if (!timestart) {
  92                         pr_err("Database %s does not have \"timestart\" entry "
  93                                 " in image data\n",
  94                                 db->name);
  95                         return -1;
  96                 }
  97
  98                 config_setting_lookup_string(image, "timeend", &timeend);
  99                 if (!timeend) {
 100                         pr_err("Database %s does not have \"timeend\" entry "
 101                                 " in image data\n",
 102                                 db->name);
 103                         return -1;
 104                 }
 105
 106                 config_setting_lookup_string(image, "imageformat",
 107                                         &imageformat);
 108                 if (!imageformat) {
 109                         pr_err("Database %s does not have \"imageformat\" "\
 110                                 "entry in image data\n",
 111                                 db->name);
 112                         return -1;
 113                 }
 114
 115                 config_setting_lookup_string(image, "update_string",
 116                                         &updatestr);
 117
 118                 str_list = config_setting_get_member(image, "options");
 119                 if (str_list)
 120                         read_strings_from_list(str_list, &options);
 121
 122                 str_list = config_setting_get_member(image, "text");
 123                 if (str_list)
 124                         read_strings_from_list(str_list, &text);
 125
 126                 db->images[i]->rrd_database     =
 127                         database ? strdup(database) : NULL;
 128                 db->images[i]->image_filename   = strdup(filename);
 129                 db->images[i]->width            = width;
 130                 db->images[i]->height           = height;
 131                 strncpy(db->images[i]->timestart, timestart,
 132                         sizeof(db->images[i]->timestart) - 1);
 133                 strncpy(db->images[i]->timeend, timeend,
 134                         sizeof(db->images[i]->timeend) - 1);
 135                 strncpy(db->images[i]->imageformat, imageformat,
 136                         sizeof(db->images[i]->imageformat) - 1);
 137                 db->images[i]->options          = options;
 138                 db->images[i]->text_lead        = text_lead;
 139                 db->images[i]->text             = text;
 140
 141                 if (updatestr)
 142                         db->images[i]->updatestr = strdup(updatestr);
 143         }
 144
 145         return 0;
 146 }
 147
 148 static int parse_data_sources(config_setting_t *rrd, struct rrd_database *db)
 149 {
 150         config_setting_t *list, *group;
 151         int i, count;
 152         const char *type = NULL, *name = NULL;
 153         int heartbeat = 0;
 154         double min = 0;
 155         double max = 0;
 156
 157         list = config_setting_get_member(rrd, "sources");
 158         if (!list) {
 159                 pr_info("No data sources\n");
 160                 return 0;
 161         }
 162
 163         if (!config_setting_is_list(list)) {
 164                 pr_err("Data sources have no list\n");
 165                 return 0;
 166         }
 167
 168         count = config_setting_length(list);
 169         db->sources = calloc(sizeof(*db->sources), count + 1);
 170
 171         for (i = 0; i < count; i++) {
 172                 group = config_setting_get_elem(list, i);
 173
 174                 config_setting_lookup_string(group, "type", &type);
 175                 config_setting_lookup_string(group, "name", &name);
 176                 config_setting_lookup_float(group, "min", &min);
 177                 config_setting_lookup_float(group, "max", &max);
 178                 config_setting_lookup_int(group, "heartbeat", &heartbeat);
 179
 180                 db->sources[i].type = strdup(type);
 181                 db->sources[i].name = strdup(name);
 182                 db->sources[i].heartbeat = heartbeat;
 183                 db->sources[i].min = min;
 184                 db->sources[i].max = max;
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int parse_archives(config_setting_t *rrd, struct rrd_database *db)
 191 {
 192         config_setting_t *list, *group;
 193         int i, count;
 194         const char *type = NULL;
 195         double xff = 0;
 196         int steps = 0;
 197         int rows = 0;
 198
 199         list = config_setting_get_member(rrd, "archives");
 200         if (!list) {
 201                 pr_info("No archive found\n");
 202                 return 0;
 203         }
 204
 205         if (!config_setting_is_list(list)) {
 206                 pr_err("Archive does not contain a list\n");
 207                 return 0;
 208         }
 209
 210         count = config_setting_length(list);
 211         db->archives = calloc(sizeof(*db->archives), count + 1);
 212
 213         for (i = 0; i < count; i++) {
 214                 group = config_setting_get_elem(list, i);
 215
 216                 config_setting_lookup_string(group, "type", &type);
 217                 config_setting_lookup_float(group, "xff", &xff);
 218                 config_setting_lookup_int(group, "steps", &steps);
 219                 config_setting_lookup_int(group, "rows", &rows);
 220
 221                 db->archives[i].type = strdup(type);
 222                 db->archives[i].xff = xff;
 223                 db->archives[i].steps = steps;
 224                 db->archives[i].rows = rows;
 225         }
 226
 227         return 0;
 228 }
 229
 230 static int parse_database(config_setting_t *rrd, struct rrd_database *db)
 231 {
 232         config_setting_t *list, *str_list;
 233         const char *name, *parser = NULL, *filename, **parser_data;
 234         const char **pre_draw_cmd;
 235         const char **post_draw_cmd;
 236         const char *logfile = NULL, *logfile_timestamp_fmt = NULL;
 237
 238         if (!config_setting_lookup_string(rrd, "name", &name)) {
 239                 pr_err("Database entry does not contain name\n");
 240                 return -1;
 241         }
 242
 243         pr_info("parsing database %s\n", name);
 244         db->name = strdup(name);
 245
 246         if (!config_setting_lookup_string(rrd, "filename", &filename))
 247                 pr_err("Database %s does not contain filename\n", db->name);
 248
 249         db->filename = strdup(filename);
 250
 251         if (!config_setting_lookup_int(rrd, "interval", &db->interval)) {
 252                 pr_err("Database %s does not have interval set\n", name);
 253                 return -1;
 254         }
 255
 256         /* Parser is not a mandatory parameter */
 257         config_setting_lookup_string(rrd, "parser", &parser);
 258         db->parser = str_to_parser(parser);
 259
 260         list = config_setting_get_member(rrd, "image");
 261         parse_images(list, db);
 262         parse_data_sources(rrd, db);
 263         parse_archives(rrd, db);
 264
 265         str_list = config_setting_get_member(rrd, "parser_data");
 266         if (str_list) {
 267                 read_strings_from_list(str_list, &parser_data);
 268                 db->parser_data = parser_data;
 269         }
 270
 271         str_list = config_setting_get_member(rrd, "pre_draw_cmd");
 272         if (str_list) {
 273                 read_strings_from_list(str_list, &pre_draw_cmd);
 274                 db->pre_draw_cmd = (char *const *)pre_draw_cmd;
 275         }
 276
 277         str_list = config_setting_get_member(rrd, "post_draw_cmd");
 278         if (str_list) {
 279                 read_strings_from_list(str_list, &post_draw_cmd);
 280                 db->post_draw_cmd = (char *const *)post_draw_cmd;
 281         }
 282
 283         config_setting_lookup_string(rrd, "logfile", &logfile);
 284         if (logfile)
 285                 db->logfile = strdup(logfile);
 286
 287         config_setting_lookup_string(rrd, "logfile_timestamp_fmt",
 288                                 &logfile_timestamp_fmt);
 289         if (logfile_timestamp_fmt)
 290                 db->logfile_timestamp_fmt = strdup(logfile_timestamp_fmt);
 291
 292
 293         return 0;
 294 }
 295
 296 struct rrd_database **populate_database(const char *conffile)
 297 {
 298         struct rrd_database **rrd_db = NULL;
 299         config_t config;
 300         config_setting_t *rrd_database;
 301         int i, count;
 302
 303         config_init(&config);
 304
 305         if (!config_read_file(&config, conffile)) {
 306                 pr_err("%s:%d - %s\n", config_error_file(&config),
 307                         config_error_line(&config),
 308                         config_error_text(&config));
 309                 goto out;
 310         }
 311
 312         rrd_database = config_lookup(&config, "rrd_database");
 313         count = config_setting_length(rrd_database);
 314
 315         /*
 316          * Allocate one element extra. The last one is zeroed out to
 317          * indicate the end of the db list
 318          */
 319         rrd_db = calloc(count + 1, sizeof(*rrd_db));
 320
 321         pr_info("There are %d database entries\n", count);
 322
 323         for (i = 0; i < count; i++) {
 324                 config_setting_t *rrd;
 325                 rrd_db[i] = calloc(1, sizeof(*rrd_db[i]));
 326                 rrd = config_setting_get_elem(rrd_database, i);
 327                 parse_database(rrd, rrd_db[i]);
 328         }
 329
 330 out:
 331         config_destroy(&config);
 332         return rrd_db;
 333 }