sdb_timeseries_info_t *
sdb_timeseries_info_create(size_t data_names_len, const char * const *data_names)
{
sdb_timeseries_info_t *ts_info;
ts_info = calloc(1, sizeof(*ts_info));
if (! ts_info)
return NULL;
if (stringv_copy(&ts_info->data_names, &ts_info->data_names_len,
data_names, data_names_len)) {
sdb_timeseries_info_destroy(ts_info);
return NULL;
}
return ts_info;
} /* sdb_timeseries_info_create */
static sdb_timeseries_info_t *
sdb_rrd_describe(const char *id, sdb_object_t *user_data)
{
rrd_info_t *info, *iter;
char filename[strlen(id) + 1];
sdb_timeseries_info_t *ts_info;
strncpy(filename, id, sizeof(filename));
if (user_data) {
/* -> use RRDCacheD */
char *addr = SDB_OBJ_WRAPPER(user_data)->data;
if (! rrdcached_connect(addr))
return NULL;
#ifdef HAVE_RRD_CLIENT_H
/* TODO: detect and use rrdc_info if possible */
sdb_log(SDB_LOG_ERR, "DESCRIBE not yet supported via RRDCacheD");
return NULL;
#endif
}
else {
rrd_clear_error();
info = rrd_info_r(filename);
}
if (! info) {
sdb_log(SDB_LOG_ERR, "Failed to extract header information from '%s': %s",
filename, rrd_get_error());
return NULL;
}
ts_info = calloc(1, sizeof(*ts_info));
if (! ts_info) {
sdb_log(SDB_LOG_ERR, "Failed to allocate memory");
rrd_info_free(info);
return NULL;
}
for (iter = info; iter != NULL; iter = iter->next) {
size_t len, n, m;
char *ds_name;
char **tmp;
/* Parse the DS name. The raw value is not exposed via the rrd_info
* interface. */
n = strlen("ds[");
if (strncmp(iter->key, "ds[", n))
continue;
len = strlen(iter->key);
m = strlen("].index");
if ((len < m) || strcmp(iter->key + len - m, "].index"))
continue;
ds_name = iter->key + n;
len -= n;
ds_name[len - m] = '\0';
/* Append the new datum. */
tmp = realloc(ts_info->data_names,
(ts_info->data_names_len + 1) * sizeof(*ts_info->data_names));
if (! tmp) {
sdb_log(SDB_LOG_ERR, "Failed to allocate memory");
sdb_timeseries_info_destroy(ts_info);
rrd_info_free(info);
return NULL;
}
ts_info->data_names = tmp;
ts_info->data_names[ts_info->data_names_len] = strdup(ds_name);
if (! ts_info->data_names[ts_info->data_names_len]) {
sdb_log(SDB_LOG_ERR, "Failed to allocate memory");
sdb_timeseries_info_destroy(ts_info);
rrd_info_free(info);
return NULL;
}
ts_info->data_names_len++;
}
rrd_info_free(info);
return ts_info;
} /* sdb_rrd_describe */
