for (i = 0; i < rrd.stat_head->ds_cnt; i++) {
fprintf(out_file, "\t<ds>\n");
fprintf(out_file, "\t\t<name>%s</name>\n", rrd.ds_def[i].ds_nam);
for (i = 0; i < rrd.stat_head->ds_cnt; i++) {
fprintf(out_file, "\t<ds>\n");
fprintf(out_file, "\t\t<name>%s</name>\n", rrd.ds_def[i].ds_nam);