buffer_sprintf(wb, "{\n"
"\t\"hostname\": \"%s\""
+ ",\n\t\"version\": \"%s\""
+ ",\n\t\"os\": \"%s\""
",\n\t\"update_every\": %d"
",\n\t\"history\": %d"
",\n\t\"charts\": {"
, localhost.hostname
+ , program_version
+ , os_type
, rrd_update_every
, rrd_default_history_entries
);