config_df() {
  echo "graph_title Filesystem usage (in %)
graph_args --upper-limit 100 -l 0
graph_vlabel %
graph_category disk
graph_info This graph shows disk usage on the machine."
  df -PT | grep '^/' | grep -vwE "$DF_IGNORE_FILESYSTEM_REGEX" | while read dev type blocks used avail pct mp
  do
    PNAME=$(clean_fieldname "$dev")
    echo "$PNAME.label $mp"
    echo "$PNAME.info $dev -> $mp"
    echo "$PNAME.warning 92"
    echo "$PNAME.critical 98"
  done
}
fetch_df() {
  df -PT | grep '^/' | grep -vwE "$DF_IGNORE_FILESYSTEM_REGEX" | while read dev type blocks used avail pct mp
  do
    PNAME=$(clean_fieldname "$dev")
    echo "$PNAME.value" "${pct%\%}"
  done
}