munin plugin to show CPU frequency using sysctl for FreeBSD

sysctl_cpufreq

#!/bin/sh
#
# CPU frequency from sysctl
#

if [ "$1" = "config" ]; then
  echo "graph_title CPU frequency"
  echo 'graph_category system'
  echo "graph_info This graph shows the cpu frequency"

  echo "freq.label CPU frequency [MHz]"
  echo "freq.info CPU frequency [MHz]"
  echo "freq.type GAUGE"
  exit
fi

if [ "$sysctl" = "" ]; then
  sysctl=sysctl
fi
echo -n "freq.value "
$sysctl -a dev.cpu.0.freq | cut -f 2 -d' '