#!/bin/sh
#
# Plugin to graph cpu speed on FreeBSD
#
# Parameters:
#
# 	sysctl      - Override path to sysctl program
#
#%# family=auto
#%# capabilities=autoconf

sysctl=${sysctl:-/sbin/sysctl}

if [ "$1" = "autoconf" ]; then
	if [ -x ${sysctl} ]; then
		${sysctl} dev.cpu.0.freq 2>/dev/null | grep 'dev' >/dev/null 2>/dev/null
		if [ "$?" = "0" ]; then
		    echo yes
		    exit 0
		fi
		echo "no (dev.cpu.0.freq not found)"
		exit 1
	else
		echo "no (sysctl binary not found)"
		exit 2
	fi
fi

if [ "$1" = "config" ]; then

	echo 'graph_title CPU speed'
	echo 'graph_args --base 1000 -l 0'
	echo 'graph_vlabel speed in MHz'
	echo 'graph_category system'
	echo 'graph_scale no'
	echo 'graph_info Current CPU speed in MHz. Available levels for the CPU:' `$sysctl -n dev.cpu.0.freq_levels|sed 's!/[0-9]*!!g;s! !, !g'` 'MHz'

	echo cpu0.label cpu0
	echo cpu0.info `$sysctl -n hw.model` Speed

        exit 0
fi

file=/usr/local/var/munin/plugin-state/cpuspeed

echo -n "cpu0.value "
if find $file -mtime -300s 2>/dev/null|grep -Fq $file ; then
	head -1 $file
else 
	$sysctl -n dev.cpu.0.freq
fi

# Get/cache cpuspeed "later".
export sysctl file
sh -c '(
 rand=$(dd if=/dev/urandom bs=1 count=1 2>/dev/null|od -A n -D)
 rand=$(expr $rand \* 60 / 256 + 25)
 sleep $rand
 $sysctl -n dev.cpu.0.freq > $file
)&' >/dev/null 2>&1