#!/bin/sh
#
# Copyright (c) 2017 Babak Farrokhi.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
#%# family=auto
#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then
	echo yes
	exit 0
fi

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

	echo 'graph_title CPU usage'
	echo 'graph_order system interrupt user nice idle'
	echo "graph_args --base 1000 -r --lower-limit 0 --upper-limit $PERCENT "
	echo 'graph_vlabel %'
	echo 'graph_scale no'
	echo 'graph_info This graph shows how CPU time is spent.'
	echo 'graph_category system'
	echo 'graph_period second'
	echo 'system.label system'
	echo 'system.draw AREA'
	echo 'system.max 100'
	echo 'system.type DERIVE'
	echo 'system.min 0'
	echo 'system.info CPU time spent by the kernel in system activities'
	echo 'interrupt.label interrupt'
	echo 'interrupt.draw STACK'
	echo 'interrupt.max 100'
	echo 'interrupt.type DERIVE'
	echo 'interrupt.min 0'
	echo 'interrupt.info CPU time spent by the kernel processing interrupts'
	echo 'user.label user'
	echo 'user.draw STACK'
	echo 'user.max 100'
	echo 'user.type DERIVE'
	echo 'user.info CPU time spent by normal programs and daemons'
	echo 'user.min 0'
	echo 'nice.label nice'
	echo 'nice.draw STACK'
	echo 'nice.max 100'
	echo 'nice.type DERIVE'
	echo 'nice.info CPU time spent by nice(1)d programs'
	echo 'nice.min 0'
	echo 'idle.label idle'
	echo 'idle.draw STACK'
	echo 'idle.max 100'
	echo 'idle.type DERIVE'
	echo 'idle.info Idle CPU time'
	echo 'idle.min 0'
	exit 0
fi

#iostat -c2 -w0.1 -n0 | tail -1 | awk '{ print "user.value " $3 "\nnice.value " $4 "\nsystem.value " $5 "\ninterrupt.value " $6 "\nidle.value " $7 }'
# It expects to find our cpustat binary in /usr/local/bin
/usr/local/bin/cpustat