#!/usr/bin/sh
# -*- sh -*-

: <<=cut

=head1 NAME

acpi - Munin plugin to monitor the temperature in different ACPI Thermal zones.

=head1 APPLICABLE SYSTEMS

Linux systems with ACPI support.

=head1 CONFIGURATION

Load the 'thermal' kernel module and the plugin gets the thermal zones from /sys/class/thermal/thermal_zone*/ automagically.

=head1 USAGE

Link this plugin to /etc/munin/plugins/ and restart the munin-node.

=head1 INTERPRETATION

The plugin shows the temperature from the different thermal zones.

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=head1 BUGS

None known.

=head1 VERSION

v1.0 - 2006-11-13
v1.1 - 2018-03-24

=head1 AUTHOR

Nicolai Langfeldt (janl@linpro.no) 2006-11-13

=head1 LICENSE

GPLv2

=cut


# directories containing thermal zone information
if [ -d /sys/class/thermal/ ]; then
    ATZ=$(find /sys/class/thermal/ -maxdepth 1 -name "thermal_zone*" | sort -V)
else
    ATZ=
fi


do_ () { # Fetch
    for ZONE in $ATZ; do
         TEMP=$(cat "$ZONE/temp")
         echo "$(basename "$ZONE").value $(echo "$TEMP" | awk '{print $1/1000}')"
    done
    exit 0
}

do_config () {
    echo "graph_title ACPI Thermal zone temperatures"
    echo "graph_vlabel Celsius"
    echo "graph_category sensors"
    echo "graph_info This graph shows the temperature in different ACPI Thermal zones.  If there is only one it will usually be the case temperature."
    for ZONE in $ATZ; do
         TYPE=$(cat "$ZONE/type")
         echo "$(basename "$ZONE").label $TYPE"
    done
    # print values immediately if dirtyconfig is supported
    if [ "${MUNIN_CAP_DIRTYCONFIG:-0}" = 1 ]; then do_; fi
}

do_autoconf () {
    if [ -z "$ATZ" ]; then
        echo "no (failed to find thermal zones below /sys/class/thermal/thermal_zone*)"
	exit 0
    fi
    for f in $ATZ; do
	if [ ! -r "$f/temp" ]; then
	    echo "no (cannot read $f/temp)"
	    exit 0
	fi
    done
    echo yes
    exit 0
}

case $1 in
    config|autoconf|'')
	"do_$1"
esac

exit $?