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

: << =cut

=head1 NAME

systemd - Plugin to monitor systemd units state

=head1 APPLICABLE SYSTEMS

Linux systems with systemd installed.

=head1 CONFIGURATION

None needed.

=head1 AUTHOR

Olivier Mehani <shtrom+munin@ssji.net>

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

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

=cut

states="active \
	reloading \
	inactive \
	failed \
	activating \
	deactivating"
autoconf() {
	which systemctl >/dev/null && \
	       systemctl  --state=failed --no-pager --no-legend	>/dev/null 2>&1 && echo yes || echo "no (No systemctl or error running it)"
}

config () {
	cat << EOF
graph_title Systemd units state
graph_args -l 0
graph_category system
graph_scale no
graph_vlabel units
EOF
	for state in $states; do
		echo "$state.label $state"
		echo "$state.draw AREASTACK"
		if [ "$state" = "failed" ]; then
			echo "$state.warning 0"
			echo "$state.critical 10"
		fi
	done
}

fetch () {
	tmp=$(mktemp -t munin-systemd_units.XXXXXX)
	trap "rm \"$tmp\"" EXIT
	systemctl --no-pager --no-legend --all | awk '{print $1, $3}' > "$tmp"
	for state in \
		$states ; do
	echo -n "$state.value "
	grep -c "$state$" "$tmp"
	extinfo=$(grep "$state$" "$tmp" | cut -d " " -f 1)
	if [ -n "$extinfo" ]; then
		echo "$state.extinfo" $extinfo
	fi
done
}

case $1 in
	"autoconf")
		autoconf
		;;
	"config")
		config
		;;
	*)
		fetch
		;;
esac